Store-operated Ca2+ entry mediated regulation of polarization in differentiated human neutrophil-like HL-60 cells under hypoxia

  • Authors:
    • Shuang Ma
    • Chunqing Cai
    • Yan Ma
    • Zhengzhong Bai
    • Xiaojing Meng
    • Xinyi Yang
    • Fei Zou
    • Rili Ge
  • View Affiliations

  • Published online on: January 13, 2014     https://doi.org/10.3892/mmr.2014.1894
  • Pages: 819-824
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Abstract

The regulation of neutrophil polarization by calcium entry is critical for maintaining an effective host response. Hypoxia has a major effect on the apoptosis of neutrophils, however the role of store-operated Ca2+ entry (SOCE) in neutrophil polarization under hypoxia remains to be elucidated. In the present study, we examined the polarization of differentiated human neutrophil-like HL-60 (dHL-60) cells exposed to hypoxia (3% O2) and the results demonstrated that the percentage of polarized cells following exposure to an N-formyl-Met-Leu-Phe (fMLP) gradient in the Zigmond chamber was increased. We examined stromal interaction molecule 1 (STIM1) and Orai1 expression in dHL-60 cells during hypoxia, and it was observed that the expression of STIM1 and Orai1 was significantly reduced at day 2. However, no apparent change was observed on the first day, indicating that this effect is dependent on stimulation time. Fluo-4/acetoxymethyl (AM) ester imaging also demonstrated that SOCE was decreased in dHL-60 cells. The plasmid overexpression assay demonstrated that the response of polarization was returned to the control level. We demonstrated the inhibitory role of SOCE on the polarization of dHL-60 cells under hypoxic conditions, which may be the mechanism for the adaptation of neutrophils to hypoxia. SOCE is also suggested to be a key modulator of immune deficiency under hypoxic conditions and is potentially a therapeutic target.
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2014-March
Volume 9 Issue 3

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Spandidos Publications style
Ma S, Cai C, Ma Y, Bai Z, Meng X, Yang X, Zou F and Ge R: Store-operated Ca2+ entry mediated regulation of polarization in differentiated human neutrophil-like HL-60 cells under hypoxia. Mol Med Rep 9: 819-824, 2014
APA
Ma, S., Cai, C., Ma, Y., Bai, Z., Meng, X., Yang, X. ... Ge, R. (2014). Store-operated Ca2+ entry mediated regulation of polarization in differentiated human neutrophil-like HL-60 cells under hypoxia. Molecular Medicine Reports, 9, 819-824. https://doi.org/10.3892/mmr.2014.1894
MLA
Ma, S., Cai, C., Ma, Y., Bai, Z., Meng, X., Yang, X., Zou, F., Ge, R."Store-operated Ca2+ entry mediated regulation of polarization in differentiated human neutrophil-like HL-60 cells under hypoxia". Molecular Medicine Reports 9.3 (2014): 819-824.
Chicago
Ma, S., Cai, C., Ma, Y., Bai, Z., Meng, X., Yang, X., Zou, F., Ge, R."Store-operated Ca2+ entry mediated regulation of polarization in differentiated human neutrophil-like HL-60 cells under hypoxia". Molecular Medicine Reports 9, no. 3 (2014): 819-824. https://doi.org/10.3892/mmr.2014.1894