1. Lesion-Level Response Dynamics to Programmed Cell Death Protein (PD-1) Blockade
- Author
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Andrew J. Plodkowski, Dung T. Le, Juan C. Osorio, Jennifer N. Durham, Hira Rizvi, Helena A. Yu, Michelle S. Ginsberg, Gregory J. Riely, Jamie E. Chaft, Luis A. Diaz, Peter Sawan, Joseph G. Crompton, Azadeh Namakydoust, Kathryn C. Arbour, Matthew D. Hellmann, Darragh Halpenny, and Barzin Y. Nabet
- Subjects
Adult ,Male ,0301 basic medicine ,Cancer Research ,Programmed cell death ,Lung Neoplasms ,Programmed Cell Death 1 Receptor ,Lesion ,03 medical and health sciences ,Antineoplastic Agents, Immunological ,0302 clinical medicine ,Text mining ,Carcinoma, Non-Small-Cell Lung ,Biology of Neoplasia ,Protein PD-1 ,Programmed cell death 1 ,Humans ,Medicine ,Aged ,Aged, 80 and over ,Antitumor immunity ,biology ,business.industry ,Middle Aged ,Blockade ,030104 developmental biology ,Oncology ,030220 oncology & carcinogenesis ,Disease Progression ,Cancer research ,biology.protein ,Female ,medicine.symptom ,business - Abstract
PURPOSE Response to programmed cell death protein 1 (PD-1) blockade is often conceptualized as resulting from reinvigoration of tumor-infiltrating lymphocytes. However, recruited antitumor immunity from the periphery may also be an important contributor to response. A detailed assessment of the response dynamics of individual metastasis could provide insight to the systemic and local features that mediate response and resistance to immunotherapy. MATERIALS AND METHODS Patients with metastatic non–small-cell lung cancer (NSCLC) or mismatch repair deficiency (MMRD) carcinoma treated with PD-1 monotherapy were evaluated independently. Absolute and percent change of each target lesion were quantified at each computed tomography scan using RECIST. Patterns of progression were predefined as systemic or mixed and were correlated with clinical outcomes. RESULTS A total of 761 individual lesions from 214 patients with NSCLC and 290 lesions from 78 patients with MMRD carcinoma were examined. Individual target lesion responses aligned with best overall response of each patient (85% NSCLC and 93% MMRD lesions responded in patients with partial response/complete response). In responding patients, timing of response was uniform (73% NSCLC and 76% MMRD lesions responded synchronously), and deeper responses were associated with prolonged progression-free survival and overall survival. By contrast, at progression, mixed progression was common (45% of NSCLC and 53% of MMRD) and associated with improved survival compared with those who experienced systemic progression (NSCLC hazard ratio [HR], 0.58; P = .001; MMRD HR, 0.40; P = .07). Organ sites had differential responses, with lymph node and liver metastasis among the most and least responsive, respectively. CONCLUSION Temporal-spatial patterns of response across individual metastases tend to be uniform, favoring the role of peripheral, clonally directed antitumor immunity as a key mediator of response to PD-1 blockade. In contrast, progression is more heterogeneous, potentially revealing the clinical importance of local features and intertumoral heterogeneity.
- Published
- 2019