GREB1L as a candidate gene of Mayer-Rokitansky-Küster-Hauser Syndrome.

Mayer-Rokitansky-Küster-Hauser (MRKH) Syndrome is a sex development disorder that affects 1 in every 4500 46, XX live births. At least a subset of MRKH syndrome is genetically related to which various candidate genes have been identified. The growth regulation by estrogen in breast cancer 1-like gene (GREB1L) is an androgen-regulated gene reported to be a co-activator of the retinoic acid receptor gene (RAR). Thus expression levels of GREB1L have implications on renal system cellular differentiation, morphogenesis, and homeostasis in vertebrates. Variants of GREB1L have been reported in familial and sporadic MRKH Syndrome and more importantly, in a three-generation family ofMRKH syndrome propositae. Much the same way, Mutants of GREB1L have also been identified in isolated bilateral renal agenesis and deafness both of which are extra-genital tract anomalies in MRKH type 2. Again, renal agenesis transgenic mice have been produced from an E13.5 CRISPR/cas9 GREB1L mutagenesis. Though no GREB1L mutation has been reported in cardiac malformation, there is evidence that GREB1L is involved in ventricular development. Here, we intorigate evidence that projects GREB1L as a candidate gene of Mayer-Rokitansky-Küster-Hauser Syndrome and propose that functional validation analysis to that effect is imparative.