Taurine

   Platelet taurine levels are elevated in autism (Moreno et al,1996; 1992)

Platelet taurine levels are also regulated by thyroid hormones (Baskin et al, 1979), and are higher in hypothyroidism (Sugie et al, 1990).

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Baskin SI, Klekotka SJ, Kendrick ZV, Bartuska DG - "Correlation of platelet taurine levels with thyroid function" J Endocrinol Invest 2(3):245-9 (1979) http://www.ncbi.nlm.nih.gov/htbin-post/Entrez/query?uid=528776&form=6&db=m&Dopt=r

Moreno H, Borjas L, Arrieta A, Saez L, Prassad A, Estevez J, Bonilla E - "Clinical heterogeneity of the autistic syndrome: a study of 60 families" Invest Clin 33(1):13-31 (1992) http://www.ncbi.nlm.nih.gov/htbin-post/Entrez/query?uid=1391074&form=6&db=m&Dopt=r

Moreno-Fuenmayor H, Borjas L, Arrieta A, Valera V, Socorro-Candanoza L - "Plasma excitatory amino acids in autism" Invest Clin 37(2):113-28 (1996) http://www.ncbi.nlm.nih.gov/htbin-post/Entrez/query?uid=8718922&form=6&db=m&Dopt=r

Sugie H, Tsurui S, Ishikawa A, Matsuda F, Sugie Y, Igarashi Y, Fujise Y - "Effects of neonatal hypothyroidism on brain development: analysis of brain metabolites using high resolution phosphorus and proton magnetic resonance (NMR) spectroscopy" No To Hattatsu 22(2):166-72 (1990) http://www.ncbi.nlm.nih.gov/htbin-post/Entrez/query?uid=2331398&form=6&db=m&Dopt=r