ISSN:
1432-0878
Schlagwort(e):
Blood-brain barrier
;
Moth
;
Diapause
;
ATPase
;
Peroxidase
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
,
Medizin
Notizen:
Summary Ultrastructural examination of diapause and nondiapause larval brains of the European corn borer disclosed anatomical differences that may be related to the insect's “blood-brain barrier.” The perineurial type I cells are quite closely appressed in the diapause brain, but thrown into extensive folds with large intercellular spaces in the nondiapause brain. The perineurial type II cells of diapause and nondiapause larvae are basically similar in general ultrastructure, and most likely form the basis for the “blood-brain barrier.” Horseradish peroxidase penetration studies indicated that the outer margin of the perineurial type II cells constitute the limits of infiltration into the brain. An enzymatic component of the “blood-brain barrier” is postulated in this insect. The localization of ATPase in the perineurial type II cells indicates that energy-requiring regulatory mechanisms may be localized here. Metabolic studies with isolated insect brains, coupled with recent evidence from mammalian systems, suggest that glial cells may be of importance in an enzymatic “blood-brain barrier.”
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00209349
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