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Article Open Access

Identification of amino acid metabolism‑related genes as diagnostic and prognostic biomarkers in sepsis through machine learning

  • Authors:
    • Ye Wen
    • Qian Liu
    • Wei Xu
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    Affiliations: Department of Emergency, Xianning Central Hospital, The First Affiliated Hospital of Hubei University of Science and Technology, Xianning, Hubei 437199, P.R. China
    Copyright: © Wen et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Article Number: 36
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    Published online on: December 20, 2024
       https://doi.org/10.3892/etm.2024.12786
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Abstract

Previous research has highlighted the critical role of amino acid metabolism (AAM) in the pathophysiology of sepsis. The present study aimed to explore the potential diagnostic and prognostic value of AAM‑related genes (AAMGs) in sepsis, as well as their underlying molecular mechanisms. Gene expression profiles from the Gene Expression Omnibus (GSE65682, GSE185263 and GSE154918 datasets) were analyzed. Based on weighted gene co‑expression network analysis and machine learning algorithms, hub AAMGs were identified in the GSE65682 database. Subsequently, hub AAMGs were evaluated for their expression levels and diagnostic and prognostic significance in sepsis, as well as their interactions with regulatory pathways and role in immune cell infiltration. Additionally, trends in AAMG expression were validated using clinical samples, and their functions in sepsis were confirmed through an in vitro model. In total, four AAMGs were identified, two of which, methionine synthase (MTR) and methionine‑R‑isomerase 1 (MRI1), demonstrated significant differential expression in the GSE65682, GSE185263 and GSE154918 datasets, which was further validated using clinical samples. A diagnostic nomogram based on MTR and MRI1 expression demonstrated strong diagnostic effectiveness across the three aforementioned databases. Moreover, the expression of both genes were negatively correlated with sepsis prognosis and showed stratified prognostic capabilities. Newly identified pathways included KRAS and IL‑2/STAT5 signaling. MTR and MRI1 negatively correlated with the infiltration of inflammatory cells, such as M1 macrophages and neutrophils, and positively correlated with anti‑inflammatory cells, such as CD8+ T and dendritic cells. In vitro experiments further demonstrated that overexpression of MTR could mitigate the inhibition of cloning and proliferation induced by LPS and ATP in RAW 264.7 cells. These findings highlighted the potential of MTR and MRI1 as biomarkers for diagnosing and prognosticating sepsis, potentially acting through the regulation of methionine in the pathophysiology of this disease. The present study provided new insights into the role of AAM in the mechanisms underlying sepsis and in the potential development of future targeted therapies.
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Copy and paste a formatted citation
Spandidos Publications style
Wen Y, Liu Q and Xu W: Identification of amino acid metabolism‑related genes as diagnostic and prognostic biomarkers in sepsis through machine learning. Exp Ther Med 29: 36, 2025.
APA
Wen, Y., Liu, Q., & Xu, W. (2025). Identification of amino acid metabolism‑related genes as diagnostic and prognostic biomarkers in sepsis through machine learning. Experimental and Therapeutic Medicine, 29, 36. https://doi.org/10.3892/etm.2024.12786
MLA
Wen, Y., Liu, Q., Xu, W."Identification of amino acid metabolism‑related genes as diagnostic and prognostic biomarkers in sepsis through machine learning". Experimental and Therapeutic Medicine 29.2 (2025): 36.
Chicago
Wen, Y., Liu, Q., Xu, W."Identification of amino acid metabolism‑related genes as diagnostic and prognostic biomarkers in sepsis through machine learning". Experimental and Therapeutic Medicine 29, no. 2 (2025): 36. https://doi.org/10.3892/etm.2024.12786
Copy and paste a formatted citation
x
Spandidos Publications style
Wen Y, Liu Q and Xu W: Identification of amino acid metabolism‑related genes as diagnostic and prognostic biomarkers in sepsis through machine learning. Exp Ther Med 29: 36, 2025.
APA
Wen, Y., Liu, Q., & Xu, W. (2025). Identification of amino acid metabolism‑related genes as diagnostic and prognostic biomarkers in sepsis through machine learning. Experimental and Therapeutic Medicine, 29, 36. https://doi.org/10.3892/etm.2024.12786
MLA
Wen, Y., Liu, Q., Xu, W."Identification of amino acid metabolism‑related genes as diagnostic and prognostic biomarkers in sepsis through machine learning". Experimental and Therapeutic Medicine 29.2 (2025): 36.
Chicago
Wen, Y., Liu, Q., Xu, W."Identification of amino acid metabolism‑related genes as diagnostic and prognostic biomarkers in sepsis through machine learning". Experimental and Therapeutic Medicine 29, no. 2 (2025): 36. https://doi.org/10.3892/etm.2024.12786
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