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2.
Front Sociol ; 8: 1219220, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37325790

RESUMO

[This corrects the article DOI: 10.3389/fsoc.2023.1120288.].

3.
Front Sociol ; 8: 1120288, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37143959

RESUMO

As the coronavirus pandemic affects virtually every sector of the economy, this ongoing review examines the effects of remote working on women's job performance-including hypotheses about serious activities and how they may balance work and family. In recent years, psychometric testing has become increasingly popular with organizations worldwide, and they are looking at this method to better understand how women achieve balance in their lives. The aim of this work is to investigate how different aspects of psychometrics and factors relating to work-life balance influence women's satisfaction levels. An exploratory factor assessment (EFA) and a confirmatory factor assessment (CFA) using a seven-point Likert scale were performed on data collected from 385 selected female IT workers whose satisfaction levels toward psychometric assessments in their organization were examined. The current study uses EFAs and CFAs to develop and identify the key factors in women's work-life balance. The results also showed that three significant variables accounted for 74% of the variance: 26% from work and family, 24% from personal factors, and 24% from loving their job.

4.
Metabolomics ; 18(7): 51, 2022 07 11.
Artigo em Inglês | MEDLINE | ID: mdl-35819731

RESUMO

OBJECTIVE: Since the COVID-19 pandemic began in early 2020, SARS-CoV2 has claimed more than six million lives world-wide, with over 510 million cases to date. To reduce healthcare burden, we must investigate how to prevent non-acute disease from progressing to severe infection requiring hospitalization. METHODS: To achieve this goal, we investigated metabolic signatures of both non-acute (out-patient) and severe (requiring hospitalization) COVID-19 samples by profiling the associated plasma metabolomes of 84 COVID-19 positive University of Virginia hospital patients. We utilized supervised and unsupervised machine learning and metabolic modeling approaches to identify key metabolic drivers that are predictive of COVID-19 disease severity. Using metabolic pathway enrichment analysis, we explored potential metabolic mechanisms that link these markers to disease progression. RESULTS: Enriched metabolites associated with tryptophan in non-acute COVID-19 samples suggest mitigated innate immune system inflammatory response and immunopathology related lung damage prevention. Increased prevalence of histidine- and ketone-related metabolism in severe COVID-19 samples offers potential mechanistic insight to musculoskeletal degeneration-induced muscular weakness and host metabolism that has been hijacked by SARS-CoV2 infection to increase viral replication and invasion. CONCLUSIONS: Our findings highlight the metabolic transition from an innate immune response coupled with inflammatory pathway inhibition in non-acute infection to rampant inflammation and associated metabolic systemic dysfunction in severe COVID-19.


Assuntos
COVID-19 , Humanos , Inflamação , Metabolômica , Pandemias , RNA Viral , SARS-CoV-2 , Índice de Gravidade de Doença
5.
mSphere ; 6(5): e0066921, 2021 10 27.
Artigo em Inglês | MEDLINE | ID: mdl-34704776

RESUMO

Clostridioides difficile infection (CDI) is the most common hospital-acquired infection in the United States. Antibiotic-induced dysbiosis is the primary cause of susceptibility, and fecal microbiota transplantation (FMT) has emerged as an effective therapy for recurrence. We previously demonstrated in the mouse model of CDI that antibiotic-induced dysbiosis reduced colonic expression of interleukin 25 (IL-25) and that FMT protected in part by restoring IL-25 signaling. Here, we conducted a prospective study in humans to test if FMT induced IL-25 expression in the colons of patients with recurrent CDI (rCDI). Colonic biopsy specimens and blood were collected at the time of FMT and 60 days later. Colon biopsy specimens were analyzed for IL-25 protein levels, total tissue transcriptome, and epithelium-associated microbiota before and after FMT, and peripheral immune cells were immunophenotyped. FMT increased alpha diversity of the colonic microbiota and levels of IL-25 in colonic tissue. In addition, FMT increased expression of homeostatic genes and repressed inflammatory genes. Finally, circulating Th17 cells were decreased post-FMT. The increase in levels of the cytokine IL-25 accompanied by decreased inflammation is consistent with FMT acting in part to protect from recurrent CDI via restoration of commensal activation of type 2 immunity. IMPORTANCE Fecal microbiota transplantation (FMT) is an effective treatment for C. difficile infection for most patients; however, introducing a complex mixture of microbes also has had unintended consequences for some patients. Attempts to create a standardized probiotic therapeutic that recapitulates the efficacy of FMT have been unsuccessful to date. We sought to understand what immune markers are changed in patients undergoing FMT to treat recurrent C. difficile infection and identified an immune signaling molecule, IL-25, that was restored by FMT. This finding indicates that adjunctive therapy with IL-25 could be useful in treating C. difficile infection.


