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Song N, Wang Z, Shi P, Cui K, Fan Y, Zeng L, Di W, Li J, Su W, Wang H. Comprehensive analysis of signaling lymphocyte activation molecule family as a prognostic biomarker and correlation with immune infiltration in clear cell renal cell carcinoma. Oncol Lett 2024; 28:354. [PMID: 38881710 PMCID: PMC11176890 DOI: 10.3892/ol.2024.14487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 04/17/2024] [Indexed: 06/18/2024] Open
Abstract
Clear cell renal cell carcinoma (ccRCC) is a common type of kidney cancer and accounts for 2-3% of all cancer cases. Furthermore, a growing number of immunotherapy approaches are being used in antitumor treatment. Signaling lymphocyte activation molecule family (SLAMF) members have been well studied in several cancers, whereas their roles in ccRCC have not been investigated. The present study comprehensively assessed the molecular mechanisms of SLAMF members in ccRCC, performed using The Cancer Genome Atlas database, with analysis of gene transcription, prognosis, biological function, clinical features, tumor-associated immune cells and the correlation with programmed cell death protein 1/programmed death-ligand 1 immune checkpoints. Simultaneously, the Tumor Immune Dysfunction and Exclusion algorithm was used to predict the efficacy of immune checkpoint blockade (ICB) therapy in patients with high and low SLAMF expression levels. The results demonstrated that all SLAMF members were highly expressed in ccRCC, and patients with high expression levels of SLAMF1, 4, 7 and 8 had a worse prognosis that those with low expression. SLAMF members were not only highly associated with immune activation but also with immunosuppressive agents. The level of immune cell infiltration was associated with the prognosis of patients with ccRCC with high SLAMF expression. Moreover, high ICB response rates were observed in patients with high expression levels of SMALF1 and 4. In summary, SLAMF members may serve as future potential biomarkers for predicting the prognosis of ccRCC and emerge as a novel immunotherapy target.
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Affiliation(s)
- Na Song
- Department of Pathology, Xinxiang Key Laboratory of Tumor Precision Medicine, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
- Department of Pathology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453000, P.R. China
| | - Ziwei Wang
- Department of Pathology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453000, P.R. China
| | - Pingyu Shi
- Department of Pathology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453000, P.R. China
| | - Kai Cui
- Department of Pathology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453000, P.R. China
| | - Yanwu Fan
- Department of Pathology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453000, P.R. China
| | - Liqun Zeng
- Department of Pathology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453000, P.R. China
| | - Wenyu Di
- Department of Pathology, Xinxiang Key Laboratory of Tumor Precision Medicine, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
| | - Jinsong Li
- Department of Pathology, Xinxiang Key Laboratory of Tumor Precision Medicine, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
| | - Wei Su
- Department of Pathology, Xinxiang Key Laboratory of Tumor Precision Medicine, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
| | - Haijun Wang
- Department of Pathology, Xinxiang Key Laboratory of Tumor Precision Medicine, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
- Department of Pathology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan 453000, P.R. China
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Zhang Z, Hu J, Ishihara M, Sharrow AC, Flora K, He Y, Wu L. The miRNA-21-5p Payload in Exosomes from M2 Macrophages Drives Tumor Cell Aggression via PTEN/Akt Signaling in Renal Cell Carcinoma. Int J Mol Sci 2022; 23:3005. [PMID: 35328425 PMCID: PMC8949275 DOI: 10.3390/ijms23063005] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/06/2022] [Accepted: 03/08/2022] [Indexed: 12/15/2022] Open
Abstract
M2 macrophages in the tumor microenvironment are important drivers of cancer metastasis. Exosomes play a critical role in the crosstalk between different cells by delivering microRNAs or other cargos. Whether exosomes derived from pro-tumorigenic M2 macrophages (M2-Exos) could modulate the metastatic behavior of renal cell carcinoma (RCC) is unclear. This study found that M2-Exos promotes migration and invasion in RCC cells. Inhibiting miR-21-5p in M2-Exos significantly reversed their pro-metastatic effects on RCC cells in vitro and in the avian embryo chorioallantoic membrane in vivo tumor model. We further found that the pro-metastatic mechanism of miR-21-5p in M2-Exos is by targeting PTEN-3'UTR to regulate PTEN/Akt signaling. Taken together, our results demonstrate that M2-Exos carries miR-21-5p promote metastatic features of RCC cells through PTEN/Akt signaling. Reversing this could serve as a novel approach to control RCC metastasis.
