Biomedical subjects
Publications and source records attributed to M Hurwitz.
An overview of molecular biology is presented for the practicing surgeon. Definitions of the constructs and activity of DNA, RNA, and protein synthesis are defined. These principles are illustrated in their use in recombinant DNA technologies. A glossary is provided for the terms utilized.
DNA is the fundamental guide for the cell's processes. The alterations in DNA that can lead to abnormal or absent proteins and the role of chromosomal alterations in changing the function of the DNA are reviewed. The role of viruses in derailing a cell's normal functions, the major mechanisms of oncogene action, and tumor suppressor genes are also discussed.
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We have cloned a gene (BCY1) from the yeast Saccharomyces cerevisiae that encodes a regulatory subunit of the cyclic AMP-dependent protein kinase. The encoded protein has a structural organization similar to that of the RI and RII regulatory subunits of the mammalian cyclic AMP-dependent protein kinase. Strains of S. cerevisiae with disrupted BCY1 genes do not display a cyclic AMP-dependent protein kinase in vitro, fail to grow on many carbon sources, and are exquisitely sensitive to heat shock and starvation.
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Six patients with Hodgkin's disease who failed MOPP (mechlorethamine, vincristine, prednisone, and procarbazine) chemotherapy, with recurrences confined to lymph node areas, are reported. All patients were treated with tumoricidal doses of irradiation in mantle, inverted Y, or whole-abdominal fields. All six patients achieved complete remission, with minimal toxicity. Disease-free survival ranged from 3 to 38 months, with four patients remaining in complete remission at 9, 15, 27, and 38 months. Radiation therapy should be considered in patients failing MOPP chemotherapy with lymph node disease.
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