sickle cell anemia


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Related to sickle cell anemia: sickle cell trait, thalassemia, Sickle cell crisis

sickle cell anemia

n.
A chronic, severe, and sometimes fatal anemia marked by crescent-shaped red blood cells and characterized by fever, leg ulcers, jaundice, and episodic pain in the joints. The disease occurs in people who are homozygous for a gene that produces an abnormal form of hemoglobin, and it is found chiefly in people of African descent and in some Mediterranean, Middle Eastern, Central and South American, and South Asian populations. Also called sickle cell disease.

sick′le cell` ane′mia



n.
a chronic hereditary blood disease, primarily affecting indigenous Africans and their descendants, in which an accumulation of oxygen-deficient sickle cells results in anemia, blood clotting, and joint pain.
Also called sicklemia.
[1925–30]

sick·le cell anemia

(sĭk′əl)
A hereditary disease characterized by red blood cells that are sickle-shaped instead of round because of an abnormality in the hemoglobin, the protein that carries oxygen in the blood. Because of their shape, the cells can cause blockage of small blood vessels in the organs and bones, reducing the amount of oxygen available to those tissues.
Did You Know? Genetic mutations can be good or bad, and sometimes they can even be both. The mutation that causes sickle cell anemia is one example. It is harmful if a person inherits two copies of the mutated gene (one from each parent), but there is actually some benefit if only one copy of the gene is inherited. The defective gene causes red blood cells to be distorted into a sickle shape, which makes it hard for them to pass through the tiny blood vessels where they give oxygen to body tissues. If a person's chromosomes have two copies of the mutated gene, serious sickle cell anemia results, causing illness. With just one copy of the gene, though, only some mild sickling of the cells occurs. It so happens that this mild sickling is harmful to the parasite that causes malaria, and can protect a person from that disease. In a region like tropical Africa where malaria is common, people who have the mutation in one gene are more likely to ward off a malarial infection and to live long enough to have children, who then inherit the gene in turn. And because inheriting two copies of the gene is much less likely than inheriting just one, the benefits of the gene outweigh its risks for most people in these regions.
References in periodicals archive ?
Hemoglobin F and clinical severity of sickle cell anemia among Nigerian adults.
Diggs (Lemuel Whitley Diggs), a physician who treated sickle cell anemia in a segregated hospital in Memphis, Tennessee, created the SouthAEs first blood bank, and established the countryAEs first sickle cell treatment and research center.
Conclusion: BMI and other anthropometric variables among children with sickle cell anemia were low when compared with children with normal Haemoglobin genotype.
They also lauded the minister's encouragement of serious and active civil society organisations, anticipating the minister's consent to patronise the blood donation campaign in favour sickle cell anemia patients.
Pro-oxidation and anti-oxidant status in patients of sickle cell anemia.
Approximately 5% of the world s population carries trait genes for hemoglobin disorders, mainly sickle cell anemia and thalassemia, according to the World Health Organization.
Conclusion: The seroprevalence of Hepatitis C virus antibodies among regularly transfused sickle cell anemia patients is significantly higher than those not requiring transfusions.
Homozygous sickle cell anemia is an autosomal codominantly inherited disorder that results in chronic hemolytic anemia.
Sickle cell anemia is a serious, life-threatening blood disease.
Kohn, a professor of microbiology, immunology and molecular genetics at UCLA, received more than $9 million to develop blood stem cells that could eventually be used to cure sickle cell anemia.
Iron deficiency in sickle cell anemia in Nigerian children.
Folate deficiency may also occur in sickle cell anemia, a hereditary hemolytic anemia in which the presence of an abnormal hemoglobin results in distorted, sickle-shaped erythrocytes.