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Juan Perez - One of the best experts on this subject based on the ideXlab platform.
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Hypophysial and extrahypophysial projections of the Neurosecretory System of cartilaginous fishes: an immunocytochemical study using a polyclonal antibody against dogfish neurophysin.
The Journal of Comparative Neurology, 1996Co-Authors: Patrick Meurling, Patricio Peña, Jesús M. Grondona, E M Rodriguez, Juan PerezAbstract:Immunocytochemistry using antibodies against the neurohypophysial nonapeptides has given equivocal results regarding relevant aspects of the classical Neurosecretory System of elasmobranchs. The lack of antibodies reacting with the elasmobranch neurophysins (Nps) has prevented the study of this Neurosecretory System by Nps immunocytochemistry. This led us to purify Nps from Scyliorhinus canicula, and to use them to raise a polyclonal antibody. This antibody reacted strongly with the elasmobranch neurophysin neurons, revealing their most delicate and distant hypophysial and extrahypophysial projections. A detailed mapping of the Neurosecretory System of five elasmobranch species (Etmopterus spinax, Squalus acanthias, Scyliorhinus canicula, Galeus melanostomus, Raja radiata) and one holocephalian species (Hydrolagus colliei) was performed. In elasmobranchs, the magnocellular neurophysin cells formed a distinct preoptic nucleus, whereas in Hydrolagus the immunoreactive cells were scattered. Distinct parvicellular neurophysin cells were present in the preoptic nucleus. In Raja the nucleus “O” contained parvicellular Nps-immunoreactive neurons. The findings at the pituitary level point to the possibility that neurophysin neurons, in addition to releasing nonapeptides into the Systemic capillaries of the neural lobe, also participate in the regulation of the function of the rostral, medial and intermediate lobes of the adenohypophysis by a dual mechanism, i.e., a neurovascular pathway and a direct neural input. The extrahypophysial projections of the neurophysin neurons were highly developed to a degree not comparable to any other vertebrate group. The targets of these projections were located in the telencephalon, diencephalon and hindbrain. The evolutionary and functional implications of this phenomenon are discussed. © 1996 Wiley-Liss, Inc.
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Hypophysial and extrahypophysial projections of the Neurosecretory System of cartilaginous fishes: an immunocytochemical study using a polyclonal antibody against dogfish neurophysin.
The Journal of comparative neurology, 1996Co-Authors: Patrick Meurling, Patricio Peña, Jesús M. Grondona, E M Rodriguez, Juan PerezAbstract:Immunocytochemistry using antibodies against the neurohypophysial nonapeptides has given equivocal results regarding relevant aspects of the classical Neurosecretory System of elasmobranchs. The lack of antibodies reacting with the elasmobranch neurophysins (Nps) has prevented the study of this Neurosecretory System by Nps immunocytochemistry. This led us to purify Nps from Scyliorhinus canicula, and to use them to raise a polyclonal antibody. This antibody reacted strongly with the elasmobranch neurophysin neurons, revealing their most delicate and distant hypophysial and extrahypophysial projections. A detailed mapping of the Neurosecretory System of five elasmobranch species (Etmopterus spinax, Squalus acanthias, Scyliorhinus canicula, Galeus melanostomus, Raja radiata) and one holocephalian species (Hydrolagus colliei) was performed. In elasmobranchs, the magnocellular neurophysin cells formed a distinct preoptic nucleus, whereas in Hydrolagus the immunoreactive cells were scattered. Distinct parvicellular neurophysin cells were present in the preoptic nucleus. In Raja the nucleus "O" contained parvicellular Nps-immunoreactive neurons. The findings at the pituitary level point to the possibility that neurophysin neurons, in addition to releasing nonapeptides into the Systemic capillaries of the neural lobe, also participate in the regulation of the function of the rostral, medial and intermediate lobes of the adenohypophysis by a dual mechanism, i.e., a neurovascular pathway and a direct neural input. The extrahypophysial projections of the neurophysin neurons were highly developed to a degree not comparable to any other vertebrate group. The targets of these projections were located in the telencephalon, diencephalon and hindbrain. The evolutionary and functional implications of this phenomenon are discussed.
