title: Relationship between tissue plasminogen activator, plasminogen activator inhibitor and CT image in chronic subdural hematoma.
abstract: The present study was performed to investigate the relationship between the concentrations of tissue-type plasminogen activator (t-PA) and plasminogen activator inhibitor (PAI) and the CT images in 23 cases of chronic subdural hematomas (SDHs). The concentrations of t-PA and PAI-1 were quantified by enzyme-linked immunosorbent assay (ELISA). Chronic SDHs were divided into five groups according to their appearance on computed tomography: high-density (n = 4), isodensity (n = 8), low-density (n = 5), mixed-density (n = 3), layering (n = 3) types. The volume of hematoma was measured with an image analyzing software program. The concentrations of t-PA were higher in layering (41.2 +/- 0.3 ng/ml, mean +/- standard error of the mean) and high-density (40.0 +/- 1.1 ng/ml) types compared to those of low-density (23.3 +/- 4.1 ng/ml) and iso-density (25.1 +/- 3.7 ng/ml) types. The concentrations of PAI-1 were lower in layering (95.9 +/- 1.0 ng/ml) and high-density (103.4 +/- 34.5 ng/ml) types compared to that of low-density (192.5 +/- 2.6 ng/ml) type. So the ratio between t-PA and PAI-1 (t-PA/PAI) was greater in layering and high-density types. The volume of hematoma was larger in mixed-density and layering types but statistically insignificant. These results presumably suggest that the ratio between t-PA and PAI concentration may contribute to the pathogenesis of the chronic SDH.
authors: Department of Neurosurgery, College of Medicine, Korea University, Seoul, Korea.
authors: D J
authors: DJ
authors: Lim
authors: Y G
authors: YG
authors: Chung
authors: Y K
authors: YK
authors: Park
authors: J H
authors: JH
authors: Song
authors: H K
authors: HK
authors: Lee
authors: K C
authors: KC
authors: Lee
authors: J W
authors: JW
authors: Chu
authors: Y S
authors: YS
authors: Yang
mesh_terms: D000328:Adult; D000368:Aged; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006408:Hematoma, Subdural / Q000378:metabolism*; D006801:Humans; D008297:Male; D008875:Middle Aged; D017395:Plasminogen Activator Inhibitor 1 / Q000032:analysis*; D010959:Tissue Plasminogen Activator / Q000032:analysis*; D014057:Tomography, X-Ray Computed
chemical_list: D017395:Plasminogen Activator Inhibitor 1; D010959:Tissue Plasminogen Activator