FGF-2 immunoreactivity in adult rat ependyma and choroid plexus: Responses to global forebrain ischemia and intraventricular FGF-2

Fibroblast growth factor 2 (FGF-2) immunoreactivity (IR) was examined in the ependyma and choroid plexus (CP) of lateral and third ventricles in normal adult rats, as well as in response to transient forebrain ischemia (TFI) and exogenous FGF-2 delivered intraventricularlyfor several days by osmotic...

Full description

Saved in:
Bibliographic Details
Published in:Neurological research (New York) 2001-06, Vol.23 (4), p.353-358
Main Authors: Hayamizu, Terry F., Chan, Percy T., Johanson, Conrad E.
Format: Article
Language:English
Subjects:
Animals
Brain Ischemia - metabolism
cerebral ischemia
choroid plexus
Choroid Plexus - metabolism
ependyma
Ependyma - metabolism
FGF-2
Fibroblast growth factor
Fibroblast Growth Factor 2 - metabolism
Fibroblast Growth Factor 2 - pharmacology
Immunohistochemistry
Injections, Intraventricular
Male
Prosencephalon - blood supply
Rats
Rats, Sprague-Dawley
Third Ventricle - metabolism
Tissue Distribution
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Fibroblast growth factor 2 (FGF-2) immunoreactivity (IR) was examined in the ependyma and choroid plexus (CP) of lateral and third ventricles in normal adult rats, as well as in response to transient forebrain ischemia (TFI) and exogenous FGF-2 delivered intraventricularlyfor several days by osmotic pump. Similar patterns of FGF-2 IR were seen in the CP epithelia of both lateral and third ventricles, as well as in ependymal cells of the third ventricle and along lateral sides of the lateral ventricles. Consistent staining was seen along the apical aspect of epithelial cells facing the cerebrospinal fluid (CSF). Cytoplasmic staining was seen in the absence of ischemia, and was dramatically reduced in response to TFI. FGF-2 treatment followed by TFI resulted in sustained FGF-2 IR within CP and ependymal cells, supporting the idea that these tissues are involved in synthesis and secretion of growth factors into the CSF. In contrast, along the medial sides of the lateral ventricles, adjacent to brain structures such as the hippocampus, consistent staining was seen along the basal aspect of the ependymal cells. We propose that at least some regions of ependyma may function to transport molecules such as FGF-2 directly into the underlying brain parenchyma.
ISSN:0161-6412
1743-1328
DOI:10.1179/016164101101198550