The Microphthalmia-Associated Transcription Factor (MITF) and Its Role in the Structure and Function of the Eye.

BACKGROUND/OBJECTIVES: The microphthalmia-associated transcription factor () has been found to play an important role in eye development, structure, and function. The gene is responsible for controlling cellular processes in a range of cell types, contributing to multiple eye development processes. In this review, we survey what is now known about the impact of on eye structure and function in retinal disorders. Several mutations in the human and mouse gene are now known, and the effects of these on eye phenotype are addressed. We discuss the importance of in regulating ion transport across the retinal pigment epithelium (RPE) and the vasculature of the eye.

METHODS

The literature was searched using the PubMed, Scopus, and Google Scholar databases. Fundus and Optical Coherence Tomography (OCT) images from mice were obtained with a Micron IV rodent imaging system.

RESULTS

Defects in neural-crest-derived melanocytes resulting from any mutations lead to hypopigmentation in the eye, coat, and inner functioning of the animals. While many mutations target RPE cells in the eye, fewer impact osteoclasts at the same time. Some of the mutations in mice lead to microphthalmia, and ultimately vision loss, while other mice show a normal eye size; however, the latter, in some cases, show hypopigmentation in the fundus and the choroid is depigmented and thickened, and in rare cases mutations lead to progressive retinal degeneration.

CONCLUSIONS

The gene has an impact on the structure and function of the retina and its vasculature, the RPE, and the choroid in the adult eye.