癌症研究
免疫检查点
医学
转移
免疫系统
肾透明细胞癌
癌症
肾细胞癌
免疫疗法
免疫学
病理
内科学
作者
Maite Emaldi,Esther Rey‐Iborra,Arnaldo Marín,Lorena Mosteiro,David Lecumberri,Tove Øyjord,Noémie Roncier,Gunhild M. Mælandsmo,J.C. Angulo,Peio Errarte,Gorka Larrinaga,Rafael Pulido,José I. López,Caroline E. Nunes‐Xavier
出处
期刊:OncoImmunology
[Informa]
日期:2024-11-01
卷期号:13 (1)
标识
DOI:10.1080/2162402x.2024.2419686
摘要
Immune checkpoint inhibitors in combination with tyrosine kinase inhibitors (TKIs) are improving the response rates of advanced renal cancer patients. However, many treated patients do not respond, making novel immune checkpoint-based immunotherapies potentially clinically beneficial only for specific groups of patients. We detected high expression of the immune checkpoint protein B7-H3 in clear cell renal cell carcinomas (ccRCCs) and evaluated B7-H3 immunohistochemistry staining in tissue microarray samples from two distinct renal cancer cohorts. B7-H3 was highly expressed in approximately 50% of primary tumors and in 30% of metastatic lesions. B7-H3 expression in primary tumors correlated with tumor necrosis, sarcomatoid transformation, disease-free survival, and synchronous metastasis, while B7-H3 expression in metastasis correlated with metastases to the lymph nodes. Gene expression analysis revealed the association of B7-H3 expression with gene expression scores involved in T cell exhaustion and myeloid immune evasion, as well as with PI3K/AKT and JAK/STAT pathways. Furthermore, knocking down B7-H3 expression in renal cancer cells by siRNA and CRISPR/Cas resulted in lower 2D and 3D cell proliferation and viability as well as increased sensitivity to TKI axitinib. Together, our findings suggest a pro-oncogenic and immune evasive role for B7-H3 in ccRCC and highlight B7-H3 as an actionable novel immune checkpoint protein in combination with TKI in advanced renal cancer.
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