Rabdomiolisis en pacientes trasplantados / Rhabdomyolisis in transplanted patients

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[Deficiency, disability and handicap in multiple sclerosis: a population-based study in Valladolid]. / Deficiencia, discapacidad y minusvalía en la esclerosis múltiple: un estudio de base poblacional en Valladolid.

INTRODUCTION: Apart from impairment there is hardly any other assessment of the repercussions of multiple sclerosis (MS) in population studies. OBJECTIVE: To analyze the functional state of en epidemiological series of patients in the Valladolid health district. MATERIAL AND METHODS: A descriptive transversal study of a geographically defined population base. During a period of three months and complementing a prevalence study, were assessed, by means of the Minimal Record of Disability, impairment, disability and handicap in a series of 51 patients (33 women and 18 men) with clinically defined MS, who lived in the area on 1 March 1997. RESULTS: There was a primarily progressive evolution in 21.6% of the patients, and secondarily progressive in 11.8%. Average follow-up time was 9.1 years (range 1-41) and average age of onset 27.8 years (range 14.7-51.0). The distribution of scores on the Expanded Disability Status Scale was bimodal (average and interquartile range: 3.0 (1.5-5.0). 80.4% of the patients continued to be ambulatory. 21.5% had frequent urinary incontinence or required a long-term urinary catheter. Less than 20% needed help with day to day activities. 78% of the patients complained of some degree of fatigue, and 51% had difficulties with social relationships. 59.4% of the patients had full-time jobs and 70.6% had no financial problems. CONCLUSIONS: The study shows that the functional state of persons with MS is better than was thought, and that assessment of the consequences of this illness should include disability and handicap profiles.

Insulin receptor interaction in human placental plasma membranes.

Insulin-receptor interaction in partially purified preparations of human placental plasma membranes from normal mothers at term of pregnancy has been characterized. 125I-insulin became rapidly and reversibly bound to plasma membranes, being time and temperature dependent. The binding readily appeared at 1.0 ng/ml insulin concentration which falls within the physiological range of peripheral blood. Low levels of unlabeled insulin inhibited binding; 20 ng/ml insulin produced fifty per cent inhibition. Scatchard plots of data from competitive insulin binding proved to be curvilinear. The insulin greater ability for binding observed in this preparation can be explained by the purification degree achieved at the plasma membranes. 125I-insulin was less degraded by partially purified placental plasma membranes than by a microsomal-membrane preparation obtained without differential centrifugation in sucrose linear gradient. All these properties strongly suggest that the insulin-binding sites characterized in the plasma membrane fraction of the placenta represent biologically important receptors to hormone.

Effects of thyroid hormones on liver binding sites for human growth hormone, as studied in the rat.

Several weeks after thyroidectomy (T), female rats stopped growing, and their pituitary GH content had decreased to less than 2--3% of the values found for age-matched controls (C). The liver membranes of such animals were explored with human GH (hGH). It was found that in the severely hypothyroid T rat, the number, but not the affinity, of the lactogenic binding sites was markedly reduced. Treatment of these rats for 3 weeks with 1.75 micrograms or T4 or 0.5 micrograms T3/100 g body weight/day restored growth, increased pituitary GH content and restored the number of liver lactogenic binding sites were practically to normal. As regards the lactogenic binding sites, similar results were obtained when the severely hypothyroid rats were treated with a much lower T4 dose (0.2 microgram/100 g/day): this dose was clearly growth promoting, and restored to normal both the low circulating GH levels and the pituitary PRL content of the severely hypothyroid rat. The changes in plasma PRL were not clear. The lactogenic binding sites on liver membranes from rats which were both thyroidectomized and hypophysectomized were decreased in number. Treatment with 0.5 microgram T3/100 g/day for 30 days (but not for 12 days) resulted in an increase in the number of lactogenic binding sites, though it did not affect growth or the undetectable plasma GH levels. The effect on the lactogenic binding sites was less marked than in T rats with an intact pituitary. It would appear that minute amounts of thyroid hormones are needed for maintenance of liver lactogenic binding sites; it is possible that this not only occurs through mechanism(s) which involve the pituitary, but also through others which do not. The possible role of these receptors in growth processes is not yet clearly understood.