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General Research Article

SFXN3 is Associated with Poor Clinical Outcomes and Sensitivity to the Hypomethylating Therapy in Non-M3 Acute Myeloid Leukemia Patients

Author(s): Yuxuan Dong, Fengbo Jin, Jing Wang, Qingsheng Li, Zhenqi Huang, Leiming Xia* and Mingzhen Yang*

Volume 23, Issue 5, 2023

Published on: 01 August, 2023

Page: [410 - 418] Pages: 9

DOI: 10.2174/1566523223666230724121515

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Abstract

Background: DNA hypermethylation plays a critical role in the occurrence and progression of acute myeloid leukemia (AML). The mitochondrial serine transporter, SFXN3, is vital for onecarbon metabolism and DNA methylation. However, the impact of SFXN3 on the occurrence and progression of AML has not been reported yet.

Objective: In this study, we hypothesized that SFXN3 indicates a poor prognosis and suggested tailored treatment for AML patients.

Methods: We used GEPIA and TCGA repository data to analyze the expression of SFXN3 and its correlation with survival in AML patients. RT-qPCR was used to detect the SFXN3 level in our enrolled AML patients and volunteers. Additionally, Whole Genome Bisulfite Sequencing (WGBS) was used to detect the genomic methylation level in individuals.

Results: Through the TCGA and GEPIA databases, we found that SFXN3 was enriched in AML patients, predicting shorter survival. Furthermore, we confirmed that SFXN3 was primarily overexpressed in AML patients, especially non-M3 patients, and that high SFXN3 in non-M3 AML patients was found to be associated with poor outcomes and frequent blast cells. Interestingly, non-M3 AML patients with high SFXN3 levels who received hypomethylating therapy showed a higher CR ratio. Finally, we found that SFXN3 could promote DNA methylation at transcription start sites (TSS) in non-M3 AML patients. These sites were found to be clustered in multiple vital cell functions and frequently accompanied by mutations in DNMT3A and NPM1.

Conclusion: In conclusion, SXFN3 plays an important role in the progression and hypermethylation in non-M3 AML patients and could be a potential biomarker for indicating a high CR rate for hypomethylating therapy.

Keywords: Acute Myeloid Leukemia (AML), SFXN3 (Sideroflexin3), DNA methylation, epigenetics, hypomethylating therapy, outcome.

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