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2015 ; 10
(10
): e0141464
Nephropedia Template TP
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A Potential Mechanism of High-Dose Ticagrelor in Modulating Platelet Activity and
Atherosclerosis Mediated by Thymic Stromal Lymphopoietin Receptor
#MMPMID26517374
Mao Y
; Peng Y
; Zeng Q
; Cheng L
; Wang B
; Mao X
; Meng K
; Liu Y
; Lian Y
; Li D
PLoS One
2015[]; 10
(10
): e0141464
PMID26517374
show ga
Abnormal expression of thymic stromal lymphopoietin (TSLP) and its receptor
(TSLPR) was found in patients with acute coronary syndrome. Ticagrelor, an oral
platelet ADP P2Y12 receptor antagonist, is widely used in these patients. The aim
of this study was to verify whether different doses of ticagrelor regulated
plaque progression and platelet activity by modulating TSLP/TSLPR. Seventy-five
ApoE-/- mice were randomly divided into five groups: (1) high-cholesterol diet
(HCD, n = 15); (2) HCD plus ticagrelor 25 mg/kg/d (T1, n = 15); (3) HCD plus
ticagrelor 50 mg/kg/d (T2, n = 15); (4) HCD plus ticagrelor 100 mg/kg/d (T3, n =
15); and (5) a normal diet group (ND, n = 15). At day 0 and at week 16, blood
lipids and serum TSLP levels, expression of TSLPR, CD62, and CD63, platelet
aggregation, platelet ATP release, PI3K/Akt signaling pathway, and plaque
morphology were assessed. HCD increased TSLPR expression and atherosclerosis
progression but high-dose ticagrelor (100 mg/kg) moderated this trend. TSLPR was
positively correlated with Akt1, platelet aggregation, corrected plaque area, and
vulnerability index in the T3 group (P<0.01). In conclusion, low-dose ticagrelor
only inhibited platelet activity. Besides this inhibition, high-dose ticagrelor
modulated platelet activity and atherosclerosis mediated by TSLPR, potentially
through the PI3K/Akt signal pathway.