Coagulation, Bradykinin, Polyphosphates, and Angioedema

Hereditary angioedema is a rare genetic disorder in which deficiency or dysfunction of C1 inhibitor leads to uncontrolled activation of the contact system, causing recurrent and potentially life-threatening swelling of the skin, airways, and gastrointestinal tract. At its core, the condition hinges on the aberrant production of bradykinin, a vasoactive peptide generated when coagulation factor XII and tissue kallikreins cleave kininogens unchecked, with polyphosphates increasingly recognized as upstream triggers of this cascade. Research now centers on refining how mutations in genes encoding C1 inhibitor, factor XII, and kinin receptors translate into variable clinical severity, and on developing more targeted therapies — including bradykinin-receptor antagonists and factor XI antisense oligonucleotides — that interrupt the cascade at precise molecular points. Key open questions include why some patients with identical mutations experience dramatically different attack frequencies, and how the contact activation system interacts with inflammatory and coagulation pathways in ways that might reveal entirely new therapeutic targets.

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47,144

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758,543

Keywords

Hereditary AngioedemaKinin Receptor FamilyCoagulation Factor XIIPolyphosphateC1 Inhibitor DeficiencyBradykinin-Receptor Antagonist