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Purpose: Secondary infections (SI) in COVID-19 have been documented from 3.6% to 72% in various studies with mortality ranging from 8.1% to 57.6%. There is a gap in knowledge for clinico-epidemio-microbilogical association among COVID-19 patients with concomitant SI. Patients and Methods: This is a retrospective chart review, in central India. The study was undertaken for hospitalized adult patients during 1st June 2020 to 30th November 2020, with laboratory proven COVID-19 infection and secondary infection. Results: Out of the total 2338 number of patients, only 265 (11.3%) patients were investigated for microbiological identification of SI. Male gender was predominant (76.8%) and the mean age was 53.7 ± 17.8 years. Only 3.5% (82/2338) of patients were having microbiologically confirmed (bacterial or fungal) SI. The overall mortality was 50.9% (54/82) with a differential mortality of 88.8% (48/54) in high-priority areas and 21.4% (6/28) in low-priority areas. Blood was the most commonly investigated sample (56%) followed by urine (20.7%) and respiratory secretion (15.8%). A. baumanii complex (20/82, 24.3%) was the most common bacteria isolated followed by K. pneumonia (12/82, 14.6%) and E. coli (11/82, 13.4%). Candida spp. (20/82, 24.3%) was the most common fungal pathogen isolated. Sixty percent (12/20) of Acinetobacter spp. were carbapenam-resistant and 70.3% of Enterobacterales were carbapenam-resistant. Fluconazole resistant Candid a spp. was isolated only in 10% (2/20) of cases. Diabetes was the most common co-morbidity 54.8% (45/82) followed by hypertension (41.4%) and chronic heart disease (13.4%). The negative predictors of secondary infections are urinary catheterization, placement of central line and mechanical ventilation (invasive and non-invasive). Conclusion: There is an urgent need of better anti-microbial stewardship practices in India (institutional and extra institutional) for curtailment of secondary infection rates particularly among COVID-19 patients.
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We used data from 660 people living with HIV in southern India to evaluate the reliability, validity, and factor structure of the Internalized AIDS-Related Stigma Scale. Exploratory factor analysis revealed the presence of 2 factors: a 2-item factor related to disclosure concerns and a 4-item factor related to self-hatred. The self-hatred factor demonstrated acceptable internal consistency (Cronbach α = .80). As evidence of construct validity, both factors were correlated with depression symptom severity as measured by the Patient Health Questionnaire-9. Further study is needed to understand the correlates of these factors and their impact on the Indian HIV care continuum.
Assuntos
Síndrome da Imunodeficiência Adquirida/psicologia , Escala de Avaliação Comportamental , Infecções por HIV/psicologia , Estigma Social , Síndrome da Imunodeficiência Adquirida/epidemiologia , Adulto , Depressão , Feminino , Infecções por HIV/epidemiologia , Humanos , Índia/epidemiologia , Masculino , Pessoa de Meia-Idade , Reprodutibilidade dos Testes , Estatísticas não Paramétricas , Inquéritos e Questionários , Pessoas TransgêneroRESUMO
The US South Asian population has grown tremendously, and is now over 2.5 million. South Asians often face tremendous cultural, socioeconomic, linguistic and structural obstacles to good health, and face staggering cardiovascular disease (CVD) and cancer risk. Coupled with this is a paucity of detailed data on the population's unique CVD and cancer risk profiles, etiologic mechanisms, and effective interventions to address South Asian health disparities. This data gap compelled an initiative to develop more targeted research and evidence-based practice and policy approaches. The South Asian Health Initiative (SAHI), a community based participatory research partnership between the Immigrant Health and Cancer Disparities Center at Memorial Sloan Kettering Cancer and the South Asian Council for Social Services (SACSS), and the Palo Alto Medical Foundation Research Institute thus partnered to effect the first national South Asian translational research endeavor, South Asian Health: From Research to Practice and Policy, summarized in this paper.
