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Ji X, Wu Q, Cao X, Liu S, Zhang J, Chen S, Shan J, Zhang Y, Li B, Zhao H. Helicobacter pylori East Asian type CagA hijacks more SHIP2 by its EPIYA-D motif to potentiate the oncogenicity. Virulence 2024; 15:2375549. [PMID: 38982595 PMCID: PMC11238919 DOI: 10.1080/21505594.2024.2375549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2024] Open
Abstract
CagA is a significant oncogenic factor injected into host cells by Helicobacter pylori, which is divided into two subtypes: East Asian type (CagAE), characterized by the EPIYA-D motif, and western type (CagAW), harboring the EPIYA-C motif. CagAE has been reported to have higher carcinogenicity than CagAW, although the underlying reason is not fully understood. SHIP2 is an intracellular phosphatase that can be recruited by CagA to perturb the homeostasis of intracellular signaling pathways. In this study, we found that SHIP2 contributes to the higher oncogenicity of CagAE. Co-Immunoprecipitation and Pull-down assays showed that CagAE bind more SHIP2 than CagAW. Immunofluorescence staining showed that a higher amount of SHIP2 recruited by CagAE to the plasma membrane catalyzes the conversion of PI(3,4,5)P3 into PI(3,4)P2. This alteration causes higher activation of Akt signaling, which results in enhanced IL-8 secretion, migration, and invasion of the infected cells. SPR analysis showed that this stronger interaction between CagAE and SHIP2 stems from the higher affinity between the EPIYA-D motif of CagAE and the SH2 domain of SHIP2. Structural analysis revealed the crucial role of the Phe residue at the Y + 5 position in EPIYA-D. After mutating Phe of CagAE into Asp (the corresponding residue in the EPIYA-C motif) or Ala, the activation of downstream Akt signaling was reduced and the malignant transformation of infected cells was alleviated. These findings revealed that CagAE hijacks SHIP2 through its EPIYA-D motif to enhance its carcinogenicity, which provides a better understanding of the higher oncogenic risk of H. pylori CagAE.
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Affiliation(s)
- Xiaofei Ji
- School of Basic Medical Sciences, Binzhou Medical University, Yantai, Shandong, China
| | - Qianwen Wu
- The Second School of Clinical Medicine, Binzhou Medical University, Yantai, Shandong, China
| | - Xinying Cao
- School of Basic Medical Sciences, Binzhou Medical University, Yantai, Shandong, China
| | - Shuzhen Liu
- School of Basic Medical Sciences, Binzhou Medical University, Yantai, Shandong, China
| | - Jianhui Zhang
- School of Basic Medical Sciences, Binzhou Medical University, Yantai, Shandong, China
| | - Si Chen
- School of Basic Medical Sciences, Binzhou Medical University, Yantai, Shandong, China
| | - Jiangfan Shan
- School of Basic Medical Sciences, Binzhou Medical University, Yantai, Shandong, China
| | - Ying Zhang
- The Second School of Clinical Medicine, Binzhou Medical University, Yantai, Shandong, China
| | - Boqing Li
- School of Basic Medical Sciences, Binzhou Medical University, Yantai, Shandong, China
| | - Huilin Zhao
- School of Basic Medical Sciences, Binzhou Medical University, Yantai, Shandong, China
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Tan D, Miao D, Zhao C, Shi J, Lv Q, Lu F, Ruan H, Xiong Z, Zhang X. N6-methyladenosine-modified ALDH9A1 modulates lipid accumulation and tumor progression in clear cell renal cell carcinoma through the NPM1/IQGAP2/AKT signaling pathway. Cell Death Dis 2024; 15:520. [PMID: 39039052 PMCID: PMC11263707 DOI: 10.1038/s41419-024-06896-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 06/27/2024] [Accepted: 07/08/2024] [Indexed: 07/24/2024]
Abstract
Aldehyde dehydrogenases superfamily (ALDHs), which are ubiquitously present in various organisms with diverse subcellular localizations, play a crucial role in regulating malignant tumor progression; Nevertheless, their involvement in clear cell renal cell carcinoma (ccRCC) has not been elucidated. In this study, we performed comprehensive bioinformatics analyses on the 19 ALDHs genes, and identified ALDH9A1 as a key contributor in ccRCC. Expression patterns and clinical relevance of ALDH9A1 were determined using bioinformatics analyses, real-time PCR, western blotting, and immunohistochemistry. To explore the underlying mechanism behind the tumor suppressor role of ALDH9A1, RNA sequencing, methylated RNA immunoprecipitation, luciferase reporter assay, mass spectroscopy, immunoprecipitation, mutational studies and immunofluorescence were employed. The impact of ALDH9A1 in ccRCC progression and metabolic programming was assessed through both in vitro and in vivo. Here, this study revealed ALDH9A1 as a tumor suppressor gene in ccRCC. The fat mass and obesity associated protein (FTO) was identified as a demethylase for ALDH9A1 mRNA, resulting in its reduced stability and expression levels in ccRCC. Functional experiments demonstrated that the deficiency of ALDH9A1 in ccRCC promoted tumor proliferation, invasion, migration and lipid accumulation. Mechanistic insights illustrated that the diminished levels of ALDH9A1 resulted in the failure to sequester nucleophosmin 1 (NPM1) within cytoplasm, thereby suppressing the transcription of IQ motif containing the GTPase-activating protein 2 (IQGAP2), subsequently activating the AKT-mTOR signaling, ultimately fostering tumor progression and lipid accumulation. In conclusion, the present study highlights the robust prognostic significance of ALDH9A1 and delivers a comprehensive understanding of ALDH9A1-NPM1-IQGAP2-AKT axis in ccRCC. These findings established a solid research foundation for novel therapeutic strategies for ccRCC patients.
