Metallothionein is upregulated by hypoxia and stabilizes hypoxia-inducible factor in the kidney.

Kojima I, Tanaka T, Inagi R, Nishi H, Aburatani H, Kato H, Miyata T, Fujita T, Nangaku M.Kidney Int. 2009 Feb;75(3):268-77. doi: 10.1038/ki.2008.488