Avetux (rituximab biosimilar)

Table: 2237P Conclusions Independently of RAS mutation, existing adaptive immune response within metastases is associated with treatment benefit. ctDNA decrease is associated with tumor response.

Conclusions Despite good tolerability, AVETUXIRI trial did not reach its efficacy endpoint. IS could be a predictive biomarker for selecting patients with potential treatment benefits.

In summary, we report the final overall survival of the AVETUX trial and propose T cell clonality and diversity as a potential marker to predict response to chemo-immunotherapy combinations in MSS mCRC by performing a central radiological review. ClinicalTrials.gov, identifier (NCT03174405).

The patient received 4 cycles of FOLFIRI/cetuximab, followed by 4 cycles FOLFIRI/cetuximab + avelumab, followed by avelumab maintenance treatment for 10 weeks until end of treatment (EOT) due to progression in week 19...Together with the emergence of truncated PD-L1 variants, regulation of PD-L1 availabilty but not epitope disruption appears to be the key mechanistic principle towards PD-L1 escape. Future trials confirming this principle in other entities are warranted especially in patient subpopulations with rs396991.

The AVETUX regimen was feasible producing a high rate of responses in MSS pts mainly occurring within the first 8 weeks. The noted ORR/ETS of 79.5% warrants further evaluation in a randomized trial. Clinical trial information: NCT03174405.

The AVETUX regimen was feasible producing a high rate of responses in MSS pts mainly occurring within the first 8 weeks. The noted ORR/ETS of 79.5% warrants further evaluation in a randomized trial. Clinical trial information: NCT03174405.