title: Natural coagulation inhibitory proteins and activated protein C resistance in Turkish patients with inflammatory bowel disease.
abstract: OBJECTIVE
  Thromboembolic events are a rare but significant complication of inflammatory bowel disease. The aim of this study was to investigate the level of natural coagulation inhibitors and activated protein C resistance in Turkish patients with inflammatory bowel disease.
  
  
  METHODS
  Fifty patients (29 male, 21 female) without venous thrombosis history and 37 healthy controls were included in the study. Erythrocyte sedimentation rate, C-reactive protein, thrombocyte count, prothrombin time, activated partial thromboplastin time, fibrinogen concentration, von Willebrand factor antigen, factor VIII activity, activated protein C resistance, functional levels of antithrombin III, protein C and protein S were measured. Patients and controls with activated protein C resistance were further studied using a polymerase chain reaction assay for factor V Leiden mutation.
  
  
  RESULTS
  There was no significant difference between patients and the controls in terms of antithrombin III, protein C, protein S, factor (F) VIII and Willebrand factor levels. The mean thrombocyte counts, fibrinogen levels, and Willebrand factor levels were found to be significantly higher in patients who were in the active period of the disease than in controls and patients in remission. No significant difference was observed in those showing activated protein C resistance and factor V Leiden mutation between patients and controls.
  
  
  CONCLUSIONS
  The presence of inherited thrombophilic defects, in particular activated protein C resistance and natural coagulation inhibitor deficiency, is uncommon in Turkish patients with inflammatory bowel disease in both active and remission periods. As a result, a controlled study in inflammatory bowel disease patients with thrombosis history is recommended.
authors.affiliation: Hematology Division, Department of Internal Medicine, Atatürk Research and Training Hospital, Izmir, Turkey. b.payzin@superonline.com
authors.forename: Bahriye
authors.initials: B
authors.lastname: Payzin
authors.forename: F Yeşim
authors.initials: FY
authors.lastname: Adakan
authors.forename: H Cahit
authors.initials: HC
authors.lastname: Yalçin
authors.forename: Gülbin S
authors.initials: GS
authors.lastname: Cetinkaya
authors.forename: Sibel
authors.initials: S
authors.lastname: Berkmen
authors.forename: Sibel
authors.initials: S
authors.lastname: Eraslan
authors.forename: Belkis
authors.initials: B
authors.lastname: Unsal
mesh_terms: D020016:Activated Protein C Resistance / Q000097:blood* / Q000235:genetics; D000293:Adolescent; D000328:Adult; D000368:Aged; D015415:Biomarkers / Q000097:blood; D019774:Blood Coagulation Factor Inhibitors / Q000097:blood* / Q000145:classification; D001779:Blood Coagulation Factors / Q000145:classification / Q000378:metabolism; D001792:Blood Platelets / Q000378:metabolism; D001799:Blood Sedimentation; D002097:C-Reactive Protein / Q000378:metabolism; D016022:Case-Control Studies; D005165:Factor V / Q000235:genetics; D005260:Female; D006801:Humans; D015212:Inflammatory Bowel Diseases / Q000097:blood*; D008297:Male; D008875:Middle Aged; D010314:Partial Thromboplastin Time; D017354:Point Mutation; D016133:Polymerase Chain Reaction; D011517:Prothrombin Time; D012075:Remission, Spontaneous; D014421:Turkey / Q000453:epidemiology
chemical_list: D015415:Biomarkers; D019774:Blood Coagulation Factor Inhibitors; D001779:Blood Coagulation Factors; C095381:factor V Leiden; D005165:Factor V; D002097:C-Reactive Protein