iScience (Jun 2024)

LncRNA IRAIN overcomes imatinib resistance in chronic myeloid leukemia via NF-κB/CD44 pathway inhibition

  • Xijia Wang,
  • Yutong Hou,
  • Yizhu Lyu,
  • Jiayin Zhou,
  • Xin Zhang,
  • Mohammad Arian Hassani,
  • Dan Huang,
  • Zhijia Zhao,
  • Dong Zhou,
  • Fang Xie,
  • Xuehong Zhang,
  • Jinsong Yan

Journal volume & issue
Vol. 27, no. 6
p. 109851

Abstract

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Summary: The development of tyrosine kinase inhibitors (TKIs) has revolutionarily increased the overall survival of patients with chronic myeloid leukemia (CML). However, drug resistance remains a major obstacle. Here, we demonstrated that a BCR-ABL1-independent long non-coding RNA, IRAIN, is constitutively expressed at low levels in CML, resulting in imatinib resistance. IRAIN knockdown decreased the sensitivity of CD34+ CML blasts and cell lines to imatinib, whereas IRAIN overexpression significantly increased sensitivity. Mechanistically, IRAIN downregulates CD44, a membrane receptor favorably affecting TKI resistance, by binding to the nuclear factor kappa B subunit p65 to reduce the expression of p65 and phosphorylated p65. Therefore, the demethylating drug decitabine, which upregulates IRAIN, combined with imatinib, formed a dual therapy strategy which can be applied to CML with resistance to TKIs.

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