Dendrobium Officinale Polysaccharide Alleviates Hepatic Fibrosis via Epithelial-Mesenchymal Transition / 中山大学学报(医学科学版)

ObjectiveTo investigate the effect of Dendrobium officinale polysaccharide （DOP）on CCl4-induced hepatic fibrosis（HF）and its mechanism. MethodsA total of 56 male SD rats were randomly divided into seven groups： normal group（NG），model group（MG），colchicine group（CG， 0.1 mg/kg）， Fuzheng Huayu group（FG， 0.45 g/kg），low-dose DOP group（LDG， 0.05 g/kg），middle-dose DOP group（MDG， 0.1 g/kg）and high-dose DOP group（HDG，0.2 g/kg），with 8 rats in each group. HF rat model was established by subcutaneous injection with 40% CCl4 olive oil mixture， every 3-day for 10 weeks. At the end of the sixth week， the drug groups were treated with colchicine， Fuzheng Huayu and DOP solution by gavage respectively， once a day for 4 weeks. NG and MG groups were similarly handled with an equal amount of 0.9 % normal saline. Liver histopathology was detected using hematoxylin-eosin （HE）， Masson and Sirius red staining； blood biochemistry was tested for liver function and four indicators of HF； RT-qPCR and Western Blot were used to measure the expression of α-SMA， Col-I， E-cadherin， and ZEB1 genes and proteins in the liver tissues of rats， respectively. ResultsHE， Masson， and Sirius red staining showed that the liver tissue of MG rats had typical pathologic features of HF， and the degree of HF was alleviated in LDG， MDG， and HDG rats， respectively. Liver function test results showed that the serum AST， TBIL， and AKP levels were significantly lower in LDG， MDG， and HDG， compared with those of the MG （P < 0.05 or < 0.01）. Meanwhile， ALT levels in serum deceased remarkably except in LDG （P < 0.05 or < 0.01）. The four results of HF showed that the serum HA， LN， PC-Ⅲ， and COL-Ⅳ levels in LDG， MDG， and HDG rats were significantly decreased compared with those of the MG （P < 0.05 or < 0.01）. The relative expressions of α-SMA， COL-I， and ZEB1 genes and proteins were significantly decreased in the liver tissues of LDG， MDG， and HDG （P < 0.05 or < 0.01）， and the relative expression of E-cadherin gene and protein increased （P < 0.05 or < 0.01）. In addition， the expressions of HA， α-SMA， COL-I， ZEB1 and E-cadherin were dependent on the dose of DOP. ConclusionDOP alleviated the degree of CCl4 induced HF in rats by inhibiting the epithelial-mesenchymal transition in liver tissue.

Effect of Baihe Yuzi Prescription on CFTR， AQP， and ZIP Ion Channels and Oxidative Stress in Epididymis of Oligoasthenozoospermia Rats / 中国实验方剂学杂志

ObjectiveTo observe the effects of Baihe Yuzi prescription （BYP） on the cystic fibrosis transmembrane conductance regulator （CFTR）， aquaporin （AQP）， zinc/iron-regulated transporter-like protein （ZIP） and local oxidative stress in epididymis of oligoasthenozoospermia （OAS） rats， and to explore the mechanism of its intervention in OAS. MethodAfter 35 rats were acclimatized for 1 week， 7 rats were randomly selected as the normal group， and the remaining 28 rats were given tripterygium glycosides （TG） 30 mg·kg-1. After 4 weeks of modeling， they were randomly divided into 4 groups： model group， BYP low-dose group （LBYP）， BYP high-dose group （HBYP） and levocarnitine group， with 7 rats in each group. The rats in the normal group and model group were given normal saline at the same dosage. The levocarnitine group rats were given L-carnitine oral liquid （100 mg·kg-1） by gavage. The LBYP group rats were given BYP 6.3 g·kg-1， and the HBYP group rats were given BYP 12.6 g·kg-1 by gavage once a day for consecutive 4 weeks. After the end of the intervention， sperm count and motility of all rats were detected， the histopathological structure of epididymis was observed by hematoxylin-eosin （HE） staining， and the expressions of CFTR， AQP9， AQP3， ZIP8， ZIP12 and other proteins were detected by Western blot. The contents of α-glycosidase （α-GC）， sialic acid （SA）， carnitine， superoxide dismutase （SOD）， glutathione peroxidase （GSH-Px） and malondialdehyde （MDA） were detected by enzyme-linked immunosorbent assay （ELISA）. Total zinc content was measured using an inductively coupled plasma mass spectrometer. Free zinc ion content was detected by zinc ion probes. ResultCompared with those in the normal group， the sperm count and motility of rats were decreased and the epididymal structure was disordered in the model group. The contents of α-GC and carnitine were decreased in epididymis （P<0.05）. MDA levels were increased， while SOD， GSH-Px and zinc levels were decreased （P<0.05）. The expressions of CFTR and ZIP12 in the head and cauda of the epididymis were down-regulated， and AQP3 expression was up-regulated. The expression of ZIP8 in the cauda epididymis was up-regulated （P<0.05）. Compared with the model group， BYP can significantly improve the sperm count and motility， the epididymal structure of OAS rats and the levels of α-GC and carnitine （P<0.05）. The expressions of CFTR and ZIP12 in the head and cauda of the epididymis were up-regulated， while the expressions of ZIP8 in the cauda epididymis and AQP3 in the head of the epididymis were decreased （P<0.05）. The SOD and GSH-Px levels and total zinc content in epididymis were increased， and the MDA levels were decreased （P<0.05）. ConclusionBYP may improve the sperm quality and repair epididymal tissue structure and function of OAS rats， by regulating the expressions of CFTR， AQP3， and ZIP12 ion channels and local antioxidant mechanism.

