Are your naïve T-cells more like Martin Riggs or Roger Murtaugh?

Ed Park, MD dr ed park, immune senescence, stem cells, Telomerase activation, Telomere erosion 0 Comments

I was pleased to get my results from my Telomere testing this week showing I have the immune system of a teenager.

It is known that as we age, our ability to respond to cancer and immune challenges decreases as a function of our decreasing reserve of Naive T-Cells (CD45+ CD28+ CD20-) 

The biggest declines occur in the first year of life and are also rapid until puberty.

The average telomere length of my Naive T Cells is 9.2, which is quite high

Screen Shot 2015-08-04 at 12.28.31 AM

Here is a nomogram of average telomere lengths by age for these Naive T-CellsScreen Shot 2015-08-04 at 12.26.39 AM

–from  Aubert et al, “Collapse of Telomere Homeostasis in Hematopoietic Cells Caused by Heterozygous Mutations in Telomerase Genes”. PLOS Genetics, May 17, 2012

 

This chart and my own results are both from REPEAT Diagnostics, based out the University of British Columbia.

Interestingly, Naive T-Cells can be further subdivided into “good cops” and “bad cops” as in Lethal Weapon.  The good ones, present in younger, healthier individuals, are naive and ready to go, like bat guano crazy Mel Gibson’s Martin Riggs character.  The bad ones are like Danny Glover’s character, Roger Murtaugh, hiking up their pants and counting the days to retirement while muttering “I’m too old for this $h!t”.  The difference is in how many TRECs they possess and whether the CD31 receptor is retained:

The aging process also changes the quality of naïve T cells. There are two subsets of naïve (CD62L+CD45RA+) CD4+ T cells in the peripheral blood of humans, defined by the presence or absence of CD31 (PECAM-1) (Kimmig et al., 2002). CD31+ naïve CD4+ T cells may resemble recent thymic emigrants, with a high content of T cell receptor excision circles (TRECs), while CD31− naïve CD4+ T cells have a lower TREC content and a restricted T cell repertoire (TCR).

— from http://journal.frontiersin.org/article/10.3389/fimmu.2013.00136/full


 

Interestingly, another study looked at these PECAM-1 or CD31 subclasses of naive T-cells and found that even children had lost most of their best cops as defined by this marker.  And within two adult individuals, the good cop naive t-cells had higher telomerase activity than the bad cop naive t-cells:

telomerase-PECAM

from – http://www.ncbi.nlm.nih.gov/pubmed/17935071


 

For a nice review article of immune senescence as a marker of aging (although I think it is also the cause) read this reference: http://journal.frontiersin.org/article/10.3389/fimmu.2013.00136/full

For an interesting blog about immune aging and a link to the the video I did on “AIDS and Aging”, check out this blog.

 

Ed Park, MD
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Ed Park, MD

I graduated from Harvard with honors in Biological Anthropology prior to earning my Medical Degree and Masters in Public Health from Columbia University.

In 2007, I became the nineteenth patient to sign up for the use of a herbally-extracted telomerase activator.

The results were so positive that I founded Recharge Biomedical Clinic in 2008 and have since become the leading medical expert in this exciting new field of regenerative medicine treating over 1,300 patients with this exciting new telomerase activation medicine.

I won two Houston Film Festival Awards for my screenplays about Hypatia of Alexandria and Ed Brown of Kentucky.

In 2010 I wrote and self-published a Sci-Fi Graphic Novel called MAXIMUM LIFESPAN

In 2013, I wrote and published "Telomere Timebombs; Defusing the Terror of Aging"

My websites are:
http://www.lokahi.guru (where you can learn about my RECHARGE adaptogenic supplement)
http://www.rechargebiomedical.com and
http://www.telomeretimebombs.com

You can sign up for my weekly blogs on this page and subscribe to my YouTube videos at https://www.youtube.com/drpark65
Ed Park, MD
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