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Mehta D, Rajput K, Jain D, Bajaj A, Dasgupta U. Unveiling the Role of Mechanistic Target of Rapamycin Kinase (MTOR) Signaling in Cancer Progression and the Emergence of MTOR Inhibitors as Therapeutic Strategies. ACS Pharmacol Transl Sci 2024; 7:3758-3779. [PMID: 39698262 PMCID: PMC11650738 DOI: 10.1021/acsptsci.4c00530] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2024] [Revised: 11/08/2024] [Accepted: 11/18/2024] [Indexed: 12/20/2024]
Abstract
The mechanistic target of rapamycin kinase (MTOR) is pivotal for cell growth, metabolism, and survival. It functions through two distinct complexes, mechanistic TORC1 and mechanistic TORC2 (mTORC1 and mTORC2). These complexes function in the development and progression of cancer by regulating different cellular processes, such as protein synthesis, lipid metabolism, and glucose homeostasis. The mTORC1 complex senses nutrients and initiates proliferative signals, and mTORC2 is crucial for cell survival and cytoskeletal rearrangements. mTORC1 and mTORC2 have therefore emerged as potential targets for cancer treatment. Several mTOR inhibitors, including rapamycin and its analogs (rapalogs), primarily target mTORC1 and are effective for specific cancer types. However, these inhibitors often lead to resistance and limited long-term advantages due to the activation of survival pathways through feedback mechanisms. Researchers have created next-generation inhibitors targeting mTORC1 and mTORC2 and dual PI3K/mTOR inhibitors to address these difficulties. These inhibitors demonstrate enhanced anti-tumor effects by simultaneously disrupting multiple signaling pathways and show promise for improved and long-lasting therapies. However, development of resistance and adverse side effects remain a significant obstacle. Recent additions known as RapaLinks have emerged as a boon to counter drug-resistant cancer cells, as they are more potent and provide a more comprehensive blockade of mTOR signaling pathways. This Review combines current research findings and clinical insights to enhance our understanding of the crucial role of mTOR signaling in cancer biology and highlights the evolution of mTOR inhibitors as promising therapeutic approaches.
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Affiliation(s)
- Devashish Mehta
- Amity
Institute of Integrative Sciences and Health, Amity University Haryana, Panchgaon, Manesar, Gurgaon-122413, Haryana, India
| | - Kajal Rajput
- Amity
Institute of Integrative Sciences and Health, Amity University Haryana, Panchgaon, Manesar, Gurgaon-122413, Haryana, India
| | - Dolly Jain
- Laboratory
of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, NCR Biotech Science Cluster, 3rd Milestone Faridabad-Gurgaon
Expressway, Faridabad-121001, Haryana, India
| | - Avinash Bajaj
- Laboratory
of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, NCR Biotech Science Cluster, 3rd Milestone Faridabad-Gurgaon
Expressway, Faridabad-121001, Haryana, India
| | - Ujjaini Dasgupta
- Amity
Institute of Integrative Sciences and Health, Amity University Haryana, Panchgaon, Manesar, Gurgaon-122413, Haryana, India
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2
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Akbay B, Omarova Z, Trofimov A, Sailike B, Karapina O, Molnár F, Tokay T. Double-Edge Effects of Leucine on Cancer Cells. Biomolecules 2024; 14:1401. [PMID: 39595578 PMCID: PMC11591885 DOI: 10.3390/biom14111401] [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: 09/03/2024] [Revised: 10/16/2024] [Accepted: 10/22/2024] [Indexed: 11/28/2024] Open
Abstract
Leucine is an essential amino acid that cannot be produced endogenously in the human body and therefore needs to be obtained from dietary sources. Leucine plays a pivotal role in stimulating muscle protein synthesis, along with isoleucine and valine, as the group of branched-chain amino acids, making them one of the most popular dietary supplements for athletes and gym-goers. The individual effects of leucine, however, have not been fully clarified, as most of the studies so far have focused on the grouped effects of branched-chain amino acids. In recent years, leucine and its metabolites have been shown to stimulate muscle protein synthesis mainly via the mammalian target of the rapamycin complex 1 signaling pathway, thereby improving muscle atrophy in cancer cachexia. Interestingly, cancer research suggests that leucine may have either anti-cancer or pro-tumorigenic effects. In the current manuscript, we aim to review leucine's roles in muscle protein synthesis, tumor suppression, and tumor progression, specifically summarizing the molecular mechanisms of leucine's action. The role of leucine is controversial in hepatocellular carcinoma, whereas its pro-tumorigenic effects have been demonstrated in breast and pancreatic cancers. In summary, leucine being used as nutritional supplement for athletes needs more attention, as its pro-oncogenic effects may have been identified by recent studies. Anti-cancer or pro-tumorigenic effects of leucine in various cancers should be further investigated to achieve clear conclusions.
