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Li W, Cai Z, Schindler F, Afjehi-Sadat L, Montsch B, Heffeter P, Heiss EH, Weckwerth W. Elevated PINK1/Parkin-Dependent Mitophagy and Boosted Mitochondrial Function Mediate Protection of HepG2 Cells from Excess Palmitic Acid by Hesperetin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:13039-13053. [PMID: 38809522 PMCID: PMC11181321 DOI: 10.1021/acs.jafc.3c09132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 05/01/2024] [Accepted: 05/07/2024] [Indexed: 05/30/2024]
Abstract
Deregulation of mitochondrial functions in hepatocytes contributes to many liver diseases, such as nonalcoholic fatty liver disease (NAFLD). Lately, it was referred to as MAFLD (metabolism-associated fatty liver disease). Hesperetin (Hst), a bioactive flavonoid constituent of citrus fruit, has been proven to attenuate NAFLD. However, a potential connection between its preventive activities and the modulation of mitochondrial functions remains unclear. Here, our results showed that Hst alleviates palmitic acid (PA)-triggered NLRP3 inflammasome activation and cell death by inhibition of mitochondrial impairment in HepG2 cells. Hst reinstates fatty acid oxidation (FAO) rates measured by seahorse extracellular flux analyzer and intracellular acetyl-CoA levels as well as intracellular tricarboxylic acid cycle metabolites levels including NADH and FADH2 reduced by PA exposure. In addition, Hst protects HepG2 cells against PA-induced abnormal energetic profile, ATP generation reduction, overproduction of mitochondrial reactive oxygen species, and collapsed mitochondrial membrane potential. Furthermore, Hst improves the protein expression involved in PINK1/Parkin-mediated mitophagy. Our results demonstrate that it restores PA-impaired mitochondrial function and sustains cellular homeostasis due to the elevation of PINK1/Parkin-mediated mitophagy and the subsequent disposal of dysfunctional mitochondria. These results provide therapeutic potential for Hst utilization as an effective intervention against fatty liver disease.
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Affiliation(s)
- Wan Li
- Molecular
Systems Biology (MOSYS), Department of Functional and Evolutionary
Ecology, University of Vienna, Vienna 1030, Austria
- Vienna
Doctoral School of Ecology and Evolution, University of Vienna, Vienna 1030, Austria
| | - Zhengnan Cai
- Molecular
Systems Biology (MOSYS), Department of Functional and Evolutionary
Ecology, University of Vienna, Vienna 1030, Austria
- Vienna
Doctoral School of Ecology and Evolution, University of Vienna, Vienna 1030, Austria
| | - Florian Schindler
- Molecular
Systems Biology (MOSYS), Department of Functional and Evolutionary
Ecology, University of Vienna, Vienna 1030, Austria
- Vienna
Doctoral School of Pharmaceutical, Nutritional and Sports Sciences, University of Vienna, Vienna 1090, Austria
| | - Leila Afjehi-Sadat
- Mass
Spectrometry (Core) Facility, University
of Vienna, Vienna 1030, Austria
- Research
Support Facilities UBB, University of Vienna, Vienna 1030, Austria
| | - Bianca Montsch
- Center for
Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, Vienna 1090, Austria
- Department
of Food Chemistry and Toxicology, University
of Vienna, Vienna 1090, Austria
| | - Petra Heffeter
- Center for
Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, Vienna 1090, Austria
| | - Elke H. Heiss
- Department
of Pharmaceutical Sciences, University of
Vienna, Vienna 1090, Austria
| | - Wolfram Weckwerth
- Molecular
Systems Biology (MOSYS), Department of Functional and Evolutionary
Ecology, University of Vienna, Vienna 1030, Austria
- Vienna
Metabolomics Center (VIME), University of
Vienna, Vienna 1030, Austria
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2
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Cai Z, Li W, Hager S, Wilson JL, Afjehi-Sadat L, Heiss EH, Weichhart T, Heffeter P, Weckwerth W. Targeting PHGDH reverses the immunosuppressive phenotype of tumor-associated macrophages through α-ketoglutarate and mTORC1 signaling. Cell Mol Immunol 2024; 21:448-465. [PMID: 38409249 PMCID: PMC11061172 DOI: 10.1038/s41423-024-01134-0] [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: 07/18/2023] [Accepted: 01/04/2024] [Indexed: 02/28/2024] Open
