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Cellular creatine homeostasis

Rates of CT synthesis and uptake determine tissue-specific CT content. The rate-limiting step in CT synthesis, arginine:glycine amidinotransferase (AGAT), is controlled by product inhibition (1), and CT negative feedback loop (2). Abbreviations: GAA, guanidinoacetate; GAMT, guanidinoacetate methyltransferase; SAH, S-adenosyl homocysteine; SAM, S-adenosyl methionine; SLC6A8 , CT transporter. (From: Tkachyova I, Tropak MB, Lee A, Datti A, Ito S, Schulze A. Targeting AGAT gene expression - a drug screening approach for the treatment of GAMT deficiency. Expert Opin Drug Discov 2024;19(11):1383-97.)

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