O pH da região vulvar no ciclo vital: revisão de escopo / The pH of the vulvar region in the life cycle: scoping review / El pH de la región vulvar en el ciclo vital: revisión del alcance

Introdução: mapear os estudos que mensuraram o potencial Hidrogeniônico (pH) da região vulvar no ciclo vital da mulher. Métodos: revisão de escopo conforme recomendações do Manual for Evidence Synthesis do Joanna Briggs Institute (JBI), nas bases SCOPUS, Web of Science, Academic Search Premier, PubMed, Bielefeld Academic Search Engine e Google Acadêmico em janeiro de 2022. Foram incluídos estudos publicados em português, espanhol, francês e inglês, sem limite temporal. Resultados: dos 954 documentos recuperados, 13 foram selecionados. Apurou- se que os estudos utilizaram diferentes procedimentos para as medições quanto aos equipamentos, ambiente e preparo das participantes. A média de idade apresentada pela população feminina estudada variou entre 31 e 43 anos. Os locais de medição vulvar foram os grandes e pequenos lábios, dobra interlabial e períneo. O menor valor do pH aferido foi 4,6 e o maior 6,3. Conclusões: constatou-se baixa produção de estudos acerca do pH vulvar e ênfase das pesquisas na população de mulheres adultas. A diversidade de procedimentos e locais de aferição encontrados não permite afirmações seguras sobre uma faixa de valor de pH da superfície da pele vulvar.

Introduction: to map the studies that measured the Potential of Hydrogen (pH) of the vulvar region in women's life cycle. Methods: scoping review according to recommendations from the Joanna Briggs Institute (JBI) Manual for Evidence Synthesis in the SCOPUS, Web of Science, Academic Search Premier, PubMed, Bielefeld Academic Search Engine and Google Scholar databases in January 2022. Studies published in Portuguese, Spanish, French, and English, without time limit, were included. Results: of the 954 documents retrieved, 13 were selected. Different measurement procedures in relation to equipment, environment and preparation of participants were used in the studies. The average age of the female population ranged between 31 and 43 years. The vulvar measurement sites were the labia majora and minora, interlabial sulci and perineum. The lowest pH value measured was 4.6 and the highest was 6.3. Conclusions: there was a low production of studies on vulvar pH and an emphasis of studies on the population of adult women. The diversity of procedures and measurement sites found does not allow for safe statements about a range of pH values on the surface of the vulvar skin.

Introducción: mapear los estudios que midieron el Potencial de Hidrógeno (pH) de la región vulvar en el ciclo vital de las mujeres. Métodos: revisión del alcance según las recomendaciones del Manual for Evidence Synthesis del Joanna Briggs Institute (JBI), en las bases de datos SCOPUS, Web of Science, Academic Search Premier, PubMed, Bielefeld Academic Search Engine y Google Scholar en enero de 2022. Se incluyeron estudios publicados. en portugués, español, francés e inglés, sin límite de tiempo. Resultados: de los 954 documentos recuperados, se seleccionaron 13. En los estudios se utilizaron diferentes procedimientos de medición en relación con el equipo, el entorno y la preparación de los participantes. La edad media de la población femenina osciló entre 31 y 43 años. Los sitios de medición vulvar fueron los labios mayores y menores, el pliegue interlabial y el perineo. El valor de pH más bajo medido fue 4,6 y el más alto fue 6,3. Conclusiones: hubo una baja producción de estudios sobre pH vulvar y un énfasis de estudios en población de mujeres adultas. La diversidad de procedimientos y sitios de medición encontrados no permite realizar afirmaciones seguras sobre un rango de valores de pH en la superficie de la piel vulvar.

Analysis of pH, calcium ion release, and energy dispersive spectroscopy of a bioceramic root canal dressing

Abstract This study compared the pH and calcium ion release of calcium silicate- (Bio-C Temp) and calcium hydroxide-based (Ultracal XS) medications. Intracanal remnants of both medications were also evaluated using SEM-EDS after the removal protocol. Thirty-five bovine teeth were prepared. Fifteen were filled with Bio-C Temp and 15 with Ultracal XS. Five remained without intracanal medication (control group). Five samples from each experimental time (i.e.. 24, 72, and 168 hours) were used to measure pH and calcium ions release using a digital pH meter and microplate reader, respectively. Afterward, the peaks of the chemical elements composing both medications were analyzed in SEM-EDS. One-way ANOVA and Tukey's post hoc test analyzed the pH and calcium ion release data. Student's t-test compared the medications in each experimental time. SEM-EDS described the percentage of chemical elements in the samples. Bio-C Temp and Ultracal XS showed a significant pH increase from 24 to 168 hours (p<0.05). Ultracal XS showed a higher pH value at 24 hours than Bio-C Temp (p<0.05) but were similar at 72 and 168h (p > 0.05). Calcium ion release did not depend on the experimental period (p > 0.05). Bio-C Temp showed lower calcium ions release than Ultracal XS at 24 hours (p<0.05). SEM-EDS analyses showed the remains of both medications, but the concentration of Si, Al, and W ions was present only in the calcium silicate-based medication. Bio-C Temp presented alkaline pH and a satisfactory calcium ion release over the time. The remaining of both medications were present after the protocols for paste removal.

