No abstract

To explore the syndrome of glucocorticoid-induced hypertension in the elderly, we analyzed the clinical findings from 35 patients aged more than 65 years (12 men, 23 women) who received glucocorticoid therapy. Resting blood pressures (BP) were less than 140/90 mm Hg before glucocorticoid therapy, and patients were apparently disease-free apart from the condition for which glucocorticoid therapy was prescribed. Glucocorticoid-induced hypertension is defined as systolic BP more than 160 mm Hg and/or diastolic BP more than 95 mm Hg after glucocorticoid administration. Glucocorticoid-induced hypertension was seen in 13 patients (37.1%); all patients with hypertension [steroid (glucocorticoid)-induced hypertension (SH(+)) group] received more than 20 mg of prednisolone daily, and BP rose rapidly within a week of commencing glucocorticoid administration. The SH(+) group did not differ significantly in terms of age, heart rate, blood count, plasma biochemistry, plasma renin activity, plasma aldosterone, routine urinalysis, or urinary electrolytes from patients who did not show hypertension [SH(-) group]. However, serum total calcium concentrations were significantly lower in the SH(+) group both before and after 2 weeks of glucocorticoid therapy than in the SH(-) group. Furthermore, the SH(+) group showed a significantly higher percentage of patients with a positive family history of essential hypertension than the SH(-) group. In conclusion, although the detailed mechanisms are as yet uncertain, glucocorticoid-induced hypertension occurs often in elderly patients, and is more common in patients with total serum calcium concentrations lower than the normal range, and/or in those with positive family history of essential hypertension.

No abstract

The effect of (-)15-deoxyspergualin (15-dsp), a new immunosuppressant which was originally separated from the culture filtrate of a strain of Bacillus laterosporus, was evaluated in this study. Various doses of 15-dsp were subcutaneously administered to New Zealand black/white F1 hybrid mice (B/WF1) four times a week starting at 14 weeks of age, just prior to the onset of nephropathy. The life span of the treated animals, studied at 0.6 to 6.0 mg/kg body weights, compared with the control mice was significantly prolonged by 15-dsp treatment (percent survival of the treated mice at 50 to 70 weeks of age was significantly higher than that of the control mice, except that of the 0.6 mg group at 60 wks of age, P less than 0.05 by Fisher's exact test). In the 6.0 mg group of mice, complete suppression of spontaneously progressive splenomegaly with decreased total spleen cells was observed at 24 through 36 weeks of age compared with the same-aged control group of mice (P less than 0.01). Absolute numbers of L3T4+ splenocytes determined by flow cytometry, as well as L3T4+/Lyt2+ ratio, were decreased, while in vitro interleukin 2 production by splenocytes induced with staphylococcal enterotoxin A was significantly enhanced. Serum IgG anti-ds DNA antibody levels, measured by radioimmunoassay in the treated mice, were significantly lower at 24 through 36 weeks of age than those in the control mice (P less than 0.01), and the incidence of significant proteinuria (greater than or equal to 100 mg/dl) in the 15-dsp group was lower at both 32 and 36 weeks of age (P less than 0.001).(ABSTRACT TRUNCATED AT 250 WORDS)

No abstract

No abstract

Feline immunodeficiency virus (FIV) is more readily isolated from CD8 M T cell-depleted peripheral blood mononuclear cells (PBMC) of FIV-infected cats than from unfractionated PBMC cultures. However, it is not known whether feline CD8 M T cells downregulate FIV expression by direct interaction with FIV-infected cells or via a soluble mediator. Furthermore, it is not known whether this anti-FIV activity involves a lytic or non-lytic mechanism. In the present study, we demonstrated that autologous and allogeneic CD8 M T cells from asympto-

No abstract