| First Author | Ikebuchi Y | Year | 1998 |
| Journal | Am J Physiol | Volume | 274 |
| Issue | 6 Pt 1 | Pages | C1496-500 |
| PubMed ID | 9696691 | Mgi Jnum | J:48166 |
| Mgi Id | MGI:1266901 | Doi | 10.1152/ajpcell.1998.274.6.C1496 |
| Citation | Ikebuchi Y, et al. (1998) SNAP-25 is essential for cortical granule exocytosis in mouse eggs. Am J Physiol 274(6 Pt 1):C1496-500 |
| abstractText | Synaptosome-associated protein of 25 kDa (SNAP-25) has been shown to play an important role in Ca2+-dependent exocytosis in neurons and endocrine cells. During fertilization, sperm-egg fusion induces cytosolic Ca2+ mobilization and subsequently Ca2+-dependent cortical granule (CG) exocytosis in eggs. However, it is not yet clear whether SNAP-25 is involved in this process. In this study, we determined the expression and function of SNAP-25 in mouse eggs. mRNA and SNAP-25 were detected in metaphase II (MII) mouse eggs by RT-PCR and immunoblot analysis, respectively. Next, to determine the function of SNAP-25, we evaluated the change in CG exocytosis with a membrane dye, tetramethylammonium-1,6-diphenyl-1,3,5-hexatriene, after microinjection of a botulinum neurotoxin A (BoNT/A), which selectively cleaves SNAP-25 in MII eggs. Sperm-induced CG exocytosis was significantly inhibited in the BoNT/A-treated eggs. The inhibition was attenuated by coinjection of SNAP-25. These results suggest that SNAP-25 may be involved in Ca2+- dependent CG exocytosis during fertilization in mouse eggs. |
