�ber die Entwicklung des Enzymmusters in den neurosekretorischen hypothalamischen Zentren der Ratte

Pilgrim, Ch.

doi:10.1007/bf00304374

Cited by 35 publications

(2 citation statements)

References 46 publications

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“…Independ ently of us Pilgrim [40,41] and with quantitative histochemical methods Jongkind [28] reached similar conclusions working with white rats. Du chesne [20] also observed the intensification of the GBPDH reaction in thirsting mice.…”

Section: Discussionsupporting

confidence: 59%

Comparative Study of the Histoenzymological Properties of the Supraoptic and Paraventricular Nuclei and of Other Nuclear Regions of the Hypothalamus, the Epithalamus-Epiphysis Region and the Subfornical Organ

Bara¹,

Skaliczki²,

Ormos³

1971

Horm Res Paediatr

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In the hypothalamus of white rats ganglion cell groups can be observed which show enzyme histochemical properties (low SDH and CYO, moderate G₆PDH and TPND and marked LDH and MDH activity) similar to those of the supraoptic and paraventricular nuclei performing secretory function. These cell groups are the accessory magnocellular cell groups, those radiating from the paraventricular nucleus, all the cells of the nucleus tuberomamillaris as well as cells located in the area of the nucleus periventricularis arcuatus, cells situated inframamillarily and arranged peri- and parafornically in the infundibular plane. From the histoenzymological point of view several similar traits can be observed between these cell groups and the epiphysis as well as the special ependymal parts or organs of the third ventricle. On the basis of analogy it is conceivable that also the said cell groups of the hypothalamus perform secretory function.

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Section: Discussionsupporting

confidence: 59%

Comparative Study of the Histoenzymological Properties of the Supraoptic and Paraventricular Nuclei and of Other Nuclear Regions of the Hypothalamus, the Epithalamus-Epiphysis Region and the Subfornical Organ

Bara¹,

Skaliczki²,

Ormos³

1971

Horm Res Paediatr

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“…The tanycyte ependyma and processes contain unspecific esterases [4,9,10,20]. Of the enzymes examined by us, G6PD is an important enzyme of the pentose cycle.…”

Section: Discussionmentioning

confidence: 99%

Data on the Enzyme Histochemistry of the Ependyma Lining the Infundibular and Inframammillary Recesses of the Third Cerebral Ventricle, with Special Regard to the Connexions of the Tanycytes

Bara¹,

Z²

1974

Horm Res

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With enzyme histochemical methods, regional differences were observed regarding the connexions of the tanycyte processes and certain cytoplasmatic of the tanycytes reactions in the ependyma of the infundibular and infra-mammillary recesses of the albino rat. (1) According to the G„PD and TPND methods, the basal processes of the tanycyte ependyma exhibit a definite vascular contact only dorsally from the n. periventricularis arcuatus. Ependymal fibre endings can be seen in the region of the sulcus tuberoinfundibularis and in the inframammillary recess on the basal surface. Medially from the former, the tanycyte processes can be followed into the zona externa of the infundibulum. A convincing tissular connexion with the hypophysis portal system and with the cells of the pars infundibularis adenohypophyseos cannot be observed. (2) The TPPase activity usual in the secretory nervous system structures is missing from the tanycyte ependyma. The ependyma of the caudal end of the inframammillary recess exhibits isolated intense alkaline phosphatase activity. Rostrally from this, in the ependyma of the top of the inframammillary recess, there are more intense enzyme reactions than in the ciliated ependyma elsewhere lining the third ventricle.

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Development of the diencephalon in the rat. II. Correlation of the embryonic development of the hypothalamus with the time of origin of its neurons

Altman

Bayer

1978

J of Comparative Neurology

149

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The development of the nuclei of the hypothalamus was examined in normal and X-irradiated embryos from day 13 (E13) to the day before birth (E22). The diencephalic neuroepithelium was subdivided into three lobes (dorsal, medial, and ventral) and two lobules (superior and inferior). The hypothalamus is derived from the ventral lobe and the inferior lobule. The ventral neuroepithelial lobe generates the neurons of most of the early arising hypothalamic structures, including those of the lateral tier nuclei associated with the medial forebrain bundle, and the heterogeneous intermediate tier nuclei. A specialized neuroepithelial region lining the diamond shaped ventricle produces the early neurohypophysial magnocellular neurons; the neurons of the paraventricular nucleus remain at this site, whereas the neurons of the supraoptic nucleus could be traced migrating laterally. The neurons of the late arising hypophysiotropic area of the posterior hypothalamus are derived from components of the inferior neuroepithelial lobule: the dorsomedial and ventromedial nuclei apparently from a shared matrix in the main portion of the inferior lobule; the tuberomammillary-arcuate complex from its posteroventral recess. The triple-decked and sequentially produced components of the mammillary system may arise from separate neuroepithelial sites. The autoradiographic results of the previous study (Altman and Bayer, '78a) showed that the structural and functional heterogeneity of the mature hypothalamus is paralleled by cytogenetic heterochronicity; the present embryonic observations indicate that many of the distinguishable components of the hypothalamus arise from a mosaic of heterogeneous neuroepithelial sites.

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�ber die Entwicklung des Enzymmusters in den neurosekretorischen hypothalamischen Zentren der Ratte

Cited by 35 publications

References 46 publications

Comparative Study of the Histoenzymological Properties of the Supraoptic and Paraventricular Nuclei and of Other Nuclear Regions of the Hypothalamus, the Epithalamus-Epiphysis Region and the Subfornical Organ

Comparative Study of the Histoenzymological Properties of the Supraoptic and Paraventricular Nuclei and of Other Nuclear Regions of the Hypothalamus, the Epithalamus-Epiphysis Region and the Subfornical Organ

Data on the Enzyme Histochemistry of the Ependyma Lining the Infundibular and Inframammillary Recesses of the Third Cerebral Ventricle, with Special Regard to the Connexions of the Tanycytes

Development of the diencephalon in the rat. II. Correlation of the embryonic development of the hypothalamus with the time of origin of its neurons

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