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1.
Braz. j. biol ; 79(4): 742-748, Nov. 2019. tab, graf
Article in English | LILACS | ID: biblio-1001482

ABSTRACT

Abstract Citrus fruit production occupies a place of considerable importance in the economy of the world including Pakistan. Tristeza disease caused by Citrus Tristeza Virus (CTV) exists in various forms that may or may not cause symptoms in the plants. The bioactive compounds and antioxidants are naturally present in plants and provide a defense mechanism that is generally accelerated in response to a stress. The objective of the present study was to target and analyze the citrus plants that were CTV positive to observe the changes in the enzymatic and non-enzymatic antioxidants of citrus (Sweet Oranges only). It was observed that in response to CTV infection, both the non-enzymatic antioxidants (total flavonoid, ascorbic acid, phenolic acid) and enzymatic antioxidants (catalase, superoxide dismutase and peroxidase) activities showed an increasing trend overall. The profiling of antioxidants in response to a viral infection may help in the discovery of new biomarkers that can be used as a monitoring tool in disease management.


Resumo As frutas cítricas ocupam um lugar de considerável importância na economia do Paquistão, assim como o resto do mundo. A doença da tristeza causada pelo Vírus da Tristeza dos Citros (CTV) existe em várias formas que podem ou não apresentar sintomas nas plantas. Os compostos bioativos e antioxidantes estão naturalmente presentes nas plantas e fornecem um mecanismo de defesa que é geralmente acelerado em resposta a um estresse. O objetivo do presente estudo foi analisar as alterações causadas pelo CTV nos antioxidantes enzimáticos e não enzimáticos de laranjas doces. Foi observado que, em resposta ao ataque de CTV, os antioxidantes não enzimáticos como flavonoides totais, ácido ascórbico, ácido fenólico e antioxidantes enzimáticos, como as atividades de catalase, superóxido dismutase e peroxidase, geralmente mostram uma tendência crescente. O perfil de antioxidantes em resposta a um ataque viral pode ajudar na descoberta de novos biomarcadores que podem ser usados ​​como uma ferramenta de monitoramento no gerenciamento de doenças.


Subject(s)
Plant Diseases/prevention & control , Plant Diseases/virology , Closterovirus/physiology , Citrus sinensis/enzymology , Citrus sinensis/chemistry , Antioxidants/analysis , Antioxidants/classification , Ascorbic Acid/analysis , Flavonoids/analysis , Catalase/analysis , Peroxidase/analysis
2.
Acta cir. bras ; 34(11): e201901102, Nov. 2019. tab, graf
Article in English | LILACS | ID: biblio-1054682

ABSTRACT

Abstract Purpose: To investigate the effect of Picroside II on testicular ischemia and reperfusion (l/R) injury and the underlying mechanism. Methods: Sprague-Dawley rats were randomly divided into 4 groups: sham operated group (Sham), Sham with Picroside II treatment group (Sham+ Pic II), l/R group (l/R) and l/R with Picroside II treatment group (I/R+ Pic II). l/R model was established by rotating the left testis 720° in a clock-wise direction for 4 hours. The histopathologic and spermatogenetic evaluation was performed. The apoptosis changes and the levels of HO-1 (heme oxygenase-1), MPO (myeloperoxidase), NOX (NADPH oxidase), SOD (superoxide dismutase), XO (xanthine oxidase) and NOS (nitric oxide synthase) were measured. Results: The seminiferous tubules were damaged in l/R rats, but Picroside II alleviated the changes induced by l/R. The increased level of apoptosis was decreased by Picroside II (P=0.01, 9.05±0.35 vs. 4.85±0.25). The activities of HO-1, MPO, NOX, XO and MDA content were increased and the SOD activity was decreased in l/R (P<0.05) and could be reversed by Picroside II (P=0.03, 405.5±7.5 vs. 304±17U/mgprot; P=0.02, 0.99±0.05 vs. 0.52±0.04 mgprot; P=0.01, 260+7 vs. 189±2 mgprot; P=0.04, 10.95+0.55 vs. 8.75+0.35 U/mgprot; P=0.045, 6.8+0.7 vs. 3.75+0.35 mgprot; P=0.04, 44.5+3.5 vs. 57.5+3.5 mgprot). Western blot showed that the expression of iNOS, nNOS and eNOS were increased in l/R (P<0.05); however, they were decreased after Picroside II treatment (P<0.05). Conclusion: Picroside II attenuated testicular I/R injury in rats mainly through suppressing apoptosis and oxidative stress through reduction of nitric oxide synthesis.


Subject(s)
Animals , Male , Testis/blood supply , Reperfusion Injury/prevention & control , Cinnamates/pharmacology , Apoptosis/drug effects , Oxidative Stress/drug effects , Iridoid Glucosides/pharmacology , Nitric Oxide/biosynthesis , Reperfusion Injury/metabolism , Reperfusion Injury/pathology , Random Allocation , Blotting, Western , Rats, Sprague-Dawley , Peroxidase/analysis , In Situ Nick-End Labeling , Heme Oxygenase-1/analysis , Malondialdehyde/analysis , NADP/analysis
3.
Acta cir. bras ; 34(10): e201901004, Oct. 2019. graf
Article in English | LILACS | ID: biblio-1054674

ABSTRACT

Abstract Purpose: To evaluate the effects of infliximab on the inflammation of the colonic mucosa devoid from fecal stream. Methods: Twenty-four rats were submitted to a Hartmann's procedure. They remained for 12 weeks with the fecal derivation to development of diversion colitis on excluded colorectal stump. After this period, they were divided into 3 groups: one group received intervention with saline (2.0 mL / week), other group infliximab at doses of 5 mg/kg/week and the other 10 mg/kg/week for five consecutively weeks. Concluded the intervention period, the animals were euthanized to remove colon segments with and without fecal stream. Colitis was diagnosed by histological analysis and the degree of inflammation by validated score. The neutrophilic infiltrate was evaluated by tissue expression of myeloperoxidase identified by immunohistochemical. The tissue content of myeloperoxidase was measured by computer-assisted image analysis. Results: The inflammatory score was high in colonic segments without fecal stream. The intervention with infliximab reduced the inflammatory score in excluded colonic segments. The content of myeloperoxidase was reduced in colonic segments of animals treated with infliximab mainly in high concentrations. Conclusion: Intervention with infliximab reduced the inflammation and the neutrophil infiltrate in colonic segments devoid of the fecal stream.


