| First Author | Sasaki R | Year | 1999 |
| Journal | Biol Reprod | Volume | 60 |
| Issue | 6 | Pages | 1410-8 |
| PubMed ID | 10330100 | Mgi Jnum | J:55299 |
| Mgi Id | MGI:1337691 | Doi | 10.1095/biolreprod60.6.1410 |
| Citation | Sasaki R, et al. (1999) Microelectrophoretic analysis of changes in protein expression patterns in mouse oocytes and preimplantation embryos. Biol Reprod 60(6):1410-8 |
| abstractText | One- and two-dimensional polyacrylamide microslab gel electrophoresis followed by silver staining was devised to visualize picogram to nanogram levels of proteins and was applied to the analysis of 1-20 mouse oocytes and embryos (approximately 16.5-330 ng of protein) during preimplantation development. Compared with values in embryos, more bands in the higher molecular weight range were found only for unfertilized oocytes in one-dimensional microelectrophoresis. A marked decrease in the number of protein spots occurred after fertilization in two-dimensional microelectrophoresis. Both findings indicate a decrease in maternal proteins caused by fertilization. Silver-staining densities were almost invariable for 8 major spots, but increased, decreased, or varied for 32 minor spots in developing embryos from the 1-cell to the morula stage, signifying spot-specific changes in the expression of zygotic proteins during development. The protein patterns in cumulus cells and blastocysts were different from those in oocytes and embryos. Even in a single 1-cell embryo, major spots and some minor spots were detectable by our two-dimensional microelectrophoretic technique, but many more minor spots were visualized in five 1-cell embryos, exemplifying the limit of our microelectrophoretic technique. As a preliminary result, a two-dimensional immunoblot pattern is shown for glucose transporter 1 expressed in morulae. |