La suplementación con zinc favorece el crecimiento intrauterino en fetos de ratas diabéticas / Zinc supplementation favours intrauterine growth in diabetic rat fetuses

La deficiencia de zinc puede ser un factor mediador en los trastornos del crecimiento fetal en la descendencia de la gestante diabética. Se persiguió como objetivo determinar la influencia de un suplemento con zinc sobre la morfometría externa corporal y craneofacial en fetos de ratas diabéticas con hiperglucemias moderadas. Durante la gestación, ratas diabéticas y controles fueron suplementadas por vía oral con sulfato de zinc (50 mg/kg-pc) o no recibieron tratamiento. Los fetos descendientes del grupo diabético suplementado presentaron niveles similares a los controles en las variables de crecimiento somático determinadas. La suplementación con zinc a ratas diabéticas favoreció el crecimiento intrauterino en los fetos. Los resultados de esta investigación constituyen aportes para dilucidar los requerimientos de zinc que permitan prevenir los trastornos del crecimiento fetal en la descendencia de gestantes diabéticas.

Zinc deficiency may be a mediating factor in fetal growth disorders in the offspring of diabetic pregnant women. The objective was to determine the influence of a zinc supplement on external body and craniofacial morphometry in diabetic rat fetuses with moderate hyperglycemia. During gestation, diabetic and control rats were orally supplemented with zinc sulphate (50 mg/kg bw) or received no treatment. The fetuses descendants of the supplemented diabetic group had levels similar to the control ones in the determined somatic growth variables. Zinc supplementation to diabetic rats favoured intrauterine growth in fetuses. The results of this research constitute a contribution to elucidate zinc requirements that allow preventing fetal growth disorders in the offspring of diabetic pregnant women.

POSTOPERATIVE PAIN INCIDENCE AND INTENSITY FOLLOWING ROOT CANAL OBTURATION WITH BIOCERAMIC AND OTHER SEALERS: A SYSTEMATIC REVIEW WITH META-ANALYSIS

Aims: To investigate whether bioceramicsealers induce a lower incidence and intensity of postoperative pain compared to other sealers. Materials and Methods: Six electronic databases were searched for studies published up to April 2022, following the PICOS strategy: (P) adult patients undergoing root canal treatment or retreatment; (I) root canal filling using bioceramic sealer; (C) root canal filling using other types of sealers; (O) Primary: postoperative pain incidence and/or intensity; Secondary: number of medication intake; (S) randomizedclinical trials. Risk of bias assessment was performed with the revised Cochrane risk of bias tools for randomized trials (RoB 2). Overall certainty of evidence was assessed through the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) tool. Results: Ten studies were included. Eight studies had a low risk of bias, and two had some concerns risk. Meta-analyses showed no differences regarding postoperative pain intensity and incidence between bioceramic sealers and AH Plus. Number of medication intake seemed to be associated to the preoperative diagnosis. Zinc oxide-eugenol sealer demonstrated an intense postoperative pain compared to bioceramic sealers and AH Plus. GRADE analysis showed a low certainty of evidence for all outcomes. Conclusions: There seem to be no differences between bioceramic sealers and AH Plus regarding postoperative pain intensity and incidence. Number of medication intake seem to be associated to the preoperative diagnosis. Zinc oxide-eugenol evoked a more pronounced postoperative pain.

Indian food habit & food ingredients may have a role in lowering the severity & high death rate from COVID-19 in Indians: findings from the first nutrigenomic analysis

Background & objectives: During the COVID-19 pandemic, the death rate was reportedly 5-8 fold lower in India which is densely populated as compared to less populated western countries. The aim of this study was to investigate whether dietary habits were associated with the variations in COVID-19 severity and deaths between western and Indian population at the nutrigenomics level. Methods: In this study nutrigenomics approach was applied. Blood transcriptome of severe COVID-19 patients from three western countries (showing high fatality) and two datasets from Indian patients were used. Gene set enrichment analyses were performed for pathways, metabolites, nutrients, etc., and compared for western and Indian samples to identify the food- and nutrient-related factors, which may be associated with COVID-19 severity. Data on the daily consumption of twelve key food componentsacross four countries were collected and a correlation between nutrigenomics analyses and per capita daily dietary intake was investigated. Results: Distinct dietary habits of Indians were observed, which may be associated with low death rate from COVID-19. Increased consumption of red meat, dairy products and processed foods by western populations may increase the severity and death rate by activating cytokine storm-related pathways, intussusceptive angiogenesis, hypercapnia and enhancing blood glucose levels due to high contents of sphingolipids, palmitic acid and byproducts such as CO2 and lipopolysaccharide (LPS). Palmitic acid also induces ACE2 expression and increases the infection rate. Coffee and alcohol that are highly consumed in western countries may increase the severity and death rates from COVID-19 by deregulating blood iron, zinc and triglyceride levels. The components of Indian diets maintain high iron and zinc concentrations in blood and rich fibre in their foods may prevent CO2 and LPS-mediated COVID-19 severity. Regular consumption of tea by Indians maintains high high-density lipoprotein (HDL) and low triglyceride in blood as catechins in tea act as natural atorvastatin. Importantly, regular consumption of turmeric in daily food by Indians maintains strong immunity and curcumin in turmeric may prevent pathways and mechanisms associated with SARS-CoV-2 infection and COVID-19 severity and lowered the death rate. Interpretation & conclusions: Our results suggest that Indian food components suppress cytokine storm and various other severity related pathways of COVID-19 and may have a role in lowering severity and death rates from COVID-19 in India as compared to western populations. However, large multi-centered case?control studies are required to support our current findings.

Diabetes materna y deficiencia de zinc: riesgos para la descendencia / Maternal diabetes and zinc deficiency, risks for the offspring

Resumen ANTECEDENTES: Cuando la mujer embarazada tiene déficit de zinc, esta carencia puede ser un factor que contribuya a la aparición de alteraciones en el feto, como las malformaciones congénitas y otros trastornos del desarrollo. OBJETIVO: Identificar los aspectos relevantes del estado actual del conocimiento de las complicaciones de la diabetes en la mujer embarazada y el déficit de zinc en el feto. Además, explicar cuál es la posible consecuencia de la deficiencia del micronutriente, entre otras causas moleculares subyacentes. METODOLOGÍA: Revisión bibliográfica efectuada en las bases de datos de Google, PubMed-Medline y SciELO de artículos publicados en inglés o español del año 2012 al 2022, con los MeSH: Maternal diabetes; Hyperglycemia; Zinc deficiency; Congenital malformations; Epigenetics; con su correspondiente traducción al español. Criterios de selección: artículos originales, estudios prospectivos, de revisión bibliográfica, metanálisis, capítulos de libro y reportes de la Asociación Americana de Diabetes (ADA) y la Asociación Latinoamericana de Diabetes (ALAD). RESULTADOS: Se localizaron 187 artículos de los que se excluyeron 126 no adecuados para el tema de la revisión, duplicados o en idioma diferente al inglés y español. CONCLUSIONES: El análisis bibliográfico evidenció que los trastornos metabólicos provocados por la hiperglucemia de la madre, el déficit de zinc, la alteración de su homeostasis y su interacción con el desequilibrio redox, la inflamación de bajo grado, la activación apoptósica y las modificaciones epigenéticas producen un ambiente intrauterino adverso que condiciona la aparición de malformaciones y otros trastornos del desarrollo en la descendencia.

