Przeciwpradowe przenikanie i zwrotny transport progesteronu, oksytocyny i prostaglandyny F2 alfa w obszarze wiezadla szerokiego macicy krow w czasie trwania fazy lutealnej

• Autorzy: Koziorowski M
• Języki publikacji: PL

Abstrakty

PL

W pracy przedstawiono wyniki badań własnych dotyczących przeciwprądowego przenikania z krwi żylnej i limfy do krwi tętniczej progesteronu, oksytocyny i prostaglandyny F2α w obszarze więzadła szerokiego macicy u krów będących w fazie lutealnej cyklu estralnego i na tym tle rozpatrzono znaczenie tego procesu w regulacji rozrodu u krowy. Progesteron wytwarzany przez ciałko żółte w czasie fazy lutealnej opuszcza jajnik z krwią żyły jajnikowej i limfą. W obszarze naczyń krezki jajnika (mesovarium) ulega przeciwprądowemu przenikaniu do krwi tętnicy jajnikowej. Powstaje zwiększona lokalna koncentracja progesteronu w tym obszarze, a przez gałąź maciczną tętnicy jajnikowej rów­nież w obszarze macicy i jajowodu. Sugeruje się, że tą drogą zwiększona lokalnie koncen­tracja progesteronu bierze udział w przygotowaniu macicy do spełnienia funkcji wydzielniczej, a szczególnie ma to znaczenie w sekrecji PGF2α. Wykazano również przeciwprądowe przenikanie i transport jajnikowej oksytocyny z krwi żylnej odpływającej z jajnika do krwi tętniczej zaopatrującej zarówno jajnik, jak i przez odgałęzienie tętnicy jajnikowej - macicę i jajowód. Sugeruje się, że lokalna koncentracja oksytocyny w obszarze macicy i jajowodu ma na celu zapoczątkowanie zmian, zarówno naczyniowych, jak i wydzielniczych, związanych ze zbliżającą się luteolizą. Wykazano przeciwprądowe, zwrotne przenikanie PGF2α z krwi żylnej do krwi tętniczej w obszarze krezki macicy (mesometrium), przy czym proces ten z większą intensywnością przebiegał po stronie ciałka żółtego. Proces ten ma za zadanie ochronę aktywnego ciałka żółtego przed luteolizą.

EN

The paper presents the results of own investigations concerning counter-current transfer of progesterone, oxytocin and prostaglandin F2α from venous blood and lymph to arterial blood in the area of broad ligament of uterus in the case of cows going through the luteal phase of estral cycle. The significance of the above-mentioned process in regulation of cow reproduction was examined. Progesterone produced by corpus luteum during the luteal phase leaves the ovary with ovarian vein blood and lymph. It is then subjected, in the area of mesovarium, to counter-current transfer to the blood of ovarian artery. It causes an increase in local concentration of progesterone both in this area and, through the uterine branch of ovarian artery, in those of uterus and oviduct. It may suggest that in this way the locally increased concen­tration of progesterone participates in the preparations of uterus to performing the func­tion of secretion, it is especially important in the case of PGF2α secretion. It was also shown that counter-current transfer and transport of ovarian oxytocin from venous blood, flowing from the ovary, to arterial blood supplying both the ovary and, through the branch of ovarian artery, the uterus and oviduct, takes place as well. It seems that the local concentration of oxytocin in the area of uterus and oviduct is aimed at starting some changes in vasculature and secretion, connected with approaching luteolysis. Counter-current back transfer of PGF2α from venous to arterial blood in the area of mesometrium was also observed. However, this process was more intensive on the side ipsilateral to corpus luteum. It is aimed at protection of active corpus luteum against luteolysis.

Słowa kluczowe

PL

fizjologia zwierzat; krowy; hormony; progesteron; oksytocyna; prostaglandyna F2 alfa; limfa; krew zylna; krew tetnicza; transport zwrotny; wiezadlo szerokie macicy; przenikanie przeciwpradowe; faza lutealna

EN

animal physiology; cow; hormone; progesterone; oxytocin; prostaglandin F2 alpha; lymph; venous blood; arterial blood; back transfer; broad ligament; uterus; counter-current transfer; luteal phase

• Wydawca: -
• Czasopismo: Acta Academiae Agriculturae ac Technicae Olstenensis. Veterinaria
• Rocznik: 1996
• Tom: 22,Suppl.G
• Opis fizyczny: s.1-43,fot.,rys.,tab.,bibliogr.

Twórcy

autor

Koziorowski M

• Akademia Rolniczo-Techniczna, Olsztyn

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