Taurine: new implications for an old amino acid.
Level 5 - mechanism / opinion, no new human data
Narrative review summarizing in vitro, biochemical, and animal knockout studies without original human data.
PubMed 14553911 · doi:10.1016/S0378-1097(03)00611-6
What was done
The authors reviewed molecular, biochemical, and animal model literature regarding the physiological functions of taurine. The review focuses on taurine distribution, biosynthesis enzymes (cysteine sulfinic acid decarboxylase and cysteine dioxygenase), mitochondrial uridine modification, taurine transporter knockout mouse phenotypes, and anti-inflammatory signaling mechanisms mediated by taurine chloramine (Tau-Cl).
What was found
The abstract reports that taurine reaches up to 50 mM in leukocytes and reacts with hypochlorous acid to generate Tau-Cl. Tau-Cl down-regulates pro-inflammatory mediator production in rodent and human leukocytes and inhibits NF-kappaB activation by oxidizing IkappaB-alpha at Met45. Novel taurine-containing modified uridines were identified in human and bovine mitochondria. Taurine transporter knockout mice show reduced taurine levels, reduced fertility, and loss of vision caused by severe apoptotic retinal degeneration. No clinical trial outcome statistics are reported.
Why it matters
The review outlines how taurine functions beyond an osmotic regulator, acting as an anti-inflammatory modulator through Tau-Cl and a constituent of mitochondrial macromolecules.
Limits
The paper is a narrative review with no systematic search methodology. Reported findings derive primarily from cellular and animal knockout models, with no clinical trial data or quantitative effect sizes in humans.
Cited by
- supports Taurine is concentrated in the brain, retina, kidneys, and immune cells.