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Bhaumik S, Paleu V, Chowdhury D, Batham A, Sehgal U, Bhattacharya B, Ghosh C, Datta S. Tribological Investigation of Textured Surfaces in Starved Lubrication Conditions. Materials (Basel) 2022; 15:8445. [PMID: 36499941 PMCID: PMC9738694 DOI: 10.3390/ma15238445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/18/2022] [Accepted: 11/24/2022] [Indexed: 06/17/2023]
Abstract
The present work investigates the friction reduction capability of two types of micro-textures (grooves and dimples) created on steel surfaces using a vertical milling machine. The wear studies were conducted using a pin-on-disc tribometer, with the results indicating a better friction reduction capacity in the case of the dimple texture as compared to the grooved texture. The microscopic images of the pin surface revealed deep furrows and significant damage on the pin surfaces of the groove-textured disc. An optimization of the textured surfaces was performed using an artificial neural network (ANN) model, predicting the influence of the surface texture as a function of the load, depth of cut and distance between the micro-textures.
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Affiliation(s)
- Shubrajit Bhaumik
- Tribology and Interactive Surface Research Laboratory (TRISUL), Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Chennai 601103, India
| | - Viorel Paleu
- Mechanical Engineering, Mechatronics and Robotics Department, Mechanical Engineering Faculty, “Gheorghe Asachi” Technical University of Iași, 63 D. Mangeron Blvd., 700050 Iași, Romania
| | - Dhrubajyoti Chowdhury
- Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, India
| | - Adarsh Batham
- Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, India
| | - Udit Sehgal
- Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, India
| | - Basudev Bhattacharya
- Research and Development and Scientific Services, Tata Steel Limited, Jamshedpur 831001, India
| | - Chiradeep Ghosh
- Research and Development and Scientific Services, Tata Steel Limited, Jamshedpur 831001, India
| | - Shubhabrata Datta
- Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, India
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Gupta S, Singh PK, Bhattacharya B. Change in charge carrier dynamics by incorporating ionic liquid into poly ethylene oxide–based sodium acetate polymer electrolytes. HIGH PERFORM POLYM 2022. [DOI: 10.1177/09540083221088737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Poly (ethylene oxide) based sodium ion conducting solid polymer electrolytes films (salt NaCH3COO) with varying amounts of an ionic liquid, 1-ethyl 3-methylimidazolium thiocyante were prepared by solution-cast method. All the prepared samples were characterized in detail for their ion transport characteristics at room temperature and temperature dependent behavior as well using electrochemical impedance spectroscopy. The measurement of ionic conductivity shows the many fold enhancement due the incorporation of ionic liquid in the polymer electrolyte matrix. The charge carrier density and mobility of charge carriers has been calculated and used for explaining the conductivity variations in these films. The increase in conductivity has been explained in terms of plasticization effect of ionic liquid and number of charge carriers per unit volume of electrolyte.
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Affiliation(s)
- Sandhya Gupta
- Centre of Excellence, Solar Cells and Renewable Energy, School of Basic Sciences and Research, Sharda University, Greater Noida, India
| | - Pramod K Singh
- Centre of Excellence, Solar Cells and Renewable Energy, School of Basic Sciences and Research, Sharda University, Greater Noida, India
| | - B Bhattacharya
- Department of Physics, MMV, Banaras Hindu University, Varanasi, India
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Datta A, Gupta P, Bhattacharya B, Das A, Chatterjee S, Banerjee A. Evidence of sexual transfer of mycobacteria from male to female partners reporting to an IVF clinic. Trop Doct 2022; 52:331-334. [PMID: 35196202 DOI: 10.1177/00494755221074754] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Female genital tuberculosis (GTB) contributes significantly to infertility in low- and middle-income countries. Dissemination of infection from pulmonary and extrapulmonary sites is the major reason for causation of GTB. Additionally, sexual transmission of GTB from male partners has been reported. We selected 81 couples desiring babies from an in vitro fertilization clinic. We used multiplex-PCR for mycobacterial detection in semen of males, in the endometrium of their female counterparts and in the products of conception (POC) from miscarriage. Data interpretation shows that these pregnancies failed owing to sexual transmission of mycobacteria. We noticed by multiplex PCR that mycobacterial infestation in the female can take place in either endometrium or POC from asymptomatic males harbouring mycobacteria in their semen. Therefore, we propose sexual transfer of mycobacteria to be a probable cause of miscarriage. Thus, we suggest multiplex PCR based screening of semen for all males of the couples attempting successful childbirth.
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Affiliation(s)
- Abira Datta
- Central Research Laboratory, PGIMSR and ESI hospital, Kankurgachhi, Kolkata, West Bengal, India.,Reproductive Medicine Unit, Calcutta Fertility Mission, Kolkata, West Bengal, India
| | - Prabuddha Gupta
- Amity Institute of Biotechnology Kolkata, 530170Amity University Kolkata, Major Arterial Road (South-East), Action Area II, Newtown, Kolkata, West Bengal, India
| | - Basudev Bhattacharya
- Reproductive Medicine Unit, Calcutta Fertility Mission, Kolkata, West Bengal, India
| | - Arabinda Das
- Department of Statistics, 271538Acharya Prafulla Chandra College, West Bengal, India
| | | | - Asesh Banerjee
- Amity Institute of Biotechnology Kolkata, 530170Amity University Kolkata, Major Arterial Road (South-East), Action Area II, Newtown, Kolkata, West Bengal, India
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Goswami S, Choudhuri S, Bhattacharya B, Bhattacharjee R, Roy A, Mukhopadhyay S, Ghosh S, Chowdhury S. Chronic inflammation in polycystic ovary syndrome: A case-control study using multiple markers. Int J Reprod Biomed 2021; 19:313-320. [PMID: 33997590 PMCID: PMC8106819 DOI: 10.18502/ijrm.v19i4.9057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 07/27/2020] [Accepted: 09/21/2020] [Indexed: 11/24/2022] Open
Abstract
Background Polycystic ovary syndrome (PCOS) is associated with insulin resistance and elevated risk of cardiovascular disease and diabetes. Chronic inflammation has been observed in PCOS in several studies but there is also opposing evidence and a dearth of research in Indians. Objective To estimate chronic inflammation in PCOS and find its relationship with appropriate anthropometric and biochemical parameters. Materials and Methods Chronic inflammation was assessed in 30 women with PCOS (Group A) and 30 healthy controls (Group B) with highly sensitive C-reactive protein (hsCRP), interleukin-6 (IL-6), tumour necrosis factor alpha (TNFα), and platelet microparticles (PMP). In group A, the relationship of chronic inflammation with insulin resistance, waist hip ratio (WHR) serum testosterone, and serum glutamate pyruvate transaminase (SGPT) were examined. Results In group A, the hsCRP, TNFα, and PMP were significantly elevated compared to group B. However, IL-6 level was similar between the groups. In group A, PMP showed a significant positive correlation with waist-hip ratio and serum testosterone. IL-6 showed a significant positive correlation with insulin sensitivity and significant negative correlation with insulin resistance and serum glutamate pyruvate transaminase. Conclusion PCOS is associated with chronic inflammation and PMP correlates positively with central adiposity and biochemical hyperandrogenism in women with PCOS.
