Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0019829 (Hodgkin's disease)
 30,247 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Self-organization of frequencies is studied by using model neurons called VCONs (voltage-controlled oscillator neuron models). These models give direct access to frequency information, in contrast to all-or-none neuron models, and they generate voltage spikes that phase-lock to oscillatory stimulation, similar to phase-locking of action potentials to oscillatory voltage stimulation observed in Hodgkin-Huxley preparations of squid axons. The rotation vector method is described and used to study how networks synchronize, even in the presence of noise or when damaged; the entropy of ratios of phases is used to construct an energy function that characterizes organized behavior. Computer simulations show that rotation numbers (output frequency/input frequency) describe both chaotic and nonchaotic behavior. Learning occurs when synaptic connections strengthen in response to stimulation that is synchronous with cell activity. It is shown that intermittent chaotic firing is suppressed and simple stable responses are enhanced by such learning in VCON networks. This analysis provides a rigorous basis for further investigation of the ideas of Wiener [Wiener, N. (1961) Cybernetics (MIT Press, Cambridge, MA), p. 191] on the origin of slow brain waves due to "the pulling together of frequencies."
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PMID:Intermittent chaos, self-organization, and learning from synchronous synaptic activity in model neuron networks. 271 6

Twenty-one patients with advanced-stage, intermediate- and high-grade non-Hodgkin's lymphomas were treated with alternating CHOP-MEVP chemotherapy. CHOP therapy consisted of CPA 650 mg/m2, ADM 45 mg/m2, VCR 1.4 mg/m2 and Pred 40 mg/m2 (po). MEVP therapy consisted of MIT 10 mg/m2 (iv) VDS 2 mg/m2 (iv) on day 1, etoposide 200 mg/m2 (po) on days 1-3, and Pred 40 mg/m2 (po) on days 1-5. Three courses of CHOP therapy and MEVP therapy were alternatively administered every three weeks. CR was achieved in 15 (71.4%) of 21 patients. Survival rate and relapse-free rate at 2 years for all 21 patients were 61.9% and 30.9%, respectively. Toxicity was generally tolerable except for CMV interstitial pneumonitis in a patient with IBL-like T-cell lymphoma and secondary leukemia in a patient with T-cell lymphoma. Chemotherapy of higher dose intensity is required to improve the relapse-free survival rate in these subsets of lymphoma.
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PMID:[Alternating CHOP-MEVP chemotherapy for advanced-stage, intermediate- and high-grade non-Hodgkin's lymphomas]. 823 84