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  • Alexander Kolliari-Turner

Alexander Kolliari-Turner

Alex graduated from the University of Oxford with a BA in Biological Sciences in 2015. He achieved the highest 2:1 in his year group and was awarded the Heron-Allen Academic Scholarship from Lady Margaret Hall.

Email address: A.Kolliari-Turner@brighton.ac.uk

Qualification: PhD

Timeframe: November 2017- November 2024

Alex-Kolliari-Turner

Thesis title

Implications of RNA-seq in the detection of anabolic steroid use and the harnessing of the molecular mechanism(s) of muscle memory

My research

Studies in both humans and mice have demonstrated that anabolic-androgenic steroids (AAS) can increase the number of nuclei within muscle fibres. This accretion of “myonuclei” is how AAS increase hypertrophy via enhanced rates of protein synthesis. In a mouse model these myonuclei have been demonstrated to be retained after AAS usage has ceased and these subsequently elevated levels facilitate muscle re-growth and thus enhance "muscle memory". These findings indicate that the benefits of AAS usage are long lasting and suggest that if an athlete serves a ban and returns to sport they may have a permanent advantage in their ability to build muscle - even when they are no longer taking AAS. Previous studies on powerlifters who took AAS in the past (PREV group), but are currently drug free, have demonstrated that these individuals have more myonuclei in their trapezius muscle than powerlifters who are currently using AAS (PAS group), clean powerlifters (P group) and controls (C group). Additionally, the number of myonuclei within the vastus lateralis was comparable between the PREV and P groups. This data suggests that the myonuclei obtained via strength training and AAS usage are retained in humans and therefore could provide long term advantages to AAS users, but more data is needed to confirm this hypothesis. This thesis aims to recruit similar groups to further investigate muscle memory. Additionally, RNA-Sequencing will be conducted on blood samples to explore the possibility of a transcriptomic signature of doping that could enhance AAS detection strategies.       

Funder: World Anti-Doping Agency

Supervisors

Professor Yannis Pitsiladis

Dr Guan Wang

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