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Affiliation(s)
- Soumik Goswami
- Department of Endocrinology and Metabolism, Institute of Post Graduate Medical Education & Research and Seth Sukhlal Karnani Memorial Hospital, Kolkata, West Bengal, India
| | - Subhadip Choudhuri
- Department of Biochemistry, Institute of Postgraduate Medical Education & Research and Seth Sukhlal Karnani Memorial Hospital, Kolkata, West Bengal, India
| | - Basudev Bhattacharya
- Department of Biochemistry, Institute of Postgraduate Medical Education & Research and Seth Sukhlal Karnani Memorial Hospital, Kolkata, West Bengal, India
| | - Rana Bhattacharjee
- Department of Endocrinology and Metabolism, Institute of Post Graduate Medical Education & Research and Seth Sukhlal Karnani Memorial Hospital, Kolkata, West Bengal, India
| | - Ajitesh Roy
- Department of Endocrinology and Metabolism, Institute of Post Graduate Medical Education & Research and Seth Sukhlal Karnani Memorial Hospital, Kolkata, West Bengal, India
| | - Satinath Mukhopadhyay
- Department of Endocrinology and Metabolism, Institute of Post Graduate Medical Education & Research and Seth Sukhlal Karnani Memorial Hospital, Kolkata, West Bengal, India
| | - Sujoy Ghosh
- Department of Endocrinology and Metabolism, Institute of Post Graduate Medical Education & Research and Seth Sukhlal Karnani Memorial Hospital, Kolkata, West Bengal, India
| | - Subhankar Chowdhury
- Department of Endocrinology and Metabolism, Institute of Post Graduate Medical Education & Research and Seth Sukhlal Karnani Memorial Hospital, Kolkata, West Bengal, India
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Pramanik S, Chowdhury S, Ganguly U, Banerjee A, Bhattacharya B, Mondal LK. Visual contrast sensitivity could be an early marker of diabetic retinopathy. Heliyon 2020; 6:e05336. [PMID: 33145449 PMCID: PMC7591734 DOI: 10.1016/j.heliyon.2020.e05336] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 07/11/2020] [Accepted: 10/21/2020] [Indexed: 12/28/2022] Open
Abstract
The present study aimed to explore the early predictive marker of diabetic retinopathy (DR) and to elucidate the associated demographic, metabolic, and ocular factors. We enrolled 43 type 2 diabetic subjects with mild non-proliferative retinopathy (MNPDR), 30 diabetic subjects with no retinopathy (DNR), and 35 healthy controls (HC). The study groups showed no significant alteration in central macular thickness (CMT) and visual acuity (VA). The contrast sensitivity (CS) score was found to be significantly lower among DNR and MNPDR subjects compared to HCs (p < 0.0001). Between MNPDR and DNR subjects, the CS score was significantly lower in the former (p = 0.0036). CS score discriminated DNR subjects from HC, with 74% accuracy for the optimal threshold 0.71. The associated area under the ROC curve (AUC) is 0.82 (p < 0.0001) while the discrimination rule has 66% sensitivity and 80% specificity. The CS score also discriminated MNPDR subjects from DNR with 64% accuracy for the optimal threshold 0.53. The associated AUC is 0.65 (p < 0.023) and the rule has 86% sensitivity and 33% specificity. According to best subset regression analysis, not only glycaemic parameters but also lipid parameters [low-density lipoprotein cholesterol (LDL-C) (p = 0.045) and triglycerides (TG) (p = 0.0005)] were found to be significant predictors of CS. CMT (p = 0.058) was another marginally significant predictor of CS. CS may be used as an early predictive marker for DR. So, not only hyperglycemia, but also hyperlipidemia seems to significantly affect retinal CS function in diabetes.
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Affiliation(s)
- Subhasish Pramanik
- Institute of Post Graduate Medical Education and Research (IPGMER), 244 Acharya Jagadish Chandra Bose Road, Kolkata, 700020, India
| | - Subhankar Chowdhury
- Institute of Post Graduate Medical Education and Research (IPGMER), 244 Acharya Jagadish Chandra Bose Road, Kolkata, 700020, India
| | - Upasana Ganguly
- Institute of Post Graduate Medical Education and Research (IPGMER), 244 Acharya Jagadish Chandra Bose Road, Kolkata, 700020, India
| | - Anindita Banerjee
- Institute of Post Graduate Medical Education and Research (IPGMER), 244 Acharya Jagadish Chandra Bose Road, Kolkata, 700020, India.,ICARE Institute of Medical Sciences and Research, Haldia, 721645, India
| | - Basudev Bhattacharya
- Institute of Post Graduate Medical Education and Research (IPGMER), 244 Acharya Jagadish Chandra Bose Road, Kolkata, 700020, India
| | - Lakshmi Kanta Mondal
- Regional Institute of Ophthalmology (RIO), Medical College and Hospital, Kolkata, 700073, India
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Kumar R, Bhattacharya B, Agarwal T, Chakkaravarthi S. Trans Fatty Acid Analysis of Frying Oil Using ATR-FTIR Spectroscopy: A Study on Indian Traditional Snack Foods. JFQHC 2020. [DOI: 10.18502/jfqhc.7.2.2887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Background: Trans Fatty Acid (TFA) content in oil is an important quality parameter due to its adverse health effect. This study was aimed to examine the TFA content in the frying oil used by street food vendors in India for two traditional snack foods.
Methods: Totally, 143 oil samples were collected at different frying times (0, 2, and 4 h) from five different vendors for Samosa and Jalebi. TFA levels of the oil samples were analyzed by Attenuated Total Reflection-Fourier Transform Infrared Spectroscopy (ATRFTIR). Statistical analyses were carried out using SPSS software version 23.0.
Results: ATR-FTIR spectra exhibited an increase in peak intensity at 966 cm-1 with different frying time in both frying oil samples, indicating the formation of TFA. The TFA content in oils fried at 4 h was significantly higher than the ones at 0 and 2 intervals. It was found that 3 out of 74 (4%) Samosa fried oils and 12 out of 69 (17.4%) Jalebi fried oils were over the maximum allowed regulatory limit of TFA (5%). Jalebi fried oils had significantly higher TFA content than Samosa fried oils.
Conclusion: The increase in frying time decreased the peroxide values and increased saturated fatty acids and TFA values of oils used for both food items. The local vendors and consumers should be educated by national authorities regarding health risk of TFA in street fried snacks.
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Paine SK, Basu A, Choudhury RG, Bhattacharya B, Chatterjee S, Bhattacharya C. Multiplex PCR from Menstrual Blood: A Non-Invasive Cost-Effective Approach to Reduce Diagnostic Dilemma for Genital Tuberculosis. Mol Diagn Ther 2018; 22:391-396. [PMID: 29549658 DOI: 10.1007/s40291-018-0322-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
AIM Genital tuberculosis (GTB) is a potent contributor to irreversible damage to the reproductive system and infertility in females. As no gold standard diagnostic tool is yet available, clinical suspicion and relatively insensitive approaches such as histopathology, laparoscopy and hysterosalpingogram are currently critical determinants in the diagnosis of GTB. Although a polymerase chain reaction (PCR)-based assay using endometrial tissue seems promising, sampling does require an invasive procedure. OBJECTIVE We hypothesized that menstrual blood may provide an alternate non-invasive source of samples for PCR-based GTB diagnosis. METHODS We enrolled 195 women with primary infertility in whom GTB was suspected. We obtained ethics committee approval from our institution and written informed consent from subjects. Endometrial tissue and menstrual blood was collected from the subjects and culture, histopathology, and multiplex PCR with both sample type was performed for each subject. RESULTS The sensitivity and specificity of multiplex PCR was, respectively, 90.2 and 86.1% for menstrual blood, 95.8 and 84.3% for endometrial tissue, and 64.8 and 93.2% for histopathology staining. CONCLUSIONS A strong clinical suspicion aided with multiplex PCR using menstrual blood may significantly reduce the diagnostic dilemma for GTB diagnosis in a non-invasive, sensitive, rapid, and cost-effective manner.
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Affiliation(s)
- Suman K Paine
- ICMR-Regional Medical Research Centre, NE Region, Assam, 786001, India.
| | - Analabha Basu
- National Institute of Biomedical Genomics, Kalyani, India
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Surana K, Jadhav NA, Singh PK, Bhattacharya B. Studies on polarization effect of polyethylene-based polymer electrolyte in dye and quantum dot sensitized solar cells. Appl Nanosci 2018. [DOI: 10.1007/s13204-018-0887-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Dhapola PS, Singh PK, Bhattacharya B, Surana K, Mehra RM, Gupta M, Singh A, Singh V, Sahoo NG. Electrical, thermal, and dielectric studies of ionic liquid-based polymer electrolyte for photoelectrochemical device. HIGH PERFORM POLYM 2018. [DOI: 10.1177/0954008318780218] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In this work, solution cast method was adapted for the preparation of 1-ethyl-3-methylimidazolium dicyanamide (EMImDCN)-doped solid polymer electrolyte. Optimum composition of polymer electrolyte (polyethylene oxide + sodium iodide) was treated as the host polymer. The ionic conductivity was further enhanced by adding low-viscosity ionic liquid (IL) EMImDCN. Electrical, thermal, dielectric, and photoelectrochemical properties of polymer host and IL-doped solid polymer electrolyte (ILDPE) are presented in detail. An electrochemical device, that is, dye-sensitized solar cell was fabricated using maximum conducting ILDPE film, which shows short-circuit current density of 0.118 mA/cm2, open-circuit voltage of 0.71 V, and overall efficiency of 0.061% at 1 sun condition.
