Thiamine activity pathway

The thiamine activity pathway encompasses the intestinal absorption, intracellular activation, transport, and diverse roles of thiamine (vitamin B1) in human physiology. Thiamine, a water-soluble vitamin, is converted in the body to its active forms—mainly thiamine pyrophosphate (TPP)—by enzymes such as thiamine diphosphokinase. TPP is an essential coenzyme for several key enzymes involved in energy and carbohydrate metabolism (notably, transketolase, pyruvate dehydrogenase, and α-ketoglutarate dehydrogenase). Thiamine and its derivatives also have non-coenzymatic regulatory roles affecting cellular signaling and nerve function. Deficiencies in this pathway lead to major disorders primarily in the nervous and cardiovascular systems; replenishment or support of thiamine activity is therefore essential in clinical care, but the pathway itself is not a single drug target[1][2][4][6].

Other names

Thiamine metabolic pathwayVitamin B1 activity pathwayThiamine utilization pathway

Provision of essential coenzyme (cofactor) activity for enzymes such as transketolase, pyruvate dehydrogenase, α-ketoglutarate dehydrogenase, and branched-chain α-ketoacid dehydrogenase Correction of thiamine deficiency, restoring metabolic and neurological function