Plasma lipoprotein(a) levels in subjects attending a metabolic ward. Discrimination between individuals with and without a history of ischemic stroke.
In this cross-sectional study we compared the abilities of lipoprotein(a) [Lp(a)], plasminogen activator inhibitor-1 (PAI-1), and tissue plasminogen activator (TPA) to discriminate between individuals with and without a history of stroke from among subjects in a metabolic ward. A total of 210 subjects (108 men and 102 women; mean age, 63.8 years; range, 31 to 86 years) provided plasma and DNA samples for the study. Of these, 51 men and 50 women had a history of ischemic stroke. The 109 subjects without a history of stroke were compared with those with such a history for major risk factors for ischemic events. Mean plasma TPA and PAI-1 levels significantly (P < .001) discriminated among subjects younger than 70 years with a history of stroke. The mean plasma Lp(a) level of stroke subjects (21.9 mg/dL) did not differ significantly from that of control subjects (15.2 mg/dL). However, among individuals < 70 years old, Lp(a) plasma levels > 50 mg/dL were more common among stroke patients (8 with versus 1 without, P < .01 by chi 2 test). A molecular variation in the 5' flanking region of the apo(a) gene that has been related to elevated Lp(a) plasma levels (G/A-914) was not strongly correlated with circulating levels of Lp(a), nor did Lp(a) levels correlate with a polymorphism of the apo(a) gene (G/A-21), which is strongly linked (P < .001) to the G/A-914 variation. In this setting, the relation between Lp(a) and cerebral ischemia appears to be limited to individuals below 70 years with elevated (> 50 mg/dL) plasma levels of the lipoprotein.
Margaglione
M
M
Clinical Medica, Istituto di Medicina Interna e Malattie Dismetaboliche, Napoli, Italy.
DiMinno
G
G
Grandone
E
E
Celentano
E
E
Vecchione
G
G
Cappucci
G
G
Grilli
M
M
Mancini
F P
FP
Postiglione
A
A
Panico
S
S
Mancini
M
M
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001054:Apolipoproteins A / Q000235:genetics; D001483:Base Sequence; D002545:Brain Ischemia / Q000097:blood*; D005260:Female; D006801:Humans; D017270:Lipoprotein(a) / Q000097:blood*; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D017395:Plasminogen Activator Inhibitor 1 / Q000097:blood; D012150:Polymorphism, Restriction Fragment Length; D010959:Tissue Plasminogen Activator / Q000097:blood
D001054:Apolipoproteins A; D017270:Lipoprotein(a); D017395:Plasminogen Activator Inhibitor 1; D010959:Tissue Plasminogen Activator