Subject(s)
Animals , Male , Gastrointestinal Agents/pharmacology , Tumor Necrosis Factor-alpha/antagonists & inhibitors , Colitis/drug therapy , Infliximab/pharmacology , Time Factors , Image Processing, Computer-Assisted , Gastrointestinal Transit/drug effects , Immunohistochemistry , Reproducibility of Results , Rats, Wistar , Colitis/pathology , Colon/drug effects , Colon/pathology , Peroxidase/analysis , Neutrophil Infiltration/drug effects , Feces , Intestinal Mucosa/drug effects , Intestinal Mucosa/pathology
4.
Arq. neuropsiquiatr ; 77(2): 106-114, Feb. 2019. tab, graf
Article in English | LILACS | ID: biblio-983892

ABSTRACT

ABSTRACT Ducrosia anethifolia has been recommended as a remedy for neurological disorders. However, the anticonvulsant effects of D. anethifolia essential oil (DAEO) and its major constituent α-pinene have not yet been clarified. Methods: A rat model of pentylenetetrazole (PTZ)-induced convulsions was used. Oxidant and antioxidant parameters were assayed in the temporal lobe. Results: The data showed that DAEO (50, 100 and 200 mg/kg, i.p.) and α-pinene (0.2 and 0.4 mg/kg i.p.) delayed the initiation time, and reduced the duration of myoclonic and tonic-clonic seizures following PTZ injection. The PTZ produced oxidative stress so that malondialdehyde and hydrogen peroxide levels were increased and catalase and peroxidase activity decreased. Pretreatment with DAEO and α-pinene significantly inhibited the above-mentioned enzymatic changes in PTZ-treated animals. Conclusion: The results suggest that α-pinene, at teast in part, was responsible for the induction of the anticonvulsant and antioxidant effects of DAEO in rats.


RESUMO A Ducrosia anethifolia tem sido recomendada como remédio para os distúrbios neurológicos. No entanto, os efeitos anticonvulsivantes do óleo essencial de Ducrosia anethifolia (DAEO) e do seu principal constituinte atfa-pineno (α-pineno) ainda não foram clarificados. Métodos: Foi utilizado um modelo de rato de convulsões induzidas por pentilenotetrazol (PTZ). Os parâmetros oxidante e antioxidante foram ensaiados no lobo temporal do cérebro. Resultados: Os dados mostraram que DAEO (50, 100 e 200 mg / kg, i.p.) e α-pineno (0,2 e 0,4 mg / kg i.p.) retardaram o tempo de iniciação e reduziram a duração das crises mioclônicas e tônico-clônicas após a injeção de PTZ. O PTZ produziu estresse oxidativo, de modo que os níveis de malondialdeído (MDA) e de peróxido de hidrogênio aumentaram e a atividade da catalase e da peroxidase diminuiu. O pré-tratamento com DAEO e α-pineno inibiu significativamente as alterações enzimáticas mencionadas em animais tratados com PTZ. Conclusão: O resultado sugere que α-pineno, peto menos em parte, é responsável peta indução dos efeitos anticonvulsivantes e antioxidantes da DAEO em ratos.


Subject(s)
Animals , Male , Seizures/drug therapy , Oils, Volatile/pharmacology , Apiaceae/chemistry , Bicyclic Monoterpenes/pharmacology , Anticonvulsants/pharmacology , Pentylenetetrazole , Seizures/metabolism , Time Factors , Oils, Volatile/chemistry , Lipid Peroxidation/drug effects , Catalase/analysis , Reproducibility of Results , Chromatography, High Pressure Liquid , Treatment Outcome , Rats, Wistar , Peroxidase/analysis , Oxidative Stress/drug effects , Bicyclic Monoterpenes/chemistry , Hydrogen Peroxide/analysis , Malondialdehyde/analysis , Anticonvulsants/chemistry , Antioxidants/analysis , Antioxidants/metabolism
5.
J. appl. oral sci ; 27: e20180211, 2019. tab, graf
Article in English | LILACS, BBO | ID: biblio-984568

ABSTRACT

Abstract Objective The aim of this study was to evaluate the effects of gliclazide on oxidative stress, inflammation, and bone loss in an experimental periodontal disease model. Material and Methods Male albino Wistar rats were divided into no ligature, ligature, and ligature with 1, 5, and 10 mg/kg gliclazide groups. Maxillae were fixed and scanned using micro-computed tomography to quantify linear and bone volume/tissue volume (BV/TV) and volumetric bone loss. Histopathological, immunohistochemical and immunofluorescence analyses were conducted to examine matrix metalloproteinase-2 (MMP-2), cyclooxygenase 2 (COX-2), cathepsin K, members of the receptor activator of the nuclear factor kappa-Β ligand (RANKL), receptor activator of nuclear factor kappa-Β (RANK), osteoprotegerin (OPG) pathway, macrophage migration inhibitory factor (MIF), superoxide dismutase-1 (SOD-1), glutathione peroxidase-1 (GPx-1), NFKB p 50 (Cytoplasm), NFKB p50 NLS (nuclear localization signal), PI3 kinase and AKT staining. Myeloperoxidase activity, malondialdehyde and glutathione levels, while interleukin-1 beta (IL-1β) and tumor necrosis factor-alpha (TNF-α) levels were evaluated by spectroscopic ultraviolet-visible analysis. A quantitative reverse transcription polymerase chain reaction was used to quantify the gene expression of the nuclear factor kappa B p50 subunit (NF-κB p50), phosphoinositide 3-kinase (PI3k), protein kinase B (AKT), and F4/80. Results Micro-computed tomography showed that the 1 mg/kg gliclazide treatment reduced linear bone loss compared to the ligature, 5 mg/kg gliclazide, and 10 mg/kg gliclazide treatments. All concentrations of gliclazide increased bone volume/tissue volume (BV/TV) compared to the ligature group. Treatment with 1 mg/kg gliclazide reduced myeloperoxidase activity, malondialdehyde, IL-1β, and TNF-α levels (p≤0.05), and resulted in weak staining for COX-2, cathepsin k, MMP-2, RANK, RANKL, SOD-1, GPx-1,MIF and PI3k. In addition, down-regulation of NF-κB p50, PI3k, AKT, and F4/80 were observed, and OPG staining was strong after the 1 mg/kg gliclazide treatment. Conclusions This treatment decreased neutrophil and macrophage migration, decreased the inflammatory response, and decreased bone loss in rats with ligature-induced periodontitis.


