Chromatin remodelling initiation during human spermiogenesis
| العنوان: | Chromatin remodelling initiation during human spermiogenesis |
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| المؤلفون: | Liliana Ramos, Peter Boer, Marieke de Vries, Zjwan Housein |
| المصدر: | Biology Open Biology Open, Vol 1, Iss 5, Pp 446-457 (2012) Biology Open, 1, 446-57 Biology Open, 1, 5, pp. 446-57 |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | Genetics, biology, Spermatid, Spermiogenesis, QH301-705.5, Science, Chromatin remodelling, Protamine, General Biochemistry, Genetics and Molecular Biology, Cell biology, Chromatin, Human Reproduction [NCEBP 12], Histone, medicine.anatomical_structure, Perinuclear theca, biology.protein, medicine, Nucleosome, Biology (General), General Agricultural and Biological Sciences, Acrosome, Research Article, Human |
| الوصف: | Contains fulltext : 110544.pdf (Publisher’s version ) (Open Access) During the last phase of spermatogenesis, spermiogenesis, haploid round spermatids metamorphose towards spermatozoa. Extensive cytoplasmic reduction and chromatin remodelling together allow a dramatic decrease of cellular, notably nuclear volume. DNA packing by a nucleosome based chromatin structure is largely replaced by a protamine based one. At the cytoplasmic level among others the acrosome and perinuclear theca (PNT) are formed. In this study we describe the onset of chromatin remodelling to occur concomitantly with acrosome and PNT development. In spread human round spermatid nuclei, we show development of a DAPI-intense doughnut-like structure co-localizing with the acrosomal sac and sub acrosomal PNT. At this structure we observe the first gradual decrease of nucleosomes and several histones. Histone post-translational modifications linked to chromatin remodelling such as H4K8ac and H4K16ac also delineate the doughnut, that is furthermore marked by H3K9me2. During the capping phase of acrosome development, the size of the doughnut-like chromatin domain increases, and this area often is marked by uniform nucleosome loss and the first appearance of transition protein 2 and protamine 1. In the acrosome phase at nuclear elongation, chromatin remodelling follows the downward movement of the marginal ring of the acrosome. Our results indicate that acrosome development and chromatin remodelling are interacting processes. In the discussion we relate chromatin remodelling to the available data on the nuclear envelope and the linker of nucleoskeleton and cytoskeleton (LINC) complex of spermatids, suggesting a signalling route for triggering chromatin remodelling. |
| وصف الملف: | application/pdf |
| تدمد: | 2046-6390 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::847c3f4b2be3b6ddd86d77a6e3b25d1e https://pubmed.ncbi.nlm.nih.gov/23213436 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....847c3f4b2be3b6ddd86d77a6e3b25d1e |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20466390 |
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