6533b7d4fe1ef96bd1263428
RESEARCH PRODUCT
Chemotherapy overcomes TRAIL-R4-mediated TRAIL resistance at the DISC level
Delphine MerinoEric SolaryGuillaume JacqueminPhilippe SaasNajoua LalaouiElisabetta IessiOlivier MicheauOlivier MicheauCarmen GarridoBruno ChauffertBruno ChauffertFlorence BouyerDavid LanneauVirginie GranciAlexandre Morizotsubject
MESH: CASP8 and FADD-Like Apoptosis Regulating ProteinMESH : Antineoplastic Combined Chemotherapy ProtocolsCASP8 and FADD-Like Apoptosis Regulating ProteinTRAILApoptosisMESH : Models BiologicalMitochondrionMESH : RNA Small InterferingMESH: Caspase 8TNF-Related Apoptosis-Inducing LigandMESH : TNF-Related Apoptosis-Inducing LigandMESH : Tumor Necrosis Factor Decoy Receptors0302 clinical medicineRNA interferenceNeoplasmsAntineoplastic Combined Chemotherapy ProtocolsMESH: RNA Small InterferingMESH: NeoplasmsRNA Small InterferingReceptorSensitizationCaspase 80303 health sciencesMESH : Caspase 8MESH: Drug Resistance Neoplasm3. Good healthCell biologyMESH: Antineoplastic Combined Chemotherapy ProtocolsMESH : Drug Resistance Neoplasmmedicine.anatomical_structure030220 oncology & carcinogenesisRNA InterferenceMESH : GPI-Linked ProteinsMESH: TNF-Related Apoptosis-Inducing LigandDeath Domain Receptor Signaling Adaptor ProteinsProgrammed cell deathMESH: Cell Line Tumorc-FLIPMESH: RNA InterferenceBiologyGPI-Linked ProteinsCaspase 8Models Biological03 medical and health sciencesCell Line TumorReceptors Tumor Necrosis Factor Member 10cmedicineTRAIL-R4HumanscancerChemotherapy[SDV.BBM]Life Sciences [q-bio]/Biochemistry Molecular BiologyMESH: Receptors TNF-Related Apoptosis-Inducing LigandMESH : Receptors TNF-Related Apoptosis-Inducing Ligand[ SDV.BBM ] Life Sciences [q-bio]/Biochemistry Molecular BiologyMolecular Biology030304 developmental biologyOriginal PaperMESH: HumansMESH : Cell Line TumorMESH: ApoptosisMESH : HumansMESH: Models BiologicalMESH : CASP8 and FADD-Like Apoptosis Regulating ProteinCell BiologyMESH: Tumor Necrosis Factor Decoy ReceptorsMESH : NeoplasmsReceptors TNF-Related Apoptosis-Inducing LigandTumor Necrosis Factor Decoy ReceptorsDrug Resistance NeoplasmApoptosisMESH : RNA InterferenceMESH: GPI-Linked ProteinsMESH : ApoptosisMESH : Death Domain Receptor Signaling Adaptor ProteinsMESH: Death Domain Receptor Signaling Adaptor ProteinsTumor Necrosis Factor Decoy Receptorsdescription
International audience; TNF-related apoptosis-inducing ligand or Apo2L (Apo2L/TRAIL) is a promising anti-cancer drug owing to its ability to trigger apoptosis by binding to TRAIL-R1 or TRAIL-R2, two membrane-bound receptors that are often expressed by tumor cells. TRAIL can also bind non-functional receptors such as TRAIL-R4, but controversies still exist regarding their potential to inhibit TRAIL-induced apoptosis. We show here that TRAIL-R4, expressed either endogenously or ectopically, inhibits TRAIL-induced apoptosis. Interestingly, the combination of chemotherapeutic drugs with TRAIL restores tumor cell sensitivity to apoptosis in TRAIL-R4-expressing cells. This sensitization, which mainly occurs at the death-inducing signaling complex (DISC) level, through enhanced caspase-8 recruitment and activation, is compromised by c-FLIP expression and is independent of the mitochondria. Importantly, TRAIL-R4 expression prevents TRAIL-induced tumor regression in nude mice, but tumor regression induced by TRAIL can be restored with chemotherapy. Our results clearly support a negative regulatory function for TRAIL-R4 in controlling TRAIL signaling, and unveil the ability of TRAIL-R4 to cooperate with c-FLIP to inhibit TRAIL-induced cell death.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-04-01 |