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Affiliation(s)
- Diaoyi Tan
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Institute of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Daojia Miao
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Institute of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Chuanyi Zhao
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Institute of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Jian Shi
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Institute of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Qingyang Lv
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Institute of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Feiyi Lu
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Institute of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Hailong Ruan
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
- Institute of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
| | - Zhiyong Xiong
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
- Institute of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
| | - Xiaoping Zhang
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
- Institute of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
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Katdare KA, Kjar A, O’Brown NM, Neal EH, Sorets AG, Shostak A, Romero-Fernandez W, Kwiatkowski AJ, Mlouk K, Kim H, Cowell RP, Schwensen KR, Horner KB, Wilson JT, Schrag MS, Megason SG, Lippmann ES. IQGAP2 regulates blood-brain barrier immune dynamics. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.02.07.527394. [PMID: 38645082 PMCID: PMC11030232 DOI: 10.1101/2023.02.07.527394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/23/2024]
Abstract
Brain endothelial cells (BECs) play an important role in maintaining central nervous system (CNS) homeostasis through blood-brain barrier (BBB) functions. BECs express low baseline levels of adhesion receptors, which limits entry of leukocytes. However, the molecular mediators governing this phenotype remain mostly unclear. Here, we explored how infiltration of immune cells across the BBB is influenced by the scaffold protein IQ motif containing GTPase activating protein 2 (IQGAP2). In mice and zebrafish, we demonstrate that loss of Iqgap2 increases infiltration of peripheral leukocytes into the CNS under homeostatic and inflammatory conditions. Using single-cell RNA sequencing and immunohistology, we further show that BECs from mice lacking Iqgap2 exhibit a profound inflammatory signature, including extensive upregulation of adhesion receptors and antigen-processing machinery. Human tissue analyses also reveal that Alzheimer's disease is associated with reduced hippocampal IQGAP2. Overall, our results implicate IQGAP2 as an essential regulator of BBB immune privilege and immune cell entry into the CNS.
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Affiliation(s)
- Ketaki A. Katdare
- Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN, USA
| | - Andrew Kjar
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | | | - Emma H. Neal
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA
| | - Alexander G. Sorets
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
| | - Alena Shostak
- Department of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
| | | | | | - Kate Mlouk
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA
| | - Hyosung Kim
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA
| | - Rebecca P. Cowell
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA
| | - Katrina R. Schwensen
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA
| | - Kensley B. Horner
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA
| | - John T. Wilson
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA
| | - Matthew S. Schrag
- Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN, USA
- Department of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
- Vanderbilt Memory and Alzheimer’s Center, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Sean G. Megason
- Department of Systems Biology, Harvard Medical School, Boston, MA, USA
| | - Ethan S. Lippmann
- Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN, USA
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, USA
- Department of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
- Vanderbilt Memory and Alzheimer’s Center, Vanderbilt University Medical Center, Nashville, TN, USA
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Xu L, Xiang W, Yang J, Gao J, Wang X, Meng L, Ye K, Zhao XH, Zhang XD, Jin L, Ye Y. PHB2 promotes SHIP2 ubiquitination via the E3 ligase NEDD4 to regulate AKT signaling in gastric cancer. J Exp Clin Cancer Res 2024; 43:17. [PMID: 38200519 PMCID: PMC10782615 DOI: 10.1186/s13046-023-02937-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024] Open
Abstract
BACKGROUND Prohibitin 2 (PHB2) exhibits opposite functions of promoting or inhibiting tumour across various cancer types. In this study, we aim to investigate its functions and underlying mechanisms in the context of gastric cancer (GC). METHODS PHB2 protein expression levels in GC and normal tissues were examined using western blot and immunohistochemistry. PHB2 expression level associations with patient outcomes were examined through Kaplan-Meier plotter analysis utilizing GEO datasets (GSE14210 and GSE29272). The biological role of PHB2 and its subsequent regulatory mechanisms were elucidated in vitro and in vivo. GC cell viability and proliferation were assessed using MTT cell viability analysis, clonogenic assays, and BrdU incorporation assays, while the growth of GC xenografted tumours was measured via IHC staining of Ki67. The interaction among PHB2 and SHIP2, as well as between SHIP2 and NEDD4, was identified through co-immunoprecipitation, GST pull-down assays, and deletion-mapping experiments. SHIP2 ubiquitination and degradation were assessed using cycloheximide treatment, plasmid transfection and co-immunoprecipitation, followed by western blot analysis. RESULTS Our analysis revealed a substantial increase in PHB2 expression in GC tissues compared to adjacent normal tissues. Notably, higher PHB2 levels correlated with poorer patient outcomes, suggesting its clinical relevance. Functionally, silencing PHB2 in GC cells significantly reduced cell proliferation and retarded GC tumour growth, whereas overexpression of PHB2 further enhanced GC cell proliferation. Mechanistically, PHB2 physically interacted with Src homology 2-containing inositol 5-phosphatase 2 (SHIP2) in the cytoplasm of GC cells, thus leading to SHIP2 degradation via its novel E3 ligase NEDD4. It subsequently activated the PI3K/Akt signaling pathway and thus promoted GC cell proliferation. CONCLUSIONS Our findings highlight the importance of PHB2 upregulation in driving GC progression and its association with adverse patient outcomes. Understanding the functional impact of PHB2 on GC growth contributes valuable insights into the molecular underpinnings of GC and may pave the way for the development of targeted therapies to improve patient outcomes.