Resumo Este estudo comparou o pH e a liberação de íons cálcio de medicações intracanais a à base de silicato de cálcio (Bio-C Temp) e à base de hidróxido de cálcio (Ultracal XS). Remanescentes de ambas as medicações também foram avaliados usando microscopia eletrônica de varredura e espectroscopia de dispersão de energia após o protocolo de remoção. Trinta e cinco dentes bovinos foram preparados. Quinze dentes foram preenchidos com Bio-C Temp e 15 com Ultracal XS. Cinco permaneceram sem medicação intracanal (grupo controle). Cinco amostras de cada tempo experimental (ou seja, 24, 72 e 168 horas) foram usadas para medir o pH e a liberação de íons de cálcio usando um medidor de pH digital e um leitor de microplacas, respectivamente. Em seguida, os picos dos elementos químicos que compõem os dois medicamentos foram analisados ​​em microscopia eletrônica de varredura e por espectroscopia de dispersão de energia. Os testes One-way ANOVA e post hoc de Tukey analisaram os dados de pH e liberação de íons cálcio. O teste t de Student comparou as medicações em cada tempo experimental. A microscopia eletrônica de varredura e a espectroscopia de dispersão de energia descreveu a porcentagem de elementos químicos nas amostras. O Bio-C Temp e o Ultracal XS mostraram um aumento significativo de pH de 24 a 168 horas (p<0,05). O Ultracal XS apresentou um valor de pH mais alto em 24 horas do que o Bio-C Temp (p<0,05), mas foi semelhante em 72 e 168h (p > 0,05). A liberação de íons cálcio não dependeu do período experimental (p> 0,05). O Bio-C Temp apresentou menor liberação de íons de cálcio do que Ultracal XS em 24 horas (p<0,05). As análises de microscopia eletrônica de varredura e espectroscopia de dispersão de energia mostraram remanescentes de ambas as medicações, mas a concentração de íons Si, Al e W estavam presentes apenas na medicação à base de silicato de cálcio. O Bio-C Temp apresentou pH alcalino e maior liberação de íons cálcio. Remanescentes de ambas as medicações estiveram presentes após os protocolos de remoção da pasta.

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 Salt Ions, Polyethylene Glycol and Force on Twisted Structure of Double DNAs / 医用生物力学

Objective To investigate the effects of different salt ion concentration, polyethylene glycol (PEG) and force on structure of double DNAs braids. Methods Taking the 10 kb DNA as the research object, the effects of different concentrations of salt ions(Na+, K+, Mg2+), PEG and different forces on variation of relative extension of twisted double DNAs with rotation turns were investigated by flow chamber experiment of magnetic tweezers. Results The structure of double DNAs braids was sensitive to salt ion concentration but insensitive to PEG. With the increase of ion concentration, the extension of braids changed more gently with the rotation turns, and the electrostatic shielding saturation concentration of Mg 2+ was much lower than that of the monovalent cation. The effect of crowded environment on DNA was mainly the compression of contour length. The twisted structure of DNA was more stable under high force (above 4 pN), and fluctuated greatly under low force (lower than 2 pN). Conclusions The braiding structure and mechanical properties of DNA are affected by ion concentration in the solution and forces. The results may help to elucidate the mechanism of chromatin torsional torque affected by solution environment, and provide references for the function of topoisomerase under different solution conditions.

Light-curing of calcium hydroxide-based liners: pH analysis and calcium ion release / Fotoativação de forradores a base de hidróxido de cálcio: análise de pH e liberação de íons cálcio

Objective: Compare the pH values and calcium ion release of calcium hydroxide-based liner materials before and after light-curing. Material and Methods: The materials evaluated were: hydrox-cal white (HW), hydrox-cal dentin (HD), Biocal (BC) and UltraBlend Plus (UB). 120 samples of the liner materials were inserted into a PVC tube (n=15). The samples from HW+A, HD+A, BC+A and UB+A were subjected to photoactivation. The other groups HW+N, HD+N, BC+N and UB+N were only inserted in a glass tube with deionized water. The pH was measured 24 hours and 14 days after the inclusion of the samples with the aid of a pH meter. The calcium release was analyzed with the aid of an atomic absorption spectophotometer at 24h and 14 days. The results were submitted to the Shapiro-Wilk test, followed by ANOVA and Tukey test (p=0.05). Results: In 24h, the groups that were not light cured showed the highest pH values (p<0.05). In 14 days, BC+N and BC+A demonstrated the lowest pH values. The groups that were not light cured also showed higher calcium release values in 24h and 14 days (p<0.05). Conclusion: Photoactivation of calcium hydroxide-based liner materials negatively interferes with calcium ion release, as well as with pH.(AU)

Objetivo: Comparar os valores de pH e liberação de íons cálcio de materiais forradores à base de hidróxido de cálcio antes e depois da fotopolimerização. Material e métodos: Os materiais avaliados foram: Hidrox-cal branco (HW), Hidrox-cal dentina (HD), Biocal (BC) e UltraBlend Plus (UB). 120 amostras dos materiais de revestimento foram inseridas em um tubo de PVC (n=15). As amostras de HW +A, HD+A, BC+A e UB+A foram submetidas à fotoativação. Os demais grupos HW +N, HD+N, BC+N e UB+N foram inseridos apenas em um tubo de vidro com água deionizada. O pH foi medido 24 horas e 14 dias após a inclusão das amostras com o auxílio de um medidor de pH. A liberação de cálcio foi analisada com o auxílio de um espectrofotômetro de absorção atômica em 24h e 14 dias. Os resultados foram submetidos ao teste de Shapiro-Wilk, seguido de ANOVA e teste de Tukey (p=0,05). Resultados: Em 24h, os grupos não fotopolimerizados apresentaram os maiores valores de pH (p<0,05). Em 14 dias, BC+N e BC+A apresentaram os menores valores de pH. Os grupos não fotopolimerizados também apresentaram maiores valores de liberação de cálcio em 24h e 14 dias (p<0,05). Conclusão: A fotoativação de materiais de revestimento à base de hidróxido de cálcio interfere negativamente na liberação de íons cálcio e no pH (AU)

Metal ion release according to leg length discrepancy in ceramic-on-metal hip arthroplasty / Liberação de íons metálicos segundo discrepância no comprimento da perna após artroplastia metal-cerâmica total de quadril