Abstract
Phosphoglycerate dehydrogenase (PHGDH) has emerged as a crucial factor in macromolecule synthesis, neutralizing oxidative stress, and regulating methylation reactions in cancer cells, lymphocytes, and endothelial cells. However, the role of PHGDH in tumor-associated macrophages (TAMs) is poorly understood. Here, we found that the T helper 2 (Th2) cytokine interleukin-4 and tumor-conditioned media upregulate the expression of PHGDH in macrophages and promote immunosuppressive M2 macrophage activation and proliferation. Loss of PHGDH disrupts cellular metabolism and mitochondrial respiration, which are essential for immunosuppressive macrophages. Mechanistically, PHGDH-mediated serine biosynthesis promotes α-ketoglutarate production, which activates mTORC1 signaling and contributes to the maintenance of an M2-like macrophage phenotype in the tumor microenvironment. Genetic ablation of PHGDH in macrophages from tumor-bearing mice results in attenuated tumor growth, reduced TAM infiltration, a phenotypic shift of M2-like TAMs toward an M1-like phenotype, downregulated PD-L1 expression and enhanced antitumor T-cell immunity. Our study provides a strong basis for further exploration of PHGDH as a potential target to counteract TAM-mediated immunosuppression and hinder tumor progression.
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Affiliation(s)
- Zhengnan Cai
- Molecular Systems Biology (MOSYS), Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria
- Vienna Doctoral School of Ecology and Evolution, University of Vienna, Vienna, Austria
| | - Wan Li
- Molecular Systems Biology (MOSYS), Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria
- Vienna Doctoral School of Ecology and Evolution, University of Vienna, Vienna, Austria
| | - Sonja Hager
- Center for Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Jayne Louise Wilson
- Center for Pathobiochemistry and Genetics, Institute of Medical Genetics, Medical University of Vienna, Vienna, Austria
| | - Leila Afjehi-Sadat
- Research Support Facility, Mass Spectrometry Unit, Faculty of Life Science, University of Vienna, Vienna, Austria
| | - Elke H Heiss
- Department of Pharmaceutical Sciences, University of Vienna, Vienna, Austria
| | - Thomas Weichhart
- Center for Pathobiochemistry and Genetics, Institute of Medical Genetics, Medical University of Vienna, Vienna, Austria
| | - Petra Heffeter
- Center for Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Wolfram Weckwerth
- Molecular Systems Biology (MOSYS), Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria.
- Vienna Metabolomics Center (VIME), University of Vienna, Vienna, Austria.
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3
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Qian Y, Yin Y, Zheng X, Liu Z, Wang X. Metabolic regulation of tumor-associated macrophage heterogeneity: insights into the tumor microenvironment and immunotherapeutic opportunities. Biomark Res 2024; 12:1. [PMID: 38185636 PMCID: PMC10773124 DOI: 10.1186/s40364-023-00549-7] [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: 10/01/2023] [Accepted: 12/12/2023] [Indexed: 01/09/2024] Open
Abstract
Tumor-associated macrophages (TAMs) are a heterogeneous population that play diverse functions in tumors. Their identity is determined not only by intrinsic factors, such as origins and transcription factors, but also by external signals from the tumor microenvironment (TME), such as inflammatory signals and metabolic reprogramming. Metabolic reprogramming has rendered TAM to exhibit a spectrum of activities ranging from pro-tumorigenic to anti-tumorigenic, closely associated with tumor progression and clinical prognosis. This review implicates the diversity of TAM phenotypes and functions, how this heterogeneity has been re-evaluated with the advent of single-cell technologies, and the impact of TME metabolic reprogramming on TAMs. We also review current therapies targeting TAM metabolism and offer new insights for TAM-dependent anti-tumor immunotherapy by focusing on the critical role of different metabolic programs in TAMs.
