Concept

Tissue-type plasminogen activator

Summary
Tissue-type plasminogen activator, short name tPA, is a protein involved in the breakdown of blood clots. It is encoded in the human by the PLAT gene. It is a serine protease () found on endothelial cells, the cells that line the blood vessels. As an enzyme, it catalyzes the conversion of plasminogen to plasmin, the major enzyme responsible for clot breakdown. Human tPA has a molecular weight of ~70 kDa in the single-chain form. tPA can be manufactured using recombinant biotechnology techniques; tPA produced by such means are referred to as recombinant tissue plasminogen activator (rtPA). Specific rtPAs include alteplase, reteplase, and tenecteplase. They are used in clinical medicine to treat embolic or thrombotic stroke. The use of this protein is contraindicated in hemorrhagic stroke and head trauma. The antidote for tPA in case of toxicity is aminocaproic acid. Medical uses tPA is used in some cases of diseases that feature blood clots, such as pulmonary embolism, myo
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