title: Sensitive immunoassay for rat parvalbumin: tissue distribution and developmental changes.
abstract: A sensitive enzyme immunoassay for measurements of rat parvalbumin was established using antibodies raised in rabbits with parvalbumin purified from skeletal muscles. Antibodies in the antiserum were purified with a parvalbumin-coupled Sepharose column. The sandwich-type immunoassay system for parvalbumin was composed of polystyrene balls with immobilized purified antibodies and the same antibodies labeled with beta-D-galactosidase from Escherichia coli. The assay was highly sensitive and the minimum detection limit was 1 pg parvalbumin/tube. The assay did not cross-react with other calcium binding proteins, including human S-100a0 and S-100b proteins, rat 28-kDa calbindin-D, and bovine calmodulin. High concentrations of parvalbumin were observed in the skeletal muscles, especially in those composed of fast-twitch fibers, and in the diaphragm and tongue, but not in heart muscle. A relatively high concentration was estimated in the central nervous tissue. Parvalbumin was detected in the cerebral cortex and cerebellum of gestational 15-day fetuses. However, the levels of parvalbumin in the muscle tissues and central nervous tissue were very low in rats before 1 week of age. Thereafter, they increased sharply, reaching the adult levels by 5 weeks in most of the tissues. Parvalbumin concentrations in adult rat soleus muscle increased less than 20-fold within 10 days after transection of the ipsilateral sciatic nerve, while the concentrations in the extensor digitorum longus muscle did not change in the same period.
authors.affiliation: Department of Biochemistry, Institute for Developmental Research, Aichi Prefectural Colony, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Inaguma
authors.forename: N
authors.initials: N
authors.lastname: Kurobe
authors.forename: H
authors.initials: H
authors.lastname: Shinohara
authors.forename: K
authors.initials: K
authors.lastname: Kato
mesh_terms: D000818:Animals; D015153:Blotting, Western; D002490:Central Nervous System / Q000378:metabolism*; D003714:Denervation; D004591:Electrophoresis, Polyacrylamide Gel; D005260:Female; D007124:Immunoenzyme Techniques; D008297:Male; D009132:Muscles / Q000294:innervation / Q000378:metabolism*; D010320:Parvalbumins / Q000378:metabolism*; D051381:Rats; D011919:Rats, Inbred Strains
chemical_list: D010320:Parvalbumins