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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 Basic+Res+Cardiol
2017 ; 112
(3
): 20
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
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English Wikipedia
Complement factor 5 blockade reduces porcine myocardial infarction size and
improves immediate cardiac function
#MMPMID28258298
Pischke SE
; Gustavsen A
; Orrem HL
; Egge KH
; Courivaud F
; Fontenelle H
; Despont A
; Bongoni AK
; Rieben R
; Tønnessen TI
; Nunn MA
; Scott H
; Skulstad H
; Barratt-Due A
; Mollnes TE
Basic Res Cardiol
2017[May]; 112
(3
): 20
PMID28258298
show ga
Inhibition of complement factor 5 (C5) reduced myocardial infarction in animal
studies, while no benefit was found in clinical studies. Due to lack of
cross-reactivity of clinically used C5 antibodies, different inhibitors were used
in animal and clinical studies. Coversin (Ornithodoros moubata complement
inhibitor, OmCI) blocks C5 cleavage and binds leukotriene B4 in humans and pigs.
We hypothesized that inhibition of C5 before reperfusion will decrease infarct
size and improve ventricular function in a porcine model of myocardial
infarction. In pigs (Sus scrofa), the left anterior descending coronary artery
was occluded (40 min) and reperfused (240 min). Coversin or placebo was infused
20 min after occlusion and throughout reperfusion in 16 blindly randomized pigs.
Coversin significantly reduced myocardial infarction in the area at risk by 39%
(p = 0.03, triphenyl tetrazolium chloride staining) and by 19% (p = 0.02) using
magnetic resonance imaging. The methods correlated significantly (R = 0.92,
p < 0.01). Tissue Doppler echocardiography showed increased systolic displacement
(31%, p < 0.01) and increased systolic velocity (29%, p = 0.01) in coversin
treated pigs. Interleukin-1? in myocardial microdialysis fluid was significantly
reduced (31%, p < 0.05) and tissue E-selectin expression was significantly
reduced (p = 0.01) in the non-infarcted area at risk by coversin treatment.
Coversin ablated plasma C5 activation throughout the reperfusion period and
decreased myocardial C5b-9 deposition, while neither plasma nor myocardial LTB4
were significantly reduced. Coversin substantially reduced the size of
infarction, improved ventricular function, and attenuated interleukin-1? and
E-selectin in this porcine model by inhibiting C5. We conclude that inhibition of
C5 in myocardial infarction should be reconsidered.