- RYBREVANT (amivantamab-vmjw) is a low fucose, fully human IgG1-based bispecific antibody with immune cell-directing activity that targets EGFR mutations and MET mutations and amplifications in NSCLC.1
- Amivantamab for SC administration is a coformulation of amivantamab with rHuPH20.2
- LAZCLUZE (lazertinib) is a third-generation EGFR tyrosine kinase inhibitor.3
PALOMA-2 study
- PALOMA-2 (NCT05498428) is an ongoing, phase 2, open-label, international, parallel-cohort study evaluating the efficacy and safety of a SC formulation of amivantamab with chemotherapy and/or lazertinib in patients with EGFR-mutated advanced NSCLC (N=520). The primary endpoint is investigator-assessed ORR.4,5
Cohorts 1 and 6
-
Interim efficacy, safety, and PK results were reported for amivantamab SC plus lazertinib
with either recommended (cohort 1, n=68) or mandatory (cohort 6, n=58) prophylactic
anticoagulation in treatment-naïve patients with EGFR-mutated (Exon19del or Exon 21
L858R) advanced NSCLC.4
- At a median follow-up of 8.6 months, the investigator-assessed ORR was 75% (95% CI, 63-85) in cohort 1 and 80% (95% CI, 65-90) in cohort 6.
- The most common TEAEs (≥20%) were associated with EGFR and MET inhibition and were primarily grade 1-2 in severity.
- The ARR (MedDRA preferred term) rate was 15% in all patients.
- The VTE rate was 18% in cohort 1 and 7% in cohort 6.
- TRAEs leading to discontinuation of all agents were reported in 9% of patients.
- Mean (%CV) amivantamab coformulation Ctrough on C2D1 were 328 (32) µg/mL in cohort 1 and 373 (27) µg/mL in cohort 6.
Cohort 4
-
Initial safety and PK results were reported for patients switching from RYBREVANT IV to
amivantamab SC (cohort 4). Patients in cohort 4 previously received RYBREVANT IV for ≥8
weeks without dose reduction or evidence of PD, as part of standard of care, an expanded
access program, or rollover from a long-term extension study.6
- At a median follow-up of 9.7 months, the safety profile of amivantamab SC after switching from RYBREVANT IV was consistent with previous reports of amivantamab SC monotherapy, with no new safety signals; no ARRs were reported.
- The most common AEs associated with EGFR and MET inhibition were paronychia (44%) and hypoalbuminemia (40%), respectively.
- The simulated PK exposures of amivantamab IV were noninferior to amivantamab SC for the Q2W dose regimen, meeting the predefined noninferiority criteria for efficacy (lower bound of the GMR 90% CI ≥0.8 for Cavg and Ctrough) and safety (upper bound of the GMR 90% CI ≤1.25 for Cmax).
- Most patients receiving amivantamab SC by C1 were satisfied (79%), found it convenient (83%), and preferred it (63%) over RYBREVANT IV.
Note: AE, adverse event; ARR, administration-related reaction; C, cycle; Cavg, average concentration; Cmax, maximum concentration; CI, confidence interval; Ctrough, trough concentration; CV, coefficient of variation; D, day; EGFR, epidermal growth factor receptor; Exon19del, Exon 19 deletion; GMR, geometric mean ratio; IgG1, immunoglobulin G1; IV, intravenous; MedDRA, Medical Dictionary for Regulatory Activities; MET, mesenchymal-epithelial transition; NSCLC, non-small cell lung cancer; ORR, objective response rate; PD, progressive disease; PK, pharmacokinetics; Q2W, every 2 weeks; rHuPH20, recombinant human hyaluronidase PH20; SC, subcutaneous; TEAE, treatment-emergent adverse event; TRAE, treatment-related adverse event; VTE, venous thromboembolism.
Overview4,5
PALOMA-2 (NCT05498428) is an ongoing, phase 2, open-label, international, parallel-cohort study designed to assess the efficacy and safety of amivantamab SC with chemotherapy and/or lazertinib in patients with EGFR-mutated advanced NSCLC.