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Affiliation(s)
- Pawan S Dhapola
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
- Nano Science and Nano Technology Centre, Department of Chemistry, Kumaun University, Nainital, Uttarakhand, India
| | - Pramod K Singh
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
| | - B Bhattacharya
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
- Department of Physics, MMV, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Karan Surana
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
| | - RM Mehra
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
| | - Meenal Gupta
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
| | - Abhimanyu Singh
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
- Bhaskaracharya College of Applied Sciences, University of Delhi, New Delhi, India
| | - Vijay Singh
- Department of Chemical Engineering, Konkuk University, Seoul, South Korea
| | - Nanda G Sahoo
- Nano Science and Nano Technology Centre, Department of Chemistry, Kumaun University, Nainital, Uttarakhand, India
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Abstract
Polymer electrolyte films based on poly(ethylene oxide) doped with salt sodium nitrate and ionic liquid (IL; 1-ethyl 3-methylimidazolium thiocyanate) have been prepared and characterized by differential scanning calorimetry (DSC) and impedance spectroscopy. The relative percentage of crystallinity of polymer electrolytes has been calculated by using DSC thermograms and electrical properties by using impedance spectroscopy. The incorporation of IL in polymer matrix increases the conductivity of polymer electrolyte. The maximum value of ionic conductivity of polymer electrolyte is found to be 1.93 × 10−4 S m−1 with 9 wt% IL.
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Affiliation(s)
- Sandhya Gupta
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, India
| | - Pramod K Singh
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, India
| | - B Bhattacharya
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, India
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Tuhania P, Singh PK, Bhattacharya B, Dhapola PS, Yadav S, Shukla PK, Gupta M. PVDF-HFP and 1-ethyl-3-methylimidazolium thiocyanate–doped polymer electrolyte for efficient supercapacitors. HIGH PERFORM POLYM 2018. [DOI: 10.1177/0954008318772009] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The sole aim of the present article is to develop an ionic liquid (IL)-doped solid polymer electrolyte for an electrochemical double-layer capacitor (EDLC). A solution cast technique was adopted to develop a solid polymer electrolyte of poly (vinylidene fluoride-co-hexafluoropropylene) as host polymer and low-viscosity IL (1-ethyl-3-methylimidazolium thiocyanate) as dopant. Electrochemical impedance spectroscopy measurement showed a six orders of magnitude enhancement in conductivity ( σ) by IL doping. A linear sweep voltammetric investigation of the electrolyte films exhibited a good electrochemical stability window of 3.6 V. Polarized optical microscopy of the synthesized films revealed a reduction in crystallinity by IL doping. Infrared spectroscopy further affirms the composite nature of the film. The maximum conductivity value of 2.65 mS/cm is obtained for 80% of the ionic-doped system. Using maximum conductivity film and porous carbon-based electrodes, we have developed EDLCs that show a specific capacitance value of 2.36 F/g.
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Affiliation(s)
- Pankaj Tuhania
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
| | - Pramod K Singh
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
| | - B Bhattacharya
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
- MMV, Department of Physics, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Pawan S Dhapola
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
- Nano Science and Nano Technology Center, Department of Chemistry, Kumaun University, Nainital, Uttarakhand, India
| | - Shivani Yadav
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
| | - PK Shukla
- Department of Applied Physics, I.T.S Engineering College, Greater Noida, Uttar Pradesh, India
| | - Meenal Gupta
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
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Sachdeva A, Bhattacharya B, Singh V, Singh A, Tomar SK, Singh PK. Electrical and structural properties of multi-walled carbon nanotube–doped polymer electrolyte for photo electrochemical device. HIGH PERFORM POLYM 2018. [DOI: 10.1177/0954008318772013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The present investigation deals with the preparation of multi-walled carbon nanotube (MWCNT)-doped plasticized polymer electrolyte. The nanocomposite has been prepared using solution casting method. Complex impedance spectroscopy study revealed the utmost room temperature conductivity of 5.6 × 10−4 S/cm when optimized plasticized polymer electrolyte (poly(ethyl methacrylate)+30% sodium iodide+60% ethylene carbonate) was doped with 7% MWCNT. Temperature dependence of conductivity showed Arrhenius behavior. The surface morphology and crystalline–amorphous deviation of the composite was observed using scanning electron microscope. Perfect complexation of various components of the composite was confirmed from Fourier-transform infrared spectroscopy and X-ray diffraction (XRD) data. The transference number measurement was done to calculate the proportionate amount of ionic and electronic conductivity. A dye sensitized solar cell has been fabricated using maximum ionic conductivity of solid polymer electrolyte and its electrical parameters measured at 1 sun condition.
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Affiliation(s)
- A Sachdeva
- School of Electronics and Electrical Engineering, Lovely Professional University, Phagwara, Punjab, India
- Material Research Laboratory, Sharda University, Greater Noida, Uttar Pradesh, India
| | - B Bhattacharya
- Material Research Laboratory, Sharda University, Greater Noida, Uttar Pradesh, India
- MMV, Department of Physics, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Vijay Singh
- Department of Chemical Engineering, Konkuk University, Seoul, South Korea
| | - Abhimanyu Singh
- Material Research Laboratory, Sharda University, Greater Noida, Uttar Pradesh, India
| | - SK Tomar
- Institute of Engineering and Technology, JK Lakshmipat University, Jaipur, Rajasthan, India
| | - Pramod K Singh
- Material Research Laboratory, Sharda University, Greater Noida, Uttar Pradesh, India
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Mondal LK, Bhaduri G, Bhattacharya B. Biochemical scenario behind initiation of diabetic retinopathy in type 2 diabetes mellitus. Indian J Ophthalmol 2018; 66:535-540. [PMID: 29582815 PMCID: PMC5892057 DOI: 10.4103/ijo.ijo_1121_17] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 02/10/2018] [Indexed: 12/31/2022] Open
Abstract
Purpose Despite the disease having similar glycemic status and duration microangiopathy in some patients develop within few years whereas it doesn't appear as a health complication in some diabetics for a considerable period. This study is undertaken to assess the hyperglycemia-induced biochemical background behind the development of diabetic retinopathy (DR) in type 2 diabetes mellitus (DM). Methods Following proper diagnosis, 100 patients of type 2 DM of 10-12 years duration having no DR, and 42 patients of type 2 DM of the same duration and glycemic status as the second group, with mild retinopathy were recruited in the study. Lactic acid, glutamate, malondialdehyde (MDA), nitrate, advanced glycation end-products (AGEs), peripheral blood mononuclear cell reactive oxygen species (ROS), vascular endothelial growth factor (VEGF), and its receptor 2 (VEGFR2) in these two groups were produced in an assay following standard methodology. Results Biochemical markers of anaerobic glycolysis, lipid peroxidation, AGEs, glutamate concentration, oxidative stress, and expression of VEGF and its VEGFR2 with significantly elevated markings were found in them who developed earliest stage of DR rather than them who had not. Conclusion Hyperglycemia-induced anomalous glucose metabolism, lipid peroxidation, advanced glycation, glutamate toxicity, and oxidative stress create a background where apoptosis of retinal capillary endothelial cells invite increased expression of VEGF and VEGFR2, these being the crucial factors behind the development of diabetic microangiopathy.
