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The Symptoms Of Sickle Cell Anemia Essay

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HISTORY:
The symptoms of Sickle Cell Anemia were observed for over five thousand years in Africa. The first reported case of sickle cell anemia however was in 1846, when an autopsy of a runaway slave showed an absence of a spleen. However, it was first discovered by Ernest Irons, an intern of Dr James B Herrick in the United States in 1910. He viewed an anemic patient’s blood under the microscope and observed “elongated and sickle shaped” red blood cells. However, cases of these sickle shaped red blood cells were of African patients only. In 1922, the disease was named “sickle cell anemia” by Vernon Mason. Hahn and Gillespie discovered in 1927 that red blood cells are made into sickle shaped cells by the change in their molecular structure in the absence of oxygen. In 1948, Watson suggested that infants did not show symptoms of sickle cell anemia because of the presence of fetal hemoglobin, HbF. In 1949, it was shown that the disease was inherited and that only people homozygous for the gene got the disease. In 1951, Linus Pauling and his colleagues showed that sickle cell anemia was caused by abnormality in hemoglobin and had a different chemical structure than normal hemoglobin molecules. They proved the change in structure of sickled cells through gel electrophoresis of hemoglobin from normal blood cells and sickled blood cells. They published the paper “Sickle Cell Anemia, a molecular disease” that spread awareness of the disease. The actual amino acid change however was

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