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Affiliation(s)
| | | | | | | | | | | | - Tursonjan Tokay
- Department of Biology, School of Sciences and Humanities, Nazarbayev University, Kabanbay Batyr 53, Astana 010000, Kazakhstan; (B.A.); (Z.O.); (A.T.); (B.S.); (O.K.); (F.M.)
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3
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Xu W, Hu M, Lu X, Lao Y, Ma N, Wang Y, Li J, Chen X, Liu S, Liu J, Zhu W, Yang H. Inhibition of PCSK9 enhances the anti-hepatocellular carcinoma effects of TCR-T cells and anti-PD-1 immunotherapy. Int J Biol Sci 2024; 20:3942-3955. [PMID: 39113701 PMCID: PMC11302870 DOI: 10.7150/ijbs.93668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Accepted: 07/06/2024] [Indexed: 08/10/2024] Open
Abstract
T cells play important roles in antitumor immunity. However, given that the hepatocellular carcinoma (HCC) tumor microenvironment confers resistance to T cell-based immunotherapies, novel strategies to boost T cell-mediated antitumor efficacy are urgently needed for the treatment of HCC. Here, we show that high proprotein convertase subtilisin/kexin type9 (PCSK9) expression was negatively associated with HCC patient's overall survival and markers of CD8+ T cells. Pharmacological inhibition of PCSK9 enhanced tumor-specific killing and downregulated PD-1 expression of AFP-specific TCR-T. Inhibition of PCSK9 significantly enhances the anti-HCC efficacy of TCR-T cells and anti-PD-1 immunotherapy in vivo. Moreover, PCSK9 inhibitor suppressed HCC growth dependent on CD8+ T cells. Mechanically, pharmacological inhibition of PCSK9 promoted low-density lipoprotein receptor (LDLR)-mediated activation of mTORC1 signaling in CD8+ T cells. LDLR deficiency was shown to impair cellular mTORC1 signaling and the anti-HCC function of CD8 T cells. On the basis of our findings in this study, we propose a potential metabolic intervention strategy that could be used to enhance the antitumor effects of immunotherapy for HCC.
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Affiliation(s)
- Weikang Xu
- Department of Gastroenterology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510220, China
| | - Minli Hu
- Department of Gastroenterology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510220, China
| | - Xinyu Lu
- Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, China; State Key Laboratory of Organ Failure Research; Key Laboratory of Infectious Diseases Research in South China, Ministry of Education; Guangdong Provincial Key Laboratory of Viral Hepatitis Research; Guangdong Provincial Clinical Research Center for Viral Hepatitis; Guangdong Institute of Hepatology. Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yueqiong Lao
- Department of Gastroenterology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510220, China
| | - Na Ma
- Department of Pathology, The First People's Hospital of Foshan, Foshan 528000, China
| | - Yiyue Wang
- Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, China; State Key Laboratory of Organ Failure Research; Key Laboratory of Infectious Diseases Research in South China, Ministry of Education; Guangdong Provincial Key Laboratory of Viral Hepatitis Research; Guangdong Provincial Clinical Research Center for Viral Hepatitis; Guangdong Institute of Hepatology. Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Jing Li
- Department of Gastroenterology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510220, China
| | - Xingyuan Chen
- Department of Gastroenterology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510220, China
| | - Shiming Liu
- Guangzhou Institute of Cardiovascular Disease, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510220, China
| | - Jing Liu
- Department of Hematology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510220, China
| | - Wei Zhu
- Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, China; State Key Laboratory of Organ Failure Research; Key Laboratory of Infectious Diseases Research in South China, Ministry of Education; Guangdong Provincial Key Laboratory of Viral Hepatitis Research; Guangdong Provincial Clinical Research Center for Viral Hepatitis; Guangdong Institute of Hepatology. Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Hui Yang
- Department of Gastroenterology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510220, China
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4
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Shi H, Chen S, Chi H. Immunometabolism of CD8 + T cell differentiation in cancer. Trends Cancer 2024; 10:610-626. [PMID: 38693002 PMCID: PMC11342304 DOI: 10.1016/j.trecan.2024.03.010] [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: 02/04/2024] [Revised: 03/19/2024] [Accepted: 03/21/2024] [Indexed: 05/03/2024]
Abstract
CD8+ cytotoxic T lymphocytes (CTLs) are central mediators of tumor immunity and immunotherapies. Upon tumor antigen recognition, CTLs differentiate from naive/memory-like toward terminally exhausted populations with more limited function against tumors. Such differentiation is regulated by both immune signals, including T cell receptors (TCRs), co-stimulation, and cytokines, and metabolism-associated processes. These immune signals shape the metabolic landscape via signaling, transcriptional and post-transcriptional mechanisms, while metabolic processes in turn exert spatiotemporal effects to modulate the strength and duration of immune signaling. Here, we review the bidirectional regulation between immune signals and metabolic processes, including nutrient uptake and intracellular metabolic pathways, in shaping CTL differentiation and exhaustion. We also discuss the mechanisms underlying how specific nutrient sources and metabolite-mediated signaling events orchestrate CTL biology. Understanding how metabolic programs and their interplay with immune signals instruct CTL differentiation and exhaustion is crucial to uncover tumor-immune interactions and design novel immunotherapies.
