Spermatocyte

The spermatogonia continue to reside in the gonocyst and form spermatocyte, which begins to increase in size.

Fragments of laminin chains can act as biologically active peptides to perturb the blood–testis barrier (BTB) permeability function by accelerating protein endocytosis (e.g., occludin) at the site, thereby destabilizing the BTB integrity to facilitate the transit of preleptotene spermatocytes.