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1.
Bioinorg Chem Appl ; 2022: 2335443, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35855787

RESUMEN

The in vitro antibacterial, anticancer, and antioxidant activities of a few plant extracts were widely known for decades, and they were used for application in the conventional way. Specifically, electrospun nanofibrous mats have recently exhibited great antibacterial, anticancer, and antioxidant activities. The herbal extracts infused into these formations are expected to have a more efficient and integrated effect on in vitro biological applications. The purpose of this study is to develop polycaprolactone- (PCL-) based nanofiber mats that are infused with a traditional plant extract using Clerodendrum phlomidis leaves to improve the synthesized nanofibers' antibacterial, anticancer, and antioxidant efficacy. This study examined the morphology, thermal properties, mechanical properties, structure, and in vitro drug release studies of electrospun nanofibers. Antibacterial, anticancer, and antioxidant activities of the electrospun nanofibrous mats were also studied. The HRTEM and FESEM pictures of PCL and PCL-CPM nanofibers provide that smooth, defect-free, and homogeneous nanofibers were found to be 602.08 ± 75 nm and 414.15 ± 82 nm for PCL and PCL-CPM nanofibers, respectively. The presence of Clerodendrum phlomidis extract in the electrospun nanofibers was approved by UV-visible and FTIR spectroscopy. The incorporation of Clerodendrum phlomidis extract to nanofiber mats resulted in substantial antibacterial activity against bacterial cells. PCL-CPM mats exposed to oral cancer (HSC-3) and renal cell carcinoma (ACHN) cell lines displayed promising anticancer activity with less than 50% survival rate after 24 h of incubation. 2,2-Diphenyl-1-picrylhydrazyl (DPPH) assay performed on PCL-CPM nanofibers revealed the antioxidant scavenging activity with maximum inhibition of 34% suggesting the role of the secondary metabolites release from scaffold. As a result, the findings of this study revealed that Clerodendrum phlomidis extract encapsulating PCL electrospun nanofibers has a high potential for usage as a biobased antibacterial, anticancer, and antioxidant agent.

2.
Chemosphere ; 298: 134265, 2022 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-35283151

RESUMEN

Most of the 'oil refineries' severally pollutes the water resources by depleting their untreated waste water like cooling water, storm water and unsanitary sewage water. These wastewaters are to be treated with high care to protect the human, pebbles, plants, fish and other water animals and from harmful effects. The present study focused to treat the oil refinery wastewater by means of Multi wall carbon nanotube (MWCNT) coated Polyvinylidene Fluoride (PVDF) membrane. The main objectives are: to increases the life of filter, reduce the percolation flux and reduce the formation of antifouling in the filter by using MWCNT composite membrane in it. Different process parameters of the proposed water treatment process, like diameter of MWCNT (15 nm, 20 nm, 25 nm and 30 nm), operating pressure (3 bar, 4 bar, 5 bar and 6 bar), pH value (3, 5, 7 and 9) and temperature (25 °C, 30 °C, 35 °C and 40 °C) temperature. Taguchi statistical technique is employed for designing experiments and for optimizing the process parameters of wastewater treatment process of an oil refinery. The proposed filter for wastewater treatment exhibited appreciable performance in removal rate of Percolation flux, percentage of chemical oxygen demand removal and percentage of total carbolic rejection as 27.2 kg/m2h, 78.51% and 95.33% respectively.


Asunto(s)
Nanotubos de Carbono , Purificación del Agua , Membranas Artificiales , Industria del Petróleo y Gas , Eliminación de Residuos Líquidos/métodos , Aguas Residuales , Purificación del Agua/métodos
3.
Cleft Palate Craniofac J ; 55(3): 335-341, 2018 03.
Artículo en Inglés | MEDLINE | ID: mdl-29437498

