The fluid in the lumen of seminiferous tubules is quite different from plasma; it contains very little protein and glucose but is rich in androgens, estrogens, potassium, inositol and Glutamic and Aspartic acid.
42.
This gene is predominantly expressed in the testis and in mouse, tektin 1 mRNA was localized to the spermatocytes and round spermatids in the seminiferous tubules, indicating that it may play a role in spermatogenesis.
43.
In terms of spermatogonia distribution, the structure of teleosts testes has two types : in the most common, spermatogonia occur all along the seminiferous tubules, while in Atherinomorph fish they are confined to the lumen.
44.
During development, primordial germ cells migrate into the seminiferous tubules and downward towards the basement membrane whilst remaining attached to the sertoli cells where they will subsequently differentiate into SSCs, also referred to as Asingle spermatogonia.
45.
Some lines of iPSCs have the potentiality to differentiate into male germ cells and oocyte-like cells in an appropriate niche ( by culturing in retinoic acid and porcine follicular fluid differentiation medium or seminiferous tubule transplantation ).
46.
In males, some of the mesonephric kidney tubules, instead of being used to filter blood like the rest, " grow " over to the developing testes, penetrate them, and become connected to the seminiferous tubules of the testes.
47.
The sperm differentiate inside the seminiferous tubules, then swim down these tubes, then through these special mesonephric tubules, and go down inside Wolffian duct, to the coelom and finally to the organ the animal uses to transport sperm into females.
48.
The blood-testis barrier, maintained by the tight junctions between the Sertoli cells of the seminiferous tubules, prevents communication between the forming spermatozoa in the testis and the blood vessels ( and immune cells circulating within them ) within the interstitial space.
49.
Sustentacular cells are supporting cells of the seminiferous tubules of the testis, responsible for the differentiation of spermatids, the maintenance of the blood-testis barrier, and the secretion of inhibin, androgen-binding protein, and Mullerian-inhibiting factor.
50.
In addition, GJA1 can be found in the Leydig cells and seminiferous tubules between Sertoli cells and spermatogonia or primary spermatocytes, where it plays a key role in spermatogenesis and testis development through controlling the tight junction proteins in the blood-testis barrier.
