C57BL/6-Esr1^{tm2.1(cre)And}/J

Common Name: Esr1-Cre

The Esr1cre knock-in allele has Cre recombinase expression directed to estrogen receptor 1 alpha (Esr1 or ERα)-expressing cells by the endogenous Esr1 promoter/enhancer elements; specifically in the ventrolateral subdivision of the ventromedial hypothalamus that, like wildtype mice, is greater in females than males. Expression is also observed in arcuate nucleus (ARH). These Esr1-Cre knock-in mice may be useful for studying the function of this ligand-inducible transcription factor in social interactions, neuronal differentiation, sympathetic nervous system development, hypothalamus, female reproductive organs (endometrium and ovarian stroma cells), and male efferent duct epithelial cells. They may also be useful for studying ERα-positive breast cancer and steroid hormone-induced malignancies. Esr1-Cre knock-in mice are available on a C57BL/6N background and a C57BL/6J background.