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1.
Mol Cell Biochem ; 479(4): 825-829, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-37198322

RESUMO

One in 700 children is born with the down syndrome (DS). In DS, there is an extra copy of X chromosome 21 (trisomy). Interestingly, the chromosome 21 also contains an extra copy of the cystathionine beta synthase (CBS) gene. The CBS activity is known to contribute in mitochondrial sulfur metabolism via trans-sulfuration pathway. We hypothesize that due to an extra copy of the CBS gene there is hyper trans-sulfuration in DS. We believe that understanding the mechanism of hyper trans-sulfuration during DS will be important in improving the quality of DS patients and towards developing new treatment strategies. We know that folic acid "1-carbon" metabolism (FOCM) cycle transfers the "1-carbon" methyl group to DNA (H3K4) via conversion of s-adenosyl methionine (SAM) to s-adenosyl homocysteine (SAH) by DNMTs (the gene writers). The demethylation reaction is carried out by ten-eleven translocation methylcytosine dioxygenases (TETs; the gene erasers) through epigenetics thus turning the genes off/on and opening the chromatin by altering the acetylation/HDAC ratio. The S-adenosyl homocysteine hydrolase (SAHH) hydrolyzes SAH to homocysteine (Hcy) and adenosine. The Hcy is converted to cystathionine, cysteine and hydrogen sulfide (H2S) via CBS/cystathioneγ lyase (CSE)/3-mercaptopyruvate sulfurtransferase (3MST) pathways. Adenosine by deaminase is converted to inosine and then to uric acid. All these molecules remain high in DS patients. H2S is a potent inhibitor of mitochondrial complexes I-IV, and regulated by UCP1. Therefore, decreased UCP1 levels and ATP production can ensue in DS subjects. Interestingly, children born with DS show elevated levels of CBS/CSE/3MST/Superoxide dismutase (SOD)/cystathionine/cysteine/H2S. We opine that increased levels of epigenetic gene writers (DNMTs) and decreased in gene erasers (TETs) activity cause folic acid exhaustion, leading to an increase in trans-sulphuration by CBS/CSE/3MST/SOD pathways. Thus, it is important to determine whether SIRT3 (inhibitor of HDAC3) can decrease the trans-sulfuration activity in DS patients. Since there is an increase in H3K4 and HDAC3 via epigenetics in DS, we propose that sirtuin-3 (Sirt3) may decrease H3K4 and HDAC3 and hence may be able to decrease the trans-sulfuration in DS. It would be worth to determine whether the lactobacillus, a folic acid producing probiotic, mitigates hyper-trans-sulphuration pathway in DS subjects. Further, as we know that in DS patients the folic acid is exhausted due to increase in CBS, Hcy and re-methylation. In this context, we suggest that folic acid producing probiotics such as lactobacillus might be able to improve re-methylation process and hence may help decrease the trans-sulfuration pathway in the DS patients.


Assuntos
Síndrome de Down , Sulfeto de Hidrogênio , Nefropatias , Sirtuína 3 , Criança , Humanos , Cistationina/genética , Cistationina/metabolismo , Síndrome de Down/genética , Trissomia , Cisteína , Sirtuína 3/genética , Cistationina beta-Sintase/genética , Cistationina beta-Sintase/metabolismo , Sulfeto de Hidrogênio/metabolismo , S-Adenosilmetionina , Superóxido Dismutase/metabolismo , Adenosina , Nefropatias/metabolismo , Ácido Fólico , Homocisteína , Carbono , Cistationina gama-Liase/genética , Cistationina gama-Liase/metabolismo
2.
J Environ Manage ; 301: 113792, 2022 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-34607137

RESUMO

Jaggery is a kind of unrefined non-centrifugal sugar (NCS) used mainly in Asia, Africa, Latin America, and the Caribbean. Traditionally, jaggery is produced by concentrating sugarcane juice in open pans with the help of bagasse combustion. However, due to thermal energy loss with flue gases and an unscientific approach in plant construction, jaggery plants have a poor thermal efficiency of less than 25%, poor emission characteristics, and a high bagasse consumption rate. Advanced jaggery-making techniques use solar energy and heat pumps for jaggery production. However, these techniques are in the early stage of development, and the literature indicates that these techniques should be used in conjuction with traditional ones to improve the performance of jaggery making plants. This literature review describes advances in jaggery-making methods, critically analyzed them, and provides a qualitative comparison of these methods. Further, gaps in the existing literature are identified and reported for future research direction. In addition, efforts have been made to quantify and estimate the emissions reduction and bagasse consumption potentials from the traditional jaggery industry to make this rural industry a sustainable and profitable business for rural entrepreneurs. The comparison with the recently developed clean combustion device exhibits that the harmful emissions from the jaggery industry could be reduced drastically viz. 95%-98% of PM2.5; 92%-95% of CO, and 52-60% of CO2, while saving more than 35% of bagasse consumption. Implemented at a national scale, it may reduce nearly 3% of all harmful emissions in the country, which is equally applicable elsewhere.