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Affiliation(s)
- Hao Shi
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Sidi Chen
- Department of Genetics, Yale University School of Medicine, New Haven, CT, USA; System Biology Institute, Integrated Science & Technology Center, West Haven, CT, USA.
| | - Hongbo Chi
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, USA.
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Kincheloe GN, Roberson PA, Jefferson LS, Kimball SR. Tissue-specific expression differences in Ras-related GTP-binding proteins in male rats. Physiol Rep 2024; 12:e15928. [PMID: 38296461 PMCID: PMC10830385 DOI: 10.14814/phy2.15928] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 12/30/2023] [Accepted: 01/14/2024] [Indexed: 02/05/2024] Open
Abstract
The protein kinase Mechanistic Target of Rapamycin (mTOR) in Complex 1 (mTORC1) is regulated in part by the Ras-related GTP-binding proteins (Rag GTPases). Rag GTPases form a heterodimeric complex consisting of either RagA or RagB associated with either RagC or RagD and act to localize mTORC1 to the lysosomal membrane. Until recently, RagA and RagB were thought to be functionally redundant, as were RagC and RagD. However, recent research suggests that the various isoforms differentially activate mTORC1. Here, the mRNA expression and protein abundance of the Rag GTPases was compared across male rat skeletal muscle, heart, liver, kidney, and brain. Whereas mRNA expression of RagA was higher than RagB in nearly all tissues studied, RagB protein abundance was higher than RagA in all tissues besides skeletal muscle. RagC mRNA expression was more abundant or equal to RagD mRNA, and RagD protein was more abundant than RagC protein in all tissues. Moreover, the proportion of RagB in the short isoform was greater than the long in liver, whereas the opposite was true in brain. These results serve to further elucidate Rag GTPase expression and offer potential explanations for the differential responses to amino acids that are observed in different tissues.
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Affiliation(s)
- Gregory N. Kincheloe
- Department of Cellular and Molecular PhysiologyPenn State College of MedicineHersheyPennsylvaniaUSA
- Present address:
Department of AnatomyUCSF College of MedicineSan FranciscoCaliforniaUSA
| | - Paul A. Roberson
- Department of Cellular and Molecular PhysiologyPenn State College of MedicineHersheyPennsylvaniaUSA
- Present address:
Division of Endocrinology, Metabolism, Diabetes, Department of MedicineUniversity of Colorado – Anschutz Medical CampusAuroraColoradoUSA
| | - Leonard S. Jefferson
- Department of Cellular and Molecular PhysiologyPenn State College of MedicineHersheyPennsylvaniaUSA
| | - Scot R. Kimball
- Department of Cellular and Molecular PhysiologyPenn State College of MedicineHersheyPennsylvaniaUSA
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6
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Long Y, Shi H, He Y, Qi X. Analyzing the impact of metabolism on immune cells in tumor microenvironment to promote the development of immunotherapy. Front Immunol 2024; 14:1307228. [PMID: 38264667 PMCID: PMC10804850 DOI: 10.3389/fimmu.2023.1307228] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 12/18/2023] [Indexed: 01/25/2024] Open
Abstract
Tumor metabolism and tumor immunity are inextricably linked. Targeting the metabolism of tumors is a point worth studying in tumor immunotherapy. Recently, the influence of the metabolism of tumors and immune cells on the occurrence, proliferation, metastasis, and prognosis of tumors has attracted more attention. Tumor tissue forms a specific tumor microenvironment (TME). In addition to tumor cells, there are also immune cells, stromal cells, and other cells in TME. To adapt to the environment, tumor cells go through the metabolism reprogramming of various substances. The metabolism reprogramming of tumor cells may further affect the formation of the tumor microenvironment and the function of a variety of cells, especially immune cells, eventually promoting tumor development. Therefore, it is necessary to study the metabolism of tumor cells and its effects on immune cells to guide tumor immunotherapy. Inhibiting tumor metabolism may restore immune balance and promote the immune response in tumors. This article will describe glucose metabolism, lipid metabolism, amino acid metabolism, and immune cells in tumors. Besides, the impact of metabolism on the immune cells in TME is also discussed for analyzing and exploring tumor immunotherapy.