Abstract BACKGROUND: When pregnant women are deficient in zinc, this deficiency may be a contributing factor to foetal disorders, such as congenital malformations and other developmental disorders. OBJECTIVE: To identify the relevant aspects of the current state of knowledge of the complications of diabetes in pregnant women and zinc deficiency in the foetus. In addition, to explain the possible consequences of micronutrient deficiency, among other underlying molecular causes. METHODOLOGY: Bibliographic review carried out in Google, PubMed-Medline and SciELO databases of articles published in English or Spanish from 2012 to 2022, with the MeSH: Maternal diabetes; Hyperglycemia; Zinc deficiency; Congenital malformations; Epigenetics; with their corresponding translation into Spanish. Selection criteria: original articles, prospective studies, literature reviews, meta-analyses, book chapters and reports of the American Diabetes Association (ADA) and the Latin American Diabetes Association (ALAD). RESULTS: 187 articles were located of which 126 unsuitable for the review topic, duplicates or in language other than English and Spanish were excluded. CONCLUSIONS: The literature review evidenced that metabolic disorders caused by maternal hyperglycemia, zinc deficiency, alteration of its homeostasis and its interaction with redox imbalance, low-grade inflammation, apoptotic activation and epigenetic modifications produce an adverse intrauterine environment that conditions the appearance of malformations and other developmental disorders in the offspring.

Antimicrobial photocatalysis using bio-hydrothermally synthesized Zinc oxide nanoparticles in the management of periodontitis: a prospective split-mouth, double-blind, randomized, controlled clinical trial

Abstract The antimicrobial activity of metallic nanoparticles (NPs) has been confirmed to fight a broad spectrum of microorganisms, through antimicrobial effects that are amplified when these particles are irradiated with light of the proper wavelength. This is the first study to use phytoconjugated Zinc oxide (ZnO) NPs containing traces of active biomolecules derived from Emblica officinalis (E. officinalis) plant extract in antimicrobial photocatalysis (PCT) during non-surgical periodontal therapy. Objectives This study aimed to evaluate the effects of repeated PCT application in the treatment of periodontitis, using a gel containing bio-hydrothermally synthesized ZnO NPs and visible light as an adjunct to scaling and root planing (SRP). Methodology In total, 16 systemically healthy volunteers with stage 3 grade B generalized periodontitis were recruited for this prospective double blind, randomized placebo-controlled trial. After receiving SRP, the subjects received the following interventions in a split-mouth design at baseline, 1 week and 1 month: Group 1 - Placebo gel + Sham PCT; Group 2 - Nano ZnO gel + Sham PCT; Group 3 - Placebo gel + PCT; and Group 4 - Nano ZnO gel + PCT. The site-specific profile of Porphyromonas gingivalis in the subgingival plaque and clinical parameters (Plaque Index, Gingival Index, Gingival Bleeding Index, Probing pocket Depth and Clinical Attachment Level) were assessed at baseline, 1 month and 3 months. Results All interventions tested caused participants' clinical and microbiological parameters to generally improve after 3 months. Subjects who received the Nano ZnO gel + PCT combination showed a sustained and progressive improvement in their treatment outcomes, a result that presented statistically significant differences from the outcomes obtained through the remaining interventions, at all time points during the study period. Conclusions The repeated application of PCT using bio-hydrothermally synthesized ZnO NPs can effectively complement SRP in the non-surgical treatment of Periodontitis.

Deficiência de zinco na doença de Alzheimer: um estudo transversal com grupo comparação / Zinc deficiency in alzheimer's disease: a cross-sectional study with a control group

Resumo Objetivo Identificar se há diferença na concentração plasmática e eritrocitária de zinco na pessoa idosa com e sem a doença de Alzheimer. Métodos Estudo transversal com grupo comparação, realizado com pessoas idosas com e sem doença de Alzheimer, pareadas por sexo, escolaridade e idade. A concentração de zinco foi medida através de espectrofotometria de absorção atômica em forno grafite. Resultados Total de 102 pessoas, 68 no grupo saudável (NDA-g) e 34 o grupo com doença (DA-g). O grupo DA-g apresentou menores concentrações plasmáticas e maior frequência no primeiro quartil para concentrações intraeritrocitárias de zinco. As concentrações plasmáticas e eritrocitárias não apresentaram correlação com tempo de diagnóstico e a idade em ambos os grupos. Na análise de regressão logística, a concentração plasmática esteve associada à DA-g (OR=0,964; p=0,028). Conclusão Pessoas idosas com doença de Alzheimer apresentam menores concentrações plasmáticas e eritrocitárias de zinco.

Abstract Objective To identify whether there is a difference in plasma and erythrocyte zinc concentration in older adults with and without Alzheimer's disease. Methods Crosssectional study with a comparative group, conducted with older adults with and without Alzheimer's disease, matched by sex, education, and age. Zinc concentration was measured by atomic absorption spectrophotometry in a graphite furnace. Results There were 102 people, 68 in the healthy group (NDA-g) and 34 in the group with disease (AD-g). The AD-g group had lower plasma zinc concentrations and higher frequency in the first quartile for intraerythrocyte zinc concentrations. Plasma and erythrocyte concentrations did not correlate with the time of diagnosis and age in both groups. In the logistic regression analysis, plasma concentration was associated with AD-g (OR=0.964; p=0.028). Conclusion Older people with Alzheimer's disease have lower plasma and erythrocyte zinc concentrations.