RESUMEN

OBJECTIVE: Nonsyndromic cleft lip with or without cleft palate (NSCL±P) is a common craniofacial anomaly with multifactorial etiology. Evidence suggests that variations in WNT pathway genes contribute to an increased susceptibility to NSCL±P. The aim of this study was to investigate the association of AXIN1, APC, CTNNB1, DVL2, and GSK3ß gene variants with NSCL±P in a case-control data set from Brazil. PATIENTS: 471 individuals with NSCL±P and 504 unrelated control individuals of Caucasian ethnicity. DESIGN: Twenty single-nucleotide polymorphisms (SNPs) in/nearby AXIN1, APC, CTNNB1, DVL2, and GSK3B genes were genotyped using Taqman chemistry in a Viia7 sequence detection instrument. Genotype, allele, and haplotype frequencies were compared among NSCL±P patients and controls using Fisher exact test, implemented in PLINK software. The level of significance was established at P ≤.002 under Bonferroni correction. In silico analysis of SNP function was assessed using MirSNP database. RESULTS: Significant association was found between GSK3B rs13314595 genotypes and NSCL±P ( P = .0006). Additionally, nominal associations were found between DVL2 (rs35594616) and APC (rs448475) with NSCL±P ( P = .02 and P = .03, respectively). SNP haplotypes for GSK3B and APC genes showed nominal associations with NSCL±P ( P < .05). In silico analysis predicted that APC rs448475 harbors a binding site for the microRNA miR-617 and that the switch from a G allele to C allele enhances binding, whereas DVL2 rs35594616 did not appear to harbor microRNA-binding sites. CONCLUSION: This study shows for the first time the association between GSK3B and NSCL±P and confirms the role of additional WNT pathway genes as candidates for NSCL±P.


Asunto(s)
Labio Leporino/genética , Fisura del Paladar/genética , Glucógeno Sintasa Quinasa 3 beta/genética , Vía de Señalización Wnt/genética , Proteína de la Poliposis Adenomatosa del Colon/genética , Alelos , Proteína Axina/genética , Brasil , Estudios de Casos y Controles , Proteínas Dishevelled/genética , Femenino , Frecuencia de los Genes , Predisposición Genética a la Enfermedad , Genotipo , Haplotipos , Humanos , Masculino , Polimorfismo de Nucleótido Simple , beta Catenina/genética
4.
Indian J Chest Dis Allied Sci ; 58(2): 93-7, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-30179387

RESUMEN

Objective. Tobacco consumption continues to rise in India with about 34.6% of adult population being tobacco users. This study was done to evaluate the epidemiological profile of the tobacco users presenting to a Tobacco Cessation Centre (TCC) in Delhi. Methods. This is a retrospective observational study of subjects seen over a period of 10 years (2001-2010) at TCC of Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India. Information from a structured questionnaire filled by all tobacco users was pooled and analysed. Results. Of a total of 4493 subjects seen in the TCC, 4370 (97.3%) were males. 2704 (60.2%) subjects were smokers and remaining were users of smokeless tobacco. The highest number of subjects attending the clinic was between the age of 31 to 40 years. The mean age of starting tobacco use was 21 years. 2518 subjects started tobacco use due to "peer group pressure", while family history of tobacco use was observed in 2912 subjects. 3065 number of subjects attending the clinic were without any co-morbidity. Conclusions. Most of the subjects started tobacco use at a young age between 11 to 20 years. Peer pressure was the most common reason for initiation (56%). Most of the subjects (68.2%) had no co-morbidity. The present study observed that tobacco users probably want to quit smoking not only because of the consequences of co-morbidities but also because of the realisation of later harmful effects of continuing smoking.


Asunto(s)
Cese del Hábito de Fumar , Fumar/epidemiología , Cese del Uso de Tabaco , Adulto , Femenino , Humanos , India/epidemiología , Masculino , Estudios Retrospectivos , Nicotiana , Tabaco sin Humo
5.
Lung India ; 32(4): 422-34, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-26180408

