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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Blood Pressure Drug May Help Stall Parkinson's Blood Pressure Drug May Help Stall Parkinson's. ScienceDaily (Jun. The drug rejuvenates aging dopamine cells, whose death in the brain causes the Blood pressure drug may help stall Parkinson's say researchers A common drug used to treat high blood pressure could slow the devastating The drug in the US study blocked the interplay between dopamine and calcium, Common Blood Pressure Drug Could One Day Slow Or Halt Parkinson's The drug isradipine, commonly used to treat blood pressure and stroke, "This drug will protect dopamine neurons, so that if you began taking it early pressure species production, NADPH oxidase, and blood dopamine dopamine receptor regulation of reactive. oxygen species production, NADPH oxidase, and blood pressure. Am J Physiol Regul Integr Comp Physiol 290: R96â“R104 Dopamine - Wikipedia, the free encyclopedia Dopamine can be supplied as a medication that acts on the sympathetic nervous system, producing effects such as increased heart rate and blood pressure. Dopamine (Dopamine Hydrochloride) drug indications and dosage Learn the indications and dosage for Dopamine (Dopamine Hydrochloride) and other In titrating to the desired increase in systolic blood pressure, dopamine Continuous blood pressure (via intra-arterial catheter for rates > 5mg/kg/minute) and ECG monitoring required. The following areas may administer dopamine The role of epinephrine, norepinephrine, and dopamine in blood The role of epinephrine, norepinephrine, and dopamine in blood pressure Pre-operative disturbances of blood pressure, sustained or paroxysmal, Select-a-Jet Dopamine It is usually associated with very low blood pressure and the production of As dopamine improves blood flow to organs and increases the production of Mechanisms of blood pressure increase induced by dopamine in These results suggest that, in a portion of hypotensive preterm neonates, the increase in blood pressure induced by dopamine is related to a predominant New genetic link to high blood pressure found "While many genes are involved in blood pressure and the inherited risk of developing hypertension, we're learning that variations in genes for dopamine |
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