SPOP-mediated ZMYND8 ubiquitination and phase separation exclusion drives mTOR inhibitor resistance in kidney cancer
What this study shows
Identifies a mechanism of mTOR-inhibitor (everolimus/temsirolimus) resistance in clear cell renal cell carcinoma: SPOP-driven K63-linked ubiquitination of ZMYND8 excludes it from phase-separation compartments, enabling a ZMYND8-ZHX2 complex that drives NEK7 transcription and alternative p70S6K activation independent of mTOR inhibition. A NEK7-targeting PROTAC restored everolimus sensitivity in ccRCC cells and mouse tumors, nominating NEK7 as a target to overcome mTOR-inhibitor resistance.
Abstract
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mTOR inhibitors including everolimus and temsirolimus have been approved by US FDA for treatment of clear cell renal cell carcinoma (ccRCC) in clinic. However, resistance to these drugs has been inevitable and the underlying mechanism remains poorly understood. Histone modifier ZMYND8 paradoxically acts as a transcription coactivator or corepressor.
Read the full abstract on PubMed →At a glance
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| Evidence type | A Animal model Marked A because it is an animal intervention or observation study measuring an organismal outcome (model: ccRCC cell lines (in vitro); mouse xenograft tumors treated with a NEK7-targeting PROTAC); the code names the system studied -- animal work can be rigorous and still not be human data. |
| Study type | 4 - Animal Study |
| Model system | ccRCC cell lines (in vitro); mouse xenograft tumors treated with a NEK7-targeting PROTAC |
| Journal | Nature Communications |
| Year | 2026 |
| Peer reviewed | Yes |
| Record last updated | 2026-10-01 |
| Source | DOI 10.1038/s41467-026-77043-9 · PMID 42778578 |
Where this study fits
How this study connects to the pathway map, open questions, people and other studies in the Atlas.
People in the Atlas
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Urology researcher at West China Hospital and first author of a study explaining how kidney cancers escape mTOR inhibitor drugs, and how blocking NEK7 restores their effect
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Senior/corresponding author of a 2026 Nature Communications study identifying the SPOP–ZMYND8–NEK7 mechanism of mTOR-inhibitor resistance in kidney cancer
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Topics
Extracted findings
These fields were extracted from the paper with AI assistance and have not been checked against the source. Read them as a pointer into the paper, not as curated claims; where they disagree with the curated summary above, the curated summary stands.
| Intervention | SPOP or NEK7 inhibition, including a NEK7-targeting PROTAC combined with everolimus |
| Target | SPOP-ZMYND8-ZHX2-NEK7 axis driving p70S6K activation |
| Model | Human ccRCC cell lines; mouse xenografts |
| Effect | SPOP-driven ZMYND8 ubiquitination induces NEK7, which activates p70S6K independently of mTOR and confers mTOR-inhibitor resistance; NEK7 degradation restored everolimus sensitivity. |
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