Assuntos
Infecções por Clostridium/terapia , Transplante de Microbiota Fecal , Microbioma Gastrointestinal/fisiologia , Interleucina-17/metabolismo , Idoso , Antibacterianos/uso terapêutico , Clostridioides difficile/efeitos dos fármacos , Clostridioides difficile/patogenicidade , Infecções por Clostridium/metabolismo , Infecções por Clostridium/microbiologia , Colo/patologia , Fezes/microbiologia , Feminino , Humanos , Inflamação/metabolismo , Inflamação/microbiologia , Inflamação/terapia , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Recidiva , Resultado do Tratamento
6.
Medicine and Health ; : 17-29, 2019.
Artigo em Inglês | WPRIM (Pacífico Ocidental) | ID: wpr-825528

RESUMO

@#Glaukoma adalah sejenis penyakit neurodegeneratif yang berlaku akibat ketidakseimbangan dalam peredaran cecair akues yang disebabkan oleh resistan pada sistem pengaliran keluar cecair tersebut. Ini meningkatkan tekanan intraokular (TIO) yang menyebabkan kerosakan pada saraf optik dan seterusnya mengakibatkan kebutaan yang kekal. Oleh kerana TIO adalah satu faktor risiko glaukoma yang boleh dikawal, ciri-ciri dan variasi tekanan sepanjang 24 jam perlu dikenalpasti sebelum rawatan dimulakan. Pemantauan TIO adalah satu aspek yang terpenting dan kritikal dalam pengurusan glaukoma. Pelbagai tindakan kawalan melalui penggunaan teknologi yang berbeza telah dan sedang dilakukan untuk pemantauan TIO yang kerap dan berterusan selama 24 jam untuk menentukan kewujudan TIO yang tinggi (peak) dan fluktuasi tekanan. Artikel ini bertujuan untuk meninjau pendekatan inovatif yang terkini serta untuk mengulas kepentingan dan kelemahan setiap teknik bagi memperolehi profil TIO selama 24 jam.

7.
Int Immunopharmacol ; 17(2): 254-9, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23747734

RESUMO

Capsaicin (CAP), a constituent of red chilli and red pepper is exposed to exert compelling anticarcinogenic effects. In the present study, we examined the anti-tumorigenic potential of CAP on benzo(a)pyrene-induced mice lung tumorigenesis by analyzing the markers of apoptosis. Intraperitoneal administration of CAP (10mg/kg body weight) to Swiss albino mice suppressed the development of lung carcinoma by amending the protein expressions of apoptotic regulators p53, Bcl-2, Bax and caspase-3. The apoptotic-inducing nature of CAP was further confirmed by DNA agarose gel electrophoresis, transmission electron microscopic study and ethidium bromide/acridine orange staining. The results obtained from the present study show that CAP inhibits the development of mice lung carcinogenesis through its ability to induce apoptosis. Our present findings provide the basis for further clinical exploration of CAP as an anti-carcinogenic compound against lung carcinogenesis.


Assuntos
Antineoplásicos Fitogênicos/administração & dosagem , Capsaicina/administração & dosagem , Neoplasias Pulmonares/tratamento farmacológico , Pulmão/efeitos dos fármacos , Animais , Apoptose , Benzo(a)pireno/farmacologia , Capsicum/imunologia , Carcinogênese , Caspase 3/metabolismo , Células Cultivadas , Fragmentação do DNA/efeitos dos fármacos , Injeções Intraperitoneais , Pulmão/patologia , Neoplasias Pulmonares/induzido quimicamente , Masculino , Camundongos , Proteína Supressora de Tumor p53/metabolismo , Proteína X Associada a bcl-2/metabolismo
8.
Inflamm Res ; 61(11): 1169-75, 2012 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-22735861

