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Shih WC, Jang IH, Kruglov V, Dickey D, Cholensky S, Bernlohr DA, Camell CD. Role for BLT1 in regulating inflammation within adipose tissue immune cells of aged mice. Immun Ageing 2024; 21:57. [PMID: 39187841 PMCID: PMC11346001 DOI: 10.1186/s12979-024-00461-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Accepted: 08/15/2024] [Indexed: 08/28/2024]
Abstract
BACKGROUND Aging is a complex biological process characterized by obesity and immunosenescence throughout the organism. Immunosenescence involves a decline in immune function and the increase in chronic-low grade inflammation, called inflammaging. Adipose tissue expansion, particularly that of visceral adipose tissue (VAT), is associated with an increase in pro-inflammatory macrophages that play an important role in modulating immune responses and producing inflammatory cytokines. The leukotriene B4 receptor 1 (BLT1) is a regulator of obesity-induced inflammation. Its ligand, LTB4, acts as a chemoattractant for immune cells and induces inflammation. Studies have shown that BLT1 is crucial for cytokine production during lipopolysaccharide (LPS) endotoxemia challenge in younger organisms. However, the expression patterns and function of BLT1 in older organisms remains unknown. RESULTS In this study, we investigated BLT1 expression in immune cell subsets within the VAT of aged male and female mice. Moreover, we examined how antagonizing BLT1 signaling could alter the inflammatory response to LPS in aged mice. Our results demonstrate that aged mice exhibit increased adiposity and inflammation, characterized by elevated frequencies of B and T cells, along with pro-inflammatory macrophages in VAT. BLT1 expression is the highest in VAT macrophages. LPS and LTB4 treatment result in increased BLT1 in young and aged bone marrow-derived macrophages (BMDMs). However, LTB4 treatment resulted in amplified Il6 from aged, but not young BMDMs. Treatment of aged mice with the BLT1 antagonist, U75302, followed by LPS-induced endotoxemia resulted in an increase in anti-inflammatory macrophages, reduced phosphorylated NFκB and reduced Il6. CONCLUSIONS This study provides valuable insights into the age- and sex- specific changes in BLT1 expression on immune cell subsets within VAT. This study offers support for the potential of BLT1 in modulating inflammation in aging.
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Affiliation(s)
- Wei-Ching Shih
- Department of Pharmacology, Molecular Pharmacology and Therapeutics Graduate Program, University of Minnesota, Minneapolis, MN, USA
| | - In Hwa Jang
- Department of Biochemistry, Molecular Biology and Biophysics, Institute on the Biology of Aging and Metabolism, University of Minnesota, Minneapolis, MN, USA
- Center for Immunology, University of Minnesota, Minneapolis, MN, USA
| | - Victor Kruglov
- Department of Biochemistry, Molecular Biology and Biophysics, Institute on the Biology of Aging and Metabolism, University of Minnesota, Minneapolis, MN, USA
| | - Deborah Dickey
- Department of Biochemistry, Molecular Biology and Biophysics, Institute on the Biology of Aging and Metabolism, University of Minnesota, Minneapolis, MN, USA
| | - Stephanie Cholensky
- Department of Biochemistry, Molecular Biology and Biophysics, Institute on the Biology of Aging and Metabolism, University of Minnesota, Minneapolis, MN, USA
- Center for Immunology, University of Minnesota, Minneapolis, MN, USA
| | - David A Bernlohr
- Department of Biochemistry, Molecular Biology and Biophysics, Institute on the Biology of Aging and Metabolism, University of Minnesota, Minneapolis, MN, USA
| | - Christina D Camell
- Department of Pharmacology, Molecular Pharmacology and Therapeutics Graduate Program, University of Minnesota, Minneapolis, MN, USA.
- Department of Biochemistry, Molecular Biology and Biophysics, Institute on the Biology of Aging and Metabolism, University of Minnesota, Minneapolis, MN, USA.
- Center for Immunology, University of Minnesota, Minneapolis, MN, USA.