ABSTRACT Objective The ceramic-on-metal (CoM) bearing has the theoretical advantages over ceramic-on-ceramic (CoC) and metal-on-metal bearings. This study aimed to analyze factors affecting the metal ion release of CoM bearings and compare clinical performance with CoC bearings. Methods The 147 patients were divided into 96 patients in group 1 (CoM group) and 51 patients in group 2 (CoC group). Additionally, within group1, 48 patients and 30 patients were sub-categorized into group 1-A with leg length discrepancy (LLD) less than 1cm and group 1-B greater than 1 cm. The level of serum metal ions, functional scores and plain radiographs were obtained for the analysis. Results The level of cobalt (Co) 2-years after surgery and chromium (Cr) 1-year after surgery showed significantly higher in the group1 than the group2. LLD indicated statistically significant positive correlation between serum metal ion levels among CoM bearing THAs. In comparison of the average metal ions level changes, group 1-B showed higher level of metal ion than group 1-A. Conclusion In patients underwent THA with CoM bearings, large LLD have a higher risk of complications associated to metal ions. Therefore, it is critical to reduce the LLD to 1 cm or less in using CoM bearing. Level of Evidence III; Case Control Study.

RESUMO Objetivo Uma superfície metalocerâmica (CoM) apresenta vantagens teóricas sobre as superfícies cerâmica-cerâmica (CoC) e metal-metal. Este estudo teve como objetivo analisar os fatores que afetam a liberação de íons metálicos das superfícies CoM e comparar o desempenho clínico com as superfícies CoC. Métodos Os 147 pacientes foram divididos em 96 pacientes no grupo 1 (grupo CoM) e 51 pacientes no grupo 2 (grupo CoC). No grupo 1, 48 pacientes foram subcategorizados em grupo 1-A, com discrepância de comprimento das pernas (LLD) menor que 1 cm; e 30 pacientes no grupo1-B maior que 1 cm. O nível de íons metálicos séricos, escores funcionais e radiografias foram obtidas para a análise. Resultados Os níveis de cobalto (Co) 2 anos após a cirurgia e de cromo (Cr), após o primeiro ano da cirurgia mostraram-se significativamente mais altos no grupo 1 do que no grupo 2. A LLD indicou correlação positiva estatisticamente significativa entre os níveis de íons do soro metálico entre os portadores de THA de CoM. Em comparação com as alterações médias dos níveis de íons metálicos, o grupo 1-B revelou um nível de íons metálicos mais alto do que o grupo 1-A. Conclusão Em pacientes submetidos a THA com superfícies CoM e elevada LLD têm um maior risco de complicações associadas a íons metálicos. Sendo fundamental reduzir LLD para 1 cm ou menos no uso de superfícies CoM. Nível de Evidência III; Estudo de Controle de Caso.

Analysis of eight Murraya species by flow injection-Qtrap-mass spectrometry / 药学学报

In this study, the flow injection (FI) technology combined with the unique step wise multiple ions monitoring scanning (step-wise MIM) mode of Qtrap-MS was first established for the identification and discrimination of eight Murraya species. It only takes 5 min for each sample to detect approximate 600 compounds. The characteristic MS chromatograms of eight Murraya plants were analyzed by Analyst and SIMCA-P. The results of PCA showed that sect. Murraya and sect. Bergera were clearly divided into two categories, suggesting that there is difference in the chemical compositions between these two groups. Further detail analysis of the MS data could realize the preliminary structure elucidation of the component types contained in different plants. The main components in M. exotica and M. alata are coumarins, and polymethoxyflavones are rich in M. paniculata, while carbazole alkaloids are the major ones in sect. Bergera plants. The results are consistent with our previous comprehensive analysis of the chemical components of Murraya species. In conclusion, our research confirmed that FI-Qtrap-MS technology can be used for rapid identification and differentiation of similar plant species, providing reference for chemical taxonomy and a new method for the quality evaluation of medicinal materials.

Erosive potential associated with the pH of industrialized and natural drinks

Nowadays there is an increase in the consumption of acidic drinks, especially the fermented ones. Its ingestion is closely associated with the demineralization of superficial dental tissues, which characterizes dental erosion. The objective of this study was to evaluate the pH of industrialized and natural drinks. The sample consisted of soft drinks, natural and artificial juices, fermented drinks, isotonic drinks and energy from different commercial brands acquired in the city of Niterói (RJ). The products were kept at room temperature (25oC) for 1 hour and were aliquoted 3 mL of each drink to a Becker to measure pH in a specific electrode coupled to a potentiometer. The readings were performed in triplicate. The mean pH ranged from 2.34 to 4.31, the most acidic drink was the refrigerant and the less acidic, the curd. It was found that all drinks analyzed had an acidic pH. Thus, potentially erosive dental structures.

Atualmente, há um aumento no consumo de bebidas ácidas, especialmente as fermentadas. Sua ingestão está intimamente associada à desmineralização dos tecidos dentários superficiais, o que caracteriza a erosão dentária. O objetivo da presente pesquisa foi avaliar o potencial erosivo de bebidas industrializadas e naturais. A amostra de conveniência foi constituída de refrigerantes, sucos naturais e artificiais, bebidas fermentadas, isotônicos e energéticos de diferentes marcas comerciais adquiridas no município de Niterói (RJ). Os produtos foram mantidos em temperatura ambiente (25oC) durante 1 hora e foram aliquotados 3 mL de cada bebida para um Becker para a mensuração de pH em eletrodo específico acoplado a um potenciômetro. As leituras foram realizadas em triplicata. Os valores médios de pH variaram de 2,34 a 4,31, sendo a bebida mais ácida um refrigerante e a menos ácida, a coalhada. Constatou-se que todas as bebidas analisadas apresentaram um pH ácido e abaixo do crítico para a dissolução do esmalte, sendo estas potencialmente erosivas das estruturas dentárias.