RESUMO

OBJECTIVE: Lung cancer is a serious health problem in most developed countries and its incidence rate is profusely increasing. Capsaicin, a component of red chilli and red pepper has been studied widely for its chemopreventive properties. The aim of the present study is to explore the anti-tumor activity of capsaicin against benzo(a)pyrene-induced lung tumorigenesis in Swiss albino mice. MATERIALS AND METHODS: Benzo(a)pyrene was administered orally (50 mg/kg body weight) to induce lung cancer in Swiss albino mice. Hematological study (hemoglobin content, RBC, WBC count and differential count), histochemical analysis of mast cells and Western blot analysis of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), cyclooxygenase-2 (COX-2) and nuclear factor-kappa B (NF-κB) were carried out. RESULTS: Hematological parameters and the histochemical analysis of mast cells showed abnormal changes, and the immunoblotting analysis revealed increased protein expression of TNF-α, IL-6, COX-2 and NF-κB in lung cancer-challenged mice administered with benzo(a)pyrene. Capsaicin (10 mg/kg body weight) supplementation to lung cancer bearing mice considerably prevented all the above abnormalities. CONCLUSION: The results of the present study indicate the protective effect of capsaicin against benzo(a)pyrene-induced lung carcinogenesis in mice.


Assuntos
Antineoplásicos/uso terapêutico , Capsaicina/uso terapêutico , Neoplasias Pulmonares/tratamento farmacológico , Animais , Antineoplásicos/farmacologia , Benzo(a)pireno , Contagem de Células Sanguíneas , Capsaicina/farmacologia , Ciclo-Oxigenase 2/imunologia , Interleucina-6/imunologia , Neoplasias Pulmonares/sangue , Neoplasias Pulmonares/induzido quimicamente , Neoplasias Pulmonares/imunologia , Masculino , Mastócitos/citologia , Mastócitos/efeitos dos fármacos , Camundongos , NF-kappa B/imunologia , Fator de Necrose Tumoral alfa/imunologia
9.
Hum Exp Toxicol ; 30(8): 952-64, 2011 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-21056953

RESUMO

Sirupeellai samoola kudineer (SK), a polyherbal decoction, has been used in Siddha system of medicine for the management of Urolithiasis. Since, there exists no documentation of preclinical toxicological evaluation of SK earlier, in the present study, acute and subacute toxicity of SK was assessed in Sprague Dawley rats as per OECD guideline 423 and 407, respectively. In the acute toxicity study, SK did not produce any toxic signs at a dose level of 50 ml/kg b.wt/p.o. Three doses of SK (4.5, 9.0, 18.0 ml/kg b.wt) were administered and observed for various behavioral, physiological, biochemical, and haematological changes for 28 days in the subacute toxicity study. Low and mid dose of SK (4.5 and 9.0 ml/kg b.wt) did not exhibit any significant physiological and haematological alterations. Whereas, high dose (18.0 ml/kg bw) treatment exhibited significant changes in creatinine, gamma glutamyl transferase (GGT) and acid phosphatase (ACP) levels in serum. Further, histopathological examinations of brain, heart, liver, kidney and sex organs revealed normal architecture signifying no morphological changes upto a dose of 9.0 ml/kg. However, 18.0 ml/kg of SK administration showed few histopathological changes as compared to the control. Based on these results, it can be concluded that Sirupeellai samoola kudineer is safe and non-toxic upto 9.0 ml/kg for 28 days in experimental rats.


Assuntos
Medicina Tradicional , Extratos Vegetais/toxicidade , Preparações de Plantas/toxicidade , Urolitíase/tratamento farmacológico , Animais , Encéfalo/efeitos dos fármacos , Encéfalo/patologia , Relação Dose-Resposta a Droga , Feminino , Índia , Rim/efeitos dos fármacos , Rim/patologia , Masculino , Miocárdio/patologia , Nível de Efeito Adverso não Observado , Extratos Vegetais/isolamento & purificação , Extratos Vegetais/uso terapêutico , Preparações de Plantas/isolamento & purificação , Preparações de Plantas/uso terapêutico , Ratos , Ratos Sprague-Dawley , Testes de Toxicidade Aguda , Testes de Toxicidade Subaguda
10.
Indian J Hum Genet ; 17(3): 164-8, 2011 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-22345987

