نتایج جستجو برای: h3 thymidine
تعداد نتایج: 27962 فیلتر نتایج به سال:
We previously introduced the concept that intrahepatic bile duct epithelial cells, or cholangiocytes, are functionally heterogeneous. This concept is based on the observation that secretin receptor (SR) gene expression and secretin-induced cAMP synthesis are present in cholangiocytes derived from large (>15 μm in diameter) but not small (<15 μm in diameter) bile ducts. In work reported here, we...
By STEPHEN H. ROBINSON, GEORGE BRECHER, IRA S. LoumE AND JAMES E. P ROLONGED SURVIVAL of a significant fraction of small lymphocytes was suggested by Ottesen and by Hamilton.12 Their findings at first seemed incompatible with the observation that lymphocytes leave the thoracic duct at a rate sufficient to replace all circulating forms within hours.3 However, continuous recirculation of lymphocy...
This study investigates whether insulin (a differentiation factor for lens epithelial cells) acts as a survival factor. In the absence of insulin, 6-day embryonic chicken lens epithelial explants undergo apoptosis as shown by changes in cell morphology, DNA fragmentation, and loss of trypan blue exclusion. Insulin inhibits these changes and promotes survival of the cells. Aurintricarboxylic aci...
Background: Thymidine phosphorylase (TP) catalyses the conversion of thymidine into thymine. Mitochondrial neurogastrointestinal encephalomyopathy (MNGIE) is an autosomal recessive disease which is caused by mutations in the nuclear gene encoding TP, bringing about severe impairment of TP-enzyme specific activity and accumulation of thymidine in plasma. The clinical manifestations of MNGIE are ...
An improved method has been developed for the preparation of autoradiographs for electron optical study. The refinement lies principally in the routine production of uniformly thin layers of photographic emulsion over the tracer-labeled cell sections. This is accomplished by means of a centrifugal spreading mechanism. Maize root tips grown in the presence of H3-thymidine were examined electron ...
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