Nuclear and cytoplasmic maturation of mouse oocytes after treatment with synthetic meiosis-activating sterol in vitro

Hegele-Hartung C, Kuhnke J, Lessl M, Grondahl C, Ottesen J, Beier HM, Eisner S, Eichenlaub-Ritter U (1999)
BIOLOGY OF REPRODUCTION 61(5): 1362-1372.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
Synthetically produced meiosis-activating sterol, a sterol originally derived from follicular fluid (FF-MAS), induces meiotic maturation of mouse oocytes in vitro. We therefore compared FF-MAS-induced maturation of naked mouse oocytes arrested in prophase I by either hypoxanthine (Hx) or forskolin (Fo) with spontaneous maturation of naked oocytes. FF-MAS-treated oocytes overcame the meiotic block by Hx or Fo, although germinal vesicle breakdown was delayed by 11 h and 7 h, respectively. We also investigated the influence of FF-MAS on chromosome, microtubule, and ultrastructural dynamics in Hx-cultured oocytes by immunocytochemistry and electron microscopy. Similarly to spontaneously matured oocytes, chromosomes became aligned, a barrel-shaped spindle formed, and overall organelle distribution was normal in FF-MAS-matured oocytes. The number of small cytoplasmic asters was elevated in FF-MAS-treated oocytes. Although the number of cortical granules (CGs) was similar to that in spontaneously matured oocytes, the overall distance between CGs and oolemma was increased in the FF-MAS group. These observations suggest that the initiation of meiotic maturation in FF-MAS-treated oocytes in the presence of high cAMP levels leads to a delayed but otherwise normal nuclear maturation. FF-MAS appears to improve oocyte quality by supporting microtubule assembly and by delaying CG release, which is known to contribute to reduced fertilization.
Erscheinungsjahr
1999
Zeitschriftentitel
BIOLOGY OF REPRODUCTION
Band
61
Ausgabe
5
Seite(n)
1362-1372
ISSN
0006-3363
eISSN
1529-7268
Page URI
https://pub.uni-bielefeld.de/record/1621578

Zitieren

Hegele-Hartung C, Kuhnke J, Lessl M, et al. Nuclear and cytoplasmic maturation of mouse oocytes after treatment with synthetic meiosis-activating sterol in vitro. BIOLOGY OF REPRODUCTION. 1999;61(5):1362-1372.
Hegele-Hartung, C., Kuhnke, J., Lessl, M., Grondahl, C., Ottesen, J., Beier, H. M., Eisner, S., et al. (1999). Nuclear and cytoplasmic maturation of mouse oocytes after treatment with synthetic meiosis-activating sterol in vitro. BIOLOGY OF REPRODUCTION, 61(5), 1362-1372. doi:10.1095/biolreprod61.5.1362
Hegele-Hartung, C., Kuhnke, J., Lessl, M., Grondahl, C., Ottesen, J., Beier, H. M., Eisner, S., and Eichenlaub-Ritter, U. (1999). Nuclear and cytoplasmic maturation of mouse oocytes after treatment with synthetic meiosis-activating sterol in vitro. BIOLOGY OF REPRODUCTION 61, 1362-1372.
Hegele-Hartung, C., et al., 1999. Nuclear and cytoplasmic maturation of mouse oocytes after treatment with synthetic meiosis-activating sterol in vitro. BIOLOGY OF REPRODUCTION, 61(5), p 1362-1372.
C. Hegele-Hartung, et al., “Nuclear and cytoplasmic maturation of mouse oocytes after treatment with synthetic meiosis-activating sterol in vitro”, BIOLOGY OF REPRODUCTION, vol. 61, 1999, pp. 1362-1372.
Hegele-Hartung, C., Kuhnke, J., Lessl, M., Grondahl, C., Ottesen, J., Beier, H.M., Eisner, S., Eichenlaub-Ritter, U.: Nuclear and cytoplasmic maturation of mouse oocytes after treatment with synthetic meiosis-activating sterol in vitro. BIOLOGY OF REPRODUCTION. 61, 1362-1372 (1999).
Hegele-Hartung, C, Kuhnke, J, Lessl, M, Grondahl, C, Ottesen, J, Beier, HM, Eisner, S, and Eichenlaub-Ritter, Ursula. “Nuclear and cytoplasmic maturation of mouse oocytes after treatment with synthetic meiosis-activating sterol in vitro”. BIOLOGY OF REPRODUCTION 61.5 (1999): 1362-1372.

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