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Genome-wide CRISPR screen reveals SGOL1 as a druggable target of sorafenib-treated hepatocellular carcinoma

Laboratory Investigationvolume 98pages734744 (2018) | Download Citation

Abstract

The genome-wide clustered regularly interspaced short palindromic repeats (CRISPR) screen is a powerful tool used to identify therapeutic targets that can be harnessed for cancer treatment. This study aimed to assess the efficacy of genome-wide CRISPR screening to identify druggable genes associated with sorafenib-treated hepatocellular carcinoma (HCC). A genome-scale CRISPR knockout (GeCKO v2) library containing 123,411 single guide RNAs (sgRNAs) was used to identify loss-of-function mutations conferring sorafenib resistance upon HCC cells. Resistance gene screens identified SGOL1 as an indicator of prognosis of patients treated with sorafenib. Of the 19,050 genes tested, the knockout screen identified inhibition of SGOL1 expression as the most-effective genetic suppressor of sorafenib activity. Analysis of the survival of 210 patients with HCC after hepatic resection revealed that high SGOL1 expression shortened overall survival (P = 0.021). Further, matched pairs analysis of the TCGA database revealed that SGOL1 is differentially expressed. When we used a lentivirus Cas9 vector to determine the effect of targeting SGOL1 with a specific sgRNA in HCC cells, we found that SGOL1 expression was efficiently inhibited and that loss of SGOL1 was associated with sorafenib resistance. Further, loss of SGOL1 from HCC cell decreased the cytotoxicity of sorafenib in vivo. We conclude that the CRISPR screen is a powerful tool for therapeutic target analysis of sorafenib treatment and that SGOL1 serves as a druggable target for HCC treated with sorafenib and an indicator of prognosis.

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Additional information

Ethics approval and consent to participate. The use of nude mice in this study was approved by the Medical Ethics Committee of the First Affiliated Hospital of Zhejiang University. The informed consent of the HCC samples was obtained from all patients.

These authors contributed equally: Weijian Sun, Bin He, and Beng Yang.

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Acknowledgements

We are grateful to Xiao-Hu Zhou and Xiao-Lei Zhang for technical assistance and helpful suggestions.

Funding

This work was supported by Innovative Research Groups of the National Natural Science Foundation of China (No. 81421062), the Major program of National Natural Science Foundation of China (No.91542205), the National S&T Major Project of China (No. 2012ZX10002017), Zhejiang Provincial Natural Science Foundation of China (LY18H160046), and Zhejiang Medical Science Foundation (2018KY532).

Author information

Author notes

  1. Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases.

Affiliations

  1. Department of Surgery, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, 325027, China

    • Weijian Sun
    •  & Xian Shen
  2. Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China

    • Weijian Sun
    • , Bin He
    • , Beng Yang
    • , Wendi Hu
    • , Shaobing Cheng
    • , Heng Xiao
    • , Zhengjie Yang
    • , Xiaoyu Wen
    • , Lin Zhou
    • , Haiyang Xie
    • , Jian Wu
    •  & Shusen Zheng
  3. Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, Zhejiang Province, Hangzhou, 310003, China

    • Weijian Sun
    • , Bin He
    • , Beng Yang
    • , Wendi Hu
    • , Shaobing Cheng
    • , Heng Xiao
    • , Zhengjie Yang
    • , Xiaoyu Wen
    • , Lin Zhou
    • , Haiyang Xie
    • , Jian Wu
    •  & Shusen Zheng
  4. Key Laboratory of Organ Transplantation, Zhejiang Province, Hangzhou, 310003, China

    • Weijian Sun
    • , Bin He
    • , Beng Yang
    • , Wendi Hu
    • , Shaobing Cheng
    • , Heng Xiao
    • , Zhengjie Yang
    • , Xiaoyu Wen
    • , Lin Zhou
    • , Haiyang Xie
    • , Jian Wu
    •  & Shusen Zheng

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Conflict of interest

The authors declare that they have no conflict of interest.

Corresponding authors

Correspondence to Jian Wu or Shusen Zheng.

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DOI

https://doi.org/10.1038/s41374-018-0027-6

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