PD-L1 expression in gastroenteropancreatic neuroendocrine neoplasms grade 3

Abir Salwa Ali; Seppo W Langer; Birgitte Federspiel; Geir Olav Hjortland; Henning Grønbæk; Morten Ladekarl; Staffan Welin; Lene Weber Vestermark; Johanna Arola; Pia Osterlund; Ulrich Knigge; Halfdan Sørbye; Patrick Micke; Lars Grimelius; Malin Grönberg; Eva Tiensuu Janson

doi:10.1371/journal.pone.0243900

PD-L1 expression in gastroenteropancreatic neuroendocrine neoplasms grade 3

Abir Salwa Ali, Seppo W Langer, Birgitte Federspiel, Geir Olav Hjortland, Henning Grønbæk, Morten Ladekarl, Staffan Welin, Lene Weber Vestermark, Johanna Arola, Pia Osterlund, Ulrich Knigge, Halfdan Sørbye, Patrick Micke, Lars Grimelius, Malin Grönberg, Eva Tiensuu Janson

9 Citations (Scopus)

Abstract

Gastroenteropancreatic neuroendocrine neoplasms grade 3 (GEP-NENs G3) are rare tumors. These highly aggressive neoplasms are traditionally treated with platinum-based chemotherapy in combination with etoposide. Immune checkpoint proteins such as programmed cell death ligand (PD-L1) may have a role in different cancers allowing them escape the immune system and hence, progress. We aimed to investigate the immunohistochemical expression of PD-L1 in GEP-NEN G3 and evaluate its correlation to clinical parameters. In a cohort of 136 patients, 14 (10%) expressed PD-L1 immunoreactivity; four (3%) patients in the tumor cells and 10 (7%) had immunoreactive immune cells. PD-L1 expression did not correlate to clinical parameters, progression-free survival or overall survival. We conclude that PD-L1 expression is present only in a subset of GEP-NEN G3 patients. Further studies are needed to fully understand the role of PD-L1 in patients with GEP-NEN G3, including the future possibility for treatment with immune checkpoint inhibitors.

Original language	English
Article number	e0243900
Journal	PLoS One
Volume	15
Issue number	12 December
Pages (from-to)	e0243900
ISSN	1932-6203
DOIs	https://doi.org/10.1371/journal.pone.0243900
Publication status	Published - Dec 2020

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Ali, A. S., Langer, S. W., Federspiel, B., Hjortland, G. O., Grønbæk, H., Ladekarl, M., Welin, S., Weber Vestermark, L., Arola, J., Osterlund, P., Knigge, U., Sørbye, H., Micke, P., Grimelius, L., Grönberg, M., & Tiensuu Janson, E. (2020). PD-L1 expression in gastroenteropancreatic neuroendocrine neoplasms grade 3. PLoS One, 15(12 December), e0243900. [e0243900]. https://doi.org/10.1371/journal.pone.0243900

Ali, AS, Langer, SW, Federspiel, B, Hjortland, GO, Grønbæk, H, Ladekarl, M, Welin, S, Weber Vestermark, L, Arola, J, Osterlund, P, Knigge, U, Sørbye, H, Micke, P, Grimelius, L, Grönberg, M & Tiensuu Janson, E 2020, 'PD-L1 expression in gastroenteropancreatic neuroendocrine neoplasms grade 3', PLoS One, vol. 15, no. 12 December, e0243900, pp. e0243900. https://doi.org/10.1371/journal.pone.0243900

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title = "PD-L1 expression in gastroenteropancreatic neuroendocrine neoplasms grade 3",

abstract = "Gastroenteropancreatic neuroendocrine neoplasms grade 3 (GEP-NENs G3) are rare tumors. These highly aggressive neoplasms are traditionally treated with platinum-based chemotherapy in combination with etoposide. Immune checkpoint proteins such as programmed cell death ligand (PD-L1) may have a role in different cancers allowing them escape the immune system and hence, progress. We aimed to investigate the immunohistochemical expression of PD-L1 in GEP-NEN G3 and evaluate its correlation to clinical parameters. In a cohort of 136 patients, 14 (10%) expressed PD-L1 immunoreactivity; four (3%) patients in the tumor cells and 10 (7%) had immunoreactive immune cells. PD-L1 expression did not correlate to clinical parameters, progression-free survival or overall survival. We conclude that PD-L1 expression is present only in a subset of GEP-NEN G3 patients. Further studies are needed to fully understand the role of PD-L1 in patients with GEP-NEN G3, including the future possibility for treatment with immune checkpoint inhibitors.",

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AU - Ali, Abir Salwa

AU - Langer, Seppo W

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AU - Grønbæk, Henning

AU - Ladekarl, Morten

AU - Welin, Staffan

AU - Weber Vestermark, Lene

AU - Arola, Johanna

AU - Osterlund, Pia

AU - Knigge, Ulrich

AU - Sørbye, Halfdan

AU - Micke, Patrick

AU - Grimelius, Lars

AU - Grönberg, Malin

AU - Tiensuu Janson, Eva

PY - 2020/12

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N2 - Gastroenteropancreatic neuroendocrine neoplasms grade 3 (GEP-NENs G3) are rare tumors. These highly aggressive neoplasms are traditionally treated with platinum-based chemotherapy in combination with etoposide. Immune checkpoint proteins such as programmed cell death ligand (PD-L1) may have a role in different cancers allowing them escape the immune system and hence, progress. We aimed to investigate the immunohistochemical expression of PD-L1 in GEP-NEN G3 and evaluate its correlation to clinical parameters. In a cohort of 136 patients, 14 (10%) expressed PD-L1 immunoreactivity; four (3%) patients in the tumor cells and 10 (7%) had immunoreactive immune cells. PD-L1 expression did not correlate to clinical parameters, progression-free survival or overall survival. We conclude that PD-L1 expression is present only in a subset of GEP-NEN G3 patients. Further studies are needed to fully understand the role of PD-L1 in patients with GEP-NEN G3, including the future possibility for treatment with immune checkpoint inhibitors.

AB - Gastroenteropancreatic neuroendocrine neoplasms grade 3 (GEP-NENs G3) are rare tumors. These highly aggressive neoplasms are traditionally treated with platinum-based chemotherapy in combination with etoposide. Immune checkpoint proteins such as programmed cell death ligand (PD-L1) may have a role in different cancers allowing them escape the immune system and hence, progress. We aimed to investigate the immunohistochemical expression of PD-L1 in GEP-NEN G3 and evaluate its correlation to clinical parameters. In a cohort of 136 patients, 14 (10%) expressed PD-L1 immunoreactivity; four (3%) patients in the tumor cells and 10 (7%) had immunoreactive immune cells. PD-L1 expression did not correlate to clinical parameters, progression-free survival or overall survival. We conclude that PD-L1 expression is present only in a subset of GEP-NEN G3 patients. Further studies are needed to fully understand the role of PD-L1 in patients with GEP-NEN G3, including the future possibility for treatment with immune checkpoint inhibitors.

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PD-L1 expression in gastroenteropancreatic neuroendocrine neoplasms grade 3

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