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Corban MT, Toya T, Albers DP, Sebaali F, Lewis B, Bois JPP, Gulati R, Prasad A, Best PJ, Bell M, Rihal C, Prasad M, Ahmad A, Lerman LO, Solseth ML, Winters JL, Dietz AB, Lerman A. IMPROvE-CED Trial: Intracoronary Autologous CD34+ Cell Therapy for Treatment of Coronary Endothelial Dysfunction in Patients With Angina and Non-Obstructive Coronary Arteries. Circ Res 2021; 130:326-338. [DOI: 10.1161/circresaha.121.319644] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background:
Coronary endothelial dysfunction (CED) causes angina/ischemia in patients with no-obstructive CAD (NOCAD). Patients with CED have decreased number and function of CD34+ cells involved in normal vascular repair with microcirculatory regenerative potential and paracrine anti-inflammatory effects. We evaluated safety and potential efficacy of intracoronary (IC) autologous CD34+ cell therapy for CED.
Methods:
Twenty NOCAD patients with invasively-diagnosed CED and persistent angina despite maximally-tolerated medical therapy (MTMT) underwent baseline exercise stress test (EST), GCSF-mediated CD34+ cell-mobilization, leukapheresis, and selective 1x105 CD34+ cells/kg infusion into LAD. Invasive CED evaluation and EST were repeated 6-months after cell infusion. Primary endpoints were safety and effect of IC autologous CD34+ cell therapy on CED at 6-months follow-up. Secondary endpoints were change in CCS angina class, as-needed sublingual nitroglycerin use/day, Seattle Angina Questionnaire (SAQ) scores, and exercise time at 6-months. Change in CED was compared to that of 51 historic-control NOCAD patients treated with MTMT alone.
Results:
Mean age was 52{plus minus}13 years, 75% women. No death, myocardial infarction, or stroke occurred. IC CD34+ cell infusion improved microvascular CED [% acetylcholine-mediated coronary blood flow increased from 7.2 (-18.0-32.4) to 57.6 (16.3-98.3) %, p=0.014], decreased CCS angina class (3.7{plus minus}0.5 to 1.7{plus minus}0.9, Wilcoxon signed-rank test p=0.00018) and sublingual nitroglycerin use/day [1 (0.4-3.5) to 0 (0-1), Wilcoxon signed-rank test p=0.00047], and improved all SAQ scores with no significant change in exercise time at 6-months follow-up. Historic-control patients had no significant change in CED.
Conclusion:
A single IC autologous CD34+ cell infusion was safe and may potentially be an effective disease-modifying therapy for microvascular CED in humans. Clinical Trial Registration: NCT03471611
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Affiliation(s)
| | - Takumi Toya
- Department of Cardiology, National Defense Medical College, JAPAN
| | | | | | | | | | - Rajiv Gulati
- Cardiovascular Diseases, Mayo Clinic, UNITED STATES
| | | | | | - Malcolm Bell
- Cardiovascular Medicine, Mayo Clinic, UNITED STATES
| | - Charanjit Rihal
- Division of Cardiovascular Diseases, Mayo Clinic, UNITED STATES
| | - Megha Prasad
- Columbia University Medical Center, UNITED STATES
| | | | - Lilach O. Lerman
- Division of Nephrology and Hypertension, Mayo Clinic, UNITED STATES
| | | | | | - Allan B Dietz
- Lab Medicine and Patholgy, Mayo Clinic, UNITED STATES
| | - Amir Lerman
- Department of Cardiovascular Medicine, Mayo Clinic, UNITED STATES
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