RESUMO
The mechanisms underlying adult hippocampal neurogenesis (AHN) are not fully understood. AHN plays instrumental roles in learning and memory. Understanding the signals that regulate AHN has implications for brain function and therapy. Here we show that Caveolin-1 (Cav-1), a protein that is highly enriched in endothelial cells and the principal component of caveolae, autonomously regulates AHN. Conditional deletion of Cav-1 in adult neural progenitor cells (nestin +) led to increased neurogenesis and enhanced performance of mice in contextual discrimination. Proteomic analysis revealed that Cav-1 plays a role in mitochondrial pathways in neural progenitor cells. Importantly, Cav-1 was localized to the mitochondria in neural progenitor cells and modulated mitochondrial fission-fusion, a critical process in neurogenesis. These results suggest that Cav-1 is a novel regulator of AHN and underscore the impact of AHN on cognition.
RESUMO
OBJECTIVES: To assess the current use and application of simulators in interventional cardiology. BACKGROUND: Despite a paucity of data on the efficacy of simulation in medicine, cardiovascular simulation training is now a mandated part of cardiovascular fellowship training. Additionally, simulators have been endorsed by the Food and Drug Administration as a way to teach physicians new and novel procedures. We sought to establish the current use of simulators in cardiovascular medicine. METHODS: A systematic review was done of available training programs, and currently existing data regarding simulation training. A panel of experts was convened to review this data and provide recommendations as how simulation should be used in the field of interventional cardiology. RESULTS: This document provides a comprehensive review of the current state of simulation and how we as a society must formulate well validated studies to more closely examine and explore how this technology can be further studied and validated. CONCLUSIONS: Simulation will likely take on a larger role in cardiovascular training and maintenance of certification, but at the current time lacks a large body of evidence for its use.
