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Spermatogonial proliferation patterns in men with azoospermia of different etiologies.

Abstract：

OBJECTIVE:To demonstrate the pattern(s) of spermatogonial proliferation in different spermatogenic disorders. DESIGN:Retrospective case-control study. Teaching hospital. PATIENT(S):Azoospermic men who underwent testicular biopsy for sperm recovery and preparation for intracytoplasmic sperm injection. INTERVENTION(S):Testicular biopsy evaluation by quantitative immunohistochemistry for proliferating cell nuclear antigen (PCNA). MAIN OUTCOME MEASURE(S):The expression of PCNA in spermatogonia as an index of proliferating activity in testes with focal spermatogenesis, spermatocyte maturation arrest, or normal spermatogenesis. RESULT(S):In biopsies with focal spermatogenesis (11 men), there was a statistically significant reduction of PCNA-labeled spermatogonia in seminiferous tubules showing spermatocyte arrest compared with the expression in adjacent tubules with advanced spermatogenic stage or in normal spermatogenesis (obstructive azoospermia, six men). However, PCNA expression in tubules of the group with complete maturation arrest (six men) was significantly higher compared with the same spermatogenic defect-spermatocyte arrest-within focal spermatogenesis biopsies. CONCLUSION(S):Different causes underlie the spermatogenic disorders reported in this study. In focal spermatogenesis, the disorder is associated with the presence of mitotic inactive spermatogonia. The detection of normal active spermatogonia in the spermatocyte arrest group indicates that the spermatogenic defect, which is accompanied by meiosis impairment, is not related to a malfunction of spermatogonial proliferation.

journal_name

Fertil Steril

journal_title

Fertility and sterility

authors

Bar-Shira Maymon B,Yogev L,Yavetz H,Lifschitz-Mercer B,Schreiber L,Kleiman SE,Botchan A,Hauser R,Paz G

doi

10.1016/s0015-0282(03)02161-7

keywords:

subject

Has Abstract

pub_date

2003-11-01 00:00:00

pages

1175-80

issue

5

eissn

0015-0282

issn

1556-5653

pii

S0015028203021617

journal_volume

80

pub_type

杂志文章

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