Patrick Meurling - One of the best experts on this subject based on the ideXlab platform.
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Hypophysial and extrahypophysial projections of the Neurosecretory System of cartilaginous fishes: an immunocytochemical study using a polyclonal antibody against dogfish neurophysin.
The Journal of Comparative Neurology, 1996Co-Authors: Patrick Meurling, Patricio Peña, Jesús M. Grondona, E M Rodriguez, Juan PerezAbstract:Immunocytochemistry using antibodies against the neurohypophysial nonapeptides has given equivocal results regarding relevant aspects of the classical Neurosecretory System of elasmobranchs. The lack of antibodies reacting with the elasmobranch neurophysins (Nps) has prevented the study of this Neurosecretory System by Nps immunocytochemistry. This led us to purify Nps from Scyliorhinus canicula, and to use them to raise a polyclonal antibody. This antibody reacted strongly with the elasmobranch neurophysin neurons, revealing their most delicate and distant hypophysial and extrahypophysial projections. A detailed mapping of the Neurosecretory System of five elasmobranch species (Etmopterus spinax, Squalus acanthias, Scyliorhinus canicula, Galeus melanostomus, Raja radiata) and one holocephalian species (Hydrolagus colliei) was performed. In elasmobranchs, the magnocellular neurophysin cells formed a distinct preoptic nucleus, whereas in Hydrolagus the immunoreactive cells were scattered. Distinct parvicellular neurophysin cells were present in the preoptic nucleus. In Raja the nucleus “O” contained parvicellular Nps-immunoreactive neurons. The findings at the pituitary level point to the possibility that neurophysin neurons, in addition to releasing nonapeptides into the Systemic capillaries of the neural lobe, also participate in the regulation of the function of the rostral, medial and intermediate lobes of the adenohypophysis by a dual mechanism, i.e., a neurovascular pathway and a direct neural input. The extrahypophysial projections of the neurophysin neurons were highly developed to a degree not comparable to any other vertebrate group. The targets of these projections were located in the telencephalon, diencephalon and hindbrain. The evolutionary and functional implications of this phenomenon are discussed. © 1996 Wiley-Liss, Inc.
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Hypophysial and extrahypophysial projections of the Neurosecretory System of cartilaginous fishes: an immunocytochemical study using a polyclonal antibody against dogfish neurophysin.
The Journal of comparative neurology, 1996Co-Authors: Patrick Meurling, Patricio Peña, Jesús M. Grondona, E M Rodriguez, Juan PerezAbstract:Immunocytochemistry using antibodies against the neurohypophysial nonapeptides has given equivocal results regarding relevant aspects of the classical Neurosecretory System of elasmobranchs. The lack of antibodies reacting with the elasmobranch neurophysins (Nps) has prevented the study of this Neurosecretory System by Nps immunocytochemistry. This led us to purify Nps from Scyliorhinus canicula, and to use them to raise a polyclonal antibody. This antibody reacted strongly with the elasmobranch neurophysin neurons, revealing their most delicate and distant hypophysial and extrahypophysial projections. A detailed mapping of the Neurosecretory System of five elasmobranch species (Etmopterus spinax, Squalus acanthias, Scyliorhinus canicula, Galeus melanostomus, Raja radiata) and one holocephalian species (Hydrolagus colliei) was performed. In elasmobranchs, the magnocellular neurophysin cells formed a distinct preoptic nucleus, whereas in Hydrolagus the immunoreactive cells were scattered. Distinct parvicellular neurophysin cells were present in the preoptic nucleus. In Raja the nucleus "O" contained parvicellular Nps-immunoreactive neurons. The findings at the pituitary level point to the possibility that neurophysin neurons, in addition to releasing nonapeptides into the Systemic capillaries of the neural lobe, also participate in the regulation of the function of the rostral, medial and intermediate lobes of the adenohypophysis by a dual mechanism, i.e., a neurovascular pathway and a direct neural input. The extrahypophysial projections of the neurophysin neurons were highly developed to a degree not comparable to any other vertebrate group. The targets of these projections were located in the telencephalon, diencephalon and hindbrain. The evolutionary and functional implications of this phenomenon are discussed.
