The Road to Longevity
Donald McLeod M.D., Philip White M.D., and W.M. Heatherington
The Truth About Hormone Replacement, Antioxidants, Exercise, Stress, and Diet.

Section III
The Thymus (cont'd)

Prior to this experiment it had been almost universally held that the involution of the thymus was irreversible, that organisms were genetically programmed to lose the thymus, that it was inevitable. In Dr. Kelley's words:

"Everyone considered that the thymus went away and you couldn't get it back. But clearly that was incorrect. It was not due to a genetic defect. It was not programmed to go away in the sense that you could not get it back. You could get it back by using a treatment. And that treatment is growth hormone."

As a corollary to this finding, Dr. Kelley also discovered that the T-cells in the treated rats were restored to where they were able to make more interleukin 2.
"The synthesis of interleukin 2 by T-cells in old rats goes down. If you give them growth hormone, it comes back up."

You can almost hear a "Eureka!" in his words.

Figure in Printed Version: Lymph Nodes (LN) as part of the body's lymphatic system of drainage for immune function against cancer toxins and infection showing relationship to Thymus.
Figure in Printed Version: Defects preventing proper immune response to tumour showing different T-Cells, some programmed from the Thymus.
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