Expression of the immune regulation antigen CD70 in osteosarcoma

Cancer Cell International
Jens Hw PahlArjan C Lankester

Abstract

Osteosarcoma is the most frequent bone cancer in children and young adults. The outcome of patients with advanced disease is dismal. Exploitation of tumor-immune cell interactions may provide novel therapeutic approaches. CD70-CD27 interactions are important for the regulation of adaptive immunity. CD70 expression has been reported in some solid cancers and implicated in tumor escape from immunosurveillance. In this study, expression of CD70 and CD27 was analyzed in osteosarcoma cell lines and tumor specimens. CD70 protein was expressed on most osteosarcoma cell lines (5/7) and patient-derived primary osteosarcoma cultures (4/6) as measured by flow cytometry. In contrast, CD70 was detected on few Ewing sarcoma cell lines (5/15) and was virtually absent from neuroblastoma (1/7) and rhabdomyosarcoma cell lines (0/5). CD70(+) primary cultures were derived from CD70(+) osteosarcoma lesions. CD70 expression in osteosarcoma cryosections was heterogeneous, restricted to tumor cells and not attributed to infiltrating CD3(+) T cells as assessed by immunohistochemistry/immunofluorescence. CD70 was detected in primary (1/5) but also recurrent (2/4) and metastatic (1/3) tumors. CD27, the receptor for CD70, was neither detected on tumor cel...Continue Reading

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Citations

Feb 26, 2016·Expert Opinion on Therapeutic Targets·Harald Wajant
Mar 24, 2016·Cytometry. Part B, Clinical Cytometry·Ray Chun-Fai ChanAmitabh Gaur
Aug 10, 2017·Journal of Neuropathology and Experimental Neurology·Drew PrattMartha Quezado
Oct 13, 2020·Pharmacology & Therapeutics·Sandeep KumarAjay Rana

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Methods Mentioned

BETA
biopsies
FCS
FACS
flow cytometry
biopsy

Software Mentioned

Cell
^ B
LAS
AF
BD Cell Quest ProTM
Graphpad Prism

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