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Affiliation(s)
- Liang Xu
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, Anhui, China
- School of Biomedical Sciences and Pharmacy, The University of Newcastle, Newcastle, NSW, 2308, Australia
| | - Wanying Xiang
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, Anhui, China
| | - Jiezhen Yang
- Department of Pathology, Zhongshan Hospital (Xiamen Branch), Fudan University, Xiamen, 361015, China
| | - Jing Gao
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, Anhui, China
| | - Xinyue Wang
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, Anhui, China
| | - Li Meng
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, Anhui, China
| | - Kaihong Ye
- Translational Research Institute, Henan Provincial and Zhengzhou City Key Laboratory of Non-Coding RNA and Cancer Metabolism, Henan International Join Laboratory of Non-Coding RNA and Metabolism in Cancer, Henan Provincial People's Hospital, Academy of Medical Sciences, Zhengzhou University, Zhengzhou, 450053, Henan, China
| | - Xiao Hong Zhao
- School of Biomedical Sciences and Pharmacy, The University of Newcastle, Newcastle, NSW, 2308, Australia
| | - Xu Dong Zhang
- School of Biomedical Sciences and Pharmacy, The University of Newcastle, Newcastle, NSW, 2308, Australia.
- Translational Research Institute, Henan Provincial and Zhengzhou City Key Laboratory of Non-Coding RNA and Cancer Metabolism, Henan International Join Laboratory of Non-Coding RNA and Metabolism in Cancer, Henan Provincial People's Hospital, Academy of Medical Sciences, Zhengzhou University, Zhengzhou, 450053, Henan, China.
| | - Lei Jin
- Translational Research Institute, Henan Provincial and Zhengzhou City Key Laboratory of Non-Coding RNA and Cancer Metabolism, Henan International Join Laboratory of Non-Coding RNA and Metabolism in Cancer, Henan Provincial People's Hospital, Academy of Medical Sciences, Zhengzhou University, Zhengzhou, 450053, Henan, China.
- School of Medicine and Public Health, The University of Newcastle, Newcastle, NSW, 2308, Australia.
| | - Yan Ye
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, Anhui, China.
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Jiang G, Shao J, Tang T, Wang M, Wang J, Jia X, Lai S. TMT-Based Proteomics Analysis Revealed the Protein Changes in Perirenal Fat from Obese Rabbits. Int J Mol Sci 2023; 24:17167. [PMID: 38138996 PMCID: PMC10743514 DOI: 10.3390/ijms242417167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 11/17/2023] [Accepted: 11/22/2023] [Indexed: 12/24/2023] Open
Abstract
Obesity has become increasingly prevalent in recent years, and there is a need for a deeper understanding of the complex pathogenesis underlying the obesity condition. Therefore, the objective of this study was to investigate how a high-fat diet (HFD) affects protein expression in a female-rabbit model compared to a standard normal-diet group (SND), to gain comprehensive insights into the molecular mechanisms involved in obesity. To achieve this objective, a tandem mass tag (TMT)-based quantitative proteomics analysis was conducted to examine the molecular changes occurring in the white adipose tissue (WAT) from the HFD and SND groups. The sequencing results identified a total of 4215 proteins, among which 151 proteins exhibited significant differential expression. Specifically, there were 85 upregulated proteins and 66 downregulated proteins in the HFD group compared to the SND group. Further analysis of these differentially expressed proteins (DEPs) revealed their involvement in crucial biological processes, including energy metabolism, hormonal regulation, and inflammatory response. In conclusion, this study sheds light on the impact of HFD on protein expression in a female-rabbit model, providing new insights into the molecular mechanisms underlying obesity and the associated metabolic disorders.
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Affiliation(s)
| | | | | | | | | | | | - Songjia Lai
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China; (G.J.); (J.S.); (T.T.); (M.W.); (J.W.); (X.J.)
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Lin KM, Weng LF, Chen SYJ, Lin SJ, Tsai CH. Upregulation of IQGAP2 by EBV transactivator Rta and its influence on EBV life cycle. J Virol 2023; 97:e0054023. [PMID: 37504571 PMCID: PMC10506479 DOI: 10.1128/jvi.00540-23] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Accepted: 06/09/2023] [Indexed: 07/29/2023] Open
Abstract
Epstein-Barr virus (EBV) is a human oncogenic γ-herpesvirus that establishes persistent infection in more than 90% of the world's population. EBV has two life cycles, latency and lytic replication. Reactivation of EBV from latency to the lytic cycle is initiated and controlled by two viral immediate-early transcription factors, Zta and Rta, encoded by BZLF1 and BRLF1, respectively. In this study, we found that IQGAP2 expression was elevated in EBV-infected B cells and identified Rta as a viral gene responsible for the IQGAP2 upregulation in both B cells and nasopharyngeal carcinoma cell lines. Mechanistically, we showed that Rta increases IQGAP2 expression through direct binding to the Rta-responsive element in the IQGAP2 promoter. We also demonstrated the direct interaction between Rta and IQGAP2 as well as their colocalization in the nucleus. Functionally, we showed that the induced IQGAP2 is required for the Rta-mediated Rta promoter activation in the EBV lytic cycle progression and may influence lymphoblastoid cell line clumping morphology through regulating E-cadherin expression. IMPORTANCE Elevated levels of antibodies against EBV lytic proteins and increased EBV DNA copy numbers in the sera have been reported in patients suffering from Burkitt's lymphoma, Hodgkin's lymphoma, and nasopharyngeal carcinoma, indicating that EBV lytic cycle progression may play an important role in the pathogenesis of EBV-associated diseases and highlighting the need for a more complete mechanistic understanding of the EBV lytic cycle. Rta acts as an essential transcriptional activator to induce lytic gene expression and thus trigger EBV reactivation. In this study, scaffolding protein IQGAP2 was found to be upregulated prominently following EBV infection via the direct binding of Rta to the RRE in the IQGAP2 promoter but not in response to other biological stimuli. Importantly, IQGAP2 was demonstrated to interact with Rta and promote the EBV lytic cycle progression. Suppression of IQGAP2 was also found to decrease E-cadherin expression and affect the clumping morphology of lymphoblastoid cell lines.
