Daiichi Sankyo’s U3-1402 show reduction in tumor size in testing

Daiichi Sankyo’s test of HER3 antibody drug conjugate U3-1402 data suggest that targeting HER3 with may be an effective treatment strategy irrespective of mechanism of resistance identified in the setting of EGFR TKI resistance, where new precision treatments are needed, said Helena Yu, MD, Medical Oncologist, Memorial Sloan Kettering Cancer Center, and a trial investigator.

the presentation of updated phase 1 data for U3-1402 were shown in a Mini Oral Session at the IASLC 2019 World Conference on Lung Cancer (#WCLC19) in Barcelona, Spain Monday.

“As more patients are treated on study, the findings continue to demonstrate activity with U3-1402, including ongoing confirmed partial responses, in patients with EGFR-mutant metastatic non-small cell lung cancer that is no longer responding to EGFR TKI therapy,” said Helena Yu.

Dalila Sellami, Vice President at Daiichi Sankyo, said that HER3 is frequently overexpressed in non-small cell lung cancers as well as other types of solid tumors, but no HER3 targeting therapies are approved for NSCLC or any cancer. She said that U3-1402 is a potential first-in-class ADC designed to target and deliver treatment directly to HER3 expressing tumors, and based on these results, we will advance to dose expansion and broaden the scope of the trial to include patients with squamous or non-squamous NSCLC.

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