title: Purification of class I medullipins from the venous effluent of isolated normal kidneys perfused under high pressure with saline.
abstract: Medullipin I (Med I) is a vasodepressor prohormone which is continuously elaborated into the renal venous effluent (RVE) of isolated rat kidneys perfused under high pressure. We have improved the yield of Med I by substituting saline for the albumin perfusate previously reported; and considerably improved refinement by directly fractionating the crude lipid extract of the RVE with high pressure liquid chromatography. The results show that Med I, as defined by previous physiologic and pharmacologic criteria, is not a single molecule. The 3 Class I medullipins described here are distinguished by subtle or overt differences in polarity and biologic activity.
authors.affiliation: Baptist Memorial Hospital, Memphis, TN.
authors.forename: B
authors.initials: B
authors.lastname: Brooks
authors.forename: L W
authors.initials: LW
authors.lastname: Byers
authors.forename: E E
authors.initials: EE
authors.lastname: Muirhead
authors.forename: M
authors.initials: M
authors.lastname: Muirhead
authors.forename: J A
authors.initials: JA
authors.lastname: Pitcock
authors.forename: K R
authors.initials: KR
authors.lastname: Maddipati
authors.forename: K M
authors.initials: KM
authors.lastname: Maxey
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D007668:Kidney / Q000098:blood supply / Q000378:metabolism*; D008055:Lipids / Q000097:blood* / Q000302:isolation & purification; D008297:Male; D010477:Perfusion; D011312:Pressure; D011817:Rabbits; D051381:Rats; D011918:Rats, Inbred SHR; D017208:Rats, Wistar; D012082:Renal Veins; D012965:Sodium Chloride
chemical_list: D008055:Lipids; C050534:medullipin I; D012965:Sodium Chloride