A demonstration of corticotropic activity and its distribution in the pars distalis of the reptile

Licht, Paul; Bradshaw, Don

doi:10.1016/0016-6480(69)90244-5

Cited by 57 publications

(2 citation statements)

References 15 publications

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“…1990|. In such habitats we can easily accomodate known effects of microclimate and microhabitat on Anolis biology, including temper ature and light |Lichl and Bradshaw, 1969;Licht. 1971: Pearson et al.…”

Section: Methodsmentioning

confidence: 99%

Central and Endocrine Aspects of Tongue-Flicking and Exploratory Behavior in <i>Anolis carolinensis</i>

Greenberg¹

1993

Brain Behav Evol

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Tongue-flicking in reptiles is frequently seen to increase in novel habitats and is presumed to involve the acquisition of chemical information. Like most behavioral patterns, however, tongue-flicking has both multiple causes and multiple functions, only some of which involve chemosensation. This paper describes units of exploratory behavior, including use of the tongue, in a microsmatic lizard, the green anole, Anolis carolinensis. This species employs its tongue in a manner suggestive of chemosensory exploration, but it possesses modest peripheral chemosensory organs and reduced central representation of chemosensory target cell groups. Further, specific elements of exploratory behavior are affected differently by treatments that involve altering levels of stress-sensitive hormones, androgen, and central catecholamines. Such differential responses suggest that exploratory behavior is an ensemble of individual units, some of which are selectively sensitive to specific physiological elements of the stress response and of elevated arousal.

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Section: Methodsmentioning

confidence: 99%

Central and Endocrine Aspects of Tongue-Flicking and Exploratory Behavior in <i>Anolis carolinensis</i>

Greenberg¹

1993

Brain Behav Evol

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“…Chez les Reptiles, les r h l t a t s de cette technique de coloration ne sont pas prk-cis& (Licht et Nicoll 1969) malgrk I'identification biologique d'hormone corticotrope dans la zone rostrale de I'hypophyse d'rlnolis carolinensis (Licht et Bradshaw 1969) I1 L'htmatoxyline au plomb colore-t-elle seulement les cellules corticotropes de la pars distalis?…”

Section: Reptiles Oiseaux Et Mammifzresunclassified

Coloration de l'hypophyse avec l'hématoxyline au plomb (H.Pb): Données nouvelles chez les Téléostéens et comparaison avec les résultats obtenus chez d'autres Vertébrés

Olivereau

1970

Acta Zoologica

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Résumé Nous avons préconisé (1964) la technique à l'hématoxyline au plomb (H.Pb) de MacConaill pour l'étude des cellules corticotropes des Téléostéens. Nous confirmons la validité de cette coloration chez la Tanche, le Poisson‐Chat et la Carpe soumise au jeûne, en fonction des réactions de l'interrénal. Divers auteurs ont étendu cette conclusion à d'autres espèces de Téléostéens, un Cyclostome et deux Amphibiens. La réaction est négative chez les Oiseaux; chez les Mammifères, la spécificité de cette technique n'a pas encore été vérifée. Chez quelques Téléostéens, Oiseaux et Mammifères, l'H.Pb semble également utile pour la mise en évidence des cellules sécrétant l'inter‐médine. Ces résultats conduisent Solcia et al. (1969) et Nouet et al. (1969) à proposer la technique de l'H.Pb pour la mise en évidence des cellules de la série APUD (Pearse 1969). Les données très fragmentaires obtenues jusqu'ici dans la série des Vertébrés doivent inciter à n'utiliser cette coloration signalétique qu'avec prudence. En effet, chez certaines espèces, les cellules LH‐ICSH se colorent intensément, et chez l'Anguille, les cellules à prolactine en état d'hypoactivité se chargent de fines granulations bleu noir. Il est donc indispensable de vérifier les fonctions corticotrope et mélanophorotrope des cellules éventuellement colorables par l'H.Pb par d'autres critères, topographiques chez les Téléostéens, morphologiques, tinctoriaux, mais surtout par une analyse expérimentale. Abstract In 1964, the lead‐haematoxylin technique (H.Pb) of MacConaill was introduced for the staining of the corticotrophic cells in various teleost species. Since then, the validity of this staining was corroborated in other teleost fishes (tench, catfish, carp after a longterm starvation), and probably also for a cyclostome and two amphibian species; however, this staining gives negative results in various birds and its specificity has not yet been confirmed in mammals. In some teleosts, birds and mammals, this technique is useful to demonstrate the melanocyte‐stimulating hormone secreting cells. According to these results, Solcia et al. (1969) and Nouet et al. (1969) suggest that this staining technique is generally suitable to identify the APUD cells (Pearse 1969). However, H.Pb is mostly a mere histological stain, although it demonstrates the carboxyl groups of proteins (Solcia et al.). Data collected in various vertebrates indicate that great caution is necessary when one wants to give a functional significance to this staining reaction. In some species (dog, Pyromelana) the LH‐ICSH cells are deeply stained with H.Pb. In the eel, an accumulation of fine blue black granules occurs when prolactin cells are hypoactive, as in sea water. It appears necessary to verify the function, either corticotrophic or melanophoric, of the H.Pb + cells of the pars distalis with other criteria: topography in teleosts, morphology, tinctorial reactions, but mainly with an experimental analysis, since two other cell types may eventually turn out to react with H.Pb.

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Hormonal dependence of tail regeneration in the lizard Anolis carolinensis

Licht

Howe

1969

J. Exp. Zool.

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Removal of the pars distalis several days before the amputation of the tail in Anolis carolinensis delays blastema formation and virtually abolishes tail regeneration. Hypophysectomy on, or several days after, tail amputation does not delay blastema formation but tail growth is largely abolished. If lizards are hypophysectomized after the blastema has formed and the tail has begun to elongate, the rate of tail regeneration is greatly reduced within a few days.Injection of a combination of adenohypophysial hormones (growth hormone, prolactin, gonadotropin, and thyrotmpin) restored tail regeneration to near normal levels in hypophysectomized lizards.A quantitative relationship was evident between the amount of pars distalis removed and the rate of tail regeneration. However, there was no apparent relationship between the region of the gland removed and regeneration, indicating that tail regeneration is probably dependent on a combination of several pituitary hormones.

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A demonstration of corticotropic activity and its distribution in the pars distalis of the reptile

Cited by 57 publications

References 15 publications

Central and Endocrine Aspects of Tongue-Flicking and Exploratory Behavior in <i>Anolis carolinensis</i>

Central and Endocrine Aspects of Tongue-Flicking and Exploratory Behavior in <i>Anolis carolinensis</i>

Coloration de l'hypophyse avec l'hématoxyline au plomb (H.Pb): Données nouvelles chez les Téléostéens et comparaison avec les résultats obtenus chez d'autres Vertébrés

Hormonal dependence of tail regeneration in the lizard Anolis carolinensis

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