Anita Gopesh - One of the best experts on this subject based on the ideXlab platform.
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Paraneuronal pseudobranchial Neurosecretory System in tank goby Glossogobius giuris with special reference to novel neurohaemal contact complex.
Respiratory physiology & neurobiology, 2020Co-Authors: Sonal Tripathi, Manvendra Sengar, Anita GopeshAbstract:Various putative oxygen chemosensory cells are reported to be present throughout the vertebrate body performing pivotal roles in respiration by initiating responses during acute hypoxia. Since air-breathing fishes often are exposed to the oxygen-deficient milieu, in such conditions various chemosensory cells operate in an orchestrated fashion. The Pseudobranchial Neurosecretory System (PSNS) a newly discovered System, is one of these. It has been placed in the category of "Diffuse NE Systems (DNES)". It is found in all the catfish species and in some other non-catfish group of teleosts. In catfishes, it is present in close association with the carotid labyrinth- a chemosensory structure, known in fish and amphibians. The presence of this System in Glossogobius giuris, in association with the pseudobranch, a structure considered to be precursor of carotid labyrinth, is a significant finding. In an attempt to study the structure and organization of the pseudobranchial Neurosecretory System in a non-catfish species of teleost, the present investigation was undertaken on a goby G. giuris. The histological observations, using a neurosecretion-specific stain, revealed the presence of this System in G. giuris. The findings are discussed in the light of the association of PSNS with pseudobranch and the type of "neurohaemal contact complex" formed between this Neurosecretory System and the elements of the circulatory System.
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Presence of Pseudobranchial Neurosecretory System in Barilius bendelisis: A Paraneuronal Neuroendocrine System
National Academy Science Letters, 2020Co-Authors: Sonal Tripathi, Manvendra Sengar, Anita GopeshAbstract:“Diffused neuroendocrine System (DNES)” includes a diversity of paraneuronal cells which are known to be scattered throughout the vertebrate body. They are well known to secrete a plethora of neurochemicals that act in autocrine and/or paracrine mode. Pseudobranchial Neurosecretory System is one such DNES. It is found uniformly in all the catfishes and some other groups of non-catfish teleosts. However, it was not found in carps so far. The present investigation is the first time report of the presence of this System in a carp Barilius bendelisis . In catfish, the System is present in association with carotid labyrinth—a chemosensory structure known in fish and amphibians. The carotid labyrinth is a derived structure of pseudobranch. Hence, the revelation of the pseudobranchial Neurosecretory System in association with pseudobranch in B. bendelisis has significant evolutionary implications.
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Presence of Pseudobranchial Neurosecretory System in Barilius bendelisis: A Paraneuronal Neuroendocrine System
National Academy Science Letters, 2020Co-Authors: Sonal Tripathi, Manvendra Sengar, Anita GopeshAbstract:“Diffused neuroendocrine System (DNES)” includes a diversity of paraneuronal cells which are known to be scattered throughout the vertebrate body. They are well known to secrete a plethora of neurochemicals that act in autocrine and/or paracrine mode. Pseudobranchial Neurosecretory System is one such DNES. It is found uniformly in all the catfishes and some other groups of non-catfish teleosts. However, it was not found in carps so far. The present investigation is the first time report of the presence of this System in a carp Barilius bendelisis . In catfish, the System is present in association with carotid labyrinth—a chemosensory structure known in fish and amphibians. The carotid labyrinth is a derived structure of pseudobranch. Hence, the revelation of the pseudobranchial Neurosecretory System in association with pseudobranch in B. bendelisis has significant evolutionary implications.
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Presence of paraneuronal pseudobranchial Neurosecretory System in the gill region of two air-breathing clupeids, Notopterus chitala and Notopterus notopterus.
Respiratory physiology & neurobiology, 2010Co-Authors: Anita Gopesh, Manvendra Sengar, S. TiwariAbstract: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.
Patricio Peña - One of the best experts on this subject based on the ideXlab platform.
