Data came out over the weekend in Advance of the American College of Cardiology meeting in Chicago. The article reviews the Focus-CCTRN trial which uses autologous bone marrow to treat heart disease in a Phase II trial.  Specifically the trial evaluates the injection of bone marrow in ischemic cardiomyopathy.   This trial is similar to what Baxter is working on in their phase III trial using not bone marrow but what they believe is the active cell in marrow, CD 34+ cells. Incidentally this is similar to what NeoStem is doing with the Phase II Amorcyte Heart Attack “PRESERVE” trial which is using IRA (Infarct related artery) injection of CD 34+ cells (NeoStem is also doing the manufacturing for Baxter).
 
The results of the study are fascinating. They showed that the greatest efficacy was shown in those patients who received the greatest number of CD 34 cells.
 
Specifically the article states: 

"A regression analysis showed that higher CD34 cell or CD133 cell counts were associated with greater absolute unit increase in LVEF. The range of CD34 was 0.5% to 6.9% (SD, 1.2%). Assuming that differences of 1.96 for SD or 2.4% are more likely due to biological variability, the effect of differences in CD34 cell level beyond that expected due to natural variability was examined, using a 3% level to be conservative. Every 3% higher level of CD34 cells was associated with on average a 3.0% greater absolute unit increase in LVEF in a multiple variable model that included age and treatment as predictor variables (3.06 [95% CI, 0.14-5.98];P=.04)."

This article seems to confirm what NeoStem’s Chief Medical officer, Andrew Pecora MD, and Phase II Trial Investigator, Arshed Quyyumi MD, FRCP wrote in their Letter to the editor (Published in JAMA, March 14, 2012) that reviews the results from another Bone Marrow Trial (The Late TIME trial) that was presented last Fall at the American Heart Association (AHA).

“In the Late TIME trial, treated patients received a median CD34 cell dose of 3.8±1.5x106 cells, well below 10x106 CD34 cells. Additionally, in vitro SDF-1 mobility of the infused cells was not measured and may have been adversely affected by the absence of autologous serum in the infused product. Future studies must account for the quantity and mobility of infused (potent) cells before conclusions regarding efficacy are made.”

Daily Dose Conclusion: A lot of work has been done with Bone Marrow cells and its all shown trends but there have not been any home runs. The data seems to be pointing to the active ingredient (there may be more than one, that’s for sure) is CD 34+ cells. Patinets with greater numbers of these cells  are showing efficacy. The Amorcyte Phase 1 data was very compelling showing a statistically valid correlation between the number of CD 34 + CXCR4+ cells and the effect on both perfusion and infarct size. The fact that Baxter is also pursuing a CD 34+ cell approach is validating. The trial is being run by Dr. Doug Losordo  who is considered a Key Opinion Leader (KOL) and Pioneer in cell therapy. Dr. Losordo’s team last summer published the results of experiments that showed that among all the various cells present in marrow, it is the CD 34+ cells that generate the greatest amount of blood vessel growth.