The Role of Thyroid Hormones, Vitamins, and Microelements in Female Infertility / O papel dos hormônios da tiroide, das vitaminas e dos microelementos na fertilidade feminina

Abstract Objective It is well known that female infertility is multifactorial. Therefore, we aimed to compare the effects of thyroid dysfunction, vitamin deficiency, and microelement deficiency in fertile and infertile patients. Materials and Methods Between May 1st, 2017, and April 1st, 2019, we conducted a retrospective case-control study with of 380 infertile and 346 pregnant patients (who normally fertile and able to conceive spontaneously). The fertile patients were selected among those who got pregnant spontaneously without treatment, had a term birth, and did not have systemic or obstetric diseases. The levels of thyroid-stimulating hormone (TSH), triiodothyronine (T3), thyroxine (T4), anti-thyroid peroxidase (anti-TPO), vitamin D, vitamin B12, folic acid, ferritin, and zinc of both groups were compared. Results There was no difference between patients in the infertile and pregnant groups in terms of low normal and high serum T3 and T4 levels (p = 0.938; p > 0.05) respectively, nor in terms of normal and high anti-TPO levels (p = 0.182; p > 0.05) respectively. There was no significant difference regarding patients with low, insufficient, and sufficient vitamin D levels in the infertile and pregnant groups (p = 0.160; p >0.05) respectively. The levels of folic acid, ferritin, and zinc of the infertile group were significantly lower than those of the pregnant group. Conclusion The serum levels of folic acid, ferritin, and zinc in infertile patients presenting to our outpatient clinic were lower than those o the fertile patients.

Resumo Objetivo Sabe-se que a infertilidade feminina é multifatorial. Portanto, nosso objetivo foi comparar os efeitos da disfunção tireoidiana, deficiência de vitaminas e deficiência de microelementos em pacientes férteis e inférteis. Materiais e Métodos Entre 1° de maio de 2017 e 1° de abril de 2019, realizamos um estudo retrospectivo caso-controle com 380 pacientes inférteis e 346 grávidas (normalmente férteis e capazes de conceber espontaneamente). As pacientes férteis foram selecionadas entre aquelas que engravidaram espontaneamente sem tratamento, tiveram parto a termo e não apresentavam doenças sistêmicas ou obstétricas. Os níveis de hormônio estimulante da tireoide (TSH), triiodotironina (T3), tiroxina (T4), antitireoide peroxidase (anti-TPO), vitamina D, vitamina B12, ácido fólico, ferritina e zinco de ambos os grupos foram comparados. Resultados Não houve diferença entre as pacientes dos grupos inférteis e gestantes em relação aos níveis altos de sérumT3 e T4 normais baixos e altos (p = 0,938; p > 0,05), respectivamente nem aos níveis normais e altos de anti-TPO (p = 0,182; p > 0,05), respectivamente. Não houve diferença significativa em relação aos pacientes com níveis baixos, insuficientes e suficientes de vitamina D nos grupos inférteis e gestantes (p = 0,160; p > 0,05), respectivamente. Os níveis de ácido fólico, ferritina e zinco do grupo infértil foram significativamente menores do que os do grupo grávida. Conclusão Os níveis de sérum de ácido fólico, ferritina e zinco nas pacientes inférteis atendidas em nosso ambulatório foram menores do que nas pacientes férteis.

Effects of chemical and green nano-zinc oxide on histological changes, oxidative stress, and apoptosis in rat kidney associated with cisplatin

Abstract Cisplatin (CP) is used to treat various tumors. A main restriction of cisplatin is nephrotoxicity. This study aimed to evaluate the protective effects of ZnONPs on cisplatin-induced oxidative stress and rat kidney tissue damage. Eighty adult male Wistar rats (250g-270g) were divided into ten groups: Control (CON), Sham (SH), Bulk ZnO (BZnO), Chemical ZnONPs (ChZnONPs), Green ZnONPs (GrZnONPs), Cisplatin (CP), Cisplatin+BulkZnO (CP+BZnO), Cisplatin+Green ZnONPs (CP+GrZnONPs), Cisplatin+Chemical ZnONPs (CP+ChZnONPs), Cisplatin+Explant (CP+EX). CP was i.p administered 5mg/kg/week and BZnO, ChZnONPs and GrZnONPs were i.p administered at a dose of 5mg/kg/day. After 30 days of the treatment, the expression of apoptosis/anti apoptosis related genes oxidant/antioxidant factors and histological changes in the were studied. The CP-treated group showed a decrease in body weight, while the Co-administration of ZGNPs to CP-treated rats showed a significant increase compared to the CP group. The results showed that the increased mRNA level of bax, MDA and the decreased mRNA level of bcl2, SOD and CAT activities in kidney of CP group were improved when animals were treated with ZnO NPs. Our results showed that GrZnONPs, ChZnONPs and BZnO had the potential to protect against oxidative stress and cisplatin-induced neurotoxicity that this protective effect was more evident in GrZnONPs.

Protease inhibitors as a potential agent against visceral Leishmaniasis: A review to inspire future study

Abstract Leishmaniasis is transmitted by sandfly which carries the intracellular protozoa in their midgut. Among visceral, cutaneous and mucocutaneous leishmaniasis, visceral type that is caused by Leishmania donovani is the most lethal one. Findings of leishmanial structure and species took place in 19th century and was initiated by Donovan. Leishmaniasis is still a major concern of health issues in many endemic countries in Asia, Africa, the Americas, and the Mediterranean region. Worldwide1.5-2 million new cases of cutaneous leishmaniasis and 500,000 cases of visceral leishmaniasis are reported each year. Leishmaniasis is endemic in nearly 90 countries worldwide and close to 12 million new cases of leishmaniasis are reported worldwide annually. Studies on antileishmanial drug development is of major concern as leishmaniasis are the second largest parasitic killer in the world and the available drugs are either toxic or costly. The major surface GP63 protease, also known as Zinc- metalloproteases present on the surface of leishmanial promastigotes, can be targeted for drug development. Protease inhibitors targeting such surface proteases show promising results. Different protease inhibitors have been isolated from marine actinobacteria against many infectious diseases. Metabolites produced by these actinobacteria may have greater importance for the discovery and development of new antileishmanial drugs. Hence, this review discusses the background, current situation, treatment, and protease inhibitors from marine actinobacteria for drug development against GP63 molecules.

