Overexpression of CIRP may reduce testicular damage induced by cryptorchidism

Clin Invest Med. 2009 Apr 1;32(2):E103-11. doi: 10.25011/cim.v32i2.6027.

Abstract

Purpose: To investigate the protective effect of overexpression of cold-inducible RNA-binding protein (CIRP) on testicular damage induced by cryptorchidism.

Methods: Male BALB/c mice were made surgically cryptorchid and CIRP gene was transferred into the cryptorchid testis by in vivo electroporation. Seven or ten days after electroporation, the expression of CIRP, p53 and Fas mRNA and protein were analyzed by reverse-transcription polymerase chain reaction (RT-PCR) and immunoblotting, respectively. Meanwhile, Histopathological changes were observed by light microscope, and flow cytometry was used to detect testicular cell apoptosis.

Results: Testicular weights after transfection with pVAX1-CIRP or pVAX1 were 0.083+/-0.005 g and 0.065+/-0.004 g, respectively, on day 7(P < 0.05) and 0.078+/-0.004 g and 0.052+/-0.007 g, on day 10 (P < 0.05). Testicular cell apoptosis after transfection with pVAX1-CIRP or pVAX1 were 9.8+/-1.1 % and 20.7+/-1.3 %, respectively, on day 7 (P < 0.01) and 10.4+/-0.9 % and 27.5+/-1.2 %, on day 10 (P < 0.01). In addition, the expression of CIRP mRNA and protein in the testes transfected with pVAX1-CIRP were both increased (P < 0.05) at each indicated time point. Meanwhile, the expression of p53 was decreased on day 7 (P < 0.05) and Fas was decreased on day 10(P < 0.05).

Conclusions: Overexpression of CIRP may reduce testicular damage induced by cryptorchidism by down-regulating the levels of p53 and Fas.

MeSH terms

  • Animals
  • Blotting, Western
  • Cryptorchidism / complications*
  • Electroporation
  • Flow Cytometry
  • Male
  • Mice
  • Mice, Inbred BALB C
  • Organ Size
  • RNA, Messenger / genetics
  • RNA-Binding Proteins / genetics
  • RNA-Binding Proteins / metabolism
  • RNA-Binding Proteins / physiology*
  • Reverse Transcriptase Polymerase Chain Reaction
  • Spermatogenesis / physiology
  • Testicular Diseases / etiology*
  • Testicular Diseases / mortality*
  • Testis / metabolism*
  • Testis / pathology*
  • Tumor Suppressor Protein p53 / metabolism
  • fas Receptor / metabolism

Substances

  • Cirbp protein, mouse
  • Fas protein, mouse
  • RNA, Messenger
  • RNA-Binding Proteins
  • Tumor Suppressor Protein p53
  • fas Receptor