Subject(s)
Animals , Male , Periodontitis/drug therapy , Alveolar Bone Loss/drug therapy , Oxidative Stress/drug effects , Gliclazide/pharmacology , Antioxidants/pharmacology , Periodontitis/pathology , Immunohistochemistry , Random Allocation , Reproducibility of Results , Alveolar Bone Loss/pathology , Fluorescent Antibody Technique , Macrophage Migration-Inhibitory Factors/adverse effects , Tumor Necrosis Factor-alpha/analysis , Rats, Wistar , Peroxidase/analysis , Reverse Transcriptase Polymerase Chain Reaction , Matrix Metalloproteinase 2/analysis , Interleukin-1beta/analysis , RANK Ligand/analysis , Receptor Activator of Nuclear Factor-kappa B/analysis , X-Ray Microtomography , Cathepsin K/analysis , Gingiva/pathology , Gingiva/chemistry , Gliclazide/therapeutic use , Glutathione/analysis , Malondialdehyde/analysis , Neutrophils/drug effects , Antioxidants/therapeutic use
6.
J. appl. oral sci ; 27: e20180108, 2019. tab, graf
Article in English | LILACS, BBO | ID: biblio-975873

ABSTRACT

Abstract Objective: This study aims to evaluate the clinical and biochemical (oxidative stress and pro-inflammatory mediators) effects of the gaseous ozone use accompanied by scaling and root planning (SRP) in periodontal treatment. Material and Methods: The study population consisted of 40 patients with chronic periodontitis (CP) randomly sorted into two groups of 20. The experimental group received SRP plus 3 watts gaseous ozone in two separate applications five days apart, whereas the control group received SRP plus placebo. Clinical periodontal parameters were assayed and saliva samples were taken before the initial and one month after the second treatment. Periodontal examination assessed plaque index (PI), gingival index (GI), probing depth, and clinical attachment level (CAL). Total antioxidant status (TAS), total oxidant status (TOS), nitric oxide (NO), 8-hydroxy-2'-deoxyguanosine (8-OHdG), myeloperoxidase (MPO), glutathione (GSH), malondialdehyde (MDA), and transforming growth factor-beta (TGF-β) levels were evaluated from saliva samples. Results: Changes following treatment in PI, GI, probing depth, and CAL scores were similar for both groups (p>0.05). Of note, TGF-β levels were observed to be higher in the treatment group than in controls (p<0.05). Changes in 8-OHdG, TAS, TOS, NO, MPO, GSH and MDA levels, however, were not significantly different between groups (p>0.05). Conclusion: The findings of this study indicate that SRP plus gaseous ozone versus SRP alone does not correlate to a significant improvement in periodontal recovery.


Subject(s)
Humans , Male , Female , Adult , Oxidants, Photochemical/therapeutic use , Ozone/therapeutic use , Root Planing/methods , Chronic Periodontitis/therapy , Saliva/chemistry , Time Factors , Enzyme-Linked Immunosorbent Assay , Periodontal Index , Dental Plaque Index , Reproducibility of Results , Transforming Growth Factor beta/analysis , Treatment Outcome , Oxidants/antagonists & inhibitors , Peroxidase/analysis , Statistics, Nonparametric , Deoxyguanosine/analysis , Deoxyguanosine/analogs & derivatives , Chronic Periodontitis/pathology , Glutathione/analysis , Malondialdehyde/analysis , Middle Aged , Nitric Oxide/analysis , Antioxidants/analysis
7.
Acta cir. bras ; 34(8): e201900805, 2019. tab, graf
Article in English | LILACS | ID: biblio-1038124

ABSTRACT

Abstract Purpose To investigate the effect of sevoflurane preconditioning on ischemia/reperfusion (I/R)-induced pulmonary/hepatic injury Methods Fifty-one Wistar rats were randomly grouped into sham, I/R, and sevoflurane groups. After reperfusion, the structural change of the lung was measured by Smith score, the wet and dry weights (W/D) were determined, malondialdehyde (MDA) myeloperoxidase (MPO) content was determined colorimetrically and by fluorescence, respectively, and matrix metalloprotein-9 (MMP-9) mRNA was quantified by RT-PCR. Biopsy and morphological analyses were performed on liver tissue, activities of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were determined, and tumor necrosis factor-alpha (TNF-α) level was determined. Results The sham group showed no changes in tissue structure. Structural lesions in the sevoflurane and I/R groups were mild and severe, respectively. Smith score, W/D, MDA, MPO, and MMP mRNA showed the same trend, and were increased in the I/R group and recovered in the sevoflurane group, compared with the sham group (both P<0.05). AST and ALT were significantly increased compared to the sham group (AST: 655±52.06 vs . 29±9.30 U/L; ALT: 693±75.56 vs . 37±6.71 U/L; P<0.05). In the sevoflurane group, AST and ALT levels were significantly decreased (464±47.71 and 516±78.84 U/L; P<0.001). TNF-α presented similar results. Conclusion The protection of lung and liver by sevoflurane may be mediated by inhibited leukocyte recruitment and MMP-9 secretion.