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Affiliation(s)
| | | | | | - Xiaorong Qi
- Department of Gynecology and Obstetrics, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second Hospital, Sichuan University, Chengdu, China
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7
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Zhang X, Song W, Gao Y, Zhang Y, Zhao Y, Hao S, Ni T. The Role of Tumor Metabolic Reprogramming in Tumor Immunity. Int J Mol Sci 2023; 24:17422. [PMID: 38139250 PMCID: PMC10743965 DOI: 10.3390/ijms242417422] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/09/2023] [Accepted: 12/11/2023] [Indexed: 12/24/2023] Open
Abstract
The occurrence and development of tumors require the metabolic reprogramming of cancer cells, namely the alteration of flux in an autonomous manner via various metabolic pathways to meet increased bioenergetic and biosynthetic demands. Tumor cells consume large quantities of nutrients and produce related metabolites via their metabolism; this leads to the remodeling of the tumor microenvironment (TME) to better support tumor growth. During TME remodeling, the immune cell metabolism and antitumor immune activity are affected. This further leads to the escape of tumor cells from immune surveillance and therefore to abnormal proliferation. This review summarizes the regulatory functions associated with the abnormal biosynthesis and activity of metabolic signaling molecules during the process of tumor metabolic reprogramming. In addition, we provide a comprehensive description of the competition between immune cells and tumor cells for nutrients in the TME, as well as the metabolites required for tumor metabolism, the metabolic signaling pathways involved, and the functionality of the immune cells. Finally, we summarize current research targeted at the development of tumor immunotherapy. We aim to provide new concepts for future investigations of the mechanisms underlying the metabolic reprogramming of tumors and explore the association of these mechanisms with tumor immunity.
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Affiliation(s)
| | | | | | | | | | - Shuailin Hao
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Institutes of Biomedical Sciences, School of Life Sciences, Inner Mongolia University, Hohhot 010070, China; (X.Z.); (W.S.); (Y.G.); (Y.Z.); (Y.Z.)
| | - Ting Ni
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Institutes of Biomedical Sciences, School of Life Sciences, Inner Mongolia University, Hohhot 010070, China; (X.Z.); (W.S.); (Y.G.); (Y.Z.); (Y.Z.)
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Abstract
Significance: Immune cell therapy involves the administration of immune cells into patients, and it has emerged as one of the most common type of immunotherapy for cancer treatment. Knowledge on the biology and metabolism of the adoptively transferred immune cells and the metabolic requirements of different cell types in the tumor is fundamental for the development of immune cell therapy with higher efficacy. Recent Advances: Adoptive T cell therapy has been shown to be effective in limited types of cancer. Different types and generations of adoptive T cell therapies have evolved in the recent decade. This review covers the basic principles and development of these therapies in cancer treatment. Critical Issues: Our review provides an overview on the basic concepts on T cell metabolism and highlights the metabolic requirements of T and adoptively transferred T cells. Future Directions: Integrating the knowledge just cited will facilitate the development of strategies to maximize the expansion of adoptively transferred T cells ex vivo and in vivo and to promote their durability and antitumor effects. Antioxid. Redox Signal. 37, 1303-1324.
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Affiliation(s)
- Ge Hui Tan
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.,Department of Comprehensive Cancer Centre, School of Cancer and Pharmaceutical Sciences, King's College London, London, United Kingdom
| | - Carmen Chak-Lui Wong
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.,Center for Oncology and Immunology, Hong Kong Science Park, Hong Kong, SAR, China
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Sun N, Tian Y, Chen Y, Guo W, Li C. Metabolic rewiring directs melanoma immunology. Front Immunol 2022; 13:909580. [PMID: 36003368 PMCID: PMC9393691 DOI: 10.3389/fimmu.2022.909580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 07/13/2022] [Indexed: 11/22/2022] Open
Abstract
Melanoma results from the malignant transformation of melanocytes and accounts for the most lethal type of skin cancers. In the pathogenesis of melanoma, disordered metabolism is a hallmark characteristic with multiple metabolic paradigms involved in, e.g., glycolysis, lipid metabolism, amino acid metabolism, oxidative phosphorylation, and autophagy. Under the driving forces of oncogenic mutations, melanoma metabolism is rewired to provide not only building bricks for macromolecule synthesis and sufficient energy for rapid proliferation and metastasis but also various metabolic intermediates for signal pathway transduction. Of note, metabolic alterations in tumor orchestrate tumor immunology by affecting the functions of surrounding immune cells, thereby interfering with their antitumor capacity, in addition to the direct influence on tumor cell intrinsic biological activities. In this review, we first introduced the epidemiology, clinical characteristics, and treatment proceedings of melanoma. Then, the components of the tumor microenvironment, especially different populations of immune cells and their roles in antitumor immunity, were reviewed. Sequentially, how metabolic rewiring contributes to tumor cell malignant behaviors in melanoma pathogenesis was discussed. Following this, the proceedings of metabolism- and metabolic intermediate-regulated tumor immunology were comprehensively dissertated. Finally, we summarized currently available drugs that can be employed to target metabolism to intervene tumor immunology and modulate immunotherapy.