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Affiliation(s)
- Yujing Qian
- Department of Obstetrics and Gynecology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Yujia Yin
- Department of Obstetrics and Gynecology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Xiaocui Zheng
- Department of Obstetrics and Gynecology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Zhaoyuan Liu
- Department of Immunology and Microbiology, Shanghai Institute of Immunology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Xipeng Wang
- Department of Obstetrics and Gynecology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China.
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4
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de Ruiter Swain J, Michalopoulou E, Noch EK, Lukey MJ, Van Aelst L. Metabolic partitioning in the brain and its hijacking by glioblastoma. Genes Dev 2023; 37:681-702. [PMID: 37648371 PMCID: PMC10546978 DOI: 10.1101/gad.350693.123] [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] [Indexed: 09/01/2023]
Abstract
The different cell types in the brain have highly specialized roles with unique metabolic requirements. Normal brain function requires the coordinated partitioning of metabolic pathways between these cells, such as in the neuron-astrocyte glutamate-glutamine cycle. An emerging theme in glioblastoma (GBM) biology is that malignant cells integrate into or "hijack" brain metabolism, co-opting neurons and glia for the supply of nutrients and recycling of waste products. Moreover, GBM cells communicate via signaling metabolites in the tumor microenvironment to promote tumor growth and induce immune suppression. Recent findings in this field point toward new therapeutic strategies to target the metabolic exchange processes that fuel tumorigenesis and suppress the anticancer immune response in GBM. Here, we provide an overview of the intercellular division of metabolic labor that occurs in both the normal brain and the GBM tumor microenvironment and then discuss the implications of these interactions for GBM therapy.
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Affiliation(s)
- Jed de Ruiter Swain
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA
- Cold Spring Harbor Laboratory School of Biological Sciences, Cold Spring Harbor, New York 11724, USA
| | | | - Evan K Noch
- Department of Neurology, Division of Neuro-oncology, Weill Cornell Medicine, New York, New York 10021, USA
| | - Michael J Lukey
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA;
| | - Linda Van Aelst
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA;
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5
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Shao Y, Wang Y, Su R, Pu W, Chen S, Fu L, Yu H, Qiu Y. Dual identity of tumor-associated macrophage in regulated cell death and oncotherapy. Heliyon 2023; 9:e17582. [PMID: 37449180 PMCID: PMC10336529 DOI: 10.1016/j.heliyon.2023.e17582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 04/25/2023] [Accepted: 05/31/2023] [Indexed: 07/18/2023] Open
Abstract
Tumor-associated macrophage (TAM) affects the intrinsic properties of tumor cells and the tumor microenvironment (TME), which can stimulate tumor cell proliferation, migration, and genetic instability, and macrophage diversity includes the diversity of tumors with different functional characteristics. Macrophages are now a central drug target in various diseases, especially in the TME, which, as "tumor promoters" and "immunosuppressors", have different responsibilities during tumor development and accompany by significant dynamic alterations in various subpopulations. Remodelling immunosuppression of TME and promotion of pre-existing antitumor immune responses is critical by altering TAM polarization, which is relevant to the efficacy of immunotherapy, and uncovering the exact mechanism of action of TAMs and identifying their specific targets is vital to optimizing current immunotherapies. Hence, this review aims to reveal the triadic interactions of macrophages with programmed death and oncotherapy, and to integrate certain relationships in cancer treatment.