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Affiliation(s)
- Kai-Min Lin
- Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Li-Fang Weng
- Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan
- Department of Biochemical Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Shi-Yo Jill Chen
- Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Sue-Jane Lin
- Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Ching-Hwa Tsai
- Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan
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7
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Chen T, Fan X, Li G, Meng Y. Multi-omics data integration reveals the molecular network of dysregulation IQGAP2-mTOR promotes cell proliferation. Hum Cell 2023:10.1007/s13577-023-00912-8. [PMID: 37154877 DOI: 10.1007/s13577-023-00912-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 05/02/2023] [Indexed: 05/10/2023]
Abstract
IQGAP2 as a tumor suppressor gene can influence cell proliferation in multiple tumor cell lines. However, the regulation network of cell proliferation resulting solely from the deficiency of IQGAP2 in cells was still unclear. Here, we integrated transcriptome, proteome, and phosphoproteome analyses to investigate the regulatory network of cell proliferation in IQGAP2 knockdown HaCaT and HEK293 cells. Our findings revealed that the dysregulation of the IQGAP2-mTOR molecular network led to increased cell proliferation. We demonstrated that IQGAP2 knockdown enhanced the phosphorylation levels of AKT and S6K, leading to increased cell proliferation. Additionally, we found that AKT and mTOR inhibitors partially rescued abnormal cell proliferation by reducing hyperphosphorylation. Our data suggest a potential connection between the mTOR signaling pathway and aberrant cell proliferation in IQGAP2 knockdown cells. These findings offer a new therapeutic strategy for patients with IQGAP2 deficiency.
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Affiliation(s)
- Tao Chen
- Guangzhou KingMed Transformative Medicine Institute Co. Ltd., No. 10 Luoxuan 3Rd Road, Guangzhou International Biotech Island, Guangzhou, China
- Guangzhou KingMed Diagnostics Group Co. Ltd., Guangzhou, China
- KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
| | - Xijie Fan
- Guangzhou KingMed Transformative Medicine Institute Co. Ltd., No. 10 Luoxuan 3Rd Road, Guangzhou International Biotech Island, Guangzhou, China
- Guangzhou KingMed Diagnostics Group Co. Ltd., Guangzhou, China
| | - Guibin Li
- Guangzhou KingMed Transformative Medicine Institute Co. Ltd., No. 10 Luoxuan 3Rd Road, Guangzhou International Biotech Island, Guangzhou, China
- Guangzhou KingMed Diagnostics Group Co. Ltd., Guangzhou, China
| | - Yuhuan Meng
- Guangzhou KingMed Transformative Medicine Institute Co. Ltd., No. 10 Luoxuan 3Rd Road, Guangzhou International Biotech Island, Guangzhou, China.
- Guangzhou KingMed Diagnostics Group Co. Ltd., Guangzhou, China.
- KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China.
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8
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Song F, Dai Q, Grimm MO, Steinbach D. The Antithetic Roles of IQGAP2 and IQGAP3 in Cancers. Cancers (Basel) 2023; 15:cancers15041115. [PMID: 36831467 PMCID: PMC9953781 DOI: 10.3390/cancers15041115] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/02/2023] [Accepted: 02/08/2023] [Indexed: 02/12/2023] Open
Abstract
The scaffold protein family of IQ motif-containing GTPase-activating proteins (IQGAP1, 2, and 3) share a high degree of homology and comprise six functional domains. IQGAPs bind and regulate the cytoskeleton, interact with MAP kinases and calmodulin, and have GTPase-related activity, as well as a RasGAP domain. Thus, IQGAPs regulate multiple cellular processes and pathways, affecting cell division, growth, cell-cell interactions, migration, and invasion. In the past decade, significant evidence on the function of IQGAPs in signal transduction during carcinogenesis has emerged. Compared with IQGAP1, IQGAP2 and IQGAP3 were less analyzed. In this review, we summarize the different signaling pathways affected by IQGAP2 and IQGAP3, and the antithetic roles of IQGAP2 and IQGAP3 in different types of cancer. IQGAP2 expression is reduced and plays a tumor suppressor role in most solid cancer types, while IQGAP3 is overexpressed and acts as an oncogene. In lymphoma, for example, IQGAPs have partially opposite functions. There is considerable evidence that IQGAPs regulate a multitude of pathways to modulate cancer processes and chemoresistance, but some questions, such as how they trigger this signaling, through which domains, and why they play opposite roles on the same pathways, are still unanswered.
