Fig. 7. Bioenergetics-independent role of lactate during eye morphogenesis.
Glycolysis-derived lactate possesses non-metabolic functions that contribute to transcriptional regulation through epigenetic pathways involving histone H3 acetylation writer and eraser. Higher glucose uptake begins in the anterior neural plate (ANP) prior to optic vesicle (OV) morphogenesis. While the activity of Glut1 and Ldha is required for canonical glycolysis, the final product of glycolysis, lactate, acts as a signaling molecule being likely an endogenous HDAC inhibitor during eye morphogenesis. This non-canonical regulation is ATP-production independent and pivotal for specific eye developmental programs. cyto cytoplasm, nuc nucleus, enh enhancers, prom promoters.