RESUMEN

Obstructive sleep apnea (OSA) and obstructive sleep apnea syndrome (OSAS) are subsets of sleep-disordered breathing. Awareness about OSA and its consequences among the general public as well as the majority of primary care physicians across India is poor. This necessitated the development of the Indian initiative on obstructive sleep apnea (INOSA) guidelines under the auspices of Department of Health Research, Ministry of Health and Family Welfare, Government of India. OSA is the occurrence of an average five or more episodes of obstructive respiratory events per hour of sleep with either sleep-related symptoms or co-morbidities or ≥15 such episodes without any sleep-related symptoms or co-morbidities. OSAS is defined as OSA associated with daytime symptoms, most often excessive sleepiness. Patients undergoing routine health check-up with snoring, daytime sleepiness, obesity, hypertension, motor vehicular accidents, and high-risk cases should undergo a comprehensive sleep evaluation. Medical examiners evaluating drivers, air pilots, railway drivers, and heavy machinery workers should be educated about OSA and should comprehensively evaluate applicants for OSA. Those suspected to have OSA on comprehensive sleep evaluation should be referred for a sleep study. Supervised overnight polysomnography is the "gold standard" for evaluation of OSA. Positive airway pressure (PAP) therapy is the mainstay of treatment of OSA. Oral appliances (OA) are indicated for use in patients with mild to moderate OSA who prefer OA to PAP, or who do not respond to PAP or who fail treatment attempts with PAP or behavioral measures. Surgical treatment is recommended in patients who have failed or are intolerant to PAP therapy.

6.
Indian J Med Res ; 140(3): 451-68, 2014 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-25366217

RESUMEN

Obstructive sleep apnoea (OSA) and obstructive sleep apnoea syndrome (OSAS) are subsets of sleep-disordered breathing. Awareness about OSA and its consequences amongst the general public as well as the majority of primary care physcians across India is poor. This necessiated the development of the INdian initiative on Obstructive sleep apnoea (INOSA) guidelines under the auspices of Department of Health Research, Ministry of Health & Family Welfare, Government of India. OSA is the occurrence of an average five or more episodes of obstructive respiratory events per hour of sleep with either sleep related symptoms or co-morbidities or ≥ 15 such episodes without any sleep related symptoms or co-morbidities. OSAS is defined as OSA associated with daytime symptoms, most often excessive sleepiness. Patients undergoing routine health check-up with snoring, daytime sleepiness, obesity, hypertension, motor vehicular accidents and high risk cases should undergo a comprehensive sleep evaluation. Medical examiners evaluating drivers, air pilots, railway drivers and heavy machinery workers should be educated about OSA and should comprehensively evaluate applicants for OSA. Those suspected to have OSA on comprehensive sleep evaluation should be referred for a sleep study. Supervised overnight polysomnography (PSG) is the "gold standard" for evaluation of OSA. Positive airway pressure (PAP) therapy is the mainstay of treatment of OSA. Oral appliances are indicated for use in patients with mild to moderate OSA who prefer oral appliances to PAP, or who do not respond to PAP or who fail treatment attempts with PAP or behavioural measures. Surgical treatment is recommended in patients who have failed or are intolerant to PAP therapy.


Asunto(s)
Cirugía Bariátrica , Apnea Obstructiva del Sueño/cirugía , Guías como Asunto , Humanos , India , Polisomnografía , Apnea Obstructiva del Sueño/diagnóstico por imagen , Apnea Obstructiva del Sueño/fisiopatología , Ronquido/fisiopatología , Ronquido/cirugía , Ultrasonografía
7.
Thromb Haemost ; 112(6): 1110-9, 2014 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-25354936

RESUMEN

Despite optimal therapy, the morbidity and mortality of patients presenting with an acute myocardial infarction (MI) remain significant, and the initial mechanistic trigger of myocardial "ischaemia/reperfusion (I/R) injury" remains greatly unexplained. Here we show that factors released from the damaged cardiac tissue itself, in particular extracellular RNA (eRNA) and tumour-necrosis-factor α (TNF-α), may dictate I/R injury. In an experimental in vivo mouse model of myocardial I/R as well as in the isolated I/R Langendorff-perfused rat heart, cardiomyocyte death was induced by eRNA and TNF-α. Moreover, TNF-α promoted further eRNA release especially under hypoxia, feeding a vicious cell damaging cycle during I/R with the massive production of oxygen radicals, mitochondrial obstruction, decrease in antioxidant enzymes and decline of cardiomyocyte functions. The administration of RNase1 significantly decreased myocardial infarction in both experimental models. This regimen allowed the reduction in cytokine release, normalisation of antioxidant enzymes as well as preservation of cardiac tissue. Thus, RNase1 administration provides a novel therapeutic regimen to interfere with the adverse eRNA-TNF-α interplay and significantly reduces or prevents the pathological outcome of ischaemic heart disease.


