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Published in: Basic Research in Cardiology 2/2024

18-01-2024 | Original Contribution

Lysophosphatidic acid contributes to myocardial ischemia/reperfusion injury by activating TRPV1 in spinal cord

Authors: Chao Wu, Meiyan Sun, Muge Qile, Yu Zhang, Liu Liu, Xueying Cheng, Xiaoxiao Dai, Eric R. Gross, Ye Zhang, Shufang He

Published in: Basic Research in Cardiology | Issue 2/2024

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Abstract

Lysophosphatidic acid (LPA) is a bioactive phospholipid that plays a crucial role in cardiovascular diseases. Here, we question whether LPA contributes to myocardial ischemia/reperfusion (I/R) injury by acting on transient receptor potential vanilloid 1 (TRPV1) in spinal cord. By ligating the left coronary artery to establish an in vivo I/R mouse model, we observed a 1.57-fold increase in LPA level in the cerebrospinal fluid (CSF). The I/R-elevated CSF LPA levels were reduced by HA130, an LPA synthesis inhibitor, compared to vehicle treatment (4.74 ± 0.34 vs. 6.46 ± 0.94 μg/mL, p = 0.0014). Myocardial infarct size was reduced by HA130 treatment compared to the vehicle group (26 ± 8% vs. 46 ± 8%, p = 0.0001). To block the interaction of LPA with TRPV1 at the K710 site, we generated a K710N knock-in mouse model. The TRPV1K710N mice were resistant to LPA-induced myocardial injury, showing a smaller infarct size relative to TRPV1WT mice (28 ± 4% vs. 60 ± 7%, p < 0.0001). Additionally, a sequence-specific TRPV1 peptide targeting the K710 region produced similar protective effects against LPA-induced myocardial injury. Blocking the K710 region through K710N mutation or TRPV1 peptide resulted in reduced neuropeptides release and decreased activity of cardiac sensory neurons, leading to a decrease in cardiac norepinephrine concentration and the restoration of intramyocardial pro-survival signaling, namely protein kinase B/extracellular regulated kinase/glycogen synthase kinase-3β pathway. These findings suggest that the elevation of CSF LPA is strongly associated with myocardial I/R injury. Moreover, inhibiting the interaction of LPA with TRPV1 by blocking the K710 region uncovers a novel strategy for preventing myocardial ischemic injury.
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Metadata
Title
Lysophosphatidic acid contributes to myocardial ischemia/reperfusion injury by activating TRPV1 in spinal cord
Authors
Chao Wu
Meiyan Sun
Muge Qile
Yu Zhang
Liu Liu
Xueying Cheng
Xiaoxiao Dai
Eric R. Gross
Ye Zhang
Shufang He
Publication date
18-01-2024
Publisher
Springer Berlin Heidelberg
Published in
Basic Research in Cardiology / Issue 2/2024
Print ISSN: 0300-8428
Electronic ISSN: 1435-1803
DOI
https://doi.org/10.1007/s00395-023-01031-z

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