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Affiliation(s)
- Lakshmi Kanta Mondal
- Department of Ophthalmology, Regional Institute of Ophthalmology, Kolkata, West Bengal, India
| | - Gautam Bhaduri
- Department of Ophthalmology, MGM Medical College, Kissangang, Bihar, India
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Chatterjee S, Datta A, Chaudhuri A, Chowdhury R, Bhattacharya B. Role of endometrial cytokines of the female genital tract tuberculosis in the context of infertility. BLDE Univ J Health Sci 2018. [DOI: 10.4103/bjhs.bjhs_1_18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Mukhopadhyay S, Dutta P, Bhattacharya B, Banerjee S, Biswas S, Mukhopadhyay-Samanta B. Low Dose vs. Standard Dose Adjuvant Olanzapine in Chemotherapy Induced Nausea and Vomiting: A Prospective, Randomized, Double Blinded, Controlled Study. Clin Ther 2017. [DOI: 10.1016/j.clinthera.2017.05.053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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De A, Hasanoor Reja AH, Aggarwal I, Sen S, Sil A, Bhattacharya B, Sharma N, Ansari A, Sarda A, Chatterjee G, Das S. Use of Fine Needle Aspirate from Peripheral Nerves of Pure-neural Leprosy for Cytology and Polymerase Chain Reaction to Confirm the Diagnosis: A Follow-up Study of 4 Years. Indian J Dermatol 2017; 62:635-643. [PMID: 29263539 PMCID: PMC5724313 DOI: 10.4103/ijd.ijd_115_17] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Background: Pure neural leprosy (PNL) still remains a diagnostic challenge because of the absence of sine qua non skin lesions of leprosy and a confirmatory diagnostic method. The authors had earlier described a simple yet objective technique of combining fine needle aspiration cytology (FNAC) coupled with a multiplex polymerase chain reaction (PCR) in a pilot study, wherein the technique showed promise of a reliable diagnostic tool. In the pursuit of further evidence, the authors carried out a 4-year study with PNL cases to find the efficacy and reliability of the said method in a larger sample size. Aim: This study was conducted to find the efficacy, reliability, and reproducibility of FNAC coupled with multiplex PCR and Ziehl-Neelsen (ZN) staining in identifying the cases of PNL. Materials and Methods: All cases that were suspected to be suffering from PNL, following evaluation by two independent observers were included in the study and were subjected to FNAC from the affected nerve, and the aspirates were evaluated for cytology, ZN staining, and multiplex PCR for Mycobacterium leprae genome. In addition, serum anti-PGL1 levels were also performed in all the study subjects. Fifteen non-PNL cases were also included in the control arm. Results: A total of 47 cases were included in the test arm and subjected to FNAC. Conventional ZN staining could demonstrate acid-fast bacilli (AFB) in only 15 out of 47 cases (31.91%) while M. leprae DNA could be elicited in 37 (78.72%) cases by the multiplex PCR. Only 13 (27.65%) out of 47 cases showed anti-PGLI-1 antibody positivity. On cytological examination of the nerve aspirates, only 11 (23.40%) cases showed epithelioid cells whereas nonspecific inflammation was seen in 26 (75.60%) cases. Conclusion: The results of this study conducted over a larger sample size corroborate with the findings of our pilot study. In a resource poor set up, FNAC in combination with ZN staining and multiplex PCR is a rapid, simple, and easily performed test, which can give a reproducible and objective diagnosis in cases of PNL.
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Affiliation(s)
- Abhishek De
- Department of Dermatology, Calcutta National Medical College, Kolkata, West Bengal, India
| | | | - Ishad Aggarwal
- Department of Dermatology, IPGMER, Kolkata, West Bengal, India
| | - Sumit Sen
- Department of Dermatology, IPGMER, Kolkata, West Bengal, India
| | - Amrita Sil
- Department of Pharmacology, IPGMER, Kolkata, West Bengal, India
| | | | - Nidhi Sharma
- Department of Dermatology, Calcutta National Medical College, Kolkata, West Bengal, India
| | - Asad Ansari
- Department of Dermatology, Calcutta National Medical College, Kolkata, West Bengal, India
| | - Aarti Sarda
- Department of Dermatology, KPC Medical College, Kolkata, West Bengal, India
| | | | - Sudip Das
- Department of Dermatology, Calcutta National Medical College, Kolkata, West Bengal, India
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Ray D, Saha S, Sinha S, Pal NK, Bhattacharya B. Molecular characterization and evaluation of the emerging antibiotic-resistant Streptococcus pyogenes from eastern India. BMC Infect Dis 2016; 16:753. [PMID: 27955635 PMCID: PMC5153692 DOI: 10.1186/s12879-016-2079-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Accepted: 11/29/2016] [Indexed: 11/18/2022] Open
Abstract
Background Group A Streptococcus strains causing wide variety of diseases, recently became noticeable in eastern India, are not amenable to standard treatment protocol thus enhancing the possibility of disease morbidity by becoming antibiotic resistance. Methods The association of Lancefield group A Streptococcal variation with degree of vir architectural diversity was evaluated using emm typing and restriction fragment length polymorphism analyses. The antibiotic sensitivity patterns were examined by modified Kirby-Bauer method of disk diffusion. Percentage calculations, 95% confidence interval and one-way ANOVA were used to assess differences in proportions. Results Our observations revealed 20 different emm types and 13 different HaeIII vir typing patterns. A 1.2 kb fragment was found in all HaeIII typing pattern. Fragments of 1.2 kb and 550 bp were conserved in majority of the isolates. HinfI digestion was found proficient in differentiating the strains of same vir typing patterns. Strong predominance of speC (85%) and speF (80%) genes have been observed encoding exotoxins production. 4 isolates were found to be erythromycin resistant and were of genotype emm49. High degree of tetracycline resistance was shown by 53.57% isolates which belonged to 12 different emm genotypes. Conclusions These findings suggested that in addition to emm typing, sequential application of HaeIII and HinfI restriction enzymes in vir typing analysis is an effective tool for group A streptococcal molecular characterization associated with antibiotic resistance. Electronic supplementary material The online version of this article (doi:10.1186/s12879-016-2079-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Dipanwita Ray
- Biochemistry Research Wing, Department of Biochemistry, Dr. B C Roy Post Graduate Institute of Basic Medical Education and Research (IPGME&R), 244B, A J C Bose Road, Kolkata, 700020, India.
| | - Somnath Saha
- Nil Ratan Sarkar Medical College and Hospital, Kolkata, India
| | - Sukanta Sinha
- The West Bengal University of Health Sciences, Kolkata, India
| | | | - Basudev Bhattacharya
- Biochemistry Research Wing, Department of Biochemistry, Dr. B C Roy Post Graduate Institute of Basic Medical Education and Research (IPGME&R), 244B, A J C Bose Road, Kolkata, 700020, India. .,Health and Family Welfare Department, Directorate of Medical Education, Government of Tripura, 799001, Agartala, Tripura, India.
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Low S, Tan G, Han M, Tang B, Chang S, Wise A, Soong R, Bhattacharya B. Combination treatment with novel GLUT1 inhibitors and sorafenib in hepatocellular carcinoma. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)32659-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Sen S, Ghatak SK, Majumdar D, Sen K, Bhattacharya B. Free iron status & insulin resistance in type 2 diabetes mellitus: Analyzing the probable role of a peanut protein. Indian J Med Res 2016; 142:606-9. [PMID: 26658597 PMCID: PMC4743349 DOI: 10.4103/0971-5916.171291] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
| | | | | | - Kamalika Sen
- Department of Chemistry, University of Calcutta, Kolkata, India
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Heald AH, Bhattacharya B, Cooper H, Ullah A, McCulloch A, Smellie S, Wark G. Most commercial insulin assays fail to detect recombinant insulin analogues. Ann Clin Biochem 2016; 43:306-8. [PMID: 16824282 DOI: 10.1258/000456306777695690] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Insulin assays are utilized in various clinical scenarios, including the assessment of insulin therapy compliance or of suspected insulin overdose. In an interpretative exercise carried out by UK National External Quality Assessment Service (NEQAS), serum sent to the participating laboratories was spiked with 30 pmol/L of the short-acting insulin analogue Human Actrapid. Only two out of 24 participant laboratories had sufficient assay cross-reactivity with Actrapid to interpret the results as suggestive of insulin administration. The development of specific insulin assays has led to deterioration in the ability to detect non-compliance or overdose with recombinant insulin treatment. Clinicians should be aware of this significant limitation, which could lead to misdiagnosis.
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Affiliation(s)
- A H Heald
- Department of Diabetes and Endocrinology, University of Manchester, Salford Royal Hospitals University Trust, Hope Hospital, Stott Lane, Salford, Greater Manchester M6 8HD, UK.