Asunto(s)
Comunicación Autocrina/efectos de los fármacos , Infarto del Miocardio/prevención & control , Daño por Reperfusión Miocárdica/prevención & control , Miocardio/enzimología , Miocitos Cardíacos/efectos de los fármacos , ARN/metabolismo , Ribonucleasas/farmacología , Factor de Necrosis Tumoral alfa/metabolismo , Animales , Antioxidantes/metabolismo , Hipoxia de la Célula , Citoprotección , Modelos Animales de Enfermedad , Ratones , Mitocondrias Cardíacas/efectos de los fármacos , Mitocondrias Cardíacas/enzimología , Mitocondrias Cardíacas/patología , Infarto del Miocardio/enzimología , Infarto del Miocardio/genética , Infarto del Miocardio/inmunología , Infarto del Miocardio/patología , Daño por Reperfusión Miocárdica/enzimología , Daño por Reperfusión Miocárdica/genética , Daño por Reperfusión Miocárdica/inmunología , Daño por Reperfusión Miocárdica/patología , Miocardio/inmunología , Miocardio/patología , Miocitos Cardíacos/enzimología , Miocitos Cardíacos/inmunología , Miocitos Cardíacos/patología , ARN/genética , Ratas , Especies Reactivas de Oxígeno/metabolismo , Transducción de Señal/efectos de los fármacos , Factores de Tiempo , Factor de Necrosis Tumoral alfa/inmunología
8.
Indian J Med Res ; 137(2): 251-69, 2013 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-23563369

RESUMEN

The global prevalence of physiologically defined chronic obstructive pulmonary disease (COPD) in adults aged >40 yr is approximately 9-10 per cent. Recently, the Indian Study on Epidemiology of Asthma, Respiratory Symptoms and Chronic Bronchitis in Adults had shown that the overall prevalence of chronic bronchitis in adults >35 yr is 3.49 per cent. The development of COPD is multifactorial and the risk factors of COPD include genetic and environmental factors. Pathological changes in COPD are observed in central airways, small airways and alveolar space. The proposed pathogenesis of COPD includes proteinase-antiproteinase hypothesis, immunological mechanisms, oxidant-antioxidant balance, systemic inflammation, apoptosis and ineffective repair. Airflow limitation in COPD is defined as a postbronchodilator FEV1 (forced expiratory volume in 1 sec) to FVC (forced vital capacity) ratio <0.70. COPD is characterized by an accelerated decline in FEV1. Co morbidities associated with COPD are cardiovascular disorders (coronary artery disease and chronic heart failure), hypertension, metabolic diseases (diabetes mellitus, metabolic syndrome and obesity), bone disease (osteoporosis and osteopenia), stroke, lung cancer, cachexia, skeletal muscle weakness, anaemia, depression and cognitive decline. The assessment of COPD is required to determine the severity of the disease, its impact on the health status and the risk of future events (e.g., exacerbations, hospital admissions or death) and this is essential to guide therapy. COPD is treated with inhaled bronchodilators, inhaled corticosteroids, oral theophylline and oral phosphodiesterase-4 inhibitor. Non pharmacological treatment of COPD includes smoking cessation, pulmonary rehabilitation and nutritional support. Lung volume reduction surgery and lung transplantation are advised in selected severe patients. Global strategy for the diagnosis, management and prevention of Chronic Obstructive Pulmonary Disease guidelines recommend influenza and pneumococcal vaccinations.


Asunto(s)
Contaminación del Aire , Broncodilatadores/administración & dosificación , Enfermedad Pulmonar Obstructiva Crónica/tratamiento farmacológico , Enfermedad Pulmonar Obstructiva Crónica/fisiopatología , Asma/complicaciones , Asma/epidemiología , Comorbilidad , Humanos , India/epidemiología , Enfermedad Pulmonar Obstructiva Crónica/epidemiología , Enfermedad Pulmonar Obstructiva Crónica/etiología , Factores de Riesgo
10.
Indian J Chest Dis Allied Sci ; 54(1): 9-17, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-22779117

