Concentrations of oestrogens in blood plasma and seminal plasma of boars during the postpuberal period

• Autorzy: Zdunczyk S. , Janowski T. , Ras A. , Baranski W.
• Języki publikacji: EN

Abstrakty

EN

Concentrations of oestrogens in the blood plasma and seminal plasma of mature boars are high. However, little is known about their concentrations after reaching sexual maturity. The aim of this study was to determine the concentration of oestrogens in blood plasma and seminal plasma of boars during the postpuberal period. Free and conjugated oestrone and oestradiol-17β were determined by radioimmunoassay in blood from the testicular vein and artery, and peripheral circulation as well as in seminal plasma collected from 18 Polish Landrace boars. The animals were divided into three groups (n = 6) according to age (8, 12 and 16 months, respectively). Oestrone was predominant free and conjugated oestrogen. The highest values of oestrogens were measured in the testicular vein (p ≤ 0.05). The concentrations of oestrogens in seminal plasma did not differ from those found in the peripheral circulation. An age-dependent increase in levels of all four oestrogens (p ≤ 0.05) was observed. This can be associated with biochemical maturation of the reproductive system during the postpuberal period.

• Wydawca: -
• Czasopismo: Polish Journal of Veterinary Sciences
• Rocznik: 2011
• Tom: 14
• Numer: 4
• Opis fizyczny: p.539-544,fig.,ref.

Twórcy

autor

Zdunczyk S.

• Department of Animal Reproduction with Clinic, Faculty of Veterinary Medicine, University of Warmia and Mazury, Oczapowskiego 14, 10-719 Olsztyn, Poland

autor

Janowski T.

autor

Ras A.

autor

Baranski W.

Bibliografia

• Berger T, McCarthy M, Pearl CA, At-Taras E, Roser JF, Conley A (2008) Reducing endogenous estrogens during the neonatal and juvenile periods affects reproductive tract development and sperm production in postpuberal boars. Anim Reprod Sci 109: 218-235.
• Booth WD (1980) A study of some major testicular steroids in the pig in relation to their effect on the development of male characteristics in the prepubertally castrated boar. J Reprod Fertil 59: 155-162.
• Cameron RDA (1987) Sexual development and semen production in boars. Pig News Inf 8: 389-392.
• Claus R, Hoffmann B (1980) Oestrogens, compared to other steroids of testicular origin in blood plasma of boars. Acta Endocrinol (Copenh) 94: 404-411.
• Claus R, Schopper D, Wagner HG (1983) Seasonal effect on steroids in blood plasma and seminal plasma of boars. J Steroid Biochem 19: 725-729.
• Claus R, Schopper D, Hoang-Vu C (1985) Contribution of individual compartments of the genital tract to oestrogen and testosterone concentrations in ejaculates of the boar. Acta Endocrinol (Copenh) 109: 281-288.
• Claus R, Hoang-Vu C, Ellendorff F, Meyer HD, Schopper D, Weiler U (1987) Seminal oestrogens in the boar: origin and functions in the sow. J Steroid Biochem 27: 331-335.
• Claus R (1990) Physiological role of seminal components in the reproductive tract of the female pig. J Reprod Fertil Suppl 40: 117-131.
• Hess RA, Carnes K (2004) The role of estrogen in testis and male reproductive tract: a review and species comparison. Anim Reprod 1: 5-30.
• Hoffmann B, Gentz F, Failing K (1996) Investigations intothe course of progesterone-, oestrogen- and eCG-concentrations during normal and impaired pregnancy in the mare. Reprod Domest Anim 31: 717-723.
• Hoffmann B, Goes de Pinho T, Schuler G (1997) Determination of free and conjugated oestrogens in peripheral blood plasma, feces and urine of cattle throughout pregnancy. Exp Clin Endocrinol Diabetes 105: 296-303.
• Hoffmann B, Rostalski A, Mutembei H.M, Goericke-Pesch S (2010) Testicular steroid hormone secretion in the boar and expression of testicular and epididymal steroid sulphatase and estrogen sulphotransferase activity. Exp Clin Endocrinol Diabetes 118: 274-280.
• Kowalowka M, Wysocki P, Fraser L, Strzeżek J (2008) Extracellular superoxide dismutase of boar seminal plasma. Reprod Domest Anim 43: 490-496.
• Koziorowska-Gilun M (2009) Charakterystyka systemów antyoksydacyjnych układu rozrodczego knura. Doctoral thesis, University of Warmia and Mazury in Olsztyn, Poland.
• Rostalski A (2005) Untersuchungen zur testikularen Steroidhormonproduktion beim Eber und der Aktivitat der Enzyme Östrogensulfotransferase und Arylsulfatase in Hoden und Nebenhoden. VVB Verlag, Wettenberg. Doctoral thesis, J. Liebig University in Giessen, Germany.
• Strzeżek J, Fraser L, Lecewicz M (2000) Biochemical indices of semen as a marker of the development of boar reproductive function. ESDAR Newsletter 5: 56.
• Strzeżek J, Saiz-Cidoncha F, Wysocki P, Tyszkiewicz A, Jastrzębski M (2002) Seminal plasma proteins as markers of biological value of boar semen. Anim Sci Pap Rep 20: 255-266.
• Szafrańska B, Zięcik A, Okrasa S (2002) Primary antisera against selected steroids or proteins and secondary antisera against gamma-globulins-an available tool for studies of reproductive processes. Reprod Biol 2: 187-204.
• Tabędzka-Łonczyńska A (2010) Sezonowe zmiany zwrotnego i docelowego transferu hormonów steroidowych w naczyniach narządów rozrodczych samca świni domowej. Doctoral thesis, University of Warmia and Mazury in Olsztyn, Poland.
• Waberski D, Soares JAG, Bandeira de Arruda E, Weitze K (1996) Effects of a transcervical infusion of seminal plasma prior to insemination on the fertilising competence of low numbers of boar spermatozoa at controlled AI-ovulation intervals. Anim Reprod Sci 44: 165-173.
• Weiler U, Claus R (1991) Endocrine aspects of testicular function, especially hormones in the seminal plasma and their fate in the female reproductive tract: testicular steroids and their relevance for male and female reproductive functions. Reprod Domest Anim Suppl 1: 41-61.
• Zduńczyk S, Janowski T (2009) Role of oestrogens in the regulation of reproductive tract functions in the boar (Polish). Med Weter 65: 505-507.