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Cooper H, Bhattacharya B, Verma V, McCulloch AJ, Smellie WSA, Heald AH. Liquorice and soy sauce, a life-saving concoction in a patient with Addison's disease. Ann Clin Biochem 2016; 44:397-9. [PMID: 17594790 DOI: 10.1258/000456307780945624] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Addison's disease is a relatively common disorder to endocrinologists, but is rare and potentially fatal when presenting acutely. Treatment now involves replacement of glucocorticoids and mineralocorticoids with synthetic compounds, although historically patients took common salt and plant-based preparations. We describe the case of a 42-year-old woman who self-treated undiagnosed Addison's disease for several years with soy sauce and liquorice sticks. She presented with a four-week history of decreased energy, malaise and postural dizziness. Our patient described an unusual diet of liquorice sticks and soy sauce, consuming around 46 g of salt per week. There was a family history of Type 1 diabetes mellitus. Physical examination was unremarkable, although subsequent investigation confirmed Addison's disease. Liquorice provided glycyrrhizic acid and glycyrrhetinic acid, which act on 11-beta hydroxysteroid dehydrogenase enzymes. In this case, the net effect was potentiation of glucocorticoid action on renal mineralocorticoid receptors in the context of failing adrenocortical steroid production. The case highlights the importance of taking a dietary history to aid diagnosis.
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Affiliation(s)
- H Cooper
- Department of Medicine, Bishop Auckland General Hospital, Bishop Auckland, County Durham, UK
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Singh D, Dombe G, Bhongale C, Singh PP, Maurya M, Bhattacharya B. Shear Thickening Behaviour of Composite Propellant Suspension under Oscillatory Shear. DEFENCE SCI J 2016. [DOI: 10.14429/dsj.66.8849] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Composite propellant suspensions consist of highly filled polymeric system wherein solid particles of different sizes and shapes are dispersed in a polymeric matrix. The rheological behaviour of a propellant suspension is characterised by viscoplasticity and shear rate and time dependant viscosity. The behaviour of composite propellant suspension has been studied under amplitude sweep test where tests were performed by continuously varying strain amplitude (strain in %, γ) by keeping the frequency and temperature constant and results are plotted in terms of log γ (strain amplitude) vs logGʹ and logGʺ (Storage modulus and loss modulus, respectively). It is clear from amplitude sweep test that dynamic moduli and complex viscosity show marked increase at critical strain amplitude after a plateau region, infering a shear thickening behaviour.
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Jibreel UM, Bhattacharya B, Singh PK. Synthesis, Characterization, and Detailed Studies on Plasticized Poly(ethyl methacrylate): NH4
I Polymer Electrolyte. Adv Polym Technol 2016. [DOI: 10.1002/adv.21693] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Umar M. Jibreel
- Material Research Laboratory; School of Basic Sciences & Research; Sharda University; Greater Noida 201 310 India
| | - B. Bhattacharya
- Material Research Laboratory; School of Basic Sciences & Research; Sharda University; Greater Noida 201 310 India
| | - Pramod K. Singh
- Material Research Laboratory; School of Basic Sciences & Research; Sharda University; Greater Noida 201 310 India
- Solar Energy Institute; Ege University; Bornova 35100 Izmir Turkey
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Neetika M, Rajni J, Singh PK, Bhattacharya B, Singh V, Tomar SK. Synthesis and properties of polyaniline, poly( o-anisidine), and poly[aniline-co-( o-anisidine)] using potassium iodate oxidizing agent. HIGH PERFORM POLYM 2016. [DOI: 10.1177/0954008316639366] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Polyaniline (PANI), poly( o-anisidine), and poly[aniline-co-( o-anisidine)] were synthesized by chemical oxidative polymerization with potassium iodate as an oxidizing agent in a hydrochloric acid (HCl) medium. The self-doped, doped, and undoped forms of these polymers were characterized by infrared spectroscopy, ultraviolet–visible spectroscopy, and the conductivity method. The observed decrease in the conductivity of the copolymer and poly( o-anisidine) with respect to PANI was attributed to the incorporation of methoxy moieties into the PANI chain. The homopolymer attained conductivity in the range of 3.75 × 10−3 to 7.40 S cm−1 after doping with HCl. The conductivity of the undoped form of poly[aniline-co-( o-anisidine)] and poly( o-anisidine) was observed to be lower than 10−5 S cm−1. The conductivity of the polymer sample decreased in the following order: PANI → poly[aniline-co-( o-anisidine)] → poly( o-anisidine). The undoped form of poly[aniline-co-( o-anisidine)] had good solubility in common organic solvents.
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Affiliation(s)
- Manglik Neetika
- Department of Chemistry, Bharat Institute of Technology, Meerut, India
| | - Jain Rajni
- Department of Chemistry, Bharat Institute of Technology, Meerut, India
| | - Pramod K Singh
- Department of Physics, School of Basic Sciences and Research, Sharda University, Greater Noida, India
| | - B Bhattacharya
- Department of Physics, School of Basic Sciences and Research, Sharda University, Greater Noida, India
| | - Vijay Singh
- Department of Chemical Engineering, Konkuk University, Seoul, Republic of Korea
| | - SK Tomar
- Institute of Engineering and Technology, JK Lakshmipat University, Jaipur, India
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Ghosh M, Choudhuri S, Ray RG, Bhattacharya B, Bhattacharya S. Association of Genital Chlamydia trachomatis Infection with Female Infer-tility, Study in a Tertiary Care Hospital in Eastern India. Open Microbiol J 2015; 9:110-6. [PMID: 26464610 PMCID: PMC4598383 DOI: 10.2174/1874285801509010110] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Revised: 06/19/2015] [Accepted: 06/22/2015] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Chlamydia trachomatis is recognized as one of the most common sexually transmitted pathogen in the world. 50-80% of infected females are asymptomatic. These untreated women are at risk of developing chronic sequelae leading to tubal pathology causing infertility. Infertility is defined as 1 year of unprotected intercourse without pregnancy. It may be primary or secondary. Aim : To find out the association of genital Chlamydia trachomatis infection with female infertility. Materials and Methodology : This case control study has been carried out in collaboration with R. G. Kar Medical College and Institute of Post Graduate Medical Education & Research, India, between July 2012 and June 2013. 40 infertile and 40 pregnant women were enrolled by purposive sampling as per inclusion and exclusion criteria. ELISA test was performed to detect serum IgG and IgA antibody against recombinant analogs of MOMP and 3 different PCR assays were done targeting MOMP and rRNA DNA from DNA extracted from first void urine. Results : IgG seropositivity was significantly higher (15% vs 0%, P=.0255) in cases than controls, though there was no significant difference in the proportion of IgA seropositivity among 2 groups (12.5% vs 2.5%, P=0.2007). Out of 80 samples 2 samples showed the production of amplicons with R1 - R2 primers. Only 1 sample gave positive result with production of amplicons with all the 3 primers used (R1 - R2, CT0005 - CT06 and JM15 - JM16). Conclusion : Persistent C. trachomatis infection must be recognized as a risk factor of infertility in this region of India. The low PCR positivity in FVU sample helps to conclude the diagnostic utility of serological tests in screening of infertile women.
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Affiliation(s)
- Mallika Ghosh
- National Institute of Cholera & Enteric Diseases, Kolkata 700010, India
| | - Subhadip Choudhuri
- Department of Biochemistry, Institute of Post Graduate Medical Education & Research, Kolkata 700020, India
| | - Reena Ghosh Ray
- Department of Microbiology, R. G. Kar Medical College, Kolkata 700004, India
| | - Basudev Bhattacharya
- Department of Biochemistry, Institute of Post Graduate Medical Education & Research, Kolkata 700020, India
| | - Sujata Bhattacharya
- Department of Microbiology, R. G. Kar Medical College, Kolkata 700004, India
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De A, Reja AHH, Biswas S, Bhattacharya B, Chatterjee G, Basu K, Sarda A, Chowdhury N. Unique TTC Repeat Base Pair Loss Mutation In Cases of Pure Neural Leprosy: A Survival Strategy of Mycobacterium Leprae? Indian J Dermatol 2015; 60:351-5. [PMID: 26288401 PMCID: PMC4533531 DOI: 10.4103/0019-5154.160478] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background: Genomic reduction helps obligate intracellular microbes to survive difficult host niches. Adaptation of Mycobacterium leprae in cases of pure neural leprosy (PNL) in the intracellular niche of peripheral nerves can be associated with some gene loss. Recently, a stable but variable number of tandem repefzats (TTC) have been reported in strains of M. leprae. FolP and rpoB genes are the two common mutation sites which deal with the susceptibility of the bacteria to drugs. Aim: We attempted to find if genomic reduction of M. leprae in context of these TTC repeats or mutations in folP1 and rpoB can be the reason for the restriction of M. leprae in the nerves in PNL. Materials and Methods: DNA extracts taken from fine needle aspiration of affected nerves of 24 PNL cases were studied for tandem repeats with 21TTC primer in multiplex-PCR. Mutations were also studied by PCR Amplification of SRDR (Sulphone Resistance Determining Region) of the folP1 and multiple primer PCR amplification refractory mutation system (MARS) of the rpoB. Results: Of the 24 PNL, only 1 patient showed mutation in the rpoB gene and none in the folp1 gene. Studying the mutation in TTC region of the M. leprae gene we found that all the cases have a loss of a few bases in the sequence. Conclusion: We can conclude that there is consistent loss in the bases in the TTC region in all cases of pure neural Hansen and we postulate that it may be an adaptive response of the bacteria to survive host niche resulting in its restriction to peripheral nerves.
