Abstract:
:The present study continues a previous investigation on the median eminence (EM) (Krisch et al., 1978). In rats with high levels of neurohormones (LHRH, vasopressin) a limited immunohistochemical labeling of perivascular tanycyte processes can be observed surrounding capillaries in the marginal region of the organum vasculosum laminae terminalis (OVLT) and in the inner part of the subfornical organ (SFO). This labeling extends from the perivascular space a short distance along the tanycyte processes. By conventional electron microscopy and by freeze-etching, tight junctions are demonstrated at a distance from the capillary lumen which corresponds to the borderline of the immunohistochemical labeling of perivascular tanycyte processes in light microscopic preparations. The tight junctions are arranged in several parallel and helical rows and correspond to those found in the median eminence. Consequently, the immunohistochemical labeling the OVLT and in the SFO marks the intercellular cleft. In the circumventricular organs the immunostaining labels the extension of the perivascular space characterized by the hemal milieu. The perivascular space is separated off by tight junctions from the CSF-milieu of the adjacent neuropil. Furthermore, the present study demonstrates tight junctions in the marginal region of the area postrema (AP) between the perivascular processes of the tanycytes.
journal_name
Cell Tissue Resjournal_title
Cell and tissue researchauthors
Krisch B,Leonhardt H,Buchheim Wdoi
10.1007/BF00233891subject
Has Abstractpub_date
1978-12-29 00:00:00pages
485-97issue
3eissn
0302-766Xissn
1432-0878journal_volume
195pub_type
杂志文章abstract::The startle is a relatively simple ubiquitous reflex. Interestingly, it has a "non-zero baseline", i.e., its magnitude can be reduced or enhanced. We reflect here on the translational value of prepulse inhibition and fear-related potentiation as endophenotypes that can be used for the investigation of complex psychiat...
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