Abstract
Mesenchymal stromal cells (MSCs) can differentiate into multiple tissues. Preclinical studies have shown that MSC-based therapy is a potential new treatment approach for ischemic stroke. These results support the urgent need for further studies of MSC transplantation in the treatment of ischemic stroke in humans. Here, we develop a prospective, randomized, controlled, observer-blinded phase II trial to assess the clinical safety, feasibility, and therapeutic mechanisms of allogenic bone marrow-derived MSCs (BM-MSCs) by intrathecal infusion in the treatment of patients with cerebral infarction within the middle cerebral artery and with a National Institutes of Health Stroke Scale (NIHSS) score from 15 to 25. Sample size calculation has determined that a patient population of 118, with ischemic stroke between 30 and 90 days following onset, will be randomly divided into experimental (n = 59) and control (n = 59) groups. Then eligible patients will receive four intrathecal infusions of allogenic BM-MSCs (1 × 106 cells/kg body weight) once a week. All patients have detailed functional assessments and magnetic resonance imaging prior to cell infusion and at intervals up to 1 year after. The primary outcome is the score on the modified Rankin Scale at 90 days after treatment, and the second outcomes include multiple indicators of safety and feasibility. And this trial has been registered as ChiCTR-INR-16008908 (25 July 2016).
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Funding
The study is funded by the Science and Technology Program of Guangdong province, China (no. 2015A020212018).
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Adverse events and compliance to protocol will be monitored by an independent data monitoring committee, with in-person monitoring visits and phone contacts. The study protocol and information consent forms have been approved by the Ethical Committee of the Sun Yat-sen Memorial Hospital, Sun Yat-sen University. The trial has been registered in the Chinese Clinical Trial Registry (registration number: ChiCTR-INR-16008908; date of approval 25 July 2016). And all patients will be informed verbally and provided with a written document about the study by the investigators.
Conflict of Interest
The authors declare that they have no conflicts of interest.
Ethical Approval
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
Informed Consent
Informed consent was obtained from all individual participants included in the study.
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Significance Statement
This trial is the first to evaluate the safety, feasibility, and therapeutic mechanisms of allogenic BM-MSCs by intrathecal infusion in patients with severe cerebral infarction. This study protocol will provide a high level of evidence and better understanding of allogenic MSC therapy via intrathecal injection in patients with severe ischemic stroke.
Lingna Deng and Qingxia Peng are co-first authors.
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Deng, L., Peng, Q., Wang, H. et al. Intrathecal Injection of Allogenic Bone Marrow-Derived Mesenchymal Stromal Cells in Treatment of Patients with Severe Ischemic Stroke: Study Protocol for a Randomized Controlled Observer-Blinded Trial. Transl. Stroke Res. 10, 170–177 (2019). https://doi.org/10.1007/s12975-018-0634-y
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DOI: https://doi.org/10.1007/s12975-018-0634-y