Sperm nuclear histone H2B: correlation with sperm DNA denaturation and DNA stainability
Article first published online: 11 NOV 2008
© 2008, Asian Journal of Andrology, SIMM and SJTU.
Asian Journal of Andrology
Volume 10, Issue 6, pages 865–871, November 2008
How to Cite
Zini, A., Zhang, X. and Gabriel, M. S. (2008), Sperm nuclear histone H2B: correlation with sperm DNA denaturation and DNA stainability. Asian Journal of Andrology, 10: 865–871. doi: 10.1111/j.1745-7262.2008.00415.x
- Issue published online: 11 NOV 2008
- Article first published online: 11 NOV 2008
- Received 2007-12-01 Accepted 2008-03-28
- sperm DNA;
- male infertility;
- DNA fragmentation
Aim: To examine the relationship between sperm DNA damage and sperm nuclear histone (H2B) staining. Methods: We evaluated sperm samples from 14 consecutive asthenoteratozoospermic infertile men and six consecutive fertile controls. Sperm nuclear histone (H2B) staining and sperm chromatin integrity (assessed by sperm chromatin structure assay and expressed using the percentage of (i) DNA fragmentation index [%DFI] and (ii) high DNA stainability [%HDS)]) were evaluated. Results: Histone H2B immunocytochemistry demonstrated two nuclear staining patterns: (i) focal punctate staining; and (ii) diffuse staining. Infertile men had a higher mean percentage of spermatozoa exhibiting diffuse H2B staining than did fertile men (7.7%± 4.6%vs. 1.6%± 1.2%, respectively, P < 0.01). We observed significant relationships between the proportion of spermatozoa with diffuse nuclear histone staining and both sperm %DFI (r= 0.63, P < 0.01) and sperm %HDS (r= 0.63, P < 0.01). Conclusion: The data demonstrate that infertile men have a higher proportion of spermatozoa with diffuse histone H2B than do fertile men and suggest that sperm DNA damage might, at least in part, be due to abnormally high histone H2B levels.