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. 2022 Dec 2;17(12):e0278708.
doi: 10.1371/journal.pone.0278708. eCollection 2022.

Characterization of a proteomic profile associated with organ dysfunction and mortality of sepsis and septic shock

Adolfo Ruiz-Sanmartín  1   2   3 , Vicent Ribas  4 , David Suñol  4 , Luis Chiscano-Camón  1   2   3 , Clara Palmada  1   2 , Iván Bajaña  1   2 , Nieves Larrosa  5   6   7 , Juan José González  5   6   7 , Núria Canela  8 , Ricard Ferrer  1   2   3 , Juan Carlos Ruiz-Rodríguez  1   2   3
Affiliations

Characterization of a proteomic profile associated with organ dysfunction and mortality of sepsis and septic shock

Adolfo Ruiz-Sanmartín et al. PLoS One. .

Abstract

Introduction: The search for new biomarkers that allow an early diagnosis in sepsis and predict its evolution has become a necessity in medicine. The objective of this study is to identify, through omics techniques, potential protein biomarkers that are expressed in patients with sepsis and their relationship with organ dysfunction and mortality.

Methods: Prospective, observational and single-center study that included adult patients (≥ 18 years) who were admitted to a tertiary hospital and who met the criteria for sepsis. A mass spectrometry-based approach was used to analyze the plasma proteins in the enrolled subjects. Subsequently, using recursive feature elimination classification and cross-validation with a vector classifier, an association of these proteins with mortality and organ dysfunction was established. The protein-protein interaction network was analyzed with String software.

Results: 141 patients were enrolled in this study. Mass spectrometry identified 177 proteins. Of all of them, and by recursive feature elimination, nine proteins (GPX3, APOB, ORM1, SERPINF1, LYZ, C8A, CD14, APOC3 and C1QC) were associated with organ dysfunction (SOFA > 6) with an accuracy of 0.82 ± 0.06, precision of 0.85 ± 0.093, sensitivity 0.81 ± 0.10, specificity 0.84 ± 0.10 and AUC 0.82 ± 0.06. Twenty-two proteins (CLU, LUM, APOL1, SAA1, CLEBC3B, C8A, ITIH4, KNG1, AGT, C7, SAA2, APOH, HRG, AFM, APOE, APOC1, C1S, SERPINC1, IGFALS, KLKB1, CFB and BTD) were associated with mortality with an accuracy of 0.86 ± 0.05, a precision of 0.91 ± 0.05, a sensitivity of 0.91 ± 0.05, a specificity of 0.72 ± 0.17, and an area under the curve (AUC) of 0.81 ± 0.08 with a confidence interval of 95%.

Conclusion: In sepsis there are proteomic patterns associated with organ dysfunction and mortality.

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Conflict of interest statement

The authors have declared that no competing interests exist.

Figures

Fig 1
Fig 1
Relationship between proteins (strings): A) organ dysfunction, B) Mortality (https://string-db.org/).
Fig 2
Fig 2. Shap values graphics.
A) blue = proteins expressed in patients with SOFA ≤ 6, red = proteins expressed in patients with SOFA > 6. B) blue = proteins expressed in patients survivors, red = proteins expressed in patients non-survivors.
See this image and copyright information in PMC

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