Assuntos
Extratos Vegetais , Saccharum , Gases , Temperatura Alta
4.
Br J Cancer ; 112(11): 1772-81, 2015 May 26.
Artigo em Inglês | MEDLINE | ID: mdl-25942396

RESUMO

BACKGROUND: FKBP51 is overexpressed in melanoma and impacts tumour cell properties. However, its comprehensive role in melanoma pathogenesis and underlying mechanism(s) remain elusive. METHODS: FKBP51 was stably silenced in aggressive melanoma cell lines and its effect examined in vitro and in mouse model. Histological/immunohistochemical analyses were performed to confirm metastasis, angiogenesis and neutrophil infiltration. Gene expression was analyzed by qRT-PCR, immunoblot and/or ELISA. NF-κB transcriptional activity and promoter binding were monitored by luciferase-based promoter-reporter and ChIP assays, respectively. Interleukin (IL)-8 inhibition was achieved by gene silencing or neutralising-antibody treatment. RESULTS: FKBP51 silencing reduced melanoma growth, metastasis, angiogenesis and neutrophil infiltration and led to IL-8 downregulation through NF-κB suppression in cell lines and tumour xenografts. IL-8 inhibition drastically decreased growth, migration and invasiveness of FKPB51-overexpressing cells; whereas its treatment partially restored the suppressed phenotypes of FKBP51-silenced melanoma cells. Interleukin-8 depletion in conditioned medium (CM) of FKBP51-overexpressing melanoma cells inhibited endothelial cell proliferation and capillary-like structure formation, whereas its treatment promoted these effects in endothelial cells cultured in CM of FKBP51-silenced melanoma cells. CONCLUSIONS: FKBP51 promotes melanoma growth, metastasis and angiogenesis, and IL-8 plays a key role in these processes. Thus, targeting of FKBP51 or its upstream or downstream regulatory pathways could lead to effective therapeutic strategies against melanoma.


Assuntos
Interleucina-8/genética , Melanoma/genética , Neovascularização Patológica/genética , Proteínas de Ligação a Tacrolimo/biossíntese , Animais , Linhagem Celular Tumoral , Proliferação de Células/genética , Regulação Neoplásica da Expressão Gênica , Humanos , Interleucina-8/metabolismo , Melanoma/patologia , Camundongos , NF-kappa B/genética , Metástase Neoplásica , Neovascularização Patológica/patologia , Regiões Promotoras Genéticas , Proteínas de Ligação a Tacrolimo/genética
5.
J Environ Manage ; 128: 83-91, 2013 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-23722177

RESUMO

Growth profile and extracellular polymeric substances (EPS) production of Serratia sp.1 was studied in shake flask fermentation for 72 h using wastewater sludge as raw material. Maximum cell concentration of 6.7 × 10(9) cfu/mL was obtained at 48 h fermentation time. EPS dry weight, flocculation activity and dewaterability of different EPS (tightly bound or TB-EPS, loosely bound or LB-EPS and broth-EPS or B-EPS) were also measured. The highest concentration of LB-EPS (2.45 g/L) and TB-EPS (0.99 g/L) were attained at 48 h of fermentation. Maximum flocculation activity and dewaterability (ΔCST) of TB-EPS (76.4%, 14.5s and 76.5%, 15.5s), LB-EPS (67.8%, 8.1s and 64.7%, 7.6s) and broth EPS (61%, 6.1s and 70.4%, 6.8s) were obtained at 36 and 48 h of growth. Higher flocculation activity and dewaterability were achieved with TB-EPS than with the two other EPS. Characterization of TB-EPS and LB-EPS was done in terms of their protein and carbohydrate content. Protein content was much higher in TB-EPS where as carbohydrate content was only slightly higher in TB-EPS than LB-EPS. Morphology of the Serratia strain after fermentation in sludge and TSB was observed under a scanning electron microscope and the cell size was found to be bigger in the sludge medium than the TSB medium.