Key inclusion criteria4-6
- Adults (age ≥18 years) with locally advanced or metastatic NSCLC
- ≥1 measurable lesion per RECIST v1.1 (all cohorts except cohort 4)
- ECOG PS 0 or 1
- Brain metastases if present must be stable
- Adequate organ functions
Study design4-6
Efficacy results4
Cohorts 1 (n=68) and 6 (n=45)
INV- and ICR-assessed ORR (confirmed and unconfirmed responses)
Endpoint |
Cohort 1
(n=68) |
Cohort 6
(n=45) |
Overall
(N=113) |
|||
---|---|---|---|---|---|---|
INV | ICR | INV | ICR | INV | ICR | |
ORR, % (95% CI) | 75 (63- 85) | 81 (70 -89) | 80 (65 -90) | 76 (61 -87) | 77 (68 -84) | 79 (70 -86) |
Median follow-up was 10 months for cohort 1, 6.1 months for cohort 6, and 8.6 months overall. |
Safety results4,6
Cohorts 1 (n=68) and 6 (n=57)4
- The most common TEAEs (≥20%) were associated with EGFR and MET inhibition and were primarily grade 1-2 in severity.
- ARRs were reported in 15% (19/125) of patients, with 90% of ARRs reported in C1 (on or after C1D1 but before the next dose).
- Median time to ARR onset (defined as the start of ARR minus the start of the last injection prior to this event) was 2.3 hours (range, 0.3-7.2).
- TRAEs leading to the discontinuation of all agents were reported in 9% (11/125) of patients.
Cohort 4 (n=25)6
- The most common AEs associated with EGFR and MET inhibition were paronychia (44%) and hypoalbuminemia (40%), respectively.
- TRAE (interstitial lung disease) leading to discontinuation of amivantamab SC was reported in 1 patient.
- No ARRs were reported.
PK4,6
Cohorts 1 (n=50) and 6 (n=42)4
- Consistent with historic IV levels (mean [%CV], 317 [32] µg/mL from the MARIPOSA study), mean (%CV) amivantamab coformulation Ctrough concentrations on C2D1 were as follows:
- Cohort 1 (n=50): 328 (32) µg/mL
- Cohort 6 (n=42): 373 (27) µg/mL
Cohort 46
- The PK exposures of amivantamab IV were noninferior to amivantamab SC for the Q2W dose regimen, meeting the predefined noninferiority criteria for efficacy (lower bound of the GMR 90% CI ≥0.8 for Cavg and Ctrough) and safety (upper bound of the GMR 90% CI ≤1.25 for Cmax).
Note: AE, adverse event; ARR, administration-related reaction; C, cycle; Cavg, average concentration; Cmax, maximum concentration; CI, confidence interval; Ctrough, trough concentration; CV, coefficient of variation; D, day; ECOG PS, Eastern Cooperative Oncology Group performance status; EGFR, epidermal growth factor receptor; Exon19del, Exon 19 deletion; Exon20ins, Exon 20 insertion; GMR, geometric mean ratio; ICR, independent central review; INV, investigator; IV, intravenous; MET, mesenchymal-epithelial transition; NSCLC, non-small cell lung cancer; ORR, objective response rate; PK, pharmacokinetics; PO, orally; Q2W, every 2 weeks; Q3W, every 3 weeks; Q4W, every 4 weeks; QD, once daily; RECIST v1.1, Response Evaluation Criteria in Solid Tumors version 1.1; SC, subcutaneous; SC-CF, subcutaneous coformulation with recombinant human hyaluronidase PH20; TEAE, treatment-emergent adverse event; TRAE, treatment-related adverse event; US, United States.
- PALOMA-2 (NCT05498428) is an ongoing, phase 2, open-label, international, parallel-cohort study designed to assess the efficacy and safety of amivantamab SC with chemotherapy and/or lazertinib in patients with EGFR-mutated advanced NSCLC.4,5
- Amivantamab SC, coformulated with rHuPH20, is administered by manual injection in the abdomen at 1600 mg (or 2240 mg if BW ≥80 kg) on D1 and D15 of each 28-day cycle.4-6
PALOMA-2 study design4-6
PALOMA-2 (ClinicalTrials.gov Identifier: NCT05498428); data cutoff date: January 6, 2024.
aReceived first-line regimen.
bb1600 mg (2240 mg if BW ≥80 kg) QW for the first 4 weeks, then Q2W for
cohorts 1, 4, and 6; 28-day cycle.