Canales de iones potasio en la dinámica contráctil del músculo liso arterial inducida por Camphenol Plus

RESUMEN Introducción: El Camphenol Plus es un derivado clorofenólico empleado como medicación intraconducto durante los tratamientos pulporradiculares en Estomatología. Son escasos los reportes científicos sobre el papel de los canales de iones potasio en la dinámica contráctil del músculo liso arterial inducida por dicho medicamento. Objetivo: Determinar el papel de los canales de iones potasio en la dinámica contráctil del músculo liso arterial inducida por Camphenol Plus. Método: Se realizó una investigación experimental preclínica en el Instituto de Fisiología "Oscar Langerdorff", Facultad de Medicina, Universidad de Rostock, Alemania, entre octubre y diciembre de 2018, con el empleo de 30 anillos de aorta obtenidos de 10 ratas Wistar (n=10). Las preparaciones biológicas se colocaron en baño de órganos y se preactivaron con solución Krebs concentrada en iones potasio, registrándose luego la tensión desarrollada por el músculo liso vascular tras la adición de soluciones de Camphenol Plus durante diferentes intervalos de tiempo. Se utilizaron las pruebas de Wilcoxon y U de Mann-Whitney. Resultados: El 31,4 % de la musculatura lisa vascular se relajó por acción del Camphenol Plus tras la preactivación con solución Krebs concentrada en iones potasio. El mayor descenso del tono vascular se produjo con el uso de soluciones del medicamento al 7 % entre el primer y tercer minutos. Conclusiones : El efecto vasorrelajante in vitro producido por Camphenol Plus sobre el músculo liso arterial está mediado por canales de iones potasio sensibles a voltaje, a calcio y a trifosfato de adenosina del endotelio vascular y el sarcolema.

ABSTRACT Introduction: Camphenol Plus is a chlorophenolic derivative commonly used as an intra - duct medication for pulporadicular treatments in Dentistry. Scientific reports about the use of this medication on the role of potassium ion channels in the contractile dynamics of induced arterial smooth muscle are low. Objective: To determine the role of potassium ion channels in the contractile dynamics of Camphenol Plus - induced arterial smooth muscle. Method: A preclinical experimental investigation was performed at the "Oscar Langerdorff" Institute of Physiology, Rostock University Medical Center, Rostock, Germany, between October and December 2018. A total of 30 aortic rings obtained from 10 Wistar rats (n=10) were used. The biological preparations were placed in an organ bath and preactivated with Krebs solution concentrated in potassium ions, afterwards it was recorded the tension developed by the vascular smooth muscle after applying the Camphenol Plus solutions in different time intervals. The Mann-Whitney U test and Wilcoxon test were applied. Results: The 31.4% of vascular smooth muscle was relaxed by the effect of Camphenol Plus after preactivation with Krebs solution concentrated in potassium ions. The greatest decrease in vascular tone occurred between the first and third minutes after the use of the drug solutions prepared at 7 %. Conclusions: The in vitro vasorelaxant effect produced by the Camphenol Plus medication on arterial smooth muscle is mediated by the potassium ion channels sensitive to voltage, calcium and the adenosine triphosphate of the vascular endothelium and sarcolemma.

RESUMO Introdução: Camphenol Plus é um derivado clorofenólico utilizado como medicação intracanal durante tratamentos pulporradiculares em Estomatologia. Existem poucos relatos científicos sobre o papel dos canais iônicos de potássio na dinâmica contrátil do músculo liso arterial induzida pela referida droga. Objetivo: Determinar o papel dos canais iônicos de potássio na dinâmica contrátil do músculo liso arterial induzida por Camphenol Plus. Método: Uma investigação experimental pré-clínica foi realizada no Instituto de Fisiologia "Oscar Langerdorff" da Faculdade de Medicina da Universidade de Rostock, Alemanha, entre outubro e dezembro de 2018, utilizando 30 anéis aórticos obtidos de 10 ratos Wistar (n=10). As preparações biológicas foram colocadas em banho de órgãos e pré-ativadas com solução de Krebs concentrada em íons potássio, registrando-se então a tensão desenvolvida pelo músculo liso vascular após a adição de soluções de Camphenol Plus em diferentes intervalos de tempo. Foram utilizados os testes U de Wilcoxon e Mann-Whitney. Resultados: 31,4% da musculatura lisa vascular relaxada pela ação do Camphenol Plus após pré-ativação com solução de Krebs concentrada em íons potássio. A maior diminuição do tônus vascular ocorreu com o uso de soluções medicamentosas a 7% entre o primeiro e o terceiro minutos. Conclusões: O efeito vasorrelaxante in vitro produzido pelo Camphenol Plus no músculo liso arterial é mediado por canais de íons de potássio sensíveis à voltagem, trifosfato de cálcio e adenosina do endotélio vascular e do sarcolema.

Carbon ion ( 12C 6+) inhibits JAK2/STAT3 pathway and promotes CD8 + T cell infiltration in lung cancer / 中华放射肿瘤学杂志

Objective:To explore the alteration of JAK2/STAT3 pathway after carbon ion ( 12C 6+) irradiation and the difference in the infiltration of CD8 + T cells in lung cancer regulated by downstream protein FOXP3. Methods:Significantly altered JAK2/STAT3 pathway and related differentially-expressed genes and proteins such as FOXP3 in lung cancer after carbon ion irradiation were screened based on RNA sequencing analysis in the Lewis tumor model of C57BL/6 mice. The correlation between FOXP3 and major immune cell infiltration in the immune microenvironment of lung cancer was analyzed using the ssGSEA immune infiltration algorithm in the R software "GSVA" and CD8 + T cell infiltration in the immune microenvironment of lung cancer was evaluated based on the carbon ion combined with STAT3 inhibition pathway (niclosamide). Results:The JAK2/STAT3 pathway was inhibited and the expression of related genes and proteins was downregulated in lung cancer after carbon ion irradiation. Immune scoring based on the ssGSEA algorithm showed that FOXP3 expression was significantly negatively correlated with CD8 + T cell infiltration in the immune microenvironment of lung cancer. The role of targeting the JAK2/STAT3 pathway in increasing CD8 + T cell infiltration in lung cancer was further clarified by carbon ion irradiation combined with STAT3 inhibition (niclosamide). Conclusion:Carbon ion irradiation ( 12C 6+) can play a synergistic role with immunotherapy by targeting the JAK2/STAT3 pathway.

