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Published in: Journal of Neuro-Oncology 3/2020

01-05-2020 | Pituitary Adenoma | Laboratory Investigation

In silico analysis of the immunological landscape of pituitary adenomas

Authors: Jacky T. Yeung, Matthew D. Vesely, Danielle F. Miyagishima

Published in: Journal of Neuro-Oncology | Issue 3/2020

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Abstract

Purpose

Immunotherapy has gained traction in the treatment of solid tumors but the immunological landscape of pituitary adenomas is not well defined. We sought to investigate the immunological composition in pituitary adenomas using RNA deconvolution (CIBERSORTx) on an existing gene expression dataset for pituitary adenomas.

Methods

We applied an established computational approach (CIBERSORTx) on 134 pituitary adenomas from a previously published gene expression dataset to infer the proportions of 22 subsets of immune cells. We investigated associations between each immune cell type and tumor subtype.

Results

We found that the majority of infiltrating immune cells within pituitary adenomas were comprised of M2 macrophages followed by resting CD4+ memory T cells and mast cells. Silent pituitary tumors have higher M2 macrophage fractions when compared to other subtypes. In contrast, Cushing pituitary tumors, both overt and subclinical cases, had higher CD8+ T cells fractions than GH tumors, prolactinomas, hyperthyroid tumors, and silent tumors.

Conclusions

RNA deconvolution of the immune infiltrates of pituitary adenomas using CIBERSORTx suggests that most pituitary adenomas comprise of M2 macrophages, but each adenoma subtype has a unique immune landscape. This may have implications in targeting each adenoma subtype with different immunotherapies.
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Metadata
Title
In silico analysis of the immunological landscape of pituitary adenomas
Authors
Jacky T. Yeung
Matthew D. Vesely
Danielle F. Miyagishima
Publication date
01-05-2020
Publisher
Springer US
Published in
Journal of Neuro-Oncology / Issue 3/2020
Print ISSN: 0167-594X
Electronic ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-020-03476-x

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