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Article

Decreased SUMOylation of the retinoblastoma protein in keratinocytes during the pathogenesis of vitiligo

  • Authors:
    • Miaoni Zhou
    • Fuquan Lin
    • Wen Xu
    • Rong Jin
    • Aie Xu
  • View Affiliations / Copyright

    Affiliations: Department of Dermatology, Hangzhou Institute of Dermatology and Venereology, Third People's Hospital of Hangzhou, Hangzhou, Zhejiang 310009, P.R. China
  • Pages: 3469-3475
    |
    Published online on: July 19, 2018
       https://doi.org/10.3892/mmr.2018.9299
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Abstract

The role of SUMOylation in the pathogenesis of vitiligo has not been reported previously. The present study aimed to reveal abnormalities in small ubiquitin‑like modifier (SUMO) conjugation in keratinocytes from depigmented lesions of patients with vitiligo and confirm the role of SUMOylation in keratinocytes from patients with vitiligo. Skin samples used for immunohistochemistry were obtained by punch biopsy from the depigmented lesions of 6 patients. Blisters were produced by vacuum and the roofs were collected for keratinocyte culture. HaCaT cells were transduced with SUMO1 knockdown vectors. The protein expression of SUMO1, SUMO‑specific peptidase 1 (SENP1), ubiquitin‑conjugating enzyme E2 I (Ubc9), SUMO‑activating enzyme subunit 1 (SAE1), cyclin‑dependent kinase (CDK)2, CDK6, proliferating cell nuclear antigen (PCNA), retinoblastoma protein (Rb), phosphorylated Rb (pRb) and β‑actin was assessed by western blotting. The SUMOylation status of proteins was assessed by immunoprecipitation. Cell cycle analysis was performed by flow cytometry and cell proliferation rate was investigated using a Cell Counting Kit‑8. The results demonstrated that the levels of SUMO1‑conjugated proteins were decreased in vitiligo lesions and vitiligo keratinocytes compared with normal controls. The protein expression of Ubc9 was decreased and SENP1 was increased in vitiligo keratinocytes compared with normal keratinocytes, with no alterations in SAE1 expression. Following knockdown of SUMO1 in HaCaT cells, the proliferation of HaCaT cells was reduced and the cell cycle was arrested in G1 phase. Furthermore, the protein expression levels of PCNA, CDK2, CDK6 and pRb were reduced in SUMO1‑knockdown HaCaT cells, and SUMOylated Rb was also decreased markedly in keratinocytes from lesions of patients with vitiligo compared with normal keratinocytes. In conclusion, vitiligo lesions in the present study exhibited dysregulated SUMOylation and deSUMOylation balance and dysregulation of cell cycle progression may be present in SUMO1 knockdown HaCaT cells. These results indicate that deSUMOylation of Rb of keratinocytes may serve an important role in vitiligo, providing a novel direction for the study into the mechanism of vitiligo.
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Copy and paste a formatted citation
Spandidos Publications style
Zhou M, Lin F, Xu W, Jin R and Xu A: Decreased SUMOylation of the retinoblastoma protein in keratinocytes during the pathogenesis of vitiligo. Mol Med Rep 18: 3469-3475, 2018.
APA
Zhou, M., Lin, F., Xu, W., Jin, R., & Xu, A. (2018). Decreased SUMOylation of the retinoblastoma protein in keratinocytes during the pathogenesis of vitiligo. Molecular Medicine Reports, 18, 3469-3475. https://doi.org/10.3892/mmr.2018.9299
MLA
Zhou, M., Lin, F., Xu, W., Jin, R., Xu, A."Decreased SUMOylation of the retinoblastoma protein in keratinocytes during the pathogenesis of vitiligo". Molecular Medicine Reports 18.3 (2018): 3469-3475.
Chicago
Zhou, M., Lin, F., Xu, W., Jin, R., Xu, A."Decreased SUMOylation of the retinoblastoma protein in keratinocytes during the pathogenesis of vitiligo". Molecular Medicine Reports 18, no. 3 (2018): 3469-3475. https://doi.org/10.3892/mmr.2018.9299
Copy and paste a formatted citation
x
Spandidos Publications style
Zhou M, Lin F, Xu W, Jin R and Xu A: Decreased SUMOylation of the retinoblastoma protein in keratinocytes during the pathogenesis of vitiligo. Mol Med Rep 18: 3469-3475, 2018.
APA
Zhou, M., Lin, F., Xu, W., Jin, R., & Xu, A. (2018). Decreased SUMOylation of the retinoblastoma protein in keratinocytes during the pathogenesis of vitiligo. Molecular Medicine Reports, 18, 3469-3475. https://doi.org/10.3892/mmr.2018.9299
MLA
Zhou, M., Lin, F., Xu, W., Jin, R., Xu, A."Decreased SUMOylation of the retinoblastoma protein in keratinocytes during the pathogenesis of vitiligo". Molecular Medicine Reports 18.3 (2018): 3469-3475.
Chicago
Zhou, M., Lin, F., Xu, W., Jin, R., Xu, A."Decreased SUMOylation of the retinoblastoma protein in keratinocytes during the pathogenesis of vitiligo". Molecular Medicine Reports 18, no. 3 (2018): 3469-3475. https://doi.org/10.3892/mmr.2018.9299
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