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  • Clinical Research Article
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T-cell lymphopenia is associated with an increased infecting risk in children after cardiopulmonary bypass

Abstract

Background

children who undergo CPB operations are at an elevated risk of infection due to immunosuppression. This study aims to investigate the association between lymphopenia following CPB and early postoperative infection in children.

Methods

A retrospective analysis including 41 children under 2 years old underwent CPB. Among them, 9 subjects had an early postoperative infection, and 32 subjects were period-matched without infection. Inflammatory cytokines, serum CRP and PCT values were measured in plasma, additionally, circulating total leucocyte and lymphocyte subpopulations were counted.

Results

Infected subjects exhibited significantly higher levels of inflammatory cytokines, including IL-6, IL-8, IL-10, IL-1β and TNF-α, than non-infected subjects after CPB. Additionally, lower absolute number of lymphocyte and their subpopulations CD3+ T cells, CD4+ T-helper cells and CD8+cytotoxic T-cells, were observed in infected subjects. The impairment of T-cells Immune was found to be associated with higher levels of inflammatory cytokines IL-10. The ROC demonstrated that the absolute number of CD3+ T-cells <1934/ul, CD4+ T helper cells <1203/ul and CD8+cytotoxic T-cells <327/ul were associated with early postoperative infection.

Conclusion

Higher levels of inflammatory cytokines resulted in T-cells lymphopenia after CPB, which significantly increasing the risk of postoperative infection in infants and young children.

Impact

  • Infection complications after cardiopulmonary bypass (CPB) in pediatric CHD patients are serious issues, identifing the infection from after CPB remains a challenging.

  • CPB can release numerous inflammatory cytokines associated with T cells lymphopenia, which increases the risk of postoperative infection after surgery.

  • Monitoring T cells lymphopenia maybe more beneficial to predict early postoperative infection than C-reactive protein and procalcitonin.

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Fig. 1: Impact of CPB on inflammatory cytokines levels in the infected subject and non-infected subjects.
Fig. 2: Impact of CPB on Lymphocyte subsets in the infected subject and non-infected subjects.

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Data availability

The datasets used and analyzed during the current study are available from the corresponding author upon reasonable request.

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Acknowledgements

We thank all the members at the Department of pediatric cardiology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine for supporting.

Funding

This work was supported by Xinhua Hospital&Shanghai Jiao Tong University Joint Project (Grant number: 21XJMR04).

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Authors and Affiliations

Authors

Contributions

W.L. was involved in gathering data, formal analysis and writing original draft, J.H. conceived the study and revised manuscript, H.W., W.S. and J.X. supported gathering data, ongxuan Peng and W.L. contributed to analyzing and interpreting data, Y.L., K.B. and S.C. revised the manuscript.

Corresponding author

Correspondence to Ji-hong Huang.

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Competing interests

The authors declare no competing interests.

Ethics

This work was approved by the Xinhua Hospital Ethics Committee (approval number: XHEC-QT-2021-042). All procedures were followed in accordance with the ethical standards of the responsible committee on human experimentation (institutional or regional) and with the Helsinki Declaration of 1975. Informed consent was not required in the present study.

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Li, WJ., Peng, YX., Zhao, LQ. et al. T-cell lymphopenia is associated with an increased infecting risk in children after cardiopulmonary bypass. Pediatr Res 95, 227–232 (2024). https://doi.org/10.1038/s41390-023-02765-1

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