IRE1α deficiency impairs autophagy in chondrocytes by upregulating calcium homeostasis endoplasmic reticulum protein / 南方医科大学学报

OBJECTIVE@#To explore the mechanism by which inositol-requiring enzyme-1α (IRE1α) regulates autophagy function of chondrocytes through calcium homeostasis endoplasmic reticulum protein (CHERP).@*METHODS@#Cultured human chondrocytes (C28/I2 cells) were treated with tunicamycin, 4μ8c, rapamycin, or both 4μ8c and rapamycin, and the expressions of endoplasmic reticulum (ER) stress- and autophagy-related proteins were detected with Western blotting. Primary chondrocytes from ERN1 knockout (ERN1 CKO) mice and wild-type mice were examined for ATG5 and ATG7 mRNA expressions, IRE1α and p-IRE1α protein expressions, and intracellular calcium ion content using qPCR, Western blotting and flow cytometry. The effect of bafilomycin A1 treatment on LC3 Ⅱ/LC3 Ⅰ ratio in the isolated chondrocytes was assessed with Western blotting. Changes in autophagic flux of the chondrocytes in response to rapamycin treatment were detected using autophagy dual fluorescent virus. The changes in autophagy level in C28/I2 cells overexpressing CHERP and IRE1α were detected using immunofluorescence assay.@*RESULTS@#Tunicamycin treatment significantly up-regulated ER stress-related proteins and LC3 Ⅱ/LC3 Ⅰ ratio and down-regulated the expression of p62 in C28/I2 cells (P < 0.05). Rapamycin obviously up-regulated LC3 Ⅱ/LC3 Ⅰ ratio (P < 0.001) in C28/I2 cells, but this effect was significantly attenuated by co-treatment with 4μ8c (P < 0.05). Compared with the cells from the wild-type mice, the primary chondrocytes from ERN1 knockout mice showed significantly down-regulated mRNA levels of ERN1 (P < 0.01), ATG5 (P < 0.001) and ATG7 (P < 0.001), lowered or even lost expressions of IRE1α and p-IRE1α proteins (PP < 0.01), and increased expression of CHERP (P < 0.05) and intracellular calcium ion content (P < 0.001). Bafilomycin A1 treatment obviously increased LC3 Ⅱ/ LC3 Ⅰ ratio in the chondrocytes from both wild-type and ERN1 knockout mice (P < 0.01 or 0.05), but the increment was more obvious in the wild-type chondrocytes (P < 0.05). Treatment with autophagy dual-fluorescence virus resulted in a significantly greater fluorescence intensity of LC3-GFP in rapamycin-treated ERN1 CKO chondrocytes than in wild-type chondrocytes (P < 0.05). In C28/I2 cells, overexpression of CHERP obviously decreased the fluorescence intensity of LC3, and overexpression of IRE1α enhanced the fluorescence intensity and partially rescued the fluorescence reduction of LC3 caused by CHERP.@*CONCLUSION@#IRE1α deficiency impairs autophagy in chondrocytes by upregulating CHERP and increasing intracellular calcium ion content.

The Salivary Concentration of Chemical Elements in Response to Training Loads in Brazilian Jiu-Jitsu Athletes / Concentração Salivar de Elementos Químicos em Resposta a Cargas de Treinamento em Atletas de Brazilian Jiu-Jitsu

The saliva analysis by Total Reflection X-Ray Fluorescence (TXRF) for monitoring training loads could be useful due to the ease of sample analysis and a large range of chemical elements can be detected. Twelve BJJ athletes were submitted to 7 weeks of training scheduled with high training loads (weeks 1 to 4) and tapering (weeks 5 to 7). Saliva samples were collected before (Pre), at week 4, and at week 8 (Post), to quantify chemical element concentrations by TXRF. The internal training load was monitored using the session rating of perceived exertion of session (RPE) method for physical and technical tactical training sessions. All the saliva samples presented Phosphorus (P), Sulfur (S), Chlorine (Cl), Potassium (K), Calcium (Ca), Zinc (Zn), Bromine (Br), and Rubidium (Rb) at Pre, 4 weeks and Post time points. Salivary concentrations of Cl, K, Manganese (Mn), Copper (Cu), Br, and Rb significantly decreased in 4 weeks (p<0.05); and K, Cu, and Rb concentration remained at low levels at Post (p<0.05). Medium to large Cohen´s effect sizes for decrements in element concentrations from Pre to 4 weeks was observed for all the elements except Zn. Reduced S concentration at 4 weeks was negatively correlated to high training load period (r=-0.56, p=0.05). The results suggest that BJJ training modulates salivary electrolyte composition and salivary P, S and Rb are correlated with training loads in BJJ athletes. (AU)

