Renal cell carcinoma (RCC) constitutes more than 90 % of primary kidney tumors with the development of metastatic disease in the lung, bone, liver, and brain. Clear-cell RCC (CCRCC) is the most common histologic form of sporadic kidney cancer where the majority of tumors have inactivation of the von Hippel-Lindau (VHL) tumor-suppressor gene resulting in the accumulation of hypoxia-inducible factor (HIF) leading to dysregulation of cell growth and angiogenesis. Understanding of the genetic changes in RCC and the downstream events have led to the development of tyrosine kinase inhibitors (TKI) that target HIF-regulated proteins which currently represents front-line therapy for metastatic disease although resistance develops in most patients overtime. Despite the fact that RCC is an immunogenic tumor, there is mounting evidence that immune cells and inflammatory pathways can enhance tumor growth and immune escape. However, recent studies are beginning to uncover the mechanisms of immune escape in RCC, and the role inflammatory immune cells and cytokines play is this process. These new findings have led to renewed interest in the use of immunotherapy for the treatment of this disease that includes strategies to regulate inflammatory responses. Here, we will discuss the different inflammatory signaling pathways (e.g., VHL, hypoxia, TNF-α, STAT, and TGF-β) and the downstream transcription factors, cytokines, and chemokines involved in tumor development, and disease progression. This will include assessment of the role inflammatory molecules (e.g., pVHL, TGFb, IL6, select chemokines/chemokine receptors) play in promoting cell transformation, survival, proliferation of tumor cells, and metastasis derived from in vitro and in vivo studies. Included is a section on how select inflammatory cells (TAM, MDSC, and neutrophils) promote tumor evasion of immune cells. We also provide examples of molecules/cells that correlate negatively (CXCL12, CXCR4, and MMP, neutrophils, and MDSC) and positively (TH1 cells, IP-10, and MIG) with tumor progression and survival. Finally, there is a discussion of different inhibitors of inflammation that may be useful in the treatment of RCC.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.