The effectiveness of EDTA 17% as a cleaning solution for the fiber post space after filling with cements

Aim: To evaluate the resistance of the union between a glass fiber post and radicular dentine after cleaning the root with 17% EDTA and filling with different endodontic cements. Methods: Forty uniradicular bovine incisors were removed to obtain root lengths of 18 mm. Endodontic treatment was performed on all roots using different filling cements (zinc oxide and eugenol-based, OZE; cement based on epoxy resin, AH) and cleaning solutions (saline, SA or EDTA), which made it possible to obtain four groups: OZESA, OZEEDTA, AHSA and AHEDTA. Subsequently, 12 mm of filling material was removed from the roots, and they were prepared to receive fiber posts luted with resin cement. To execute the mechanical cycles (2x106 cycles, 90 N, 4 Hz), coronal reconstruction was performed with a silicon matrix. The roots were then sliced (2-mm thick) to perform the push-out test. The results were analyzed using analysis of variance (one factor and two factors) and Tukey's test (α=0,05). Results: Bond strength (Mpa) was significantly higher for OZEEDTA (9,18) and AHEDTA (8,70) than for OZESA (6,06) AHSA (8,7). OZEEDTA also presented the highest values in the cervical region (15,18) but was significantly lower in the apical region (2,99). However, AHEDTA had a homogeneous bond strength in all thirds. Conclusion: Regardless of the endodontic cement used, EDTA was used as an irrigating solution, culminating in a higher bond strength between the glass fiber post and dentin

Efeito prolongado da toxina botulínica associada à suplementação com zinco e fitase / Prolonged effect of botulinum toxin associated with zinc and phytase supplementation / Efecto prolongado de la toxina de botulino asociada con el suplemento de zinc y la fitasa

A toxina botulínica é produzida naturalmente pela bactéria anaeróbia gram- positiva Clostridium botulinum, sendo considerada uma neurotoxina com efeitos capazes de reduzir atividades do sistema nervoso parassimpático, principalmente em relação as desordens de movimentos. A alta efetividade e o resultado do efeito de bloqueio na contração da musculatura facial justificam sua aplicação regular na estética, atuando no tratamento e prevenção das rugas e linhas de expressão. Entretanto, para a ação da toxina botulínica é necessário que o Zinco (Zn) exerça a ação no bloqueio da contração muscular através do mecanismo da clivagem no receptor SNAP-25. O objetivo deste trabalho é investigar a correlação do mecanismo de ação da toxina botulínica no bloqueio da contração muscular associado com a suplementação via oral de cápsulas de zinco e fitase, para comprovar a efetividade na durabilidade de bloqueio muscular com TBA. A pesquisa foi realizada através da aplicação de um questionário aleatório para participantes da pesquisa que fazem aplicação de TBA na musculatura facial de ambos os gêneros, com idade acima de 18 anos e que realizam a suplementação prévia de Zn e Fitase para aumentar a durabilidade do efeito da neurotoxina. Em relação aos resultados encontrados observou-se uma mudança significativa na duração do efeito da TBA quando associado a suplementação prévia de Zn e fitase. Dos 44 participantes da pesquisa 22,7% responderam que ficaram satisfeitos com os efeitos da TBA sem suplementação prévia, enquanto 93,2% afirmaram no questionário uma duração maior do bloqueio muscular quando suplementaram previamente com Zn e Fitase. Conclui-se que a suplementação de Zn e fitase previamente a aplicação da TBA tem resultado positivo na durabilidade do bloqueio da contração da musculatura facial, o que desperta grande interesse na área da estética aplicada, sugerindo novas terapias complementares que possam assegurar a satisfação dos pacientes que são adeptos a este procedimento estético.

Botulinum toxin is produced naturally by the anaerobic gram-positive bacterium Clostridium botulinum, being considered a neurotoxin with effects capable of reducing activities of the parasympathetic nervous system, mainly in relation to movement disorders. The high effectiveness and the result of the blocking effect in the contraction of the facial musculature justify its regular application in aesthetics, acting in the treatment and prevention of wrinkles and lines of expression. However, for the action of botulinum toxin it is necessary that Zinc (Zn) exerts the action in blocking muscle contraction through the cleavage mechanism in the SNAP-25 receptor. The objective of this work is to investigate the correlation of the mechanism of action of botulinum toxin in the blocking of muscle contraction associated with oral supplementation of zinc capsules and phytase, to prove the effectiveness in the durability of muscle block with TBA.The research was carried out by applying a random questionnaire to research participants who apply TBA in the facial musculature of both genders, aged over 18 years and who perform the previous Zn and Fitase supplementation to increase the durability of the effect of neurotoxin. In relation to the results found, a significant change in the duration of the effect of TBA was observed when associated with previous Zn and phytase supplementation. Of the 44 participants in the survey, 22.7% responded that they were satisfied with the effects of ABR without prior supplementation, while 93.2% stated in the questionnaire a longer duration of muscle block when they had previously supplemented with Zn and Fitase. It is concluded that the Zn and phytase supplementation prior to the application of the TBA has positive result in the durability of the blockage of the contraction of the facial musculature, which arouses great interest in the area of applied aesthetics, suggesting new complementary therapies that can ensure the satisfaction of patients who are adherents to this aesthetic procedure.

La toxina botulínica es producida naturalmente por la bacteria anaeróbica Gram-positiva Clostridium botulinum y se considera una neurotoxina con efectos capaces de reducir las actividades del sistema nervioso parasiinfático, principalmente en relación con los trastornos del movimiento. La alta eficacia y el resultado del efecto bloqueante sobre la contracción de los músculos faciales justifican su aplicación regular en estética, actuando en el tratamiento y prevención de arrugas y líneas de expresión. Mientras tanto, para la acción de la toxina botulínica, es necesario que Zinc (Zn) ejerza la acción de bloqueo de la contracción muscular por el mecanismo de escisión del receptor SNAP-25. El objetivo de este trabajo es investigar la correlación del mecanismo de acción de la toxina botulínica en el bloqueo de la contracción muscular asociada a la suplementación oral de cápsulas de zinc y fitasa, para probar la eficacia de la durabilidad del bloqueo muscular con TBA. La investigación se realizó aplicando un cuestionario aleatorio a los participantes en la investigación que aplican TBA a los músculos faciales de ambos géneros mayores de 18 años y que realizan el suplemento previo de Zn y Fitase para aumentar la durabilidad del efecto neurotoxina. En relación con los resultados hallados, se observó un cambio significativo en la duración del efecto del TBA cuando se asoció con el suplemento de Zn y fitasa. De los 44 participantes en la investigación, el 22,7% respondió que estaban satisfechos con los efectos de la TBA sin suplementos previos, mientras que el 93,2% declaró en el cuestionario una larga duración del bloqueo muscular cuando se les había suplementado previamente con Zn y Fitase. Se concluye que la suplementación con Zn y fitasa previa a la aplicación del TBA ha producido un resultado positivo en la durabilidad del bloqueo de contracción muscular facial, que despierta gran interés en el área de estética aplicada, sugiriendo nuevas terapias complementarias que puedan garantizar la satisfacción de los pacientes que son adeptivos a este procedimiento estético.