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Affiliation(s)
- Abhishek De
- Department of Dermatology, Institute of Post-Graduate Medical Education and Research (IPGMER), Kolkata, West Bengal, India
| | - Abu Hena Hasanoor Reja
- Department of Biochemistry, Institute of Post-Graduate Medical Education and Research (IPGMER), Kolkata, West Bengal, India
| | - Supratik Biswas
- Department of Biochemistry, Institute of Post-Graduate Medical Education and Research (IPGMER), Kolkata, West Bengal, India
| | - Basudev Bhattacharya
- Department of Biochemistry, Institute of Post-Graduate Medical Education and Research (IPGMER), Kolkata, West Bengal, India
| | - Gobinda Chatterjee
- Department of Dermatology, Institute of Post-Graduate Medical Education and Research (IPGMER), Kolkata, West Bengal, India
| | - Keya Basu
- Department of Pathology, Institute of Post-Graduate Medical Education and Research (IPGMER), Kolkata, West Bengal, India
| | - Aarti Sarda
- Department of Dermatology, KPC Medical College, Kolkata, West Bengal, India
| | - Nidhi Chowdhury
- Department of Dermatology, Institute of Post-Graduate Medical Education and Research (IPGMER), Kolkata, West Bengal, India
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Choudhuri S, Chowdhury IH, Das S, Dutta D, Saha A, Sarkar R, Mandal LK, Mukherjee S, Bhattacharya B. Role of NF-κB activation and VEGF gene polymorphisms in VEGF up regulation in non-proliferative and proliferative diabetic retinopathy. Mol Cell Biochem 2015; 405:265-79. [PMID: 25956512 DOI: 10.1007/s11010-015-2417-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2014] [Accepted: 04/18/2015] [Indexed: 01/11/2023]
Abstract
The present study was aimed to investigate the relation between nuclear factor kappa beta (NFκB) activation and downstream up-regulation of vascular endothelial growth factor (VEGF) in diabetic retinopathy (DR). Moreover the study was intended to evaluate the role of VEGF gene single nucleotide polymorphisms (SNPs) in DR occurrence and to investigate the functional relevance of VEGF gene SNPs in terms of VEGF expression in DR. Serum level of VEGF, VEGF R1 (receptor 1), VEGF R 2 (receptor 2) and NFκB (p50/65) activity was measured by enzyme linked immune sorbent assay. Genotyping and allelic composition of different SNPs i.e., rs2010963, rs3025039, rs1570360 and rs 2071559 were investigated by Taqman SNP genotyping assay. VEGF, NFκB p50/p65, and VEGF R1 & R2 gene expressions were quantified by real time quantitative polymerase chain reaction. Increased NFκB p50/p65 activity and expressions were observed in non proliferative diabetic retinopathy (NPDR) and proliferative diabetic retinopathy (PDR) subjects compared to type 2 diabetes mellitus without retinopathy (DNR) group. Significantly elevated levels of serum VEGF and highest VEGF expression were found among PDR subjects compared to DNR or NPDR subjects. CC genotype and C allele of rs2010963 and TT genotype and T allele of rs3025039 were significantly over represented among PDR subjects compared to DNR group. Increased activation of NFκβ in NPDR and PDR subjects might involve increased up regulation of VEGF. VEGF SNPs i.e., rs2010963 C allele and rs3025039 T allele might be associated with PDR occurrence and in turn regulates VEGF expression among PDR subjects.
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Affiliation(s)
- Subhadip Choudhuri
- Department of Biochemistry, Dr. B C Roy Post Graduate Institute of Basic Medical Education and Research (IPGME&R), 244B, A.J.C Bose Road, Kolkata, 700020, India,
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Mandal D, Reja AHH, Biswas N, Bhattacharyya P, Patra PK, Bhattacharya B. Vitamin D receptor expression levels determine the severity and complexity of disease progression among leprosy reaction patients. New Microbes New Infect 2015; 6:35-9. [PMID: 26106480 PMCID: PMC4475695 DOI: 10.1016/j.nmni.2015.04.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 04/07/2015] [Indexed: 12/16/2022] Open
Abstract
We studied the roles of vitamin D and its receptor, VDR, in the progression of leprosy. The majority of individuals with leprosy from Kolkata, India, with a type 1 or type 2 reaction have low levels of vitamin D3 in serum samples. Interestingly, individuals with a type 2 reaction associated with neuritis/erythema nodosum leprosum had very low VDR mRNA expression levels, ranging from 5% to 10%, compared to that of healthy control subjects; these patients also had a high bacilli index, ranging from 3+ to 5+. This is the first report to indicate that VDR expression levels may determine the complexity and severity of the progression of leprosy.
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Affiliation(s)
- D Mandal
- Department of Biochemistry, IPGMER, Kolkata, India ; Institute of Genetic Engineering, Kolkata, India
| | - A H H Reja
- Department of Biochemistry, IPGMER, Kolkata, India
| | - N Biswas
- Department of Dermatology, School of Tropical Medicine, Kolkata, India
| | | | - P K Patra
- Department of Biochemistry, Pt. J. N. M. Medical College, Raipur, Chhattisgarh, India
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Mandal K, Mandal S, Bhattacharya B, Chakraborty N. Non-convex emission constrained economic dispatch using a new self-adaptive particle swarm optimization technique. Appl Soft Comput 2015. [DOI: 10.1016/j.asoc.2014.11.033] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Singh R, Singh PK, Tomar SK, Bhattacharya B. Synthesis, characterization, and dye-sensitized solar cell fabrication using solid biopolymer electrolyte membranes. HIGH PERFORM POLYM 2015. [DOI: 10.1177/0954008315569252] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Solid biopolymer-based electrolytes have been synthesized and characterized. Potassium iodide (KI) and iodine have been added in a biopolymer (sago palm) matrix to develop solid polymer electrolyte. Relationships between electrical and ionic transport parameters have been studied in detail, and the mechanism for ion transport has been proposed. Impedance spectroscopy reveals a significant enhancement in ionic conductivity by salt doping and the conductivity maxima was obtained at 50 wt% of KI concentration and also the system displays Arrhenius behavior. Dielectric phenomenon, mobility, charge carrier density, and diffusion coefficient also supports the conductivity data. Fourier transform infrared spectroscopy confirms the formation of a complex structure, while X-ray diffraction and optical microscopy affirms the complex structure as well as a reduction of crystallinity in the biopolymer electrolyte by salt doping. A dye-sensitized solar cell fabricated using fluorine-doped tin oxide–titanium dioxide (N3 dye)/maximum conducting electrolyte showed the short-circuit current density of 2.91 × 10−4 A cm−2, open-circuit voltage of 0.58 V, and efficiency of 0.57% at 1 sun condition.
