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Human Phenotype Ontology
| Preferred Name | Resistance to activated protein C | |
| Synonyms |
Activated protein C resistance |
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| Definitions |
Poor anticoagulant response to activated protein C. A plasma is termed 'APC resistant' when the addition of exogenous APC fails to prolong its clotting time in an activated partial thromboplastin time assay. The protein C pathway is a major anticoagulant mechanism that down-regulates the prothrombin- and intrinsic factor X (FX)-activating complexes via inactivation of their respective cofactors, activated factors V (FVa) and VIII (FVIIIa). Cofactor inactivation occurs by limited proteolysis at certain amino acid positions in FVa and in FVIIIa. These reactions are catalyzed by the serine protease activated protein C (APC) and stimulated by the APC cofactor protein S. Functional defects of the protein C pathway determine a plasma phenotype known as APC resistance, which is a prevalent and important risk factor for venous thrombosis. A plasma is termed 'APC resistant' when the addition of exogenous APC fails to prolong its clotting time in an activated partial thromboplastin time (aPTT) assay. |
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| ID |
http://purl.obolibrary.org/obo/HP_0012175 |
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| comment |
The protein C pathway is a major anticoagulant mechanism that down-regulates the prothrombin- and intrinsic factor X (FX)-activating complexes via inactivation of their respective cofactors, activated factors V (FVa) and VIII (FVIIIa). Cofactor inactivation occurs by limited proteolysis at certain amino acid positions in FVa and in FVIIIa. These reactions are catalyzed by the serine protease activated protein C (APC) and stimulated by the APC cofactor protein S. Functional defects of the protein C pathway determine a plasma phenotype known as APC resistance, which is a prevalent and important risk factor for venous thrombosis. A plasma is termed 'APC resistant' when the addition of exogenous APC fails to prolong its clotting time in an activated partial thromboplastin time (aPTT) assay.
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| creation_date |
2013-02-23T09:54:07Z
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| database_cross_reference |
UMLS:C0600433 SNOMEDCT_US:421527008
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| definition |
Poor anticoagulant response to activated protein C. A plasma is termed 'APC resistant' when the addition of exogenous APC fails to prolong its clotting time in an activated partial thromboplastin time assay.
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| has_exact_synonym |
Activated protein C resistance
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| has_obo_namespace |
human_phenotype
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| id |
HP:0012175
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| label |
Resistance to activated protein C
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| notation |
HP:0012175
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| prefLabel |
Resistance to activated protein C
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