RESUMO

BACKGROUND: Genetic variants of the organic cation transporter (OCT1) gene could influence interindividual variation in clinical response to metformin therapy. The genetic basis for the single-nucleotide polymorphism (SNP) of OCT1 gene has been established in other populations, but it remains to be elucidated in the Indian population. This study is focused on OCT1 gene variants rs2282143 (P341L, 1022C>T), rs628031 (M408V, 1222A>G) and rs622342 (1386C>A) frequency distributions in the South Indian Tamilian population. MATERIALS AND METHODS: A total of 112 unrelated healthy subjects of South Indian Tamilian origin, aged 18-60 years, of either sex were recruited for the study. Genotyping was determined using the quantitative real time-polymerase chain reaction and polymerase chain reaction followed by restriction fragment length polymorphism methods. RESULTS: Allele frequencies of rs2282143, rs628031and rs622342 polymorphisms were 8.9%, 80.3% and 24.5%, respectively. Interethnic differences in the genotype and allele frequencies of OCT1 gene polymorphism were observed when compared with other major populations. The SNPs rs2282143, T allele and rs628031, G allele were more common in Asians (5.5-16.8% and 76.2-81%) and African Americans (8.2% and 73.5%) than in Caucasians (0-2% and 57.4-60%). CONCLUSION: This is the first time the frequency of OCT1 gene polymorphism was determined in the Indian population, and is similar to the frequencies observed in African-Americans and other Asian populations but different from those in Caucasians. The data observed in this study would justify further pharmacogenetic studies to potentially evaluate the role of OCT1 gene polymorphism in the therapeutic efficacy of metformin.

11.
Hum Exp Toxicol ; 29(9): 705-19, 2010 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-20144955

RESUMO

The protective effect of green tea (Camellia sinensis) was tested against arsenic-induced toxicity. However, the possible role of tannins in green tea in alleviating hepatic and renal oxidative injury has also been studied. Administration of sodium arsenite (100 mg/kg/day) for 28 days in Sprague Dawley female rats resulted in significant reduction of biochemical parameters such as delta-aminolevulinic acid dehydratase (ALAD), reduced glutathione (GSH), glutathione peroxidase (GPx), superoxide dismutase (SOD) and elevation of thiobarbituric acid reactive substances (TBARS) and the index of nitrite/nitrate (NOx) levels. The tissue arsenic burden was increased after arsenic exposure for a period of 28 days. Green tea crude fraction (GTC) co-treated with sodium arsenite for 28 days caused significant (p < .01) elevation of ALAD, GSH, GPx, SOD, and nitrate/nitrite levels and reduction of the TBARS level and tissue burden when compared to detannified green tea fraction (GTDT)-treated groups. The protective role of tannin-rich fraction of C. sinensis when compared to the detannified fraction was also confirmed by histological examinations. The greater activity of GTC than that of detannified green tea fraction correlates with the higher content of tannins in green tea. Overall, these results indicate that the tannin-rich green tea could have improved the defense mechanism against arsenic-induced oxidative stress and reduced the tissue arsenic burden.


Assuntos
Arsênio/análise , Arsênio/toxicidade , Camellia sinensis/química , Rim/química , Fígado/química , Substâncias Protetoras/uso terapêutico , Taninos/uso terapêutico , Animais , Arsênio/administração & dosagem , Intoxicação por Arsênico/tratamento farmacológico , Arsenitos/administração & dosagem , Arsenitos/toxicidade , Biomarcadores/metabolismo , Doença Hepática Induzida por Substâncias e Drogas/prevenção & controle , Relação Dose-Resposta a Droga , Feminino , Rim/efeitos dos fármacos , Rim/metabolismo , Rim/patologia , Fígado/efeitos dos fármacos , Fígado/metabolismo , Fígado/patologia , Estresse Oxidativo/efeitos dos fármacos , Fitoterapia , Extratos Vegetais/química , Extratos Vegetais/isolamento & purificação , Extratos Vegetais/uso terapêutico , Folhas de Planta/química , Sintase do Porfobilinogênio/metabolismo , Substâncias Protetoras/química , Substâncias Protetoras/isolamento & purificação , Distribuição Aleatória , Ratos , Ratos Sprague-Dawley , Insuficiência Renal/induzido quimicamente , Insuficiência Renal/prevenção & controle , Compostos de Sódio/administração & dosagem , Compostos de Sódio/toxicidade , Taninos/análise , Taninos/isolamento & purificação
12.
Biol Trace Elem Res ; 138(1-3): 212-25, 2010 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-20165931