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Affiliation(s)
- Rahul Singh
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
| | - Pramod K. Singh
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
- Department of Micro and Nano System Technology (IMST), Buskerud and Vestfold University College (HBV), Tonsberg, Norway
| | - S. K. Tomar
- Department of Chemistry, Institute of Engineering and Technology, JK Lakshmipat University, Jaipur, Rajasthan, India
| | - B. Bhattacharya
- Material Research Laboratory, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
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Kshirsagar DR, Sudhir ., Khire VH, Mehilal ., Singh PP, Bhattacharya B. Evaluation of Nanoscale Copper Oxide in Hydroxyl Terminated Polybutadiene Based Composite Propellant Formulations. ACTA ACUST UNITED AC 2015. [DOI: 10.1166/asem.2015.1661] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Bhattacharya B, Low SHH, Soh C, Kamal Mustapa N, Beloueche-Babari M, Koh KX, Loh J, Soong R. Increased drug resistance is associated with reduced glucose levels and an enhanced glycolysis phenotype. Br J Pharmacol 2015; 171:3255-67. [PMID: 24597478 DOI: 10.1111/bph.12668] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Revised: 02/25/2014] [Accepted: 02/28/2014] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND AND PURPOSE The testing of anticancer compounds in vitro is usually performed in hyperglycaemic cell cultures, although many tumours and their in vivo microenvironments are hypoglycaemic. Here, we have assessed, in cultures of tumour cells, the effects of reduced glucose levels on resistance to anticancer drugs and investigated the underlying cellular mechanisms. EXPERIMENTAL APPROACH PIK3CA mutant (AGS, HGC27), and wild-type (MKN45, NUGC4) gastric cancer cells were cultured in high-glucose (HG, 25 mM) or low-glucose (LG, 5 mM) media and tested for sensitivity to two cytotoxic compounds, 5-fluorouracil (5-FU) and carboplatin, the PI3K/mTOR inhibitor, PI103 and the mTOR inhibitor, Ku-0063794. KEY RESULTS All cells had increased resistance to 5-FU and carboplatin when cultured in LG compared with HG conditions despite having similar growth and cell cycle characteristics. On treatment with PI103 or Ku-0063794, only the PIK3CA mutant cells displayed increased resistance in LG conditions. The PIK3CA mutant LG cells had selectively increased p-mTOR, p-S6, p-4EBP1, GLUT1 and lactate production, and reduced reactive oxygen species, consistent with increased glycolysis. Combination analysis indicated PI103 and Ku-0063794 were synergistic in PIK3CA mutant LG cells only. Synergism was accompanied by reduced mTOR signalling and increased autophagy. CONCLUSIONS AND IMPLICATIONS Hypoglycaemia increased resistance to cytotoxic agents, especially in tumour cells with a high dependence on glycolysis. Dual inhibition of the PI3K/mTOR pathway may be able to attenuate such hypoglycaemia-associated resistance.
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Affiliation(s)
- B Bhattacharya
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
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Bhattacharya B, Hasanoor Reja A, Biswas N, Biswas S, Lavania M, Chaitanya V, Banerjee S, Maha Patra P, Gupta U, Patra P, Sengupta U. Report of rpoB mutation in clinically suspected cases of drug resistant leprosy: A study from Eastern India. Indian J Dermatol Venereol Leprol 2015; 81:155-61. [DOI: 10.4103/0378-6323.152185] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Bhattacharya B, Singh NB, Mondal R, Sarkar U. Electronic and optical properties of pristine and boron–nitrogen doped graphyne nanotubes. Phys Chem Chem Phys 2015; 17:19325-41. [DOI: 10.1039/c5cp02938d] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The band gaps and optical responses of graphyne nanotubes can be engineered through the selection of the BN doping site and the chirality.
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Affiliation(s)
| | - N. B. Singh
- Department of Physics
- Assam University
- Silchar-788011
- India
| | - R. Mondal
- Department of Physics
- Assam University
- Silchar-788011
- India
| | - U. Sarkar
- Department of Physics
- Assam University
- Silchar-788011
- India
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Bhattacharya B, Low S, Benoukraf T, Chong M, Koh K, Soong R. 74 Increased EDN1 expression mediates acquired resistance to the combination therapy of PI3K and MEK inhibitors for colorectal cancer. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)70200-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Chowdhury IH, Choudhuri S, Sen A, Bhattacharya B, Ahmed AM, Hazra A, Pal NK, Bahar B. Serum interleukin 6 (IL-6) as a potential biomarker of disease progression in active pulmonary tuberculosis following anti-tuberculosis drug therapy. Mol Immunol 2014; 63:601-2. [PMID: 25287812 DOI: 10.1016/j.molimm.2014.09.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 09/12/2014] [Indexed: 10/24/2022]
Affiliation(s)
- I H Chowdhury
- Department of Biochemistry, Institute of Postgraduate Medical Education and Research (IPGME&R), 244B, AJC Bose Road, Kolkata 700020, India
| | - S Choudhuri
- Department of Biochemistry, Institute of Postgraduate Medical Education and Research (IPGME&R), 244B, AJC Bose Road, Kolkata 700020, India
| | - A Sen
- Department of Biochemistry, Institute of Postgraduate Medical Education and Research (IPGME&R), 244B, AJC Bose Road, Kolkata 700020, India
| | - B Bhattacharya
- Department of Biochemistry, Institute of Postgraduate Medical Education and Research (IPGME&R), 244B, AJC Bose Road, Kolkata 700020, India
| | - A M Ahmed
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Dublin, Ireland
| | - A Hazra
- Department of Pharmacology, Institute of Postgraduate Medical Education and Research (IPGME&R), 244B, AJC Bose Road, Kolkata 700020, India
| | - N K Pal
- Department of Microbiology, Institute of Postgraduate Medical Education and Research (IPGME&R), 244B, AJC Bose Road, Kolkata 700020, India
| | - B Bahar
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Dublin, Ireland.
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Abstract
We propose a new thermostat that uses all the phase space variables for controlling temperature and thus differs from the existing thermostats that control either the kinetic (e.g., Nose Hoover) or the configurational (e.g., Braga Travis) degrees of freedom. Our thermostat is a special case of the set of equations proposed by Kusnezov et al. [Ann. Phys. 204, 155 (1990)] and is derived using the extended system method. We show that it generates a canonical phase-space distribution. The performance of the thermostat is compared with those of Nose-Hoover kinetic thermostat and Braga-Travis configurational thermostat for a system (i) in thermal equilibrium, (ii) subjected to sudden temperature changes, and (iii) in steady state non-equilibrium under thermal conduction. We observe that all three thermostats perform similarly for systems in equilibrium. However, our thermostat performs the best in the thermal conduction problem by generating a consistent temperature profile across the conduction length. We expect this thermostat to be useful in other non-equilibrium scenarios as well.
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Affiliation(s)
- P K Patra
- Advanced Technology Development Center, Indian Institute of Technology, Kharagpur 721302, India
| | - B Bhattacharya
- Department of Civil Engineering, Indian Institute of Technology, Kharagpur 721302, India
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Chowdhury IH, Ahmed AM, Choudhuri S, Sen A, Hazra A, Pal NK, Bhattacharya B, Bahar B. Alteration of serum inflammatory cytokines in active pulmonary tuberculosis following anti-tuberculosis drug therapy. Mol Immunol 2014; 62:159-68. [PMID: 25019566 DOI: 10.1016/j.molimm.2014.06.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 05/30/2014] [Accepted: 06/03/2014] [Indexed: 11/29/2022]
Abstract
Active pulmonary tuberculosis (APTB) is associated with a failure of the host immune system to control the invading Mycobacterium tuberculosis (Mtb). The objective of this study was to quantify and assess the role of serum inflammatory cytokines in active pulmonary tuberculosis patients following anti-tuberculosis drug (ATD) therapy. Blood samples were collected from APTB patients and normal healthy subjects (NHS) (total n=204) at baseline and 2, 4 and 6 months post-therapy and the abundance of serum inflammatory cytokines were measured by cytokine specific ELISA. Compared to NHS, APTB patients at baseline had higher levels of serum pro-inflammatory cytokines IL-12p40 (P<0.001), IFN-γ (P<0.001), TNF-α (P<0.01), IL-1β (P<0.001) and IL-6 (P<0.001) and anti-inflammatory cytokines IL-10 (P<0.001) and TGF-β1 (P<0.001) while there was no change in the level of IL-4. In APTB patients, the serum levels of IFN-γ, TNF-α, IL-6 and TGF-β1 directly relate to the bacterial load while the TNF-α, IL-1β, IL-6 and TGF-β1 relate to radiological severity. At baseline, the IL-6 level in NHS and APTB patients differed most and following ATD therapy, this level rapidly decreased and stabilized by 4-month in APTB patients. It is concluded that a subtle reduction in the serum level of IL-6 of the APTB patients following ATD therapy might play a vital role in immune-protection of the host against Mtb infection and hence the serum IL-6 level can be a useful marker to diagnose the effectiveness of therapy in the patients.
