Transient conductance changes induced by pressure in artificial lipidic membranes.
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Biomedical subjects
Publications and source records attributed to M Parisi.
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Ultrathin lipidic membranes containing one ten-thousandth of a special proteolipid from electric organ of Electrophorus reacted to the addition of acetylcholine by a rapid and transient increase in conductance. Such a change was not induced by choline and is greatly reduced by a previous application of d-tubocurarine. These properties, resembling those from chemically excitable membranes, were not observed with another proteolipid from the same tissue.
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The efficacy of different therapeutic regimens for Lyme arthritis is reviewed. The first treatment for Lyme arthritis, intramuscular benzathine penicillin 2.4 million units weekly for 3 weeks, had a success rate of 35%. Another study employed intravenous penicillin G at a dosage of 20 million units daily for 10 days, which cured 55% of patients. Intravenous ceftriaxone has been shown to be superior to penicillin with a response rate of 94%. However, these results have been challenged in recent reports. Oral doxycycline or amoxicillin in association with probenecid seems to work equally well although neuroborreliosis was more frequent following treatment with amoxicillin. An anecdotal report indicates the usefullness of long-term benzathine penicillin for chronic Lyme arthritis. Long-term antibiotic therapy, which is recommended also for Reiter's syndrome, may be useful for eradicating the sanctuaries of Borrelia burgdorferi. Disease-modifying drugs such as hydroxychloroquine or sulphasalazine, a drug which is commonly used in reactive arthritis following enteric infections, may be of value in Lyme arthritis resistant to antibiotics but have not been tested to date. The role of intraarticular injections of steroids or synovectomy is still controversial. Antibiotic treatment is the cornerstone of Lyme arthritis treatment. Additional interventions should be studied for patients with Lyme arthritis resistant to antibiotics.
Technological advances in computer image analysis have made possible three-dimensional (3D) surface reformations of anatomic structures from contiguous axial CT slices. We have recently utilized this new imaging technique in six patients with primary, isolated craniosynostosis. In each case 3D CT demonstrated the exact extent of synostosis, and in five cases 3D CT images facilitated surgical planning by precisely localizing the proper site for craniectomy. Three-dimensional CT may be a useful adjunct to imaging and surgical planning in this condition.
OBJECTIVE: To evaluate the prevalence of self-reported joint pain and swelling in the peripheral joints of subjects from an Italian general population. To correlate the result with demographic data and physical activity. METHODS: A total of 4,456 subjects aged 16 years or more listed in four general practices were invited to participate in the study and to fill out the ARC questionnaire. The 3,294 responders were asked to report: (a) any past occurrence of joint swelling lasting more than 4 weeks and the distribution of the swollen joints on a mannequin; (b) any joint pain lasting more than 4 weeks; (c) current joint pain or swelling; (d) morning stiffness; (e) whether they had been previously told by a doctor they had arthritis; and (f) their physical activity according to a three-class scale. RESULTS: Joint pain was reported by 889 (27%) subjects and joint swelling was reported by 463 (14%) subjects. Women reported joint pain and swelling more frequently than men, except for the younger age classes. The prevalence of joint pain and swelling increased with age in both sexes until age 55-64, when a plateau was observed. Age was involved in the determination of joint pain and swelling. Physical activity was involved only marginally. CONCLUSIONS: We found high levels of prevalence of pain and swelling in the peripheral joints in a general Italian population. Prevalence was higher in Italian subjects than in subjects from China and Pakistan studied using the same questionnaire. These differences may reflect cultural and social diversity in the perception of disease, as well as true differences in the prevalence of rheumatic symptoms across the world.
The authors present a four years old boy with genitalic infantilism, mild mental retardation and karyotype 48, XXYY. This rare gonosomic aneuploidy is exceptionally discovered during childhood because it is diagnosed in most of cases after puberty for its phenotype similar to the Klinefelter's Syndrome.
The association between systemic lupus erythematosus and human immunodeficiency virus infection is extremely rare. We report a case of this association and discuss the possible reasons for its rarity, together with the difficulties encountered in the interpretation of the clinical and laboratory features.
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