Publications by authors named "Angshuman Sarkar"

Introduction: Cross-talk among biological pathways is essential for normal biological function and plays a significant role in cancer progression. Through integrated network analysis, this study explores the significance of pathway cross-talk in colorectal cancer (CRC) development at both the pathway and gene levels.

Methods: In this study, we integrated the gene expression data with domain knowledge to construct state-dependent pathway cross-talk networks.

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Snake venoms are known to contain toxins capable of interfering with normal physiological processes of victims. Specificity of toxins from snake venoms give scope to identify new molecules with therapeutic action and/or help to understand different cellular mechanisms. Russell's viper venom (RVV) is a mixture of many bioactive molecules with enzymatic and non-enzymatic proteins.

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This meta-analysis investigated the efficacy, safety, and tolerability of lamotrigine versus placebo in preventing relapse and recurrence of mood episodes in women of childbearing age with bipolar I disorder. Following up to 16 weeks' open-label lamotrigine treatment, responders were randomized to double-blind treatment, including lamotrigine 100-400 mg/day or placebo, in four trials of up to 76 weeks. Women aged 18-45 years who received ≥ 1 dose of study treatment and had ≥ 1 efficacy assessment in the double-blind phase were pooled for efficacy analysis.

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Vipegrin is a 6.8 kDa Kunitz-type serine proteinase inhibitor purified from Russell's viper (Vipera russelii russelii) venom. Kunitz-type serine proteinase inhibitors are non-enzymatic proteins and are ubiquitous constituents of viper venoms.

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Elucidation of the photophysical and biochemical properties of small molecules can facilitate their applications as prospective therapeutic imaging (theragnostic) agents. Herein, we demonstrate the luminescence behavior of a strategically designed potential therapeutic thiosemicarbazone derivative, ()-1-(4-(diethylamino)-2-hydroxybenzylidene)-4,4-dimethylthiosemicarbazide (DAHTS), accompanied by the illustration of its solvation and solvation dynamics using spectroscopic techniques and exploring its promising antitumor activities by adopting the necessary biochemical assays. Solvent-dependent photophysical properties, namely UV-vis absorption, fluorescence emission, and excitation profiles, concentration-dependent studies, and time-resolved fluorescence decays, serve as footprints to explain the existence of DAHTS monomers, its excited-state intramolecular proton transfer (ESIPT) product, and dimeric and aggregated forms.

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Colorectal cancer (CRC) is the third most diagnosed cancer in the world. A better understanding of the molecular mechanism of CRC is essential for making novel strategies for the CRC management and its prevention. The present study aims to explore the molecular mechanism through integrated bioinformatics analysis by analyzing genes and their co-expression pattern in normal and CRC states.

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Disintegrins are small peptides possessing a tripeptide motif capable of binding to integrins. These were first isolated from viper venoms and are now also found in many other hematophagous organisms. Many integrins have been studied for their role in the onset of disease and the interaction of disintegrins with these receptors makes them potential therapeutic molecules.

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Serine Proteinase Associated Disintegrin-1 (SPAD-1) is a low molecular mass (26 kDa) positively charged protein purified from Russell's viper venom (RVV) possessing cytotoxic activity on MCF7, human breast cancer cells. Primary sequence analysis of the protein confirms that it is a novel Snake Venom Serine Proteinase (SVSP) and a member of the trypsin family. SPAD-1 contains a conserved triad of Histidine (H), Aspartic acid(D) and Serine(S) residues at its active site for proteinase activity and also an adjacent histidine-glycine-aspartic acid (HGD) disintegrin-like motif.

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Invasive ductal carcinoma (IDC) is the most recurrent cancer, accounting for 80% of all breast cancers worldwide. Originating from the milk duct, it eventually invades the fibrous tissue of the breast outside the duct, proliferation takes 1-2 months for each division. Quinacrine (QC), an FDA-approved small molecule, has been shown to have anti-cancer activity in numerous cancerous cell lines through diverse pathways; ultimately leading to cell death.

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Background: Quinacrine (QC) is popular for its anti-malarial activity. It has been reported exhibiting anti-cancerous properties by suppressing nuclear factor-κB and activating p53 signaling; however, its effect on cellular pathways in human non-small cell lung cancer (NSCLC) has not been studied.

Materials And Methods: Binding of QC with GSTA1 was studied computationally as well as through GST activity assay kit.