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Asiático/estatística & dados numéricos , Pesquisa Participativa Baseada na Comunidade/organização & administração , Atenção à Saúde/organização & administração , Política de Saúde/legislação & jurisprudência , Disparidades em Assistência à Saúde/etnologia , Feminino , Planejamento em Saúde/organização & administração , Humanos , Masculino , Inovação Organizacional , Formulação de Políticas , Pesquisa Translacional Biomédica/organização & administração , Estados UnidosRESUMO
Addressing mental illness requires a culturally sensitive approach. As detailed in this literature review, treating mental illness in the South Asian immigrant community necessitates a thorough understanding of the South Asian conceptualization of mental illness. Past research, though limited, has described the different reasons the South Asian community attributes to causing mental illness, as well as the stigma associated with acknowledging the disease. Acculturation of the community also plays a significant role in cultural acceptability and the receipt of quality care. Lessons from local organizations can be applied at the national level to promote cultural responsiveness in treating mental illness in the South Asian immigrant community.
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Asiático/estatística & dados numéricos , Emigrantes e Imigrantes/psicologia , Transtornos Mentais/diagnóstico , Transtornos Mentais/etnologia , Serviços de Saúde Mental/estatística & dados numéricos , Aculturação , Adulto , Idoso , Feminino , Humanos , Masculino , Saúde Mental/etnologia , Pessoa de Meia-Idade , Avaliação das Necessidades , Índice de Gravidade de Doença , Estresse Psicológico/epidemiologia , Estados UnidosRESUMO
OBJECTIVE: To promote use of progestogen therapy to reduce premature births in Ohio by 10%. METHODS: The Ohio Perinatal Quality Collaborative initiated a quality improvement project in 2014 working with clinics at 20 large maternity hospitals, Ohio Medicaid, Medicaid insurers, and service agencies to use quality improvement methods to identify eligible women and remove treatment barriers. The number of women eligible for prophylaxis, the percent prescribed a progestogen before 20 and 24 weeks of gestation, and barriers encountered were reported monthly. Clinics were asked to adopt protocols to identify candidates and initiate treatment promptly. System-level changes were made to expand Medicaid eligibility, maintain Medicaid coverage during pregnancy, improve communication, and adopt uniform data collection and efficient treatment protocols. Rates of singleton births before 32 and 37 weeks of gestation in Ohio hospitals were primary outcomes. We used statistical process control methods to analyze change and generalized linear mixed models to estimate program effects accounting for known risk factors. RESULTS: Participating sites tracked 2,562 women eligible for treatment between January 1, 2014, and November 30, 2015. Late entry to care, variable interpretation of treatment guidelines, maintenance of Medicaid coverage, and inefficient communication among health care providers and insurers were identified as treatment barriers. Births before 32 weeks of gestation decreased in all hospitals by 6.6% and in participating hospitals by 8.0%. Births before 32 weeks of gestation to women with prior preterm birth decreased by 20.5% in all hospitals, by 20.3% in African American women, and by 17.1% in women on Medicaid. Births before 37 weeks of gestation were minimally affected. Adjusting for risk factors and birth clustering by hospital confirmed a program-associated 13% (95% confidence interval 0.3-24%) reduction in births before 32 weeks of gestation to women with prior preterm birth. CONCLUSION: The Ohio progestogen project was associated with a sustained reduction in singleton births before 32 weeks of gestation in Ohio.
Assuntos
Promoção da Saúde/estatística & dados numéricos , Maternidades/estatística & dados numéricos , Nascimento Prematuro/prevenção & controle , Progestinas/uso terapêutico , Adulto , Negro ou Afro-Americano/estatística & dados numéricos , Feminino , Idade Gestacional , Promoção da Saúde/métodos , Humanos , Medicaid/estatística & dados numéricos , Ohio/epidemiologia , Gravidez , Nascimento Prematuro/epidemiologia , Avaliação de Programas e Projetos de Saúde , Estados UnidosRESUMO
Exposure to fine particulate matter (PM2.5) and black carbon (BC) have been linked to negative health risks, but exposure among professional taxi drivers is understudied. This pilot study measured drivers' knowledge, attitudes, and beliefs (KAB) about air pollution compared with direct measures of exposures. Roadside and in-vehicle levels of PM2.5 and BC were continuously measured over a single shift on each subject, and exposures compared with central site monitoring. One hundred drivers completed an air pollution KAB questionnaire, and seven taxicabs participated in preliminary in-cab air sampling. Taxicab PM2.5 and BC concentrations were elevated compared with nearby central monitoring. Average PM2.5 concentrations per 15-min interval were 4-49 µg/m3. BC levels were also elevated; reaching>10 µg/m3. Fifty-six of the 100 drivers surveyed believed they were more exposed than non-drivers; 81 believed air pollution causes health problems. Air pollution exposures recorded suggest that driver exposures would likely exceed EPA recommendations if experienced for 24 h. Surveys indicated that driver awareness of this was limited. Future studies should focus on reducing exposures and increasing awareness among taxi drivers.
