Monomeric and Oligomeric Compounds as Contraceptives and Endocrine Therapeutics

The options for male contraceptives are limited. Research is ongoing to develop a male contraceptive based on hormonal activity. Testosterone is one of the hormones necessary in producing sperm.  Testosterone is absolutely required as a hormone for male fertility. Derivatives of testosterone for male contraceptives currently in clinical trials are associated with estrogenic deficiency. This deficiency can cause several issues including, but not limited to, bone density loss, risk of obesity, cardiovascular disease, and/or ineffective carbohydrate or lipid metabolism. 

CXCR4 Reduction Leads to Enhancement of Engraftment of Hematopoietic Stem Cells

Methods of enhancing engraftment of donor hematopoietic stem cells (HSCs) by reducing expression or activity of CXCR4 in HSCs is described. HSC are the only cells in the bone marrow that are both pluripotent and long lived. Bone marrow transplantation (BMT) using HSC is an increasingly common medical therapy for severe hematologic cancers and primary hematologic immunodeficiencies. However, for significant HSC engraftment to occur there must usually be pre-transplant conditioning with either irradiation or chemotherapy or both.
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