RESUMEN

BACKGROUND: Transbronchial lung biopsy (TBLB) is commonly performed for confirming the tissue diagnosis of diffuse parenchymal lung diseases (DPLDs). There is an urgent need to establish guidelines for interpretation of TBLB in order to improve its diagnostic utility. METHODS: We retrospectively studied 916 consecutive patients (494 males; mean age 49 years) who underwent TBLB over a 5-year period (July 2005 to July 2010) at Vallabhbhai Patel Chest Institute. RESULTS: In 615 (67.1%) procedures, material obtained during TBLB was adequate for histopathology interpretation. Pathological features evaluated in each case were: alveolar architecture, inflammatory infiltrate, interstitial fibrosis, atypical cells, pigment deposition, honey-comb change and fibroblast foci. The cases were categorised on the basis of histopathology into six patterns: (1) adequate biopsy without a specific diagnostic abnormality (n = 137, 22.3%); (2) acute pneumonitis (n = 29, 4.7%); (3) neoplasia (n = 109, 17.7%); (4) chronic interstitial inflammation with or without fibrosis (n = 138, 22.4%); (5) granulomatous inflammation, (n = 186, 30.2%); and (6) other specific causes (n = 16, 2.6%). Definitive diagnosis could be made after correlation of TBLB histopathology with clinical and radiological features in 55.3% cases. CONCLUSIONS: TBLB appears to be an important diagnostic tool for the diagnosis of DPLDs. The use of a pattern-based approach to TBLB adds to its diagnostic yield and can be helpful in cases where open lung biopsy is not available.


Asunto(s)
Enfermedades Pulmonares/patología , Pulmón/patología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Biopsia , Broncoscopía , Femenino , Humanos , Masculino , Persona de Mediana Edad , Adulto Joven
11.
Indian J Chest Dis Allied Sci ; 53(4): 215-9, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-22128620

RESUMEN

BACKGROUND: Environmental tobacco smoke (ETS) exposure is a health hazard for non-smokers. OBJECTIVE: To measure breath carbon monoxide (CO) levels of non-smoking subjects exposed to ETS and of non-smoking subjects not exposed to ETS. RESULTS: The study was conducted with the help of a pre-designed questionnaire. One hundred male subjects were selected for the study; group I consisted of 50 non-smokers (waiters in hotels/restaurants/bars) exposed to ETS and group II consisted of 50 non-smokers not exposed to ETS. All subjects underwent clinical examination. Breath CO levels of both the groups were measured by the Mini Smoklyzer. The mean breath CO level (ppm) was higher in group I compared to group II (9.18 +/- 2.84 versus 4.56 +/- 1.62; p < 0.001). The mean breath CO level was also significantly higher in ETS exposed subjects who worked for more than nine hours a day in bars, restaurants and hotels (p = 0.018) and in subjects suffering from respiratory diseases (p < 0.001) compared to normal subjects. CONCLUSION: The abnormally high level of breath CO observed in passive smokers exposed to ETS may suggest that, these subjects may be prone to develop the tobacco related diseases.


Asunto(s)
Pruebas Respiratorias , Monóxido de Carbono/análisis , Contaminación por Humo de Tabaco/efectos adversos , Adulto , Exposición a Riesgos Ambientales , Humanos , India , Masculino , Persona de Mediana Edad , Población Urbana/estadística & datos numéricos , Adulto Joven
12.
J Med Phys ; 35(3): 137-43, 2010 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-20927220

RESUMEN

The comparative dosimetry of GammaMed (GM) Plus high-dose rate brachytherapy source was performed by an experiment using 0.1-cc thimble ionization chamber and simulation-based study using EGSnrc code. In-water dose measurements were performed with 0.1-cc chamber to derive the radial dose function (r = 0.8 to 20.0 cm) and anisotropy function (r = 5.0 cm with polar angle from 10° to 170°). The nonuniformity correction factor for 0.1-cc chamber was applied for in-water measurements at shorter distances from the source. The EGSnrc code was used to derive the dose rate constant (Λ), radial dose function g(L)(r) and anisotropy function F(r, θ) of GM Plus source. The dosimetric data derived using EGSnrc code in our study were in very good agreement relative to published data for GM Plus source. The radial dose function up to 12 cm derived from measured dose using 0.1-cc chamber was in agreement within ±3% of data derived by the simulation study.