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Poluentes Atmosféricos/análise , Conhecimentos, Atitudes e Prática em Saúde , Exposição Ocupacional/análise , Material Particulado/análise , Fuligem/análise , Emissões de Veículos/análise , Adolescente , Adulto , Poluição do Ar/análise , Automóveis , Emigração e Imigração , Monitoramento Ambiental/métodos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Cidade de Nova Iorque , Percepção , Projetos Piloto , Inquéritos e Questionários , Adulto JovemRESUMO
Psychosocial conditions such as depression, intimate partner violence (IPV), and history of childhood sexual abuse (CSA) have been associated with poor HIV-related outcomes. In India, which has the third largest HIV epidemic in the world, little is understood about the impact of psychosocial conditions on people living with HIV (PLHIV). We aimed to understand the prevalence and correlates of psychosocial conditions among PLHIV entering into HIV care at the Y.R. Gaitonde Centre for AIDS Research and Education in Chennai, India. Thirteen questions were added to the standard voluntary counseling and testing questionnaire, including the Patient Health Questionnaire-9 (a depression scale) and questions assessing for CSA and IPV. We fitted logistic regression models, stratified by gender, with psychosocial condition as the outcome of interest and substance use variables and socio-demographic variables as the correlates of interest. Three hundred and eighty-three persons were enrolled into the study; of these, 253 (66%) tested positive for HIV, including 149 men and 104 women, and were included in the models. More than one-quarter (28%) of the men and 19% of the women reported at least one psychosocial condition (probable depression, CSA, or IPV). In adjusted analysis, current alcohol use was associated with greater than two times higher odds of a psychosocial condition (Adjusted Odds Ratio = 2.24, 95% CI, 1.04-4.85) among men. In conclusion, we estimated the prevalence of probable depression, CSA, and IPV among PLHIV presenting for HIV care in southern India and found that, among male PLHIV, alcohol use was associated with a markedly higher odds of reporting a psychosocial condition. Further study is needed to characterize alcohol use among male PLHIV and the possible deleterious impact of psychosocial conditions and alcohol use on HIV-related outcomes in India.
Assuntos
Sobreviventes Adultos de Maus-Tratos Infantis/estatística & dados numéricos , Consumo de Bebidas Alcoólicas/epidemiologia , Depressão/psicologia , Infecções por HIV/psicologia , Violência por Parceiro Íntimo/estatística & dados numéricos , Transtornos Mentais/epidemiologia , Adulto , Sobreviventes Adultos de Maus-Tratos Infantis/psicologia , Feminino , Humanos , Índia/epidemiologia , Violência por Parceiro Íntimo/psicologia , Masculino , Pessoa de Meia-Idade , Prevalência , Escalas de Graduação Psiquiátrica , Fatores de Risco , Inquéritos e QuestionáriosRESUMO
BACKGROUND: In India, which has the third largest HIV epidemic in the world, depression and HIV-related stigma may contribute to high rates of poor HIV-related outcomes such as loss to care and lack of virologic suppression. METHODS: We analyzed data from a large HIV treatment center in southern India to estimate the burden of depressive symptoms and internalized stigma among Indian people living with HIV (PLHIV) entering into HIV care and to test the hypothesis that probable depression was associated with internalized stigma. We fitted modified Poisson regression models, adjusted for sociodemographic variables, with probable depression (PHQ-9 score ≥10 or recent suicidal thoughts) as the outcome variable and the Internalized AIDS-Related Stigma Scale (IARSS) score as the explanatory variable. FINDINGS: 521 persons (304 men and 217 women) entering into HIV care between January 2015 and May 2016 were included in the analyses. The prevalence of probable depression was 10% and the mean IARSS score was 2.4 (out of 6), with 82% of participants endorsing at least one item on the IARSS. There was a nearly two times higher risk of probable depression for every additional point on the IARSS score (Adjusted Risk Ratio: 1.83; 95% confidence interval, 1.56-2.14). CONCLUSIONS: Depression and internalized stigma are highly correlated among PLHIV entering into HIV care in southern India and may provide targets for policymakers seeking to improve HIV-related outcomes in India.
