Chemo-immunotherapy combination after PD-1 inhibitor failure improves clinical outcomes in metastatic melanoma patients.

Authors

null

Jesus Vera Aguilera

Mayo Clinic, Rochester, MN

Jesus Vera Aguilera, Jonas Paludo, Jarrett Failing, Robert R. McWilliams, Lisa A. Kottschade, Matthew Stephen Block, Svetomir Markovic, Roxana Stefania Dronca, Yiyi Yan

Organizations

Mayo Clinic, Rochester, MN, Mayo Clinic Minnesota, Rochester, MN

Research Funding

Other

Background: Clinical management of metastatic melanoma (MM) after PD-1 blockade failure remains challenging and lacks a standard of care. Chemo-immunotherapy (CIT) combinations have demonstrated favorable efficacy and safety profiles in lung cancer patients. In this study, we compared the clinical outcomes of CIT with immunotherapy or chemotherapy alone after PD-1 blockade failure. Methods: We reviewed MM patients seen at Mayo Clinic between Jan, 2012 and Jun, 2018 who failed anti-PD1 therapy and received subsequent CIT, or immune checkpoint inhibitors (ICI) or chemotherapy alone. A total of 60 patients were analyzed, the CIT cohort [n=33 (55%)] treatment consisted of carboplatin/paclitaxel (n=29), nab-paclitaxel (n=2), paclitaxel (n=1), and temozolomide (n=1). In the ICI (n=9) or chemotherapy alone cohort (n=18) [n=27 (45%)], treatment consisted of carboplatin/paclitaxel (n=11), temozolomide (n=4), nab-paclitaxel (n=3), ipilimumab/nivolumab (n=4), pembrolizumab (n=4), or nivolumab (n=1). Results: Patients in the CIT cohort had a median OS of 3.5 years (95% CI: 1.7-NR) compared to 1.8 years (95% CI: 0.9-2) in the ICI or chemotherapy alone cohort, p=0.02. The median EFS following CIT was 7.6 months (95% CI: 6-10) compared to 3.4 months (95% CI: 2.8-4.1) following either ICI or chemotherapy alone, p=0.0005. A trend towards longer median EFS with use of CIT was seen in patients with BRAF wild-type [median 9 months (95% CI: 6-12)] compared to those harboring a BRAF mutation [median 6.5 months (95% CI: 1.8-9.1), p=0.29]. Side effects were similar among both groups. Conclusions: In MM patients who have failed anti-PD-1 therapy, the CIT combination showed favorable clinical outcomes and acceptable safety profile. This regimen should be considered for MM pts in this setting who have limited treatment options.

CIT
(n=33)
ICI or Chemotherapy Alone (n=27)p value
Age, median (range)56 (23-77)58 (21-77)0.97
Male sex, n (%)23 (70)16 (59)0.40
Brain metastasis, n (%)12 (36)8 (30)0.58
BRAF mutation, n (%)12 (36)9 (33)0.80
ORR, n (%)19 (59)4 (15)0.0003
Response, n (%)5 (15)2 (7)
CR14 (43)2 (7)
PR1 (3)1 (4)
SD12 (36)22 (82)
PD1 (3)0
Unknown

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Abstract Details

Meeting

2019 ASCO-SITC Clinical Immuno-Oncology Symposium

Session Type

Poster Session

Session Title

Poster Session B

Track

Breast and Gynecologic Cancers,Developmental Therapeutics,Genitourinary Cancer,Head and Neck Cancer,Lung Cancer,Melanoma/Skin Cancers,Gastrointestinal Cancer,Combination Studies,Implications for Patients and Society,Miscellaneous Cancers,Hematologic Malignancies

Sub Track

Immune Checkpoints and Stimulatory Receptors

Citation

J Clin Oncol 37, 2019 (suppl 8; abstr 138)

DOI

10.1200/JCO.2019.37.8_suppl.138

Abstract #

138

Poster Bd #

F3

Abstract Disclosures