A análise de saliva por meio de Fluorescência de Raios-X de Reflexão Total (TXRF) para monitorar cargas de treinamento pode ser útil devido à facilidade de análise da amostra e a ampla variedade de elementos químicos detectados. Doze atletas de BJJ foram submetidos a 7 semanas de treinamento programado com altas cargas de treinamento (semanas 1 a 4) e polimento (semanas 5 a 7). Amostras de saliva foram coletadas antes (Pré), na semana 4 (Meio) e na semana 8 (Pós), para quantificar as concentrações dos elementos químicos por TXRF. A carga interna de treinamento foi monitorada por meio do método de percepção subjetiva de esforço da sessão (PSE) nas sessões de treinamento físico e técnico-tático. Todas as amostras de saliva apresentaram Fósforo (P), Enxofre (S), Cloro (Cl), Potássio (K), Cálcio (Ca), Zinco (Zn), Bromo (Br) e Rubídio (Rb) no momento Pré, 4 semanas e Pós. As concentrações salivares de Cl, K, Manganês (Mn), Cobre (Cu), Br e Rb diminuíram significativamente em 4 semanas (p <0,05); e a concentração de K, Cu e Rb permaneceram em níveis baixos no Pós (p <0,05). Os tamanhos de efeito de Cohen médio a grande para decréscimos nas concentrações de elementos, de Pré a 4 semanas, foram observados para todos os elementos, exceto para Zn. A redução da concentração de S em 4 semanas foi negativamente correlacionada com o período de alta carga de treinamento (r = -0,56, p = 0,05). Os resultados sugerem que o treinamento de BJJ modula a composição eletrolítica salivar e o P, S e Rb salivares estão correlacionados com as cargas de treinamento no BJJ. (AU)

Investigação do potencial erosivo de gomas de mascar não convencionais / Investigation the erosive potential of unconventional chewing gums

Objetivo: mensurar o potencial erosivo de gomas de mascar não convencionais disponíveis no mercado brasileiro. Material e método: estudo experimental (in vitro) de caráter quantitativo. Foram adquiridos oito sabores de gomas de mascar: Poosh® (pinta língua); Plutonita® (abraço congelante, dentada ardente, baba de bruxa e língua ácida); e TNT® (sangue, lava e tumba). Para análise da acidez, foram realizadas leituras em triplicata do pH e acidez titulável (AT), utilizando um potenciômetro e eletrodo combinado de vidro em soluções obtidas após a maceração das gomas de mascar em água duplamente deionizada. Nas soluções com valores de pH inferiores a 5,5, foi mensurada a AT adicionando-se alíquotas de 100 µLNaOH 0,1 M, até alcançar pH 5,5. Os resultados foram submetidos à Análise de Variância (ANOVA). As comparações das médias de pH e acidez titulável foram realizadas pelo teste de Tukey, com um nível de 5% de significância (p<0,05). Resultados: os valores de pH variaram entre 2,4 (abraço congelante) e 3,5 (baba de bruxa), diferin-do significantemente do controle (água mineral/pH=6,2). Os valores de acidez titulável variaram entre 628µL de NaOH 0,1 M (sangue) e 10700µL de NaOH 0,1 M (abraço congelante). A goma de mascar sabor abraço congelante apresentou o pH mais baixo e a mais elevada acidez titulável, diferindo significantemente dos demais sabores. Conclusões: as gomas de mascar avaliadas são ácidas, mas diferem quanto ao seu potencial erosivo. Seu consumo abusivo pode constituir um fator de risco para erosão dental.(AU)

Objective: to measure the erosive potential of non- -conventional chewing gums available in the Brazilian market. Material and methods: this is an in vitro study using the following flavors of chewing gums from the Brazilian market: Poosh® (tongue cleaner); Plutonita® (freezing hug, burning bite, witch slime and acid tongue); TNT® (blood, lava and tomb). For acidity analysis, pH and titratable acidity (TA) readings were performed in triplicate using a potentiometer and combined glass electrode in solutions obtained after maceration of the chewing gums in double deionized water. In solutions with pH values below 5.5, the TA was measured by adding aliquots of 100 µL 0.1 M NaOH, until pH 5.5 was reached. The results were submitted to Analysis of Variance (ANOVA). Comparisons of pH and titratable acidity means were performed by Tukey test at a 5% significance level (p<0.05). Results: the pH values that ranged from 2.4 (freezing hug) to 3.5 (witch's slime) differed significantly from the control (mineral water/ pH=6.2). Titratable acidity values ranged from 628µL of 0.1 M NaOH (blood) to 10700µL of 0.1 M NaOH (freezing hug). The freezing hug flavor chewing gum had the lowest pH and the highest titratable acidity differing significantly from the other flavors. Conclusions: the evaluated chewing gums are acidic, but differ in their erosive potential. Their abusive consumption may constitute a risk factor for dental erosion.(AU)

Cytotoxicity and Elemental Release of Dental Acrylic Resin Modified with Silver and Vanadium Based Antimicrobial Nanomaterial / Citotoxicidade e Liberação Elementar de Resina Acrílica Odontológica Modificada com Nanomaterial Antimicrobiano a Base de Prata e Vanádio

The acrylic resin used for the prosthesis base accumulates biofilm, causing diseases such as stomatitis. The addition of some nanoparticles promotes antimicrobial action. This study incorporated the nanostructured silver vanadate decorated with silver nanoparticles (AgVO3) to the acrylic resin by two methods and evaluated the cytotoxicity for human gingival fibroblasts (HGF) and the released silver and vanadium ions. The concentrations of 0.5, 1, 2.5, and 5% of AgVO3 was incorporated by vacuum spatulation and polymeric film. The vacuum spatulation was performed for 60 s using the Turbomix equipment, and the polymeric film was obtained from the polymer solubilization in chloroform, the film was subjected to a cryogenic grinding, and the powder obtained was manually mixed at the monomer. HGF cell viability was assessed after 24 hours, 7 and 14 days by the MTT assay. The release of silver (Ag) and vanadium (V) ions were quantified by inductively coupled plasma mass spectrometry after 30 days. Kruskal-Wallis and Dunn's test were applied (α = 0.05). The HGF viability was inversely proportional to the incubation time. Both incorporation techniques and the negative and positive control groups presented significant statistical differences (p<0.05). The experimental groups presented no statistical difference compared to the negative control (p>0.05), except the vacuum spatulation group with 5% of AgVO3 that showed greater viability than the negative control (p=0.013) in 24 hours. The release of Ag and V ions was proportional to the concentration of AgVO3 The 5% group presented a significant difference compared to the other groups (p<0.05). In conclusion, the acrylic resin with and without the AgVO3 incorporation had a small cytotoxic potential for HGF in 24 hours, with a lower viability in longer contact times; the release of Ag and V ions was proportional to the concentration of AgVO3, not influencing cell viability. (AU)

