Volume 74, Issue 3 pp. 1339-1356
Original Article

Insufficient Radiofrequency Ablation Promotes Hepatocellular Carcinoma Metastasis Through N6-Methyladenosine mRNA Methylation-Dependent Mechanism

Tianhong Su

Tianhong Su

Department of Liver Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

Institute of Precision Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

These authors contributed equally to the study.Search for more papers by this author
Manling Huang

Manling Huang

Department of Gastroenterology and Hepatology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

These authors contributed equally to the study.Search for more papers by this author
Junbin Liao

Junbin Liao

Department of Liver Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

These authors contributed equally to the study.Search for more papers by this author
Shuibin Lin

Shuibin Lin

Center for Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

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Peng Yu

Peng Yu

Center for Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

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Jianhua Yang

Jianhua Yang

MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory for Biocontrol, School of Life Sciences, The Fifth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

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Yuhong Cai

Yuhong Cai

Department of Liver Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

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Shenghua Zhu

Shenghua Zhu

Department of Gastroenterology and Hepatology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

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Lixia Xu

Lixia Xu

Institute of Precision Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

Department of Oncology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

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Zhenwei Peng

Zhenwei Peng

Clinical Trials Unit, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China

Department of Radiation Oncology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China

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Sui Peng

Sui Peng

Institute of Precision Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

Department of Gastroenterology and Hepatology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

Clinical Trials Unit, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China

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Shuling Chen

Corresponding Author

Shuling Chen

Division of Interventional Ultrasound, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

ADDRESS CORRESPONDENCE AND REPRINT REQUESTS TO:

Shuling Chen, M.D.

Division of Interventional Ultrasound, The First Affiliated Hospital, Sun Yat-sen University

58 Zhong Shan Road 2

Guangzhou, 510080, China

E-mail: [email protected]

Tel.: +86-13570485828

or

Ming Kuang, M.D., Ph.D.

Department of Liver Surgery, Precision Medicine Institute, Cancer Center, The First Affiliated Hospital, Sun Yat-sen University

58 Zhong Shan Road 2

Guangzhou, 510080, China

E-mail: [email protected]

Tel.: +86-13631393958

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Ming Kuang

Corresponding Author

Ming Kuang

Department of Liver Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

Institute of Precision Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

Cancer Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China

ADDRESS CORRESPONDENCE AND REPRINT REQUESTS TO:

Shuling Chen, M.D.

Division of Interventional Ultrasound, The First Affiliated Hospital, Sun Yat-sen University

58 Zhong Shan Road 2

Guangzhou, 510080, China

E-mail: [email protected]

Tel.: +86-13570485828

or

Ming Kuang, M.D., Ph.D.

Department of Liver Surgery, Precision Medicine Institute, Cancer Center, The First Affiliated Hospital, Sun Yat-sen University

58 Zhong Shan Road 2

Guangzhou, 510080, China

E-mail: [email protected]

Tel.: +86-13631393958

Search for more papers by this author
First published: 26 February 2021
Citations: 15
Supported by the National Key Research and Development Program of China (grant no.: 2020AAA0109504), National Natural Science Foundation of China (grant nos.: 81825013, 81801703), the Natural Science Foundation for Distinguished Young Scholars of Guangdong Province, China (grant no.: 2019B151502009), the Science and Technology Program of Guangzhou, China (grant no.: 201704020099), and the National high level talents special support plan—“Ten thousand plan”—Young top-notch talent support program (grant no.: 80000-41180003). Supported also by the Bureau of Science and Information Technology of Guangzhou Municipality Pearl River S and T Nova Program of Guangzhou (grant no.: 201906010086).
Potential conflict of interest: Nothing to report.

Abstract

Background and Aims

The dynamic N6-methyladenosine (m6A) mRNA modification is essential for acute stress response and cancer progression. Sublethal heat stress from insufficient radiofrequency ablation (IRFA) has been confirmed to promote HCC progression; however, whether m6A machinery is involved in IRFA-induced HCC recurrence remains open for study.

Approach and Results

Using an IRFA HCC orthotopic mouse model, we detected a higher level of m6A reader YTH N6-methyladenosine RNA binding protein 1-3 (YTHDF1) in the sublethal-heat–exposed transitional zone close to the ablation center than that in the farther area. In addition, we validated the increased m6A modification and elevated YTHDF1 protein level in sublethal-heat–treated HCC cell lines, HCC patient-derived xenograft (PDX) mouse model, and patients’ HCC tissues. Functionally, gain-of-function/loss-of-function assays showed that YTHDF1 promotes HCC cell viability and metastasis. Knockdown of YTHDF1 drastically restrains the tumor metastasis evoked by sublethal heat treatment in tail vein injection lung metastasis and orthotopic HCC mouse models. Mechanistically, we found that sublethal heat treatment increases epidermal factor growth receptor (EGFR) m6A modification in the vicinity of the 5′ untranslated region and promotes its binding with YTHDF1, which enhances the translation of EGFR mRNA. The sublethal-heat–induced up-regulation of EGFR level was further confirmed in the IRFA HCC PDX mouse model and patients’ tissues. Combination of YTHDF1 silencing and EGFR inhibition suppressed the malignancies of HCC cells synergically.

Conclusions

The m6A-YTHDF1-EGFR axis promotes HCC progression after IRFA, supporting the rationale for targeting m6A machinery combined with EGFR inhibitors to suppress HCC metastasis after RFA.

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