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Up-Regulation of Toll-Like Receptors 2 and 4 on Peripheral Monocytes After Major Abdominal Surgical Operation

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Abstract

Background

This study is to investigate the time-course expression of TLR2 and TLR4 on peripheral monocytes in patients receiving major abdominal surgical operation.

Methods

Blood samples were obtained from peripheral vein before and after an operation in 30 patients with gastrointestinal or pancreatic surgery. The mRNA expression of TLR2, TLR4, TNF-α and IL-6 on peripheral blood mononuclear cells (PBMC) was analyzed by real-time PCR. The expressions of TLR2, TLR4, HLA-DR, CD80, and CD86 on monocytes were analyzed by flow cytometry. The expressions of TLR2 and TLR4 on monocytes responding to each agonist (zymosan and lipopolysaccharide) were also measured by flow cytometry.

Results

TLR2 and TLR4 mRNA showed significant up-regulation after the completion of the operation when compared with those before the operation. TLR2 expression reached its peak level on day 1 and TLR4 on days 1 and 3. There was no significant difference between pre- and post-operation in the expressions of HLA-DR, CD80 and CD86. Stimulation with zymosan, increased the expression of TLR2 significantly after the operation and reached its highest value on day 3. Similarly, after stimulation with lipopolysaccharide, the expression of TLR4 was also increased and the highest level was observed on day 1. The expression of TNF-α and IL-6 mRNA decreased after completion of the operation and gradually returned to basal level.

Conclusions

The expressions of TLR2 and TLR4 on monocytes were up-regulated during the early period after a major abdominal surgical operation in patients, which might be related to the activation of innate immunity.

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Acknowledgments

The authors acknowledge partial support from the grants of National Natural Science Foundation (81070356) and Key Funding project of Science and Technology Commission of Shanghai Municipality (09411952200). The authors thank Dr. Lu Hui for revision of this manuscript.

Conflict of interest

None.

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Authors and Affiliations

  1. Research Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China

    Li Jianfang, Xie Junjie, Shi Mingming, Jin Jiabin, Shen Baiyong, Deng Xiaxing, Zhan Xi & Chen Hao

  2. Department of Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China

    Xie Junjie, Jin Jiabin, Shen Baiyong, Deng Xiaxing, Zhan Xi & Chen Hao

Authors
  1. Li Jianfang
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  2. Xie Junjie
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  3. Shi Mingming
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  4. Jin Jiabin
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  5. Shen Baiyong
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  6. Deng Xiaxing
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  7. Zhan Xi
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  8. Chen Hao
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Corresponding author

Correspondence to Chen Hao.

Additional information

Li Jianfang and Xie Junjie contributed equally.

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Jianfang, L., Junjie, X., Mingming, S. et al. Up-Regulation of Toll-Like Receptors 2 and 4 on Peripheral Monocytes After Major Abdominal Surgical Operation. Dig Dis Sci 58, 942–949 (2013). https://doi.org/10.1007/s10620-012-2459-y

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  • DOI: https://doi.org/10.1007/s10620-012-2459-y

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