PATZI gene has a critical role in the spermatogenesis and testicular tumours

M. Fedele, R. Franco, G. Salvatore, M. P. Paronetto, F. Barbagallo, R. Pero, L. Chiariotti, C. Sette, D. Tramontano, G. Chieffi, A. Fusco, P. Chieffi

Research output: Contribution to journalArticlepeer-review

Abstract

PATZ1 is a recently discovered zinc finger protein that, due to the presence of the POZ domain, acts as a transcriptional repressor affecting the basal activity of different promoters. To gain insights into its biological role, we generated mice lacking the PATZ1 gene. Male PATZ1-/- mice were unfertile, suggesting a crucial role of this gene in spermatogenesis. Consistently, most of adult testes from these mice showed only few spermatocytes, associated with increased apoptosis, and complete absence of spermatids and spermatozoa, with the subsequent loss of tubular structure. The analysis of PATZ1 expression, by northern blot, western blot and immunohistochemistry, revealed its presence in Sertoli cells and, among the germ cells, exclusively in the spermatogonia. Since PATZ1 has been indicated as a potential tumour suppressor gene, we also looked at its expression in tumours deriving from testicular germ cells (TGCTs). Although expression of PATZl protein was increased in these tumours, it was delocalized in the cytoplasm, suggesting an impaired function. These results indicate that PATZ1 plays a crucial role in normal male gametogenesis and that its up-regulation and mis-localization could be associated to the development of TGCTs.

Original languageEnglish
Pages (from-to)39-47
Number of pages9
JournalJournal of Pathology
Volume215
Issue number1
DOIs
Publication statusPublished - May 2008

Keywords

  • MAZR
  • Spermatogenesis
  • Testicular cancer
  • Tumour suppressor
  • ZSG

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

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