Naslov
PD-L1 Dependent Immunogenic Landscape in Hot Lung Adenocarcinomas Identified by Transcriptome Analysis

Autori
Kirfel, Jutta ; Charlotte Kümpers, Christiane ; Fähnrich, Anke ; Heidel, Carsten ; Jokić, Mladen ; Vlašić, Ignacija ; Marwitz, Sebastian ; Goldmann, Torsten ; Pasternack, Helen ; Bohnet, Sabine ; Jonigk, Danny ; Kühnel, Mark P ; Offermann, Anne ; Busch, Hauke ; Perner, Sven

Izvornik
Cancers (2072-6694) 13 (2021), 18; 4562, 16

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
cold ; hot ; immune phenotype ; lung adenocarcinoma (LUAD) ; programmed cell death-ligand 1 (PD-L1) ; protein ; transcriptome

Sažetak
Background: Lung cancer is the most frequent cause of cancer-related deaths worldwide. The clinical development of immune checkpoint blockade has dramatically changed the treatment paradigm for patients with lung cancer. Yet, an improved understanding of PD-1/PD-L1 checkpoint blockade- responsive biology is warranted. Methods: We aimed to identify the landscape of immune cell infiltration in primary lung adenocarcinoma (LUAD) in the context of tumoral PD-L1 expression and the extent of immune infiltration ("hot" vs. "cold" phenotype). The study comprises LUAD cases (n = 138) with "hot" (≥150 lymphocytes/HPF) and "cold" (<150 lymphocytes/HPF) tumor immune phenotype and positive (>50%) and negative (<1%) tumor PD-L1 expression, respectively. Tumor samples were immunohistochemically analyzed for expression of PD-L1, CD4, and CD8, and further investigated by transcriptome analysis. Results: Gene set enrichment analysis defined complement, IL-JAK- STAT signaling, KRAS signaling, inflammatory response, TNF-alpha signaling, interferon-gamma response, interferon-alpha response, and allograft rejection as significantly upregulated pathways in the PD-L1-positive hot subgroup. Additionally, we demonstrated that STAT1 is upregulated in the PD- L1-positive hot subgroup and KIT in the PD-L1- negative hot subgroup. Conclusion: The presented study illustrates novel aspects of PD-L1 regulation, with potential biological relevance, as well as relevance for immunotherapy response stratification.

Izvorni jezik
Engleski

Znanstvena područja
Temeljne medicinske znanosti

POVEZANOST RADA