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Affiliation(s)
- Fei Song
- Department of Urology, Jena University Hospital, 07740 Jena, Germany
| | - Qingqing Dai
- Department of Internal Medicine IV (Gastroenterology, Hepatology, and Infectious Diseases), Jena University Hospital, 07740 Jena, Germany
| | - Marc-Oliver Grimm
- Department of Urology, Jena University Hospital, 07740 Jena, Germany
| | - Daniel Steinbach
- Department of Urology, Jena University Hospital, 07740 Jena, Germany
- Correspondence:
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9
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Ren L, Meng L, Gao J, Lu M, Guo C, Li Y, Rong Z, Ye Y. PHB2 promotes colorectal cancer cell proliferation and tumorigenesis through NDUFS1-mediated oxidative phosphorylation. Cell Death Dis 2023; 14:44. [PMID: 36658121 PMCID: PMC9852476 DOI: 10.1038/s41419-023-05575-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 01/03/2023] [Accepted: 01/09/2023] [Indexed: 01/21/2023]
Abstract
The alteration of cellular energy metabolism is a hallmark of colorectal cancer (CRC). Accumulating evidence has suggested oxidative phosphorylation (OXPHOS) is upregulated to meet the demand for energy in tumor initiation and development. However, the role of OXPHOS and its regulatory mechanism in CRC tumorigenesis and progression remain unclear. Here, we reveal that Prohibitin 2 (PHB2) expression is elevated in precancerous adenomas and CRC, which promotes cell proliferation and tumorigenesis of CRC. Additionally, knockdown of PHB2 significantly reduces mitochondrial OXPHOS levels in CRC cells. Meanwhile, NADH:ubiquinone oxidoreductase core subunit S1 (NDUFS1), as a PHB2 binding partner, is screened and identified by co-immunoprecipitation and mass spectrometry. Furthermore, PHB2 directly interacts with NDUFS1 and they co-localize in mitochondria, which facilitates NDUFS1 binding to NADH:ubiquinone oxidoreductase core subunit V1 (NDUFV1), regulating the activity of complex I. Consistently, partial inhibition of complex I activity also abrogates the increased cell proliferation induced by overexpression of PHB2 in normal human intestinal epithelial cells and CRC cells. Collectively, these results indicate that increased PHB2 directly interacts with NDUFS1 to stabilize mitochondrial complex I and enhance its activity, leading to upregulated OXPHOS levels, thereby promoting cell proliferation and tumorigenesis of CRC. Our findings provide a new perspective for understanding CRC energy metabolism, as well as novel intervention strategies for CRC therapeutics.
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Affiliation(s)
- Lin Ren
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
- Department of Blood Transfusion, The First Affiliated Hospital of Anhui Medical University, Hefei, China
- Department of Blood Transfusion, Anhui Public Health Clinical Center, Hefei, China
| | - Li Meng
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
| | - Jing Gao
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
| | - Mingdian Lu
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Chengyu Guo
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
| | - Yunyun Li
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
| | - Ziye Rong
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China.
| | - Yan Ye
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China.
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10
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Mohapatra T, Dixit M. IQ Motif Containing GTPase Activating Proteins (IQGAPs), A-Kinase Anchoring Proteins (AKAPs) and Kinase Suppressor of Ras Proteins (KSRs) in Scaffolding Oncogenic Pathways and Their Therapeutic Potential. ACS OMEGA 2022; 7:45837-45848. [PMID: 36570181 PMCID: PMC9773950 DOI: 10.1021/acsomega.2c05505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 11/18/2022] [Indexed: 06/17/2023]
Abstract
Scaffolding proteins colocalize interacting partners on their surface and facilitate complex formation. They have multiple domains and motifs, which provide binding sites for various molecules. This property of scaffolding proteins helps in the orderly transduction of signals. Abnormal signal transduction is frequently observed in cancers, which can also be attributed to the altered functionality of scaffolding proteins. IQ motif containing GTPase activating proteins (IQGAPs), kinase suppressor of Ras (KSR), and A-kinase anchoring proteins (AKAPs) tether oncogenic pathways RAS/RAF/MEK/ERK, PI3K/AKT, Hippo, Wnt, and CDC42/RAC to them. Scaffolding proteins are attractive drug targets as they are the controlling hub for multiple pathways and regulate crosstalk between them. The first part of this review describes the human scaffolding proteins known to play a role in oncogenesis, pathways altered by them, and the impact on oncogenic processes. The second part provides information on the therapeutic potential of scaffolding proteins and future possibilities. The information on the explored and unexplored areas of the therapeutic potential of scaffolding proteins will be equally helpful for biologists and chemists.
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Affiliation(s)
- Talina Mohapatra
- National
Institute of Science Education and Research, School of Biological Sciences, Bhubaneswar, Odisha 752050, India
- Homi
Bhabha National Institute, Training School
Complex, Anushaktinagar, Mumbai 400094, India
| | - Manjusha Dixit
- National
Institute of Science Education and Research, School of Biological Sciences, Bhubaneswar, Odisha 752050, India
- Homi
Bhabha National Institute, Training School
Complex, Anushaktinagar, Mumbai 400094, India
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11
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Song F, Kotolloshi R, Gajda M, Hölzer M, Grimm MO, Steinbach D. Reduced IQGAP2 Promotes Bladder Cancer through Regulation of MAPK/ERK Pathway and Cytokines. Int J Mol Sci 2022; 23:ijms232113508. [PMID: 36362301 PMCID: PMC9655856 DOI: 10.3390/ijms232113508] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/26/2022] [Accepted: 11/02/2022] [Indexed: 11/06/2022] Open
Abstract
The progression of non-muscle-invasive bladder cancer (NMIBC) to muscle-invasive bladder cancer (MIBC) is a major challenge in urologic oncology. However, understanding of the molecular processes remains limited. The dysregulation of IQGAP2 is becoming increasingly evident in most tumor entities, and it plays a role in multiple oncogenic pathways, so we evaluated the role of IQGAP2 in bladder cancer. IQGAP2 was downregulated in tumors compared with normal urothelium tissues and cells. IQGAP2 effectively attenuated bladder cancer cell growth independently from apoptosis. Reduced IQGAP2 promoted EMT in bladder cancer cells via activation of the MAPK/ERK pathway. In addition, IQGAP2 might influence key cellular processes, such as proliferation and metastasis, through the regulation of cytokines. In conclusion, we suggest that IQGAP2 plays a tumor-suppressing role in bladder cancer, possibly via inhibiting the MAPK/ERK pathway and reducing cytokines.