Subject(s)
Animals , Male , Rats , Reperfusion Injury/prevention & control , Anesthetics, Inhalation/therapeutic use , Ischemic Preconditioning/methods , Liver/blood supply , Lung/blood supply , Aspartate Aminotransferases/blood , Reperfusion Injury/drug therapy , Tumor Necrosis Factor-alpha/blood , Peroxidase/analysis , Alanine Transaminase/blood , Disease Models, Animal , Sevoflurane/therapeutic use , Ischemia/prevention & control , Liver/drug effects , Liver/pathology , Lung/drug effects , Lung/pathology , Malondialdehyde/analysis
8.
Acta cir. bras ; 33(4): 375-385, Apr. 2018. tab, graf
Article in English | LILACS | ID: biblio-886280

ABSTRACT

Abstract Purpose: To investigate the effects of melatonin on antioxidant capacity, inflammation and apoptotic cell death (through expression of cleaved-caspase 3) in lung tissue samples of diabetic rats. Methods: Thirty male Sprague-Dawley rats were randomly divided into three groups. Group 1 (control group) was made up of healthy rats. Group 2 (diabetes group) received streptozotocin at a dose of 50 mg/kg/day for 5 days.Group 3 (diabetes plus melatonin group) received streptozotocin at a dose of 50 mg/kg/day for 5 days and then they received melatonin at a dose of 20 mg/kg/day between 28thand 35thdays of the study. Results: Tissue MDA and MPO levels were found to be significantly higher in diabetes group compared to control group (p<0.05) whilst administration of melatonin was found to significantly lower this increase down to normal levels (p<0.05). Bronchus associated lymphoid tissue (BALT) was more severe in diabetics whereas administration of melatonin alleviated this hyperplasia. Cleaved caspase 3 activity was severe in hyperplastic BALT in diabetic rats however in lowered down to moderate level when melatonin was administered. Conclusion: The melatonin caused an increase in antioxidant capacity and decreased the expression of cleaved-caspase 3.


Subject(s)
Animals , Male , Diabetes Mellitus, Experimental/pathology , Caspase 3/analysis , Pyroptosis/drug effects , Lung/drug effects , Melatonin/pharmacology , Antioxidants/pharmacology , Superoxide Dismutase/analysis , Time Factors , Immunohistochemistry , Lipid Peroxidation , Catalase/analysis , Random Allocation , Reproducibility of Results , Rats, Sprague-Dawley , Streptozocin , Peroxidase/analysis , Diabetes Mellitus, Experimental/complications , Diabetes Mellitus, Experimental/metabolism , Caspase 3/drug effects , Glutathione/analysis , Lung/metabolism , Lung/pathology , Malondialdehyde/analysis
9.
J. appl. oral sci ; 26: e20180048, 2018. graf
Article in English | LILACS, BBO | ID: biblio-954519

ABSTRACT

Abstract Objective: Periodontitis is associated with endothelial dysfunction, which is clinically characterized by a reduction in endothelium-dependent relaxation. However, we have previously shown that impairment in endothelium-dependent relaxation is transient. Therefore, we evaluated which mediators are involved in endothelium-dependent relaxation recovery. Material and methods: Rats were subjected to ligature-induced experimental periodontitis. Twenty-one days after the procedure, the animals were prepared for blood pressure recording, and the responses to acetylcholine or sodium nitroprusside were obtained before and 30 minutes after injection of a nitric oxide synthase inhibitor (L-NAME), cyclooxygenase inhibitor (Indomethacin, SC-550 and NS- 398), or calcium-dependent potassium channel blockers (apamin plus TRAM- 34). The maxilla and mandible were removed for bone loss analysis. Blood and gingivae were obtained for C-reactive protein (CRP) and myeloperoxidase (MPO) measurement, respectively. Results: Experimental periodontitis induces bone loss and an increase in the gingival MPO and plasmatic CRP. Periodontitis also reduced endothelium-dependent vasodilation, a hallmark of endothelial dysfunction, 14 days after the procedure. However, the response was restored at day 21. We found that endothelium-dependent vasodilation at day 21 in ligature animals was mediated, at least in part, by the activation of endothelial calcium-activated potassium channels. Conclusions: Periodontitis induces impairment in endothelial-dependent relaxation; this impairment recovers, even in the presence of periodontitis. The recovery is mediated by the activation of endothelial calcium-activated potassium channels in ligature animals. Although important for maintenance of vascular homeostasis, this effect could mask the lack of NO, which has other beneficial properties.


Subject(s)
Animals , Male , Periodontitis/physiopathology , Periodontitis/metabolism , Vasodilation/physiology , Potassium Channels/metabolism , Prostaglandin-Endoperoxide Synthases/metabolism , Nitric Oxide/metabolism , Time Factors , Vasodilation/drug effects , Vasodilator Agents/pharmacology , C-Reactive Protein/analysis , Nitroprusside/pharmacology , Potassium Channels/drug effects , Acetylcholine/pharmacology , Random Allocation , Alveolar Bone Loss/physiopathology , Alveolar Bone Loss/metabolism , Cyclooxygenase Inhibitors/pharmacology , Prostaglandin-Endoperoxide Synthases/drug effects , Rats, Wistar , Peroxidase/analysis , NG-Nitroarginine Methyl Ester/pharmacology , Potassium Channel Blockers/pharmacology , Arterial Pressure/drug effects , Arterial Pressure/physiology , Ligation
10.
J. appl. oral sci ; 26: e20170266, 2018. tab, graf
Article in English | LILACS, BBO | ID: biblio-954507