A resina acrílica utilizada para a base da prótese acumula biofilme, causando doenças como a estomatite. A adição de algumas nanopartículas promove ação antimicrobiana. Este estudo incorporou o vanadato de prata nanoestruturado decorado com nanopartículas de prata (AgVO3) à resina acrílica por dois métodos e avaliou a citotoxicidade para fibroblastos gengivais humanos (HGF) e os íons prata e vanádio liberados. As concentrações de 0,5%, 1%, 2,5% e 5% de AgVO3 foram incorporadas por espatulação a vácuo e filme polimérico. A espatulação a vácuo foi realizada por 60 s no equipamento Turbomix, e o filme polimérico foi obtido a partir da solubilização do polímero em clorofórmio, o filme foi submetido a uma moagem criogênica e o pó obtido foi misturado manualmente ao monômero. A viabilidade celular de HGF foi avaliada após 24 horas, 7 e 14 dias pelo ensaio de MTT. A liberação de íons prata (Ag) e vanádio (V) foi quantificada por espectrometria de massa com plasma indutivamente acoplado após 30 dias. Os testes de Kruskal-Wallis e Dunn foram aplicados (α=0,05). A viabilidade de HGF foi inversamente proporcional ao tempo de incubação. As técnicas de incorporação e os grupos controle negativo e positivo apresentaram diferença estatisticamente significante (p<0,05). Os grupos experimentais não apresentaram diferença estatística em relação ao controle negativo (p>0,05), exceto o grupo de espatulação a vácuo com 5% de AgVO3 que apresentou maior viabilidade que o controle negativo (p = 0,013) em 24 horas. A liberação de íons Ag e V foi proporcional à concentração de AgVO3. O grupo 5% apresentou diferença significativa em relação aos demais grupos (p <0,05). Em conclusão, a resina acrílica com e sem a incorporação de AgVO3 apresentou um pequeno potencial citotóxico para o HGF em 24 horas, com menor viabilidade nos tempos de maior contato, e a liberação de íons Ag e V foi proporcional à concentração de AgVO3, não influenciando na viabilidade celular. (AU)

Advances in biomimetic modification of materials for oromaxillofacial bone regeneration and dental implant / 华西口腔医学杂志

Oromaxillofacial hard tissue defects is still a difficult problem in clinical treatment. Regeneration of oromaxillofacial hard tissue based on tissue engineering technology has a good clinical application prospect. The functional modification of scaffolds is one of key factors that influence the outcome of tissue regeneration. The biomimetic design of biomaterials through simulating the natural structure and composition of oromaxillofacial hard tissue has gradually become a research hotspot due to its advantages of simplicity and efficiency. In this article, the biomimetic modification of biomaterials for oromaxillofacial hard tissue regeneration is reviewed, expecting to provide a new idea for the treatment of oromaxillofacial hard tissue defect.

Cateteres nasoenterais mal posicionados: relato de casos / Catéteres nasoenterales mal posicionados: informes de casos / Poorly positioned nasoenteral catheters: case reports

RESUMO Objetivo: relatar casos de cateteres nasoenterais mal posicionados, após inserção às cegas à beira leito. Método: são apresentados três casos, os quais ocorreram em uma instituição hospitalar localizada no estado de São Paulo. Os cateteres foram inseridos pelo enfermeiro conforme protocolo institucional, para posicionamento em nível entérico. Ausculta epigástrica e mensuração do pH foram os métodos empregados na confirmação do posicionamento dos cateteres e posteriormente foi realizado o exame de Raios-X, considerado exame de referência para confirmar o posicionamento de cateteres nasoenterais. Resultados: dos três cateteres mal posicionados, dois estavam com a extremidade distal projetada para a junção esofagogástrica e uma não foi visibilizada, apesar de a ausculta ter sido positiva e os valores de pH terem sido superiores a seis. Conclusão: os resultados revelaram importantes limitações de ambos os métodos na verificação do posicionamento de cateteres nasoenterais que foram inseridos recentemente às cegas à beira leito.

RESUMEN Objetivo: reportar casos de catéteres nasoenterales mal posicionados tras inserción ciega a pie de cama. Método: se presentan tres casos, ocurridos en un hospital ubicado en el estado de São Paulo. Los catéteres fueron insertados por el enfermero según protocolo institucional, para su colocación a nivel entérico. La auscultación epigástrica y la medición del pH fueron los métodos utilizados para confirmar la posición de los catéteres y posteriormente se realizó el examen de rayos X, considerado un examen de referencia para confirmar la posición de los catéteres nasoenterales. Resultados: de los tres catéteres mal posicionados, dos tenían el extremo distal proyectado a la unión esofagogástrica y uno no se visualizaba, a pesar de que la auscultación era positiva y los valores de pH superiores a seis. Conclusión: los resultados revelaron importantes limitaciones de ambos métodos para verificar la posición de los catéteres nasoenterales recientemente insertados a ciegas a la cabecera de la cama.

ABSTRACT Objective: to report cases of poorly positioned nasoenteral catheters after blind insertion at the bedside. Method: three cases are presented, which occurred in a hospital located in the state of São Paulo. The catheters were inserted by the nurse according to institutional protocol, for placement at the enteric level. Epigastric auscultation and pH measurement were the methods used to confirm the positioning of the catheters and subsequently the X-Ray exam was performed, considered a reference exam to confirm the positioning of nasoenteral catheters. Results: of the three poorly positioned catheters, two were with the distal end projected to the esophagogastric junction and one was not visualized, despite the auscultation being positive and the pH values being higher than six. Conclusion: the results revealed important limitations of both methods in verifying the positioning of nasoenteral catheters that were recently inserted blindly at the bedside.

