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TUC338 Promotes Diffuse Large B Cell Lymphoma Growth via Regulating EGFR/PI3K/AKT Signaling Pathway.

  • Yan Li‎ et al.
  • Journal of oncology‎
  • 2021‎

TUC338 is emerging as a novel vital long noncoding RNA (lncRNA) in human cancer; however, its role in diffuse large B cell lymphoma (DLBCL) remains unknown. In this study, we found that TUC338 was remarkably upregulated in DLBCL tissues as compared to matched normal tissues. High TUC338 was closely related to advanced Ann Arbor stage, resistance to CHOP-like treatment, and high IPI (International Prognostic Index). Stable knockdown of TUC338 evidently inhibited cell proliferation and chemotherapy resistance to Adriamycin and induced apoptosis. Further, we found that TUC338 was able to directly bind to miR-28-5p and increased EGFR level, resulting in activating carcinogenic PI3K/AKT signaling, thereby facilitating DLBCL uncontrolled growth. Moreover, we also found that depletion of TUC338 led to the inactivation of EGFR/PI3K/AKT pathway in vivo by using the xenograft tumor model. Preclinically, DLBCL patients with high TUC338 had shorter survival time than those with low TUC338, and serum TUC338 level was identified as an excellent indicator for DLBCL diagnosis. In sum, our findings clearly indicate that TUC338 functions as an oncogenic lncRNA in DLBCL through activating EGFR/PI3K/AKT pathway via sponging and inhibiting miR-28-5p, which may be a promising target for DLBCL treatment.


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