ABSTRACT

Abstract Objective In this study, we aimed to histologically and immunologically evaluate the effect of diode laser treatment when applied adjunctive to scaling and root planing (SRP) in an experimental periodontitis model. Materials and methods We used Wistar-Albino rats (n=60) with average weight of 230 g. Experimental periodontitis was induced by ligature at the right and left first mandibular molar teeth in all rats. After 11 days, the ligature was removed and rats were divided into two groups. The control group (n=30) received only SRP treatment, while the laser group (n=30) received a diode laser (GaAlAs, 810 nm, 1 W, 10 J, 20 s) treatment adjunctive to SRP. Ten rats in each group were sacrificed after 7, 15, and 30 days. Histopathological examination was performed in the left mandible of rats. Myeloperoxidase (MPO) was evaluated by western blot in the gingival specimens from the right mandible. Results MPO levels in the laser group were statistically significantly lower compared with the control group (p≤0.05). There was no statistically significance at any time between MPO levels in the control group (p>0.05). MPO levels in the laser group at the 7th day were statistically significantly higher compared to the 15th (p≤0.05) and the 30th day (p≤0.05). Inflammatory cell infiltration decreased over time in both groups and was statistically significantly lower in the laser group than in the control group at all times (p≤0.01). Conclusions Within the limits of this study, we suggest that diode laser application is an adjunctive treatment because it reduced inflammation and MPO when applied in addition to SRP. On the other hand, more studies are needed for the assessment of the effects of diode laser application to periodontal tissues.


Subject(s)
Animals , Periodontitis/pathology , Periodontitis/therapy , Dental Scaling/methods , Peroxidase/analysis , Low-Level Light Therapy/methods , Lasers, Semiconductor/therapeutic use , Periodontitis , Time Factors , Random Allocation , Blotting, Western , Reproducibility of Results , Treatment Outcome , Rats, Wistar , Combined Modality Therapy , Disease Models, Animal , Ligation
11.
Braz. j. med. biol. res ; 51(8): e7543, 2018. tab, graf
Article in English | LILACS | ID: biblio-951741

ABSTRACT

Allantoin is the main product of uric acid oxidation and was found to be augmented in atherosclerotic plaque in human autopsy and in animal models of atherosclerosis. Uric acid is abundant in human plasma and is prone to oxidation in inflammatory conditions such as atherosclerosis. In this study, we found a significant increase in plasma uric acid (P=0.002) and allantoin (P=0.025) in participants of the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil) that presented common carotid intima-media thickness (c-IMT) within the 75th percentile (c-IMT≥P75). Multiple linear regression showed an association of c-IMT with uric acid (β=0.0004, P=0.014) and allantoin (β=0.018, P=0.008). This association was independent of age, the traditional risk factor LDL/HDL ratio, and non-traditional risk factors: pulse pressure, neck circumference, and the inflammatory marker myeloperoxidase. The independent and strong association of allantoin with c-IMT shows that it might be a useful marker, along with other traditional risk factors, to evaluate an early stage of atherosclerosis.


Subject(s)
Humans , Male , Middle Aged , Uric Acid/blood , Allantoin/blood , Atherosclerosis/blood , Carotid Intima-Media Thickness , Biomarkers/blood , Linear Models , Double-Blind Method , Peroxidase/analysis , Oxidative Stress , Atherosclerosis/diagnostic imaging
12.
Int. braz. j. urol ; 43(2): 345-355, Mar.-Apr. 2017. tab, graf
Article in English | LILACS | ID: biblio-840833

ABSTRACT

ABSTRACT Introduction Sepsis is an inflammatory reaction to bacteria involving the whole body and is a significant cause of mortality and economic costs. The purpose of this research was to determine whether tadalafil exhibits a preventive effect on sepsis in a septic model induced in rats with cecal ligation and puncture (CLP). Materials and Methods Rats were randomly separated into groups, 10 rats in each: (i) a sham (control) group, (ii) an untreated sepsis group, (iii) a sepsis group treated with 5mg/kg tadalafil and (iv) a sepsis group treated with 10mg/kg tadalafil. A polymicrobial sepsis model was induced in rats using CLP. Rats were sacrificed after 16h, and blood and kidney tissues were collected for biochemical and histopathological study. Results Levels of the inflammatory parameter IL-6 decreased significantly in the sepsis groups receiving tadalafil in comparison with the untreated sepsis group (p<0.05). In terms of histopathology, inflammation scores investigated in kidney tissues decreased significantly in the sepsis groups receiving tadalafil compared to the untreated sepsis group (p<0.05). In addition, levels of creatinine and cystatin C measured in septic rats receiving tadalafil were lower by a clear degree than in septic rats (p<0.05). Conclusion In this study, tadalafil exhibited a preventive effect for sepsis-related damage by suppressing inflammation in serum and kidney tissue of septic rats in a polymicrobial sepsis model induced with CLP.


Subject(s)
Animals , Male , Sepsis/complications , Sepsis/prevention & control , Renal Insufficiency/etiology , Renal Insufficiency/prevention & control , Phosphodiesterase 5 Inhibitors/therapeutic use , Tadalafil/therapeutic use , Reference Values , Spectrophotometry , Superoxide Dismutase/analysis , Calcitonin/blood , Enzyme-Linked Immunosorbent Assay , Immunohistochemistry , Catalase/analysis , Random Allocation , Reproducibility of Results , Interleukin-6/blood , Rats, Wistar , Peroxidase/analysis , Sepsis/pathology , Creatinine/blood , Disease Models, Animal , Renal Insufficiency/pathology , Cystatin C/blood , Kidney/drug effects , Kidney/pathology , Ligation , Malondialdehyde/analysis
13.
J. appl. oral sci ; 24(3): 271-277, graf
Article in English | LILACS, BBO | ID: lil-787548