Assuntos
Carboidratos/análise , Espaço Extracelular/metabolismo , Proteínas/metabolismo , Serratia/metabolismo , Esgotos/microbiologia , Águas Residuárias , Espaço Extracelular/química , Fermentação , Floculação , Caulim , Proteínas/análise , Serratia/crescimento & desenvolvimento
6.
Comp Funct Genomics ; 2012: 258284, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22666085

RESUMO

Takifugu rubripes is teleost fish widely used in comparative genomics to understand the human system better due to its similarities both in number of genes and structure of genes. In this work we survey the fugu genome, and, using sensitive computational approaches, we identify the repertoire of putative protein kinases and classify them into groups and subfamilies. The fugu genome encodes 519 protein kinase-like sequences and this number of putative protein kinases is comparable closely to that of human. However, in spite of its similarities to human kinases at the group level, there are differences at the subfamily level as noted in the case of KIS and DYRK subfamilies which contribute to differences which are specific to the adaptation of the organism. Also, certain unique domain combination of galectin domain and YkA domain suggests alternate mechanisms for immune response and binding to lipoproteins. Lastly, an overall similarity with the MAPK pathway of humans suggests its importance to understand signaling mechanisms in humans. Overall the fugu serves as a good model organism to understand roles of human kinases as far as kinases such as LRRK and IRAK and their associated pathways are concerned.

7.
Mol Cell Biochem ; 348(1-2): 99-108, 2011 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-21076854

RESUMO

Remodeling by its very nature implies synthesis and degradation of extracellular matrix components (such as elastin, collagen, and connexins). Most of the vascular matrix metalloproteinase (MMP) are latent because of the presence of constitutive nitric oxide (NO). However, during oxidative stress peroxinitrite (ONOO-) activates the latent MMPs and instigates vascular remodeling. Interestingly, in mesenteric artery, homocysteine (Hcy) decreases the NO bio-availability, and folic acid (FA, an Hcy-lowering agent) mitigates the Hcy-mediated mesentery artery dysfunction. Dimethylarginine dimethylaminohydrolase-2 (DDAH-2) and endothelial nitric oxide synthase (eNOS) increases NO production. The hypothesis was that the Hcy decreased NO bio-availability, in part, activating MMP, decreasing elastin, DDAH-2, eNOS and increased vasomotor response by increasing connexin. To test this hypothesis,the authors used 12-week-old C57BJ/L6 wild type (WT) and hyperhomocysteinemic (HHcy)-cystathione beta synthase heterozygote knockout (CBS+/-) mice. Blood pressure measurements were made by radio-telemetry. WT and MMP-9 knockout mice were administered with Hcy (0.67 mg/ml in drinking water). Superior mesenteric artery and mesenteric arcade were analyzed with light and confocal microscopy. The protein expressions were measured by western blot analysis. The mRNA levels for MMP-9 were measured by RT-PCR. The data showed decreased DDAH-2 and eNOS expressions in mesentery in CBS-/+ mice compared with WT mice. Immuno-fluorescence and western blot results suggest increased MMP-9 and connexin-40 expression in mesenteric arcades of CBS-/+ mice compared with WT mice. The wall thickness of third-order mesenteric artery was increased in CBS-/+ mice compared to WT mice. Hcy treatment increased blood pressure in WT mice. Interestingly, in MMP-9 KO, Hcy did not increase blood pressure. These results may suggest that HHcy causes mesenteric artery remodeling and narrowing by activating MMP-9 and decreasing DDAH-2 and eNOS expressions, compromising the blood flow, instigating hypertension, and acute abdomen pain.


Assuntos
Proteínas da Matriz Extracelular/metabolismo , Hiper-Homocisteinemia/metabolismo , Hipertensão/metabolismo , Artéria Mesentérica Superior/metabolismo , Dor Abdominal/etiologia , Amidoidrolases/metabolismo , Animais , Pressão Sanguínea , Monitorização Ambulatorial da Pressão Arterial , Western Blotting , Conexinas/metabolismo , Cistationina beta-Sintase/genética , Cistationina beta-Sintase/metabolismo , Modelos Animais de Doenças , Elasticidade , Elastina/metabolismo , Imunofluorescência , Homocisteína , Hiper-Homocisteinemia/induzido quimicamente , Hiper-Homocisteinemia/genética , Hiper-Homocisteinemia/patologia , Hiper-Homocisteinemia/fisiopatologia , Hipertensão/genética , Hipertensão/patologia , Hipertensão/fisiopatologia , Masculino , Metaloproteinase 9 da Matriz/deficiência , Metaloproteinase 9 da Matriz/genética , Artéria Mesentérica Superior/patologia , Artéria Mesentérica Superior/fisiopatologia , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , Microscopia Confocal , Microscopia de Vídeo , Óxido Nítrico Sintase Tipo III/metabolismo , Nitritos/metabolismo , RNA Mensageiro/metabolismo , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Circulação Esplâncnica , Telemetria , Resistência Vascular , Proteína alfa-5 de Junções Comunicantes
8.
Nutr Metab Cardiovasc Dis ; 21(7): 492-8, 2011 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-20227264

