• PMID: 21852425
• Gene Name: PHF13
• Condition: Important for sustained spermatogenesis
• Association: Associated
• Sex: Male
• Infertility type: Male infertility
• Other associated phenotypes: Important for sustained spermatogenesis

SPOC1 (PHF13) is required for spermatogonial stem cell differentiation and sustained spermatogenesis

Bördlein A, Scherthan H, Nelkenbrecher C, Molter T, Bösl MR, Dippold C, Birke K, Kinkley S, Staege H, Will H, Winterpacht A.

SPOC1 (PHF13) is a recently identified protein that has been shown to dynamically associate with somatic chromatin, to modulate chromatin compaction and to be important for proper cell division. Here, we report on the expression of SPOC1 in promyelocytic leukaemia zinc finger (PLZF)-positive undifferentiated spermatogonial stem cells (SSCs) of the mouse testis. To investigate further the biological function of SPOC1 in germ cells we generated Spoc1 mutant mice from a gene-trap embryonic stem cell clone. Postpubertal homozygous Spoc1(-/-) animals displayed a pronounced progressive loss of germ cells from an initially normal germ epithelium of the testis tubules leading to testis hypoplasia. This loss first affected non-SSC stages of germ cells and then, at a later time point, the undifferentiated spermatogonia. Remarkably, successive loss of all germ cells (at >20 weeks of age) was preceded by a transient increase in the number of undifferentiated A(aligned) (A(al)) spermatogonia in younger mice (at >10 weeks of age). The number of primary Spoc1(-/-) gonocytes, the proliferation of germ cells, and the initiation and progression of meiosis was normal, but we noted a significantly elevated level of apoptosis in the Spoc1(-/-) testis. Taken together, the data argue that SPOC1 is indispensable for stem cell differentiation in the testis and for sustained spermatogenesis. FAU - Bördlein, Annegret AU - Bördlein A AD - University Hospital Erlangen, University of Erlangen-Nürnberg, 91054 Erlangen, Germany. FAU - Scherthan, Harry AU - Scherthan H FAU - Nelkenbrecher, Claudia AU - Nelkenbrecher C FAU - Molter, Tina AU - Molter T FAU - Bösl, Michael R AU - Bösl MR FAU - Dippold, Christine AU - Dippold C FAU - Birke, Kerstin AU - Birke K FAU - Kinkley, Sarah AU - Kinkley S FAU - Staege, Hannah AU - Staege H FAU - Will, Hans AU - Will H