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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 PLoS+One
2018 ; 13
(3
): e0193967
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Epidemiological and histological findings implicate matrix Gla protein in
diastolic left ventricular dysfunction
#MMPMID29529056
Wei FF
; Trenson S
; Monney P
; Yang WY
; Pruijm M
; Zhang ZY
; Bouatou Y
; Huang QF
; Ponte B
; Martin PY
; Thijs L
; Kuznetsova T
; Allegaert K
; Janssens S
; Vermeer C
; Verhamme P
; Burnier M
; Bochud M
; Ehret G
; Staessen JA
PLoS One
2018[]; 13
(3
): e0193967
PMID29529056
show ga
OBJECTIVES: A novel paradigm of diastolic left ventricular (LV) dysfunction
proposes involvement of the cardiac microvasculature. Vitamin K dependent matrix
Gla protein (MGP) plays a role in preserving microcirculatory integrity. We
hypothesized that LV filling pressure-a measure of diastolic LV
dysfunction-increases with higher plasma level of inactive
desphospho-uncarboxylated MGP (dp-ucMGP). We also studied the distribution of
active and inactive MGP in human myocardium. METHODS: We measured
echocardiographic diastolic LV function and plasma dp-ucMGP (ELISA) in 668
Flemish and for replication in 386 Swiss. RESULTS: Among Flemish and Swiss, E/e'
(6.78 vs. 6.73) and dp-ucMGP (3.94 ?g/L vs. 4.20 ?g/L) were similarly
distributed. In multivariable-adjusted models, for each doubling of dp-ucMGP,
E/e' increased by 0.26, 0.33 and 0.31 in Flemish, Swiss and both cohorts combined
(P?0.026); the odds ratios for having E/e' ? 8.5 were 1.99, 3.29 and 2.36,
respectively (P?0.017). Cardiac biopsies from patients with ischemic or dilated
cardiomyopathy and healthy hearts (n = 4 for each) were stained with
conformation-specific MGP antibodies. In diseased compared with normal hearts,
uncarboxylated inactive MGP was more prevalent (P?0.004) in the perivascular
matrix and interstitium (204.4 vs. 8.6 ?m2 per field) and phosphorylated active
MGP in and around capillaries and interstitial cells (31.3 vs. 6.6 number of
positive capillaries and cells per field). CONCLUSIONS: Our study supports a role
of activated MGP in maintaining myocardial integrity and diastolic LV performance
and can potentially be translated into new strategies for managing diastolic LV
dysfunction and preventing its progression to heart failure.