c1600 mg (2240 mg if BW ≥80 kg) on C1D1, then
2400 mg (3360 mg if BW ≥80 kg); 21-day cycle.
dExperienced disease progression on or after osimertinib treatment.
ePatients previously received amivantamab IV 1050 mg (1400 mg if BW ≥80 kg) for ≥8 weeks without dose
reduction or evidence of PD, as part of standard of care, an expanded access program, or
rollover from a long-term extension study.
f3520 mg (4640 mg if BW ≥80 kg); 28-day cycle.
gExperienced disease progression on or after amivantamab plus lazertinib.
hFor cohort 4, results were based on the resimulation of the PALOMA-3 study using the final population PK model, in which patients received amivantamab IV or SC at DL0, DL(-1), and DL(-2); PK samples were not collected in PALOMA-2 cohort 4.
iTreatment satisfaction was assessed using the mTASQ, a 12-item questionnaire measuring the impact of treatment mode (SC administration) on physical functioning; psychological functioning; and activities of daily living, convenience, and satisfaction. Assessment was performed at screening (before amivantamab IV to SC switch) and after amivantamab SC administration at C1D1, C3D1, and EOT. The modified questionnaire specifies that the injection will take place in the “skin.”
- Interim efficacy, safety, and PK results were reported for amivantamab SC plus lazertinib with either recommended (cohort 1) or mandatory (cohort 6) prophylactic anticoagulation in treatment-naïve patients with EGFR-mutated (Exon19del or Exon 21 L858R) advanced NSCLC.4
Demographics and baseline disease characteristics4
Characteristic | Characteristic |
Cohort 1
(n=68) |
Cohort 6
(n=58) |
Total
(n=126) |
---|---|---|---|---|
Median age, years (range) | 58 (28-85) | 62 (34-83) | 59 (28-85) | |
Female, n (%) | 42 (62) | 34 (59) | 76 (60) | |
Race, n (%) | ||||
Asian | 45 (66) | 40 (69) | 85 (67) | |
White | 19 (28) | 16 (28) | 35 (28) | |
Othera | 4 (6) | 2 (3) | 6 (5) | |
ECOG PS 1, n (%) | 48 (71) | 43 (75) | 91 (72) | |
History of smoking, n (%) | 15 (22) | 18 (31) | 33 (26) | |
History of brain metastases, n (%) | 20 (29) | 18 (31) | 38 (30) | |
EGFR mutation,b n (%) | ||||
Exon19del | 45 (66) | 34 (59) | 79 (63) | |
Exon 21 L858R | 24 (35) | 24 (41) | 48 (38) | |
Adenocarcinoma subtype, n (%) | 65 (96) | 57 (98) | 122 (97) | |
aIncludes Black or African American and American Indian/Alaska
Native.
|
Primary endpoint4
-
At a median follow-up of 8.6 months, the investigator-assessed ORR with amivantamab SC
plus
lazertinib was 77% (95% CI, 68-84) for both cohorts 1 and 6.
- In cohort 1 (median follow-up, 10 months; n=68) and cohort 6 (median follow-up, 6.1 months; n=45), the investigator-assessed ORR was 75% (95% CI, 63-85) and 80% (95% CI, 65-90), respectively.
Secondary endpoints4
-
The ICR-assessed ORR reported with amivantamab SC plus lazertinib was comparable with
previous reports of RYBREVANT IV plus lazertinib.
- The overall ICR-assessed ORR was 79% (95% CI, 70-86; cohort 1, 81% [95% CI, 70-89]; cohort 6, 76% [95% CI, 61-87]).
- The investigator-assessed best response, TTR, and DOR in confirmed responders were evaluated across cohorts 1 and 6.
Investigator-assessed best response, TTR, and DOR4
Parameters |
Confirmed responders
(n=111) |
---|---|
Best response,a n | |
CR | 0 |
PR | 75 |
SD | 33 |
PD | 2 |
Median TTR, months (range) | 1.9 (1.4-5.3) |
Median DOR,a,b months | NE |
aPatients without postbaseline tumor assessment were excluded. |
- AEs reported with amivantamab SC plus lazertinib were consistent with previous reports of RYBREVANT IV plus lazertinib. The most common TEAEs (≥20%) were associated with EGFR and MET inhibition and were primarily grade 1-2 in severity.4
-
ARRs were reported in 15% (19/125) of patients.4
- ARRs (90%; 18/20) were mostly reported in C1 (on or after C1D1 but before the next dose).