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Affiliation(s)
- Fei Song
- Department of Urology, Jena University Hospital, 07740 Jena, Germany
| | - Roland Kotolloshi
- Department of Urology, Jena University Hospital, 07740 Jena, Germany
| | - Mieczyslaw Gajda
- Section of Pathology, Department of Forensic Medicine, Jena University Hospital, 07747 Jena, Germany
| | - Martin Hölzer
- RNA Bioinformatics and High-Throughput Analysis, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Marc-Oliver Grimm
- Department of Urology, Jena University Hospital, 07740 Jena, Germany
| | - Daniel Steinbach
- Department of Urology, Jena University Hospital, 07740 Jena, Germany
- Correspondence:
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12
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Javaid S, Schaefer A, Goodwin CM, Nguyen VV, Massey FL, Pierobon M, Gambrell-Sanders D, Waters AM, Lambert KN, Diehl JN, Hobbs GA, Wood KC, Petricoin EF, Der CJ, Cox AD. Concurrent Inhibition of ERK and Farnesyltransferase Suppresses the Growth of HRAS Mutant Head and Neck Squamous Cell Carcinoma. Mol Cancer Ther 2022; 21:762-774. [PMID: 35247914 DOI: 10.1158/1535-7163.mct-21-0142] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 08/16/2021] [Accepted: 02/22/2022] [Indexed: 12/24/2022]
Abstract
Human papilloma virus (HPV)-negative head and neck squamous cell carcinoma (HNSCC) is a common cancer worldwide with an unmet need for more effective, less toxic treatments. Currently, both the disease and the treatment of HNSCC cause significant mortality and morbidity. Targeted therapies hold new promise for patients with HPV-negative status whose tumors harbor oncogenic HRAS mutations. Recent promising clinical results have renewed interest in the development of farnesyltransferase inhibitors (FTIs) as a therapeutic strategy for HRAS-mutant cancers. With the advent of clinical evaluation of the FTI tipifarnib for the treatment of HRAS-mutant HNSCC, we investigated the activity of tipifarnib and inhibitors of HRAS effector signaling in HRAS-mutant HNSCC cell lines. First, we validated that HRAS is a cancer driver in HRAS-mutant HNSCC lines. Second, we showed that treatment with the FTI tipifarnib largely phenocopied HRAS silencing, supporting HRAS as a key target of FTI antitumor activity. Third, we performed reverse-phase protein array analyses to profile FTI treatment-induced changes in global signaling, and conducted CRISPR/Cas9 genetic loss-of-function screens to identify previously unreported genes and pathways that modulate sensitivity to tipifarnib. Fourth, we determined that concurrent inhibition of HRAS effector signaling (ERK, PI3K, mTORC1) increased sensitivity to tipifarnib treatment, in part by overcoming tipifarnib-induced compensatory signaling. We also determined that ERK inhibition could block tipifarnib-induced epithelial-to-mesenchymal transition, providing a potential basis for the effectiveness of this combination. Our results support future investigations of these and other combination treatments for HRAS mutant HNSCC.
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Affiliation(s)
- Sehrish Javaid
- Program in Oral and Craniofacial Biomedicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Antje Schaefer
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Craig M Goodwin
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Victoria V Nguyen
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Frances L Massey
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Mariaelena Pierobon
- Center for Applied Proteomics and Molecular Medicine, Institute for Advanced Biomedical Research, George Mason University, Manassas, Virginia
| | | | - Andrew M Waters
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Kathryn N Lambert
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - J Nathaniel Diehl
- Curriculum in Genetics & Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - G Aaron Hobbs
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Kris C Wood
- Department of Pharmacology and Cancer Biology, Duke University, Durham, North Carolina
| | - Emanuel F Petricoin
- Center for Applied Proteomics and Molecular Medicine, Institute for Advanced Biomedical Research, George Mason University, Manassas, Virginia
| | - Channing J Der
- Program in Oral and Craniofacial Biomedicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Adrienne D Cox
- Program in Oral and Craniofacial Biomedicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Department of Radiation Oncology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
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13
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Ren Z, Wang X. LncRNA ATP2B1-AS1 modulates endothelial permeability via regulating miR-4729/IQGAP2 axis in diabetic retinopathy. J Diabetes Investig 2021; 13:443-452. [PMID: 34935307 PMCID: PMC8902403 DOI: 10.1111/jdi.13740] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 12/16/2021] [Accepted: 12/19/2021] [Indexed: 11/30/2022] Open
Abstract
Aims/Introduction Mounting evidence shows that long non‐coding RNAs (lncRNAs) are important to modulate the biological process of diabetic retinopathy (DR). We aimed to investigate the role of lncRNAs in DR and elucidate the exact mechanism. Materials and Methods Real‐time quantitative polymerase chain reaction was carried out to distinguish the lncRNA ATPase plasma membrane Ca2+ transporting 1 antisense RNA 1 (ATP2B1‐AS1) expression in DR patients and HG‐treated human retinal endothelial cells (HRECs). Dual‐luciferase reporter system was used to verify that ATP2B1‐AS1 could act as a microRNA (miR)‐4729 sponge, and miR‐4729 could bind to 3′UTR of IQ motif‐containing GTPase‐activating protein 2 (IQGAP2). Cell proliferation assay, wound healing migration assay, transwell assay, tube formation assay and immunofluorescence were used to investigate cell proliferation, migration and angiogenesis in HRECs. Results The present results showed that ATP2B1‐AS1 was downregulated in DR patients and high‐glucose‐induced HRECs. In gain‐ and loss‐of‐function assays, ATP2B1‐AS1 overexpression could significantly reduce cell proliferation, migration, angiogenesis and permeability induced by high glucose in vitro. Additionally, we carried out dual‐luciferase reporter experiments to determine that ATP2B1‐AS1 could act as a miR‐4729 sponge. ATP2B1‐AS1 overexpression could rescue miR‐4729 mimics and short hairpin RNA‐IQGAP2 induced cell proliferation, migration and angiogenesis in HRECs. Conclusions The present study showed that ATP2B1‐AS1 acted as a miR‐4729 sponge to regulate IQGAP2 reducing high‐glucose‐induced endothelial dysfunction in DR.
