News | Stem Cell Therapies | May 16, 2016

Stem Cell Therapy Shows Potential for Difficult-to-Treat RA Patient Population

Late-breaker study presented at SCAI 2016

May 16, 2016 — A study using a stem cell therapy to treat challenging refractory angina (RA) patients demonstrated promising results, including improvement exercise time, reduced angina and reduced mortality. The RENEW results were presented as a late-breaking clinical trial at the 2016 Society for Cardiovascular Angiography and Interventions (SCAI) annual meeting.

RA, also known as chronic symptomatic coronary artery disease, impacts an increasing number of people. Due to inadequate blood supply from severe blockages, many experience ongoing chest pain, shortness of breath, fatigue and have limited treatment options. 

RENEW was designed to determine the effectiveness of granulocyte-colony stimulating factor (G-CSF) mobilized CD34+ stem cells (CD34+) to treat RA patients. G-CSF triggers the bone marrow to produce white blood cells and stem cells and release them into the bloodstream. CD34+ are a specific type of stem cells that have been shown to increase blood flow in pre-clinical models. 

“Clinicians are seeing more RA patients because people are living longer,” said Timothy D. Henry, M.D., MSCAI, director, division of cardiology at the Cedars-Sinai Heart Institute, Los Angeles, Calif., and the study’s co-principal investigator. “Unfortunately, despite better medical care, these people are still confronting ongoing symptoms that affect their daily lives.” 

The patients had class III or IV angina on maximally tolerated medical management, had at least seven episodes of chest pain per week, were not candidates for revascularization and whose treadmill exercise time was between three to 10 minutes. Patients were randomized into three groups: 28 to open-label standard of care (SOC), 27 to blinded placebo injections, (PL) and 57 received treatment with CD34+ cells. The researchers assessed treadmill exercise time and angina frequency at three, six and 12 months and major adverse cardiac events (MACE) for up to two years. 

Exercise time for cell-treated patients increased by more than two minutes at three months (122 seconds), six months (142 seconds) and 12 months (124 seconds). This group also experienced a 40 percent decrease (relative risk 0.57) of angina at six months when compared to the PL group. 

At two years, the CD34+ cell group saw lower rates of mortality (3.7 percent) when compared with PL (10 percent) and SOC (7.1 percent). Further, the study found higher rates of MACE after two years for SOC (68 percent) patients vs. CD34+ cell (46 percent) and PL (43 percent) patients. “Cell therapy appears to be a promising approach for these patients who have few options,” Henry said. “Our results were consistent with phase 2 results from the ACT34 trial.” 

While the investigators aim was to include 444 RA patients, final results are based on 112, because the trial was prematurely terminated by the sponsor due to financial considerations. “It is unfortunate the early termination of this study precludes a full evaluation of the efficacy of this therapy for these patients with very few options,” said Tom Povsic, M.D., FSCAI, co-principal investigator, associate professor at the Duke Clinical Research Institute (DCRI) and an interventional cardiologist at Duke University School of Medicine, Durham, N.C. “Studies like RENEW are critical to developing reliable and effective cellular therapies for heart patients, and continued funding is essential to advancing the work that this study began. We need to find a way to bring these therapies to patients as quickly and safely as possible.” 

Henry reported as co-principal investigator and Steering Committee member he received modest support from Baxter. Baxter provided the DCRI, of which Povsic is an employee, research support to conduct this study. The study was sponsored by Baxter.

For more information: www. 


Related Content

Teleflex Launches Next-Generation Sympro Elite and Expro Elite Snares
Technology | Cath Lab | February 07, 2018
Teleflex Inc. has announced 510(k) clearance by the U.S. Food and Drug Administration (FDA) and U.S. commercial launch...
SCAI Advocacy Committee Highlights Reimbursement Reform Efforts in 2017
News | Cath Lab | January 30, 2018
The Society for Cardiovascular Angiography and Interventions (SCAI) highlighted the efforts of its Advocacy Committee...
IAC Releases Cardiovascular Catheterization Accreditation Program
News | Cath Lab | January 25, 2018
January 25, 2018 – The Intersocietal Accreditation Commission (IAC) announced the release of its Cardiovascular Cathe
Videos | Cath Lab | January 04, 2018
Bernadette Speiser, BSN, MSN, CCRN, RCIS, a cardiac cath/EP nurse at Palo Alto Veterans Hospital, Palo Alto, Calif.,
FDA Initiates Class I Recall of Sterilmed Reprocessed Agilis Steerable Introducer Sheath
News | Cath Lab | January 04, 2018
The U.S. Food and Drug Administration (FDA) announced a Class I recall of Sterilmed’s Agilis Steerable Introducer...
The California Heart & Vascular Clinic in El Centro, Calif., treated the first post-FDA clearance patient with a DABRA atherectomy system. Athar Ansari, M.D.

The California Heart & Vascular Clinic in El Centro, Calif., treated the first post-FDA clearance patient with a DABRA system. 

Feature | Cath Lab | November 24, 2017 | Athar Ansari, M.D., FACC
As debates about the current state and future of healthcare rage in Congress, the media and healthcare settings acros
Videos | Cath Lab | November 08, 2017
Juan Granada, M.D., Cardiovascular Research Foundation president and chief executive officer, shares his insights on
Results of the ORBITA study found no difference in exercise time after six weeks in patients with stable angina who received percutaneous coronary intervention (PCI) versus a placebo treatment. TCT 2017
Feature | Cath Lab | November 06, 2017
November 6, 2017 – Results from ORBITA, a prospective multi-center randomized blinded placebo-controlled study, found
Culprit Lesion-Only PCI Improves Outcomes for Cardiogenic Shock Patients Compared to Multivessel PCI
News | Cath Lab | November 01, 2017
November 1, 2017 — Results from the prospective, randomized, multicenter CULPRIT-SHOCK trial found an initial strateg
Overlay Init