PD-1/PD-L1 expression in chromophobe renal cell carcinoma: An immunological exception?

Erlmeier F, Hartmann A, Autenrieth M, Wiedemann M, Ivanyi P, Steffens S, Weichert W (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Medical Oncology Humana Press

Book Volume: 33

Pages Range: 120

Journal Issue: 11

DOI: 10.1007/s12032-016-0833-x

Abstract

Immune checkpoint inhibitors targeting the inhibitory cross talk between tumor and immune cells have been approved for therapy in renal cell carcinoma (RCC). In contrast to clear cell RCC, little is known on PD-1/PD-L1 expression patterns in rarer RCC subtypes. The aim of this study was to evaluate the prevalence, distribution and prognostic impact of PD-1 and PD-L1 expression in chromophobe (ch)RCC. Patients who underwent renal surgery due to chRCC were retrospectively evaluated. Tumor specimen was analyzed for PD-1 and PD-L1 expression by immunohistochemistry. Expression data were correlated with clinic-pathological parameters including patient survival. Eighty-one chRCC patients were eligible for analysis, thereof 25 (30.9 %) and 11 (13.6 %) patients were positive for PD-1(+) tumor-infiltrating mononuclear cells (TIMCs) and tumoral PD-L1(+) expression, respectively. No significant associations were found for PD-1(+) TIMC or tumoral PD-L1(+) expression and clinical attributes. In addition, no differences in 5- and 10-year overall survival for PD-1(-) TIMC compared to PD-1(+) TIMC (90.5 and 72.2 vs. 100 and 75 %; p = 0.41) and for PD-L1(-) tumors compared to PD-L1(+) tumors (91.9 and 76.4 vs. 100 and 50 %; p = 0.48) were observed. In conclusion, to our knowledge this is the first study to evaluate the prognostic impact of PD-1 and PD-L1 in chRCC. PD-L1 does seem to be expressed in a minority of all chRCC, likewise only a minority of chRCC was infiltrated by PD-1-positive inflammatory cells. Neither PD-1(+) TIMC nor tumoral PD-L1(+) expression was associated with parameters of aggressiveness or survival.

Authors with CRIS profile

Arndt Hartmann Lehrstuhl für Allgemeine Pathologie und Pathologische Anatomie

Involved external institutions

Technische Universität München (TUM) DE Germany (DE) Universitätsklinikum Münster DE Germany (DE) Medizinische Hochschule Hannover (MHH) / Hannover Medical School DE Germany (DE) Ludwig-Maximilians-Universität (LMU) DE Germany (DE)

How to cite

APA:

Erlmeier, F., Hartmann, A., Autenrieth, M., Wiedemann, M., Ivanyi, P., Steffens, S., & Weichert, W. (2016). PD-1/PD-L1 expression in chromophobe renal cell carcinoma: An immunological exception? Medical Oncology, 33(11), 120. https://doi.org/10.1007/s12032-016-0833-x

MLA:

Erlmeier, Franziska, et al. "PD-1/PD-L1 expression in chromophobe renal cell carcinoma: An immunological exception?" Medical Oncology 33.11 (2016): 120.

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