Persistence of Increased Cardiovascular Risk in Patients with Cushings Disease after Five Years of Successful Cure
Annamaria Colao,
Rosario Pivonello,
Stefano Spiezia,
Antongiulio Faggiano,
Diego Ferone,
Mariagiovanna Filippella,
Paolo Marzullo,
Gaetana Cerbone,
Marcello Siciliani and
Gaetano Lombardi
Department of Molecular and Clinical Endocrinology and Oncology,
Federico II University (A.C., R.P., A.F., D.F., M.F., P.M., G.C., G.L.)
and Echo-Guided Surgery Unit, S. Maria del Popolo degli Incurabili
Hospital (S.S., M.S.), Naples, Italy
Address all correspondence and requests for reprints to: Annamaria Colao, M.D., Ph.D., Department of Molecular and Clinical Endocrinology and Oncology, Federico II University of Naples, Via Sergio Pansini 5, 80131 Naples, Italy. E-mail: colao{at}unina.it
Patients with Cushings disease (CD) mainly die becauseof
cardiovascular accidents. The aim of this study was to evaluatewhether
patients with CD still have increased cardiovascularrisk and suffer
from premature atherosclerosis once cured.
Fifteen patients cured from CD for a long term period (5 yr),30 sex-
and age-matched controls, and 30 body mass index (BMI)-matchedcontrols
were included in this study. BMI; waist to hip ratio(WHR); systolic
(SBP) and diastolic (DBP) blood pressures; serumtotal, low density
lipoprotein (LDL), and high density lipoprotein(HDL) cholesterol;
serum triglycerides, fibrinogen, and lipoprotein(a)levels; prothrombin
time; activated partial thromboplastinetime; and basal and glucose
load-stimulated insulin and glucoselevels were measured in patients
and controls. By echo-Dopplerultrasonography, the intima media
thickness (IMT), systolicand diastolic media-media distances, blood
systolic (SPV) anddiastolic (DPV) peak velocity, systolic (SLD) and
diastolic(DLD) lumen diameter, and distensibility coefficient (DC)
weremeasured at both common carotid arteries where the presence,size,
and location of atherosclerotic plaques were also evaluated.
Compared with a sex- and age-matched control population, CDpatients
had BMI (P < 0.001), WHR (P <
0.001), SBP (P< 0.005), DBP
(P < 0.05), fasting glucose (P
< 0.001)and insulin (P < 0.05), glucose
load-stimulated glucose andinsulin levels (P <
0.05), total cholesterol (P < 0.05),LDL
cholesterol (P < 0.01), fibrinogen
(P < 0.01), andlipoprotein(a)
(P < 0.05) levels higher and HDL cholesterol
levels(P < 0.05) lower than controls. At
ultrasonography, in thepatients, IMT (P < 0.05),
SPV (P < 0.05) and DPV (P <
0.001)were significantly increased whereas SLD
(P < 0.001), DLD(P < 0.001),
and DC (P < 0.05) were significantly decreased
comparedto controls. In addition, CD patients had higher WHR
(P <0.05), DBP (P < 0.05),
glucose load-stimulated glucose andinsulin levels
(P < 0.05), and fibrinogen levels
(P <0.01) and lower HDL cholesterol
(P < 0.05) levels than BMI-matchedcontrols. At
ultrasonography, increased common carotid arteriesIMT
(P < 0.05) and DPV (P < 0.05)
and decreased DLD (P< 0.05) and DC
(P < 0.05) were measured in patients comparedto
those in BMI-matched controls. Atherosclerotic plaques werefound in
26.7% of patients, in none of the sex- and age-matchedcontrols, and
in 3.3% of the BMI-matched controls. In CD patients,a significant
correlation was found between both WHR and fastingserum insulin levels
and DBP (r = 0.52 and r = 0.55; P <
0.05),triglycerides levels (r = 0.56 and r = 0.77;
P < 0.05), andIMT (r = 0.64 and r =
0.56; P < 0.05). Right (r = -0.70;
P< 0.005) and left (r = -0.65;
P < 0.01) DC were inverselycorrelated to the
duration of CD in the patient group. At themultiple regression
analysis, WHR was the best predictor offasting insulin levels
(ß = 0.77; P < 0.05), and vice
versa,fasting insulin level was the best predictor of WHR
(ß= 1.20; P < 0.05).
In conclusion, patients cured from CD for a long term periodhave a
high prevalence of atherosclerosis and maintain increasedseveral
cardiovascular risk factors of the active disease, probablydue to a
residual abdominal obesity and/or insulin resistancesyndrome.
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