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Hypophysial and extrahypophysial projections of the Neurosecretory System of cartilaginous fishes: an immunocytochemical study using a polyclonal antibody against dogfish neurophysin.
The Journal of Comparative Neurology, 1996Co-Authors: Patrick Meurling, Patricio Peña, Jesús M. Grondona, E M Rodriguez, Juan PerezAbstract:Immunocytochemistry using antibodies against the neurohypophysial nonapeptides has given equivocal results regarding relevant aspects of the classical Neurosecretory System of elasmobranchs. The lack of antibodies reacting with the elasmobranch neurophysins (Nps) has prevented the study of this Neurosecretory System by Nps immunocytochemistry. This led us to purify Nps from Scyliorhinus canicula, and to use them to raise a polyclonal antibody. This antibody reacted strongly with the elasmobranch neurophysin neurons, revealing their most delicate and distant hypophysial and extrahypophysial projections. A detailed mapping of the Neurosecretory System of five elasmobranch species (Etmopterus spinax, Squalus acanthias, Scyliorhinus canicula, Galeus melanostomus, Raja radiata) and one holocephalian species (Hydrolagus colliei) was performed. In elasmobranchs, the magnocellular neurophysin cells formed a distinct preoptic nucleus, whereas in Hydrolagus the immunoreactive cells were scattered. Distinct parvicellular neurophysin cells were present in the preoptic nucleus. In Raja the nucleus “O” contained parvicellular Nps-immunoreactive neurons. The findings at the pituitary level point to the possibility that neurophysin neurons, in addition to releasing nonapeptides into the Systemic capillaries of the neural lobe, also participate in the regulation of the function of the rostral, medial and intermediate lobes of the adenohypophysis by a dual mechanism, i.e., a neurovascular pathway and a direct neural input. The extrahypophysial projections of the neurophysin neurons were highly developed to a degree not comparable to any other vertebrate group. The targets of these projections were located in the telencephalon, diencephalon and hindbrain. The evolutionary and functional implications of this phenomenon are discussed. © 1996 Wiley-Liss, Inc.
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Hypophysial and extrahypophysial projections of the Neurosecretory System of cartilaginous fishes: an immunocytochemical study using a polyclonal antibody against dogfish neurophysin.
The Journal of comparative neurology, 1996Co-Authors: Patrick Meurling, Patricio Peña, Jesús M. Grondona, E M Rodriguez, Juan PerezAbstract:Immunocytochemistry using antibodies against the neurohypophysial nonapeptides has given equivocal results regarding relevant aspects of the classical Neurosecretory System of elasmobranchs. The lack of antibodies reacting with the elasmobranch neurophysins (Nps) has prevented the study of this Neurosecretory System by Nps immunocytochemistry. This led us to purify Nps from Scyliorhinus canicula, and to use them to raise a polyclonal antibody. This antibody reacted strongly with the elasmobranch neurophysin neurons, revealing their most delicate and distant hypophysial and extrahypophysial projections. A detailed mapping of the Neurosecretory System of five elasmobranch species (Etmopterus spinax, Squalus acanthias, Scyliorhinus canicula, Galeus melanostomus, Raja radiata) and one holocephalian species (Hydrolagus colliei) was performed. In elasmobranchs, the magnocellular neurophysin cells formed a distinct preoptic nucleus, whereas in Hydrolagus the immunoreactive cells were scattered. Distinct parvicellular neurophysin cells were present in the preoptic nucleus. In Raja the nucleus "O" contained parvicellular Nps-immunoreactive neurons. The findings at the pituitary level point to the possibility that neurophysin neurons, in addition to releasing nonapeptides into the Systemic capillaries of the neural lobe, also participate in the regulation of the function of the rostral, medial and intermediate lobes of the adenohypophysis by a dual mechanism, i.e., a neurovascular pathway and a direct neural input. The extrahypophysial projections of the neurophysin neurons were highly developed to a degree not comparable to any other vertebrate group. The targets of these projections were located in the telencephalon, diencephalon and hindbrain. The evolutionary and functional implications of this phenomenon are discussed.
Jesús M. Grondona - One of the best experts on this subject based on the ideXlab platform.