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Affiliation(s)
- Zengjin Ren
- Department of Ophthalmology, The First Affiliated Hospital of Kangda College of Nanjing Medical University, Xuzhou Medical University Affiliated Hospital of Lianyungang, The First People's Hospital of Lianyungang
| | - Xue Wang
- Department of Ophthalmology, The First Affiliated Hospital of Kangda College of Nanjing Medical University, Xuzhou Medical University Affiliated Hospital of Lianyungang, The First People's Hospital of Lianyungang
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14
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Kumar D, Patel SA, Khan R, Chawla S, Mohapatra N, Dixit M. IQ Motif-Containing GTPase-Activating Protein 2 Inhibits Breast Cancer Angiogenesis By Suppressing VEGFR2-AKT Signaling. Mol Cancer Res 2021; 20:77-91. [PMID: 34615693 DOI: 10.1158/1541-7786.mcr-20-1044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 06/17/2021] [Accepted: 10/01/2021] [Indexed: 12/24/2022]
Abstract
Antiangiogenesis cancer therapies are facing setbacks due to side effects and resistance. Parallel targeting of multiple pathways can help in the development of more effective therapies. This requires the discovery of new molecules that can regulate multiple cellular processes. Our study has recently established the association of reduced IQGAP2 expression in breast cancer with EMT and poor prognosis of the patient. Existing literature indirectly suggests the role of IQGAP2 in angiogenesis that is still unexplored. In this study, we searched the role of IQGAP2 in tumor angiogenesis in a comprehensive manner using cell culture, patients, and animal models. Depletion of IQGAP2 in breast cancer cells increased proliferation, migration, and tubulogenesis of HUVECs. Findings were validated in ex ovo CAM, Matrigel plug and skin wound-healing assays in mouse model, showing that the reduction of IQGAP2 significantly increased angiogenesis. As a confirmation, IHC analysis of the patient's tissues showed a negative correlation of IQGAP2 expression with the microvessel density. Mechanistically, loss of IQGAP2 appeared to activate VEGF-A via ERK activation in tumor cells, which activated the VEGFR2-AKT axis in HUVECs. IMPLICATIONS: The findings of this study suggest the antiangiogenic properties of IQGAP2 in breast cancer. The Dual effect of IQGAP2 on EMT and angiogenesis makes it a potential target for anticancer therapy.
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Affiliation(s)
- Dinesh Kumar
- School of Biological Sciences, National Institute of Science Education and Research, Bhubaneswar, HBNI, Khurda, Odisha, India
| | - Saket Awadhesbhai Patel
- School of Biological Sciences, National Institute of Science Education and Research, Bhubaneswar, HBNI, Khurda, Odisha, India
| | - Rehan Khan
- School of Biological Sciences, National Institute of Science Education and Research, Bhubaneswar, HBNI, Khurda, Odisha, India
| | - Saurabh Chawla
- School of Biological Sciences, National Institute of Science Education and Research, Bhubaneswar, HBNI, Khurda, Odisha, India
| | | | - Manjusha Dixit
- School of Biological Sciences, National Institute of Science Education and Research, Bhubaneswar, HBNI, Khurda, Odisha, India.
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15
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Wei T, Lambert PF. Role of IQGAP1 in Carcinogenesis. Cancers (Basel) 2021; 13:3940. [PMID: 34439095 PMCID: PMC8391515 DOI: 10.3390/cancers13163940] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 07/28/2021] [Accepted: 08/02/2021] [Indexed: 12/31/2022] Open
Abstract
Scaffolding proteins can play important roles in cell signaling transduction. IQ motif-containing GTPase-activating protein 1 (IQGAP1) influences many cellular activities by scaffolding multiple key signaling pathways, including ones involved in carcinogenesis. Two decades of studies provide evidence that IQGAP1 plays an essential role in promoting cancer development. IQGAP1 is overexpressed in many types of cancer, and its overexpression in cancer is associated with lower survival of the cancer patient. Here, we provide a comprehensive review of the literature regarding the oncogenic roles of IQGAP1. We start by describing the major cancer-related signaling pathways scaffolded by IQGAP1 and their associated cellular activities. We then describe clinical and molecular evidence for the contribution of IQGAP1 in different types of cancers. In the end, we review recent evidence implicating IQGAP1 in tumor-related immune responses. Given the critical role of IQGAP1 in carcinoma development, anti-tumor therapies targeting IQGAP1 or its associated signaling pathways could be beneficial for patients with many types of cancer.
