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Article

Decreased levels of Ca2+-calmodulin-dependent protein kinase IV in the testis as a contributing factor to reduced fertility in male Crybb2-/- mice

  • Authors:
    • Fenfen Xiang
    • Bei Cui
    • Qian Gao
    • Jianrong Zhang
    • Junjie Zhang
    • Wenjie Li
  • View Affiliations / Copyright

    Affiliations: Department of Laboratory Diagnosis, Changhai Hospital, Second Military Medical University, Shanghai 200433, P.R. China, Department of Ophthalmology, Changhai Hospital, Second Military Medical University, Shanghai 200433, P.R. China, Department of Obstetrics and Gynecology, Changhai Hospital, Second Military Medical University, Shanghai 200433, P.R. China
  • Pages: 1145-1151
    |
    Published online on: September 3, 2012
       https://doi.org/10.3892/ijmm.2012.1116
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Abstract

βB2-crystallin (Crybb2), a member of the βγ-crystallin superfamily, in conjunction with α-crystallin, constitute the major proteins of the mammalian eye lens. Crybb2 is also expressed outside the lens, and certain related functions in these tissues have been reported. In the present study, in order to define the physiological role of Crybb2, we generated mice with a targeted deletion of the Crybb2 gene. Surprisingly, fertility was markedly reduced in male homozygous knockout mice compared to wild-type (WT) mice. Further experiments were performed to explore the underlying mechanism of subfertility in male Crybb2-/- mice. Our results showed that Crybb2 was mainly expressed in the spermatogonia from the testes of mice with the WT C57BL/C genetic background. The testes of 4-week-old Crybb2-/- mice were significantly hyperplastic, and no significant difference was found within 3 weeks postpartum. Additionally, there was a marked increase in the proliferation and apoptosis of germ cells, and the biological defects of these cells correlated with the decreased Bcl-2 levels, which correlated with the reduction of Ca2+-calmodulin-dependent protein kinase IV (CaMKIV) in the testis. These results suggest that the reduced fertility of Crybb2-/- male mice may result from the disordered proliferation and apoptosis of germ cells in the testis, possibly due to reduced CaMKIV from the loss of Crybb2.
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Copy and paste a formatted citation
Spandidos Publications style
Xiang F, Cui B, Gao Q, Zhang J, Zhang J and Li W: Decreased levels of Ca2+-calmodulin-dependent protein kinase IV in the testis as a contributing factor to reduced fertility in male Crybb2-/- mice. Int J Mol Med 30: 1145-1151, 2012.
APA
Xiang, F., Cui, B., Gao, Q., Zhang, J., Zhang, J., & Li, W. (2012). Decreased levels of Ca2+-calmodulin-dependent protein kinase IV in the testis as a contributing factor to reduced fertility in male Crybb2-/- mice. International Journal of Molecular Medicine, 30, 1145-1151. https://doi.org/10.3892/ijmm.2012.1116
MLA
Xiang, F., Cui, B., Gao, Q., Zhang, J., Zhang, J., Li, W."Decreased levels of Ca2+-calmodulin-dependent protein kinase IV in the testis as a contributing factor to reduced fertility in male Crybb2-/- mice". International Journal of Molecular Medicine 30.5 (2012): 1145-1151.
Chicago
Xiang, F., Cui, B., Gao, Q., Zhang, J., Zhang, J., Li, W."Decreased levels of Ca2+-calmodulin-dependent protein kinase IV in the testis as a contributing factor to reduced fertility in male Crybb2-/- mice". International Journal of Molecular Medicine 30, no. 5 (2012): 1145-1151. https://doi.org/10.3892/ijmm.2012.1116
Copy and paste a formatted citation
x
Spandidos Publications style
Xiang F, Cui B, Gao Q, Zhang J, Zhang J and Li W: Decreased levels of Ca2+-calmodulin-dependent protein kinase IV in the testis as a contributing factor to reduced fertility in male Crybb2-/- mice. Int J Mol Med 30: 1145-1151, 2012.
APA
Xiang, F., Cui, B., Gao, Q., Zhang, J., Zhang, J., & Li, W. (2012). Decreased levels of Ca2+-calmodulin-dependent protein kinase IV in the testis as a contributing factor to reduced fertility in male Crybb2-/- mice. International Journal of Molecular Medicine, 30, 1145-1151. https://doi.org/10.3892/ijmm.2012.1116
MLA
Xiang, F., Cui, B., Gao, Q., Zhang, J., Zhang, J., Li, W."Decreased levels of Ca2+-calmodulin-dependent protein kinase IV in the testis as a contributing factor to reduced fertility in male Crybb2-/- mice". International Journal of Molecular Medicine 30.5 (2012): 1145-1151.
Chicago
Xiang, F., Cui, B., Gao, Q., Zhang, J., Zhang, J., Li, W."Decreased levels of Ca2+-calmodulin-dependent protein kinase IV in the testis as a contributing factor to reduced fertility in male Crybb2-/- mice". International Journal of Molecular Medicine 30, no. 5 (2012): 1145-1151. https://doi.org/10.3892/ijmm.2012.1116
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