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Depressão/epidemiologia , Infecções por HIV/psicologia , Infecções por HIV/terapia , Controle Interno-Externo , Estereotipagem , Adulto , Estudos Transversais , Feminino , Infecções por HIV/epidemiologia , Humanos , Índia/epidemiologia , Masculino , Pessoa de Meia-Idade , Inquéritos e Questionários , Resultado do TratamentoRESUMO
The current study examines sexual behaviors among HIV-infected Indians in primary care, where access to highly active antiretroviral therapy (HAART) has recently increased. Between January and April 2008, we assessed the sexual behaviors of 247 HIV-infected South Indians in care. Multivariable logistic regression models were used to determine predictors of being in a HIV-seroconcordant primary relationship, being sexually active, and reporting unprotected sex. Over three-fourths (80%) of participants were HAART-experienced. Among the 58% of participants who were currently in a seroconcordant relationship, one-third were serodiscordant when enrolling into care. Approximately two-thirds (63.2%) of participants were sexually active; 9.0% reported unprotected sex. In the multivariable analyses, participants who were in a seroconcordant primary relationship were more likely to have children, use alcohol, report unprotected sex, and have been enrolled in care for >12 months. Sexually active participants were more likely to be on HAART, have a prior tuberculosis diagnosis, test Herpes simplex type 2 antibody seropositive, and have low general health perceptions. Participants who reported unprotected sex were more likely to be in a seroconcordant relationship, be childless, want to have a child, and use alcohol. We did not document an association between HAART and unprotected sex. Among HIV-infected Indians in primary care, predictors of unprotected sex included alcohol use and desire for children. Prevention interventions for Indian couples should integrate reproductive health and alcohol use counseling at entry into care.
Assuntos
Terapia Antirretroviral de Alta Atividade , Infecções por HIV/psicologia , Parceiros Sexuais/psicologia , Sexo sem Proteção/psicologia , Adulto , Contagem de Linfócito CD4 , Feminino , Fertilidade , Infecções por HIV/tratamento farmacológico , Infecções por HIV/epidemiologia , Soronegatividade para HIV , Soropositividade para HIV/psicologia , Conhecimentos, Atitudes e Prática em Saúde , Humanos , Índia/epidemiologia , Modelos Logísticos , Masculino , Assunção de Riscos , Sexo sem Proteção/estatística & dados numéricos , Carga ViralRESUMO
In light of the increasing availability of generic highly active antiretroviral therapy (HAART) in India, further data are needed to examine variables associated with HAART nonadherence among HIV-infected Indians in clinical care. We conducted a cross-sectional analysis of 198 HIV-infected South Indian men and women between January and April 2008 receiving first-line non-nucleoside reverse transcriptase inhibitor (NNRTI)-based HAART. Nonadherence was defined as taking less than 95% of HAART doses in the last 1 month, and was examined using multivariable logistic regression models. Half of the participants reported less than 95% adherence to HAART, and 50% had been on HAART for more than 24 months. The median CD4 cell count was 435 cells per microliter. An increased odds of nonadherence was found for participants with current CD4 cell counts greater than 500 cells per microliter (adjusted odds ratio [AOR]: 2.22 [95% confidence interval {CI}: 1.04-4.75]; p = 0.038), who were on HAART for more than 24 months (AOR: 3.07 [95% CI: 1.35-7.01]; p = 0.007), who reported alcohol use (AOR: 5.68 [95%CI: 2.10-15.32]; p = 0.001), who had low general health perceptions (AOR: 3.58 [95%CI: 1.20-10.66]; p = 0.021), and who had high distress (AOR: 3.32 [95%CI: 1.19-9.26]; p = 0.022). This study documents several modifiable risk factors for nonadherence in a clinic population of HIV-infected Indians with substantial HAART experience. Further targeted culturally specific interventions are needed that address barriers to optimal adherence.