RESUMO

Copper is known as Gunma Kaalan in Siddha literature, which means that the drug is effective for healing ulcers. The herbomineral drug "Thamira parpam" is prepared by calcining the purified copper foils with rock salt, lime juice, bracteated birth wort juice, and Alangium root decoction according to Siddha medicine. Our study investigated the possible role of Thamira parpam (TP) in the management of cysteamine-induced duodenal ulcers. Cysteamine (400 mg kg(-1) body weight(-1), two doses at 4 h interval) orally given to rats resulted in high ulcer index, increased TBARS with concomitant depletion of antioxidants such as superoxide dismutase, glutathione, glutathione peroxidase, and inflammatory markers cathepsin D, and myeloperoxidase (p < 0.01). Herbomineral drug TP (0.5, 1, and 2 mg/kg, p.o.) challenged with cysteamine attenuated the elevation of TBARS and imbalance of antioxidants. In the increases in liver inflammatory markers, tissue histopathology changes were not severe in TP treatment. Positive control omeprazole (25 mg/kg, body weight, orally) showed considerable protection against anomaly in biochemical parameters and tissue histology. Hence, our results indicate that the attenuation of oxidative stress by the herbomineral drug in experimentally induced damage to liver and duodenum of rats could be mediated by free radical quenching property.


Assuntos
Cisteamina/toxicidade , Úlcera Duodenal/induzido quimicamente , Duodeno/metabolismo , Fígado/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Extratos Vegetais/farmacologia , Animais , Peso Corporal/efeitos dos fármacos , Catepsina D/metabolismo , Úlcera Duodenal/metabolismo , Duodeno/efeitos dos fármacos , Glutationa/metabolismo , Peroxidação de Lipídeos/efeitos dos fármacos , Fígado/efeitos dos fármacos , Peroxidase/metabolismo , Protetores contra Radiação/toxicidade , Ratos , Superóxido Dismutase/metabolismo
13.
Mol Cell Biochem ; 331(1-2): 135-43, 2009 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-19449198

RESUMO

Lung cancer is currently a leading cause of death all over the world. Environmental risk factors, particularly genotoxic chemicals such as polycyclic aromatic hydrocarbons (PAH), are likely to account for a much higher mortality. Xenobiotic metabolizing enzymes are potentially chief determinants in both the susceptibility to the mutagenic effects of chemical carcinogens and in the response of tumors to chemotherapy. The well-known carcinogen benzo(a)pyrene (B(a)P) of PAH family was given orally (50 mg/kg body weight) to induce lung cancer in Swiss albino mice. B(a)P induction altered the levels of cytochromes (P450, b5), activities of phase I biotransformation enzymes (NADPH-cytochrome P450 reductase, NADH-cytochrome b5 reductase and epoxide hydrolase), phase II enzymes (glutathione-S-transferase, UDP-glucuronyl transferase and DT-diaphorase), and the levels of serum tumor markers. Treatment with capsaicin (CAP) (10 mg/kg body weight) to the lung carcinoma mice restored back the activities of phase I and II biotransformation enzymes and the levels of tumor markers to near normalcy. The above findings were substantiated by immunoblotting and immunohistochemical analysis of cytochrome P450 1A1 (CYP1A1) in the lung tissues. Our present study unravels that CAP can effectively detoxify the carcinogens which discloses its anti-carcinogenic effect during experimental lung cancer.


Assuntos
Biomarcadores Tumorais/sangue , Capsaicina/uso terapêutico , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/enzimologia , Neoplasias Experimentais/tratamento farmacológico , Neoplasias Experimentais/enzimologia , Xenobióticos/metabolismo , Animais , Capsaicina/farmacologia , Citocromo P-450 CYP1A1/metabolismo , Citocromos b5/metabolismo , Ensaios de Seleção de Medicamentos Antitumorais , Imuno-Histoquímica , Pulmão/efeitos dos fármacos , Pulmão/enzimologia , Pulmão/patologia , Neoplasias Pulmonares/sangue , Masculino , Desintoxicação Metabólica Fase I , Desintoxicação Metabólica Fase II , Camundongos , Microssomos Hepáticos/efeitos dos fármacos , Microssomos Hepáticos/enzimologia , Neoplasias Experimentais/sangue
14.
Eur J Clin Nutr ; 63(10): 1206-12, 2009 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-19471290

