Monoclonal antibody to the six-transmembrane epithelial antigen of prostate 4 promotes apoptosis and inhibits proliferation and glucose uptake in human adipocytes

  • Authors:
    • Da-Ni Qin
    • Chun-Zhao Kou
    • Yu-Hui Ni
    • Chun-Mei Zhang
    • Jin-Gai Zhu
    • Chun Zhu
    • Yan-Ping Wang
    • Guan-Zhong Zhu
    • Chunmei Shi
    • Chen-Bo Ji
    • Xi-Rong Guo
  • View Affiliations

  • Published online on: December 1, 2010     https://doi.org/10.3892/ijmm_00000528
  • Pages: 803-811
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Abstract

We previously identified the six-transmembrane epithelial antigen of prostate (STEAP) 4 as a novel plasma membrane protein that is up-regulated in obese patients and may play a significant role in the development of human obesity. In this study, a STEAP4-specific antibody was used to characterize the biological functions of the STEAP4 protein in human adipocytes. Cell viability assays (Trypan Blue exclusion), CCK-8 assays and cell cycle analysis showed that the STEAP4 antibody inhibited pre-adipocyte proliferation. Morphological observations by electron microscopy and confocal laser microscopy, annexin V-FITC labeling, caspase-3 and caspase-8 activity assays as well as data from quantitative real-time RT-PCR (qPCR) further determined that the STEAP4 antibody could promote apoptosis in pre-adipocytes. Based on quantitative Oil Red O staining and the expression profiles of specific markers, we demonstrated that the STEAP4 antibody did not affect adipogenesis, but the 2-deoxy-d-[3H]-glucose uptake tests showed that it induced the insulin-stimulated glucose uptake in mature human adipocytes. In conclusion, our results demonstrated that the STEAP4 antibody does not influence human adipocyte differentiation, but it is likely that the STEAP4 protein regulates proliferation and apoptosis and plays an important role in modulating the insulin sensitivity of human adipocytes.

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December 2010
Volume 26 Issue 6

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos Publications style
Qin D, Kou C, Ni Y, Zhang C, Zhu J, Zhu C, Wang Y, Zhu G, Shi C, Ji C, Ji C, et al: Monoclonal antibody to the six-transmembrane epithelial antigen of prostate 4 promotes apoptosis and inhibits proliferation and glucose uptake in human adipocytes . Int J Mol Med 26: 803-811, 2010.
APA
Qin, D., Kou, C., Ni, Y., Zhang, C., Zhu, J., Zhu, C. ... Guo, X. (2010). Monoclonal antibody to the six-transmembrane epithelial antigen of prostate 4 promotes apoptosis and inhibits proliferation and glucose uptake in human adipocytes . International Journal of Molecular Medicine, 26, 803-811. https://doi.org/10.3892/ijmm_00000528
MLA
Qin, D., Kou, C., Ni, Y., Zhang, C., Zhu, J., Zhu, C., Wang, Y., Zhu, G., Shi, C., Ji, C., Guo, X."Monoclonal antibody to the six-transmembrane epithelial antigen of prostate 4 promotes apoptosis and inhibits proliferation and glucose uptake in human adipocytes ". International Journal of Molecular Medicine 26.6 (2010): 803-811.
Chicago
Qin, D., Kou, C., Ni, Y., Zhang, C., Zhu, J., Zhu, C., Wang, Y., Zhu, G., Shi, C., Ji, C., Guo, X."Monoclonal antibody to the six-transmembrane epithelial antigen of prostate 4 promotes apoptosis and inhibits proliferation and glucose uptake in human adipocytes ". International Journal of Molecular Medicine 26, no. 6 (2010): 803-811. https://doi.org/10.3892/ijmm_00000528