13.
Indian J Chest Dis Allied Sci ; 52(1): 19-24, 2010.
Artículo en Inglés | MEDLINE | ID: mdl-20364610

RESUMEN

OBJECTIVE: To measure and compare the breath carbon monoxide (CO) levels in cigarette and bidi smokers in India. METHODS: Breath CO was measured in 389 smokers (241 cigarette smokers,148 bidi smokers) using portable breath CO analyser (Bedfont-England, Smokelyzer). Tobacco contents and length of single stick of different brands of cigarette and bidi were also measured. RESULTS: Their mean age was 38.7 +/- 13.4 years. The average duration of smoking was 18.2 +/- 13.0 years. Average breath CO levels were 15.6 +/- 7.0 ppm in smokers and 4.07 +/- 1.16 ppm in non-smokers. Average breath CO level was significantly higher in bidi smokers (18.9 +/- 7.7 ppm) compared to cigarette smokers (13.6 +/- 5.8 ppm) when total consumption of cigarette/bidi was more than five pack-years (p = 0.002). Average tobacco weight of bidi (216.8 mg) was significantly less than cigarette (696 mg). CONCLUSIONS: Bidi is equally or more harmful than cigarette smoking. One bidi may be considered to one cigarette for calculating "pack-years" of smoking.


Asunto(s)
Pruebas Respiratorias , Monóxido de Carbono/análisis , Fumar , Adolescente , Adulto , Anciano , Humanos , India , Masculino , Persona de Mediana Edad , Adulto Joven
14.
Surgeon ; 7(5): 276-81, 2009 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-19848060

RESUMEN

OBJECTIVES: The TWR system was introduced in July 2000. The purpose of this study was to investigate whether patients below the age of 50 years with colorectal cancer (CRC) are experiencing delays in treatment. METHODS: The CRC database was searched for all newly diagnosed colorectal cancers between January 2001 and December 2005 in patients who were aged less than 50 years. RESULTS: There were 911 patients with CRC during the study period. Of these, 41 patients (4.5%) were aged under 50. Thirty-eight case notes were retrieved and reviewed; the median age was 47 years. Fourteen (37%) presented as an emergency, 9 (24%) via the TWR, 8 (21%) were non-TWR referrals to outpatients and the remainder were referred via miscellaneous routes. The median time from referral to initial consultation was 11 days (range 8-14 days) in the TWR group, 24 days (range 14-135 days) in the surgical outpatients group and 44 days (range 11-93 days) in the miscellaneous (direct endoscopy, in-hospital physician's referral) group. The median time from referral to initiation of treatment was 51 days (range 15-116 days) in the TWR group, 103 days (range 43-174 days) in the outpatient group and 96 days (range 27-270 days) in the miscellaneous group. Excluding age as a factor, 73% of the non-TWR referrals met the TWR criteria. CONCLUSION: Patients with symptoms of CRC below the age of 50 years may face referral and diagnostic delay if not referred via the TWR system; many of these would be eligible if age was not a deciding factor.


Asunto(s)
Neoplasias Colorrectales/cirugía , Derivación y Consulta/normas , Listas de Espera , Adulto , Factores de Edad , Neoplasias Colorrectales/diagnóstico , Neoplasias Colorrectales/epidemiología , Neoplasias Colorrectales/patología , Diagnóstico Precoz , Inglaterra/epidemiología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Medicina Estatal , Factores de Tiempo
15.
Indian J Chest Dis Allied Sci ; 51(1): 21-5, 2009.
Artículo en Inglés | MEDLINE | ID: mdl-19317359