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Affiliation(s)
| | - Paul F. Lambert
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53705, USA;
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16
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Wen S, Wei H, Liao Q, Li M, Zhong S, Cheng Y, Huang W, Wang D, Shu Y. Identification of Two Novel Candidate Genetic Variants Associated With the Responsiveness to Influenza Vaccination. Front Immunol 2021; 12:664024. [PMID: 34276655 PMCID: PMC8281270 DOI: 10.3389/fimmu.2021.664024] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Accepted: 06/08/2021] [Indexed: 11/13/2022] Open
Abstract
Background Annual vaccination is the most effective prevention of influenza infection. Up to now, a series of studies have demonstrated the role of genetic variants in regulating the antibody response to influenza vaccine. However, among the Chinese population, the relationship between genetic factors and the responsiveness to influenza vaccination has not been clarified through genome-wide association study (GWAS). Method A total of 1,968 healthy volunteers of Chinese descent were recruited and 1,582 of them were available for the subsequent two-stage analysis. In the discovery stage, according to our inclusion criteria, 123 of 1,582 subjects were selected as group 1 and received whole-genome sequencing to identify potential variants and genes. In the verification stage, 29 candidate variants identified by GWAS were selected for further validation in 481 subjects in group 2. Besides, we also analyzed nine variants from previously published reports in our study. Results Multivariate logistic regression analysis showed that compared with the TT genotype of ZBTB46 rs2281929, the TC + CC genotype was associated with a lower risk of low responsiveness to influenza vaccination adjusted for gender and age (Group 2: P = 7.75E-05, OR = 0.466, 95%CI = 0.319–0.680; Combined group: P = 1.18E-06, OR = 0.423, 95%CI = 0.299–0.599). In the combined group, IQGAP2 rs2455230 GC + CC genotype was correlated with a lower risk of low responsiveness to influenza vaccination compared with the GG genotype (P = 8.90E-04, OR = 0.535, 95%CI = 0.370–0.774), but the difference was not statistically significant in group 2 (P = 0.008). The antibody fold rises of subjects with ZBTB46 rs2281929 TT genotype against H1N1, H3N2,and B were all significantly lower than that of subjects with TC + CC genotype (P < 0.001). Compared with IQGAP2 rs2455230 GC + CC carriers, GG carriers had lower antibody fold rises to H1N1 (P = 0.001) and B (P = 0.032). The GG genotype of rs2455230 tended to be correlated with lower antibody fold rises (P = 0.096) against H3N2, but the difference was not statistically significant. No correlation was found between nine SNPs from previously published reports and the serological response to influenza vaccine in our study. Conclusion Our study identified two novel candidate missense variants, ZBTB46 rs2281929 and IQGAP2 rs2455230, were associated with the immune response to influenza vaccination among the Chinese population. Identifying these variants will provide more evidence for future research and improve the individualized influenza vaccination program.
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Affiliation(s)
- Simin Wen
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China
| | - Hejiang Wei
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Prevention and Control, Beijing, China
| | - Qijun Liao
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China
| | - Mao Li
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China
| | - Shuyi Zhong
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China
| | - Yanhui Cheng
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Prevention and Control, Beijing, China
| | - Weijuan Huang
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Prevention and Control, Beijing, China
| | - Dayan Wang
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Prevention and Control, Beijing, China
| | - Yuelong Shu
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China
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17
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Wang D, Wang Z, Zhang L, Sun S. LncRNA PDCD4-AS1 alleviates triple negative breast cancer by increasing expression of IQGAP2 via miR-10b-5p. Transl Oncol 2020; 14:100958. [PMID: 33248413 PMCID: PMC7704410 DOI: 10.1016/j.tranon.2020.100958] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 10/23/2020] [Accepted: 11/13/2020] [Indexed: 01/04/2023] Open
Abstract
Down-regulated expressions of PDCD4-AS1 and IQGAP2were observed in TNBC. Over-expressed miR-10b-5p was detected in TNBC. PDCD4-AS1/IQGAP2 inhibits proliferation, migration and invasion of TNBC cells. miR-10b-5p increases proliferation, migration and invasion of TNBC cells. PDCD4-AS1 inhibits TNBC via acting as a ceRNA for miR-10b-5p.
Objective Mounting evidence demonstrates that long non-coding RNA (lncRNA) is dysregulated in breast cancers. This study was designed to detect the influences and regulatory mechanism of lncRNA PDCD4-AS1 in triple-negative breast cancer (TNBC). Methods qRT-PCR and Western blot were utilized to investigate the expression levels of PDCD4-AS1, miR-10b-5p and IQGAP2 in TNBC tissues and cells. Online software and luciferase reporter gene system were employed to testify the interactions among these molecules. Loss and gain of function of PDCD4-AS1, miR-10b-5p or IQGAP2 were performed before MTT and colony formation assay, TUNEL staining in addition to Transwell and scratch assays were applied to measure the cell biological functions. Results In this work, PDCD4-AS1 and IQGAP2 were lowly expressed while miR-10b-5p was strongly expressed in TNBC tissues and cells. PDCD4-AS1 or IQGAP2 overexpression effectively attenuated TNBC cell proliferation, migration and invasion, and increased the apoptosis rate, while this effect was abandoned in response to miR-10b-5p mimics transfection. miR-10b-5p bound to IQGAP2 and acted as a downstream target of PDCD4-AS1. Conclusion Our findings identified lncRNA PDCD4-AS1 as a tumor suppressor in TNBC by regulating IQGAP2 expression via miR-10b-5p, giving a novel insight into the regulatory mechanism of PDCD4-AS1 in the pathogenesis of TNBC.
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Affiliation(s)
- Daoliang Wang
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, No. 238 of Jiefang Road, No. 99 of Zhangzhidong Road, Wuchang District, Wuhan, Hubei 430060, PR China
| | - Zhuo Wang
- Department of Breast Surgery, the First People's Hospital of Jingzhou City, Jingzhou, Hubei 434000, PR China
| | - Lijun Zhang
- Department of Breast Surgery, the First People's Hospital of Jingzhou City, Jingzhou, Hubei 434000, PR China
| | - Shengrong Sun
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, No. 238 of Jiefang Road, No. 99 of Zhangzhidong Road, Wuchang District, Wuhan, Hubei 430060, PR China.
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