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Effects of PGE1 on the ERS pathway in neonatal rats with hyperoxic lung injury

Abstract

Background

With the increase in the number of low birth weight infants, oxygen therapy is more widely used. However, chronic high-concentration oxygen environments lead to hyperoxic lung injury in children, which in turn leads to bronchopulmonary dysplasia (BPD). PGE1 is widely used in the clinic for its ability to inhibit inflammation and improve circulation. Therefore, we further investigated whether PGE-1 has a therapeutic effect on hyperoxic lung injury.

Methods

Hyperoxic lung injury model was adopted for investigating the interventional effects and underlying mechanisms of intraperitoneal injection of prostaglandin E1 (PGE-1) on hyperoxic lung injury in newborn rats via relevant experimental techniques, such as Diff-Quick staining, lung wet dry specific gravity measurements, HE staining, TUNEL staining, ELISA, and the Western blot method.

Results

Inflammatory and apoptotic cells in the PGE1-treated group were significantly lower than those in the hyperoxic lung injury group (p < 0.05); and the contents of IL-1β, IL-6 and TNF-α in the treated group were significantly lower than those in the model group (p < 0.05). Caspase-3, CHOP, GRP78 and Bcl-2/Bax protein expression in the treatment group was significantly lower than that in the model group (p < 0.05).

Conclusion

PGE-1 has a therapeutic effect on hyperoxic lung injury in neonatal rats.

Impact

  • PGE1 treatment reduces levels of inflammatory cells and pro-inflammatory cytokines and decreases apoptosis.

  • PGE1 has a therapeutic effect on BPD through the endoplasmic reticulum stress pathway.

  • This study offers the possibility of PGE1 for the treatment of BPD.

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Fig. 1: Changes in the body weight of neonatal rats in each group (n = 10).
Fig. 2: Determination of the W/D ratio in the lung tissue of each group (n = 10).
Fig. 3
Fig. 4
Fig. 5: Contents of leukocytes in the BALF of neonatal rats from diverse groups (n = 10).
Fig. 6
Fig. 7: Apoptosis indices of neonatal rat lung tissues from the different groups (n = 10, \(\bar{{{{{{\rm{X}}}}}}}\pm {{{{{\rm{S}}}}}}\)).
Fig. 8: IL-1β levels in lung tissues from neonatal rats in each group at different time points (n = 10,\(\bar{x}\pm s\)).
Fig. 9: IL-6 levels in lung tissues from neonatal rats in each group at varying time points (n = 10).
Fig. 10: TNF-α levels in lung tissues from neonatal rats in each group at varying time points (n = 10).
Fig. 11
Fig. 12: Changes in CHOP protein levels in lung tissues from different periods in each group.
Fig. 13: Changes in GRP78 protein levels in lung tissues from each group at different time points.
Fig. 14: Changes in caspase-3 protein expression in lung tissues from different groups at different time points.
Fig. 15: Changes in the Bcl2/Bax ratio in lung tissues from different groups at different time points.

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Data availability

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Authors and Affiliations

Authors

Contributions

Zhenlin Yang contributed to the performed the experiments and wrote the original draft of the manuscript. Zhengyong Jin and Jinzi Li performed the relevant literature research and revised the manuscript. Jianing Song and Fan Gao contributed to the literature search and processing of the findings. Jingjing Guo, Jiarui Li and Weiwei Zheng contributed reagents, materials, and analysis tools; all authors read and approved the final manuscript for publication.

Corresponding author

Correspondence to Jinzi Li.

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Competing interests

The authors declare no competing interests.

Ethical approval

All animal experiments were carried out according to the ethical policies and the procedures approved by the Institutional Animal Use and Care Committee of Yanbian University of Science and Technology.

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Yang, Z., Song, J., Guo, J. et al. Effects of PGE1 on the ERS pathway in neonatal rats with hyperoxic lung injury. Pediatr Res 97, 835–842 (2025). https://doi.org/10.1038/s41390-024-03381-3

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