ZHX2 mediates proteasome inhibitor resistance via regulating nuclear translocation of NF-κB in multiple myeloma.

{"sci_version": "1.2", "schema": "https://corpus.bntrg.co.uk/sci/1.0/sci.schema.json", "id": "pmid:32780537", "kind": "science-record", "revision": 6, "content_hash": "sha256:64fce3d9fc476f9e8ce84e0eac20dccfb9caad0e6fbe359caa7a319f0b80e24e", "created_at": "2026-11-01T15:41:07Z", "updated_at": "2026-11-01T21:23:36Z", "generator": {"name": "corpus-assay-engine", "run_id": "reading-sci-2026-11-01"}, "paper": {"state": "complete", "title": "ZHX2 mediates proteasome inhibitor resistance via regulating nuclear translocation of NF-κB in multiple myeloma.", "doi": "10.1002/cam4.3347", "pmid": "32780537", "authors": ["Jifeng Jiang", "Yifeng Sun", "Jiadai Xu", "Tianhong Xu", "Zhao Xu", "Peng Liu"], "journal": "Cancer medicine", "year": 2020, "abstract": "BACKGROUND: Multiple myeloma (MM) is an incurable hematological malignancy. Although proteasome inhibitors and immunomodulators have significantly improved patient outcomes, some patients respond poorly to treatment and almost all patients will relapse. Mechanisms of proteasome inhibitor resistance in multiple myeloma have not been fully elucidated. ZHX2 is a transcription regulator degraded via proteasome and presents both oncogenic or tumor suppressive effect in different cancers, however, it is still unknown that the role of ZHX2 in myeloma. In this study, we aim to demonstrate the effect and mechanism of ZHX2 on proteasome inhibitor resistance in MM.\nMETHODS: GSE24080 gene expression profile datasets from Gene Expression Omnibus (GEO) were analyzed to evaluate the relationship between ZHX2 expression level and survival in MM. Expression of ZHX2 in human MM cell lines at baseline and after bortezomib (BTZ) treatment was determined by Western blotting (WB). The proliferation and apoptosis rate of MM cells treated with BTZ after the knockdown of ZHX2 were analyzed by flow cytometry. Nuclear translocation of NF-κB after the knockdown of ZHX2 was evaluated by WB and immunofluorescence, and the expression of NF-κB target genes was measured by real-time quantitative PCR. Co-immunoprecipitation (Co-IP) and WB were used to detect the interaction of ZHX2 with NF-κB.\nRESULTS: We found that higher ZHX2 expression was correlated with poorer clinical outcomes of patients. In addition, ZHX2 expression was relatively higher in RPMI-8226 and MM.1S cell lines and the level of ZHX2 protein was upregulated after BTZ treatment. Knockdown of ZHX2 significantly enhanced the sensitivity of MM cells to BTZ, inhibited nuclear translocation of NF-κB, and reduced mRNA expression of NF-κB target genes. It was also revealed that ZHX2 directly binds to NF-κB.\nCONCLUSION: Our study showed that ZHX2 can promote proteasome inhibitor resistance in MM cells by regulating the nuclear translocation of NF-κB.", "claims": [{"id": "claim-method", "statement": "Survival analysis was evaluated using Kaplan–Meier plots and Log‐Rank test.", "kind": "methodological", "target": null, "evidence": [{"asset": "source:pmid:32780537", "locator": "sections[9] \"Statistical analysis\" paragraph 2", "quote": "Survival analysis was evaluated using Kaplan–Meier plots and Log‐Rank test."}], "state": "complete"}, {"id": "claim-data-access", "statement": "The data and materials used are available when requested.", "kind": "methodological", "target": null, "evidence": [{"asset": "source:pmid:32780537", "locator": "sections[24] \"DATA AVAILABILITY STATEMENT\" paragraph 2", "quote": "The data and materials used are available when requested."}], "state": "complete"}], "gaps": []}, "experiment": {"state": "complete", "objective": null, "steps": [{"id": "read_published_estimate", "order": 1, "name": "Read the published estimate from the source", "kind": "other", "state": "complete", "blocked_on": null, "description": "The claim, method and evidence span published with the source article.", "duration_hours": null, "parameters": {}, "inputs": ["source:pmid:32780537"], "outputs": ["the published estimate and its evidence"], "instruments": [], "reagents": []}, {"id": "obtain_source_data", "order": 2, "name": "Obtain the source data from the named repository", "kind": "data-preparation", "state": "complete", "blocked_on": null, "description": "The GEO series accession resolves and its sample accessions are listed. 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