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Affiliation(s)
- Yingying Shao
- Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Ministry of Education, State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- Haihe Laboratory of Modern Chinese Medicine, Tianjin, China
| | - Yu Wang
- Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Ministry of Education, State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- Haihe Laboratory of Modern Chinese Medicine, Tianjin, China
| | - Ranran Su
- Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Ministry of Education, State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- Haihe Laboratory of Modern Chinese Medicine, Tianjin, China
| | - Weiling Pu
- Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Ministry of Education, State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- Haihe Laboratory of Modern Chinese Medicine, Tianjin, China
| | - Sibao Chen
- State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation), Shenzhen, China
- Department of Applied Biology and Chemical Technology, Research Center for Chinese Medicine Innovation, The Hong Kong Polytechnic University, Hong Kong, China
| | - Leilei Fu
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, China
| | - Haiyang Yu
- Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Ministry of Education, State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- Haihe Laboratory of Modern Chinese Medicine, Tianjin, China
| | - Yuling Qiu
- School of Pharmacy, Tianjin Medical University, Tianjin, China
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6
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Li W, Cai Z, Schindler F, Bahiraii S, Brenner M, Heiss EH, Weckwerth W. Norbergenin prevents LPS-induced inflammatory responses in macrophages through inhibiting NFκB, MAPK and STAT3 activation and blocking metabolic reprogramming. Front Immunol 2023; 14:1117638. [PMID: 37251401 PMCID: PMC10213229 DOI: 10.3389/fimmu.2023.1117638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 03/28/2023] [Indexed: 05/31/2023] Open
Abstract
Inflammation is thought to be a key cause of many chronic diseases and cancer. However, current therapeutic agents to control inflammation have limited long-term use potential due to various side-effects. This study aimed to examine the preventive effects of norbergenin, a constituent of traditional anti-inflammatory recipes, on LPS-induced proinflammatory signaling in macrophages and elucidate the underlying mechanisms by integrative metabolomics and shotgun label-free quantitative proteomics platforms. Using high-resolution mass spectrometry, we identified and quantified nearly 3000 proteins across all samples in each dataset. To interpret these datasets, we exploited the differentially expressed proteins and conducted statistical analyses. Accordingly, we found that LPS-induced production of NO, IL1β, TNFα, IL6 and iNOS in macrophages was alleviated by norbergenin via suppressed activation of TLR2 mediated NFκB, MAPKs and STAT3 signaling pathways. In addition, norbergenin was capable of overcoming LPS-triggered metabolic reprogramming in macrophages and restrained the facilitated glycolysis, promoted OXPHOS, and restored the aberrant metabolites within the TCA cycle. This is linked to its modulation of metabolic enzymes to support its anti-inflammatory activity. Thus, our results uncover that norbergenin regulates inflammatory signaling cascades and metabolic reprogramming in LPS stimulated macrophages to exert its anti-inflammatory potential.
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Affiliation(s)
- Wan Li
- Molecular Systems Biology (MOSYS), Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria
- Vienna Doctoral School of Ecology and Evolution, University of Vienna, Vienna, Austria
| | - Zhengnan Cai
- Molecular Systems Biology (MOSYS), Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria
- Vienna Doctoral School of Ecology and Evolution, University of Vienna, Vienna, Austria
| | - Florian Schindler
- Molecular Systems Biology (MOSYS), Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria
- Vienna Doctoral School of Pharmaceutical, Nutritional and Sports Sciences, University of Vienna, Vienna, Austria
| | - Sheyda Bahiraii
- Vienna Doctoral School of Pharmaceutical, Nutritional and Sports Sciences, University of Vienna, Vienna, Austria
- Department of Pharmaceutical Sciences, University of Vienna, Vienna, Austria
| | - Martin Brenner
- Molecular Systems Biology (MOSYS), Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria
- Vienna Doctoral School of Pharmaceutical, Nutritional and Sports Sciences, University of Vienna, Vienna, Austria
- Department of Pharmaceutical Sciences, University of Vienna, Vienna, Austria
| | - Elke H Heiss
- Department of Pharmaceutical Sciences, University of Vienna, Vienna, Austria
| | - Wolfram Weckwerth
- Molecular Systems Biology (MOSYS), Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria
- Vienna Metabolomics Center (VIME), University of Vienna, Vienna, Austria
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7
