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. 2022 Oct 7;14(19):4913.
doi: 10.3390/cancers14194913.

Metabolic Biomarkers Affecting Cell Proliferation and Prognosis in Polycythemia Vera

Affiliations

Metabolic Biomarkers Affecting Cell Proliferation and Prognosis in Polycythemia Vera

Ziqing Wang et al. Cancers (Basel). .

Abstract

Polycythemia vera (PV) is a malignant clonal hematological disease of hematopoietic stem cells characterized by the proliferation of peripheral blood cells, and JAK2 mutation is one of the main causes of PV peripheral blood cell proliferation. Abnormal cell metabolism is a new feature of malignant proliferation of tumor cells, but the role of metabolism in the pathogenesis and prognosis of PV remains unclear. We analyzed metabolic differences of peripheral blood sera between 32 PV patients and 20 healthy controls (HCs) by liquid chromatography-mass spectrometry (LC-MS) to investigate their relationship with cell proliferation and to screen for prognosis-related metabolic biomarkers. Compared to HC, 33 endogenous metabolites were significantly changed in PV and were involved in fatty acid metabolism, glucose metabolism, sphingolipid metabolism, and amino acid metabolism pathways. Among them, seven metabolites were closely associated with JAK2 mutations, 2 of which may contribute to the proliferation of peripheral blood cells in PV patients. A set of potential prognostic metabolic biomarkers containing four metabolites was identified by a receiver operating characteristic (ROC) curve according to the risk stratification of the PV patients and their combined AUC value of 0.952, with a sensitivity of 90.905% and specificity of 90.909% at the optimal cutoff point. Metabonomics is an important tool for the study of the pathogenesis of PV and the relationship between JAK2 gene mutation. Furthermore, the potential biomarkers of this study may provide a reference for the prognosis of PV.

Keywords: cell proliferation; metabolic biomarkers; metabolomics; polycythemia vera; prognosis.

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Conflict of interest statement

The authors have no relevant financial or non-financial interests to disclose.

Figures

Figure 1
Figure 1
Score plots of serum metabolic profiles of the PV and HC groups. (A) PLS-DA score plots for the PV and HC groups in positive mode. (B) PLS-DA score plots for the PV and HC groups in negative mode.
Figure 2
Figure 2
Metabolic pathways enrichment analysis of potential biomarkers in PV patients. 1. D-glutamine and D-glutamate metabolism. 2. Sphingolipid metabolism. 3. Pyruvate metabolism. 4. Alanine, aspartate and glutamate metabolism. 5. Arginine and proline metabolism. 6. Tryptophan metabolism. 7. Lysine degradation. 8. Arginine biosynthesis. 9. Glycolysis/gluconeogenesis.
Figure 3
Figure 3
Correlation of JAK2 mutations and mutational burden with blood cell counts. Levels of PLT (A) and HCT (B) in JAK2-mutated patients compared with non-JAK2-mutated patients. (E) WBC levels in JAK2 high mutational burden, low burden, and unmutated groups. Mean value ± standard error of the mean (SEM). Mann–Whitney U test, * p < 0.05, ** p < 0.01, ns: no significance (p > 0.05). Scatter plot of the correlation between WBC (C) and PLT (D) levels and JAK2 mutational burden. Spearman’s correlation test.
Figure 4
Figure 4
Specific metabolic profile of PV patients according to the mutational status of JAK2. (A) PLS-DA score plots for the JAK2-mutated group and non-JAK2-mutated group in positive ion mode. (B) PLS-DA score plots for the JAK2-mutated group and non-JAK2-mutated group in negative ion mode. (C) Levels of Cer(d18:2/22:6-2OH(7S, 17S)), SM(d18:0/PGF1α), CerP(d18:1/16:0), glutamic acid, lactic acid, melibiose and xylose in JAK2-mutated patients compared with non-JAK2-mutated patients. Mean value ± SEM. Mann–Whitney U test, * p < 0.05, ** p < 0.01.
Figure 5
Figure 5
Scatter plot of the correlation between Cer(d18:2/22:6-2OH(7S, 17S)) (A) and SM(d18:0/PGF1α) (B) levels and JAK2 mutational burden. Spearman’s correlation test.
Figure 6
Figure 6
Correlation of Cer(d18:2/22:6-2OH(7S, 17S)) and SM(d18:0/PGF1α) with blood cell counts. Spearman’s correlation test. (A) Scatter plot of the correlation between Cer(d18:2/22:6-2OH(7S, 17S)) and WBC levels. (B) Scatter plot of the correlation between SM(d18:0/PGF1α) and WBC levels. (C) Scatter plot of the correlation between SM(d18:0/PGF1α) and PLT levels.
Figure 7
Figure 7
Potential biomarkers related to the prognosis of PV patients. (A) Levels of Cer(d18:2/22:6-2OH(7S, 17S)), SM(d18:0/PGF1α), CerP(d18:1/16:0), octadec-13-enoylcarnitine, glutamic acid, lactic acid, melibiose and 1-pyrroline-5-carboxylic acid in intermediate/high-risk patients compared with low-risk patients. Mean value ± SEM. Mann–Whitney U test, * p < 0.05, ** p < 0.01. (B) ROC curve analysis for the combination of 4 biomarkers.

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