ABSTRACT

ABSTRACT Sesquiterpene lactones (SLs) are the active constituents of a variety of medicinal plants used in traditional medicine for the treatment of inflammatory diseases and other ailments. Objective In this study, we evaluated whether budlein A modulates the activation of innate and adaptive immune cells such as neutrophils and lymphocytes. Material and Methods Our research group has investigated several plant species and several compounds have been isolated, identified, and their medical potential evaluated. Budlein A is a SL isolated from the species Aldama buddlejiformis and A. robusta (Asteraceae) and shows anti-inflammatory and anti-nociceptive activities. Advances in understanding how plant-derived substances modulate the activation of innate and adaptive immune cells have led to the development of new therapies for human diseases. Results Budlein A inhibited MPO activity, IL-6, CXCL8, IL-10, and IL-12 production and induces neutrophil apoptosis. In contrast, budlein A inhibited lymphocyte proliferation and IL-2, IL-10, TGF-β, and IFN-γ production, but it did not lead to cell death. Conclusions Collectively, our results indicate that budlein A shows distinct immunomodulatory effects on immune cells.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Sesquiterpenes/pharmacology , T-Lymphocytes/drug effects , Lactones/pharmacology , Anti-Inflammatory Agents/pharmacology , Neutrophils/drug effects , Enzyme-Linked Immunosorbent Assay , Transforming Growth Factors/analysis , Transforming Growth Factors/drug effects , Cells, Cultured , Reproducibility of Results , Analysis of Variance , Interleukin-8/analysis , Interleukin-8/drug effects , Interleukins/analysis , Apoptosis/drug effects , Peroxidase/analysis , Peroxidase/drug effects , Asteraceae/chemistry , Cell Proliferation/drug effects , Flow Cytometry
14.
Acta cir. bras ; 31(4): 256-263, Apr. 2016. graf
Article in English | LILACS | ID: lil-781329

ABSTRACT

PURPOSE: To investigate the effect of medical ozone treatment on the experimental acute distal colitis in rats. METHODS: Eighteen rats were randomly distributed into three equal groups; control, acute distal colitis (ADC) without and with medical ozone treatment. Rats in the control group were taken saline. ADC was performed by rectal way with 4% acetic acid in groups 2 and 3, and the group 3 was treated with medical ozone for three weeks both rectally and intraperitoneally. At the twenty second day the distal colons samples were obtained for malondialdehyde and myeloperoxidase, blood samples were obtained to measure the levels of TNF-α and IL-1β levels. Histolopatological examination was evaluated with Ki-67, IL-1β and VEGF immunostaining densities. RESULTS: There was significant increase in tissue MDA, MPO activity, TNF-α and IL-1β after ozone administration. There was also a significant difference at immunostaining densities of histopathological examination. CONCLUSIONS: Medical ozone treatment ameliorated the experimental acute distal colitis induced by acetic acid in rats. Its possible effect is by means of decreasing inflammation, edema, and affecting the proliferation and the vascularization.


Subject(s)
Animals , Male , Oxidants, Photochemical/therapeutic use , Ozone/therapeutic use , Colitis, Ulcerative/drug therapy , Time Factors , Immunohistochemistry , Colitis, Ulcerative/pathology , Random Allocation , Acute Disease , Reproducibility of Results , Tumor Necrosis Factor-alpha/blood , Treatment Outcome , Rats, Wistar , Colon/pathology , Peroxidase/analysis , Acetic Acid , Vascular Endothelial Growth Factor A/analysis , Disease Models, Animal , Interleukin-1beta/blood , Malondialdehyde/analysis
15.
Acta cir. bras ; 31(2): 111-118, Feb. 2016. graf
Article in English | LILACS | ID: lil-775561

ABSTRACT

PURPOSE: To investigate the effects of medical ozone theraphy on the colon anastomosis of peritonitis model in rats. METHODS: Eighteen rats were randomly assigned into three equal groups; control, cecal punctuation and colon anastomosis and ozone theraphy. Sepsis was performed with a cecal punctuation in groups 2 and 3. The medical ozone theraphy was administered intraperitonealy for three weeks in group 3 while the other rats received saline injection. At the twenty second day serum were obtained for TNF-α and IL-1β, the colonic burst pressures were measured and colonic tissue samples were obtained for MDA and MPO levels. Histolopatological examination was evaluated with H&E stain, and Ki-67, IL-1β and the VEGF immunostaining densities were also compared. RESULTS: Intraperitoneal ozone administration reversed TNF-α, IL-1β, MDA and MPO levels and the colonic burst pressures. There was also a significant difference at immunostaining densities of histopathological examination. CONCLUSION: Medical ozone therapy may contribute to tissue healing by affecting the proliferation and the vascularization thus has benefits on colonic anastomosis at peritonitis in rats.


Subject(s)
Animals , Male , Ozone/pharmacology , Peritonitis/chemically induced , Wound Healing/drug effects , Colon/surgery , Anastomosis, Surgical , Random Allocation , Tumor Necrosis Factor-alpha/analysis , Tumor Necrosis Factor-alpha/drug effects , Rats, Wistar , Colon/pathology , Peroxidase/analysis , Peroxidase/drug effects , Disease Models, Animal , Interleukin-1beta/analysis , Interleukin-1beta/drug effects , Malondialdehyde/analysis
16.
Braz. j. med. biol. res ; 49(9): e5388, 2016. tab, graf
Article in English | LILACS | ID: biblio-951696

ABSTRACT

Galunisertib (LY2157299), a selective ATP-mimetic inhibitor of TGF-β receptor I (TGF-βRI), is the only known TGF-β pathway inhibitor. In the present study, we investigated the effect of galunisertib on taurocholate (TAC)-induced acute pancreatitis (AP) in rats, and the role of TGF-β and NF-κB signaling pathways. AP was induced by infusion of TAC into the pancreatic duct of Sprague-Dawley male rats (n=30). The rats (220±50 g) were administered galunisertib intragastrically [75 mg·kg-1·day-1 for 2 days (0 and 24 h)]. Serum IL-1β, IL-6, TNF-α, amylase (AMY), lipase (LIP), and myeloperoxidase (MPO) levels were measured by ELISA. NF-κB activity was detected by electrophoretic mobility shift assay (EMSA); NF-κBp65 and TGF-β1 proteins, as well as TGF-βRI and p-Smad2/3 proteins, were detected by western blot assay. Cell apoptosis was detected by TUNEL assay. H&E staining was used to evaluate the histopathological alterations of the pancreas. Galunisertib treatment attenuated the severity of AP and decreased the pancreatic histological score. In addition, number of apoptotic cells were significantly increased in the galunisertib-treated group (16.38±2.26) than in the AP group (8.14±1.27) and sham-operated group (1.82±0.73; P<0.05 and P<0.01, respectively). Galunisertib decreased the expression levels of TGF-βRI and p-Smad2/3 and inhibited NF-κB activation and p65 translocation compared with the sham-operated group. Furthermore, serum IL-1β, IL-6, TNF-α, AMY and LIP levels and tissue MPO activity were significantly decreased in the galunisertib-treated group. Our data demonstrate that galunisertib attenuates the severity of TAC-induced experimental AP in rats by inducing apoptosis in the pancreas, inhibiting the activation of TGF-β signals and NF-κB as well as the secretion of pro-inflammatory cytokines.