RESUMO

BACKGROUND/OBJECTIVES: There is a high prevalence of diabetes mellitus associated with insulin resistance in Indian adults, probably due to an inappropriately high accumulation of body fat at lower body mass indices (BMIs, kg/m(2)), as well as to a lower skeletal muscle mass. Although skeletal muscle is an important site of glucose disposal, the strength of its association with insulin sensitivity (IS) is unknown in the Indian population. SUBJECTS/METHODS: This was a cross-sectional study performed to assess the association of body fat, muscle and muscle function with IS in 51 young, healthy, nonobese Indian men with BMI ranging from 15 to 25 kg/m(2), using hyperinsulinemic euglycemic clamp method. RESULTS: The median IS was 5.32 (mg/(kg min))/(microU/ml), lower, upper quartile, 4.03, 6.56); (SI units: 4.25, lower, upper quartile, 3.22, 5.24 (micromol/(kg min))/(pmol/l)). A multiple linear regression of the natural log transformed value of IS on BMI and body muscle mass measured as the appendicular lean soft tissue (expressed as a percentage of body weight) explained 49% of the variance in IS. Independently, body fat percent and muscle (handgrip) strength showed significant bivariate correlations with IS (rho=-0.61, P<0.001; rho=0.32, P=0.027, respectively), although these variables did not enter into the multiple regression. CONCLUSIONS: BMI and body fat have been shown to be inversely related to IS at higher BMIs. This study indicates that a relative increase in BMI and reduced muscle mass and possibly function are also associated with reduced IS in lean Indian men.


Assuntos
Povo Asiático , Composição Corporal/fisiologia , Resistência à Insulina , Insulina/metabolismo , Músculo Esquelético/fisiologia , Absorciometria de Fóton , Adolescente , Adulto , Glicemia/metabolismo , Índice de Massa Corporal , Calorimetria Indireta , Técnica Clamp de Glucose , Humanos , Masculino , Força Muscular/fisiologia , Músculo Esquelético/anatomia & histologia , Músculo Esquelético/metabolismo , Consumo de Oxigênio , Adulto Jovem
15.
Nat Prod Res ; 23(8): 763-74, 2009.
Artigo em Inglês | MEDLINE | ID: mdl-19418359

RESUMO

In the present study, we have assessed the chemopreventive effect of capsaicin (CAP) on glucose metabolism with reference to blood glucose and liver glycogen levels, key glycolytic, and gluconeogenic enzymes along with electron transport chain (ETC) complexes during benzo(a)pyrene (B(a)P)-induced lung cancer in Swiss albino mice. B(a)P (50 mg kg(-1) body weight)-induced lung cancer animals showed marked decline in blood glucose levels, glycogen levels, elevations in the activities of key glycolytic enzymes (hexokinase, phosphoglucoisomerase and aldolase), and gluconeogenic enzymes (glucose-6-phosphatase and fructose-6-phosphatase) together with a decrease in the activities of ETC complexes. Supplementation of CAP (10 mg kg(-1) body weight) inhibited all the above alterations during lung cancer and restored near normalcy. Histochemical analysis by periodic acid Schiff's staining further confirmed the biochemical findings that highlighted the chemopreventive action of CAP during B(a)P-induced experimental lung tumourigenesis.


Assuntos
Antipruriginosos/farmacologia , Glicemia/efeitos dos fármacos , Capsaicina/farmacologia , Neoplasias Pulmonares/induzido quimicamente , Neoplasias Pulmonares/tratamento farmacológico , Animais , Benzo(a)pireno/farmacologia , Frutose-Bifosfatase/metabolismo , Glicogênio/metabolismo , Fígado/efeitos dos fármacos , Fígado/metabolismo , Pulmão/efeitos dos fármacos , Pulmão/metabolismo , Pulmão/patologia , Neoplasias Pulmonares/metabolismo , Masculino , Camundongos , Monoéster Fosfórico Hidrolases/metabolismo
16.
Arch Pharm Res ; 32(2): 229-34, 2009 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-19280153

RESUMO

Spices and vegetables possess antioxidant activity that can be applied for preservation of lipids and lower lipid peroxidation in biological systems. In the present study, we have investigated the effect of capsaicin on lipid metabolism during benzo(a)pyrene induced lung cancer in Swiss albino mice. Benzo(a)pyrene (50 mg/kg wt) induced lung cancer animals showed abnormal changes in the tissue and serum lipids, lipoproteins and lipid metabolizing enzymes. Treatment with capsaicin (10 mg/kg body wt) remarkably attenuated all the above alterations and restored normalcy. These findings reveal the chemomodulatory potential of capsaicin in attenuating the alterations in lipid metabolism during experimental lung carcinogenesis.