The effect of parasitic ions on riboflavin permeability and cross-linking effectiveness in iontophoresis-assisted scleral cross-linking / 生物医学工程学杂志

The effect of parasitic ions on the results of ultraviolet A (UVA) cross-linking in iontophoresis was still not clear. In this work, the porcine sclera was cross-linked by riboflavin lactate Ringer's solution (group A) and riboflavin normal saline (group B)

Overview of metalomics research and its application prospect in mineral Chinese medicine research / 中国中药杂志

Metallomics is a frontier interdisciplinary subject at its vigorous development stage. Its goal is to systematically study the content, distribution, chemical species, structural characteristics and functions of metal elements in biological system. It is also a comprehensive discipline to study the existing state and function of free or complex metal elements in life. Metallomics is an ideal tool to study the biological behavior of inorganic elements, which can be used to solve many problems in the research of mineral Chinese medicine(MCM). It provides a strong theoretical basis and technical support for the research of MCM. Its theory and methods provide re-ference and enlightenment for the in-depth study of MCM, and also provide new ideas and open up new ways for the research of MCM. The application of metallomics theory and methods in the research of MCM is of great significance to reveal the material basis and mec-hanism of MCM, promote the process of basic research on MCM, fully exploit and utilize medicinal mineral resources and carry forward the traditional MCM treasure in China. In this paper, we introduced the concept, academic development, research content and research methods of metallomics, and discussed the application prospects of metallomics in the analysis of inorganic element composition characteristics and quality control, material basis and mechanism of MCM, so as to provide reference for further researches on MCM.

Green Reactants Act As Natural Precursor For Facile Synthesis Of Nanoparticles Using Withania Somnifera

Nanotechnology includes physical and chemical approaches intended for their phytofabrication of metal nanoparticles. Most of the time, these methods are not as safe as these are associated with the utilization of extremely noxious and hazardous substances that produce biological problems. Due to their manifold applications, various biological methods are gaining admiration for the fabrication of silver nanoparticles (AgNPs). The utilization of vegetative parts in the biosynthesis of nanoparticles (NPs) emerges as a commercial and ecological approach. The spectroscopic profile confirms the occurrence of a functional peak at 360 nm. Fourier transform infrared spectroscopy (FTIR) studies indicate that phenol groups are responsible for phytofabrication of NPs. The results of microbicidal screening confirm that broad spectrum of inhibition was found to be observed in 400 μL of biosynthesized AgNP against E. coli (23 mm) and B. cereus (22.3 mm) Therefore, the progress of simple photosynthesis methods avoid deleterious and harmful properties has fascinated major attention in this field.

Identifying hydric, electrolytic and acid-base imbalances through traditional and quantitative approaches in dogs with hemorrhagic gastroenteritis / Identificação de desequilíbrios hídricos, eletrolíticos e ácido-base pelas abordagens tradicional e quantitativa em cães com gastroenterite hemorrágica

Vomiting and diarrhea are two important clinical signs that can cause significant electrolytic and acid-base imbalances. The purposes of this study were to characterize hydric, electrolytic and acid-base disorders presented by puppies with hemorrhagic gastroenteritis and to compare the traditional and quantitative approaches to acid-base status interpretation. Sixty-one animals with a history of vomiting and/or diarrhea were used in this study and the following tests were performed: complete blood count, total plasma protein concentration and hemogasometry. Mean, standard deviation and Kappa values were calculated. The imbalances characterized by both approaches were: 42 (69%) animals without imbalance, 17 (28%) with metabolic alkalosis and 2 (3%) with metabolic acidosis by the traditional approach and 17 (28%) dogs without imbalance, 26 (43%) with metabolic alkalosis and 18 (29%) with metabolic acidosis by the quantitative approach. The agreement calculated between two approaches coincide in 28 cases, with a moderate Kappa value equivalent to 0.459. The most found imbalances were metabolic alkalosis, hypokalemia, and mild dehydration. Most of acid-base disturbances were not identified by the traditional approach, whereas by the quantitative approach, they were easily determined. Thus quantitative approach proved to be superior in identification of possible acid-base imbalances.(AU)

Vômito e diarreia são dois sinais clínicos importantes, que podem causar desequilíbrios eletrolíticos e ácido-base importantes. Os objetivos deste trabalho foram caracterizar os desequilíbrios hídrico, eletrolítico e ácido-base apresentados por filhotes de cães com gastroenterite hemorrágica e comparar as abordagens de interpretação do equilíbrio ácido-base tradicional e quantitativa. Sessenta e um animais com histórico de vômito e/ou diarreia foram utilizados neste estudo, e os seguintes testes foram realizados: hemograma, concentração de proteína total plasmática e hemogasometria. Média, desvio-padrão e valor de Kappa foram calculados. Os desequilíbrios caracterizados pelas duas abordagens foram: 42 (69%) animais sem desequilíbrio, 17 (28%) com alcalose metabólica e dois (3%) com acidose metabólica, pela abordagem tradicional, e 17 (28%) cães sem desequilíbrio, 26 (43%) com alcalose metabólica e 18 (29%) com acidose metabólica, pela abordagem quantitativa. A concordância calculada entre as duas abordagens coincidiu em 28 casos, com um valor de Kappa moderado, equivalente a 0,459. Os desequilíbrios mais encontrados foram alcalose metabólica, hipocalemia e desidratação leve. A maioria dos distúrbios não foram identificados pela abordagem tradicional, enquanto, pela abordagem quantitativa, foram facilmente determinados. Portanto, a abordagem quantitativa provou-se superior na identificação de possíveis desequilíbrios ácido-base.(AU)