Abstract:
:We previously showed in a primary culture of rat testicular cells that spermatogenic cells specifically bind to somatic Sertoli cells and that this interaction is needed for spermatogenic cells to differentiate in vitro. Adopting an expression cloning procedure, we here isolated a cDNA coding for a spermatogenic cell protein whose expression gave a cultured cell line the ability to bind to Sertoli cells. The protein, 243 amino acids with a putative N-terminal signal peptide and a C-terminal Cys-rich region, turned out to be the rat homologue of a testicular protein called Tpx-1 whose function had yet to be determined. A polyclonal antibody raised against bacterially expressed Tpx-1 significantly inhibited the binding of spermatogenic cells to Sertoli cells. The above results indicated that Tpx-1 is a testicular cell adhesion molecule responsible for the specific interaction between spermatogenic and Sertoli cells.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Maeda T,Sakashita M,Ohba Y,Nakanishi Ydoi
10.1006/bbrc.1998.8918subject
Has Abstractpub_date
1998-07-09 00:00:00pages
140-6issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(98)98918-5journal_volume
248pub_type
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