Linked Life Data

9041363

Source:http://linkedlifedata.com/resource/pubmed/id/9041363

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1997-5-9
pubmed:abstractText
We have studied immunolocalization of activin receptors in the central nervous system using polyclonal antibodies (IgG) to type I (50-55 kDa, ActRI), type II (70-75 kDa, ActRII) or a subtype of type II known as type IIB (ActRIIB) receptors of activin. A total of 7 antisera to rat activin receptors was generated, i.e. 3 kinds of antisera to the extracellular domain (ActRI(81-89), ActRII(91-100), or ActRIIB(90-99)) and 4 antisera to the kinase domain (ActRI(323-333), ActRII(307-319), ActRII(407-420) or ActRIIB(306-319)). The region of aa 407-420 of ActRII is identical with that of ActRIIB. At first, we characterized these antibodies by Western blot analysis using ovarian proteins fractionated by preparative SDS-PAGE. All antibodies to ActRII and ActRIIB specifically reacted with 75 kDa-proteins which could also bind to activin-A. Anti-ActRII(91-100) antibody also reacted with 62 kDa-proteins which were capable of binding with activin-A. Although no positive reactions to anti-ActRI(81-89) antibody were seen in ovarian proteins, a positive reaction was detected at 52 kDa only when the proteins were deglycosylated. By use of these antibodies, immunolocalization of activin receptors was examined in the rat brain. The patterns of expression of activin type I and type II receptors were different. Positive reactions to anti-ActRII(91-100) antibody were detected in neurons of the cerebral cortex, hippocampus, medial amygdala and thalamus. In the hypothalamus, some neurons of the supraoptic nucleus were weakly stained, and widely scattered neurons of the lateral hypothalamic area were moderately stained. On the contrary, the most intense reactions to anti-ActRI(81-89) antibody were detected in neurons of the lateral hypothalamic area. In addition, many neurons of the cerebral cortex were also stained, but neurons of the hippocampus and the amygdala were not stained. These results suggest that activin may have physiological roles not only for hypothalamic neuroendocrinological and feeding-related systems as suggested previously but may also have functions in cortical and limbic pathways as a neuromodulator or for maintenance of neurons.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0953-8194
pubmed:author
pubmed:issnType
Print
pubmed:volume
9
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
105-11
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed-meshheading:9041363-Activin Receptors, pubmed-meshheading:9041363-Activin Receptors, Type I, pubmed-meshheading:9041363-Amino Acid Sequence, pubmed-meshheading:9041363-Amygdala, pubmed-meshheading:9041363-Animals, pubmed-meshheading:9041363-Antibodies, pubmed-meshheading:9041363-Antibody Specificity, pubmed-meshheading:9041363-Blotting, Western, pubmed-meshheading:9041363-Brain Chemistry, pubmed-meshheading:9041363-Cerebral Cortex, pubmed-meshheading:9041363-Female, pubmed-meshheading:9041363-Gonadotropins, Equine, pubmed-meshheading:9041363-Hippocampus, pubmed-meshheading:9041363-Humans, pubmed-meshheading:9041363-Hypothalamus, pubmed-meshheading:9041363-Immunohistochemistry, pubmed-meshheading:9041363-Ovary, pubmed-meshheading:9041363-Rats, pubmed-meshheading:9041363-Rats, Sprague-Dawley, pubmed-meshheading:9041363-Receptors, Growth Factor, pubmed-meshheading:9041363-Thalamus, pubmed-meshheading:9041363-Tissue Distribution
pubmed:year
1997
pubmed:articleTitle
Immunolocalization of type I or type II activin receptors in the rat brain.
pubmed:affiliation
Torii Nutrient-Stasis Project, ERATO, R & D Corporation of Japan, Yokohama.
pubmed:publicationType
Journal Article