Glucosamine

Decreased in autism.

All glucosamine uptake is regulated by thyroid hormones.

T3 controls glucosamine uptake (i.e. Shishiba et al, 1990).

Dexamethasone also inhibits glucosamine uptake (Smith, 1984)

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Shishiba Y, Takeuchi Y, Yokoi N, Ozawa Y, Shimizu T - "Thyroid hormone excess stimulates the synthesis of proteoglycan in human skin fibroblasts in culture" Acta Endocrinol (Copenh) 123(5):541-9  (1990) http://www.ncbi.nlm.nih.gov/htbin-post/Entrez/query?uid=2256434&form=6&db=m&Dopt=r

Smith TJ - "Dexamethasone regulation of glycosaminoglycan synthesis in cultured human skin fibroblasts. Similar effects of glucocorticoid and thyroid hormones" J Clin Invest 74(6):2157-63 (1984) http://www.ncbi.nlm.nih.gov/htbin-post/Entrez/query?uid=6511920&form=6&db=m&Dopt=r