EXAMINATION OF LIVING AND FIXED GAMETES AND EARLY EMBRYOS STAINED WITH SUPRAVITAL FLUOROCHROMES (HOECHST-33342 AND 3,3'-DIHEXYLOXACARBOCYANINE LODIDE)

被引:35
作者
LUTTMER, SJ
LONGO, FJ
机构
来源
GAMETE RESEARCH | 1986年 / 15卷 / 03期
关键词
D O I
10.1002/mrd.1120150308
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
We have examined living and fixed gametes and early embryos of surf clams, sea-urchins and hamsters stained with the supravital dyes Hoechst 33342 for DNA and 3,3''-dihexyloxacarbocyanine iodide (DIOC6) for mitochondria and endoplasmic reticulum. Hoechst staining (10 .mu.M) was confined exclusively to egg and sperm chromatin and, in living marine specimens, did not interfere with sperm motility, fertilization, or nuclear activity during meiosis or early embryogenesis. Altough Hoechst staining did not appear to affect the motility of hamster sperm, only zonae-free eggs inseminated. Because chromatin retained Hoechst 33342 stain during fertilization, the paternally and maternally derived chromosomes of living and fixed preparations fluoresced and their number, organization, and location within the zygote cytoplsm could be determined. Hence, polyspermy and other nuclear abnormalities were amenable to examination in these stained preparations. DIOC6 staining (8.7 .mu.M) was restricted primarily to the mitochondria of spermatozoa. Eggs stained with DIOC6 (0.87 to 8.7 .mu.M) were brightly fluorescent because of their size and the presence of large numbers of mitochondria and other DIOC6-positive organelles. Sea urchin and surf clam sperm stained with DIOC6 fertilized unstained eggs and the location of the incorporated sperm mitochondrion up to first cleavage was followed. Although hamster sperm stained with DIOC6 were less motile than unstained sperm, they were capable of inseminating only zonae-free eggs. These observations demonstrate that staining with supravital fluorochromes provides a rapid and useful method to analyze macromolecular and organelle changes in a variety of living and fixed gametes and embryos.
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页码:267 / 283
页数:17
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