title: Immunoreactive atrial natriuretic peptide in the guinea pig spleen.
abstract: The presence of immunoreactive ANP precursor-like material in the guinea pig spleen is suggested. This is based on the following experimental evidence: An acidic extract of guinea pig spleen analysed by Sephadex G-50 gelfiltration contained 4.6 pmol/g wet tissue immunoreactive atrial natriuretic peptide (IR-ANP), coeluting with the 15 kDa synthetic ANP (2-126). Gelfiltrated IR-ANP material was further submitted to reverse phase high performance liquid chromatography and monitored by radioimmunoassay employing two antisera. One antiserum recognizes the C-terminal of ANP (1-126), the second is directed against the N-terminal sequence. Both antisera revealed material eluting with synthetic ANP (2-126). Furthermore, immunohistochemical analysis suggests this ANP-like material to be localized mainly at the periphery of the white pulp of the spleen. These findings link ANP with the immune system.
authors.affiliation: Institute of Pharmacology, Toxicology and Pharmacy, University of Munich, FRG.
authors.forename: A M
authors.initials: AM
authors.lastname: Vollmar
authors.forename: A
authors.initials: A
authors.lastname: Friedrich
authors.forename: R
authors.initials: R
authors.lastname: Schulz
mesh_terms: D000818:Animals; D009320:Atrial Natriuretic Factor / Q000032:analysis* / Q000276:immunology; D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid; D006168:Guinea Pigs; D006801:Humans; D007124:Immunoenzyme Techniques; D011863:Radioimmunoassay; D051381:Rats; D013154:Spleen / Q000032:analysis* / Q000276:immunology
chemical_list: D009320:Atrial Natriuretic Factor