Corticosterone infused into the dorsal striatum selectively enhances memory consolidation of cued water-maze training.

Glucocorticoid hormones enhance memory consolidation of hippocampus-dependent spatial/contextual learning, but little is known about their possible influence on the consolidation of procedural/implicit memory. Therefore, in this study we examined the effect of corticosterone (2, 5, or 10 ng) infused into the dorsal striatum of male Wistar rats immediately after training on either a cued or spatial version of the water maze. We found that corticosterone dose-dependently enhanced 48-h retention of the cued training without affecting the retention of the spatial training.

Estradiol valerate and alcohol intake: dose-response assessments.

Background: An injection of estradiol valerate (EV) provides estradiol for a prolonged period. Recent research indicates that a single 2.0 mg injection of EV modifies a female rat's appetite for alcoholic beverages.

[A chromatographic analysis of the Mycobacterium tuberculosis strains isolated from an outbreak in HIV patients in Cuba].

A group of strains of Mycobacterium tuberculosis isolated from an outbreak in HIV-infected patients was studied by chromatographic techniques. A group of strains of M. Tuberculosis from symptomatic respiratory patients (SR+ 14) and patterns strains from the laboratory collection were used as a reference aimed at making a qualitative comparison of the chromatographic patterns described by the strains isolated from patients.