0000000000593250
AUTHOR
Jesús Cosín Roger
Induction of CD36 and Thrombospondin-1 in Macrophages by Hypoxia-Inducible Factor 1 and Its Relevance in the Inflammatory Process
Inflammation is part of a complex biological response of vascular tissue to pathogens or damaged cells. First inflammatory cells attempt to remove the injurious stimuli and this is followed by a healing process mediated principally by phagocytosis of senescent cells. Hypoxia and p38-MAPK are associated with inflammation, and hypoxia inducible factor 1 (HIF-1) has been detected in inflamed tissues. We aimed to analyse the role of p38-MAPK and HIF-1 in the transcriptional regulation of CD36, a class B scavenger receptor, and its ligand thrombospondin (TSP-1) in macrophages and to evaluate the involvement of this pathway in phagocytosis of apoptotic neutrophils. We have also assessed HIF-1α, p…
Progastrin Represses the Alternative Activation of Human Macrophages and Modulates Their Influence on Colon Cancer Epithelial Cells
Macrophage infiltration is a negative prognostic factor for most cancers but gastrointestinal tumors seem to be an exception. The effect of macrophages on cancer progression depends on their phenotype, which may vary between M1 (pro-inflammatory, defensive) to M2 (tolerogenic, pro-tumoral). Gastrointestinal cancers often become an ectopic source of gastrins and macrophages present receptors for these peptides. The aim of the present study is to analyze whether gastrins can affect the pattern of macrophage infiltration in colorectal tumors. We have evaluated the relationship between gastrin expression and the pattern of macrophage infiltration in samples from colorectal cancer and the influe…
Relevance of the macrophage phenotype in mucosal regeneration in Inflammatory Bowel Disease
La enfermedad Inflamatoria Intestinal (EII) es una enfermedad crónica, recidivante, de carácter sistémico que afecta principalmente al tracto gastrointestinal. Esta patología engloba dos entidades clínicas, la Enfermedad de Crohn (EC) y la Colitis Ulcerosa (CU), que difieren en algunos aspectos pero comparten la disrupción de la barrera epitelial y la respuesta exacerbada del sistema inmunológico a la flora bacteriana. La etiología de la enfermedad es desconocida pero se sabe que factores genéticos (tanto alteraciones a nivel genético como la presencia de miRNAs), ambientales (tales como la dieta, tabaco, actividad física o la calidad del sueño), flora intestinal y sistema inmunológico cont…