Assuntos
Terapia Antirretroviral de Alta Atividade/métodos , Infecções por HIV/tratamento farmacológico , Adesão à Medicação , Adulto , Consumo de Bebidas Alcoólicas , Fármacos Anti-HIV/uso terapêutico , Feminino , Infecções por HIV/virologia , HIV-1 , Humanos , Índia , Masculino , Valor Preditivo dos Testes , Psicologia , Inibidores da Transcriptase Reversa/uso terapêutico , Fatores de RiscoRESUMO
Ferric nitrilotriacetic acid (Fe-NTA) (9 mg Fe/kg body weight, i.p.) caused significant depletion in the detoxification and antioxidant enzyme armory with concomitant elevation in renal lipidperoxidation, serum toxicity markers viz. creatinine, blood urea nitrogen, hydrogen peroxide generation, ornithine decarboxylase activity and [3H] thymidine incorporation into renal DNA in wistar rats. However, pretreatment of animals with luteolin (10 and 20 micromol/kg body weight) for 7 consecutive days resulted in significant decrease in above parameters level. Renal glutathione content, glutathione metabolizing enzymes and antioxidant enzymes were also recovered to significant level. The enhanced reduced glutathione level and enzyme activities involved in xenobiotic metabolism and maintaining antioxidant status of cells is suggestive of a chemopreventive efficacy of luteolin against Fe-NTA mediated oxidative stress, toxicity and cell proliferation response in rats.
Assuntos
Anticarcinógenos/farmacologia , Carcinógenos/toxicidade , Neoplasias Renais/induzido quimicamente , Rim/efeitos dos fármacos , Luteolina/farmacologia , Ácido Nitrilotriacético/toxicidade , Animais , Masculino , Ácido Nitrilotriacético/química , Estresse Oxidativo , Ratos , Ratos WistarRESUMO
This case history documents four instances of HIV secondary transmission within a single family, which could have been stopped at multiple points by timely prevention. These cases of HIV secondary transmission that have occurred since the scale-up of HIV testing, prevention and clinical services in India raises the question whether the current HIV prevention infrastructure is sufficient and comprehensive in resource-limited settings.
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Infecções por HIV/prevenção & controle , Infecções por HIV/transmissão , Transmissão Vertical de Doenças Infecciosas , Adulto , Características da Família , Feminino , Infecções por HIV/tratamento farmacológico , HIV-1/efeitos dos fármacos , HIV-1/genética , Humanos , Índia , MasculinoRESUMO
Nickel, a major environmental pollutant is a known potent nephrotoxic agent. In this communication we report the chemopreventive effect of Terminalia chebula on nickel chloride (NiCl(2)) induced renal oxidative stress, toxicity and cell proliferation response in male Wistar rats. Administration of NiCl(2) (250micromoL Ni/kg body weight) to male Wistar rats resulted in an increase in the reduced renal glutathione content (GSH), glutathione-S-transferase (GST), glutathione reductase (GR), lipid peroxidation (LPO), H(2)O(2) generation, blood urea nitrogen (BUN) and serum creatinine with a concomitant decrease in the activity of glutathione peroxidase (p<0.001). Nickel chloride (NiCl(2)) treatment also induced tumor promotion markers, viz., ornithine decarboxylase (ODC) activity and thymidine [(3)H] incorporation into renal DNA (p<0.001). Prophylactic treatment of rats with T. chebula (25mg/kg body weight and 50mg/kg body weight) daily for one week resulted in the diminution of NiCl(2) mediated damage as evident from the down regulation of glutathione content, GST, GR, LPO, H(2)O(2) generation, BUN, serum creatinine, DNA synthesis (p<0.001) and ODC activity (p<0.01) with concomitant restoration of GPx activity. Thus, the present investigation suggests that T. chebula extract could be used as therapeutic agent for cancer prevention as evident from this study where it blocks or suppresses the events associated with chemical carcinogenesis.