Subject(s)
Animals , Male , Pancreatitis/drug therapy , Pyrazoles/therapeutic use , Quinolines/therapeutic use , Protein-Serine-Threonine Kinases/antagonists & inhibitors , Protein Kinase Inhibitors/therapeutic use , Pancreas/drug effects , Pancreas/pathology , Pancreatitis/pathology , Enzyme-Linked Immunosorbent Assay , Blotting, Western , Acute Disease , Interleukin-6/blood , Treatment Outcome , Apoptosis , Peroxidase/analysis , In Situ Nick-End Labeling , Electrophoretic Mobility Shift Assay , Interleukin-1beta/blood , Amylases/blood , Lipase/blood
17.
Arq. bras. oftalmol ; 78(6): 371-375, Nov.-Dec. 2015. tab, graf
Article in English | LILACS | ID: lil-768171

ABSTRACT

ABSTRACT Purpose: To evaluate the effects of 1% morphine instillation on clinical parameters, aqueous humor turbidity, and expression levels of tumor necrosis factor alpha (TNF-α), interleukin-1 beta (IL-1beta), prostaglandin E2 (PGE2), and myeloperoxidase (MPO) in rabbits with endotoxin-induced experimental uveitis. Methods: Twenty four New Zealand white rabbits were divided into four groups (n=6 each): control (CG), morphine (MG), naloxone (NG), and morphine-naloxone (MNG) groups. Under dissociative anesthesia, 0.1 mL of solution containing 0.2 µg of lipopolysaccharide (LPS) endotoxin from the Salmonella typhimurium cell wall was injected in the vitreous chamber. Clinical evaluations (conjunctical hyperemia, chemosis blepharospasm, and ocular discharge) and laser flaremetry were performed before (baseline), and 10 and 20 hours after induction of uveitis. Rabbits were subsequently euthanized and eyes were enucleated to quantify expression levels of TNF-α, IL-1 beta, PGE2, and MPO. Results: No significant differences in clinical parameters and flare values were observed between the study groups. TNF-α and IL-1 beta levels increased significantly in the CG, MG, NG, and MNG groups compared to baseline (P<0.05). Significant differences in PGE2 levels were observed between the MG and NMG groups (P<0.05). A trend toward increased MPO activity was observed in response to uveitis induction; however, this trend did not reach statistical significance (P>0.05). Conclusions: Morphine has no effect on clinical parameters, flare, or expression levels of inflammatory mediators in a rabbit model of uveitis induced by intravitreal injection of LPS.


RESUMO Objetivo: Estudaram-se os efeitos da instilação de morfina 1% sobre parâmetros clínicos, turbidez do humor aquoso e expressão de fator de necrose tumoral alfa (TNF-alfa), de interleucina-1 beta (IL-1beta), de prostaglandina E2 (PGE2) e de mieloperoxidase (MPO), em olhos de coelhos com uveíte induzida por endotoxina. Material e Métodos: Vinte e quatro coelhos da raça Nova Zelândia Branco foram distribuídos em quatro grupos (n=6, em cada): grupo controle (GC), morfina (GM), naloxona (GN) e morfina-naloxona (GMN). Sob anestesia dissociativa, injetou-se 0,1 mL de solução contendo 0,2 µg de lipossacarídeo (LPS) endotóxico da parede celular de Salmonella typhimurium na câmara vítrea. Realizou-se avaliação clínica (hiperemia conjuntival, quemose, blefaroespasmo e secreção ocular) e a flaremetria a “laser” antes (basal) e após 10 e 20 horas da indução da uveíte. No final, os coelhos foram submetidos à eutanásia e os olhos com uveíte foram enucleados para a quantificação dos níveis de TNF-alfa, IL-1 beta, PGE2 e MPO. Diferenças foram consideradas significativas quando p<0,05. Resultados: Os grupos da pesquisa não diferiram quanto aos parâmetros clínicos e os valores de “flare”. Observou-se elevação significativa nos níveis de TNF-alfa e de IL-1 beta, comparativamente ao basal, nos grupos GC, GM, GN e GMN (p<0,05). Valores de PGE2 variaram entre os grupos GM e GNM (p<0,05). A atividade de MPO aumentou após a indução da uveíte, porém, sem significância estatística (p>0,05). Conclusões: A morfina não atuou sobre parâmetros clínicos, “flare” e expressão dos mediadores inflamatórios estudados, quando instilada em olhos de coelhos com uveíte induzida por injeção intravítrea de LPS.


Subject(s)
Animals , Rabbits , Analgesics, Opioid/pharmacology , Dinoprostone/analysis , Interleukin-1beta/analysis , Morphine/pharmacology , Peroxidase/analysis , Tumor Necrosis Factor-alpha/analysis , Uveitis/drug therapy , Analgesics, Opioid/therapeutic use , Aqueous Humor/drug effects , Disease Models, Animal , Endotoxins , Instillation, Drug , Morphine/therapeutic use , Reference Values , Reproducibility of Results , Time Factors , Uvea/drug effects , Uvea/pathology , Uveitis/etiology , Uveitis/pathology
18.
Int. braz. j. urol ; 41(3): 576-583, May-June 2015. tab, ilus
Article in English | LILACS | ID: lil-755872

ABSTRACT

ABSTRACTObjective

The objective of the present study was to investigate the role of pentoxifylline (PTX) on remote testicular injury caused by unilateral hind limb ischemia/reperfusion of rats.

