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Morin Attenuated Cerebral Ischemia/Reperfusion Injury Through Promoting Angiogenesis Mediated by Angiopoietin-1-Tie-2 Axis and Wnt/β-Catenin Pathway

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Abstract

Cerebral damage following cerebral ischemia/reperfusion injury affects the neurological deficits and motor impairment of stroke patients in the long-term period. Angiogenesis, the essential process for restoration of cerebral blood flow (CBF) in the ischemic brain, promotes the recovery of neurological function following ischemia. The aim of this study was to investigate the long-term effects of morin on angiogenesis and functional outcomes in a middle cerebral artery occlusion (MCAO) and reperfusion model. Male Wistar rats were subjected to MCAO, and they were administered 30 mg/kg of morin at reperfusion via i.p. injection daily for 14 days. Fourteen days after I/R injury, the rats were evaluated for the brain damage, and angiogenic factors involved in Ang1/Tie-2 and Wnt/β-catenin signaling. In addition, at 1, 7, and 14 days after reperfusion, rotarod and pole tests were performed to investigate the functional recovery. We found morin significantly reduced the infarct size, blood–brain barrier (BBB) leakage, and apoptotic cells at 14 days after I/R injury. It also promoted angiogenesis via boosting the expression of angiogenic proteins, such as angiopoietin 1 (Ang1), Tie-2, Wnt3α, β-catenin, and cyclin D1. Morin-mediated angiogenesis was confirmed by a significant increase in microvessel’s density in the penumbra area and an increase in von Willebrand factor (vWF) protein expression of the morin-treated rats. Moreover, the rotarod and pole tests also demonstrated morin increased functional recovery in the morin-treated rats compared to the vehicle rats. Therefore, our data exposed that morin promotes angiogenesis and improves functional outcomes in MCAO and reperfusion rats.

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Abbreviations

Ang1:

Angiopoietin 1

BBB:

Blood-brain barrier

HIF-1α:

Hypoxia-inducible factor 1-alpha

I/R:

Ischemia/reperfusion

MCAO:

Middle cerebral artery occlusion

NRP-1:

Neuropilin-1

ROS:

Reactive oxygen species

t-PA:

Tissue-plasminogen activator

TTC:

2,3,5-Triphenyltetrazolium chloride

VEGF:

Vascular endothelial growth factor

VEGFR:

Vascular endothelial growth factor receptor

vWF:

Von Willebrand factor

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Acknowledgements

This study was supported by Chiang Mai University, Center for Research and Development of Natural Products for Health, Faculty of Medicine, Chiang Mai University grant no. 39/2564, The Thailand Research Fund (DBG6180030), the Center of Excellence for Innovation in Chemistry, Ministry of Higher Education, Science, Research and Innovation, and the Royal Golden Jubilee Ph.D. Program (PHD/0011/2558 SK).

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Conceptualization: Satchakorn Khamchai, Jiraporn Tocharus; Methodology: Satchakorn Khamchai, Wijitra Chumboatong, Janejira Hata, Chainarong Tocharus, Apichart Suksamrarn; Formal analysis and investigation: Satchakorn Khamchai, Jiraporn Tocharus; Writing-original draft preparation: Satchakorn Khamchai; Writing-review and editing: Jiraporn Tocharus, Apichart Suksamrarn; Funding acquisition: Jiraporn Tocharus, Apichart Suksamrarn; Supervision: Jiraporn Tocharus.

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Correspondence to Jiraporn Tocharus.

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Khamchai, S., Chumboatong, W., Hata, J. et al. Morin Attenuated Cerebral Ischemia/Reperfusion Injury Through Promoting Angiogenesis Mediated by Angiopoietin-1-Tie-2 Axis and Wnt/β-Catenin Pathway. Neurotox Res 40, 14–25 (2022). https://doi.org/10.1007/s12640-021-00470-7

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  • DOI: https://doi.org/10.1007/s12640-021-00470-7

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