TY - CHAP M1 - Book, Section TI - Chapter 162. Endothelium in Inflammation and Angiogenesis A1 - Petzelbauer, Peter A1 - Loewe, Robert A1 - Pober, Jordan S. A2 - Goldsmith, Lowell A. A2 - Katz, Stephen I. A2 - Gilchrest, Barbara A. A2 - Paller, Amy S. A2 - Leffell, David J. A2 - Wolff, Klaus PY - 2012 T2 - Fitzpatrick's Dermatology in General Medicine, 8e AB - |PrintEndothelium at a GlanceAll blood vessel endothelial cells (ECs) perform three important constitutive functions: Maintaining homeostasis of the blood.Forming a barrier that separates circulating blood from the tissue.Regulating the extent of local blood flow.The cutaneous vasculature is divided into a superficial vascular plexus and a deep vascular plexus. The superficial vascular plexus is formed by parallel pairs of arterioles and venules connected via capillary loops that extend into the dermal papillae.ECs participate in innate and adaptive immune responses.Tumor necrosis factor-α and interleukin-1β are important modulators of EC function.Vascular ECs contribute to inflammation through distinctive patterns of adhesion molecule expression. In the skin, E-selectin, vascular adhesion molecule 1, and intercellular adhesion molecule 1 may be particularly important.Microvessels of the skin in situ basally express major histocompatibility complex (MHC) class I and II molecules at their luminal surfaces and may present antigen in an MHC-restricted manner to T cells.In the healthy adult, blood vessels are stable structures with very slow turnover of ECs. In chronic inflammation, tissue injury, wound healing, and tumor growth, new vessels are formed (angiogenesis) and existing vessels undergo remodeling.Keratinocytes produce a wide range of angiogenic factors, including members of the fibroblast or transforming growth factor protein family, platelet-derived growth factor, and vascular endothelial growth factor, as well as chemokines like cutaneous T cell-attracting chemokine. Vascular remodeling is a prominent feature of psoriasis. SN - PB - The McGraw-Hill Companies CY - New York, NY Y2 - 2024/04/19 UR - accessmedicine.mhmedical.com/content.aspx?aid=56077911 ER -