Materials and Methods

Twenty healthy male Wistar rats were allocated randomly into two groups: ischemia/reperfusion (IR group) and ischemia/reperfusion + pentoxifylline (IR+PTX group). Ischemia was induced by placement of a rubber tourniquet at the greater trochanter for 2h. Rats in IR+PTX group received PTX (40 mg/kg IP) before the reperfusion period. At 24h after reperfusion, testes were removed and levels of superoxide dismutase (SOD), malondialdehyde (MDA), catalase (CAT) and myeloperoxidase (MPO) activity were determined in testicular tissues. Three rats of each group were used for wet/ dry weight ratio measurement. Testicular tissues were also examined histopathologically under light microscopy.

Results

Activities of SOD and CAT in testicular tissues were decreased by ischemia/ reperfusion (P<0.05). Significantly increased MDA levels in testicular tissues were decreased by PTX treatment (P<0.05). MPO activity in testicular tissues in the IR group was significantly higher than in the IR+PTX group (P<0.05). The wet/dry weight ratio of testicular tissues in the IR group was significantly higher than in the IR+PTX group (P<0.05). Histopathologically, there was a statistically significant difference between two groups (P<0.05).

Conclusions

According to histological and biochemical findings, we conclude that PTX has preventive effects in the testicular injury induced by hind limb ischemia/reperfusion.

.


Subject(s)
Animals , Male , Free Radical Scavengers/pharmacology , Hindlimb/blood supply , Pentoxifylline/pharmacology , Reperfusion Injury/prevention & control , Testis/drug effects , Catalase/analysis , Disease Models, Animal , Ischemia/complications , Ischemia/prevention & control , Malondialdehyde/analysis , Peroxidase/analysis , Random Allocation , Rats, Wistar , Reproducibility of Results , Reperfusion Injury/complications , Superoxide Dismutase/analysis , Time Factors , Treatment Outcome , Testis/chemistry , Testis/metabolism , Testis/pathology
19.
Acta cir. bras ; 30(4): 247-252, 04/2015. tab, graf
Article in English | LILACS | ID: lil-744281

ABSTRACT

PURPOSE: To determine the antioxidant and anti-inflammatory effects of alfa lipoic acid (ALA) on the liver injury induced by methotrexate (MTX) in rats. METHODS: Thirty two rats were randomly assigned into four equal groups; control, ALA, MTX and MTX with ALA groups. Liver injury was performed with a single dose of MTX (20 mg/kg) to groups 3 and 4. The ALA was administered intraperitonealy for five days in groups 2 and 4. The other rats received saline injection. At the sixth day the rats decapitated, blood and liver tissue samples were removed for TNF-α, IL-1β, malondialdehyde, glutathione, myeloperoxidase and sodium potassium-adenosine triphosphatase levels measurement and histological examination. RESULTS: MTX administration caused a significant decrease in tissue GSH, and tissue Na+, K+ ATPase activity and which was accompanied with significant increases in tissue MDA and MPO activity. Moreover the pro-inflammatory cytokines (TNF-α, IL- β) were significantly increased in the MTX group. On the other hand, ALA treatment reversed all these biochemical indices as well as histopathological alterations induced by MTX. CONCLUSION: Alfa lipoic acid ameliorates methotrexate induced oxidative damage of liver in rats with its anti-inflammatory and antioxidant effects. .


Subject(s)
Animals , Female , Male , Antimetabolites, Antineoplastic/toxicity , Antioxidants/therapeutic use , Chemical and Drug Induced Liver Injury/prevention & control , Methotrexate/toxicity , Thioctic Acid/therapeutic use , Anti-Inflammatory Agents/therapeutic use , Chemical and Drug Induced Liver Injury/pathology , Enzyme-Linked Immunosorbent Assay , Glutathione/analysis , Interleukin-1beta/blood , Liver/drug effects , Liver/pathology , Malondialdehyde/analysis , Necrosis/pathology , Peroxidase/analysis , Random Allocation , Rats, Wistar , Reproducibility of Results , Treatment Outcome , Tumor Necrosis Factor-alpha/blood
20.
Acta cir. bras ; 29(5): 287-291, 05/2014. graf
Article in English | LILACS | ID: lil-709234

ABSTRACT

PURPOSE: To evaluate the role of exogenous normal lymph (ENL) on lipopolysaccharide (LPS)-induced acute lung injury (ALI) in rats. METHODS: ALI was induced by the jugular vein injection of LPS (iv, 15 mg/kg) in rats of the LPS and LPS+ENL groups within 15 min, then, ENL without cell components (5 ml/kg) was infused at the speed of 0.5 ml per minute in the LPS+ENL group, the same amount of saline was administered in the LPS group. The rats in the sham group received the same surgical procedure and saline. The histomorphology and the levels of P-selectin, intercellular adhesion molecule-1 (ICAM-1), myeloperoxidase (MPO) in pulmonary tissue were assessed. RESULTS: LPS induced pulmonary injury as well as increased the wet/dry weight ratio (W/D) and the levels of P-selectin, ICAM-1, and MPO in pulmonary tissues. These deleterious effects of LPS were significantly ameliorated by ENL treatment. CONCLUSION: Exogenous normal lymph could markedly alleviate the acute lung injury induced by lipopolysaccharide, and its effects might be related to lessening the adhesion molecules. .


Subject(s)
Animals , Male , Acute Lung Injury/metabolism , Intercellular Adhesion Molecule-1/metabolism , Lymph/metabolism , Acute Lung Injury/chemically induced , Acute Lung Injury/pathology , Disease Models, Animal , Enzyme-Linked Immunosorbent Assay , Lipopolysaccharides , Lung/metabolism , Lung/pathology , P-Selectin/analysis , Peroxidase/analysis , Random Allocation , Rats, Wistar , Time Factors
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