Oxytocin plasma level in the lactating sows - effect of suckling

• Autorzy: Kotwica G. , Okrasa S.
• Języki publikacji: EN

Abstrakty

EN

Kotwica, G. and Okrasa, S.: Oxytocin plasma level in the lactating sows- effect of suckling. Acta physiol, poil., 1989, 40 (1): 104-110. Oxytocin concentration in the peripheral Iblood was measured toy RIA during suckling period in lactating sows (n = 8). Blood samples were ta'ken from the jugular vein around the clock for every 2 h on day 5, 10, 15, 20, 25, 30 and on day 35 of lactation. Besides that blood samples were collected more frequently during suckling periods. Oxytocin plasma concentration wias very low and in most cases it was on a border of sensitivity of our method (3pg/ml). Marked but short-lasting rise of oxytocin was observed only during a period of initial massage of the udders by the piglets. This rise observed in all studied pigs was higher (p < 0.01) compared to the values before the massage on the onset of lactation only, and was 14.6'± ±4.2 pg/ml and 6.4±1.2 pg/ml on day 5 and day 10 of lactation, respectively. to all other studied days in a few cases only suckling stimulated the release of oxytocin over its basic concentration. Mean values (±SEM) of oxytocin in hlood samples collected during massage of udder on day 15. 20, 25, 30 and day 35 were 3.7+0.5, 4.2±0.8, 4.9±1.1, 3.2 ±0,4 and 3.0 ± ±0.6 pg/ml plasma, respectively. There was no relationship between the size of the litters and neither basic level of oxytocin nor its blood concentration during suckling (r = 0.13).

• Wydawca: -
• Czasopismo: Acta Physiologica Polonica
• Rocznik: 1989
• Tom: 40
• Numer: 1
• Opis fizyczny: p.104-110,fig.,ref.

Twórcy

autor

Kotwica G.

• Institute of Animal Physiology, School of Agriculture and Technology, Olsztyn, Poland

autor

Okrasa S.

• Institute of Animal Physiology, School of Agriculture and Technology, Olsztyn, Poland

Bibliografia

• 1. Belin, V., Moss, F. (1986) Paired recordings from supraoptic and paraventricular oxytocin cells in suckled rats: recruitment and synchronization. J. Physiol. 377. 369-390.
• 2. Chard, T., Kitau, M. J., Landon, J. (1970) The development radioimmunoassay for oxytocin radioiodination, antibody production and separation techniques. J. Endocrinol. 46. 269-278.
• 3. Ellendorff, F., Forsling, M. L., Poulain, D. A. (1982) The milk ejection reflex in the pig. J. Physiol. 33. 577-594.
• 4. Ellendorff, F. (1984) The neurohypophyseal complex. 10th Inter. Congress Anim. Reprod. A. I. Urbana, IV, I-18-I-28.
• 5. Forsling, M. L., Taverne, M. A. M., Parvdzi, N., Ehsaesser, F., Smidt, W., Ellendorf , F. (1979) Plasma oxytocin and steroid concentration during late pregnancy, parturition and lactation in the miniature pig. J. Endocrinol. 82. 61-69.
• 6. Fraser, D. (1975) The nursing and suckling behaviour of pigs. IV. The effect of interrupting the suckling stimulus.Brit. Vet. J. 131. .549-559.
• 7. Fraser, D. (1977) Some behavioural aspects of milk ejection failure by sows. Brit. Vet. J. 133. 126-133.
• 8. Fraser, D. 01983/1984) The role of behaviour in swine production: a review of research. Appl. Anim. Ethol. 11. 317-339.
• 9. Fuchs, A. R., Cubile, L., Dawood, M. Y., Jorgensen, F. S. (1984) Release of oxytocin and prolactin by suckling in rabbits throughout lactation. Endocrinology 114. 462-469.
• 10. Gorewit, Z. C., McEntee, M. C., Wilson, D. B. (1980) Oxytocin in sera of lactating goats: relationship to other hormones released during milking. J. Dairy Sci. 63. Suppl. 1, 48.
• 11. Grosvenor, C..F., Shyr, S. W„ Goodman, G. T., Mena, F. (1986) Comparison of plasma profiles of oxytocin and prolactin following suckling in the rat. Neuro- endocrinology 43. 679-685.
• 12. Kotwica, J., Krzymowski, T., Dębek, J, (1978) Kaniulowanie naczyń żylnych u świń do badań endokrynologicznych. Med. Wet. 2. 118-120.
• 13. Kotwica, G., Dusza, L., Szafrańska, B., Ciereszko, R., Krzymowska, H., Doboszyńska, T., Zięcik, A., Kotwica, J. (1984) Wpływ egzogennej oksytocyny oraz łącznego podawania oksytocyny i prolaktyny na hormonalną czynność jajnika u macior po odsądzeniu prosiąt. Zesz. Probl. Post. Nauk Rol. 309. 133-142.
• 14. Martin, R., Voigt, K. V. (1981) Coexisterice of enkephalins with oxytocin andvasopressin in nerves of. rat neurohypophysis. Acta Endocrinol. Suppl. 240. 96. 49.
• 15. Rak, B., Kapelański, W., Tucholska, A. (1985) Obserwacje etologiczne loch karmiących. Materiały Ш Międzynarod. Koni. Problemy hodowli i chowu trzody chlewnej w gosp. wielkotowar. Olsztyn. Abstr. 14.
• 16. Schams, D., Schmidt-Polex, B., Kruse, V. (T979) Oxytocin determination by radioimmunoassay in cattle. Acta Endocrinol. 92. 258-270.
• 17. Schams, D., Mayer, H., Worstorff, H. (1983) Hormone und Melken. Der Tiersuchter 35. 137-144.
• 18. Tindal, J. ,S., Blake, L. A. (1980) A neural basis, for central inhibition of milk ejection in the rabbit, d. Endocrinol. 86. 525-631.
• 19. Uvnas-Moberg, K,, Stock, S., Eriksson, M., Laden, A., Einarsson, S., Kunavongkrit, A. (1985) Plasma levels of oxytocin increase in response to suckling and feeding in dogs and sows. Acta Physiol. Scand. 124. 391-398.
• 20. Wakerley, J. B., Lincoln, D. W. (1973) The milk ejection reflex of the rat: a 20-40- fold acceleration in the firring of paraventricular neurons during oxytocin release. J. Endocrinol. 57. 477-493.
• 21. Wakerley, J. B., Dyball, R. E. J, Lincoln, D. W. (1973) Milk ejection in the rat: the result of a selective release of oxytocin. J. Endocrinol. 57. 557-558.