What is Cholesterol?Cholesterol is a sterol (a combination steroid and alcohol). Cholesterol is a lipid found in the cell membranes of all tissues, and it is transported in the blood plasma of all animals. Because cholesterol is synthesized by all eukaryotes, trace amounts of cholesterol are also found in membranes of plants and fungi.The name originates from the Greek chole- (bile) and stereos (solid), and the chemical suffix -ol for an alcohol, as researchers first identified cholesterol in solid form in gallstones by Francois Poulletier de la Salle in 1769. However, it is only in 1815 that chemist Eugene Chevreul named the compound "cholesterine".[2]Most of the cholesterol is synthesized by the body and some has dietary origin. Cholesterol is more abundant in tissues which either synthesize more or have more abundant densely-packed membranes, for example, the liver, spinal cord and brain. It plays a central role in many biochemical processes, such as the composition of cell membranes and the synthesis of steroid hormones. Cholesterol is insoluble in blood, but is transported in the circulatory system bound to one of the varieties of lipoprotein, spherical particles which have an exterior composed mainly of water-soluble proteins. The main types, low-density lipoprotein (LDL) and high-density lipoprotein (HDL) carry cholesterol from and to the liver.According to the lipid hypothesis, abnormally high cholesterol levels (hypercholesterolemia) and abnormal proportions of LDL and HDL are associated with cardiovascular disease by promoting atheroma development in arteries (atherosclerosis). This disease process leads to myocardial infarction (heart attack), stroke and peripheral vascular disease. As high LDL contributes to this process, it is termed "bad cholesterol", while high levels of HDL ("good cholesterol") offer a degree of protection. The balance can be redressed with exercise, a healthy diet, and sometimes medication. |
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Does a Message from the Matrix Raise Your Blood Pressure? -- 2006 Cell 124, 893-895 (2006). Online Journal. Citation: Does a Message from the Matrix Raise Your Blood Pressure? Sci. STKE 2006, tw91 (2006). High Blood Pressure News 10-07-2006, High blood pressure in kids linked with sleep breathing problems 06-26-2006, Blood pressure drug may benefit heart patients with impaired Older Hispanics Can Prevent High Blood Pressure, March 21, 2006 Almost half of Hispanics over age 65 have high blood pressure, but many donâ™t know they have it because they feel just fine. Even though high blood pressure Kidney and Blood Pressure Research 2006, 92, No. 3, 135-143, Published online first. 29, No. 6, 329-397, January 2007 1998 can be found in the PubMed Database: Kidney Blood Press Res High Blood Pressure (Hypertension) Too much salt has been linked to high blood pressure. The average Australian eats more than double the amount of salt their body needs. Date:, Nov 2006 Arch Intern Med -- Abstract: Cocoa Intake, Blood Pressure, and Effects of Low Habitual Cocoa Intake on Blood Pressure and Bioactive Nitric Oxide: A Randomized 2006 American Medical Association. All Rights Reserved. Blood Pressure Please choose the type of alert you would like: New Issue Alert - New issues of Blood Pressure will trigger an alert Issue 6, 2006 Lowering Your Blood Pressure: The Options If you want to know what to do to lower your blood pressure naturally -- you'll find it here. I look forward to helping you lower your blood pressure. How to Treat High blood pressure information (Pulmonary High blood pressure information - Medical information about Pulmonary Hypertension, (C)2006-2007 Treat High Blood Pressure, All rights reserved. Blood Pressure Drugs Could Help Halt Pancreatic Cancer Spread 8, 2006) â” Common blood pressure medications might help block the spread of pancreatic cancer, researchers at the Kimmel Cancer Center at Thomas Jefferson |
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