Spermatogenesis in Marsilia

Chromosomal Abnormality in Men with Impaired Spermatogenesis

AN ULTRASTRUCTURAL STUDY OF PLANT SPERMATOGENESIS Spermatogenesis in Nitella

Spermatogenesis in the charophyte Nitella has been followed in antheridia prepared for light and electron microscopy. The antheridial filament cells contain paired centrioles which are similar in structure and behavior to the centrioles of animal cells. In the early spermatid, the centrioles undergo an initial elongation at their distal ends and become joined by a spindle-shaped fibrous connect...

Drug transporters in spermatogenesis

Drug transporters are integral membrane proteins expressed by a variety of organs, including the liver, kidney, small intestine and testis, and they are generally known to mediate drug or xenobiotic transport into and out of cells. Previous studies have also reported the presence of several drug transporters at blood-tissue barriers where they are thought to protect organs from harmful agents. ...

In vitro spermatogenesis

The generation of functional sperm in vitro has been a goal for almost a century. Until recently, researchers have only succeeded in reproducing the early steps of spermatogenesis. This is not surprising given that spermatogenesis is a complicated process that requires the coordinated efforts of germ cells and several somatic cells within the tubular structure of the testis. Finally-last year-S...

Estrogens Receptors-New Players in Spermatogenesis

The mammalian testis is a complex organ that serves two important functions, synthesis of steroids, with significant amount of estrogenic hormones produced and production of spermatozoa. Estrogen receptors (ERs) are expressed in cells of the testis as well as the epididymal epithelium. We have demonstrated that estrogen receptor expression is higher in reproductive tissues as compared to non-re...