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Effects of RFRP‑3 on an ovariectomized estrogen‑primed rat model and HEC‑1A human endometrial carcinoma cells

  • Authors:
    • Xueying Zhao
    • Lina Si
    • Lin Niu
    • Meng Wei
    • Fengxia Wang
    • Xiaochao Liu
    • Zhihong Chen
    • Yuebing Qiao
    • Luyang Cheng
    • Songhe Yang
  • View Affiliations / Copyright

    Affiliations: Department of Immunology, Chengde Medical University, Chengde, Hebei 067000, P.R. China, Department of Human Anatomy, Chengde Medical University, Chengde, Hebei 067000, P.R. China
    Copyright: © Zhao et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Article Number: 76
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    Published online on: December 23, 2022
       https://doi.org/10.3892/etm.2022.11775
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Abstract

The hypothalamic peptide gonadotropin inhibitory hormone (GnIH) is a relatively novel hypothalamic neuropeptide, identified in 2000. It can influence the hypothalamic‑pituitary‑gonadal axis and reproductive function through various neuroendocrine systems. The present study aimed to explore the effects and potential underlying molecular mechanism of RFamide‑related peptide‑3 (RFRP‑3) injection on the uterine fluid protein profile of ovariectomized estrogen‑primed (OEP) rats using proteomics. In addition, the possible effects of RFRP‑3 on the viability and apoptosis of the human endometrial cancer cell line HEC‑1A and associated molecular mechanism were investigated. The OEP rat model was established through injection with GnIH/RFRP‑3 through the lateral ventricle. At 6 h after injection, the protein components of uterine fluid of rats in the experimental and control groups were analyzed using liquid chromatography (LC)‑tandem mass spectrometry (MS/MS). Differentially expressed proteins (DEPs) were analyzed using the Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) databases. Protein‑protein interactions (PPI) were investigated using the STRING database. PPI networks were then established before hub proteins were selected using OmicsBean software. The expression of one of the hub proteins, Kras, was then detected using western blot analysis. Cell Counting Kit‑8, Annexin V‑FITC/PI, reverse transcription‑quantitative PCR and western blotting were also performed to analyze cell viability and apoptosis. In total, 417 DEPs were obtained using LC‑MS/MS, including 279 upregulated and 138 downregulated proteins. GO analysis revealed that the majority of the DEPs were secretory proteins. According to KEGG enrichment analysis, the DEPs found were generally involved in tumor‑associated pathways. In particular, five hub proteins, namely G protein subunit α (Gna)13, Gnaq, Gnai3, Kras and MMP9, were obtained following PPI network analysis. Western blot analysis showed that expression of the hub protein Kras was downregulated following treatment with 10,000 ng/ml RFRP‑3. RFRP‑3 treatment (10,000 ng/ml) also suppressed HEC‑1A cell viability, induced apoptosis, downregulated Bcl‑2 and upregulated Bax protein expression, compared with those in the control group. In addition, compared with those in the control group, RFRP‑3 significantly reduced the mRNA expression levels of PI3K, AKT and mTOR, while upregulating those of LC3‑II. Compared with those in the control group, RFRP‑3 significantly decreased the protein expression levels of PI3K, AKT, mTOR and p62, in addition to decreasing AKT phosphorylation. By contrast, RFRP‑3 significantly increased the LC3‑II/I ratio and G protein‑coupled receptor 147 (GPR147) protein expression. In conclusion, the present data suggest that RFRP‑3 can alter the protein expression profile of the uterine fluid of OEP rats by upregulating MMP9 expression whilst downregulating that of key hub proteins Gna13, GnaQ, Gnai3 and Kras. Furthermore, RFRP‑3 can inhibit HEC‑1A cell viability while promoting apoptosis. The underlying molecular mechanism may involve activation of GPR147 receptor by the direct binding of RFRP‑3, which further downregulates the hub protein Kras to switch on the PI3K/AKT/mTOR pathway. This subsequently reduces the Bcl‑2 expression and promotes Bax expression to induce autophagy.
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Copy and paste a formatted citation
Spandidos Publications style
Zhao X, Si L, Niu L, Wei M, Wang F, Liu X, Chen Z, Qiao Y, Cheng L, Yang S, Yang S, et al: Effects of RFRP‑3 on an ovariectomized estrogen‑primed rat model and HEC‑1A human endometrial carcinoma cells. Exp Ther Med 25: 76, 2023.
APA
Zhao, X., Si, L., Niu, L., Wei, M., Wang, F., Liu, X. ... Yang, S. (2023). Effects of RFRP‑3 on an ovariectomized estrogen‑primed rat model and HEC‑1A human endometrial carcinoma cells. Experimental and Therapeutic Medicine, 25, 76. https://doi.org/10.3892/etm.2022.11775
MLA
Zhao, X., Si, L., Niu, L., Wei, M., Wang, F., Liu, X., Chen, Z., Qiao, Y., Cheng, L., Yang, S."Effects of RFRP‑3 on an ovariectomized estrogen‑primed rat model and HEC‑1A human endometrial carcinoma cells". Experimental and Therapeutic Medicine 25.2 (2023): 76.
Chicago
Zhao, X., Si, L., Niu, L., Wei, M., Wang, F., Liu, X., Chen, Z., Qiao, Y., Cheng, L., Yang, S."Effects of RFRP‑3 on an ovariectomized estrogen‑primed rat model and HEC‑1A human endometrial carcinoma cells". Experimental and Therapeutic Medicine 25, no. 2 (2023): 76. https://doi.org/10.3892/etm.2022.11775
Copy and paste a formatted citation
x
Spandidos Publications style
Zhao X, Si L, Niu L, Wei M, Wang F, Liu X, Chen Z, Qiao Y, Cheng L, Yang S, Yang S, et al: Effects of RFRP‑3 on an ovariectomized estrogen‑primed rat model and HEC‑1A human endometrial carcinoma cells. Exp Ther Med 25: 76, 2023.
APA
Zhao, X., Si, L., Niu, L., Wei, M., Wang, F., Liu, X. ... Yang, S. (2023). Effects of RFRP‑3 on an ovariectomized estrogen‑primed rat model and HEC‑1A human endometrial carcinoma cells. Experimental and Therapeutic Medicine, 25, 76. https://doi.org/10.3892/etm.2022.11775
MLA
Zhao, X., Si, L., Niu, L., Wei, M., Wang, F., Liu, X., Chen, Z., Qiao, Y., Cheng, L., Yang, S."Effects of RFRP‑3 on an ovariectomized estrogen‑primed rat model and HEC‑1A human endometrial carcinoma cells". Experimental and Therapeutic Medicine 25.2 (2023): 76.
Chicago
Zhao, X., Si, L., Niu, L., Wei, M., Wang, F., Liu, X., Chen, Z., Qiao, Y., Cheng, L., Yang, S."Effects of RFRP‑3 on an ovariectomized estrogen‑primed rat model and HEC‑1A human endometrial carcinoma cells". Experimental and Therapeutic Medicine 25, no. 2 (2023): 76. https://doi.org/10.3892/etm.2022.11775
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