Overexpression of YAP1 induces immortalization of normal human keratinocytes by blocking clonal evolution.

YAP1 is a transcriptional co-activator able to bind several transcription factors. YAP1 was termed a candidate oncogene after it was shown to be in human chromosome 11q22 amplicon; besides the genomic amplification, several experiments indicated that it has oncogenic function. However, YAP1 was also reported to be a tumor suppressor as its gene locus is deleted in some breast cancers.

Telomerase activity is sufficient to bypass replicative senescence in human limbal and conjunctival but not corneal keratinocytes.

The human ocular surface is covered by the conjunctival, corneal and limbal stratified epithelia. While conjunctival stem cells are distributed in bulbar and forniceal conjunctiva, corneal stem cells are segregated in the basal layer of the limbus, which is the transitional zone between the cornea and the bulbar conjunctiva. Keratinocyte stem and transient amplifying (TA) cells when isolated in culture give rise to holoclones and paraclones, respectively.

Erbium:YAG laser and cultured epidermis in the surgical therapy of stable vitiligo.

Objective: To induce complete and reproducible repigmentation of large "stable" vitiligo lesions by means of autologous cultured epidermal grafts using a rapid, simple, and minimally invasive surgical procedure.

Design: Achromic epidermis was removed by means of appropriately settled erbium:YAG laser, and autologous epidermal grafts were applied onto the recipient bed. Melanocyte content was evaluated by dopa reaction.