Abstract
Objective
To validate our previous findings of high-level EGFR expression in GCCC using an expanded cohort of specimens and to further examine the molecular and cellular features of this aggressive malignancy to identify potentially actionable therapeutic targets.
Methods
The SEER database was queried to obtain the epidemiological data regarding the current national survival trends for GCCC. Immunohistochemistry (IHC) was used to examine the expression of EGFR, PD-1, and PD-L1. CiberSort analysis was used to analyze a previously published RNA-sequencing dataset obtained from a single patient diagnosed with GCCC.
Results
In comparison to squamous cell carcinomas and adenocarcinoma/adenosquamous carcinomas, GCCC was observed in younger patients (p < 0.001) and demonstrated inferior survival (p < 0.001). All (100%) of the specimens (8/8) exhibited immunoreactivity when stained for CD3ε (T-cell marker), EGFR, PD-1, and PD-L1 whereas CTLA4 expression was not detected. Analysis of RNA-sequencing data revealed that cetuximab and erlotinib altered the chemokine profile, lymphocyte abundance, and expression of inhibitory immune checkpoints in a single patient when combined with cytotoxic chemotherapy in a single patient.
Conclusions
The data from this descriptive study suggests that immune checkpoint blockade, whether single agent or in combination, may be a suitable therapeutic option for a disease for which targeted approaches do not currently exist.
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Data availability
Data and material available for review upon request.
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Acknowledgements
We thank Jean Richardson for support of the USC Department of Obstetrics & Gynecology Gynecologic Tissue and Fluid Repository and the Norris Comprehensive Cancer Center Translational Pathology Core (NIH P30CA014089).
Funding
Funded by USC Department of Gynecologic Oncology Research Fund.
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EB: principal investigator and manuscript author; TM: senior author, project concept and execution; MR: UMPC principal investigator; MR: University of Colorado Principal Investigator; RB: pathologist at UMPC; MP: pathologist at University of Colorado; SW: pathologist at USC, reviewed all samples for consistency; KM: SEER database analysis and figures; DdS: basic science advisory role; LR: Gyn Onc faculty supervisor; LT: basic science contributor; ES: logistical support.
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Erin Blake: none; Troy McEachron: none; Malcolm Ross: none; Megan Ross: none; Rohit Bhargava: none; Miriam Post: none; Saloni Walia: none; Koji Matsuo: Chugai (honorarium 2016), Springer (textbook editorial expense 2018), VBL Therapeutics (investigator meeting attendance expense 2019); Diane da Silva: Venn Biosciences (grant researching ovarian cancer biomarkers), Quantum screening (consulting fees); Lynda Roman: Tempus Lab (consultant > 2 years ago, none relevant to submission), Quantgene (consultant, not relevant to submission); Lilibeth Torno: none; Emily Silverstein: none.
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USC Health Sciences Institutional Review Board approved (HS-18-00266). Approval letter available upon request.
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404_2021_6164_MOESM1_ESM.pdf
Supplementary file1 Expression of CD3ε, CD8, PD-L1, PD1, and EGFR in cervical tissue unaffected by disease (PDF 13404 KB)
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Blake, E.A., Ross, M.S., Ross, M.E. et al. Immunohistochemical analysis of glassy cell carcinoma of the cervix reveals robust lymphocyte infiltrate and the expression of targetable inhibitory immune checkpoints. Arch Gynecol Obstet 305, 439–447 (2022). https://doi.org/10.1007/s00404-021-06164-x
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DOI: https://doi.org/10.1007/s00404-021-06164-x