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Favism
FavismA condition characterized by hemolytic anemia (breakup of red blood cells) after eating fava beans (Vicia fava) or being exposed to the pollen of the fava plant. This dangerous reaction occurs exclusively in people with a deficiency of the enzyme glucose-6-phosphate dehydrogenase (G6PD), an X-linked genetic trait. However, not all G6PD-deficient families appear at risk for favism, indicating the additional need for a single autosomal (not X-linked) gene to create the susceptibility to favism of G6PD-deficient persons. The active hemolytic principle in fava beans is > likely DOPA-quinone. Differences in susceptibility to favism may be related to differences in the enzymatic system that converts L-DOPA to DOPA-quinone. RELATED TERMS-------------------------------------- Condition The term "condition" has a number of biomedical meanings including the following: 1.An unhealthy state, such as in "this is a progressive condition." 2.A state of fitness, such as "getting into condition." 3.Something that is essential to the occurrence of something else; essentially a "precondition." 4.As a verb: to cause a change in something so that a response that was previously associated with a certain stimulus becomes associated with another stimulus; to condition a person, as in behavioral conditioning. Anemia Anemia is a condition in which a deficiency in the size or number of erythrocytes (red blood cells) or the amount of hemoglobin they contain limits the exchange of oxygen and carbon dioxide between the blood and the tissue cells. Most anemias are caused by a lack of nutrients required for normal erythrocyte synthesis, principally iron, vitamin B-12, and folic acid. Others result from a variety of conditions, such as hemorrhage, genetic abnormalities, chronic disease states or drug toxicity. Blood The life-maintaining fluid which is made up of plasma, red blood cells (erythrocytes), white blood cells (leukocytes), and platelets; blood circulates through the body's heart, arteries, veins, and capillaries; it carries away waste matter and carbon dioxide, and brings nourishment, electrolytes, hormones, vitamins, antibodies, heat, and oxygen to the tissues. Pollen Pollen is the male fertilising agent of flowering plants, grasses, trees and weeds. Enzyme A cellular protein whose shape allows it to hold together several other molecules in close proximity to each other. In this way, enzymes are able to induce chemical reactions in other substances with little expenditure of energy and without being changed themselves. Basically, an enzyme acts as a catalyst. Genetic Hereditary. Having to do with the genes. Risk In clinical trials, the probability of harm or discomfort for subjects, arising from the test product. Acceptable risk differs depending on the condition for which a product is being tested. A product for sore throat, for example, will be expected to have a low incidence of side effects. However, unpleasant side effects may be an acceptable risk when testing a promising treatment for a life-threatening illness. Favism A condition characterized by hemolytic anemia (breakup of red blood cells) after eating fava beans (Vicia fava) or being exposed to the pollen of the fava plant. This dangerous reaction occurs exclusively in people with a deficiency of the enzyme glucose-6-phosphate dehydrogenase (G6PD), an X-linked genetic trait. However, not all G6PD-deficient families appear at risk for favism, indicating the additional need for a single autosomal (not X-linked) gene to create the susceptibility to favism of G6PD-deficient persons. The active hemolytic principle in fava beans is > likely DOPA-quinone. Differences in susceptibility to favism may be related to differences in the enzymatic system that converts L-DOPA to DOPA-quinone. Autosomal "Pertaining to a chromosome that is not a sex chromosome; relating to any one of the chromosomes save the sex chromosomes. People normally have 22 pairs of autosomes (44 autosomes) in each cell together with two sex chromosomes (X and Y in the male and XX in the female). " Gene 1. A unit of DNA that carries information for the biosynthesis of a specific product in the cell. 2. Ultimate unit by which inheritable characteristics are transmitted to succeeding generations in all living organisms. Genes are contained by, and arranged along the length of, the chromosome. The gene is composed of deoxyribonucleic acid (DNA). Each chromosome of each species has a definite number and arrangement of genes, which govern both the structure and metabolic functions of the cells and thus of the entire organism. SIMILAR TERMS-------------------------------------- PREVIOUS AND NEXT TERMS-------------------------------------- Fatty alcohol Fatty alcohol: NAD+ oxidoreductase deficiency. Clinically known as the Sjogren-Larsson syndrome, this is a genetic (inherited) disease usually characterized by a triad of findings consisting of ichthyosis (thickened fish-like skin), spastic paraplegia (spasticity of the legs) and mental retardation. Fatty aldehyde dehydrogenase deficiency Also known as the Sjogren-Larsson syndrome, this is a genetic (inherited) disease usually characterized by a triad of clinical findings consisting of ichthyosis (thickened fish-like skin), spastic paraplegia (spasticity of the legs) and mental retardation. Fatty liver of pregnancy, acute Liver failure in late pregnancy, usually from unknown cause. Acute fatty liver of pregnancy (AFLP) typically occurs in first-time pregnancies in the last trimester. Fauces The throat. The word fauces is the plural of the Latin faux meaning a small passage. Fava bean The broad bean to which many people react adversely with an acute hemolytic anemia with sudden breakup of red blood cells (see Favism). Fava beans look like large tan lima beans. They are popular in Mediterranean and Middle Eastern cuisines, are eaten raw when very young, cooked in soups and many other dishes, and made into fava brittle (like peanut brittle) as candy. The botanical name for fava is Vicia fava. Fava is Italian for bean and refers specifically to the broad bean. Fava beans are the main commercial source of the drug L-DOPA. Favism FBLN3 The gene encoding the protein known as fibulin 3. FBLN5 The gene encoding the protein known as fibulin 5. FBN1 The fibrillin 1 gene. This gene is mutated in Marfan syndrome, the MASS syndrome, and related disorders of connective tissue. The FBN1 gene produces a protein called fibrillin-1 which is transported out of the cell and deposited in the extracellular matrix, the intricate lattice in which cells are embedded to build tissues. In this matrix, fibrillin becomes part of small threadlike filaments called microfibrils, which in turn help build elastic fibers. Elastic fibers are essential for the function of flexible structures such as blood vessels, the lungs, and skin. FCC In medicine, familial colorectal cancer. Fear of animals An abnormal and persistent fear of animals termed "zoophobia. A phobia is an unreasonable fear that can cause avoidance and panic. Phobias are a relatively common type of anxiety disorder. Phobias can be treated with cognitive behavioral therapy using exposure and fear reduction techniques. In many cases, anti-anxiety or anti-depressant medication proves helpful, especially during the early stages of therapy. "Zoophobia" encompasses fears of specific types of animals such as of spiders (arachnophobia), birds (ornithophobia), bees (apiphobia), etc. It is literally a zoo-ful of beastly phobias. We thank you for using the Medical Glossary to search for Favism. If you have a better definition for Favism than the one presented here, please let us know by making use of the suggest a term option. This definition of Favism may be disputed by other professionals. Our attempt is to provide easy definitions on Favism and any other medical topic for the public at large.
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