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Affiliation(s)
- Ningyue Sun
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi’an, China
- School of Basic Medical Sciences, Fourth Military Medical University, Xi’an, China
| | - Yangzi Tian
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Yuhan Chen
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi’an, China
- School of Basic Medical Sciences, Fourth Military Medical University, Xi’an, China
| | - Weinan Guo
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi’an, China
- *Correspondence: Chunying Li, ; Weinan Guo,
| | - Chunying Li
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi’an, China
- *Correspondence: Chunying Li, ; Weinan Guo,
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10
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Bensussen A, Santana MA, Rodríguez-Jorge O. Metabolic alterations impair differentiation and effector functions of CD8+ T cells. Front Immunol 2022; 13:945980. [PMID: 35983057 PMCID: PMC9380903 DOI: 10.3389/fimmu.2022.945980] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 07/11/2022] [Indexed: 11/21/2022] Open
Abstract
CD8+ T lymphocytes are one of the main effector cells of the immune system, they protect the organism against intracellular threats such as viruses and bacteria, as well as neoplasms. It is currently well established that CD8+ T cells have distinct immune responses, given by their phenotypes Tc1, Tc2, Tc17, and TcReg. The cellular plasticity of such phenotypes depends on the presence of different combinations of cytokines in the extracellular medium. It is known that metabolic imbalances play an important role in immune response, but the precise role of metabolic disturbances on the differentiation and function of CD8+ T cells, however, has not been explored. In this work, we used a computational model to explore the potential effect of metabolic alterations such as hyperglycemia, high alcohol consumption, dyslipidemia, and diabetes on CD8+ T cell differentiation. Our model predicts that metabolic alterations preclude the effector function of all CD8+ T cell phenotypes except for TcReg cells. It also suggests that such inhibition originates from the increase of reactive oxygen species in response to metabolic stressors. Finally, we simulated the outcome of treating metabolic-inhibited CD8+ T cells with drugs targeting key molecules such as mTORC1, mTORC2, Akt, and others. We found that overstimulation of mTORC2 may restore cell differentiation and functions of all effector phenotypes, even in diabetic patients. These findings highlight the importance of our predictive model to find potential targets to strengthen immunosuppressed patients in chronic diseases, like diabetes.
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Affiliation(s)
- Antonio Bensussen
- Laboratorio de Dinámica de Redes Genéticas, Centro de Investigación en Dinámica Celular, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico
| | - Maria Angelica Santana
- Laboratorio de Inmunología, Centro de Investigación en Dinámica Celular, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico
| | - Otoniel Rodríguez-Jorge
- Laboratorio de Inmunología, Centro de Investigación en Dinámica Celular, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico
- *Correspondence: Otoniel Rodríguez-Jorge,
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Chen W, Liu J, Zheng C, Bai Q, Gao Q, Zhang Y, Dong K, Lu T. Research Progress on Improving the Efficiency of CDT by Exacerbating Tumor Acidification. Int J Nanomedicine 2022; 17:2611-2628. [PMID: 35712639 PMCID: PMC9196673 DOI: 10.2147/ijn.s366187] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 05/16/2022] [Indexed: 12/21/2022] Open
Abstract
In recent years, chemodynamic therapy (CDT) has received extensive attention as a novel means of cancer treatment. The CDT agents can exert Fenton and Fenton-like reactions in the acidic tumor microenvironment (TME), converting hydrogen peroxide (H2O2) into highly toxic hydroxyl radicals (·OH). However, the pH of TME, as an essential factor in the Fenton reaction, does not catalyze the reaction effectively, hindering its efficiency, which poses a significant challenge for the future clinical application of CDT. Therefore, this paper reviews various strategies to enhance the antitumor properties of nanomaterials by modulating tumor acidity. Ultimately, the performance of CDT can be further improved by inducing strong oxidative stress to produce sufficient ·OH. In this paper, the various acidification pathways and proton pumps with potential acidification functions are mainly discussed, such as catalytic enzymes, exogenous acids, CAIX, MCT, NHE, NBCn1, etc. The problems, opportunities, and challenges of CDT in the cancer field are also discussed, thereby providing new insights for the design of nanomaterials and laying the foundation for their future clinical applications.