RESUMEN

BACKGROUND: Fine needle aspiration biopsy [FNAB] is used extensively in the clinical work-up of radiologically detected lung lesions. However, categorisation of lung cancer by computed tomography guided FNAB alone is limited by overlapping morphological features. AIM: To examine further the utility of immunohistochemical panel of antibodies to thyroid transcription factor [TTF-1], synaptophysin, chromogranin A [CgA], cytokeratin-pan, cytokeratin-7 [CK-7], cytokeratin-20 [CK-20], leucocyte common antigen [LCA], and carcinoembryonic antigen [CEA] in cytologic cell block samples in the differential diagnosis of lung cancer. METHODS: Twenty-nine FNABs of newly diagnosed cases of lung cancer were studied. Immunohistochemistry was done on paraffin embedded cell block sections using Dako monoclonal antibodies. RESULTS: Morphological diagnosis of non-small cell carcinoma (NSCLC) was made in 22/29 [76%] and small cell carcinoma in 7/29 (24%) cases. Five of the seven (71.4%) cases of small cell carcinoma were CgA+/TTF-1+, 14.3% [1/7] were CgA+/ synaptophysin+/TTF-1-negative. In one case, LCA positivity lead to the diagnosis of non-Hodgkins lymphoma. The NSCLC was categorised further into well differentiated 11/22 [50%], moderately differentiated 7/22 [31.8%] and poorly differentiated 4/22 [18.2%] cases. Cytokeratin-pan positivity in squamous cell carcinomas [n=15] was seen to be related to cellular differentiation. All the three cases of adenocarcinoma were CK-7+/CK-20 negative. In one case with large cell carcinoma, CgA-positivity lead to recategorisation as large cell neuroendocrine carcinoma. CONCLUSIONS: Our results suggest that the proposed panel of immunohistochemical markers might help further classification of lung carcinomas even in small FNAB material and permit more consistent patient enrollment for trials with targeted treatments.


Asunto(s)
Neoplasias Pulmonares/patología , Anciano , Anciano de 80 o más Años , Biopsia con Aguja Fina , Diagnóstico Diferencial , Femenino , Humanos , Inmunohistoquímica , Pulmón/patología , Masculino , Persona de Mediana Edad
16.
Parasitol Res ; 104(6): 1289-93, 2009 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-19148681

RESUMEN

There is a growing interest in the use of botanical insecticides to reduce the use of synthetic pesticides in order to avoid environmental side effects. Anopheles stephensi is the primary vector of urban malaria, an endemic disease in India. So, an effort to assay An. stephensi larvae with gall extracts of Quercus infectoria was made under laboratory conditions at Mysore. Ethyl-acetate extract was found to be the most effective of all the five extracts tested for larvicidal activity against the fourth instar larvae, with LC(50) of 116.92 ppm followed by gallotannin, n-butanol, acetone, and methanol with LC(50) values of 124.62, 174.76, 299.26, and 364.61 ppm, respectively. The efficacy in killing mosquito larvae may make this plant promising for the development of new botanical larvicide.


Asunto(s)
Anopheles/efectos de los fármacos , Insecticidas/farmacología , Extractos Vegetales/farmacología , Tumores de Planta , Quercus/química , Animales , Femenino , India , Insecticidas/aislamiento & purificación , Larva/efectos de los fármacos , Dosificación Letal Mediana , Extractos Vegetales/aislamiento & purificación , Análisis de Supervivencia
17.
Indian J Chest Dis Allied Sci ; 51(4): 217-24, 2009.
Artículo en Inglés | MEDLINE | ID: mdl-20073373

RESUMEN

RATIONALE: Even though oxidative stress has been proposed as an underlying mechanism for the symptoms in patients with obstructive sleep apnoea syndrome (OSAS), little information is available on the effects of anti-oxidant treatment on their improvement. OBJECTIVES: To observe the effects of anti-oxidant treatment on polysomnographic parameters and oxidative stress markers in OSAS patients. METHODS: Polysomnography (PSG) was performed on 20 male patients. They were administered continuous positive airway pressure (CPAP) therapy for two nights followed by oral intake of vitamin C (100 mg BD) [DOSAGE ERROR CORRECTED] and vitamin E (400 IU BD) for 45 days and a repeat PSG was done. Ten healthy normal subjects underwent the same protocol excepting the CPAP therapy. RESULTS: In OSAS patients, plasma lipid peroxidation increased significantly and whole blood reduced glutathione decreased significantly. The CPAP therapy as well as anti-oxidant treatment reduced the lipid peroxidation and restored the reduced glutathione concentrations. After anti-oxidant intake, OSAS patients slept better with decrease in Epworth sleepiness score and the number of apnoeic episodes. They spent more time in stages 3 and 4 of sleep. The optimum pressure of CPAP device was significantly lowered also. CONCLUSIONS: Oxidative stress contributes to sleep behaviour in OSAS patients, and anti-oxidant intake improves the quality of sleep in them.


