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Biomedical subjects

R B Kelly

Publications and source records attributed to R B Kelly.

At least 163 records · Page 9Linked to original sources
PubMed1972

Binding of -bungarotoxin to acetylcholine receptors in mammalian muscle (snake venom-denervated muscle-neonatal muscle-rat diaphragm-SDS-polyacrylamide gel electrophoresis).

Experiments were performed to determine the specificity of [(125)I]alpha-bungarotoxin binding to skeletal muscle. In adult rat diaphragm, [(125)I]alpha-bungarotoxin was found to bind almost exclusively to those regions of the muscle that contain endplates and are known to be sensitive to acetylcholine. In contrast, chronically denervated adult muscle and muscle from neonatal rats, both of which are sensitive along their entire lengths, bound substantial amounts of toxin in all regions. Toxin binding to all muscles was inhibited by d-tubocurarine and by carbamylcholine, but not by atropine. The bound [(125)I]toxin was solubilized by homogenization of the tissue in 1% Triton X-100 and was recovered as a single band, distinct from free toxin, after zone sedimentation. Treatment of the solubilized, toxin-bound complex with 2-mercaptoethanol and sodium dodecyl sulfate resulted in the recovery of free toxin. A toxin-bound complex was also obtained when toxin was incubated directly with extracts of muscle endplate regions prepared by homogenization in Triton X-100. No such complex was observed with extracts prepared from muscle lacking endplates. These results are consistent with the interpretation that alpha-bungarotoxin binds specifically to the acetylcholine receptor of mammalian skeletal muscle.

Acrylamides↗
PubMedDate not supplied

Clinical practice guidelines on depression: awareness, attitudes, and content knowledge among family physicians in New York.

BACKGROUND: In 1989, the federal government mandated that the Agency for Health Care Policy and Research (AHCPR) appoint expert panels to develop clinical practice guidelines to define standards for the provision and quality of health care. There is uncertainty about physicians' awareness and attitudes concerning guidelines. METHODS: We surveyed 992 members of the New York State Academy of Family Physicians. In addition to demographic data, respondents were questioned about awareness of AHCPR guidelines for depression in primary care, urinary incontinence, and pressure ulcers in adults; knowledge of the diagnosis and treatment of depression; and general attitudes about guidelines. RESULTS: Three mailings produced a response rate of 53.2%. While 90.5% of respondents treat depression in their primary care practices, only 33.6% are aware of the existence of the guidelines on depression 1 year after publication. Only 13.1% of respondents have a copy of the guidelines. Physicians are slightly less aware of the guidelines on urinary incontinence and pressure ulcers (30.0%). Respondents are generally knowledgeable about the diagnosis and treatment of depression, and board certification is correlated with increased knowledge about the treatment of recurrent depression. Logistic regression analyses demonstrate that female family physicians, those living in larger communities, and physicians with 3 or more years of training are most likely to have positive attitudes toward guidelines. CONCLUSIONS: The AHCPR guidelines failed to reach their targeted audience. Specific strategies derived from survey data can identify physicians who may most benefit from educational interventions.

Adult↗