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- W2904387613 abstract "Abstract Excessive and constitutive activation of nuclear factor-κB (NF-κB) leads to abnormal cell proliferation and differentiation, leading to the development of malignant tumors, including lymphoma. MicroRNA 146a (miR-146a) and miR-146b, both of which carry an identical seed sequence, have been shown to contribute to inflammatory diseases and tumors by suppressing the expression of key molecules required for NF-κB activation. However, the functional and physiological differences between miR-146a and miR-146b in disease onset have not been fully elucidated. In this study, we generated miR-146b–knockout (KO) and miR-146a–KO mice by genome editing and found that both strains developed hematopoietic malignancies such as B-cell lymphoma and acute myeloid leukemia during aging. However, the B-cell lymphomas observed in miR-146a– and miR-146b–KO mice were histologically different in their morphology, and the malignancy rate is lower in miR-146b mice than miR-146a mice. Upon mitogenic stimulation, the expression of miR-146a and miR-146b was increased, but miR-146b expression was lower than that of miR-146a. Using a previously developed screening system for microRNA targets, we observed that miR-146a and miR-146b could target the same mRNAs, including TRAF6, and inhibit subsequent NF-κB activity. Consistent with these findings, both miR-146a– and miR-146b–KO B cells showed a high proliferative capacity. Taken together, sustained NF-κB activation in miR-146b KO mice could lead to the development of hematopoietic malignancy with aging." @default.
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- W2904387613 date "2018-12-07" @default.
- W2904387613 modified "2023-10-02" @default.
- W2904387613 title "Ablation of miR-146b in mice causes hematopoietic malignancy" @default.
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- W2904387613 doi "https://doi.org/10.1182/bloodadvances.2018017954" @default.
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