The<unk>  of the<unk>  has been studied in several vertebrate species, especially the newt, which is able to repeatedly regenerate a perfect<unk> . One study found that the<unk>  of a newt that had been extracted and regenerated 18 times was indistinguishable from the<unk>  of a control newt in terms of appearance and gene expression. In such cases, the<unk>  has been found to regenerate completely from epithelial cells in the cornea or iris. The signalling mechanisms which control this process include fibroblast growth factor, hedgehog, retinoic acid, transforming growth factor beta and wnt. The Haotian, Hong, Jie, Shan trial conducted experiments on mice, rabbits and cultured human cells and reported that the proteins produced by the PAX6 and BMI1 genes were essential for<unk>  of existing<unk>  epithelial cells (LECs) lining the<unk>  capsule.
Lens regeneration
Inner ear regeneration
Tooth regeneration
Salutogenesis
Arteriogenesis
Lymphangiogenesis
Neurosecretion
Vasculogenesis