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The effects of mono-2-ethylhexyl phathalate, adriamycin and N-ethyl-N-nitrosourea on stage-specific apoptosis and DNA synthesis in the mouse spermatogenesis.

Abstract：

:Tubule segments from defined stages of the mouse seminiferous epithelium were incubated for 4, 8 and 24 h in the presence of different concentrations of mono-2-ethylhexyl phthalate (MEHP), adriamycin, and N-ethyl-N-nitrosourea (ENU) to study the effects of these chemicals on germ cell apoptosis and DNA synthesis. Apoptosis was measured by using the in situ end-labeling (ISEL) technique and microscopic analysis of apoptotic cells, and DNA synthesis was assessed by 3H-thymidine incorporation. In the mouse testis after 8 h incubation, MEHP increased the number of apoptotic cells significantly at 0.01 and 0.1 mM concentrations in stages IX-XI of the mouse seminiferous cycle. Adriamycin increased the number of apoptotic cells significantly at 0.1 and 1.0 microM concentrations in stages IX-XI. In tubules from stages IX-XI cultured in the presence on 0.01 and 0.1 mM ENU the number of apoptotic cells was increased significantly. In dose-response experiments trend of decreasing amount of DNA synthesis was observed, but no statistical differences were found. MEHP, adriamycin and ENU increased the amount of apoptotic cells in model where transillumination assisted microdissection was combined to ISEL. We conclude that ISEL technique provides a useful method to study the stage-specific effects of chemicals on spermatogenesis.

journal_name

Toxicol Lett

journal_title

Toxicology letters

authors

Suominen JS,Linderborg J,Nikula H,Hakovirta H,Parvinen M,Toppari J

doi

10.1016/s0378-4274(03)00170-x

keywords:

subject

Has Abstract

pub_date

2003-07-20 00:00:00

pages

163-73

issue

2

eissn

0378-4274

issn

1879-3169

pii

S037842740300170X

journal_volume

143

pub_type

杂志文章

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