Variant hepatocyte nuclear factor 1 expression in the mouse genital tract

Area of Science:

• Developmental biology
• Molecular genetics
• Reproductive biology

Background:

• Variant Hepatocyte Nuclear Factor 1 (vHNF1/HNF1beta) is a transcription factor crucial for embryonic development.
• vHNF1 is expressed in various epithelial tissues, including the gut, liver, pancreas, lung, and kidney.

Purpose of the Study:

• To investigate the expression pattern of vHNF1 in the mouse reproductive system.
• To characterize vHNF1 expression in the context of a heterozygous mutant mouse model.

Main Methods:

• RNA analysis and in situ hybridization.
• Utilizing a vHNF1 heterozygous mutant mouse line with an NLSLacZ reporter gene.
• Detection of beta-galactosidase activity and vHNF1 transcripts.

Main Results:

• vHNF1 expression and reporter gene activity were observed in the epididymis, vas deferens, seminal vesicle, prostate, uterus, and oviduct.
• vHNF1 transcripts were detected in testicular germinal cells, but unexpectedly, no reporter gene activity was found in the testis.
• Two novel vHNF1 transcript variants, lacking exons 1-4, were identified in the testis after meiosis.

Conclusions:

• vHNF1 plays a role in the development and function of the mouse genital tract.
• The absence of reporter gene activity in the testis suggests tissue-specific regulation of vHNF1.
• Novel vHNF1 transcript variants in the testis indicate complex post-meiotic gene expression regulation.