Assuntos
Rim/efeitos dos fármacos , Neoplasias/tratamento farmacológico , Níquel/toxicidade , Fitoterapia , Terminalia , Animais , Antioxidantes/uso terapêutico , DNA/biossíntese , Interações Medicamentosas , Masculino , Estresse Oxidativo , Ratos , Ratos WistarRESUMO
Nickel, a major environmental pollutant, is known for its clastogenic, toxic, and carcinogenic potential. In this article, we report the effect of Acorus calamus on nickel chloride (NiCl2)-induced renal oxidative stress, toxicity, and cell proliferation response in male Wistar rats. NiCl2 (250 micromol/kg body weight/mL) enhanced reduced renal glutathione content (GSH), glutathione- S-transferase (GST), glutathione reductase (GR), lipid peroxidation (LPO), H2O2 generation, blood urea nitrogen (BUN), and serum creatinine with a concomitant decrease in the activity of glutathione peroxidase (GPx) (p < 0.001). NiCl2 administration also dose-dependently induced the renal ornithine decarboxylase (ODC) activity several-fold as compared to salinetreated control rats. Similarly, renal DNA synthesis, which is measured in terms of [3H] thymidine incorporation in DNA, was elevated following NiCl2 treatment. Prophylactic treatment of rats with A. calamus (100 and 200 mg/kg body weight po) daily for 1 wk resulted in the diminution of NiCl2- mediated damage, as evident from the downregulation of glutathione content, GST, GR, LPO, H2O2 generation, BUN, serum creatinine, DNA synthesis (p < 0.001), and ODC activity (p < 0.01) with concomitant restoration of GPx activity. These results clearly demonstrate the role of oxidative stress and its relation to renal disfunctioning and suggest a protective effect of A. calamus on NiCl2-induced nephrotoxicity in a rat experimental model.
Assuntos
Acorus/química , Rim/efeitos dos fármacos , Níquel/farmacologia , Estresse Oxidativo/efeitos dos fármacos , Extratos Vegetais/farmacologia , Animais , Nitrogênio da Ureia Sanguínea , Creatinina/sangue , DNA/biossíntese , Glutationa/metabolismo , Glutationa Peroxidase/metabolismo , Glutationa Redutase/metabolismo , Glutationa Transferase/metabolismo , Peróxido de Hidrogênio/sangue , Peroxidação de Lipídeos/efeitos dos fármacos , Masculino , Níquel/antagonistas & inibidores , Ornitina Descarboxilase/metabolismo , Ratos , Ratos WistarRESUMO
The present study is an effort to identify a potent chemopreventive agent against various diseases (including cancer) in which oxidative stress and cell proliferation plays an important causative role. This study was designed to investigate the effect of gallic acid against ferric nitrilotriacetic acid (Fe-NTA)-induced carcinogen/ drug metabolizing phase I and phase II enzymes, antioxidative parameters, kidney markers, tumour promotion markers and lipid peroxidation (LPO) in kidney of male Wistar rats. Fe-NTA (9 mg Fe/kg body weight, intraperitoneally) caused significant depletion in the detoxification and antioxidant enzyme armoury with concomitant elevation in renal LPO, serum creatinine, blood urea nitrogen, hydrogen peroxide generation, ornithine decarboxylase activity and [3H]thymidine incorporation into renal DNA. However, pretreatment of animals with gallic acid (10 and 20 mg/kg body weight) resulted in a significant decrease in the levels of the parameters measured (P <0.001). Renal glutathione content (P <0.001), glutathione metabolizing enzyme (P <0.001) and antioxidant enzyme levels were also recovered to a significant level (P <0.001). The enhanced reduced glutathione level and enzyme activities involved in xenobiotic metabolism and maintaining antioxidant status of cells are suggestive of a chemopreventive efficacy of gallic acid against Fe-NTA-mediated oxidative stress, toxicity and cell proliferative response in Wistar rats.