RESUMO

BACKGROUND AND AIMS: Homocysteine (Hcy) is a sulfur-containing, non-protein amino acid produced in the metabolic pathway of methionine. Hyperhomocysteinemia is associated with cerebro- and cardiovascular disease in industrialized countries, mostly resulting from protein rich diet and sedentary life style. Matrix metalloproteinases are involved in cardiac remodeling, leading to degradation of intercellular junctions, cardiac connexins and basement membranes. The study was designed to investigate the relationship between Hcy, cardiac remodeling, cardiac performance, and rhythm disturbances in an animal model of hyperhomocysteinemia. We tested the hypothesis that induction of matrix metalloproteinase-2 and matrix metalloproteinase-9 leads to connexin 40, connexin 43, connexin 45 expression changes contributing to decreased cardiac performance and disturbed atrioventricular conduction. METHODS AND RESULTS: Hcy was added to drinking water of male C57/BL6J mice to achieve moderate Hcy blood levels. ECG was monitored in conscious mice with a telemetric ECG device; echocardiography was used for assessment of left ventricular function. Immunoblotting was used to evaluate matrix metalloproteinase-2, matrix metalloproteinase-9, connexin 40, connexin 43, and connexin 45 expression in cardiac tissue. Animals fed Hcy showed significant prolongation of QRS, QTc, and PR intervals along with reduced left ventricular function. Western blotting showed increased expression of matrix metalloproteinase-2, matrix metalloproteinase-9 and decreased expression of connexin 40, 43, and 45. CONCLUSION: Hcy has been identified as a nutritional factor contributing to cardiovascular disease. Cardiac remodeling induced by matrix metalloproteinase-2 and matrix metalloproteinase-9 and decreased expression of connexin 40, 43, and 45 appears to play a role in the pathomechanism of atrioventricular conduction delay and ventricular dilatation in hyperhomocysteinemia.


Assuntos
Arritmias Cardíacas/etiologia , Homocisteína/efeitos adversos , Hiper-Homocisteinemia/fisiopatologia , Disfunção Ventricular Esquerda/etiologia , Animais , Doenças Cardiovasculares/etiologia , Conexinas/metabolismo , Dieta/efeitos adversos , Modelos Animais de Doenças , Ecocardiografia , Ventrículos do Coração/metabolismo , Ventrículos do Coração/fisiopatologia , Homocisteína/sangue , Hiper-Homocisteinemia/sangue , Hiper-Homocisteinemia/induzido quimicamente , Hiper-Homocisteinemia/metabolismo , Masculino , Metaloproteinase 2 da Matriz/metabolismo , Metaloproteinase 9 da Matriz/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , Condução Nervosa , Distribuição Aleatória , Telemetria , Remodelação Ventricular
9.
Mol Cell Biochem ; 321(1-2): 1-8, 2009 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-18777088

RESUMO

G protein-coupled receptors (GPCRs) are known to modulate intracellular effectors involved in cardiac function. We recently reported homocysteine (Hcy)-induced ERK-phosphorylation was suppressed by pertussis toxin (PTX), which suggested the involvement of GPCRs in initiating signal transduction. An activated GPCR undergoes down regulation via a known mechanism involving ERK, GRK2, beta-arrestin1: ERK activity increases; GRK2 activity increases; beta-arrestin1 is degraded. We hypothesized that Hcy treatment leads to GPCR activation and down regulation. Microvascular endothelial cells were treated with Hcy. Expression of phospho-ERK1 and phospho-GRK2 was determined using Western blot, standardized to ERK1, GRK2, and beta-actin. Hcy was shown to dephosphorylate GRK2, thereby enhancing the activity. The results provided further evidence that Hcy acts as an agonist to activate GPCRs, followed by their down regulation. Hcy was also shown to decrease the content of the following G proteins and other proteins: beta-arrestin1, Galpha(q/11), Galpha(12/13), G(i/o).


