Influence of CAG Repeat Polymorphism on the Targets of Testosterone Action

madman

Super Moderator
It should be finally acknowledged that the AR CAG repeat polymorphism plays a role in testosterone replacement therapy of males with hypogonadotropic gonadism since shorter AR gene CAG tract lengths was found to yield greater metabolic improvement in response to testosterone administration.




Conclusion

*in 2015 a large body of evidence indicated an important role for AR CAG polymorphism in conditioning the peripheral effect of testosterone even if its contribution warrants further assessment because of the many controversial findings in each androgen-related action

*at present AR CAG polymorphism is not recommended in the routine setting however in the near future it could become of clinical relevance because of the theoretical possibility of identifying subjects more or less at risk for various disorders more or less responsive to testosterone treatment

*study of CAG repeat length could allow us to individually tailor testosterone replacement therapy as subjects with shorter CAG repeat could need lower doses of testosterone while men with longer repeats could require higher ones
 

Attachments

Fascinating thread and explains why I need so little testosterone.

Indeed there is so much more research needed to be done in this area of polymorphism of the AR, AR DDS (density, distribution, sensitivity), and soon enough, it could very well have a significant impact on how men are treated regarding low testosterone and trt.

Much still to be learned!
 

hCG Mixing Calculator

HCG Mixing Protocol Calculator

TRT Hormone Predictor Widget

TRT Hormone Predictor

Predict estradiol, DHT, and free testosterone levels based on total testosterone

⚠️ Medical Disclaimer

This tool provides predictions based on statistical models and should NOT replace professional medical advice. Always consult with your healthcare provider before making any changes to your TRT protocol.

ℹ️ Input Parameters

Normal range: 300-1000 ng/dL

Predicted Hormone Levels

Enter your total testosterone value to see predictions

Results will appear here after calculation

Understanding Your Hormones

Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

DHT

Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

Free Testosterone

The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

Beyond Testosterone Podcast

Online statistics

Members online
4
Guests online
185
Total visitors
189

Latest posts

Back
Top