title: [Progesterone transport across the wall of the rumen of sheep].
abstract: Data on content of fiber, lignin and progesterone in reticulo-ruminal chyme and progesterone in blood serum and saliva of sheep throughout the reproductive cycle and at intramuscular injection of progesterone, are presented. A direct correlation between concentration of progesterone in blood and chyme was revealed. 1.5% of progesterone entered the reticulo-rumen with saliva. Transport of hormone through the wall of forestomach is the main way of progesterone entering the reticulo-rumen. The transport is carried out against the gradient of hormone concentration. Possible participation of progesterone adsorption on lignin in explanation of this transport, is discussed.
authors.affiliation: Institute of Physiology, Komi Science Centre, Ural Division, Russian Acad. Sci., 167982, Syktyvkar, 50 Pervomaiskaya St., Russia.
authors.forename: M F
authors.initials: MF
authors.lastname: Borisenkov
authors.forename: M A
authors.initials: MA
authors.lastname: Vaĭkishnoraĭte
authors.forename: A M
authors.initials: AM
authors.lastname: Kaneva
mesh_terms: D000818:Animals; D001692:Biological Transport; D004043:Dietary Fiber / Q000032:analysis; D030762:Estrous Cycle; D005766:Gastrointestinal Contents; D007273:Injections, Intramuscular; D008031:Lignin / Q000032:analysis; D011374:Progesterone / Q000008:administration & dosage / Q000097:blood / Q000378:metabolism* / Q000493:pharmacokinetics*; D012417:Rumen / Q000737:chemistry / Q000378:metabolism*; D012463:Saliva / Q000737:chemistry; D034561:Sheep, Domestic / Q000378:metabolism*
chemical_list: D004043:Dietary Fiber; D011374:Progesterone; D008031:Lignin