What Do We Know About Heredity And Sickle Cell
Disease?
Sickle cell disease is the most common inherited blood
disorder in the United States. Approximately 80,000 Americans
have the disease.
In the United States, sickle cell disease is most prevalent
among African Americans. About one in 12 African Americans and
about one in 100 Hispanic Americans carry the sickle cell
trait, which means they are carriers of the disease.
Sickle cell disease is caused by a mutation in the
hemoglobin-Beta gene found on chromosome 11.
Hemoglobin transports oxygen from the lungs to other parts
of the body. Red blood cells with normal hemoglobin
(hemoglobin-A) are smooth and round and glide through blood
vessels.
In people with sickle cell disease, abnormal hemoglobin
molecules - hemoglobin S - stick to one another and form long,
rod-like structures. These structures cause red blood cells to
become stiff, assuming a sickle shape.
Their shape causes these red blood cells to pile up, causing
blockages and damaging vital organs and tissue.
Health
Related Websites
The National Cancer
Institute
The National Eye
Institute
The National Heart, Lung,
and Blood Institute

National Institute on
Aging

National Institute of
Allergy and Infectious Diseases

National Institute of
Arthritis and Musculoskeletal and Skin Diseases

National Institute of
Diabetes and Digestive and Kidney Diseases

National Institute on Drug
Abuse

National Institute of Mental
Health

National Institute of
Neurological Disorders and Stroke
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