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Chai Peptides

Chai Peptides reading list

Original experiments, pooled analyses and clinical reference chapters, with their different purposes left visible.

MOTS-c experiments and observations

The CK2 paper concerns tissue-specific activity and muscle effects in mice and laboratory assays. The exercise paper tests physical performance in mice; the nuclear-translocation paper follows a peptide inside human and mouse cells. The 2023 review brings that biology together.

The hemodialysis cohort asks a different question: whether natural blood levels help predict outcomes. It administered no MOTS-c. My concern with that distinction returns whenever a human association is offered as treatment evidence.

Tesamorelin hormone experiments and fat trials

The healthy-men experiment examines hormone release and insulin sensitivity. The six-month HIV trial measures visceral and liver fat, while the 52-week programme follows the abdominal-fat benefit and its loss after stopping. The 2026 meta-analysis pools five randomized trials in HIV-associated lipodystrophy.

The LiverTox chapter is a drug-safety reference, with the approved indication and an assessment of liver injury. It is not another treatment trial.

Tirzepatide: development, comparisons and harm

The early development report spans laboratory work, mice and early human testing. The receptor-signalling study investigates how the molecule engages its targets.

The direct comparisons are SURPASS-2 in type 2 diabetes and SURMOUNT-5 in obesity. The SURMOUNT-1 obesity trial uses placebo as its comparator. The pancreatitis and biliary-disease review pools safety findings, while StatPearls is a clinical reference chapter whose earlier description of weight use predates the separate weight-management approval.

These reports support the individual findings discussed here. I have no combination-trial result to add to them.

  1. Kumagai H, Kim SJ, Miller B, et al. MOTS-c modulates skeletal muscle function by directly binding and activating CK2. iScience. 2024;27(11):111212. ↗
  2. Bolignano D, Greco M, Presta P, Duni A, et al. The Mitochondrial-Derived Peptide MOTS-c May Refine Mortality and Cardiovascular Risk Prediction in Chronic Hemodialysis Patients: A Multicenter Cohort Study. Blood Purification. 2024;53(10):824-837. ↗
  3. Wan W, Zhang L, Lin Y, Rao X, Wang X, Hua F, Ying J. Mitochondria-derived peptide MOTS-c: effects and mechanisms related to stress, metabolism and aging. Journal of Translational Medicine. 2023;21(1):36. ↗
  4. Reynolds JC, Lai RW, Woodhead JST, Joly JH, Mitchell CJ, Cameron-Smith D, Lu R, Cohen P, Graham NA, Benayoun BA, Merry TL, Lee C. MOTS-c is an exercise-induced mitochondrial-encoded regulator of age-dependent physical decline and muscle homeostasis. Nature Communications. 2021;12(1):470. ↗
  5. Kim KH, Son JM, Benayoun BA, Lee C. The Mitochondrial-Encoded Peptide MOTS-c Translocates to the Nucleus to Regulate Nuclear Gene Expression in Response to Metabolic Stress. Cell Metabolism. 2018;28(3):516-524.e7. ↗
  6. Badran AS, et al. Body composition, hepatic fat, metabolic, and safety outcomes of Tesamorelin, a GHRH analogue, in HIV-associated lipodystrophy: A meta-analysis of randomized controlled trials. Obesity Research & Clinical Practice. 2026;20(1):2-12. ↗
  7. National Institute of Diabetes and Digestive and Kidney Diseases (LiverTox). Tesamorelin - LiverTox: Clinical and Research Information on Drug-Induced Liver Injury. NCBI Bookshelf (NIH). 2018. ↗
  8. Stanley TL, Feldpausch MN, Oh J, Branch KL, Lee H, Torriani M, Grinspoon SK. Effect of tesamorelin on visceral fat and liver fat in HIV-infected patients with abdominal fat accumulation: a randomized clinical trial. JAMA. 2014;312(4):380-389. ↗
  9. Stanley TL, Chen CY, Branch KL, Makimura H, Grinspoon SK. Effects of a growth hormone-releasing hormone analog on endogenous GH pulsatility and insulin sensitivity in healthy men. Journal of Clinical Endocrinology and Metabolism. 2011;96(1):150-158. ↗
  10. Falutz J, Allas S, Mamputu JC, Potvin D, Kotler D, Somero M, Berger D, Brown S, Richmond G, Fessel J, Turner R, Grinspoon S. Long-term safety and effects of tesamorelin, a growth hormone-releasing factor analogue, in HIV patients with abdominal fat accumulation. AIDS. 2008;22(14):1719-1728. ↗
  11. Aronne LJ, et al. Tirzepatide as Compared with Semaglutide for the Treatment of Obesity. N Engl J Med. 2025. ↗
  12. Farzam K, Patel P. Tirzepatide (StatPearls). StatPearls [Internet], NCBI Bookshelf. 2024. ↗
  13. Zeng Q, et al. Safety issues of tirzepatide (pancreatitis and gallbladder or biliary disease) in type 2 diabetes and obesity: a systematic review and meta-analysis. Front Endocrinol (Lausanne). 2023. ↗
  14. Jastreboff AM, et al. Tirzepatide Once Weekly for the Treatment of Obesity. N Engl J Med. 2022. ↗
  15. Frias JP, et al. Tirzepatide versus Semaglutide Once Weekly in Patients with Type 2 Diabetes. N Engl J Med. 2021. ↗
  16. Willard FS, et al. Tirzepatide is an imbalanced and biased dual GIP and GLP-1 receptor agonist. JCI Insight. 2020. ↗
  17. Coskun T, et al. LY3298176, a novel dual GIP and GLP-1 receptor agonist for the treatment of type 2 diabetes mellitus: From discovery to clinical proof of concept. Mol Metab. 2018. ↗