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OBJECTIVE Considering that elevated blood levels of homocyst(e)ine represent a known independent risk factor for macrovascular disease, we assessed the link between hyperhomocyst(e)inemia and diabetic microvascular complications. METHODS Homocyst(e)ine and thrombomodulin plasma levels, a marker of endothelial cell damage, were measured before and 3 h after oral methionine loading in 75 patients with stable, well-controlled IDDM and 40 healthy control subjects matched for sex and age. Exclusion criteria were hyperlipidemia, hypertension, smoking, or positive family history for cardiovascular disease. RESULTS IDDM patients had higher pre- and postload homocyst(e)ine plasma levels than did healthy control subjects (12.0 vs. 7.7 mumol/l and 27.6 vs. 16.0 mumol/l; P < 0.001). Of 75 IDDM patients, 26 had homocyst(e)ine plasma levels above the normal range (defined as mean +2 SD of values obtained in the control group). The IDDM patients with hyperhomocyst(e)inemia had higher thrombomodulin plasma levels (62.2 vs. 38.2 ng/ml; P < 0.001), higher albumin excretion rates (485 vs. 115 mg/l; P < 0.005), and a higher prevalence of late diabetic complications (nephropathy, 76 vs. 33%; retinopathy, 69 vs. 51%; neuropathy, 57 vs. 41%; macroangiopathy, 57 vs. 33%) compared with IDDM patients with normal plasma homocyst(e)ine. In vitro experiments with human umbilical vein cells show an increased release of thrombomodulin into the culture supernatant only when endothelial cells were pretreated with advanced glycation end product (AGE)-albumin before L-homocystine was added. A synergistic action of homocyst(e)ine and AGEs might contribute to vascular complications of patients with diabetes. CONCLUSIONS Hyperhomocyst(e)inemia is common in nephropathic diabetic patients and may contribute to the enhanced morbidity and mortality from cardiovascular diseases characteristically observed in IDDM patients with diabetic nephropathy.
M A Hofmann, and
B Kohl, and
M S Zumbach, and
V Borcea, and
A Bierhaus, and
M Henkels, and
J Amiral, and
A M Schmidt, and
W Fiehn, and
R Ziegler, and
P Wahl, and
P P Nawroth
August 2000,
The Journal of clinical investigation,
M A Hofmann, and
B Kohl, and
M S Zumbach, and
V Borcea, and
A Bierhaus, and
M Henkels, and
J Amiral, and
A M Schmidt, and
W Fiehn, and
R Ziegler, and
P Wahl, and
P P Nawroth
February 2000,
Current treatment options in cardiovascular medicine,
M A Hofmann, and
B Kohl, and
M S Zumbach, and
V Borcea, and
A Bierhaus, and
M Henkels, and
J Amiral, and
A M Schmidt, and
W Fiehn, and
R Ziegler, and
P Wahl, and
P P Nawroth
August 2003,
Circulation,
M A Hofmann, and
B Kohl, and
M S Zumbach, and
V Borcea, and
A Bierhaus, and
M Henkels, and
J Amiral, and
A M Schmidt, and
W Fiehn, and
R Ziegler, and
P Wahl, and
P P Nawroth
October 1997,
Circulation,
M A Hofmann, and
B Kohl, and
M S Zumbach, and
V Borcea, and
A Bierhaus, and
M Henkels, and
J Amiral, and
A M Schmidt, and
W Fiehn, and
R Ziegler, and
P Wahl, and
P P Nawroth
March 2000,
Circulation,
M A Hofmann, and
B Kohl, and
M S Zumbach, and
V Borcea, and
A Bierhaus, and
M Henkels, and
J Amiral, and
A M Schmidt, and
W Fiehn, and
R Ziegler, and
P Wahl, and
P P Nawroth
April 1997,
Annals of the New York Academy of Sciences,
M A Hofmann, and
B Kohl, and
M S Zumbach, and
V Borcea, and
A Bierhaus, and
M Henkels, and
J Amiral, and
A M Schmidt, and
W Fiehn, and
R Ziegler, and
P Wahl, and
P P Nawroth
November 2002,
Archives of pathology & laboratory medicine,
M A Hofmann, and
B Kohl, and
M S Zumbach, and
V Borcea, and
A Bierhaus, and
M Henkels, and
J Amiral, and
A M Schmidt, and
W Fiehn, and
R Ziegler, and
P Wahl, and
P P Nawroth
August 2001,
Clinical chemistry and laboratory medicine,
M A Hofmann, and
B Kohl, and
M S Zumbach, and
V Borcea, and
A Bierhaus, and
M Henkels, and
J Amiral, and
A M Schmidt, and
W Fiehn, and
R Ziegler, and
P Wahl, and
P P Nawroth
July 1996,
The Journal of clinical investigation,
M A Hofmann, and
B Kohl, and
M S Zumbach, and
V Borcea, and
A Bierhaus, and
M Henkels, and
J Amiral, and
A M Schmidt, and
W Fiehn, and
R Ziegler, and
P Wahl, and
P P Nawroth
September 1999,
Circulation,