Assuntos
Capsaicina/uso terapêutico , Metabolismo dos Lipídeos/efeitos dos fármacos , Neoplasias Pulmonares/metabolismo , Animais , Benzo(a)pireno , Capsaicina/administração & dosagem , Peroxidação de Lipídeos/efeitos dos fármacos , Lipídeos/sangue , Pulmão/efeitos dos fármacos , Pulmão/enzimologia , Pulmão/metabolismo , Neoplasias Pulmonares/sangue , Masculino , Camundongos
17.
Cell Prolif ; 42(2): 229-40, 2009 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-19317806

RESUMO

OBJECTIVES: The aim of this study was to investigate mechanisms involved in the growth inhibitory effect of silymarin, in humanhepatocellular carcinoma. MATERIALS AND METHODS: The human hepatocellular carcinoma cell line HepG2 was utilized and the MTT assay was performed to study the antiproliferative effect of silymarin. Dual staining was undertaken for ethidium bromide/acridine orange, propidium iodide staining and DNA fragmentation studies were executed to confirm the presence of apoptosis. Cell-cycle analysis was revealed by flow cytometry and mitochondrial transmembrane potential was measured by uptake of the mitochondrial-specific lipophilic cationic dye rhodamine 123. Western blotting analysis for cytochrome c, p53, Bax, Bcl-2, APAF-1, caspase-3, survivin, beta-catenin, cyclin D1, c-Myc and PCNA was carried out. RESULTS: Silymarin inhibited population growth of the hepatocellular carcinoma cells in a dose-dependent manner, and the percentage of apoptotic cells was increased after treatment with 50 and 75 microg/ml silymarin for 24 h. Silymarin treatment increased the proportion of cells with reduced DNA content (sub-G(0)/G(1) or A(0) peak), indicative of apoptosis with loss of cells in the G(1) phase. Silymarin also decreased mitochondrial transmembrane potential of the cells, thereby increasing levels of cytosolic cytochrome c while up-regulating expression of pro-apoptotic proteins (such as p53, Bax, APAF-1 and caspase-3) with concomitant decrease in anti-apoptotic proteins (Bcl-2 and survivin) and proliferation-associated proteins (beta-catenin, cyclin D1, c-Myc and PCNA). CONCLUSIONS: Our results demonstrate that silymarin treatment inhibited proliferation and induced apoptosis in the human hepatocellular carcinoma cell line HepG2.


Assuntos
Apoptose/efeitos dos fármacos , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Hepáticas/patologia , Silimarina/farmacologia , Fator Apoptótico 1 Ativador de Proteases/metabolismo , Caspase 3/metabolismo , Ciclo Celular/efeitos dos fármacos , Linhagem Celular Tumoral , Núcleo Celular/efeitos dos fármacos , Proliferação de Células/efeitos dos fármacos , Ciclina D1/metabolismo , Citocromos c/metabolismo , Fragmentação do DNA/efeitos dos fármacos , Relação Dose-Resposta a Droga , Flavonoides/farmacologia , Expressão Gênica/efeitos dos fármacos , Humanos , Proteínas Inibidoras de Apoptose , Neoplasias Hepáticas/metabolismo , Potencial da Membrana Mitocondrial/efeitos dos fármacos , Proteínas Associadas aos Microtúbulos/metabolismo , Mitocôndrias/efeitos dos fármacos , Mitocôndrias/metabolismo , Antígeno Nuclear de Célula em Proliferação/metabolismo , Proteínas Proto-Oncogênicas c-bcl-2/metabolismo , Proteínas Proto-Oncogênicas c-myc/metabolismo , Survivina , Proteína Supressora de Tumor p53/metabolismo , Proteína X Associada a bcl-2/metabolismo , beta Catenina/metabolismo
18.
Fundam Clin Pharmacol ; 23(1): 97-103, 2009 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-19207542

RESUMO

The objective of the present study was to investigate whether lysosome is a target in benzo(a)pyrene-induced, oxidative stress-mediated lung cancer in Swiss albino mice and the plausible role of the phytochemical substance capsaicin in mitigating lysosomal damage. Oxidative stress was assessed based on the level of carbonyl content. The activities of lysosomal proteases like cathepsin-D, cathepsin-B, beta-D-glucosidase, beta-D-galactosidase, beta-D-glucuronidase, beta-D-N-acetylglucosaminidase and acid phosphatase were assessed to evaluate lysosomal function. Administration of benzo(a)pyrene (50 mg/kg body weight) to mice induced a increase in the activities of lysosomal enzymes and oxidative stress was evident by the increase in carbonyl content. Treatment with capsaicin (10 mg/kg body weight) decreased carbonyl content and restored the activities of lysosomal enzymes to near normalcy. Transmission electron microscopic study of lysosomes further showed the defensive action of capsaicin against the lysosomal damage caused in benzo(a)pyrene-induced lung cancer. From the present study, it can be concluded that lysosomal damage is an indispensable event in benzo(a)pyrene-induced lung cancer, and capsaicin was able to effectively prevent it, which proves the chemoprotective effect of capsaicin against benzo(a)pyrene-induced experimental lung carcinogenesis.