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Affiliation(s)
- Wenting Chen
- Key Laboratory for Space Biosciences and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Jinxi Liu
- Key Laboratory for Space Biosciences and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Caiyun Zheng
- Key Laboratory for Space Biosciences and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Que Bai
- Key Laboratory for Space Biosciences and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Qian Gao
- Key Laboratory for Space Biosciences and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Yanni Zhang
- Key Laboratory for Space Biosciences and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Kai Dong
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, 710072, People's Republic of China
| | - Tingli Lu
- Key Laboratory for Space Biosciences and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
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Chen S, Ning B, Song J, Yang Z, Zhou L, Chen Z, Mao L, Liu H, Wang Q, He S, Zhou Z. Enhanced pentose phosphate pathway activity promotes pancreatic ductal adenocarcinoma progression via activating YAP/MMP1 axis under chronic acidosis. Int J Biol Sci 2022; 18:2304-2316. [PMID: 35414794 PMCID: PMC8990471 DOI: 10.7150/ijbs.69526] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 02/24/2022] [Indexed: 11/16/2022] Open
Abstract
Background: Acidic microenvironment is a common physiological phenomenon in tumors, and is closely related to cancer development, but the effects of acidosis on pancreatic adenocarcinoma (PDAC) remains to be elucidated. Methods: Metabonomic assay and transcriptomic microarray were used to detect the changes of metabolites and gene expression profile respectively in acidosis-adapted PDAC cells. Wound healing, transwell and in vivo assay were applied to evaluate cell migration and invasion capacity. CCK8 and colony formation assays were performed to determine cell proliferation. Results: The acidosis-adapted PDAC cells had stronger metastasis and proliferation ability compared with the control cells. Metabonomic analysis showed that acidosis-adapted PDAC cells had both increased glucose and decreased glycolysis, implying a shift to pentose phosphate pathway. The metabolic shift further led to the inactivation of AMPK by elevating ATP. Transcriptomic analysis revealed that the differentially expressed genes in acidosis-adapted cells were enriched in extracellular matrix modification and Hippo signaling. Besides, MMP1 was the most upregulated gene in acidosis-adapted cells, mediated by the YAP/TAZ pathway, but could be reduced by AMPK activator. Conclusion: The present study showed that metabolic reprogramming promotes proliferation and metastasis of acidosis-adapted PDAC cells by inhibiting AMPK/Hippo signaling, thus upregulating MMP1.
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Affiliation(s)
- Siyuan Chen
- Department of Gastroenterology, the Second Affiliated Hospital of Chongqing Medical University, China
| | - Bo Ning
- Department of Gastroenterology, the Second Affiliated Hospital of Chongqing Medical University, China
| | - Jinwen Song
- Department of Infectious Diseases, the Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing, China
| | - Zihan Yang
- Department of Biomedical Science, City University of Hong Kong, Hong Kong SAR, China
| | - Li Zhou
- Department of Gastroenterology, the Second Affiliated Hospital of Chongqing Medical University, China
| | - Zhiji Chen
- Department of Gastroenterology, the Second Affiliated Hospital of Chongqing Medical University, China
| | - Linhong Mao
- Department of Gastroenterology, the Second Affiliated Hospital of Chongqing Medical University, China
| | - Hongtao Liu
- Department of Gastroenterology, the Second Affiliated Hospital of Chongqing Medical University, China
| | - Qingliang Wang
- Department of Pathology, the Second Affiliated Hospital of Chongqing Medical University, China
| | - Song He
- Department of Gastroenterology, the Second Affiliated Hospital of Chongqing Medical University, China
| | - Zhihang Zhou
- Department of Gastroenterology, the Second Affiliated Hospital of Chongqing Medical University, China
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13
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Xie S, Pan J, Xu J, Zhu W, Qin L. The critical function of metabolic reprogramming in cancer metastasis. AGING AND CANCER 2022; 3:20-43. [DOI: 10.1002/aac2.12044] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 12/31/2021] [Indexed: 01/03/2025]
Abstract
AbstractCancer metastasis is the leading cause of cancer‐related death. It is a complex, inefficient, and multistep process related to poor prognosis and high mortality of patients. Increasing evidence has shown that metabolic programming is a recognized hallmarker of cancer, plays a critical role in cancer metastasis. Metabolism alterations of glucose, lipid, and amino acid provide cancer cells with energy and substances for biosynthesis, maintain biofunctions and significantly affect proliferation, invasion, and metastasis of cancer cells. Tumor microenvironment (TME) is a complex system formed by varieties of cellular and noncellular elements. Nontumor cells in TME also undergo metabolic reprogramming or respond to metabolites to promote migration and invasion of cancer cells. A comprehensive understanding of the regulatory mechanism in metastasis from the metabolic reprogramming aspect is required to develop new therapeutic strategies combatting cancer metastasis. This review illustrates the metabolic reprogramming and interaction of cancer cells and nontumor cells in the TME, and the development of treatment strategies targeting metabolism alterations.