Assuntos
Subunidades alfa G12-G13 de Proteínas de Ligação ao GTP/metabolismo , Subunidades alfa Gi-Go de Proteínas de Ligação ao GTP/metabolismo , Subunidades alfa Gq-G11 de Proteínas de Ligação ao GTP/metabolismo , Homocisteína/metabolismo , Receptores Acoplados a Proteínas G/agonistas , Receptores Acoplados a Proteínas G/metabolismo , Transdução de Sinais/fisiologia , Animais , Células Cultivadas , Relação Dose-Resposta a Droga , Regulação para Baixo , Células Endoteliais/citologia , Células Endoteliais/efeitos dos fármacos , Células Endoteliais/fisiologia , MAP Quinases Reguladas por Sinal Extracelular/genética , MAP Quinases Reguladas por Sinal Extracelular/metabolismo , Quinase 2 de Receptor Acoplado a Proteína G/genética , Quinase 2 de Receptor Acoplado a Proteína G/metabolismo , Subunidades alfa G12-G13 de Proteínas de Ligação ao GTP/genética , Subunidades alfa Gi-Go de Proteínas de Ligação ao GTP/genética , Subunidades alfa Gq-G11 de Proteínas de Ligação ao GTP/genética , Homocisteína/farmacologia , Ratos , Receptores Acoplados a Proteínas G/genética
10.
Curr Oncol ; 26(4): 240-246, 2019 08.
Artigo em Inglês | MEDLINE | ID: mdl-31548803

RESUMO

Background: The major limitation in the use of trastuzumab therapy is cardiotoxicity. We evaluated the safety of a strategy of continuing trastuzumab in patients with breast cancer despite mild, asymptomatic left ventricular impairment. Methods: Charts of consecutive patients referred to a cardio-oncology clinic from January 2015 to March 2017 for decline in left ventricular ejection fraction (lvef), defined as a fall of 10 percentage points or more, or a value of less than 50% during trastuzumab therapy, were reviewed. The primary outcome of interest was change in lvef, measured before and during trastuzumab exposure and up to 3 times after initiation of cardiac medications during a median of 9 months. Results: All 18 patients referred for decline in lvef chose to remain on trastuzumab and were included. All patients were treated with angiotensin converting-enzyme inhibitors or beta-blockers, or both. After initiation of cardiac medications, lvef increased over time by 4.6 percentage points (95% confidence interval: 1.9 percentage points to 7.4 percentage points), approaching baseline values. Of the 18 patients, 17 (94%) were asymptomatic at all future visits. No deaths occurred in the group. Conclusions: Many patients with mildly reduced lvef and minimal heart failure symptoms might be able to continue trastuzumab without further decline in lvef, adverse cardiac events, or death when treated under the supervision of a cardiologist with close follow-up.


Assuntos
Antagonistas Adrenérgicos beta/uso terapêutico , Inibidores da Enzima Conversora de Angiotensina/uso terapêutico , Trastuzumab/efeitos adversos , Disfunção Ventricular Esquerda/tratamento farmacológico , Idoso , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/metabolismo , Feminino , Humanos , Pessoa de Meia-Idade , Receptor ErbB-2/metabolismo , Estudos Retrospectivos , Análise de Sobrevida , Trastuzumab/farmacologia , Trastuzumab/uso terapêutico , Resultado do Tratamento , Disfunção Ventricular Esquerda/induzido quimicamente , Disfunção Ventricular Esquerda/fisiopatologia , Função Ventricular Esquerda/efeitos dos fármacos
11.
Curr Oncol ; 25(Suppl 1): S151-S160, 2018 06.
Artigo em Inglês | MEDLINE | ID: mdl-29910658

RESUMO

Background: A number of clinical practice guidelines (cpgs) concerning breast cancer (bca) screening and management are available. Here, we review the strengths and weaknesses of cpgs from various professional organizations and consensus groups with respect to their methodologic quality, recommendations, and implementability. Methods: Guidelines from four groups were reviewed with respect to two clinical scenarios: adjuvant ovarian function suppression (ofs) in premenopausal women with early-stage estrogen receptor-positive bca, and use of sentinel lymph node biopsy (slnb) after neoadjuvant chemotherapy (nac) for locally advanced bca. Guidelines from the American Society of Clinical Oncology (asco); Cancer Care Ontario's Program in Evidence Based Care (cco's pebc); the U.S. National Comprehensive Cancer Network (nccn); and the St. Gallen International Breast Cancer Consensus Conference were reviewed by two independent assessors. Guideline methodology and applicability were evaluated using the agree ii tool. Results: The quality of the cpgs was greatest for the guidelines developed by asco and cco's pebc. The nccn and St. Gallen guidelines were found to have lower scores for methodologic rigour. All guidelines scored poorly for applicability. The recommendations for ofs were similar in three guidelines. Recommendations by the various organizations for the use of slnb after nac were contradictory. Conclusions: Our review demonstrated that cpgs can be heterogeneous in methodologic quality. Low-quality cpg implementation strategies contribute to low uptake of, and adherence to, bca cpgs. Further research examining the barriers to recommendations-such as intrinsic guideline characteristics and the needs of end users-is required. The use of bca cpgs can improve the knowledge-to-practice gap and patient outcomes.