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Ren F, Zhu W, Yang S, Zhang C, Hou Y, Li R, Wen J, Zou LH, Gao M, Wang WL, Wu Z, Shao A. Coumarin-Based Fluorescent Inhibitors for Photocontrollable Bioactivation. Mol Pharm 2023. [PMID: 37104703 DOI: 10.1021/acs.molpharmaceut.3c00279] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
Activation of the IRE-1/XBP-1 pathway is related to many human diseases. Coumarin-based derivatives acting as both IRE-1 inhibitors and bright fluorophores are highly desirable to establish an integrated fluorescent inhibitor system. Here, we take insights into the aqueous stability of a photocaged IRE-1 inhibitor PC-D-F07 through a structure activity relationship. The substituent effects indicate that the electron-withdrawing -NO2 moiety in the photocage combined with the tricyclic coumarin fluorophore contribute to the structural stability of PC-D-F07. To optimize the photocage of PC-D-F07, we incorporate a 1-ethyl-2-nitrobenzyl or 2-nitrobenzyl photolabile moiety on the hydroxyl group of the IRE-1 inhibitor to generate RF-7 and RF-8. Upon photoactivation, both RF-7 and RF-8 present an increased fluorescence response, sequentially enabling the unlocking of the ortho-1,3-dioxane acetal for the release of active IRE-1 inhibitors. Moreover, RF-7 exhibits a high repolarization ratio of converting M2-type tumor-associated macrophages (M2-TAMs) to M1-type immune-responsive macrophages. This provides a novel prodrug strategy of modulating druggable fluorophore backbones to achieve spatiotemporally controllable drug release for precise cancer treatment.
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Affiliation(s)
- Fei Ren
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wendi Zhu
- Department of Clinical Medicine, PUMC & CAMS, Beijing 100730, China
| | - Shuke Yang
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Chun Zhang
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Yingchao Hou
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Runqi Li
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Jian Wen
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Liang-Hua Zou
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Min Gao
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wen-Long Wang
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Zhihong Wu
- Department of Clinical Medicine, PUMC & CAMS, Beijing 100730, China
| | - Andong Shao
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
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8
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Dias AS, Almeida CR, Helguero LA, Duarte IF. Metabolic Reprogramming of Breast Tumor-Educated Macrophages Revealed by NMR Metabolomics. Cancers (Basel) 2023; 15:cancers15041211. [PMID: 36831553 PMCID: PMC9954003 DOI: 10.3390/cancers15041211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/03/2023] [Accepted: 02/09/2023] [Indexed: 02/17/2023] Open
Abstract
The metabolic crosstalk between tumor cells and tumor-associated macrophages (TAMs) has emerged as a critical contributor to tumor development and progression. In breast cancer (BC), the abundance of immune-suppressive TAMs positively correlates with poor prognosis. However, little is known about how TAMs reprogram their metabolism in the BC microenvironment. In this work, we have assessed the metabolic and phenotypic impact of incubating THP-1-derived macrophages in conditioned media (CM) from two BC cell lines cultured in normoxia/hypoxia: MDA-MB-231 cells (highly metastatic, triple-negative BC), and MCF-7 cells (less aggressive, luminal BC). The resulting tumor-educated macrophages (TEM) displayed prominent differences in their metabolic activity and composition, compared to control cells (M0), as assessed by exo- and endometabolomics. In particular, TEM turned to the utilization of extracellular pyruvate, alanine, and branched chain keto acids (BCKA), while exhibiting alterations in metabolites associated with several intracellular pathways, including polyamines catabolism (MDA-TEM), collagen degradation (mainly MCF-TEM), adenosine accumulation (mainly MDA-TEM) and lipid metabolism. Interestingly, following a second-stage incubation in fresh RPMI medium, TEM still displayed several metabolic differences compared to M0, indicating persistent reprogramming. Overall, this work provided new insights into the metabolic plasticity of TEM, revealing potentially important nutritional exchanges and immunoregulatory metabolites in the BC TME.
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Affiliation(s)
- Ana S. Dias
- CICECO—Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
- iBiMED—Institute of Biomedicine, Department of Medical Sciences, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Catarina R. Almeida
- iBiMED—Institute of Biomedicine, Department of Medical Sciences, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Luisa A. Helguero
- iBiMED—Institute of Biomedicine, Department of Medical Sciences, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Iola F. Duarte
- CICECO—Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
- Correspondence: ; Tel.: +351-234-401-418
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