- One patient reported 2 ARRs (1 on C1D1 and 1 on C1D9).
- Median time to ARR onset (defined as the start of ARR minus the start of the last injection prior to this event) was 2.3 hours (range, 0.3-7.2).
- TRAEs leading to the discontinuation of all agents were reported in 9% (11/125) of patients.4
- In the safety-evaluable set, 48 (71%) patients in cohort 1 and 57 (100%) patients in cohort 6 received prophylactic anticoagulation (apixaban, rivaroxaban, dalteparin, or enoxaparin as included in the national treatment guidelines; please refer to individual product labels for complete Prescribing Information).4
-
VTE was reported in 13% (16/125) of all patients, with 18% (12/68) in cohort 1 and
7% (4/57) in cohort 6.4
- Most VTEs were grade 1-2 in severity; no grade 5 events were reported.
- No VTEs led to dose reductions.
- Of the 12 patients in the prophylactic anticoagulation group who reported VTE, 11 (92%) developed VTE after discontinuing prophylactic anticoagulation.4
- Median onset time of VTE after discontinuing prophylactic anticoagulation was 70 days (range, 2-185).
VTE and bleeding events based on prophylactic anticoagulation use4
n (%) |
Any prophylactic
anticoagulation (n=105) |
No prophylactic
anticoagulation (n=20) |
Total
(n=125) |
---|---|---|---|
Any VTEa | 12 (11) | 4 (20) | 16 (13) |
Grade ≥3 | 0 | 1 (5) | 1 (1) |
Grade 5 | 0 | 0 | 0 |
Any VTE leading to death | 0 | 0 | 0 |
Any VTE leading to any discontinuation | 0 | 0 | 0 |
Grade ≥3 bleedingb | 2 (2)c | 0 | 2 (2) |
aVTE AEs were identified using the SMQ for “Embolic and
Thrombotic events, Venous (SMQ),” and
the preferred term was “Thrombosis” or “Embolism.” |
-
Consistent with historic IV levels (mean [%CV], 317 [32] µg/mL from the MARIPOSA study),
mean
(% CV) amivantamab coformulation Ctrough on C2D1 were as
follows4:
- Cohort 1 (n=50): 328 (32) µg/mL
- Cohort 6 (n=42): 373 (27) µg/mL
- Initial safety and PK results were reported for patients switching from RYBREVANT IV to amivantamab SC (cohort 4).6
- Of the 26 patients enrolled in cohort 4, 25 were switched from RYBREVANT IV to amivantamab SC.6
- At the data cutoff date of October 24, 2024,6
- Median follow-up from the first amivantamab SC dose was 9.7 months.
- Median treatment duration was 3.1 months for prior RYBREVANT IV and 7.4 months for amivantamab SC.
- In total, 64% of patients continued to receive amivantamab SC.
Demographics and baseline disease characteristics6
Characteristic | Cohort 4 (n=26) |
||
---|---|---|---|
Median age, years (range) | 66 (41-83) | ||
Female, n (%) | 15 (58) | ||
Race, n (%) | |||
Asian | 14 (54) | ||
White | 10 (38) | ||
Not reporteda | 2 (8) | ||
ECOG PS, n (%); n=25 | |||
0 | 9 (36) | ||
1 | 16 (64) | ||
History of smoking, n (%) | 10 (38) | ||
History of brain metastases, n (%) | 8 (31) | ||
EGFR mutation,b n (%); n=23 | |||
Exon 21 L858R | 3 (13) | ||
Exon20ins | 21 (91) | ||
Adenocarcinoma histology, n (%) | 24 (92) | ||
aPatient either declined to answer the question or was not able to identify a race. |
- The safety profile of amivantamab SC after switching from RYBREVANT IV was consistent with previous reports of amivantamab SC monotherapy, with no new safety signals reported.6
- The most common AEs associated with EGFR and MET inhibition were paronychia (44%) and hypoalbuminemia (40%), respectively.6
- The incidence of rash (grouped term, including rash, rash maculo-papular, acne, dermatitis acneiform, rash pustular, and skin lesions) was 40% (n=10), with grade ≥3 events reported in 12% of patients (n=3).6
- TRAE (interstitial lung disease) leading to discontinuation of amivantamab SC was reported in 1 patient.6
- No ARRs (defined per the MedDRA preferred term and referred to as infusion-related reactions in prior IV studies) were reported.6
- Patient-reported treatment satisfaction was evaluated for RYBREVANT IV at screening vs amivantamab SC at C1.6
Patient-reported treatment satisfaction6
Patient responses to mTASQ, % | RYBREVANT IV at screening (n=25) |
Amivantamab SC at C1D1 (n=24) |
---|---|---|
Convenience over timea,b | ||
Inconvenient or very inconvenient | 24 | 0 |
Neither convenient nor inconvenient | 32 | 17 |
Convenient or very convenient | 44 | 83 |
Feeling restricted over timea,c | ||
Quite a bit | 4 | 0 |
A little bit or somewhat | 72 | 46 |
Not at all | 24 | 54 |
Bothered by the time it takes for infusion/injectiona,d | ||
Quite bothered | 28 | 0 |
A little or moderately bothered | 60 | 33 |
Not at all bothered | 12 | 67 |
aThe mTASQ for IV injection was completed at screening. |
PROs by C16
- In total, 96% of patients were compliant with the mTASQ assessments.
