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  2. Sickle cell disease - Wikipedia

    en.wikipedia.org/wiki/Sickle_cell_disease

    Sickle cell disease (SCD), also simply called sickle cell, is a group of hemoglobin-related blood disorders typically inherited. [2] The most common type is known as sickle cell anemia. [2] It results in an abnormality in the oxygen-carrying protein haemoglobin found in red blood cells. [2] This leads to a rigid, sickle -like shape under ...

  3. Sickle cell trait - Wikipedia

    en.wikipedia.org/wiki/Sickle_cell_trait

    Hematology. Sickle cell trait describes a condition in which a person has one abnormal allele of the hemoglobin beta gene (is heterozygous), but does not display the severe symptoms of sickle cell disease that occur in a person who has two copies of that allele (is homozygous). Those who are heterozygous for the sickle cell allele produce both ...

  4. Heterozygote advantage - Wikipedia

    en.wikipedia.org/wiki/Heterozygote_advantage

    Sickle-cell anemia (SCA) is a genetic disorder caused by the presence of two incompletely recessive alleles. When a sufferer's red blood cells are exposed to low-oxygen conditions, the cells lose their healthy round shape and become sickle-shaped. This deformation of the cells can cause them to become lodged in capillaries, depriving other ...

  5. US FDA approves two gene therapies for sickle cell disease - AOL

    www.aol.com/news/us-approves-two-gene-therapies...

    By Leroy Leo and Bhanvi Satija (Reuters) -The U.S. Food and Drug Administration (FDA) on Friday approved two gene therapies for sickle cell disease, making one of them the first treatment in the ...

  6. Promising new gene therapies for sickle cell are out of reach ...

    www.aol.com/news/promising-gene-therapies-sickle...

    The price tags for the two sickle cell therapies in the U.S. are $3.1 million and $2.2 million although costs can vary by country. The process of giving the therapies is just as big a hurdle.

  7. Pleiotropy - Wikipedia

    en.wikipedia.org/wiki/Pleiotropy

    Sickle cell anemia is a classic example of the mixed benefit given by the staying power of pleiotropic genes, as the mutation to Hb-S provides the fitness benefit of malaria resistance to heterozygotes as sickle cell trait, while homozygotes have significantly lowered life expectancy—what is known as "heterozygote advantage". Since both of ...

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