Microtubule organization in porcine oocytes during fertilization and parthenogenesis

Nam Hyung Kim, Calvin Simerly, Hiroaki Funahashi, Gerald Schatten, Billy N. Day

Research output: Contribution to journalArticle

90 Citations (Scopus)

Abstract

Microtubule configurations in porcine oocytes after sperm penetration or after artificial activation by electrical stimulation were imaged by immunocytochemistry and laser scanning confocal microscopy. Soon after sperm penetration, an aster was seen adjacent to the incorporated sperm head. Polyspermic penetrations led to the presence of multiple sperm asters in association with each sperm. The sperm aster enlarged and, at the time of pronuclear apposition, filled the cytoplasm. After male and female gamete union, the microtubule matrix was reduced. At the mitotic metaphase stage, microtubules were detected in the spindle, which was anastral and fusiform. At anaphase, asters assembled at each spindle pole, and at telophase, large asters filled the cytoplasm. Artificial activation by electrical stimulation induced in the cytoplasm a dense network of microtubules, which seem to be involved in proper positioning of the female pronucleus. At mitotic metaphase, microtubules were concentrated around the chromatin. The results of experiments using taxol, a microtubule stabilizing agent, suggest that maternal centrosomal material is present in the mature porcine oocyte as dispersed undetectable material that can form a microtubule network after parthenogenetic activation. However, at fertilization, the paternal centrosome collects centrosomal material to form a sperm aster. These results suggest that the functional centrosome that forms during fertilization is a result of the blending of paternal and maternal centrosomal components.

Original languageEnglish
Pages (from-to)1397-1404
Number of pages8
JournalBiology of Reproduction
Volume54
Issue number6
Publication statusPublished - Jun 1996
Externally publishedYes

Fingerprint

Parthenogenesis
Fertilization
Microtubules
Oocytes
Swine
Spermatozoa
Sperm-Ovum Interactions
Centrosome
Cytoplasm
Metaphase
Electric Stimulation
Mothers
Spindle Poles
Telophase
Sperm Head
Anaphase
Excipients
Paclitaxel
Germ Cells
Confocal Microscopy

ASJC Scopus subject areas

  • Cell Biology
  • Developmental Biology
  • Embryology

Cite this

Kim, N. H., Simerly, C., Funahashi, H., Schatten, G., & Day, B. N. (1996). Microtubule organization in porcine oocytes during fertilization and parthenogenesis. Biology of Reproduction, 54(6), 1397-1404.

Microtubule organization in porcine oocytes during fertilization and parthenogenesis. / Kim, Nam Hyung; Simerly, Calvin; Funahashi, Hiroaki; Schatten, Gerald; Day, Billy N.

In: Biology of Reproduction, Vol. 54, No. 6, 06.1996, p. 1397-1404.

Research output: Contribution to journalArticle

Kim, NH, Simerly, C, Funahashi, H, Schatten, G & Day, BN 1996, 'Microtubule organization in porcine oocytes during fertilization and parthenogenesis', Biology of Reproduction, vol. 54, no. 6, pp. 1397-1404.
Kim, Nam Hyung ; Simerly, Calvin ; Funahashi, Hiroaki ; Schatten, Gerald ; Day, Billy N. / Microtubule organization in porcine oocytes during fertilization and parthenogenesis. In: Biology of Reproduction. 1996 ; Vol. 54, No. 6. pp. 1397-1404.
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