- Most patients receiving amivantamab SC were satisfied (79%), found it convenient (83%), and preferred it (63%) over RYBREVANT IV.
- In total, 54% and 67% of patients receiving amivantamab SC (n=24) vs 24% and 12% receiving RYBREVANT IV (n=25), respectively, reported feeling unrestricted and unbothered by the time required for treatment administration.
- Most patients experienced mild or no injection-site symptoms with amivantamab SC:
- Mild or no pain: 71%
- Mild or no swelling: 83%
- Mild or no redness: 88%
- Among patients receiving amivantamab SC, severe injection-site pain was reported in 8% at C1, with none reported at C3.
- Population PK simulations were conducted for amivantamab IV vs SC exposures for the Q2W dose regimen at DL0, DL(-1), and DL(-2).6
- The simulated PK exposures of amivantamab IV were noninferior to amivantamab SC for the Q2W dose regimen, meeting the predefined noninferiority criteria for efficacy (lower bound of the GMR 90% CI ≥0.8 for Cavg and Ctrough) and safety (upper bound of the GMR 90% CI ≤1.25 for Cmax).6
PK simulations for the Q2W regimen6,a
PK endpoint | Amivantamab IV (GM [CV%]) | Amivantamab SC (GM [CV%]) | SC/IV GMR (90% CI) | ||||||
---|---|---|---|---|---|---|---|---|---|
DL0 | DL(-1) | DL(-2) | DL0 | DL(-1) | DL(-2) | DL0 | DL(-1) | DL(-2) | |
Cavg,C2 | 362 (25) | 229 (26) | 98 (31) | 396 (28) | 245 (29) | 148 (30) | 1.09 (1.05-1.14) |
1.07 (1.03-1.12) |
1.52 (1.44-1.59) |
Cavg,ss | 245 (27) | 148 (27) | 57 (32) | 275 (32) | 160 (33) | 89 (33) | 1.12 (1.07-1.18) |
1.08 (1.03-1.14) |
1.56 (1.48-1.64) |
Ctrough,max | 305 (27) | 191 (27) | 80 (33) | 367 (28) | 227 (28) | 138 (29) | 1.2 (1.15-1.26) |
1.19 (1.14-1.24) |
1.72 (1.64-1.81) |
Ctrough,ss | 139 (40) | 76 (41) | 22 (50) | 198 (38) | 109 (40) | 55 (42) | 1.42 (1.34-1.51) |
1.43 (1.34-1.53) |
2.55 (2.38-2.74) |
Cmax,max | 696 (21) | 457 (21) | 218 (26) | 486 (28) | 306 (29) | 189 (30) | 0.7 (0.67-0.73) |
0.67 (0.64-0.7) |
0.87 (0.83-0.91) |
Cmax,ss | 534 (20) | 344 (21) | 160 (25) | 343 (31) | 205 (32) | 118 (32) | 0.64 (0.62-0.67) |
0.6 (0.57-0.62) |
0.74 (0.71-0.77) |
aIV: DL0, 1050 mg (≥80 kg, 1400 mg); DL(-1), 700 mg (≥80 kg, 1050 mg); DL(-2), 350 mg (≥80 kg, 700 mg); |
AE | Adverse event | GM | Geometric mean |
---|---|---|---|
ALT | Alanine aminotransferase | GMR | Geometric mean ratio |
ARR | Administration-related reaction | ICR | Independent central review |
AST | Aspartate aminotransferase | IgG1 | Immunoglobulin G1 |
BW | Body weight | INV | Investigator |
C | Cycle | IV | Intravenous |
Cavg | Average concentration | max | Maximum |
CBR | Clinical benefit rate | MedDRA | Medical Dictionary for Regulatory Activities |
CI | Confidence interval | MET | Mesenchymal-epithelial transition |
Cmax | Maximum concentration | mTASQ | Modified Therapy Administration Satisfaction Questionnaire |
CR | Complete response | NE | Not estimable |
Ctrough | Trough concentration | NSCLC | Non-small cell lung cancer |
