Amyloid beta-protein precursor-rich platelet microparticles in thrombotic disease.
We investigated the association of amyloid beta-protein precursor (APP) and platelet derived microparticles in 20 normal controls and 91 patients with various diseases causing a thrombotic tendency. Compared with the controls, the mean percentage of APP-positive microparticles was significantly greater in the patients with cerebral infarction (39.1 +/- 17.7%, p < 0.001), diabetes (31.1 +/- 12.6%, p < 0.001), and uremia (30.1 +/- 14.7%, p < 0.01), but not in those with hypertension (8.2 +/- 6.3%, p = NS). Sixteen patients with cerebral infarction, 20 with diabetes, and 11 with uremia had microparticles with very high APP levels. In normal controls, 7.2 +/- 3.7% of the microparticles were positive for P-selectin, while the percentage in cerebral infarction, diabetes, uremia, and hypertension was respectively 43.5 +/- 15.1%, 40.0 +/- 12.8%, 31.8 +/- 12.2%, and 11.6 +/- 7.3%. There was a significant correlation between P-selectin and APP positivity of microparticles. Our results suggest that microparticle APP may have a regulatory influence on coagulation abnormalities.
Nomura
S
S
First Department of Internal Medicine, Kansai Medical University, Osaka, Japan.
Komiyama
Y
Y
Miyake
T
T
Miyazaki
Y
Y
Kido
H
H
Suzuki
M
M
Kagawa
H
H
Yanabu
M
M
Takahashi
H
H
Fukuhara
S
S
D016564:Amyloid beta-Protein Precursor / Q000097:blood*; D001792:Blood Platelets / Q000737:chemistry*; D002544:Cerebral Infarction / Q000097:blood*; D048909:Diabetes Complications; D003920:Diabetes Mellitus / Q000097:blood*; D004198:Disease Susceptibility; D015949:Factor IXa / Q000037:antagonists & inhibitors; D065427:Factor Xa Inhibitors; D006801:Humans; D006973:Hypertension / Q000097:blood / Q000150:complications; D019007:P-Selectin; D010980:Platelet Membrane Glycoproteins / Q000097:blood; D013927:Thrombosis / Q000097:blood* / Q000209:etiology; D014511:Uremia / Q000097:blood* / Q000150:complications
D016564:Amyloid beta-Protein Precursor; D065427:Factor Xa Inhibitors; D019007:P-Selectin; D010980:Platelet Membrane Glycoproteins; D015949:Factor IXa