Our lab has been working on
Entamoeba histolytica, a unicellular, anaerobic protozoan parasite that causes amebiasis or amebic dysentery in humans. The life cycle of
Entamoeba is biphasic and consists of the motile trophozoite form and the non-motile cyst form. Encystation is a complex process marked by the formation of the chromatoid body, glycogen granule, and formation of four nuclei and deposition of a chitin wall. The primary aim of our lab is to understand the regulation of gene expression and unravel the components of signal transduction pathways during encystation.
Entamoeba invadens, a reptilian parasite, is used as a model organism because of its ability to undergo encystation under in vitro conditions. We are also interested in various aspects like nuclear division, stress-related cell signaling pathways (MAPK and AMPK pathways), the role of nucleotide sugar transporter in chitin synthesis during encystation. The other major project in the lab concerns the screening and characterization of several surface antigens for the development of potential diagnostic markers and identification of potential vaccine candidates, and the identification of new drug targets and understanding the mechanism of activation of metronidazole, the prodrug. We have discovered three novel kinases responsible for the early signaling of encystations.Our pioneering work also includes identification of miRNA, presence of probable sex, and Topoisomerase system in
Entamoeba.
Our recent contribution to Entamoeba motility is a brilliant addition that established the Amoeba as an excellent model for cellular migration, including cancer cells. Our group have recently discovered and characterized the Apoptosis-Inducing Factor (AIF) and TALE homeodomain protein transcription factor in Entamoeba for the first time. Development of an Entamoeba detection kit based on newly identified surface markers is in progress.
He is also involved in Plant Biotechnology research and Nanoparticle-based drug delivery.
For List of Publications:
https://www.ncbi.nlm.nih.gov/myncbi/1Zqmb89t9rv/bibliography/public/
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Overexpression of P glycoprotein gene1 by transfected Entamoeba histolytica confers emetine-resistance. Ghosh SK, Lohia A, Kumar A andSamuelson J By Mol Biochem Parasitol 82 257-60 (1996)
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Three-amino acid loop extension homeodomain proteins regulate stress responses and encystation in Entamoeba Meenakshi .., Balbhim S. S., Sarkar S. , Vasudevan M. , Ghosh S. K. By Molecular Microbiology 1-22 (2023)
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Hsp60 is targeted to a cryptic mitochondrion-derived organelle (crypton ) in the microaerophilic protozoan parasite Entamoeba histolytica Mai Z, Ghosh SK, Frisardi M, Rogers R and Samuelson J By Mol. Cell Biol 19 2198-2205 (1999)
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Giardia, Entamoeba,Trichomonas enzymes activate metronidazole (nitroreductase) and inactivate metronidazole (NIMs) Pal D, Banerjee S, Cui J, Swartz A, Ghosh SK and Samuelson J By Antimicrobial Agent Chemotherapy 53 458-64 (2009)
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Evidence for a "wattle and daub" model of the cyst wall of entamoeba Chatterjee A., Ghosh S. K., Jang K, Bullitt E, Moore L, Robbins Pw, Samuelson J ,. By PLoS Pathog 5 - (2009)
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Cellular Events of Multinucleated Giant Cells Formation During the Encystation of Entamoeba invadens Krishnan D., Ghosh S. K. By Front Cell Infect Microbiol 8 1-13 (2018)
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The chitin biosynthesis pathway in Entamoeba and the role of Glucosamin-6-P isomerase by RNA interference Samanta SK and Ghosh SK By Mol. Biochem. Parasitol 186 60-68 (2012)
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Stress-responsive Entamoeba Topoisomerase II: A Potential Antiamoebic Target Varghese S. S., Ghosh S. K. By FEBS Letter 1-16 (2019)
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Morphological and motility features of the stable bleb driven monopodial form of Entamoeba and its importance in encystation Krishnan D., Ghosh S. K. By Infection and Immunity 88 1-25 (2020)
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Apoptosis-inducing factor-like protein-mediated stress and metronidazole-responsive programmed cell death pathway in Entamoeba histolytica Bandyopadhyay A., Ghosh S.K. By Molecular Microbiology 119 640-658 (2023)
Principal Investigator
- Development of Antheraea Mylitta Cypoviral Detection System by Producing Monoclonal Antibodies against Viral Capsid Protein
Ph. D. Students
Amrita Nandi
Area of Research: Molecular and cellular biology of Parasitology
Chandrika Gupta
Area of Research: Bioproduct development & characterization
Meenakshi
Area of Research: Molecular biology of parasite
Moumita Ghosh
Area of Research: Molecular and cellular biology of Prasite
Sandip Shit
Area of Research: Nutraceuticals biotechnology
Shilpa Sarkar
Area of Research: Molecular cell biology of Entamoeba
Sonar Shubham Balbhim
Area of Research: Recombinant protein production and characterization
Sumedha Saha
Area of Research: Genetic Engineering in Algae
Susanta Kayet
Area of Research: Molecular and cellular biology of Parasite
Tiasha Chakraborty
Area of Research: Molecular and cellular biology of Prasitology