CV | Coefficient of variation | ORR | Objective response rate |
D | Day | OS | Overall survival |
DL | Dose level | PD | Progressive disease |
DOR | Duration of response | PFS | Progression-free survival |
ECOG PS | Eastern Cooperative Oncology Group performance status | PK | Pharmacokinetics |
EGFR | Epidermal growth factor receptor | PO | Orally |
EOT | End of treatment | PR | Partial response |
Exon19del | Exon 19 deletion | PRO | Patient-reported outcome |
Exon20ins | Exon 20 insertion | Q2W | Every 2 weeks |
Q3W | Every 3 weeks | SD | Stable disease |
---|---|---|---|
Q4W | Every 4 weeks | SMQ | Standardized MedDRA query |
QD | Once daily | ss | Steady state |
QW | Once a week | TEAE | Treatment-emergent adverse event |
RECIST v1.1 | Response Evaluation Criteria in Solid Tumors version 1.1 |
TRAE | Treatment-related adverse event |
rHuPH20 | Recombinant human hyaluronidase PH20 | TTR | Time to response |
SC | Subcutaneous | US | United States |
SC-CF | Subcutaneous coformulation with recombinant human hyaluronidase PH20 |
VTE | Venous thromboembolism |
A literature search of MEDLINE®, Embase®, BIOSIS Previews®, and Derwent Drug File (and/or other resources, including internal/external databases) was conducted on 26 March 2025.
- Moores SL, Chiu ML, Bushey BS, et al. A novel bispecific antibody targeting EGFR and cMet is effective against EGFR inhibitor-resistant lung tumors. Cancer Res. 2016;76(13):3942-3953.
- Leighl NB, Akamatsu H, Lim SM, et al. Subcutaneous versus intravenous amivantamab, both in combination with lazertinib, in refractory epidermal growth factor receptor-mutated non-small cell lung cancer: primary results from the phase III PALOMA-3 study. J Clin Oncol. 2024;42(30):3593-3605.
- Cho BC, Felip E, Hayashi H, et al. MARIPOSA: phase 3 study of first-line amivantamab + lazertinib versus osimertinib in EGFR-mutant non-small cell lung cancer. Future Oncol. 2022;18(6):639-647.
- Lim SM, Tan JL, Dias JM, et al. Subcutaneous amivantamab and lazertinib as first-line treatment in patients with EGFR mutated advanced non-small cell lung cancer (NSCLC): interim results from the phase 2 PALOMA-2 study. Poster presented at: American Society of Clinical Oncology (ASCO) Annual Meeting; May 31-June 4, 2024; Chicago, IL.
- Janssen Research & Development, LLC. A phase 2, open-label, parallel cohort study of subcutaneous amivantamab in multiple regimens in patients with advanced or metastatic solid tumors including EGFR-mutated non-small cell lung cancer. In: ClinicalTrials.gov [Internet]. Bethesda (MD): National Library of Medicine (US). 2000- [cited 2025 March 26]. Available from: https://clinicaltrials.gov/study/NCT05498428 NLM Identifier: NCT05498428.
- Lim SM, Han JY, Zhang J, et al. Subcutaneous after intravenous amivantamab in advanced NSCLC: initial results from PALOMA-2. Poster presented at: European Lung Cancer Congress (ELCC); March 26-29, 2025; Paris, France.