Don d'ovocyte direct ou don croisé anonyme? L'expérience de l'Hôpital Erasme

SCOPUS: cp.jinfo:eu-repo/semantics/publishe

The expression of a small fraction of cellular genes is changed in response to histone hyperacetylation.

Posttranslational modifications of histones in chromatin are emerging as an important mechanism in the regulation of gene expression. Changes in histone acetylation levels occur during many nuclear processes such as replication, transcriptional silencing, and activation. Histone acetylation levels represent the result of a dynamic equilibrium between competing histone deacetylase(s) and histone acetylase(s). We have used two new specific inhibitors of histone deacetylase, trichostatin A (TSA) and trapoxin (TPX), to probe the effect of histone hyperacetylation on gene expression. We confirm that both drugs block histone deacetylase activity and have no detectable effects on histone acetylation rates in human lymphoid cell lines. Treatment with either TSA or TPX results in the transcriptional activation of HIV-1 gene expression in latently infected cell lines. In contrast, TSA and TPX cause a rapid decrease in c-myc gene expression and no change in the expression of the gene for glyceraldehyde-3-phosphate dehydrogenase (GAPDH). Using differential display to compare the differences in gene expression between untreated cells and cells treated with TSA, we found that the expression of approximately 2% of cellular genes (8 genes out of approximately 340 examined) changes in response to TSA treatment. These results demonstrate that the transcriptional regulation of a restricted set of cellular genes is uniquely sensitive to the degree of histone acetylation in chromatin.Journal ArticleResearch Support, Non-U.S. Gov'tResearch Support, U.S. Gov't, P.H.S.info:eu-repo/semantics/publishe

How to manage gametes and embryos from virus carrier couples ?

info:eu-repo/semantics/nonPublishe

Embryo-maternal interactive factors regulating the implantation process: implications in assisted reproductive.

The embryo-maternal dialogue that starts very early in the life of the embryo is crucial for its own implantation. A disturbance in this dialogue is the major reason for which 60% of all pregnancies are terminated at the end of the periimplantation period. Many studies have been performed to improve the understanding of the molecular mechanisms involved in this dialogue. Both partners, the mother and the embryo, are equally involved in this exchange of signals. Much progress has been done in understanding the role of (i) chorionic gonadotrophin, (ii) growth factors and cytokines, and (iii) steroid hormones and other mediators, produced either by the embryo, by the mother, or by both, during the peri-implantation period. Today it is clear that their production dictates changes in the endometrium, in the immunological system of the mother and in embryo metabolism, that enable the embryo to implant. Knowledge of the molecular mechanisms involved in the embryo-maternal interaction are reviewed in this article.Journal ArticleReviewinfo:eu-repo/semantics/publishe

Direct and anonymous oocyte donation: impact on clinical results

info:eu-repo/semantics/publishe

Assisted reproductive technologies as a cause of multiple gestation

info:eu-repo/semantics/publishe

Foetal maternal interaction factors regulating the implantation process: a review

info:eu-repo/semantics/nonPublishe

Fighting against Murphy’s law in A.R.T.

info:eu-repo/semantics/publishe

Chromatin is an integral component of HIV-1 transcriptional repression and activation

info:eu-repo/semantics/publishe

Alternative to transfer on day 2: What and when to transfer ?

info:eu-repo/semantics/publishe