Frequency and Occurrence of Late-Gestation Losses from Cattle Cloned Embryos

Developmental Competence and Pluripotency Gene Expression of Cattle Cloned Embryos Derived from Donor Cells Treated with 5-aza-2'-deoxycytidine

Mouse embryos cloned from brain tumors.

Cancer cells escape from growth control by accumulating genetic and epigenetic alterations. In rare instances, epigenetic changes alone are oncogenic. Furthermore, agents that modify DNA methylation or chromatin structure can restore a normal phenotype to cells harboring oncogenic mutations. However, it is unclear to what extent epigenetic reprogramming can reverse oncogenesis. Using somatic nu...

Cloned cattle controversy

The US Food and Drug Agency could be ruling as soon as next month on draft guidelines for the sale of barnyard clones of cattle and their products: milk, meat and offspring. The regulators are likely to bow to pressure from farmers and the agro-cloning lobby to drop the voluntary moratorium on the sale of genetic material from clones. The new guidelines are widely expected to be liberal, openin...

synthesis of sulfides from alcohols and thiols in solvent-freeconditions and deoxygenation of sulfoxides

کاتالیست یک سنتز جدید برای تیواترها توصیف شده است. واکنش الکل ها با آریل، هتروآریل و آلکیل تیو ل ها درحضور 1،3،5- تری آزو- 2،4،6- تری فسفرین-2،2،4،4،6،6 هگزاکلراید ((tapc به عنوان یک کاتالیست موُثر، بازده های خوب تا عالی از تیواترها را حاصل می کند. علاوه براین، واکنش تحت شرایط بدون فلز و بدون حلال پیش می رود، بنابراین یک مکمل جالب برای روش های شناخته شده سنتز تیواترها ارائه می دهد. یک مکانیسم ا...

Developmental Competence and Pluripotency Gene Expression of Cattle Cloned Embryos Derived from Donor Cells Treated with 5-aza-2'-deoxycytidine

BACKGROUND Reconstructed embryos from terminally differentiated somatic cells have revealed high levels of genomic methylation which results in inappropriate expression patterns of imprinted and non-imprinted genes. These aberrant expressions are probably responsible for different abnormalities during the development of clones. Improvement in cloning competency may be achieved through modificat...