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Affiliation(s)
- Sun‐Zhe Xie
- Department of General Surgery Huashan Hospital, Fudan University Shanghai China
- Cancer Metastasis Institute Fudan University Shanghai China
| | - Jun‐Jie Pan
- Department of General Surgery Huashan Hospital, Fudan University Shanghai China
- Cancer Metastasis Institute Fudan University Shanghai China
| | - Jian‐Feng Xu
- Department of General Surgery Huashan Hospital, Fudan University Shanghai China
- Cancer Metastasis Institute Fudan University Shanghai China
| | - Wen‐wei Zhu
- Department of General Surgery Huashan Hospital, Fudan University Shanghai China
- Cancer Metastasis Institute Fudan University Shanghai China
| | - Lun‐Xiu Qin
- Department of General Surgery Huashan Hospital, Fudan University Shanghai China
- Cancer Metastasis Institute Fudan University Shanghai China
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14
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Mafi S, Mansoori B, Taeb S, Sadeghi H, Abbasi R, Cho WC, Rostamzadeh D. mTOR-Mediated Regulation of Immune Responses in Cancer and Tumor Microenvironment. Front Immunol 2022; 12:774103. [PMID: 35250965 PMCID: PMC8894239 DOI: 10.3389/fimmu.2021.774103] [Citation(s) in RCA: 96] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Accepted: 12/14/2021] [Indexed: 12/17/2022] Open
Abstract
The mechanistic/mammalian target of rapamycin (mTOR) is a downstream mediator in the phosphatidylinositol 3-kinase (PI3K)/Akt signaling pathways, which plays a pivotal role in regulating numerous cellular functions including cell growth, proliferation, survival, and metabolism by integrating a variety of extracellular and intracellular signals in the tumor microenvironment (TME). Dysregulation of the mTOR pathway is frequently reported in many types of human tumors, and targeting the PI3K/Akt/mTOR signaling pathway has been considered an attractive potential therapeutic target in cancer. The PI3K/Akt/mTOR signaling transduction pathway is important not only in the development and progression of cancers but also for its critical regulatory role in the tumor microenvironment. Immunologically, mTOR is emerging as a key regulator of immune responses. The mTOR signaling pathway plays an essential regulatory role in the differentiation and function of both innate and adaptive immune cells. Considering the central role of mTOR in metabolic and translational reprogramming, it can affect tumor-associated immune cells to undergo phenotypic and functional reprogramming in TME. The mTOR-mediated inflammatory response can also promote the recruitment of immune cells to TME, resulting in exerting the anti-tumor functions or promoting cancer cell growth, progression, and metastasis. Thus, deregulated mTOR signaling in cancer can modulate the TME, thereby affecting the tumor immune microenvironment. Here, we review the current knowledge regarding the crucial role of the PI3K/Akt/mTOR pathway in controlling and shaping the immune responses in TME.
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Affiliation(s)
- Sahar Mafi
- Department of Clinical Biochemistry, Yasuj University of Medical Sciences, Yasuj, Iran
- Medicinal Plants Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Behzad Mansoori
- The Wistar Institute, Molecular & Cellular Oncogenesis Program, Philadelphia, PA, United States
| | - Shahram Taeb
- Department of Radiology, School of Paramedical Sciences, Guilan University of Medical Sciences, Rasht, Iran
- Medical Biotechnology Research Center, School of Paramedical Sciences, Guilan University of Medical Sciences, Rasht, Iran
| | - Hossein Sadeghi
- Medicinal Plants Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Reza Abbasi
- Medicinal Plants Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
| | - William C. Cho
- Department of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong, Hong Kong SAR, China
| | - Davoud Rostamzadeh
- Department of Clinical Biochemistry, Yasuj University of Medical Sciences, Yasuj, Iran
- Medicinal Plants Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
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15
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Song S, Lou Y, Mao Y, Wen X, Fan M, He Z, Shen Y, Wen C, Shao T. Alteration of Gut Microbiome and Correlated Amino Acid Metabolism Contribute to Hyperuricemia and Th17-Driven Inflammation in Uox-KO Mice. Front Immunol 2022; 13:804306. [PMID: 35197978 PMCID: PMC8858814 DOI: 10.3389/fimmu.2022.804306] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 01/12/2022] [Indexed: 12/11/2022] Open
Abstract
Although gut dysbiosis had been demonstrated to be an important factor affecting hyperuricemia (HUA) and gout, little is known for its potential mechanistic connections. In this study, Uox-KO mice model that with spontaneously developed pronounced HUA and urate nephropathy was used to explore the pathophysiologic mechanism of microbiota alterations in HUA and gout with integrated multi-omics analysis. 16S rRNA gene sequencing was performed to characterize the characteristic bacteria, and untargeted LC/MS analysis was applied to reveal the featured metabolites. Our results showed there was a significant shift in gut microbiota composition and function in Uox-KO mice compared to WT mice and apparent metabolomics differences between the two groups. Among them, amino acids metabolism appears to play a critical role. Correlation analysis further revealed that the characteristic metabolites were strongly influenced by the discrepant bacterial genera. Furthermore, impairment of intestinal integrity and profound alterations in the profile of solute carrier family resulted in dysregulation of amino acids transportation, which subsequently impacted serum uric acid level and CD4+ Th17 driven inflammation. Together, these data indicate that gut dysbiosis promotes purine metabolism disorder and inflammation in Uox-KO mice. Remodeling the gut microbiota is a promising strategy to combat HUA and gout.
