Innovent Announces Clinical Data of IBI363 (First-in-class PD-1/IL-2α-bias Bispecific Antibody Fusion Protein) Combined with Bevacizumab in Advanced Colorectal Cancer at the 2024 ESMO Congress
SAN FRANCISCO and
First-in-class PD-1/IL-2 α-bias bispecific antibody fusion protein IBI363 combined with bevacizumab in patients with advanced colorectal cancer: Results from Phase 1 study
This Phase 1 study was conducted to evaluate the safety, tolerability and preliminary efficacy of IBI363 combined with bevacizumab in subjects with advanced colorectal cancer.
A total of 35 subjects received treatment of IBI363 combined with bevacizumab, demonstrating promising anti-tumor efficacy with good tolerability and safety
- As of the data cutoff date (
Aug 30, 2024 ), a total of 35 subjects with advanced colorectal cancer received combination treatment at 3 different dose levels (0.6 mg/kg IBI363 combined with 5 mg/kg bevacizumab Q2W, 1 mg/kg IBI363 combined with 5 mg/kg bevacizumab Q2W, and 1.5 mg/kg IBI363 combined with 7.5 mg/kg bevacizumab Q3W). Among them, 91.4% of the subjects had advanced colorectal cancer with microsatellite stable (MSS) or proficient mismatch repair (pMMR), and the MSI/MMR status was unknown in 8.6% subjects. 91.4% of the subjects had previously received 2 or more lines of systemic anti-tumor treatment. 51.4% of the subjects had liver metastases. 25.7% of the subjects had received prior immunotherapy. 40% of the subjects had KRAS/NRAS exon 2/3/4 mutations. - The most common treatment related adverse events (TRAEs) were arthralgia, thyroid disorders, and rash. The total incidence of TRAEs ≥ grade 3 was 22.9%. Immune related adverse events (irAEs) ≥ grade 3 occurred in 5.7% of subjects. The safety profile of the combination regimen was similar to that of IBI363 monotherapy, and no new safety signals were identified.
Promising anti-tumor activity in subjects with MSS/pMMR colorectal cancer ; durable responses with a trend towards long-term benefit
- As of the cutoff date, 32 subjects were efficacy evaluable having underwent at least one post-baseline tumor assessment. The ORR was 21.9% (confirmed ORR was 15.6%), and DCR was 65.6%. The median DoR was 8.1 months (95% CI: 1.5~8.2). The median PFS follow-up time was 7.6 months (95% CI: 4.0~9.4), and the median PFS was 4.1 months (95% CI: 1.7~8.1). The median OS was not reached.
Promising efficacy signals in colorectal cancer with and without baseline liver metastases
- Among the 17 subjects with baseline liver metastases who underwent at least one post-baseline tumor assessment, ORR was 11.8% and DCR was 58.8%.
- Among the 15 subjects without baseline liver metastases who underwent at least one post-baseline tumor assessment,ORR was 33.3% and DCR was 73.3%.
Promising efficacy signals in both IO-treated and IO-naïve colorectal cancer
- Among the 8 subjects who had received prior immunotherapy and underwent at least one post-baseline tumor assessment, ORR was 25.0% and DCR was 62.5%.
- Among the 24 IO -naïve subjects who underwent at least one post-baseline tumor assessment, ORR was 20.8% and DCR was 66.7%.
Promising efficacy signals in colorectal cancer with and without KRAS/NRAS exon 2/3/4 mutations
- Among the 14 subjects with RAS exon 2/3/4 mutations and who had undergone at least one post-baseline tumor assessment, ORR was 21.4% and DCR was 57.1%.
- Among the 10 subjects without RAS exon 2/3/4 mutations who had undergone at least one post-baseline tumor assessment, ORR was 30.0% and DCR was 90.0%.
In addition, data from a Phase 1 clinical study of IBI363 monotherapy in a colorectal cancer cohort, presented at ASCO 2024, showed promising efficacy and good tolerability. Ongoing studies are now exploring IBI363 in other malignancies, including NSCLC, melanoma and other solid tumors, as well as in combination regimens for MSS/pMMR advanced colorectal cancer. Updates on relevant data and analysis will be shared at upcoming academic conferences and in journals.
Dr.
About IBI363 (First-in-class PD-1/IL-2α-bias bispecific antibody fusion protein)
IBI363 is a first-in-class PD-1/IL-2α-bias bispecific antibody fusion protein independently developed by
About Innovent
Innovent is a leading biopharmaceutical company founded in 2011 with the mission to empower patients worldwide with affordable, high-quality biopharmaceuticals. The company discovers, develops, manufactures and commercializes innovative medicines that target some of the most intractable diseases. Its pioneering therapies treat cancer, cardiovascular and metabolic, autoimmune and eye diseases. Innovent has launched 11 products in the market. It has 3 new drug applications under regulatory review, 4 assets in Phase III or pivotal clinical trials and 18 more molecules in early clinical stage. Innovent partners with over 30 global healthcare companies, including Eli Lilly, Sanofi, Incyte,
Guided by the motto, "Start with Integrity, Succeed through Action," Innovent maintains the highest standard of industry practices and works collaboratively to advance the biopharmaceutical industry so that first-rate pharmaceutical drugs can become widely accessible. For more information, visit www.innoventbio.com, or follow Innovent on Facebook and LinkedIn.
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References |
2. Baraibar I, Mirallas O, Saoudi N et al. Combined Treatment with Immunotherapy-Based Strategies for MSS Metastatic Colorectal Cancer. Cancers ( |
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