Assuntos
Anticarcinógenos/uso terapêutico , Ácido Gálico/uso terapêutico , Rim/efeitos dos fármacos , Estresse Oxidativo/efeitos dos fármacos , Análise de Variância , Animais , Carcinógenos , Quimioprevenção , DNA/metabolismo , Indução Enzimática/efeitos dos fármacos , Compostos Férricos , Glutationa/metabolismo , Glutationa Redutase/efeitos dos fármacos , Glutationa Redutase/metabolismo , Glutationa Transferase/efeitos dos fármacos , Glutationa Transferase/metabolismo , Rim/enzimologia , Nefropatias/induzido quimicamente , Nefropatias/prevenção & controle , Peroxidação de Lipídeos/efeitos dos fármacos , Masculino , Ácido Nitrilotriacético/análogos & derivados , Ornitina Descarboxilase/efeitos dos fármacos , Ornitina Descarboxilase/metabolismo , Distribuição Aleatória , Ratos , Ratos Wistar , Estatísticas não ParamétricasRESUMO
Adhatoda vasica Nees (Acanthaceae) that is used by Ayurvedic physicians possesses some established medicinal properties. Environmental and occupational exposure with cadmium affects the renal system adversely. Cadmium is an established genotoxic agent. In the present study, we evaluated the antioxidant and anticlastogenic efficacy of A. vasica against cadmium chloride (CdCl2)-induced renal oxidative stress and genotoxicity in Swiss albino mice. A single intraperitoneal dose of CdCl2 (5 mg\kg BW) resulted in significant (p<0.001) increase in chromosomal aberration and micronuclei formation. Oral administration of A. vasica at two doses (50 and 100 mg/kg BW) for seven consecutive days showed significant (p<0.001) suppression of mutagenic effects of CdCl2 in plant-pretreated groups. To study the mechanism by which A. vasica exerts its antimutagenic potential, enzymes involved in metabolism and detoxification were also estimated. Cadmium intoxication altered the antioxidant levels and enhanced MDA formation significantly (p<0.001). A. vasica showed significant (p<0.001) recovery in antioxidant status, viz., GSH content, its dependent enzymes, and catalase activity. Prophylactic pretreatment of A. vasica extract in cadmium-intoxicated mice showed marked (p<0.001) inhibition of lipid peroxidation (LPO) and xanthine oxidase (XO) activity. The present findings support that antimutagenic efficacy of A. vasica can be attributed to its restoring effects on antioxidant status and suppression of MDA level formation.
Assuntos
Antioxidantes/farmacologia , Cloreto de Cádmio/toxicidade , Aberrações Cromossômicas/efeitos dos fármacos , Justicia , Estresse Oxidativo/efeitos dos fármacos , Animais , Aberrações Cromossômicas/induzido quimicamente , Masculino , Camundongos , Extratos Vegetais/farmacologiaRESUMO
Excess iron deposition in tissues leads to organ dysfunction and impairment. In this study, the protective effects of farnesol (FL), an isoprenoid, against Fe-NTA (9 mg iron/kg body weight i.p.)-induced oxidative damage and early tumour promotion markers are evaluated. The pretreatment of iron-intoxicated rats with 1% and 2%/kg body weight oral dose of FL for 7 consecutive days significantly reversed the iron-induced increase in H2O2 content (P < 0.001), malondialdehyde formation, xanthine oxidase activity (P < 0.001), ornithine decarboxylase activity (P < 0.001) and 3[H]thymidine incorporation in renal DNA (P < 0.005) with simultaneous significant depletion in serum toxicity markers blood urea nitrogen (BUN) and creatinine (P < 0.001). Significant dose-dependent restoration was recorded in renal glutathione content, its dependent enzymes and other phase II metabolizing enzymes viz., catalase, glutathione-S-transferase and quinone reductase (P < 0.001) with prophylactic treatment of FL. Present results support that FL markedly lowers the oxidative damage and appearance of tumour markers, which precludes its development as a chemopreventive tool.