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Affiliation(s)
- Siyue Song
- College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yu Lou
- College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yingying Mao
- School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xianghui Wen
- College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Moqi Fan
- College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Zhixing He
- College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yang Shen
- The Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Chengping Wen
- College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
- *Correspondence: Chengping Wen, ; Tiejuan Shao,
| | - Tiejuan Shao
- College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
- *Correspondence: Chengping Wen, ; Tiejuan Shao,
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16
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Yuan Y, Zhang X, Chen R, Li Y, Wu B, Li R, Zou F, Ma X, Wang X, Chen Q, Deng J, Zhang Y, Chen T, Lin Y, Yan S, Zhang X, Li C, Bu X, Peng Y, Ke C, Deng K, Pan T, He X, Zhang Y, Zhang H. A bivalent nanoparticle vaccine exhibits potent cross-protection against the variants of SARS-CoV-2. Cell Rep 2022; 38:110256. [PMID: 34990583 PMCID: PMC8695190 DOI: 10.1016/j.celrep.2021.110256] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/26/2021] [Accepted: 12/21/2021] [Indexed: 12/28/2022] Open
Abstract
Inoculation against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is ongoing worldwide. However, the emergence of SARS-CoV-2 variants could cause immune evasion. We developed a bivalent nanoparticle vaccine that displays the receptor binding domains (RBDs) of the D614G and B.1.351 strains. With a prime-boost or a single-dose strategy, this vaccine elicits a robust neutralizing antibody and full protection against infection with the authentic D614G or B.1.351 strain in human angiotensin-converting enzyme 2 transgene mice. Interestingly, 8 months after inoculation with the D614G-specific vaccine, a new boost with this bivalent vaccine potently elicits cross-neutralizing antibodies for SARS-CoV-2 variants in rhesus macaques. We suggest that the D614G/B.1.351 bivalent vaccine could be used as an initial single dose or a sequential enforcement dose to prevent infection with SARS-CoV-2 and its variants.
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Affiliation(s)
- Yaochang Yuan
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Xiantao Zhang
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Ran Chen
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Yuzhuang Li
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Bolin Wu
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Rong Li
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Fan Zou
- Qianyang Biomedical Research Institute, Guangzhou, Guangdong 510063, China
| | - Xiancai Ma
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Xuemei Wang
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Qier Chen
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Jieyi Deng
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Yongli Zhang
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Tao Chen
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Yingtong Lin
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Shumei Yan
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China; Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong 510060, China
| | - Xu Zhang
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Congrong Li
- BSL-3 Laboratory, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Xiuqing Bu
- BSL-3 Laboratory, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Yi Peng
- BSL-3 Laboratory, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Changwen Ke
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, Guangdong 511430, China
| | - Kai Deng
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China; BSL-3 Laboratory, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China; Department of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Ting Pan
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Xin He
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Yiwen Zhang
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China.
| | - Hui Zhang
- Institute of Human Virology, Key Laboratory of Tropical Disease Control of the Ministry of Education, Guangdong Engineering Research Center for Antimicrobial Agents and Immunotechnology, Engineering Research Center of Gene Vaccine of the Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510080, China; National Guangzhou Laboratory, Bio-Island, Guangzhou, Guangdong 510320, China.
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17
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Amemiya Y, Nakamura N, Ikeda N, Sugiyama R, Ishii C, Maki M, Shibata H, Takahara T. Amino Acid-Mediated Intracellular Ca 2+ Rise Modulates mTORC1 by Regulating the TSC2-Rheb Axis through Ca 2+/Calmodulin. Int J Mol Sci 2021; 22:ijms22136897. [PMID: 34198993 PMCID: PMC8269083 DOI: 10.3390/ijms22136897] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 06/23/2021] [Indexed: 12/13/2022] Open
Abstract
Mechanistic target of rapamycin complex 1 (mTORC1) is a master growth regulator by controlling protein synthesis and autophagy in response to environmental cues. Amino acids, especially leucine and arginine, are known to be important activators of mTORC1 and to promote lysosomal translocation of mTORC1, where mTORC1 is thought to make contact with its activator Rheb GTPase. Although amino acids are believed to exclusively regulate lysosomal translocation of mTORC1 by Rag GTPases, how amino acids increase mTORC1 activity besides regulation of mTORC1 subcellular localization remains largely unclear. Here we report that amino acids also converge on regulation of the TSC2-Rheb GTPase axis via Ca2+/calmodulin (CaM). We showed that the amino acid-mediated increase of intracellular Ca2+ is important for mTORC1 activation and thereby contributes to the promotion of nascent protein synthesis. We found that Ca2+/CaM interacted with TSC2 at its GTPase activating protein (GAP) domain and that a CaM inhibitor reduced binding of CaM with TSC2. The inhibitory effect of a CaM inhibitor on mTORC1 activity was prevented by loss of TSC2 or by an active mutant of Rheb GTPase, suggesting that a CaM inhibitor acts through the TSC2-Rheb axis to inhibit mTORC1 activity. Taken together, in response to amino acids, Ca2+/CaM-mediated regulation of the TSC2-Rheb axis contributes to proper mTORC1 activation, in addition to the well-known lysosomal translocation of mTORC1 by Rag GTPases.
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