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Activation of telomerase by TA-65 enhances immunity and reduces inflammation post myocardial infarction

Bawamia, Bilal; Spray, Luke; Wangsaputra, Vincent K.; Bennaceur, Karim; Vahabi, Sharareh; Stellos, Konstantinos; Kharatikoopaei, Ehsan; Ogundimu, Emmanuel; Gale, Chris P.; Keavney, Bernard; Maier, Rebecca; Hancock, Helen; Richardson, Gavin; Austin, David; Spyridopoulos, Ioakim

Activation of telomerase by TA-65 enhances immunity and reduces inflammation post myocardial infarction Thumbnail


Authors

Bilal Bawamia

Luke Spray

Vincent K. Wangsaputra

Karim Bennaceur

Sharareh Vahabi

Konstantinos Stellos

Ehsan Kharatikoopaei

Chris P. Gale

Bernard Keavney

Rebecca Maier

Helen Hancock

Gavin Richardson

David Austin

Ioakim Spyridopoulos



Abstract

Myocardial infarction (MI) accelerates immune ageing characterised by lymphopenia, expansion of terminally differentiated CD8+ T-lymphocytes (CD8+ TEMRA) and inflammation. Pre-clinical data showed that TA-65, an oral telomerase activator, reduced immune ageing and inflammation after MI. We conducted a double blinded randomised controlled pilot trial evaluating the use of TA-65 to reduce immune cell ageing in patients following MI. Ninety MI patients aged over 65 years were randomised to either TA-65 (16 mg daily) or placebo for 12 months. Peripheral blood leucocytes were analysed by flow cytometry. The pre-defined primary endpoint was the proportion of CD8+ T-lymphocytes which were CD8+ TEMRA after 12 months. Secondary outcomes included high-sensitivity C-reactive protein (hsCRP) levels. Median age of participants was 71 years. Proportions of CD8+ TEMRA did not differ after 12 months between treatment groups. There was a significant increase in mean total lymphocyte count in the TA-65 group after 12 months (estimated treatment effect: + 285 cells/μl (95% CI: 117–452 cells/ μ l, p < 0.004), driven by significant increases from baseline in CD3+, CD4+, and CD8+ T-lymphocytes, B-lymphocytes and natural killer cells. No increase in lymphocyte populations was seen in the placebo group. At 12 months, hsCRP was 62% lower in the TA-65 group compared to placebo (1.1 vs. 2.9 mg/L). Patients in the TA-65 arm experienced significantly fewer adverse events (130 vs. 185, p = 0.002). TA-65 did not alter CD8+ TEMRA but increased all major lymphocyte subsets and reduced hsCRP in elderly patients with MI after 12 months.

Journal Article Type Article
Acceptance Date Apr 6, 2023
Online Publication Date Apr 22, 2023
Publication Date Aug 1, 2023
Deposit Date May 5, 2023
Publicly Available Date Dec 15, 2023
Journal GeroScience
Print ISSN 2509-2715
Electronic ISSN 2509-2723
Publisher Springer
Peer Reviewed Peer Reviewed
Volume 45
Issue 4
Pages 2689-2705
DOI https://doi.org/10.1007/s11357-023-00794-6
Keywords T-lymphocytes, Ageing, Telomerase, Immunosenescence, Acute myocardial infarction
Public URL https://durham-repository.worktribe.com/output/1174592

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