Assuntos
Neoplasias da Mama/terapia , Oncologia/métodos , Oncologia/normas , Guias de Prática Clínica como Assunto , Neoplasias da Mama/epidemiologia , Feminino , Humanos , Oncologia/organização & administração , Padrões de Prática Médica/normas , Padrões de Prática Médica/estatística & dados numéricos , Sociedades Médicas/normas
12.
Cell Mol Biol (Noisy-le-grand) ; 52(5): 21-7, 2006 Dec 31.
Artigo em Inglês | MEDLINE | ID: mdl-17543202

RESUMO

The activation of peroxisome proliferator activated receptor-gamma (PPARgamma) ameliorates the homocysteine (Hcy)-induced matrix metalloproteinase (MMP) by decreasing reactive oxygen species (ROS) production. However, the mechanism by which Hcy induces ROS generation and MMP activation is unclear. We hypothesize that Hcy increases NADH oxidase (Nox-4) and decreases thioredoxin (Trx). This leads to translocation of Nox-4 into the mitochondria and decrease in Trx. In addition, activation of PPARgamma ameliorates the translocation of Nox-4 into mitochondria and MMP-9 activation. Mouse aortic vascular endothelial cells (MVEC) were cultured in the presence or absence of 100 microM Hcy. The cells were pre-treated with ciglitazone (CZ, 150 microM). Activity of PPARgamma activity was measured by electrophoretic mobility shift assay (EMSA) and antibody super shift assay. In situ generation of ROS was measured using 2,7-dichlorofluorescin (DCF) as a probe. The expression of Nox-4 and Trx were measured by quantitative real-time polymerase chain reaction (Q-RT-PCR). The translocation of Nox-4 was measured by 2-D gel analysis. To determine the levels of Nox-4 and Trx, the mitochondria and cytosol were separated and Western blot analysis was preformed. The MMP-9 activity was measured by gelatin-zymography. The results suggested that CZ activated endothelial PPARgamma in the presence of Hcy. Production of ROS was ameliorated by PPARgamma activation. Expression of Nox-4 was increased, while production of Trx was decreased by Hcy. However, the treatment with CZ normalized the levels of Nox-4 and Trx. Nox-4 was translocated into mitochondria in Hcy-treated endothelial cells. This translocation was associated with decreased production of Trx in mitochondria. The treatment with CZ blocked this translocation and increased Trx levels in mitochondria. Hcy-mediated MMP-9 activity was decreased in cells pre-treated with CZ. These results suggest that Hcy increases NADH oxidase and decreases Trx by translocation of Nox-4 to mitochondria. The data show that indeed, activation of PPARgamma ameliorates the mitochondrial translocation of NOX-4 and MMP-9 activation.


Assuntos
Células Endoteliais/efeitos dos fármacos , Homocisteína/metabolismo , Hipoglicemiantes/farmacologia , Metaloproteinase 9 da Matriz/metabolismo , Mitocôndrias/metabolismo , PPAR gama/metabolismo , Tiazolidinedionas/farmacologia , Animais , Células Cultivadas , Eletroforese em Gel Bidimensional , Células Endoteliais/citologia , Células Endoteliais/metabolismo , Ativação Enzimática , Camundongos , NADPH Oxidase 4 , NADPH Oxidases/genética , NADPH Oxidases/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Tiorredoxinas/genética , Tiorredoxinas/metabolismo
13.
Drug Res (Stuttg) ; 66(12): 633-638, 2016 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-27504866

