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Normal C1 inhibitor level hereditary angioedema is thought to involve various mutations that increased bradykinin activity and cause a decreased threshold for activation of the plasma contact system thus leading to the symptoms of angioedema. [7] Hereditary angioedema with normal C1-inhibitor is a genetically heterogeneous disorder.
However, it is thought that this disease prevalence could be higher due to diagnostic oversight and the shared symptoms of acquired angioedema with similar diseases. [5] This disease tends to affect males and females equally. [4] Additionally, individuals with acquired angioedema usually develop symptoms in their fourth decade of life or older. [4]
Hereditary angioedema is characterised by severe, painful and unpredictable swelling attacks, which can affect breathing. Gene-editing offers hope for people with potentially fatal hereditary disorder
Angioedema is an area of swelling of the lower layer of skin and tissue just under the skin or mucous membranes. [1] [3] The swelling may occur in the face, tongue, larynx, abdomen, or arms and legs. [1] Often it is associated with hives, which are swelling within the upper skin. [1] [3] Onset is typically over minutes to hours. [1]
Chronic spontaneous urticaria, despite its cause being unknown, is linked to a higher prevalence of autoimmune diseases, and is often worsened by triggers like stress, infections, certain foods, or nonsteroidal anti-inflammatory drugs. The hives and angioedema seen in CSU is thought to be linked to the degranulation of skin mast cells.
Deficiency of this protein is associated with hereditary angioedema ("hereditary angioneurotic edema"), or swelling due to leakage of fluid from blood vessels into connective tissue. [9] Deficiency of C1-inhibitor permits plasma kallikrein activation, which leads to the production of the vasoactive peptide bradykinin.
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