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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 Front+Pharmacol
2017 ; 8
(ä): 645
Nephropedia Template TP
Ahmed N
; Linardi D
; Muhammad N
; Chiamulera C
; Fumagalli G
; Biagio LS
; Gebrie MA
; Aslam M
; Luciani GB
; Faggian G
; Rungatscher A
Front Pharmacol
2017[]; 8
(ä): 645
PMID28966593
show ga
Background and Objective: Sphingosine 1-phosphate (S1P), and S1P receptor
modulator fingolimod have been suggested to play important cardioprotective role
in animal models of myocardial ischemia/reperfusion injuries. To understand the
cardioprotective function of S1P and its mechanism in vivo, we analyzed
apoptotic, inflammatory biomarkers, and myocardial fibrosis in an in vivo
heterotopic rat heart transplantation model. Methods: Heterotopic heart
transplantation is performed in 60 Sprague-Dawley (SD) rats (350-400 g). The
heart transplant recipients (n = 60) are categorized into Group A (control) and
Group B (fingolimod treated 1 mg/kg intravenous). At baseline with 24 h after
heart transplantation, blood and myocardial tissue are collected for analysis of
myocardial biomarkers, apoptosis, inflammatory markers, oxidative stress, and
phosphorylation of Akt/Erk/STAT-3 signaling pathways. Myocardial fibrosis was
investigated using Masson's trichrome staining and L-hydroxyline. Results:
Fingolimod treatment activates both Reperfusion Injury Salvage Kinase (RISK) and
Survivor Activating Factor Enhancement (SAFE) pathways as evident from activation
of anti-apoptotic and anti-inflammatory pathways. Fingolimod treatment caused a
reduction in myocardial oxidative stress and hence cardiomyocyte apoptosis
resulting in a decrease in myocardial reperfusion injury. Moreover, a significant
(p < 0.001) reduction in collagen staining and hydroxyproline content was
observed in fingolimod treated animals 30 days after transplantation
demonstrating a reduction in cardiac fibrosis. Conclusion: S1P receptor
activation with fingolimod activates anti-apoptotic and anti-inflammatory
pathways, leading to improved myocardial salvage causing a reduction in cardiac
fibrosis.