Ultrastructural characteristics of the thyroid C cells in the summer, autumn and winter states of the hedgehog (Erinaceus europaeus L.), with some reference to other mammalian species

Pearse, A. G. E.; Welsch, Ulrich

doi:10.1007/bf00336669

Cited by 60 publications

(6 citation statements)

References 20 publications

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“…Parafollicular cells are found in the thyroid tissues of most mammals and are abundant in thyroids of hibernating animals [Nonidez, 1932;Pearse, 1966;Azzali, 1968;Nunez et ah, 1967;Pearse and Welsch, 1968;Frink et ah, 1977], These cells have been shown to be the source of calcitonin [Copp et ah, 1967;Foster et ah, 1964;Matsuzawa and Kurosumi, 1967] and the site of formation and storage of certain amines [Ericscon, 1972;Nunez and Gershon, 1972]. Use of the peroxidase-antiperoxidase technique in the present study confirms the peculiar dis tribution of C cells in the opossum thyroid and demonstrates that these cells do indeed contain calcitonin in the opossum.…”

Section: Resultsmentioning

confidence: 99%

Postnatal Development of the Thyroid Gland in the Opossum (<i>Didelphis virginiana</i>)

Krause¹,

Cutts²

1983

Cells Tissues Organs

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Thyroid lobes of the newborn opossum consist of small epithelial cords or plates, the constitutent cells of which are joined by tight junctions and surround a minute lumen that courses throughout the length of each cord. Occasional cells, not directly associated with the lumina of the cords, show central nuclei and clusters of small electron-dense granules: these may represent parafollicular cells at an early state of development. By the end of the 1st week after birth, parafollicular cells are well established and appear as groups between the epithelial cords and as scattered individual cells within the cords. Growth of the thyroid occurs as the cords continue to elongate and branch. 11 days after birth, thyroid development in the opossum corresponds morphologically to that of eutherians just prior to birth. Primary follicles are present near the periphery of the thyroid lobes, having formed from evaginations of the epithelial cords. There is evidence of synthetic activity by the epithelial cells and colloid is present. Secondary follicles form as a result of evaginations from the epithelium of the primary follicles. At the end of the 2nd postnatal week, epithelial cords are no longer a prominent feature of the opossum thyroid, and the organ is now characterized by numerous, small colloid-filled follicles. As development progresses, the follicles increase in size and number and, by 35 days after birth, the thyroid shows adult features.

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Section: Resultsmentioning

confidence: 99%

Postnatal Development of the Thyroid Gland in the Opossum (<i>Didelphis virginiana</i>)

Krause¹,

Cutts²

1983

Cells Tissues Organs

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“…Un certain nombre de coupes d'estomac et d'intestin ont subi une impregnation argentique et Pazoroaction (Gabe, 1968). La roaction chromaffine de la medullo-surrenale a έΐέ renforce"e par un traitement PAPS (m^thode de Pearse, 1953) et au ferricyanure ferrique (technique de Adams, 1956). Outre les deux melhodes employees de fayon systematique, le testicule a ogalement £t£ color£ par I'homalun-oosine.…”

Section: Materiel Et Techniquesunclassified

Contribution À La Connaissance Du Cycle Annuel De La Chauve-Souris Rhinolophus Ferrumequinum (Schreber, 1774)

