Abstract：
:A radioimmunoassay for orexin A has been developed. Anti-orexin A antiserum was raised in New Zealand white rabbits immunized with a conjugate of synthetic orexin A with bovine serum albumin. This antibody did not crossreact with orexin B, hypothalamic hormones, pituitary hormones, neuropeptides or gut hormones. Radioiodination of orexin A was performed with the chloramin T method, followed by purification of radioiodinated material on Sephadex G-25 column. Orexin A was extracted from tissues using acid-acetone. The assay was performed with a double antibody system. The dilution curve of acid-acetone-extracts of rat hypothalamus in the radioimmunoassay system was parallel to the standard curve. The recovery of tissue orexin A was about 80%,and the intra-assay and inter-assay variations were 5.2% and 7.8%, respectively. Orexin A was found in the hypothalamus, cerebrum and testis. These data suggest that this assay system is suitable for the measurement of tissue orexin A and that orexin A is found in the central nervous system and testis.
journal_name
Life Scijournal_title
Life sciencesauthors
Mitsuma T,Hirooka Y,Kayama M,Mori Y,Yokoi Y,Rhue N,Ping J,Izumi M,Ikai R,Adachi K,Nogimori Tdoi
10.1016/s0024-3205(99)00673-6subject
Has Abstractpub_date
2000-01-01 00:00:00pages
897-904issue
10eissn
0024-3205issn
1879-0631pii
S0024320599006736journal_volume
66pub_type
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