Abstract:
:In the present study propidium iodide was used as a fluorescent dye to stain DNA of cells of hamster testicular origin and fluorescent intensities were analyzed by flow cytometry. We used hamster testicular cells from the first spermatogenic wave to observe the consecutive appearance of the different types of cells during puberty. At 12 days postpartum (dpp) diploid cells (including spermatogonia) predominated and some tetraploid cells were also present. Tetraploid spermatocytes increased dramatically by 21 dpp. The first haploid cells appeared at 21 dpp but substantial numbers were first present at 23 dpp. Immature haploid cells predominated at 32 dpp. Elongating condensing spermatids appeared at 34 dpp and spermatozoa began to leave the testis to enter the epididymidis at 36-38 dpp marking the end of the first round of spermatogenesis. Using acridine orange staining flow cytometry, chromatin condensation was followed by measuring fluorescence decrease from early round spermatids to spermatozoa obtained from the initial segment and from the cauda epididymides. The major portion of sperm chromatin condensation (88-90%) in the hamster occurred in the testis and only 10-12% occurred during epididymal sperm maturation. Spermatozoa in the initial segment of the epididymidis of the hamster contained a small amount of RNA that was no longer present in sperm of the cauda epididymidis, indicating that RNA was lost during epididymal sperm maturation in this species. Mol. Reprod. Dev. 55:205-211, 2000.
journal_name
Mol Reprod Devjournal_title
Molecular reproduction and developmentauthors
Golan R,Weissenberg R,Oschry Y,Shochat L,Lewin LMdoi
10.1002/(SICI)1098-2795(200002)55:2<205::AID-MRD10keywords:
subject
Has Abstractpub_date
2000-02-01 00:00:00pages
205-11issue
2eissn
1040-452Xissn
1098-2795pii
10.1002/(SICI)1098-2795(200002)55:2<205::AID-MRD10journal_volume
55pub_type
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