A Study to Assess Epicardial Delivery of XC001 Gene Therapy for Refractory Angina Coronary Treatment (The EXACT Trial)


About this study

The primary purpose of this trial is to determine the safety of XC001 (AdVEGFXC1) in patients who suffer from angina caused by coronary artery disease and have no other treatment options. Subjects in this study will receive one of four intramyocardial doses of XC001 that expresses human vascular endothelial growth factor (VEGF) which induces therapeutic angiogenesis (revascularization).

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Please contact the study team to discuss whether or not you are eligible to participate in a study.

Inclusion Criteria:

  • Males and females, age 18 to 80 years.
  • Diagnosis of chronic angina due to obstructive coronary artery disease that is refractory to drug therapy and unsuitable for revascularization via coronary artery bypass graft or percutaneous coronary intervention.
  • Angina class II-IV based on Canadian Cardiovascular Society Classification of Angina Pectoris.
  • Adequate hematologic (hemoglobin ≥ 10 g/dL, absolute neutrophil count > 1.2 × 10^3 per μL and platelet count ≥ 75,000 per μL), hepatic (alanine aminotransferase and aspartate aminotransferase ≤ 3 x ULN; total bilirubin ≤ 2 x ULN), and renal function (glomerular filtration rate > 29 mL/minute/1.73 m^2).
  • Adequate birth control if of child-bearing potential - Must be willing and able to provide informed consent.

Exclusion Criteria: 

  • ST elevation myocardial infarction (STEMI) or non-ST elevation myocardial infarction (NSTEMI) not requiring revascularization, transmural myocardial infarction or cerebral vascular accident within the past 30 days.
  • New York Heart Association Function Class III or IV or left ventricular ejection fraction < 25% within the 6 weeks prior to the screening visit - HbA1c ≥ 9.5%, SBP <90 or >180 mmHg, DBP >100 mmHg.
  • Other concurrent medical conditions that could jeopardize the safety of the subject or objectives of the study.

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status Contact

Scottsdale/Phoenix, Ariz.

Mayo Clinic principal investigator

F Fortuin, M.D.

Open for enrollment

Contact information:

Sejal Patel B.S.



More information


  • The demonstration that angiogenic growth factors can stimulate new blood vessel growth and restore perfusion in animal models of myocardial ischemia has led to the development of strategies designed for the local production of angiogenic growth factors in patients who are not candidates for conventional revascularization. The results of recent clinical trials of proangiogenesis gene therapy have been disappointing; however, significant limitations in experimental design, in particular in gene transfer strategies, preclude drawing definitive conclusions. In the REVASC study cardiac gene transfer was optimized by direct intramyocardial delivery of a replication-deficient adenovirus-containing vascular endothelial growth factor (AdVEGF121, 4 x 10(10) particle units (p.u.)). Sixty-seven patients with severe angina due to coronary artery disease and no conventional options for revascularization were randomized to AdVEGF121 gene transfer via mini-thoracotomy or continuation of maximal medical treatment. Exercise time to 1 mm ST-segment depression, the predefined primary end-point analysis, was significantly increased in the AdVEGF121 group compared to control at 26 weeks (P=0.026), but not at 12 weeks. As well, total exercise duration and time to moderate angina at weeks 12 and 26, and in angina symptoms as measured by the Canadian Cardiovascular Society Angina Class and Seattle Angina Questionnaire were all improved by VEGF gene transfer (all P-values at 12 and 26 weeks < or =0.001). However, if anything the results of nuclear perfusion imaging favored the control group, although the AdVEGF121 group achieved higher workloads. Overall there was no significant difference in adverse events between the two groups, despite the fact that procedure-related events were seen only in the thoracotomy group. Therefore, administration of AdVEGF121 by direct intramyocardial injections resulted in objective improvement in exercise-induced ischemia in patients with refractory ischemic heart disease. Read More on PubMed

Study Results Summary

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Supplemental Study Information

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