The hypothalamo-hypophyseal system in Acipenseridae. XI. Morphological and immunohistochemical analysis of nonapeptidergic and corticoliberin-immunoreactive elements in hypophysectomized sterlet (Acipenser ruthenus L.).
Identifieur interne : 001810 ( Main/Exploration ); précédent : 001809; suivant : 001811The hypothalamo-hypophyseal system in Acipenseridae. XI. Morphological and immunohistochemical analysis of nonapeptidergic and corticoliberin-immunoreactive elements in hypophysectomized sterlet (Acipenser ruthenus L.).
Auteurs : A L Polenov [Russie] ; V V Kuzik ; O A DanilovaSource :
- General and comparative endocrinology [ 0016-6480 ] ; 1997.
English descriptors
- KwdEn :
- Animals, Corticotropin-Releasing Hormone (analysis), Female, Fishes, Hypophysectomy, Hypothalamus (chemistry), Hypothalamus (cytology), Hypothalamus (physiology), Immunohistochemistry, Male, Nerve Regeneration, Neuropeptides (analysis), Neurosecretory Systems (chemistry), Neurosecretory Systems (cytology), Pituitary Gland (chemistry), Pituitary Gland (cytology), Pituitary Gland (physiology).
- MESH :
- chemical , analysis : Corticotropin-Releasing Hormone, Neuropeptides.
- chemistry : Hypothalamus, Neurosecretory Systems, Pituitary Gland.
- cytology : Hypothalamus, Neurosecretory Systems, Pituitary Gland.
- physiology : Hypothalamus, Pituitary Gland.
- Animals, Female, Fishes, Hypophysectomy, Immunohistochemistry, Male, Nerve Regeneration.
Abstract
The regeneration of the hypothalamo-hypophyseal system (HHS) has been studied in the sterlet following hypophysectomy (HypoX). Significant portions of nonapeptide and corticoliberinergic (CRH) neurosecretory cells (NSCs) underwent degeneration. Surviving NSCs had a great regenerative ability; damaged axons formed anew, uncharacteristicly for intact fishes, axovasal and axoventricular contacts. There are some specific features of the reorganization of the ANHyp in sterlet after HypoX: (a) blood capillaries from the meninges penetrate deep into the wall of the infundibular recess and form unusual axovasal contacts; (b) "neurovascular regeneratory complexes" appear; (c) single CRH-immunoreactive axons grow into the meninges. Morphological data show progressive appearance of dendroventricular contacts in the preoptic nucleus, formation of new axoventricular and axovasal contacts, and activation of surviving NSCs after HypoX. An ability to recognize HHS to release neurohormones into the CSF and bloodstream is suggested.
PubMed: 9073493
Affiliations:
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XI. Morphological and immunohistochemical analysis of nonapeptidergic and corticoliberin-immunoreactive elements in hypophysectomized sterlet (Acipenser ruthenus L.).</title><author><name sortKey="Polenov, A L" sort="Polenov, A L" uniqKey="Polenov A" first="A L" last="Polenov">A L Polenov</name><affiliation wicri:level="1"><nlm:affiliation>Laboratory of Neuroendocrinology, Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, Saint-Petersburg, Russia.</nlm:affiliation><country xml:lang="fr">Russie</country><wicri:regionArea>Laboratory of Neuroendocrinology, Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, Saint-Petersburg</wicri:regionArea><wicri:noRegion>Saint-Petersburg</wicri:noRegion></affiliation></author><author><name sortKey="Kuzik, V V" sort="Kuzik, V V" uniqKey="Kuzik V" first="V V" last="Kuzik">V V Kuzik</name></author><author><name sortKey="Danilova, O A" sort="Danilova, O A" uniqKey="Danilova O" first="O A" last="Danilova">O A Danilova</name></author></analytic><series><title level="j">General and comparative endocrinology</title><idno type="ISSN">0016-6480</idno><imprint><date when="1997" type="published">1997</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term><term>Corticotropin-Releasing Hormone (analysis)</term><term>Female</term><term>Fishes</term><term>Hypophysectomy</term><term>Hypothalamus (chemistry)</term><term>Hypothalamus (cytology)</term><term>Hypothalamus (physiology)</term><term>Immunohistochemistry</term><term>Male</term><term>Nerve Regeneration</term><term>Neuropeptides (analysis)</term><term>Neurosecretory Systems (chemistry)</term><term>Neurosecretory Systems (cytology)</term><term>Pituitary Gland (chemistry)</term><term>Pituitary Gland (cytology)</term><term>Pituitary Gland (physiology)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Corticotropin-Releasing Hormone</term><term>Neuropeptides</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Hypothalamus</term><term>Neurosecretory Systems</term><term>Pituitary Gland</term></keywords><keywords scheme="MESH" qualifier="cytology" xml:lang="en"><term>Hypothalamus</term><term>Neurosecretory Systems</term><term>Pituitary Gland</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Hypothalamus</term><term>Pituitary Gland</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Female</term><term>Fishes</term><term>Hypophysectomy</term><term>Immunohistochemistry</term><term>Male</term><term>Nerve Regeneration</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The regeneration of the hypothalamo-hypophyseal system (HHS) has been studied in the sterlet following hypophysectomy (HypoX). Significant portions of nonapeptide and corticoliberinergic (CRH) neurosecretory cells (NSCs) underwent degeneration. Surviving NSCs had a great regenerative ability; damaged axons formed anew, uncharacteristicly for intact fishes, axovasal and axoventricular contacts. There are some specific features of the reorganization of the ANHyp in sterlet after HypoX: (a) blood capillaries from the meninges penetrate deep into the wall of the infundibular recess and form unusual axovasal contacts; (b) "neurovascular regeneratory complexes" appear; (c) single CRH-immunoreactive axons grow into the meninges. Morphological data show progressive appearance of dendroventricular contacts in the preoptic nucleus, formation of new axoventricular and axovasal contacts, and activation of surviving NSCs after HypoX. An ability to recognize HHS to release neurohormones into the CSF and bloodstream is suggested.</div></front></TEI><affiliations><list><country><li>Russie</li></country></list><tree><noCountry><name sortKey="Danilova, O A" sort="Danilova, O A" uniqKey="Danilova O" first="O A" last="Danilova">O A Danilova</name><name sortKey="Kuzik, V V" sort="Kuzik, V V" uniqKey="Kuzik V" first="V V" last="Kuzik">V V Kuzik</name></noCountry><country name="Russie"><noRegion><name sortKey="Polenov, A L" sort="Polenov, A L" uniqKey="Polenov A" first="A L" last="Polenov">A L Polenov</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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