Publications by authors named "Purabi Deka Bose"

Background: Non-alcoholic fatty liver disease (NAFLD) in non-obese patients is pathophysiologically distinct, exhibiting common immunological link with type-2 diabetes mellitus (T2DM). This study aims to delineate the role of Toll-like receptor 2 (TLR2)-mediated immuno-modulation along with its association with fibroblast growth factor receptor 4 (FGFR4) and its ligand fibroblast growth factor 19 (FGF19) in the pathogenesis of NAFLD without or with T2DM.

Methodology: Blood samples were collected from patients with NAFLD (n = 90), NAFLD with T2DM (n = 90) and healthy cohorts (n = 90) with consent and clinical records.

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Leukemias are a set of clonal hematopoietic malignant diseases that develop in the bone marrow. Several factors influence leukemia development and progression. Among these, the gut microbiota is a major factor influencing a wide array of its processes.

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Problem: Recurrent pregnancy loss (RPL) is the spontaneous loss of two or more consecutive pregnancies prior to 20 weeks of gestation, occurring in 1% of the reproductive-age population. It is a major cause of infertility in India with a staggering 7.46% prevalence rate.

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Regulated oxidative stress (OS) is important during pregnancy. Sporadic studies suggest the significance of deregulated OS in hepatitis E virus (HEV) infected pregnancy, but with limited reactive oxygen species (ROS) or antioxidant markers. The present novel study, therefore, aimed to evaluate the significance of ROS-antioxidant imbalance and resulting altered OS in HEV infected pregnancy complications like preterm delivery (PTD) and outcome.

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Background: Lacunae exist in understanding the underlying etiology in majority of recurrent pregnancy loss (RPL) cases. Given the significance of regulated immune-modulation in pregnancy, and the central role of pro-inflammatory TNF-α plays in it; this study targeted to appraise the significance of TNF-α profile in RPL pathogenesis in an ethnically distinct population from Assam, India.

Methods: Term delivery, medically terminated pregnancy (MTP) and RPL cases (based on ASRM criteria) were enrolled with no anatomical and chromosomal abnormalities or pathological infections; and blood and/or placenta/product of conceptus (POC) tissue samples were collected with informed consent.

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With the background of association of oxidative stress and Hepatitis E virus (HEV) infection in pregnancy complications the present novel study aimed to evaluate the significance of changes in maternal homocysteine levels and the related mechanism(s) in the pathophysiology of HEV related pregnancy complications and negative outcomes. Term delivery (TD, N = 194) and HEV-IgM positive pregnancy cases [N = 109] were enrolled. Serum and placental homocysteine levels were evaluated by ELISA and immunofluorescence and in turn correlated with serum Vitamin B12 levels.

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Background: As per WHO, Cervical cancer (CaCx) is a global issue, being the fourth common cancer in women with incidence rate of 13.1 per 1 lakh women globally and accounting for 311000 deaths in the year 2018 itself globally. The molecular pathogenesis in Human papillomavirus (HPV) infected cases is inconclusive.

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Article Synopsis
  • - This study investigates the role of telomerase and cervical cancer stem cells (CSCs) in the development of cervical cancer (CaCx) in patients infected with HPV16, focusing on 65 cases from Northeast India.
  • - Researchers analyzed the expression of viral proteins E6 and E7, as well as telomerase components (hTERT and hTR) using techniques like real-time PCR and immunofluorescence, finding that these factors correlate with CaCx severity and susceptibility.
  • - The results suggest that the interaction between the telomerase pathway and CSC marker OCT4, particularly influenced by HPV16 E6 protein expression, could be important for both understanding cervical cancer pathogenesis and developing potential therapies. *
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Article Synopsis
  • The study examines the link between human papillomavirus (HPV) infection and cervical cancer (CaCx) in an ethnically unique population from Northeast India, focusing on the immune response.
  • It involves analyzing 76 CaCx cases, 25 cases of cervical intraepithelial neoplasia (CIN), and 50 healthy controls, using techniques like PCR for HPV screening and various assays to measure cytokine levels.
  • Results show that TNF-α is downregulated in CaCx, and its decreasing levels correlate with disease progression, while the HPV16 E6 and E7 viral transcripts are significantly upregulated, indicating a critical interaction between immune response and HPV-mediated cervical cancer development.
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  • The study investigates how the TYMS 14946bp deletion polymorphism and high homocysteine levels relate to the risk of preterm delivery (PTD) in pregnant women, highlighting their impacts on neonatal outcomes like mortality and low birth weight (LBW).
  • It analyzed 209 PTD cases and 194 term delivery cases, finding that the TYMS 14946bp del/del genotype significantly increases the risk of PTD and is linked to higher rates of fetal death and LBW compared to other genotypes.
  • The findings underscore the clinical relevance of these genetic factors and elevated homocysteine levels in predicting PTD and poor pregnancy outcomes, emphasizing the need for
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Article Synopsis
  • Preterm delivery (PTD) significantly contributes to neonatal mortality and morbidity, with its underlying causes often unclear, especially in Northeast India, where PTD rates are high.
  • A study involving 109 PTD cases and 100 term delivery cases examined the relationship between deregulation in the progesterone receptor (PR) pathway and immune responses related to PTD.
  • Findings indicated that downregulation of PR and its downstream effectors like PIBF correlates with increased susceptibility to PTD, lower gestational periods, and poor pregnancy outcomes, linked to an inflammatory immune response characterized by higher TNF-α and lower IL-10 levels.
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Article Synopsis
  • Preterm delivery (PTD) is a major cause of neonatal health issues, especially prevalent in Northeast India, making it a significant concern for maternal and infant health.
  • The study evaluates the impact of genetic factors, specifically MTHFR gene polymorphism and progesterone receptor (PR) gene mutation (PROGINS), on the risk of PTD, poor pregnancy outcomes, and low birth weight (LBW) among Northeast Indian women.
  • Results indicate that both genetic factors increase the likelihood of PTD and negative pregnancy outcomes, with MTHFR C677T polymorphism being particularly predictive and useful for identifying at-risk pregnancies.
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The incidence and severity of hepatitis E virus (HEV) infection in pregnant women is high in developing countries. Transplacental transmission of HEV in the third trimester of pregnancy has been found to be associated with high fetal mortality. Based on this evidence and in the absence of reports on HEV replication in extrahepatic sites, this study was carried out to investigate if HEV replication occurs in the placenta of infected mothers.

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Background And Aim: Antituberculosis drugs, isoniazid and rifampicin, in combination, are known to develop drug-induced hepatotoxicity (DIH). A higher risk of DIH during antituberculosis treatment (ATT) has been reported in the Indian subcontinent compared to its Western counterparts. The role of genetic factors in a higher incidence of ATT hepatotoxicity in the Indian population is still unclear.

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Background & Aims: Hepatitis E virus (HEV) infection is associated with high maternal and fetal mortalities. A prospective study was undertaken to evaluate the role of viral and host factors in HEV related pregnancy outcomes.

Methods: The study included HEV infected pregnancy cases; acute viral hepatitis (AVH), n=100 and fulminant hepatic failure (FHF), n=43, and healthy pregnancy cases, n=50.

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Aim: To investigate hepatitis virus, genetic and environmental factors, and their interactions in predisposing patients to liver diseases in Northeast India.

Methods: A total of 104 jaundice patients and 124 community controls were included. Serological analysis was performed by routine enzyme-linked immunosorbent assay, and nucleic acid testing for hepatitis viruses was done by polymerase chain reaction (PCR), followed by PCR direct sequencing for viral genotyping.

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