Anita Gopesh
Allahabad University
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Featured researches published by Anita Gopesh.
Respiratory Physiology & Neurobiology | 2010
Anita Gopesh; M. Sengar; S. Tiwari
The pseudobranchial neurosecretory system (PNS) is a system of neurosecretion observed in certain groups of teleosts, which are air-breathing or known to tolerate low oxygen tension in the surrounding water. Like other neuroendocrine cells of gill, cells belonging to this system have also been observed to have a role in condition of hypoxia. Uniformly found in all catfish species, the system was reported to be present in few non-catfish groups also, viz.-Atheriniformes, Channiformes (Devi, 1987), Perciformes, and Clupeiformes (Srivastava et al., 1981; Gopesh, 1983). In an attempt to study the structure and organization of the pseudobranchial neurosecretory system in non-catfish species of teleost, present investigation was undertaken in two species of Notopterus, viz. Notopterus chitala and Notopterus notopterus. The histological observations, using neurosecretion specific stains, undertaken on two clupeids are reported and the findings are discussed in the light of association of PNS with Carotid gland-a structure of intermediate stage in the process of transformation of pseudobranch into the carotid labyrinth, in course of evolution and also the air-breathing habit of the fish.
Acta Histochemica | 2012
Daniele Zaccone; Anita Gopesh; Giuseppe Anastasi; Angelo Favaloro; Alessandra Sfacteria; Fabio Marino
The carotid labyrinth is an enigmatic endocrine structure of unknown chemosensory function lying in the gill region of the catfishes. The carotid body is found at the carotid bifurcation of amphibians and all mammalian vertebrates on the evolutionary tree. It is a vascular expansion comprised of a cluster of glomus cells with associated (afferent and efferent) innervations. In the catfish species studied (Clarias batrachus) a neurosecretory cell system consisting of pseudobranchial neurosecretory cells connect the carotid labyrinth or large vessels (both the efferent branchial artery and dorsal aorta), and is likely akin to the glomus cells, but comparing these structures in widely divergent vertebrate species, the conclusion is that the structural components are more elaborate than those of terrestrial vertebrates. However, these cells reveal both an endocrine phenotype (such as the association with capillaries and large vessels) and the presence of regulatory substances such as neurotransmitters and neuropeptides producing good evidence for high levels of conservation of these substances that are present in the glomus cells of mammalian vertebrates. VIP-immunopositive neuronal cell bodies are detected in the periphery of the carotid labyrinth. They are presumptive local neurons that differ from pseudobranchial neurosecretory cells, the latter failing to express VIP in their soma.
Biochemistry & Analytical Biochemistry | 2017
Anita Singh; Vivek Kumar Gupta; Nikhat J. Siddiqi; Shaily Tiwari; Anita Gopesh; Bechan Sharma
Lactate dehydrogenase (LDH; EC 1.1.1.27) and malate dehydrogenase (MDH; EC 1.1.1.37) are the enzymes involved in energy metabolism of Eri silkworm, Philosamia ricini. However, no previous study has been reported about effect of low temperature exposure on their levels in different tissues of Eri silkworm. The present study was aimed to the time-course effects of low temperature (~10°C) exposure of 5th instar P. ricini on the levels of protein and energy metabolism enzymes of three major tissues (haemolymph, silk gland and fat body). The Eri silkworm larvae, reared on fresh leaves of castor-oil-plant (Ricinus communis), were divided into 4 groups: a control group reared at 25 ± 2°C along with three experimental groups reared at 10 ± 1°C containing 50 larvae in each, for varying durations (2, 4 and 7 days). The cell free extract was prepared by centrifuging the tissue homogenate at 9000 g and used for biochemical estimations (total protein content, lactate dehydrogenase and malate dehydrogenase activities). For isozyme analysis, another set of homogenates (20% w/v) was prepared in buffer (0.2 M Tris HCl, pH 7.0) containing 0.2 M sucrose and 10 mM EDTA, and analyzed by native-PAGE followed by activity staining. The activities of lactate dehydrogenase and malate dehydrogenase showed significant decrease in haemolymph, whereas in fat bodies both enzymes showed increased activity. In silk gland, Lactate dehydrogenase activity decreased uniformly, whereas malate dehydrogenase activity increased at all exposure durations. The isozyme analysis revealed significant perturbations in their expression profiles. The low temperature exposure resulted into accumulation of protein content in haemolymph and depletion in silk gland and fat body tissues. Fat bodies emerged as the main energy producing organ under this condition. Lactate dehydrogenase and malate dehydrogenase displayed presence of only one isozyme in all the tissues tested. The isozyme behaviour of lactate dehydrogenase and malate dehydrogenase towards low temperature varied in different tissues. These results suggested that alterations in expression and functions of these enzymes might be associated to the acclimation of larvae at low temperature.
Ecotoxicology | 2009
Archana Yadav; Anita Gopesh; Ravi S. Pandey; Bechan Sharma
Bulletin of Environmental Contamination and Toxicology | 2007
Archana Yadav; Anita Gopesh; Ravi S. Pandey; Bechan Sharma
Acta Zoologica | 2015
Giacomo Zaccone; Eugenia Rita Lauriano; Giuseppa Silvestri; Christopher P. Kenaley; José M. Icardo; Simona Pergolizzi; Alessio Alesci; Manvendra Sengar; Michał Kuciel; Anita Gopesh
Acta Zoologica | 2013
Laxmi Yadav; Manvendra Sengar; Daniele Zaccone; Anita Gopesh
International Journal of Research | 2017
Jyoti Verma; Prateek Srivastava; Anita Gopesh
Annals of Plant Sciences | 2017
Jyoti Verma; Prateek Srivastava; Ambrina Sardar Khan; Anita Gopesh
Acta Zoologica | 2017
Manvendra Sengar; Laxmi Yadav; Anita Gopesh; Daniele Zaccone; Eugenia Rita Lauriano; Gioiele Capillo