Stemcelldoc's Weblog

February 11, 2009

Criticial Differences in Bone Marrow Derived Stem Cell Therapies

The bone marrow is rich in stem cells.  These cells are typcially obtained by a technique referred to as a  bone marrow aspirate where a needle is placed into  the iliac crest and cells are withdrawn through a syringe.  iliac_crest_model


Bone Marrow Aspirate Concentrate Unit

Withdrawing cells in this fashion is called aspiration.  Bone marrow aspiration is a common practice for obtaining stem cells.  A popular technique is to take the bone marrow aspirate ( the cells obained from the bone marrow aspiration)  and spin it down in a centrifuge thereby creating a concentrate of bone marrow nucleated cells.  This technique is called BMAC:  Bone Marrow Aspirate Concentration.   The concentrated bone marrow aspirate contains stem cells and has been termed and advertised as ‘stem cell concentrate.”   There are several units commercially-available.

 There are many different types of stem cells in bone marrow. Stem cells that are crticial for regeneration of cartilage, tendon and ligament are very specific and are called mesenchymal stem cells.msc-srtem-cell2

A crtical question which has recently been studied is what is the concentration of  mesenchymal stem cells from commerically available  units.  Equally important, is the question of whether or not the concentration of stem cells from BMAC can made a difference clinically.XXXX demonstrated that bedside bone marrow concentrate machines utilizing a 60cc bone marrow aspirate can produce between 70,000-90,000 mesenchymal stem cells.  What does this mean?  Animal research and data collected at Regenexx suggests that millions of  mesenchyml stem cells are required to repair cartilage, tendon and muscle injuries.  Furthermore unlike the BMAC units, Regenexx expands the number of mesenchymal stems stem to approximately 100-1,000 times the number obtained from BMAC.  So in considering stem cell therapy it is essential to understand both the type and absolute number of stem cells injected since both will play a critical role in the success of a procedure.

bonemarruwaspirate.stemmcell.Harvest BMAC.


  1. Great explanation. And for those wondering how “horrible” the procedure to extract is, speaking from personal experience as someone who has had the Regenexx procedure, I can honestly say it wasn’t bad at all.

    Comment by Mike Nelli — February 12, 2009 @ 6:31 pm

  2. Excellent site and I am really pleased to see you have what I am actually looking for here: this .. as it’s taken me literally 3 hours and 43 minutes of searching the web to find you (just kidding!) so I shall be pleased to become a regular visitor 🙂

    Comment by OrdidoSop — March 4, 2009 @ 1:38 pm

    • thank you.

      Comment by stemcelldoc — March 18, 2009 @ 10:06 am

    • Thank you. I am pleased that my blog has afforded you what you are looking for. Please realize that the future of adult, autologous stem cell therapy is being threatened by the FDA. They contend that minimal expansion constitutes the manufacturing of a DRUG. Accordingly they are of the opinion that your stem cells are under their jurisdiction and therefore subject to regulation. Imagine your own cells being regulated by the Federal government. We have established a national association to establish guidelines:

      We have filed a suit against the FDA in Colorado District Court. The future of stem cell therapy for US Citizens is in jeopardy.

      Comment by stemcelldoc — March 28, 2009 @ 9:25 pm

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