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Affiliation(s)
- Imran Hussain Chowdhury
- Department of Biochemistry, Institute of Postgraduate Medical Education and Research (IPGME&R), 244B, AJC Bose Road, Kolkata 700020, India
| | - Albin Mostaque Ahmed
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Dublin, Ireland
| | - Subhadip Choudhuri
- Department of Biochemistry, Institute of Postgraduate Medical Education and Research (IPGME&R), 244B, AJC Bose Road, Kolkata 700020, India
| | - Aditi Sen
- Department of Biochemistry, Institute of Postgraduate Medical Education and Research (IPGME&R), 244B, AJC Bose Road, Kolkata 700020, India
| | - Avijit Hazra
- Department of Pharmacology, Institute of Postgraduate Medical Education and Research (IPGME&R), 244B, AJC Bose Road, Kolkata 700020, India
| | - Nishith Kumar Pal
- Department of Microbiology, Institute of Postgraduate Medical Education and Research (IPGME&R), 244B, AJC Bose Road, Kolkata - 700020, India
| | - Basudev Bhattacharya
- Department of Biochemistry, Institute of Postgraduate Medical Education and Research (IPGME&R), 244B, AJC Bose Road, Kolkata 700020, India
| | - Bojlul Bahar
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Dublin, Ireland; School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Dublin, Ireland.
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Reja AHH, De A, Biswas S, Chattopadhyay A, Chatterjee G, Bhattacharya B, Sarda A, Aggarwal I. Use of fine needle aspirate from peripheral nerves of pure-neural leprosy for cytology and PCR to confirm the diagnosis: a pilot study. Indian J Dermatol Venereol Leprol 2014; 79:789-94. [PMID: 24177611 DOI: 10.4103/0378-6323.120731] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND The diagnosis of pure neural leprosy (PNL) remained subjective because of over-dependence of clinical expertise and a lack of simple yet reliable diagnostic tool. The criteria for diagnosis, proposed by Jardim et al., are not routinely done by clinicians in developing country as it involves invasive nerve biopsy and sophisticated anti-PGL-1 detection. We conducted a study using fine needle aspiration cytology (FNAC) coupled with Ziehl Neelsen staining (ZN staining) and Multiplex-Polymerase Chain Reaction (PCR) specific for M. leprae for an objective diagnosis of pure neural leprosy (PNL), which may be simpler and yet reliable. AIM The aim of the study is to couple FNAC with ZN staining and multiplex PCR to diagnose pure neural leprosy patients rapidly, in simpler and yet reliable way. METHODS Thirteen patients of PNL as diagnosed by two independent consultants were included as case, and 5 patients other than PNL were taken as control in the study. Fine needle aspiration was done on the affected nerve, and aspirates were evaluated for cytology, ZN staining and multiplex-PCR. RESULTS Out of the 13 cases where fine needle aspiration was done, M. leprae could be elicited in the nerve tissue aspirates in 5 cases (38.4%) with the help of conventional acid-fast staining and 11 cases (84.6%) with the help of multiplex PCR. On cytological examination of the aspirates, only 3 (23%) cases showed specific epithelioid cells, whereas 8 (61.5%) cases showed non-specific inflammation, and 2 (15.3%) cases had no inflammatory cells. CONCLUSION Our study demonstrates that in the field of laboratory diagnosis of PNL cases, FNAC in combination with ZN staining for acid-fast bacilli (AFB) and Multiplex-PCR can provide a rapid and definitive diagnosis for the majority of PNL cases. FNAC is a less-invasive, outdoor-based and simpler technique than invasive nerve biopsy procedure. Thus, this study may enlighten the future path for easy and reliable diagnosis of PNL.
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Affiliation(s)
- Abu Hena Hasanoor Reja
- Department of Dermatology, Institute of Post Graduate Medical Education and Research, Kolkata, West Bengal, India
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Bihari B, Wani V, Rao N, Singh P, Bhattacharya B. Determination of Activation Energy of Relaxation events in composite solid propellants by Dynamic Mechanical Analysis. DEFENCE SCI J 2014. [DOI: 10.14429/dsj.64.3818] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Jawale L, Dey D, M. M, Gupta M, Bhattacharya B. Effect of Experiment Environment on Calorimetric Value of Composite Solid Propellants. DEFENCE SCI J 2013. [DOI: 10.14429/dsj.63.2896] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Choudhuri S, Dutta D, Chowdhury IH, Mitra B, Sen A, Mandal LK, Mukhopadhyay S, Bhattacharya B. Association of hyperglycemia mediated increased advanced glycation and erythrocyte antioxidant enzyme activity in different stages of diabetic retinopathy. Diabetes Res Clin Pract 2013; 100:376-84. [PMID: 23602454 DOI: 10.1016/j.diabres.2013.03.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Revised: 03/06/2013] [Accepted: 03/25/2013] [Indexed: 10/26/2022]
Abstract
AIM This study aimed to evaluate whether hyperglycemia mediated increased formation of advanced glycation end products (AGEs) was associated with erythrocyte antioxidant enzyme activity in subjects with different stages of diabetic retinopathy (DR). METHODS Serum level of AGEs was determined by enzyme linked immunosorbent assay. Erythrocyte superoxide dismutase (SOD), glutathione reductase (GR) and catalase activity were estimated by enzymatic reaction based spectrophotometric assay in patients with type 2 diabetes with proliferative diabetic retinopathy (PDR), non-proliferative diabetic retinopathy (NPDR) and no retinopathy (DNR) and also in healthy non-diabetic controls (HC). RESULT Erythrocyte SOD and GR activity was significantly lower among NPDR (p=0.024, 0.0017, respectively) and PDR (p=0.0003, 0.0001, respectively) subjects compared with DNR individuals. A significant inverse correlation was observed between serum AGEs and erythrocyte SOD or GR activity in DNR (p=0.0019; r=-0.3033, p=0.0021; r=-0.3015, respectively), NPDR (p=0.0001; r=-0.4602, p=0.0003; r=-0.4161, respectively), and PDR (p<0.0001; r=-0.6753, p<0.0001; r=-0.5854, respectively) individuals. CONCLUSION Poor glycemia may be the key factor enhancing AGE formation, which may be associated with lower erythrocyte SOD and GR activity along with increased catalase activity in DR.
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Affiliation(s)
- Subhadip Choudhuri
- Department of Biochemistry, Dr. B.C. Roy Post Graduate Institute of Basic Medical Education and Research (IPGME&R), 244B, AJC Bose Road, Kolkata 700020, India
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Dutta D, Choudhuri S, Mondal SA, Maisnam I, Reza AHH, Ghosh S, Chowdhury S, Bhattacharya B, Mukhopadhyay S. Tumor necrosis factor alpha -238G/A (rs 361525) gene polymorphism predicts progression to type-2 diabetes in an Eastern Indian population with prediabetes. Diabetes Res Clin Pract 2013; 99:e37-41. [PMID: 23298660 DOI: 10.1016/j.diabres.2012.12.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Accepted: 12/13/2012] [Indexed: 01/09/2023]
Abstract
Prediabetes (IPD; n=122) and normoglycemic individuals (n=100) underwent assessment of polymorphisms of TNFα (-238, -308) and IL6 (-174). After 27.25±5.64 months, 16 IPD had reverted to normoglycemia and 18 progressed to diabetes. TNFα -238AA/GA genotypes were significantly more common in IPD, had higher TNFα, higher progression to diabetes and lower reversal.
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Affiliation(s)
- Deep Dutta
- Department of Endocrinology & Metabolism, IPGMER & SSKM Hospital, 244 AJC Bose Road, Kolkata, India.
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Bhattacharya B, Reja AH, Dasgupta S, Chowdhury I, Chakraborty T, Dutta P, Biswas N, Biswas S, Banerjee S. Fite-Faraco staining in combination with multiplex polymerase chain reaction: A new approach to leprosy diagnosis. Indian J Dermatol Venereol Leprol 2013; 79:693-700. [DOI: 10.4103/0378-6323.116740] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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