The American Journal of Tropical Medicine and Hygiene
Dengue virus (DENV) is considered to be the most important arthropod-borne viral disease and causes more than 100 million human infections annually. To further characterize primary DENV infection in vivo, rhesus macaques were infected with DENV-1, DENV-2, DENV-3, or DENV-4 and clinical parameters, as well as specificity and longevity of serologic responses, were assessed. Overt clinical symptoms were not present after infection.
Exposure to environmental lead (Pb) is a mild risk factor for amyotrophic lateral sclerosis (ALS), a paralytic disease characterized by progressive degeneration of motor neurons. However, recent evidence has paradoxically linked higher Pb levels in ALS patients with longer survival. We investigated the effects of low-level Pb exposure on survival of mice expressing the ALS-linked superoxide dismutase-1 G93A mutation (SOD1(G93A)). SOD1(G93A) mice exposed to Pb showed longer survival and increased expression of VEGF in the ventral horn associated with reduced astrocytosis.
BACKGROUND & AIMS: Immunological disorders of the gastrointestinal tract such as inflammatory bowel disease often result in recurrent and persistently elevated levels of proinflammatory cytokines. Kinase suppressor of Ras 1 (KSR1) is involved in tumor necrosis factor-mediated colon epithelial cell survival, yet its role in chronic inflammation has not been defined. In this study, we tested the hypothesis that KSR1 is protective against spontaneous experimental colitis.