Mythbusters: Injecting Stem Cells IV Means Only 0.0005% Reach their Target in the Brain…

By /

As I have blogged before, many stem cell treatment centers around the world inject stem cells IV.  This makes sense, as it’s a very simple procedure with very few complications.  However, a bevy of recent studies have questioned the efficacy of this approach.  The problem is the “pulmonary first pass effect” which means that when adult stem cells are injected IV, about 95% get trapped in the lungs.  A recent study looked at how many actually ended up in the brain when injected IV.  Turns out a paltry 0.0005% or about 5 cells out of 1,000,000 injected ended up in the brain.  Here’s how it broke down.  48 hours after the IV injection of mesenchymal stem cells:

-Between 1.5 and 3.7% of the infused cells made it past the lungs

-0.295% of the cells made it to the carotid artery

– 0.0005% made it past the blood brain barrier and ended up in brain tissue

What does this mean?  It means that if you injected 100 million mesenchymal stem cells IV (a higher end dose), only 500 would end up in the brain.  Is this a lot of cells in the brain?  No, it’s so far below what the experimental models show would likely cause brain repair as to be insignificant.  As an example, 100 million MSC’s if stored in a semisolid state would be about the size of a pea.  500 MSC’s would be much much smaller than the head of the sharpest pin imaginable.

The upshot?  Real adult stem cell treatments aimed at treating a target tissue (like the brain) involve local delivery to the area.  While IV treatments may work for things like lung disease or general anti-aging, for fixing a specific damaged tissue this is not a viable treatment method.  It’s also important to note that other types of stem cells (outside of adult mesenchymal or heamtopoetic stem cells) may or may not suffer from this problem.  For examples, VSEL’s are known to be very small and they may escape this first pass effect in the lungs.

Join us for a free Regenexx webinar.
Chris Centeno, MD is a specialist in regenerative medicine and the new field of Interventional Orthopedics. Centeno pioneered orthopedic stem cell procedures in 2005 and is responsible for a large amount of the published research on stem cell use for orthopedic applications. View Profile

If you have questions or comments about this blog post, please email us at [email protected]

NOTE: This blog post provides general information to help the reader better understand regenerative medicine, musculoskeletal health, and related subjects. All content provided in this blog, website, or any linked materials, including text, graphics, images, patient profiles, outcomes, and information, are not intended and should not be considered or used as a substitute for medical advice, diagnosis, or treatment. Please always consult with a professional and certified healthcare provider to discuss if a treatment is right for you.

Get Blog Updates by Email

We do not sell, or share your information to third party vendors.

By submitting the form you agree that you’ve read and consent to our Privacy Policy. We may use email, phone, or other electronic means to communicate information about Regenexx.

We will provide information to help you decide whether you want to schedule an evaluation with a Regenexx Physician.

Insurance typically covers evaluations and diagnostic testing (if recommended). Most insurance plans currently do not cover Regenexx Procedures.

Copyright © Regenexx 2021. All rights reserved.

CONTACT INFORMATION

Address

9035 Wadsworth Pkwy #1000
Westminster, CO 80021

Phone

*DISCLAIMER: Like all medical procedures, Regenexx® Procedures have a success and failure rate. Patient reviews and testimonials on this site should not be interpreted as a statement on the effectiveness of our treatments for anyone else.

Providers listed on the Regenexx website are for informational purposes only and are not a recommendation from Regenexx for a specific provider or a guarantee of the outcome of any treatment you receive.

LinkedIn
Email
TO TOP