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Affiliation(s)
- Zhicheng Zhang
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA; (Z.Z.); (J.H.); (M.I.); (A.C.S.); (K.F.)
| | - Junhui Hu
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA; (Z.Z.); (J.H.); (M.I.); (A.C.S.); (K.F.)
| | - Moe Ishihara
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA; (Z.Z.); (J.H.); (M.I.); (A.C.S.); (K.F.)
| | - Allison C. Sharrow
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA; (Z.Z.); (J.H.); (M.I.); (A.C.S.); (K.F.)
| | - Kailey Flora
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA; (Z.Z.); (J.H.); (M.I.); (A.C.S.); (K.F.)
| | - Yao He
- Department of Microbiology, Immunology and Molecular Genetics, UCLA, Los Angeles, CA 90095, USA;
| | - Lily Wu
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA; (Z.Z.); (J.H.); (M.I.); (A.C.S.); (K.F.)
- Department of Urology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
- Jonsson Comprehensive Cancer Center, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
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PET/MR Imaging of a Lung Metastasis Model of Clear Cell Renal Cell Carcinoma with (2S,4R)-4-[ 18F]Fluoroglutamine. Mol Imaging Biol 2022; 24:959-972. [PMID: 35732988 PMCID: PMC9681699 DOI: 10.1007/s11307-022-01747-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 05/10/2022] [Accepted: 06/09/2022] [Indexed: 12/29/2022]
Abstract
PURPOSE Metabolic reprogramming plays an important role in the tumorigenesis of clear cell renal cell carcinoma (ccRCC). Currently, positron emission tomography (PET) reporters are not used clinically to visualize altered glutamine metabolism in ccRCC, which greatly hinders detection, staging, and real-time therapeutic assessment. We sought to determine if (2S,4R)-4-[18F]fluoroglutamine ([18F]FGln) could be used to interrogate altered glutamine metabolism in ccRCC lesions in the lung. PROCEDURES We generated a novel ccRCC lung lesion model using the ccRCC cell line UMRC3 stably transfected with GFP and luciferase constructs. This cell line was used for characterization of [18F]FGln uptake and retention by transport analysis in cell culture and by PET/MRI (magnetic resonance imaging) in animal models. Tumor growth in animal models was monitored using bioluminescence (BLI) and MRI. After necropsy, UMRC3 tumor growth in lung tissue was verified by fluorescence imaging and histology. RESULTS In UMRC3 cells, [18F]FGln cell uptake was twofold higher than cell uptake in normal kidney HEK293 cells. Tracer cell uptake was reduced by 60-90% in the presence of excess glutamine in the media and by 20-50% upon treatment with V-9302, an inhibitor of the major glutamine transporter alanine-serine-cysteine transporter 2 (ASCT2). Furthermore, in UMRC3 cells, [18F]FGln cell uptake was reduced by siRNA knockdown of ASCT2 to levels obtained by the addition of excess exogenous glutamine. Conversely, [18F]FGln cellular uptake was increased in the presence of the glutaminase inhibitor CB-839. Using simultaneous PET/MRI for visualization, retention of [18F]FGln in vivo in ccRCC lung tumors was 1.5-fold greater than normal lung tissue and twofold greater than muscle. In ccRCC lung tumors, [18F]FGln retention did not change significantly upon treatment with CB-839. CONCLUSIONS We report one of the first direct orthotopic mouse models of ccRCC lung lesions. Using PET/MR imaging, lung tumors were easily discerned from normal tissue. Higher uptake of [18F]FGln was observed in a ccRCC cell line and lung lesions compared to HEK293 cells and normal lung tissue, respectively. [18F]FGln cell uptake was modulated by exogenous glutamine, V-9302, siRNA knockdown of ASCT2, and CB-839. Interestingly, in a pilot therapeutic study with CB-839, we observed no difference in treated tumors relative to untreated controls. This was in contrast with cellular studies, where CB-839 increased glutamine uptake.
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Challenges and advances for the treatment of renal cancer patients with brain metastases: From immunological background to upcoming clinical evidence on immune-checkpoint inhibitors. Crit Rev Oncol Hematol 2021; 163:103390. [PMID: 34090998 DOI: 10.1016/j.critrevonc.2021.103390] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/27/2021] [Accepted: 05/25/2021] [Indexed: 01/12/2023] Open
Abstract
The introduction of checkpoint inhibitors (ICIs) in renal cell carcinoma (RCC) treatment landscape, resulted in improvements in overall survival (OS) in metastatic patients. Brain metastases (BMs) are a specific metastatic site of interest representing a predictive factor of poor prognosis. Patients with BMs were usually excluded from prospective clinical trials in the past. Despite recent evidence suggest the efficacy and safety of ICIs, the BMs treatment remains a challenge; the immunotherapy responsiveness seems to be multifactorial and dependent on several factors, such as the genetic intratumor heterogeneity and the immunosuppressive role of the brain tumor microenvironment. This review, starting from the immunological background in RCC BMs, provide an overview of the upcoming evidence from clinical trials, address the issues related to the neuroradiological immunotherapy response evaluation and, with a look to the future, describes how the epigenetic modulation of immune evasion could represent a background for new therapeutic strategies.
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