CK1ε, PERIOD2, and cancer-selective growth arrest
Cancer cells depend more than normal cells on casein kinase 1-epsilon; inhibiting CK1ε causes PERIOD2-dependent growth arrest.
Source
Inhibition of casein kinase 1-epsilon induces cancer-cell-selective, PERIOD2-dependent growth arrest
Study at a glance
- Design
- Animal / in-vitro — Kinase shRNA library screen and CK1ε inhibitor assays in isogenic cancer vs normal cells
- N
- Library targets 1,006 genes; cell-line dependency study — no single sample N
- Population
- Isogenic cancer and normal cell models
- Outcome
- Cancer-selective, PERIOD2-dependent growth arrest after CSNK1E/CK1ε inhibition
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Inspect source passages
CK1ε, PERIOD2, and cancer-selective growth arrest
These passages occur verbatim in the stored paper text. They support the points listed below; they do not verify every statement in the explanation.
The shRNA library targets 1,006 human genes.
The library targets 1,006 human genes, including kinases, those similar to kinases and some ancillary proteins.
Which gene do cancer cells depend on more than normal cells here?
We found that CSNK1E is one such target gene upon which cancer cells depend more than normal cells.
What they did
Authors used shRNA and kinase-inhibitor perturbations across isogenic cancer vs normal cell models to find selective dependencies, focusing on CSNK1E/CK1ε and PERIOD2.
What they found
CSNK1E is a cancer-preferential dependency; CK1ε inhibitors phenocopy shRNA, and growth arrest is PERIOD2-dependent.
The limits
What it doesn't show
Not a patient clinical trial of CK1ε drugs; selectivity and potency still need medicinal chemistry.
Key terms
- CK1ε (CSNK1E)
- Casein kinase 1-epsilon, a circadian/clock-related kinase.
- PERIOD2 (PER2)
- Core circadian clock protein required for the growth-arrest phenotype here.
- shRNA screen
- Loss-of-function screen using short hairpin RNAs.
- Synthetic / selective dependency
- Gene more required in cancer than in normal cells.
- Kinase inhibitor
- Small molecule blocking kinase catalytic activity.
Flashcards
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Quiz yourself
Cancer-selective kinase dependency:
Common questions
Which kinase emerged as a cancer-selective target?
CK1ε / CSNK1E.
Do inhibitors match shRNA?
Yes—they give the same phenotype.
Which clock gene is required for arrest?
PERIOD2.
Is this a clinical approval study?
No—cell-based target discovery.
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