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Andamertinib in Advanced NSCLC With EGFR Exon 20 Insertions After Platinum-Based Chemotherapy or Immunotherapy:
Jin-Ji Yang1, Yu Mu2, Zhe-Hai Wang3
1Guangdong Lung Cancer Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, People's Republic of China.
Objectives:
This study aimed to evaluate andamertinib, a selective and irreversible tyrosine kinase inhibitor, in pretreated advanced EGFR exon 20 insertion (ex20ins)-mutant NSCLC.
Methods:
In the phase 2, multicenter, single-arm KANNON study (NCT06015503), patients with locally advanced or metastatic NSCLC harboring EGFR ex20ins mutations who had progressed after platinum-based chemotherapy or immunotherapy received oral andamertinib 240 mg once daily in 28-day cycles. The primary end point was the confirmed objective response rate (ORR) assessed by independent review.
Results:
A total of 92 patients were enrolled and received daily 240 mg andamertinib, with nearly 30 different exon20ins subtypes included. The confirmed ORR was 42.7% (95% confidence interval [CI], 32.4-53.0), with a disease control rate of 86.5% and a median duration of response of 8.7 months (95% CI, 5.65-11.96). As of September 6, 2025, with a median follow-up of 15.4 (range, 0.4-20.5) months, the median progression-free survival was 6.2 months (95% CI, 4.63-7.85) and median overall survival was not reached (95% CI, 13.93 mo to not estimable), with a 12-month survival rate of 70.5%. Among 38 patients with brain metastasis, the systemic confirmed ORR was 47.4% (95% CI, 31.5-63.2). Grade more than or equal to 3 treatment-related adverse events occurred in 40.2% of patients, and the most frequent events were diarrhea (12.0%) and rash (7.6%). No interstitial lung disease or grade more than or equal to 3 QT prolongation was reported.
Conclusions:
Andamertinib at 240 mg once daily demonstrated efficacy with a manageable safety profile in previously treated patients with EGFR ex20ins-mutant NSCLC.
Insights
Andamertinib shows promise for patients with advanced EGFR exon 20 insertion-mutant non-small cell lung cancer (NSCLC). This study found a 42.7% objective response rate and manageable side effects in pretreated individuals.
Area of Science:
- Oncology
- Pharmacology
- Genetics
Background:
- Non-small cell lung cancer (NSCLC) with EGFR exon 20 insertion (ex20ins) mutations presents a therapeutic challenge.
- Limited treatment options exist for patients with pretreated, advanced EGFR ex20ins-mutant NSCLC.
Purpose of the Study:
- To evaluate the efficacy and safety of andamertinib, a selective and irreversible tyrosine kinase inhibitor.
- To assess andamertinib in patients with pretreated advanced EGFR ex20ins-mutant NSCLC.
Main Methods:
- A Phase 2, multicenter, single-arm clinical trial (KANNON study) was conducted.
- Patients received oral andamertinib 240 mg once daily.
- The primary endpoint was confirmed objective response rate (ORR) by independent review.
Main Results:
- The confirmed ORR was 42.7% (95% CI, 32.4-53.0) in 92 patients with diverse ex20ins subtypes.
- Median progression-free survival was 6.2 months, and 12-month overall survival rate was 70.5%.
- Common grade ≥3 adverse events included diarrhea (12.0%) and rash (7.6%); no interstitial lung disease was reported.
Conclusions:
- Andamertinib demonstrated significant efficacy in pretreated patients with EGFR ex20ins-mutant NSCLC.
- The drug exhibited a manageable safety profile, with notable adverse events being diarrhea and rash.
- These findings support andamertinib as a potential treatment option for this patient population.
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