Efeito prolongado da toxina botulínica associada à suplementação com zinco e fitase / Prolonged effect of botulinum toxin associated with zinc and phytase supplementation / Efecto prolongado de la toxina de botulino asociada con el suplemento de zinc y la fitasa

A toxina botulínica é produzida naturalmente pela bactéria anaeróbia gram- positiva Clostridium botulinum, sendo considerada uma neurotoxina com efeitos capazes de reduzir atividades do sistema nervoso parassimpático, principalmente em relação as desordens de movimentos. A alta efetividade e o resultado do efeito de bloqueio na contração da musculatura facial justificam sua aplicação regular na estética, atuando no tratamento e prevenção das rugas e linhas de expressão. Entretanto, para a ação da toxina botulínica é necessário que o Zinco (Zn) exerça a ação no bloqueio da contração muscular através do mecanismo da clivagem no receptor SNAP-25. O objetivo deste trabalho é investigar a correlação do mecanismo de ação da toxina botulínica no bloqueio da contração muscular associado com a suplementação via oral de cápsulas de zinco e fitase, para comprovar a efetividade na durabilidade de bloqueio muscular com TBA. A pesquisa foi realizada através da aplicação de um questionário aleatório para participantes da pesquisa que fazem aplicação de TBA na musculatura facial de ambos os gêneros, com idade acima de 18 anos e que realizam a suplementação prévia de Zn e Fitase para aumentar a durabilidade do efeito da neurotoxina. Em relação aos resultados encontrados observou-se uma mudança significativa na duração do efeito da TBA quando associado a suplementação prévia de Zn e fitase. Dos 44 participantes da pesquisa 22,7% responderam que ficaram satisfeitos com os efeitos da TBA sem suplementação prévia, enquanto 93,2% afirmaram no questionário uma duração maior do bloqueio muscular quando suplementaram previamente com Zn e Fitase. Conclui-se que a suplementação de Zn e fitase previamente a aplicação da TBA tem resultado positivo na durabilidade do bloqueio da contração da musculatura facial, o que desperta grande interesse na área da estética aplicada, sugerindo novas terapias complementares que possam assegurar a satisfação dos pacientes que são adeptos a este procedimento estético.

Botulinum toxin is produced naturally by the gram-positive anaerobic bacterium Clostridium botulinum, and is considered a neurotoxin with effects capable of reducing activities of the parasympathetic nervous system, especially in relation to movement disorders. The high effectiveness and the result of the blocking effect on the contraction of facial muscles justify its regular application in aesthetics, acting in the treatment and prevention of wrinkles and expression lines. However, for the action of botulinum toxin it is necessary that the Zinc (Zn) exerts the action of blocking muscle contraction through the cleavage mechanism in the SNAP-25 receptor. The objective of this study is to investigate the correlation of the mechanism of action of botulinum toxin in blocking muscle contraction associated with oral supplementation of zinc capsules and phytase, to prove the effectiveness in the durability of muscle blockade with TBA. The research was carried out by applying a randomized questionnaire to research participants who apply TBA to the facial muscles of both genders, over 18 years of age, and who perform prior supplementation of Zn and Phytase to increase the durability of the neurotoxin effect. In relation to the results found it was observed a significant change in the duration of the effect of TBA when associated with prior supplementation of Zn and phytase. Of the 44 research participants 22.7% responded that they were satisfied with the effects of TBA without prior supplementation, while 93.2% stated in the questionnaire a longer duration of muscle blockade when previously supplemented with Zn and Phytase. We conclude that the supplementation of Zn and phytase previously to the application of TBA has a positive result in the durability of the blockade of facial muscle contraction, which arouses great interest in the area of applied esthetics, suggesting new complementary therapies that can ensure the satisfaction of patients who are adept at this esthetic procedure.

La toxina botulínica es producida naturalmente por la bacteria anaeróbica Gram-positiva Clostridium botulinum y se considera una neurotoxina con efectos capaces de reducir las actividades del sistema nervioso parasiinfático, principalmente en relación con los trastornos del movimiento. La alta eficacia y el resultado del efecto bloqueante sobre la contracción de los músculos faciales justifican su aplicación regular en estética, actuando en el tratamiento y prevención de arrugas y líneas de expresión. Mientras tanto, para la acción de la toxina botulínica, es necesario que Zinc (Zn) ejerza la acción de bloqueo de la contracción muscular por el mecanismo de escisión del receptor SNAP-25. El objetivo de este trabajo es investigar la correlación del mecanismo de acción de la toxina botulínica en el bloqueo de la contracción muscular asociada a la suplementación oral de cápsulas de zinc y fitasa, para probar la eficacia de la durabilidad del bloqueo muscular con TBA. La investigación se realizó aplicando un cuestionario aleatorio a los participantes en la investigación que aplican TBA a los músculos faciales de ambos géneros mayores de 18 años y que realizan el suplemento previo de Zn y Fitase para aumentar la durabilidad del efecto neurotoxina. En relación con los resultados hallados, se observó un cambio significativo en la duración del efecto del TBA cuando se asoció con el suplemento de Zn y fitasa. De los 44 participantes en la investigación, el 22,7% respondió que estaban satisfechos con los efectos de la TBA sin suplementos previos, mientras que el 93,2% declaró en el cuestionario una larga duración del bloqueo muscular cuando se les había suplementado previamente con Zn y Fitase. Se concluye que la suplementación con Zn y fitasa previa a la aplicación del TBA ha producido un resultado positivo en la durabilidad del bloqueo de contracción muscular facial, que despierta gran interés en el área de estética aplicada, sugiriendo nuevas terapias complementarias que puedan garantizar la satisfacción de los pacientes que son adeptivos a este procedimiento estético.

