A 22-amino-acid peptide regulates tight junctions through occludin and cell apoptosis.

ABSTRACT: Occludin is a structural protein of tight junctions (TJ) in the blood-testis barrier (BTB). A 22-amino-acid peptide (22AA) in the second extracellular loop can reversibly regulate TJ, but its regulatory mechanism is unknown. In this study, a 22AA-induced TJ destruction animal model was constructed to investigate the effect of 22AA on Sertoli cells (SCs) and spermatid counts and cell apoptosis at different time points using a multiplex immunofluorescence technique. The effect of 22AA on the location and distribution of occludin was analyzed via dual confocal fluorescence microscope. Western blotting was used to analyze dynamic changes in occludin expression. Real-time RT-PCR was used to analyze miR-122-5p expression changes. Sperm density counts and mating methods were used to analyze the e

SUBMITTER: Zhu M 

PROVIDER: S-EPMC7646304 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature