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Scur M, Parsons BD, Dey S, Makrigiannis AP. The diverse roles of C-type lectin-like receptors in immunity. Front Immunol 2023; 14:1126043. [PMID: 36923398 PMCID: PMC10008955 DOI: 10.3389/fimmu.2023.1126043] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 02/14/2023] [Indexed: 03/03/2023] Open
Abstract
Our understanding of the C-type lectin-like receptors (CTLRs) and their functions in immunity have continued to expand from their initial roles in pathogen recognition. There are now clear examples of CTLRs acting as scavenger receptors, sensors of cell death and cell transformation, and regulators of immune responses and homeostasis. This range of function reflects an extensive diversity in the expression and signaling activity between individual CTLR members of otherwise highly conserved families. Adding to this diversity is the constant discovery of new receptor binding capabilities and receptor-ligand interactions, distinct cellular expression profiles, and receptor structures and signaling mechanisms which have expanded the defining roles of CTLRs in immunity. The natural killer cell receptors exemplify this functional diversity with growing evidence of their activity in other immune populations and tissues. Here, we broadly review select families of CTLRs encoded in the natural killer cell gene complex (NKC) highlighting key receptors that demonstrate the complex multifunctional capabilities of these proteins. We focus on recent evidence from research on the NKRP1 family of CTLRs and their interaction with the related C-type lectin (CLEC) ligands which together exhibit essential immune functions beyond their defined activity in natural killer (NK) cells. The ever-expanding evidence for the requirement of CTLR in numerous biological processes emphasizes the need to better understand the functional potential of these receptor families in immune defense and pathological conditions.
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Affiliation(s)
- Michal Scur
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada
| | - Brendon D Parsons
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada
| | - Sayanti Dey
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada
| | - Andrew P Makrigiannis
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada
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CLEC12B suppresses lung cancer progression by inducing SHP-1 expression and inactivating the PI3K/AKT signaling pathway. Exp Cell Res 2021; 409:112914. [PMID: 34780782 DOI: 10.1016/j.yexcr.2021.112914] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 12/25/2022]
Abstract
Lung cancer is the leading cause of cancer mortality worldwide. CLEC12B, a C-type lectin-like receptor, is low-expressed in lung cancer tissues. However, the function of CLEC12B in lung cancer and its underlying mechanism remain unclear. Here, an obvious down-regulation of CLEC12B was observed in lung cancer cells compared with the normal lung epithelial cells. CLEC12B over-expression suppressed cell viability and cell cycle entry in lung cancer, along with the reduction of PCNA and cyclin D1 expressions, while silencing CLEC12B possessed the opposite effects. Over-expression of CLEC12B promoted lung cancer cell apoptosis, accompanied by decreased Bcl-2 and increased Bax, cleaved caspase-3 and cleaved caspase-9. Moreover, CLEC12B decreased phosphorylation of PI3K-p85 and AKT proteins. By contrast, CLEC12B knockdown activated the PI3K/AKT pathway. In vivo, CLEC12B inhibited tumor growth in lung cancer, which can be reversed by CLEC12B inhibition. Co-IP and immunofluorescence assays confirmed the interaction between CLEC12B and SHP-1, and CLEC12B over-expression increased SHP-1 level. Furthermore, knocking down SHP-1 abrogated the above biological phenotypes caused by CLEC12B elevation. Taken together, our findings demonstrate that CLEC12B serves as a tumor-suppressing gene in lung cancer through positively regulating SHP-1 expression, which may be mediated by the PI3K/AKT signaling pathway.
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SH3BGRL3, transcribed by STAT3, facilitates glioblastoma tumorigenesis by activating STAT3 signaling. Biochem Biophys Res Commun 2021; 556:114-120. [PMID: 33839406 DOI: 10.1016/j.bbrc.2021.03.165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 03/31/2021] [Indexed: 12/19/2022]
Abstract
Glioblastoma (GBM) is the most aggressive tumors of the central nervous system. Here, we report that SH3 binding glutamic acid-rich protein like 3 (SH3BGRL3) was extremely highly expressed in GBM and glioma stem cells. SH3BGRL3 high expression associates with worse survival of GBM patients. Functionally, Targeting SH3BGRL3 obviously impairs GSCs self-renewal in vitro. Most importantly, we first report that SH3BGRL3 is a direct transcriptional target gene of signal transducer and activator of transcription 3 (STAT3) and thereby activating STAT3 signaling in turn. Additionally, forced expression of the constitutively activated STAT3 (STAT3-C) rescued GSCs self-renewal inhibited by SH3BGRL3 silencing. Collectively, we first identified a critical positive feedback loop between SH3BGRL3 and STAT3, which facilitates the tumorigenic potential of GBM.
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Zhu Y, Gong Y, Li A, Chen M, Kang D, Liu J, Yuan Y. Differential Proteomic Analysis Reveals Protein Networks and Pathways that May Contribute to Helicobacter pylori FKBP-Type PPIase-Associated Gastric Diseases. Proteomics Clin Appl 2017; 12:e1700127. [PMID: 29148176 DOI: 10.1002/prca.201700127] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Revised: 10/21/2017] [Indexed: 12/18/2022]
Abstract
PURPOSE Though Helicobacter pylori (H. pylori) has been classified as class I carcinogen, key virulence factor generated by H. pylori that causes gastric cancer remains to be fully determined. Recently, we identified a gastric cancer-associated H. pylori gene, peptidylprolyl isomerase-FK506 binding protein (PPIase-FKBP), and showed that PPIase-FKBP was capable of inducing oncogenic transformation of gastric epithelial cells. But its mechanism was unclear. EXPERIMENTAL DESIGN We carried out a comparative proteomic analysis of human gastric epithelial cells that either express PPIase-FKBP or green fluorescent protein using 2-DE and then MALDI-TOF-MS/MS. RESULTS Our results identified 28 differentially expressed proteins induced by PPIase-FKBP. These proteins participate in some cellular biological processes, such as cell proliferation, cell apoptosis and DNA replication, mRNA splicing, and protein biosynthesis. Ingenuity Pathway Analysis categorized the 28 proteins into two molecular interaction networks, involved primarily in cancer and gastrointestinal diseases. CONCLUSIONS AND CLINICAL RELEVANCE Our results provided insight on the protein interaction networks and signaling pathways that may contribute to PPIase-FKBP-associated gastric diseases and may lead to a better understanding of the mechanisms indicating the oncogenic effects of H. pylori PPIase-FKBP.
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Affiliation(s)
- Yanmei Zhu
- Department of Pathology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, China.,Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, Key Laboratory of Cancer Etiology and Prevention, Liaoning Provincial Education Department, China Medical University, Shenyang, China.,West Virginia University Cancer Institute, West Virginia University, Morgantown, WV, USA
| | - Yuehua Gong
- Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, Key Laboratory of Cancer Etiology and Prevention, Liaoning Provincial Education Department, China Medical University, Shenyang, China
| | - Aodi Li
- Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, Key Laboratory of Cancer Etiology and Prevention, Liaoning Provincial Education Department, China Medical University, Shenyang, China
| | - Moye Chen
- Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, Key Laboratory of Cancer Etiology and Prevention, Liaoning Provincial Education Department, China Medical University, Shenyang, China
| | - Dan Kang
- Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, Key Laboratory of Cancer Etiology and Prevention, Liaoning Provincial Education Department, China Medical University, Shenyang, China
| | - Jun Liu
- West Virginia University Cancer Institute, West Virginia University, Morgantown, WV, USA
| | - Yuan Yuan
- Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, Key Laboratory of Cancer Etiology and Prevention, Liaoning Provincial Education Department, China Medical University, Shenyang, China
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Chatonnet F, Livera G, Fumel B, FouchÉCourt S, Flamant F. Direct and indirect consequences on gene expression of a thyroid hormone receptor alpha 1 mutation restricted to Sertoli cells. Mol Reprod Dev 2014; 81:1159-66. [PMID: 25487743 DOI: 10.1002/mrd.22437] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 10/22/2014] [Indexed: 01/29/2023]
Abstract
Thyroid hormone is required for the timely transition of Sertoli cells from proliferative to differentiating and maturing. This transition takes place during a critical developmental period in mammals, which in mice is the first post-natal week. In order to identify the underlying molecular mechanisms of this differentiation process, we used Cre/loxP technology to selectively block the function of the thyroid hormone receptor TRα1 in Sertoli cells. We then used RNA-seq to analyze the changes in gene expression induced in the post-natal testis. This differential analysis provides genetic clues to the initial testicular defects resulting from disrupted thyroid hormone signaling, and suggests that Sertoli cells influence germ cells soon after their birth.
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Affiliation(s)
- Fabrice Chatonnet
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Lyon 1, INRA, CNRS, Cedex, France
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