A Biological Model of Accelerated Senescence. 3.Histological Characteristics of Ag-Related Changes of Spermatogenic Epithelium in SAM (Senescence-Accelerated Mouse) Mice,статья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The data characterizing the age-related morphological changes in the spermatogenic epithelium of SAMP1 (senescence-accelareted prone)and SAMR1 (senescence-accelerated resistent) mice are presented. In many tubles, "early spermatogenesis" was accompanied by the formation of many morphologically abnormal germ cells on histological sections of the gonads of sexually immature (three-four weeks) mice of both strains. At this stage, destructive processes in the spermatogenic epithelium were more ptonounced in SAMR1 mice. In sexually mature (two-three month)SAMP1 and SAMR1 mice, spermatogenesis as whole proceeded normally. The first signs of regressive changes in the inner structure of most tubules (disintegration, detachment of spermatogenic epithelium from basal membrane) and morphology of germ cells (pycnosis, nuclear and cytoplasmic vakuolization) were found in SAMP1 mice at the age of six-seven months. In the older age groups (9-10 and 12-15 month), all types of spermatogenic cells were represented in both SAMP1 and SAMR1 mice, but most of these cells were atypical. Mitotic figures were recorded in population of highly differenteated Sertoli cells