Asunto(s)
Estrés Oxidativo/fisiología , Apnea Obstructiva del Sueño/sangre , Adulto , Antioxidantes/uso terapéutico , Presión de las Vías Aéreas Positiva Contínua/métodos , Estudios de Seguimiento , Glutatión/sangre , Humanos , Peroxidación de Lípido , Masculino , Polisomnografía , Pronóstico , Sueño/fisiología , Apnea Obstructiva del Sueño/fisiopatología , Apnea Obstructiva del Sueño/terapia
19.
Cell Mol Biol (Noisy-le-grand) ; 53(5): 42-52, 2007 May 30.
Artículo en Inglés | MEDLINE | ID: mdl-17543232

RESUMEN

Free radicals play a crucial role in health and disease and both reactive oxygen species (ROS) and reactive nitrogen species (RNS) have been implicated in CNS effects like excitotoxicity. Theophylline, a re-emerging drug for the treatment of obstructive airway disease, has a narrow therapeutic index which precludes its safe use. The present study evaluated the possible involvement of free radicals in theophylline induced seizures in mice. Aminophylline (100-250 mg/kg) consistently induced seizures and post-ictal mortality, and conventional anticonvulsants and adenosine agonists were ineffective in antagonizing them. Further, phosphodiesterase inhibitors, per se, also did not show any significant seizurogenic potential. Pretreatments with antioxidants, ascorbic acid, alpha-tocopherol and melatonin, all dose dependently reduced seizure incidence and mortality after aminophylline, whereas, antioxidant depletion potentiated such excitotoxicity. Pretreatments with the NO synthase inhibitors, L-NAME and 7-NI blocked aminophylline seizures, whereas, the NO mimetics, L-arginine and glyceryl trinitrate, tended to potentiate this phenomenon. Sub-effective doses of aminophylline (100 mg/kg) also induced seizures when combined with subthreshold intensity of electroshock, and such seizures were similarly antagonized by the antioxidants and NO synthase inhibitors. Biochemical assay of brain homogenates showed that aminophylline seizures were associated with enhancements in brain MDA and NOx (NO metabolites) levels, whereas, SOD activity was reduced, and these changes were attenuated after melatonin and L-NAME pretreatments. The pharmacological and biochemical data are strongly suggestive of the involvement of both ROS and RNS during theophylline-induced seizures.


Asunto(s)
Radicales Libres/metabolismo , Enfermedades del Sistema Nervioso/metabolismo , Convulsiones/metabolismo , Teofilina/toxicidad , Aminofilina/toxicidad , Animales , Antioxidantes/farmacología , Arginina/farmacología , Ácido Ascórbico/farmacología , Relación Dosis-Respuesta a Droga , Femenino , Masculino , Melatonina/farmacología , Ratones , NG-Nitroarginina Metil Éster/farmacología , Enfermedades del Sistema Nervioso/inducido químicamente , Enfermedades del Sistema Nervioso/prevención & control , Nitroglicerina/farmacología , Inhibidores de Fosfodiesterasa/farmacología , Especies de Nitrógeno Reactivo/metabolismo , Especies Reactivas de Oxígeno/metabolismo , Convulsiones/inducido químicamente , Convulsiones/prevención & control , Superóxido Dismutasa/metabolismo , alfa-Tocoferol/farmacología
20.
Indian J Chest Dis Allied Sci ; 48(4): 271-3, 2006.
Artículo en Inglés | MEDLINE | ID: mdl-16970294

RESUMEN

A 26-year-old male patient who presented with symptoms of end stage cardiac failure as a result of dilated cardiomyopathy, had an orthotopic cardiac transplantation. A comprehensive cardiac rehabilitation programme was provided to him and he was introduced to a sport (tennis). The exercise training programme progressed from low intensity training to high intensity programme over a period of 15 months. A cardio-pulmonary exercise test done 22 months after surgery suggested that he was able to achieve the aerobic capacity comparable to that of a normal South Indian subject. He participated successfully in the World Transplant Games in Sydney and returned safely. This suggests that after a proper cardiac rehabilitation programme, patients undergoing heart transplantation can achieve normal physiological responses to lead a normal active life.


Asunto(s)
Terapia por Ejercicio/métodos , Trasplante de Corazón/rehabilitación , Adulto , Cardiomiopatía Dilatada/cirugía , Insuficiencia Cardíaca/cirugía , Humanos , Masculino
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