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Abstract
Mature male rats were treated with gossypol for 8 weeks. Afterwards, treatment was
halted to allow the arrested spermatogonia to revive. Fifteen days after the withdrawal
of the drug treatment, the re-populating pachytene spermatocyte (RPS) had a lower
level of core histone H3 and H4 acetylation (40 and 55% reduction, respectively) than that of the control pachytene
spermatocyte (CPS). The reduction in core histone acetylation was found in histone
H3 and H4 but not in H2A and H2B. Forty-five days after the withdrawal of the drug treatment, the inhibitory effect
on core histone acetylation was recovered. Both dot-blot and standard liquid assays
were used to detect the nuclear histone acetylase activity in RPS and CPS. Fifteen
days after the withdrawal of gossypol treatment, the acetylase type A activity in
RPS was reduced by 42% when compared to CPS. It has been concluded that after gossypol
treatment, the activity for nucleosomal core histones acetylation was selectively
inhibited. This effect is related to an inhibitory effect on the histone acetylase
activity.
Keywords
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Article info
Publication history
Accepted:
June 25,
1993
Received:
September 24,
1992
Identification
Copyright
© 1993 Published by Elsevier Inc.