UHRF1/DNMT1-MZF1 axis-modulated intragenic site-specific CpGI methylation confers divergent expression and opposing functions of PRSS3 isoforms in lung cancer

As confusion mounts over RNA isoforms involved in phenotypic plasticity, aberrant CpG methylation-mediated disruption of alternative splicing is increasingly recognized as a driver of intratumor heterogeneity (ITH). Protease serine 3 (PRSS3), possessing four splice variants (PRSS3-SVs; PRSS3-V1-V4), is an indispensable trypsin that shows paradoxical effects on cancer development. Here, we found that PRSS3 transcripts and their isoforms were divergently expressed in lung cancer, exhibiting opposing functions and clinical outcomes, namely, oncogenic PRSS3-V1 and PRSS3-V2 versus tumor-suppressive PRSS3-V3, by targeting different downstream genes. We identified an intragenic CpG island (iCpGI) in PRSS3. Hypermethylation of iCpGI was mediated by UHRF1/DNMT1 complex interference with the binding of myeloid zinc finger 1 (MZF1) to regulate PRSS3 transcription. The garlic-derived compound diallyl trisulfide cooperated with 5-aza-2'-deoxycytidine to exert antitumor effects in lung adenocarcinoma cells through site-specific iCpGI demethylation specifically allowing MZF1 to upregulate PRSS3-V3 expression. Epigenetic silencing of PRSS3-V3 via iCpGI methylation (iCpGIm) in BALF and tumor tissues was associated with early clinical progression in patients with lung cancer but not in those with squamous cell carcinoma or inflammatory disease. Thus, UHRF1/DNMT1-MZF1 axis-modulated site-specific iCpGIm regulates divergent expression of PRSS3-SVs, conferring nongenetic functional ITH, with implications for early detection of lung cancer and targeted therapies.

Assessment of zinc solubilization potential of zinc-resistant Pseudomonas oleovorans strain ZSB13 isolated from contaminated soil / Avaliação do potencial de solubilização do zinco da cepa ZSB13 de Pseudomonas oleovorans resistente ao zinco isolada de solo contaminado

Abstract Zinc is an essential micronutrient that is required for optimum plant growth. It is present in soil in insoluble forms. Bacterial solubilization of soil unavailable form of Zn into available form, is an emerging approach to alleviate the Zn deficiency for plants and human beings. Zinc solubilizing bacteria (ZSB) could be a substitute for chemical Zn fertilizer. The present study aimed to isolate and characterize bacterial species from the contaminated soil and evaluate their Zn solubilizing potential. Zn resistant bacteria were isolated and evaluated for their MIC against Zn. Among the 13 isolated bacterial strains ZSB13 showed maximum MIC value upto 30mM/L. The bacterial strain with the highest resistance against Zn was selected for further analysis. Molecular characterization of ZSB13 was performed by 16S rRNA gene amplification which confirmed it as Pseudomonas oleovorans. Zn solubilization was determined through plate assay and broth medium. Four insoluble salts (zinc oxide (ZnO), zinc carbonate (ZnCO3), zinc sulphite (ZnS) and zinc phosphate (Zn3(PO4)2) were used for solubilization assay. Our results shows 11 mm clear halo zone on agar plates amended with ZnO. Likewise, ZSB13 showed significant release of Zn in broth amended with ZnCO3 (17 and 16.8 ppm) and ZnO (18.2 ppm). Furthermore, Zn resistance genes czcD was also enriched in ZSB13. In our study, bacterial strain comprising Zn solubilization potential has been isolated that could be further used for the growth enhancement of crops.

Resumo O zinco é um micronutriente essencial necessário para o crescimento ideal das plantas. Ele está presente no solo em formas insolúveis. A solubilização bacteriana da forma indisponível de Zn no solo para a forma disponível é uma abordagem emergente para aliviar a deficiência de Zn em plantas e seres humanos. Bactérias solubilizadoras de zinco (ZSB) podem ser um substituto para fertilizantes químicos de Zn. O presente estudo teve como objetivo isolar e caracterizar espécies bacterianas de solo contaminado e avaliar seu potencial de solubilização de Zn. Bactérias resistentes ao Zn foram isoladas e avaliadas quanto ao seu MIC contra o Zn. Entre as 13 cepas bacterianas isoladas, ZSB13 apresentou valor máximo de MIC de até 30 mM/L. A cepa bacteriana com maior resistência ao Zn foi selecionada para análise posterior. A caracterização molecular de ZSB13 foi realizada por amplificação do gene 16S rRNA que o confirmou como Pseudomonas oleovorans. A solubilização do Zn foi determinada através de ensaio em placa e meio caldo. Quatro sais insolúveis (óxido de zinco (ZnO), carbonato de zinco (ZnCO3), sulfito de zinco (ZnS) e fosfato de zinco (Zn3 (PO4) 2) foram usados ​​para o ensaio de solubilização. Nossos resultados mostram uma zona de halo clara de 11 mm em placas de ágar corrigidas com ZnO. Da mesma forma, ZSB13 mostrou liberação significativa de Zn em caldo alterado com ZnCO3 (17 e 16,8 ppm) e ZnO (18,2 ppm). Além disso, os genes de resistência ao Zn czcD também foram enriquecidos em ZSB13. Em nosso estudo, a cepa bacteriana compreendendo potencial de solubilização de Zn foi isolada e poderia ser usada posteriormente para o aumento do crescimento de safras.

