RESUMEN
An anaerobic, halophilic, and fermentative bacterium, strain S200(T), was isolated from a core sample of a deep hypersaline oil reservoir. Cells were rod-shaped, non-motile, and stained Gram-positive. It grew at NaCl concentrations ranging from 6 to 26% (w/v), with optimal growth at 15% (w/v) NaCl, and at temperatures between 25 and 47°C with an optimum at 40-45°C. The optimum pH was 7.3 (range 6.2-8.8; no growth at pH 5.8 and pH 9). The doubling time in optimized growth conditions was 3.5 h. Strain S200(T) used exclusively carbohydrates as carbon and energy sources. The end products of glucose degradation were lactate, formate, ethanol, acetate, H(2), and CO(2). The predominant cellular fatty acids were non-branched fatty acids C(16:1), C(16:0), and C(14:0). The G + C mole% of the DNA was 32.7%. Phylogenetic analysis based on the 16S rRNA gene sequence revealed that strain S200(T) formed a distinct lineage within the family Halobacteroidaceae, order Halanaerobiales, and was most closely related to Halanaerobaculum tunisiense DSM 19997(T) and Halobacteroides halobius DSM 5150(T), with sequence similarity of 92.3 and 91.9%, respectively. On the basis of its physiological and genotypic properties, strain S200(T) is proposed to be assigned to a novel species of a novel genus, for which the name Halanaerocella petrolearia is proposed. The type strain of Halanaerocella petrolearia is strain S200(T) (=DSM 22693(T) = JCM 16358(T)).
Asunto(s)
Metabolismo de los Hidratos de Carbono/fisiología , Bacterias Grampositivas Formadoras de Endosporas/genética , Bacterias Grampositivas Formadoras de Endosporas/metabolismo , Filogenia , Anaerobiosis/fisiología , Secuencia de Bases , Genotipo , Bacterias Grampositivas Formadoras de Endosporas/citología , Bacterias Grampositivas Formadoras de Endosporas/aislamiento & purificación , Concentración de Iones de Hidrógeno , Datos de Secuencia Molecular , SalinidadRESUMEN
1 Twenty patients with essential hypertension completed a double-blind, dose-tritrated, cross-over comparison of methyldopa and labetalol. 2 Average lying BPs (systolic/diastolic) were reduced by 28/15 mmHg with methyldopa and by 23/15 mmHg with labetalol. 3 Average standing BPs (systolic/diastolic) were reduced by 29/14 mmHg with methyldopa and by 29/15 mmHg with labetalol. 4 Both lying and standing heart rates were reduced with labetalol. 5 It is concluded that the antihypertensive properties of labetalol and methyldopa are similar but that larger patient populations are needed to study the relative incidence of subjective adverse effects.
RESUMEN
1 In a multicentre open trial, labetalol was given to 128 patients in ten centres. Forty-three patients had not previously received antihypertensive therapy; the remainder (85 patients) had been on antihypertensive therapy with either unsatisfactory BP control or troublesome side-effects. 2 Thirty-two patients were withdrawn from the trial in the first 6 months of therapy, 24 (19% of the total) because of side-effects. 3 Control of BP was generally satisfactory or considerably improved. Other drugs (usually a diuretic) had to be added in 23 patients. 4 There was an abnormality of liver function in one patient; otherwise there were no biochemical or haematological problems.
RESUMEN
1 Twenty patients with essential hypertension completed a double-blind, dose-tritrated, cross-over comparison of methyldopa and labetalol. 2 Average lying BPs (systolic/diastolic) were reduced by 28/15 mmHg with methyldopa and by 23/15 mmHg with labetalol. 3 Average standing BPs (systolic/diastolic) were reduced by 29/14 mmHg with methyldopa and by 29/15 mmHg with labetalol. 4 Both lying and standing heart rates were reduced with labetalol. 5 It is concluded that the antihypertensive properties of labetalol and methyldopa are similar but that larger patient populations are needed to study the relative incidence of subjective adverse effects.
Asunto(s)
Etanolaminas/uso terapéutico , Hipertensión/tratamiento farmacológico , Labetalol/uso terapéutico , Metildopa/uso terapéutico , Recuento de Células Sanguíneas , Presión Sanguínea/efectos de los fármacos , Ensayos Clínicos como Asunto , Método Doble Ciego , Femenino , Frecuencia Cardíaca/efectos de los fármacos , Humanos , Masculino , Persona de Mediana Edad , Cooperación del Paciente , Factores de TiempoRESUMEN
20 patients (12 female) with moderately severe essential hypertension [blood pressure during placebo treatment 181 +/- 6 (systolic), 107 +/- 3 (diastolic)] completed a double-blind, cross-over dose-titrated comparison of labetalol and methyldopa. Both drugs reduced lying and standing arterial blood pressure to a similar extent, although only labetalol reduced heart rate. Compliance was high (greater than 95%) with both drugs, and the incidence of subjective adverse effects was similar.