Assuntos
Benzo(a)pireno/toxicidade , Capsaicina/farmacologia , Neoplasias Pulmonares/prevenção & controle , Lisossomos/efeitos dos fármacos , Animais , Anticarcinógenos/farmacologia , Carcinógenos/toxicidade , Neoplasias Pulmonares/induzido quimicamente , Lisossomos/enzimologia , Masculino , Camundongos , Microscopia Eletrônica de Transmissão , Estresse Oxidativo/efeitos dos fármacos , Peptídeo Hidrolases/efeitos dos fármacos , Peptídeo Hidrolases/metabolismo
19.
J Pharm Pharmacol ; 60(6): 803-8, 2008 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-18498718

RESUMO

This study was designed to examine the impact of a principal component of hot red peppers and chilli peppers, capsaicin, on alterations in lipid peroxidation, membrane-bound enzyme profiles and glycoprotein levels during benzo(a)pyrene (BP)-induced lung cancer in Swiss albino mice. BP (50 mgkg(-1)) induced deleterious changes that were that revealed by alterations in lipid peroxidation, membrane-bound enzyme (Na+/K+ ATPase, Ca2+ ATPase and Mg2+ ATPase) activity, levels of total protein and protein-bound carbohydrate components (sialic acid, hexose, hexosamine, hexuronic acid and fucose). Pre-co-treatment with capsaicin (10 mg kg(-1)) restored the detrimental effects induced by BP, indicating its protective role in BP-induced lung cancer.


Assuntos
Anticarcinógenos/farmacologia , Capsaicina/farmacologia , Membrana Celular/efeitos dos fármacos , Neoplasias Pulmonares/prevenção & controle , Animais , Benzo(a)pireno/toxicidade , ATPase de Ca(2+) e Mg(2+)/efeitos dos fármacos , ATPase de Ca(2+) e Mg(2+)/metabolismo , ATPases Transportadoras de Cálcio/efeitos dos fármacos , ATPases Transportadoras de Cálcio/metabolismo , Carcinógenos/toxicidade , Membrana Celular/enzimologia , Glicoproteínas/efeitos dos fármacos , Glicoproteínas/metabolismo , Peroxidação de Lipídeos/efeitos dos fármacos , Neoplasias Pulmonares/induzido quimicamente , Masculino , Camundongos , ATPase Trocadora de Sódio-Potássio/efeitos dos fármacos , ATPase Trocadora de Sódio-Potássio/metabolismo
20.
Phytother Res ; 22(4): 529-33, 2008 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-18338764

RESUMO

The effect of a pungent ingredient of red pepper, capsaicin, on oxidative stress induced changes in the antioxidant defense system by benzo(a)pyrene in the lungs of mice was studied. Oral gavage administration of benzo(a)pyrene (50 mg/kg body weight) to mice led to a marked increase in oxidative stress indicated by alterations in pulmonary lipid peroxidation, enzymic antioxidants (superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase, glutathione-S-transferase and glucose-6-phosphate dehydrogenase) and non-enzymic antioxidants (reduced glutathione, vitamin C, vitamin E and vitamin A). Pre-co-treatment with capsaicin (10 mg/kg body weight i.p.) restored cellular normalcy, highlighting the antioxidant potential of capsaicin in mitigating the oxidative stress mediated damage produced during benzo(a)pyrene-induced lung cancer.


Assuntos
Antioxidantes/metabolismo , Capsaicina/farmacologia , Neoplasias Pulmonares/prevenção & controle , Pulmão/efeitos dos fármacos , Animais , Ácido Ascórbico/metabolismo , Benzo(a)pireno , Catalase/metabolismo , Glucosefosfato Desidrogenase/metabolismo , Glutationa/metabolismo , Glutationa Peroxidase/metabolismo , Glutationa Redutase/metabolismo , Glutationa Transferase/metabolismo , Peroxidação de Lipídeos/efeitos dos fármacos , Pulmão/metabolismo , Pulmão/patologia , Neoplasias Pulmonares/induzido quimicamente , Neoplasias Pulmonares/metabolismo , Masculino , Camundongos , Estresse Oxidativo/efeitos dos fármacos , Superóxido Dismutase , Vitamina A/metabolismo , Vitamina E/metabolismo
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