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Hypophysial and extrahypophysial projections of the Neurosecretory System of cartilaginous fishes: an immunocytochemical study using a polyclonal antibody against dogfish neurophysin.
The Journal of Comparative Neurology, 1996Co-Authors: Patrick Meurling, Patricio Peña, Jesús M. Grondona, E M Rodriguez, Juan PerezAbstract:Immunocytochemistry using antibodies against the neurohypophysial nonapeptides has given equivocal results regarding relevant aspects of the classical Neurosecretory System of elasmobranchs. The lack of antibodies reacting with the elasmobranch neurophysins (Nps) has prevented the study of this Neurosecretory System by Nps immunocytochemistry. This led us to purify Nps from Scyliorhinus canicula, and to use them to raise a polyclonal antibody. This antibody reacted strongly with the elasmobranch neurophysin neurons, revealing their most delicate and distant hypophysial and extrahypophysial projections. A detailed mapping of the Neurosecretory System of five elasmobranch species (Etmopterus spinax, Squalus acanthias, Scyliorhinus canicula, Galeus melanostomus, Raja radiata) and one holocephalian species (Hydrolagus colliei) was performed. In elasmobranchs, the magnocellular neurophysin cells formed a distinct preoptic nucleus, whereas in Hydrolagus the immunoreactive cells were scattered. Distinct parvicellular neurophysin cells were present in the preoptic nucleus. In Raja the nucleus “O” contained parvicellular Nps-immunoreactive neurons. The findings at the pituitary level point to the possibility that neurophysin neurons, in addition to releasing nonapeptides into the Systemic capillaries of the neural lobe, also participate in the regulation of the function of the rostral, medial and intermediate lobes of the adenohypophysis by a dual mechanism, i.e., a neurovascular pathway and a direct neural input. The extrahypophysial projections of the neurophysin neurons were highly developed to a degree not comparable to any other vertebrate group. The targets of these projections were located in the telencephalon, diencephalon and hindbrain. The evolutionary and functional implications of this phenomenon are discussed. © 1996 Wiley-Liss, Inc.
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Hypophysial and extrahypophysial projections of the Neurosecretory System of cartilaginous fishes: an immunocytochemical study using a polyclonal antibody against dogfish neurophysin.
The Journal of comparative neurology, 1996Co-Authors: Patrick Meurling, Patricio Peña, Jesús M. Grondona, E M Rodriguez, Juan PerezAbstract:Immunocytochemistry using antibodies against the neurohypophysial nonapeptides has given equivocal results regarding relevant aspects of the classical Neurosecretory System of elasmobranchs. The lack of antibodies reacting with the elasmobranch neurophysins (Nps) has prevented the study of this Neurosecretory System by Nps immunocytochemistry. This led us to purify Nps from Scyliorhinus canicula, and to use them to raise a polyclonal antibody. This antibody reacted strongly with the elasmobranch neurophysin neurons, revealing their most delicate and distant hypophysial and extrahypophysial projections. A detailed mapping of the Neurosecretory System of five elasmobranch species (Etmopterus spinax, Squalus acanthias, Scyliorhinus canicula, Galeus melanostomus, Raja radiata) and one holocephalian species (Hydrolagus colliei) was performed. In elasmobranchs, the magnocellular neurophysin cells formed a distinct preoptic nucleus, whereas in Hydrolagus the immunoreactive cells were scattered. Distinct parvicellular neurophysin cells were present in the preoptic nucleus. In Raja the nucleus "O" contained parvicellular Nps-immunoreactive neurons. The findings at the pituitary level point to the possibility that neurophysin neurons, in addition to releasing nonapeptides into the Systemic capillaries of the neural lobe, also participate in the regulation of the function of the rostral, medial and intermediate lobes of the adenohypophysis by a dual mechanism, i.e., a neurovascular pathway and a direct neural input. The extrahypophysial projections of the neurophysin neurons were highly developed to a degree not comparable to any other vertebrate group. The targets of these projections were located in the telencephalon, diencephalon and hindbrain. The evolutionary and functional implications of this phenomenon are discussed.