Girons¹,

Brosset²,

Girons³

1969

Mammalia

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Chez Rhinolophus ferrumequinum, des observations ocologiques, 1'atude histophysiologique des glandes endocrines, du tractus genital, du tube digestif et de la rate de 55 specimens autopsies aux difforentes saisons, ainsi que quelques dosages biochimiques, ne font apparaitre aucune difference systomatique entre l'otat des animaux vivant dans les grottes d'hivernage, d'octobre a mars, et celui qu'ils prosentent a d'autres opoques de l'anne*e. Sauf chez les femelles durant leur so jour dans les colonies maternelles, 1'hypothermie se manifeste en toutes saisons ; les pe"riodes d'activite sont cependant plus courtes et moins froquentes en hiver. L'hypothermie s'accompagne d'un certain nombre de caracteres (hypoglycomie, stockage de sang dans la rate, mise au repos des surranales) dont les traductions morphologiques sont d'autant plus accentu^es que cet £tat dure plus longtemps. Le Γένβϋ provoque se traduit par des modifications classiques (hyperglycemie, diminution du glycogene hopatique, de*pl£tion de la rate, disparition des produits de secretion figures dans les surrenales), sans doute accentuees par la contention. Ces caracUres sont tr£s attenuos chez les animaux roveilUs naturellement depuis un certain temps. Grace a des adaptations physiologiques (hypothermie reversible) et ocologique (recherche des micro-climats favorables), le Grand Rhinolophe r£duit au maximum ses depenses onergetiques. Les auteurs estiment que cette espece, et sans doute tous les Rhinolophidae et Vespertilionidae sont des homoothermes facultatifs, diffdrents aussi bien de Rongeurs et Insectivores hibernants que des homoothermes classiques ou des voritables honieothermes imparfaits. La plupart des etudes relatives Thibernation ont porte sur des Rongeurs (Marmotte, Spermophiles, Hamsters, Loir et Lerot) ou sur le Herisson. On est beaucoup moins bien renseigne sur la physiologie des Chauves-Souris qui constituent un mauvais materiel exporimental et sont tres difficiles a conserver en captivite dans des conditions normales. (*) Museum National d'Histoire Naturelle, Laboratoire d'Ecologie G^n^rale, 91 -Brunoy. Brought to you by | University of Arizona Authenticated Download Date | 7/11/15 9:45 PM Brought to you by | University of Arizona Authenticated Download Date | 7/11/15 9:45 PM Brought to you by | University of Arizona Authenticated Download Date | 7/11/15 9:45 PM Brought to you by | University of Arizona Authenticated Download Date | 7/11/15 9:45 PM Caubere , 1959). Dans les cavites souterraines de petites dimensions, les Rhinolophes hivernent isolement. Beaucoup de biotopes de ce type n'abritent qu'un seul individu. Nous avons observe une bonne trentaine de sujets, hivernants uniques de caves, chais, abris sous roche, etc... L'animal, toujours un adulte δ ce qu'il semble, se tient completement enveloppe dans ses membranes, accroche souvent a faible hauteur au-dessus du sol. La presence de ces isoles est breve et irreguliere. Un individu sejourne rarement plus de quelques jours, mais un nouveau venu peut le remplacer (donnees du baguage). U...

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“…For 5 of the 20 cells in the APUD series their neural crest origin, proposed by P earse [21,22], and by P earse and W elsch [28], is now completely proven. In the case of the remainder positive evidence for the same origin is available, from APUD-FIF studies, but the results have not yet been con firmed by the application of alternative techniques such as allografting.…”

Section: Significance O F the Neural Crest Origin O F A Pud Cellsmentioning

confidence: 99%

“…The allograft technique, on the other hand, has clearly shown that the ultimobranchial body C cells are of neural crest origin [16], This agrees w-ith the results of the application of the fourth method (APUD-FIF). Using this technique, Pearse and Polak [25] showed that earlier speculations [28] were correct in attributing the origin of the ultimo branchial and thyroid C cells to the neural crest. They indicated, furthermore, that not only the pharyngeal pouches were colonized by APUD cells from the neural crest but the whole foregut epithelium.…”

Section: Foregut Contributions O F the Neural Crestmentioning

confidence: 99%

Cell Migration and the Alimentary System: Endocrine Contributions of the Neural Crest to the Gut and its Derivatives

Pearse¹

1973

Digestion

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Evidence has been presented to show that, in all probability, the endocrine polypeptide (APUD) cells of Duodenumthe gut and its derivatives, especially the pancreas, are de rived from the neural crest. Setting aside, for the present, the truth or otherwise of this hypothesis, attempts have been made to estimate the mass of portions of the endocrine gut. It has been calculated that the volume of the endocrine stomach alone is greater than that of the pituitary gland. The consequences which arise from the concept of the gut as an endocrine organ are fully discussed.

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Ultrastructural characteristics of the thyroid C cells in the summer, autumn and winter states of the hedgehog (Erinaceus europaeus L.), with some reference to other mammalian species

Cited by 60 publications

References 20 publications

Postnatal Development of the Thyroid Gland in the Opossum (<i>Didelphis virginiana</i>)

Postnatal Development of the Thyroid Gland in the Opossum (<i>Didelphis virginiana</i>)

Contribution À La Connaissance Du Cycle Annuel De La Chauve-Souris Rhinolophus Ferrumequinum (Schreber, 1774)

Cell Migration and the Alimentary System: Endocrine Contributions of the Neural Crest to the Gut and its Derivatives

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