RESUMO

Neuropathic pain is a severe and unbearable condition which arises due to activation of peripheral nociceptors after tissue damage, neuropathic pain is caused from anomalous physiology of central or peripheral nervous system and it may not be related to the ongoing tissue damage or inflammation. Involvement of oxidative damage has been reported in the pathophysiology of neuropathic pain. The purpose of this study was to examine the effect of lycopene to quench the free radicals produced as a result of the increased oxidative stress in neuropathic pain. Neuropathic pain was induced in wistar rats by partial sciatic nerve ligation. The effect was evaluated by assessing various behavioral parameters (thermal hyperalgesia, cold hyperalgesia), biochemical parameters (lipid peroxidation, reduced glutathione, superoxide dismutase and catalase) as well as histopathological parameters in sciatic nerve. During the experiment group of 8 rats each was administered drugs once daily intraperitonealy (I.P.) and naïve groups, sham group and sciatic nerve ligated group were treated with vehicle for the duration of 14 days. Partial sciatic nerve ligation (PSNL) significantly caused thermal hyperalgesia, cold hyperalgesia and oxidative damage compared to normal and sham groups. Daily administration of lycopene (25 mg/kg, 50 mg/kg) and gabapentin (100 mg/kg) considerably reversed hyperalgesia, cold hyperalgesia and attenuated oxidative stress when compared to control group. There was significant histological improvement in the in the architecture of myelinated and unmyelinated fibers. The results indicated that free radical generation mechanism might be involved in PSNL induced behavior, biochemical and histopathological changes in wistar rats.


Assuntos
Antioxidantes/farmacologia , Carotenoides/farmacologia , Nervo Isquiático/efeitos dos fármacos , Aminas/farmacologia , Animais , Catalase/metabolismo , Ácidos Cicloexanocarboxílicos/farmacologia , Gabapentina , Glutationa/metabolismo , Hiperalgesia/tratamento farmacológico , Hiperalgesia/metabolismo , Ligadura/métodos , Peroxidação de Lipídeos/efeitos dos fármacos , Licopeno , Masculino , Neuralgia/tratamento farmacológico , Neuralgia/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Medição da Dor/métodos , Ratos , Ratos Wistar , Nervo Isquiático/metabolismo , Superóxido Dismutase/metabolismo , Ácido gama-Aminobutírico/farmacologia
14.
Anaesth Rep ; 9(1): 67-68, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33898994
15.
Int J Tuberc Lung Dis ; 9(2): 188-94, 2005 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-15732739

RESUMO

SETTING: Rural area of Wardha district, Maharashtra State, Central India. OBJECTIVE: To determine the prevalence of tuberculous lymphadenitis in children aged 0-14 years in the study area and to assess factors that may contribute towards the prevalence. DESIGN: House to house survey of a population of 23,229 in 35 neighbouring villages with 7900 children aged 0-14 years from May 1993 to May 1994 and from March 1995 to February 1996. RESULTS: The prevalence of tuberculous lymphadenitis/1000 children was 4.43. The maximum prevalence was in the 5-9 years age group. The prevalence was 34 times higher in children with positive family history of tuberculosis than in those without a history. There was an association between prevalence and the living standards of the children, with a higher prevalence in families that belonged to an underprivileged social class living in thatched, improvised houses. Multiple cervical lymph nodes >2 cm and with matting and fluctuation were found to be characteristic clinical features. CONCLUSION: The prevalence of peripheral lymphadenopathy was 27.2/1000 children and that of tuberculous lymphadenitis was 4.43/1000. Positive history of contact in the family was a significant epidemiological indicator of tuberculous glands.


Assuntos
Tuberculose dos Linfonodos/epidemiologia , Adolescente , Criança , Pré-Escolar , Coleta de Dados , Feminino , Humanos , Índia/epidemiologia , Lactente , Recém-Nascido , Masculino , Prevalência , Fatores Socioeconômicos , Tuberculose/transmissão
16.
Open Neurol J ; 9: 9-14, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26157520

RESUMO

A high serum level of homocysteine, known as hyperhomocystenemia (HHcy) is associated with vascular dysfunction such as altered angiogenesis and increased membrane permeability. Epidemiological studies have found associations between HHcy and Alzheimer's disease (AD) progression that eventually leads to vascular dementia (VaD). VaD is the second most common cause of dementia in people older than 65, the first being AD. VaD affects the quality of life for those suffering by drastically decreasing their cognitive function. VaD, a cerebrovascular disease, generally occurs due to cerebral ischemic events from either decreased perfusion or hemorrhagic lesions. HHcy is associated with the hallmarks of dementia such as tau phosphorylation, Aß aggregation, neurofibrillary tangle (NFT) formation, neuroinflammation, and neurodegeneration. Previous reports also suggest HHcy may promote AD like pathology by more than one mechanism, including cerebral microangiopathy, endothelial dysfunction, oxidative stress, neurotoxicity and apoptosis. Despite the corelations presented above, the question still exists - does homocysteine have a causal connection to AD? In this review, we highlight the role of HHcy in relation to AD by discussing its neurovascular effects and amelioration with dietary supplements. Moreover, we consider the studies using animal models to unravel the connection of Hcy to AD.

