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Journal of Assisted Reproduction and Genetics

, Volume 24, Issue 9, pp 419–424 | Cite as

Effects of luteinizing hormone and follicle stimulating hormone on the developmental competence of porcine preantral follicle oocytes grown in vitro

  • Ji WuEmail author
  • Bo Xu
  • Wei Wang
Physiology

Abstract

Background

There has been controversy over the role of FSH in the regulation of preantral follicle development. LH is a survival and differentiation factor that increases oocyte maturation in FSH-supplemented cultures of mouse preantral follicles. However, little information exists on the action of LH and FSH in the developmental competence of porcine preantral follicle oocytes in vitro.

Materials and methods

Porcine preantral follicles were cultured for 3 days in the presence or absence of FSH or LH. Oocytes from these follicles were then matured, fertilized in vitro, and embryos were cultured. Estradiol secretion and histological analysis of cultured follicles were also carried out.

Results

FSH or combined LH and FSH significantly enhanced follicular growth compared to LH alone or the controls. Combined LH and FSH treatment of preantral follicles significantly increased the percentage (59 ± 5%) of oocytes competent to undergo cleavage to the two-cell stage after fertilization. A significant effect was seen on oocyte competence to develop from the two-cell to the blastocyst stage (30 ± 6%) compared to FSH alone treatment (45 ± 7 and 14 ± 5%, respectively). The amount of estradiol on days 2 and 3 of culture was significantly higher in follicles cultured with FSH (48.75 ± 17, 70.5 ± 14 pg/ml) or combined LH and FSH (63.25 ± 16, 72.5 ± 12 pg/ml) than that cultured with the untreated controls (16 ± 10, 5.66 ± 4 pg/ml).

Conclusions

The results indicated that FSH is essential for the in vitro growth of porcine preantral follicles, estradiol secretion, and for oocytes to acquire competence to resume meiosis and undergo fertilization and embryonic development. LH with FSH treatment of porcine preantral follicles can improve the quality of oocytes by promoting growth and a higher frequency of embryonic development.

Keywords

Developmental competence FSH Growth LH Porcine preantral follicles 

Notes

Acknowledgments

We thank the National Hormone and Pituitary Program, NIDOK, for its generous donation of FSH and LH. This work was supported and sponsored by the Shanghai Pujiang Program (to J.W.) and the Project for the Returned Overseas Chinese Scholars sponsored by the Scientific Research Foundation of the State Education Ministry (to J.W.).

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.School of Life Science and BiotechnologyShanghai Jiao Tong UniversityShanghaiChina
  2. 2.School of MedicineXiangnan UniversityHunanChina

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