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Featured researches published by Anita Gopesh.


Respiratory Physiology & Neurobiology | 2010

Presence of paraneuronal pseudobranchial neurosecretory system in the gill region of two air-breathing clupeids, Notopterus chitala and Notopterus notopterus

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

Localization of neurotransmitters, peptides and nNOS in the pseudobranchial neurosecretory cell system and associated carotid labyrinth of the catfish, Clarias batrachus

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

Time Course Studies on Impact of Low Temperature Exposure on theLevels of Protein and Enzymes in Fifth Instar Larvae of Eri Silkworm,Philosamia ricini (Lepidoptera: satuniidae)

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

Acetylcholinesterase: a potential biochemical indicator for biomonitoring of fertilizer industry effluent toxicity in freshwater teleost, Channa striatus

Archana Yadav; Anita Gopesh; Ravi S. Pandey; Bechan Sharma


Bulletin of Environmental Contamination and Toxicology | 2007

Fertilizer Industry Effluent Induced Biochemical Changes in Fresh water Teleost, Channa striatus (Bloch)

Archana Yadav; Anita Gopesh; Ravi S. Pandey; Bechan Sharma


Acta Zoologica | 2015

Comparative neurochemical features of the innervation patterns of the gut of the basal actinopterygian, Lepisosteus oculatus, and the euteleost, Clarias batrachus

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

Paraneuronal pseudobranchial neurosecretory cells in scorpion catfish Heteropneustes fossilis: an environment scanning electron microscope and transmission electron microscope study

Laxmi Yadav; Manvendra Sengar; Daniele Zaccone; Anita Gopesh


International Journal of Research | 2017

Distribution of diatom flora of the family Achnantheaceae in two different mountain ecoregions: The Himalaya and the Central Highland

Jyoti Verma; Prateek Srivastava; Anita Gopesh


Annals of Plant Sciences | 2017

Check list of diatom taxa from Vindhyan rivers in Central Highland region

Jyoti Verma; Prateek Srivastava; Ambrina Sardar Khan; Anita Gopesh


Acta Zoologica | 2017

Fine structure of diffused pseudobranchial neurosecretory cells associated with carotid labyrinth in an air-breathing catfish Clarias batrachus

Manvendra Sengar; Laxmi Yadav; Anita Gopesh; Daniele Zaccone; Eugenia Rita Lauriano; Gioiele Capillo

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