Assuntos
Antioxidantes/farmacologia , Carcinógenos/toxicidade , Farneseno Álcool/farmacologia , Compostos Férricos/toxicidade , Rim/efeitos dos fármacos , Ácido Nitrilotriacético/análogos & derivados , Animais , Biomarcadores Tumorais , Nitrogênio da Ureia Sanguínea , DNA/metabolismo , Glutationa/metabolismo , Glutationa Transferase/metabolismo , Peróxido de Hidrogênio/metabolismo , Rim/metabolismo , Peroxidação de Lipídeos/efeitos dos fármacos , Masculino , Microssomos/efeitos dos fármacos , Microssomos/metabolismo , Ácido Nitrilotriacético/toxicidade , Ornitina Descarboxilase/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Oxirredutases/metabolismo , Ratos , Ratos WistarRESUMO
Apigenin, a bioflavonoid, is abundantly present in fruits and vegetables and possesses potential chemopreventive properties against a wide variety of chronic diseases. In this study we investigated the anti-genotoxic effects of apigenin against a known genotoxicant, benzo(a)pyrene (B(a)P) (125 mg kg(-1) orally) toxicity in Swiss albino mice. B(a)P administration led to induction of cytochrome P-450 (CYP), aryl hydrocarbon hydroxylase (AHH) and DNA strand breaks (P < 0.001), which was suppressed by apigenin (2.5 and 5 mg kg(-1) orally) dose dependently (P < 0.001). B(a)P-induced depletion in the level of reduced glutathione (GSH), quinone reductase (QR) and glutathione-S-transferase (GST) was also shown to be restored by apigenin pre-treatment (P < 0.001). A simultaneous significant and dose-dependent reduction was noted in DNA strand breaks and in-vivo DNA damage (P < 0.001), which gives some insight into restoration of DNA integrity in modulator groups. These results strongly support the protective nature of apigenin against B(a)P-induced toxicity.
Assuntos
Antimutagênicos/farmacologia , Apigenina/farmacologia , Benzo(a)pireno/toxicidade , Fígado/efeitos dos fármacos , Administração Oral , Animais , Antimutagênicos/química , Apigenina/química , Hidrocarboneto de Aril Hidroxilases/metabolismo , Sistema Enzimático do Citocromo P-450/metabolismo , Dano ao DNA , Fragmentação do DNA/efeitos dos fármacos , Relação Dose-Resposta a Droga , Eletroforese em Gel de Ágar , Glutationa/metabolismo , Glutationa Transferase/metabolismo , Fígado/metabolismo , Fígado/patologia , Masculino , Camundongos , Estrutura Molecular , Testes de Mutagenicidade/métodos , NAD(P)H Desidrogenase (Quinona)/metabolismo , Estresse Oxidativo/efeitos dos fármacosRESUMO
Cadmium intoxication induces lipid peroxidation and causes oxidative damage to various tissues by altering antioxidant defence system enzymes. At 24 h after treatment with a single intraperitoneal dose of cadmium chloride (5 mg kg-1), Swiss albino mice showed a significant increase in the levels of malanodialdehyde and xanthine oxidase (P<0.001), and a concomitant depletion of renal glutathione, catalase (P<0.001) and other antioxidant enzymes. CdCl2 also led to a simultaneous increase in micronuclei formation (P<0.001) and chromosomal aberrations (P<0.05) in mouse bone marrow cells. Oral pre-treatment with Pluchea lanceolata extract at doses of 100 and 200 mg kg-1 for 7 consecutive days before CdCl2 intoxication caused a significant reduction in malanodialdehyde formation and xanthine oxidase activity (P<0.001). A significant restoration of the activity of antioxidant defence system enzymes such as catalase, glutathione peroxidase (P<0.05), glutathione-S-transferase and glutathione reductase (P<0.001) was observed. A significant dose-dependent decrease in chromosomal aberrations and micronuclei formation was also observed (P<0.05). The results indicate that pre-treatment with P. lanceolata attenuates cadmium chloride induced oxidative stress and genotoxicity by altering antioxidant enzymes and reducing chromatid breaks and micronuclei formation.