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

Gopesh, Anita; Sengar, Manvendra; Tiwari, Satyendra

doi:10.1016/j.resp.2010.02.012

Cited by 6 publications

(10 citation statements)

References 46 publications

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“…Investigations on these cells have resulted in the establishment of a third neurosecretory system for fishthe pseudobranchial neurosecretory system (PNS) (Srivastava et al 1981;Gopesh 1983;Srivastava and Gopesh 1987). The presence of PNS is ubiquitous in catfishes including marine ones (S. order Siluroidei; order Siluriformes) (Gopesh 1983;Gopesh and Srivastava 1997;Gopesh et al 2002) but it is also present in other fish species (Srivastava et al 1981;Gopesh 1983Gopesh , 2009Srivastava and Gopesh 1987;Gopesh et al 2010). Bioactive substances have been identified in these cells (Gopesh et al 2003;Zaccone et al 2012).…”

Section: Pseudobranchial Neurosecretory Systemmentioning

confidence: 99%

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

Sengar

Yadav²,

Gopesh

et al. 2014

Acta Zoologica

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Fish are known to have branchial chemoreceptors and even extrabranchial chemoreceptors to meet the challenges of aquatic environment. The pseudobranchial neurosecretory system associated with carotid labyrinth (CL) is one such example. CL – a chemosensory organ is well known in amphibians. The homologous structure also exists in fish. Clusters of neurosecretory cells, close to the CL and the first two efferent branchial arteries occur in catfish and a few other groups of teleosts. These cells belong to the pseudobranchial neurosecretory system (PNS). To reveal the ultrastructure of CL and the pseudobranchial neurosecretory cells (PNSCs), environmental scanning electron microscope (ESEM) and transmission electron microscope (TEM) investigations were made in an Asian air‐breathing catfish Clarias batrachus. Under ESEM, the PNS appeared as a mass of cells innervated by nerves and supplied by blood capillaries. The CL appeared to have a network of blood capillaries. The transmission electron microscopic investigations showed pear shaped PNSCs having different sizes of dense cored vesicles (DCVs), numerous mitochondria, nerve varicosities, indicating a secretory function of the cells. The CL shows a close association with PNSCs and smooth muscles. Although the exact function of the CL and associated PNSCs in the biology of fish is far from clear, their morphology suggests they are involved in a stress response such as to hypoxia.

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Section: Pseudobranchial Neurosecretory Systemmentioning

confidence: 99%

“…; Gopesh , ; Srivastava and Gopesh ; Gopesh et al . ). Bioactive substances have been identified in these cells (Gopesh et al .…”

Section: Introductionmentioning

confidence: 97%

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

Sengar

Yadav²,

Gopesh

et al. 2014

Acta Zoologica

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“…1981; Gopesh 1983), carotid gland in Notopterus chitala and N. Notopterus (Srivastava et al. 1981; Gopesh 1983, 2009; Gopesh et al. 2010), and the carotid labyrinth in catfishes (Singh 1982; Gopesh 1983; Devi 1987; Prakash 1993; Gopesh and Srivastava 1997; Gopesh et al.…”

Section: Introductionmentioning

confidence: 99%

“…The system is found to occur in both marine as well as fresh water catfishes and a few other unrelated groups of teleosts (Table 1). On the basis of its occurrence in close proximity of pseudobranch in Glossogobius giuris (Srivastava et al 1981;Gopesh 1983), carotid gland in Notopterus chitala and N. Notopterus (Srivastava et al 1981;Gopesh 1983Gopesh , 2009Gopesh et al 2010), and the carotid labyrinth in catfishes (Singh 1982;Gopesh 1983;Devi 1987;Prakash 1993;Gopesh and Srivastava 1997;Gopesh et al 2003), a chemosensory role has been speculated for the cells of this system, as carotid labyrinth is a structure known for its chemoreceptive function in fishes (Srivastava and Singh 1980;Munshi and Hughes 1981;Srivastava and Pandey 1984a,b;Pandey 1985;Srivastava et al 1988;Singh 1982) and amphibians (Kusakabe 2002).…”

Section: Introductionmentioning

confidence: 99%

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

Yadav¹,

Sengar

Zaccone

et al. 2011

Acta Zoologica

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Yadav, L., Sengar, M., Zaccone, D. and Gopesh, A. 2011. Paraneuronal pseudobranchial neurosecretory cells in scorpion catfish Heteropneustes fossilis: an environment scanning electron microscope and transmission electron microscope study. —Acta Zoologica (Stockholm) 00: 1–8. Pseudobranchial neurosecretory system (PNS), found in the gill region of certain groups of teleosts, falls under the category of the ‘diffuse neuroendocrine system’ (DNES). The cells belonging to the system share morpho‐functional features with the paraneuronal cells observed in respiratory tract and airway surfaces of higher vertebrates. On the basis of the experimental observations, a role in condition of hypoxia has been recorded for this system. In an attempt to elucidate the ultrastructure of pseudobranchial neurosecretory cells, present investigation was undertaken using environment scanning electron microscope (ESEM) and TEM in an air‐breathing catfish, Heteropneustes fossilis. The external morphology of PNS under ESEM appeared as a mass of cells supplied with nerves and blood capillaries. Each cell mass is made up of numerous pear‐shaped neurosecretory cells, confirmed by neurosecretion‐specific acid violet stain. The TEM investigation of the cells revealed the presence of different sizes of dense‐cored vesicles in the cytoplasm, which was observed as granular cytoplasm under light microscope. Presence of large number of mitochondria in the cytoplasm confirmed active involvement of these cells in the physiology of fishes. Although lacuna prevails regarding the exact function of this system of fish, its probable role in hypoxic condition and surfacing behavior are speculated.

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Control of Breathing in Ectothermic Vertebrates

Milsom

Gilmour

Perry

et al. 2022

Comprehensive Physiology

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

Cited by 6 publications

References 46 publications

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

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

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

Control of Breathing in Ectothermic Vertebrates

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