17.
Int J Tuberc Lung Dis ; 3(6): 478-82, 1999 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-10383059

RESUMO

SETTING: Ashti and Karanja tahsils, Wardha district, Maharashtra State, Central India. OBJECTIVE: To find and compare the prevalence of bacillary positive pulmonary tuberculosis amongst the different tribes and in the non-tribal population. DESIGN: Prevalence study of pulmonary tuberculosis by house-to-house survey of symptoms among tribal (n = 20596) and non-tribal (n = 93 670) populations aged 5 years and over, between September 1989 and November 1990. RESULTS: The prevalence of smear and/or culture-positive tuberculosis/100000 population was 133 in the tribal and 144 in the non-tribal population. The difference in prevalence of symptomatic individuals and sputum-positive cases among the tribal and the non-tribal populations was statistically significant only in the symptomatic individuals/100000 (P = 0.01). The prevalence of cases in both groups was higher in males than females; however this difference was significant only in the tribal group (P = 0.05). Only two of the 46 tribes encountered, the Mana and Pawara tribes, showed a high prevalence, of 730 and 612/100000, respectively. The three other tribes with positive cases (the Gond group) had prevalences comparable to that of the nontribal population. CONCLUSION: The prevalence of tuberculosis in tribal people was comparable to that of the non-tribal population.


Assuntos
Etnicidade/estatística & dados numéricos , Mycobacterium tuberculosis/isolamento & purificação , Escarro/microbiologia , Tuberculose Pulmonar/diagnóstico , Tuberculose Pulmonar/epidemiologia , Adolescente , Adulto , Distribuição por Idade , Idoso , Criança , Pré-Escolar , Países em Desenvolvimento , Feminino , Inquéritos Epidemiológicos , Humanos , Índia/epidemiologia , Masculino , Pessoa de Meia-Idade , Prevalência , Fatores de Risco , Distribuição por Sexo , Taxa de Sobrevida
18.
Indian J Cancer ; 29(1): 34-6, 1992 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-1398724

RESUMO

A case of renal cell carcinoma with heterotopic bone formation occurring in a female aged 55 years has been reported. There was no haematuria and the morphological picture showed only ossified stroma and no sarcomatoid appearance.


Assuntos
Carcinoma de Células Renais/patologia , Nefropatias/patologia , Neoplasias Renais/patologia , Ossificação Heterotópica/patologia , Carcinoma de Células Renais/sangue , Carcinoma de Células Renais/complicações , Feminino , Humanos , Nefropatias/complicações , Neoplasias Renais/sangue , Neoplasias Renais/complicações , Pessoa de Meia-Idade , Ossificação Heterotópica/complicações
19.
Indian J Cancer ; 30(3): 140-2, 1993 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-8300145

RESUMO

A case of malignant change in a benign cystic tertoma of the ovary has been reported where there was double malignancy. Leiomyosarcoma was associated with squamous cell carcinoma (In situ). The patient remained well for one year after ovariotomy.


Assuntos
Carcinoma in Situ/patologia , Carcinoma de Células Escamosas/patologia , Leiomiossarcoma/patologia , Neoplasias Primárias Múltiplas/patologia , Cistos Ovarianos/patologia , Neoplasias Ovarianas/patologia , Teratoma/patologia , Feminino , Humanos , Pessoa de Meia-Idade
20.
Indian Pediatr ; 26(4): 353-7, 1989 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-2599597

RESUMO

Three hundred forty one primiparous women and their offsprings were the subjects of the study. Mothers were subjected to weight and height measurement as well as hemoglobin estimation. The weight for height ratio index (WHRI) and weight-height product index (WHPI) were calculated. Both WHRI and WHPI were studied in relation to birth weight (BW). WHPI was found to be superior over WHRI as it explained greater per cent variation in birth weight. The means for BW increased and incidence of low birth weight babies decreased significantly with increase of WHPI in each WHRI group.


Assuntos
Peso ao Nascer , Estatura , Peso Corporal , Gravidez , Feminino , Humanos , Recém-Nascido , Estado Nutricional , Estudos Prospectivos
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