Abstract：
:We used immunofluorescence microscopy and isoactin-specific antibodies to characterize the pattern and prevalence of pericytes within the brain microcirculation. Blood pressures of normotensive, Wistar-Kyoto (WKY) and spontaneously hypertensive (SHR) rats were measured prior to sacrifice and pressure-perfusion fixation. WKY and SHR brains were subdivided into ten major regions prior to ultracryomicrotomy. Sections 0.3-0.5 micron wide were treated with 10-40 micrograms/ml affinity-purified antibodies to the muscle and non-muscle actin isoforms. These localization studies show that there are four times the number of pericyte-rich capillaries in the SHR motor cortex compared to WKY counterparts (59.9 vs. 15.3%). In contrast, the sensory cortex of both rat strains is deficient in muscle actin staining surrounding the capillaries. The most striking difference in pericyte presence and muscle actin antibody staining between the SHR and WKY was observed in the tegmentum of the brainstem. There is nearly a one-to-one coincidence observed in pericyte and capillary profiles present within thin, frozen sections of the SHR midbrain. SHR pons capillaries were also pericyte-enriched. WKY analyses of plastic embedded thin sections confirmed the presence of pericytes and their filament-enriched processes encircling the capillaries of the hypertensive brains. These results suggest that pericytes may play important roles in hypertension and cerebrovascular disease processes.
journal_name
Tissue Celljournal_title
Tissue & cellauthors
Herman IM,Jacobson Sdoi
10.1016/0040-8166(88)90002-xsubject
Has Abstractpub_date
1988-01-01 00:00:00pages
1-12issue
1eissn
0040-8166issn
1532-3072pii
0040-8166(88)90002-Xjournal_volume
20pub_type
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