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Quinacrine (QC), an FDA-approved anti-malarial drug, has shown to have anticancer activities. Due to its 'shotgun' nature, QC has become an inevitable candidate for combination chemotherapy. There is lack of study of the molecular interplay between colorectal cancer (CRC) microenvironment and its metastasis.

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Type II alveolar cells are highly robust in nature, yet susceptible to aerosolized nanoparticles (NPs). Dysfunction in these specialized cells, can often lead to emphysema, edema, and pulmonary inflammation. Long-time exposure can also lead to dangerous epigenetic modifications and cancer.

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In the development of small-molecule drug candidates, naphthalimide-based compounds hold a very important position as potent anticancer agents with considerable safety in drug discoveries. Being synthetically and readily accessible, naphthalimide compounds with planar architecture have been developed mostly as DNA-targeting intercalators. However, in this article, it is demonstrated, for the first time, that an unfused naphthalimide-benzothiazole bichromophoric compound 2-(6-chlorobenzo[ d] thiazol-2-yl)-1 H-benzo[ de] isoquinoline-1,3(2 H)-dione (CBIQD), seems to expand the bioactivity of naphthalimide as anti-mitotic agent also.

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Metal oxides (MeOx) are exponentially being used in a wide range of applications and are the largest class of commercially produced nanomaterials. This presents unprecedented human exposure. Thus, understanding nanoparticle induced cellular stress can greatly help design strategies to combat them.

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Rhizostoma pulmo (Barrel Jellyfish) is one of the commonly found jellyfishes on the South-Goan coast of India. Here we present characterization of R. pulmo tentacle extract.

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'Daboialectin', a low molecular weight C-type lectin (18.5 kDa) isolated from Russell's viper venom showed cytotoxic effects on human broncho-alveolar carcinoma derived (A549) cell lines. Daboialectin induced inhibition of A549 cell growth was time and concentration dependent with severe morphological changes by altering the functions of small GTPases such as Rac, Rho and cdc42.

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Cadmium is one of the age old toxic heavy metal, detrimental to the biological system. In this study, we explored the cellular and molecular mechanisms induced on exposure to different concentrations of cadmium chloride (CdCl), on three different human cell lines with wild type p53, ., A549, HEK293 and HCT116.

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A metalloproteinase anticoagulant toxin of molecular weight 66 kDa has been purified from the venom of Indian monocled cobra (Naja kaouthia). This toxin named as NKV 66 cleaved fibrinogen in a dose and time dependent manner. The digestion process was specific to Aα chain and cleaved fibrinogen to peptide fragments.

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Russell's viper with its five sub-species is found throughout the Indian subcontinent. Its venom is primarily hemotoxic. However, its envenomation causes damage to several physiological systems.

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Growth of the ornamental fish industry is being hindered by the scarcity of low cost feed; hence alternative protein supplements should be explored. In this context the present study aims to evaluate whether the grasshopper Oxya fuscovittata could be used as a supplement for fish meal in the diets of Poecillia sphenops, which is one of the most common ornamental fishes worldwide. The present work is divided into three phases: In the first phase proximate composition of the grasshopper is obtained and five diets are prepared where fish meal is gradually replaced by Oxya meal and named as control, D1, D2, D3 and D4.

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A low molecular weight anti-platelet peptide (6.9 kDa) has been purified from Naja kaouthia venom and was named KT-6.9.

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In biomedical and epidemiological studies, often outcomes obtained are of mixed discrete and continuous in nature. Furthermore, due to some technical inconvenience or else, continuous responses are censored and also a few covariates cease to be observed completely. In this paper, we develop a model to tackle these complex situations.

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Moon jellyfish (Aurelia aurita) tentacle extract was studied for its anticoagulant activity in vitro. The Jellyfish Tentacle Extract (JFTE) showed very strong fibrinogenolytic activity by cleaving Aα and Bβ chain of fibrinogen molecule. The fibrinogenolytic activity was found to be stronger than some snake venom derived anticoagulants.

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Production of specialized cells from precursors depends on a tightly regulated sequence of proliferation and differentiation steps. In the gonad of Drosophila melanogaster, the daughters of germ line stem cells (GSC) go through precisely four rounds of transit amplification divisions to produce clusters of 16 interconnected germ line cells before entering a stereotypic differentiation cascade. Here we show that animals harbouring a transposon insertion in the center of the complex nucleoporin98-96 (nup98-96) locus had severe defects in the early steps of this developmental program, ultimately leading to germ cell loss and sterility.

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