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

Videos | Cath Lab | August 13, 2018
Jeffrey Schussler, M.D., FACC, FSCAI, FSCCT, FACP, interventional cardiologist at Baylor Scott White Heart and Vascul
Shockwave Launches Coronary Intravascular Lithotripsy in Europe
News | Cath Lab | May 30, 2018
Shockwave Medical recently announced the European commercial availability of Intravascular Lithotripsy (IVL) for...
FFR software on the GE Centricity CVIS. A trial from the 2018 EuroPCR meeting showed FFR improves long-term outcomes.
News | Cath Lab | May 29, 2018
May 29, 2018 — Ongoing controversy exists regarding the role of percutaneous coronary intervention (PCI) for stable c
SCAI Updates Consensus on Length of Stay for Percutaneous Coronary Intervention
News | Cath Lab | May 15, 2018
Revised guidelines incorporating new data on discharge criteria for patients undergoing elective percutaneous coronary...
No Benefit Found Using Sodium Bicarbonate, Acetylcysteine to Prevent Kidney Injury, the result of the PRESERVE Trial to prevent acute kidney injury (AKI), presented at SCAI 2018.  #SCAI, #SCAI2018,
Feature | Cath Lab | May 15, 2018
May 15, 2018 – The large-scale, international randomized PRESERVE clinical trial found high-risk patients for renal c
Angiogram of a STEMI patient.
News | Cath Lab | May 15, 2018
May 15, 2018 — A contemporary, real-world analysis shows lower mortality rates when culprit-only intervention is used
Recent Acquisitions Eroding Prices in Billion Dollar European Interventional Cardiology cath lab Market.
Feature | Cath Lab | May 07, 2018 | Simon Trinh and Jeffrey Wong
The European interventional cardiology market is currently valued at nearly $1.4 billion.
Videos | Cath Lab | May 07, 2018
Imran Ahmad, M.D., medical director of interventional cardiology, explains some of the new technologies his labs have
360 Photos | Cath Lab | April 20, 2018
A 360 degree view of the newest cath lab at Northwestern Medicine Central DuPage Hospital in Winfield, Ill., located
SCAI Announces Global Lecture Series for 2018 Scientific Sessions
News | Cath Lab | April 18, 2018
Many of the world’s leading interventional cardiologists and cardiovascular professionals will convene in San Diego,...
Overlay Init