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Identification of AK4 and RHOC as novel oncogenes addicted by adult T-cell leukemia

ABSTRACT: Adult T-cell leukemia (ATL) is a highly aggressive T-cell malignancy characterized by human T-cell leukemia virus type 1 (HTLV-1) infection. ATL has a very poor prognosis and lacks satisfactory treatments; therefore, it is critical to identify novel targets in ATL cells in order to develop effective targeted therapeutics. Here we report the identification of two novel oncogenes, AK4 and RHOC, as target genes of miR-455-3p, a tumor suppressive microRNA in ATL patients. Importantly, AK4 and RHOC are highly expressed in ATL and exhibit oncogenic potentials in vitro and in vivo. Interestingly, transcriptome and metabolome analyses reveal a functional overlap of AK4 and RHOC, including activating oncogenic pathways such as Myc targets and deregulating lipid metabolism such as enhancing the production of sphingomyelin, a tumor-promoting lipid. In particular, compared to other types of T-cell malignancy such as T-ALL and CTCL, ATL is sensitive to sphingomyelin inhibition and AK4 or RHOC depletion. Altogether, we report a distinct dependency of ATL on newly characterized oncogenes AK4 and RHOC and an oncometabolite sphingomyelin, which together represent novel targetable vulnerabilities of ATL that could be exploited for developing effective therapeutics.

INSTRUMENT(S): Liquid Chromatography MS - negative - reverse phase, Liquid Chromatography MS - positive - reverse phase

PROVIDER: MTBLS11858 | MetaboLights | 2025-02-03

REPOSITORIES: MetaboLights

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Identification of AK4 and RHOC as novel oncogenes addicted by adult T-cell leukemia

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