Research progress on surface modification of titanium implants by strontium ions / 口腔疾病防治

@#Traditional titanium implants do not completely meet the clinical requirements because they are bioinert. The surface of titanium implants, modified by strontium ions, can enhance osseointegration and reduce peri-implantitis. In this paper, the biological properties of titanium implant surfaces modified by strontium ions were reviewed. Strontium ions can be coated on the implant surface by hydrothermal treatment, electrochemical deposition, phosphate chemical conversion, flame-spraying, supramolecular self-assembly, magnetron sputtering, laser deposition and alkali etching. Implant surfaces modified by strontium ions can not only promote osteogenesis and early osseointegration but also inhibit bacterial growth and reduce postoperative infections. Even better osseointegration and antibacterial effects can be achieved when strontium ions are incorporated with other elements, such as silver, zinc, gallium, and calcium. However, most of the studies on the use of strontium ion-modified titanium implants are animal experiments and in vitro experiments, and the observation time is short compared with the actual service life of the implants. Thus, the conclusions obtained may be different from the actual clinical application, and the long-term effects need to be studied. In addition, the osteogenic effects of various modification methods also need to be compared. Future research can focus on the following points: ① to find efficient modification methods that can be widely used in the clinic; ②to study how to control the concentration of strontium ions near the implant to exert their biological function and reduce their toxic side effects; and ③ to conduct long-term follow-up clinical trials to observe their osteogenic and antibacterial effects.

Effects of electroacupuncture on the glucose-lipid metabolism and the expression of ZAG and GLUT4 in the femoral quadriceps and adipose tissue in the rats with type 2 diabetes mellitus / 中国针灸

OBJECTIVES@#To observe the effects on the glucose-lipid metabolism and the expression of zinc-α2-glycoprotein (ZAG) and glucose transporter 4 (GLUT4) in the femoral quadriceps and adipose tissue after electroacupuncture (EA) at "Pishu" (BL 20), "Weiwanxiashu" (EX-B 3), "Zusanli" (ST 36) and "Sanyinjiao" (SP 6) in the rats with diabetes mellitus type 2 (T2DM), so as to explore the effect mechanism of EA in treatment of T2DM.@*METHODS@#Twelve ZDF male rats were fed with high-sugar and high-fat fodder, Purina #5008 for 4 weeks to induce T2DM model. After successfully modeled, the rats were randomly divided into a model group and an EA group, with 6 rats in each one. Additionally, 6 ZL male rats of the same months age were collected as the blank group. The rats in the EA group were treated with EA at bilateral "Pishu" (BL 20), "Weiwanxiashu" (EX-B 3), "Zusanli" (ST 36) and "Sanyinjiao" (SP 6), with continuous wave, 15 Hz in frequency, and 2 mA in intensity. The electric stimulation lasted 20 min each time. EA was delivered once daily, 6 times a week for 4 weeks. Separately, the levels of fasting blood glucose (FBG) was measured before modeling, before and after intervention, and the body mass of each rat was weighted before and after intervention. After intervention, the levels of the total cholesterol (TC), triacylglycerol (TG) and free fatty acid (FFA) in serum were detected using enzyme colorimetric method; and the levels of the serum insulin (INS) and ZAG were detected by ELISA. Besides, the insulin sensitivity index (HOMA-ISI) was calculated. With Western blot technique adopted, the protein expressions of ZAG and GLUT4 in the femoral quadriceps and adipose tissue were determined.@*RESULTS@#After intervention, compared with the blank group, the levels of FBG and body mass, and the levels of serum TC, TG, FFA and INS increased (P<0.01), while HOMA-ISI decreased (P<0.01); the level of ZAG in the serum and the protein expressions of ZAG and GLUT4 in the femoral quadriceps and adipose tissue dropped (P<0.01) in the model group. In the EA group, compared with the model group, the levels of FBG and body mass, and the levels of serum TC, TG, FFA and INS were reduced (P<0.01), and HOMA-ISI increased (P<0.01); the level of ZAG in the serum and the protein expressions of ZAG and GLUT4 in the femoral quadriceps and adipose tissue increased (P<0.01, P<0.05).@*CONCLUSIONS@#Electroacupuncture can effectively regulate glucose-lipid metabolism, improve insulin resistance and sensitivity in the rats with T2DM, which is associated with the modulation of ZAG and GLUT4 expression in the skeletal muscle and adipose tissue.

Effect of zinc and probiotics supplementation on IL-6 and tissue neutrophil levels in rats exposed to cigarette smoke

@#Introduction: Cigarette smoke exposure can cause inflammation, inducing the release of acute phase cytokines, such as IL-6, that will then trigger the recruitment of neutrophils, which are mostly phagocytic cells. Zinc and probiotics are known to have beneficial effects against inflammation. This study was conducted to investigate the effect of zinc and probiotics supplementation on IL-6 and tissue neutrophil levels in rats exposed to cigarette smoke. Methods: In a randomised, experimental study with post-test control group design, thirty 2 to 3-month-old male Wistar rats, each weighing 180-220 g, were divided into five groups: control group without treatment (C); exposed to cigarette smoke [C (-)]; exposed to cigarette smoke and received zinc (Z); exposed to cigarette smoke and received probiotics (P); and exposed to cigarette smoke and received a combination of zinc and probiotics (ZP). Results: Mean tissue neutrophil levels in Z, P, and ZP groups were 43.43±2.01, 34.67±1.32,and 29.77±5.05 cells, respectively. There were significant differences between supplementation intake and tissue neutrophil levels in each group compared to C (-) group (p<0.05). Meanwhile, only IL-6 level in the ZP group (6.02 pg/mL) decreased significantly compared to C (-) group (10.61 pg/mL). Conclusion: These results suggest that a combination of zinc and probiotics have an anti-inflammatory effect as measured by IL-6 and neutrophil levels.

Hematopoietic regulation of transcription factor GATA1 and mutations causing hereditary erythroid and megakaryocytic disorders / 中国输血杂志

GATA-binding protein 1 (GATA1), an important hematopoietic transcription factor, specifically regulates the proliferation and differentiation of erythroid and megakaryoid cells at the transcription level, which maintains the normal development and maturation of these two lineages. The functional structure of GATA1 is composed of one N-terminal transactivation domain (N-TAD) and two zinc fingers (NF and CF). GATA1 is highly conserved in different species. Alteration of GATA1 expression or function will lead to transcriptional disorder of erythrocyte and megakaryocyte related genes, resulting in various clinical phenotypes. This article reviews the molecular structure of GATA1, its transcriptional regulation in erythrocyte and megakaryocyte, and the hereditary hematopoietic regulatory disorders of these two lineages caused by GATA1 mutations.