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Yang M, Shu W, Zhai X, Yang X, Zhou H, Pan B, Li C, Lu D, Cai J, Zheng S, Jin B, Wei X, Xu X. Integrated multi-omic analysis identifies fatty acid binding protein 4 as a biomarker and therapeutic target of ischemia-reperfusion injury in steatotic liver transplantation. Cell Mol Life Sci 2024; 81:83. [PMID: 38341383 PMCID: PMC10858962 DOI: 10.1007/s00018-023-05110-1] [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: 09/26/2023] [Revised: 12/25/2023] [Accepted: 12/27/2023] [Indexed: 02/12/2024]
Abstract
BACKGROUND AND AIMS Due to a lack of donor grafts, steatotic livers are used more often for liver transplantation (LT). However, steatotic donor livers are more sensitive to ischemia-reperfusion (IR) injury and have a worse prognosis after LT. Efforts to optimize steatotic liver grafts by identifying injury targets and interventions have become a hot issue. METHODS Mouse LT models were established, and 4D label-free proteome sequencing was performed for four groups: normal control (NC) SHAM, high-fat (HF) SHAM, NC LT, and HF LT to screen molecular targets for aggravating liver injury in steatotic LT. Expression detection of molecular targets was performed based on liver specimens from 110 donors to verify its impact on the overall survival of recipients. Pharmacological intervention using small-molecule inhibitors on an injury-related target was used to evaluate the therapeutic effect. Transcriptomics and metabolomics were performed to explore the regulatory network and further integrated bioinformatics analysis and multiplex immunofluorescence were adopted to assess the regulation of pathways and organelles. RESULTS HF LT group represented worse liver function compared with NC LT group, including more apoptotic hepatocytes (P < 0.01) and higher serum transaminase (P < 0.05). Proteomic results revealed that the mitochondrial membrane, endocytosis, and oxidative phosphorylation pathways were upregulated in HF LT group. Fatty acid binding protein 4 (FABP4) was identified as a hypoxia-inducible protein (fold change > 2 and P < 0.05) that sensitized mice to IR injury in steatotic LT. The overall survival of recipients using liver grafts with high expression of FABP4 was significantly worse than low expression of FABP4 (68.5 vs. 87.3%, P < 0.05). Adoption of FABP4 inhibitor could protect the steatotic liver from IR injury during transplantation, including reducing hepatocyte apoptosis, reducing serum transaminase (P < 0.05), and alleviating oxidative stress damage (P < 0.01). According to integrated transcriptomics and metabolomics analysis, cAMP signaling pathway was enriched following FABP4 inhibitor use. The activation of cAMP signaling pathway was validated. Microscopy and immunofluorescence staining results suggested that FABP4 inhibitors could regulate mitochondrial membrane homeostasis in steatotic LT. CONCLUSIONS FABP4 was identified as a hypoxia-inducible protein that sensitized steatotic liver grafts to IR injury. The FABP4 inhibitor, BMS-309403, could activate of cAMP signaling pathway thereby modulating mitochondrial membrane homeostasis, reducing oxidative stress injury in steatotic donors.
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Affiliation(s)
- Mengfan Yang
- Department of Organ Transplantation, Qilu Hospital of Shandong University, Jinan, 250012, China
- Zhejiang University School of Medicine, Hangzhou, 310058, China
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, 310006, China
| | - Wenzhi Shu
- Zhejiang University School of Medicine, Hangzhou, 310058, China
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, 310006, China
| | - Xiangyu Zhai
- Department of Hepatobiliary Surgery, The Second Hospital, Shandong University, Jinan, 250033, China
| | - Xinyu Yang
- Zhejiang University School of Medicine, Hangzhou, 310058, China
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, 310006, China
| | - Huaxin Zhou
- Department of Hepatobiliary Surgery, The Second Hospital, Shandong University, Jinan, 250033, China
| | - Binhua Pan
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, 310006, China
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China
| | - Changbiao Li
- Zhejiang University School of Medicine, Hangzhou, 310058, China
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, 310006, China
| | - Di Lu
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, 310006, China
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China
| | - Jinzhen Cai
- Organ Transplantation Center, Affiliated Hospital of Qingdao University, Qingdao, 266035, China
| | - Shusen Zheng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Hangzhou, 310003, China
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, China
| | - Bin Jin
- Department of Organ Transplantation, Qilu Hospital of Shandong University, Jinan, 250012, China.
- Department of Hepatobiliary Surgery, The Second Hospital, Shandong University, Jinan, 250033, China.
| | - Xuyong Wei
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, 310006, China.
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China.
| | - Xiao Xu
- Zhejiang University School of Medicine, Hangzhou, 310058, China.
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, 310006, China.
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Hangzhou, 310003, China.
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Kim SH, Pyo JS, Son BK, Oh IH, Min KW. Clinicopathological significance and prognostic implication of nuclear fatty acid-binding protein 4 expression in colorectal cancer. Pathol Res Pract 2023; 249:154722. [PMID: 37591068 DOI: 10.1016/j.prp.2023.154722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 07/21/2023] [Accepted: 07/26/2023] [Indexed: 08/19/2023]
Abstract
This study aimed to evaluate the clinicopathological significance and prognostic role of fatty acid-binding protein 4 (FABP4) expression in colorectal cancer (CRC). Nuclear expression of FABP4 was investigated by immunohistochemistry for FABP4 on 246 human CRC tissues. The correlations between FABP4 expression, and clinicopathological characteristics and survival, was evaluated in patients with CRC. FABP4 was expressed in 91 of the 246 CRC tissues (37.0%). FABP4 expression was significantly correlated with older age, right-sided colon cancer, perineural invasion, higher pT stage, lymph node metastasis, and higher pTNM stage. However, there was no significant correlation between FABP4 expression and sex, tumor size, tumor differentiation, vascular or lymphatic invasion, or distant metastasis. Nuclear FABP4 expression was not significantly correlated with cytoplasmic FABP4 expression (P = 0.412). FABP4 expression was significantly correlated with nuclear pNF-κB expression (P = 0.001), and was significantly higher in CRC with a low immunoscore than in CRC with a high immunoscore (P < 0.001). There were significant correlations between FABP4 expression and worse overall and recurrence-free survival rates (P < 0.001 and P = 0.007, respectively). FABP4 expression was significantly correlated with aggressive tumor behaviors and pathological characteristics. In addition, patients with CRC with FABP4 expression had worse survival rates.
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Affiliation(s)
- Soo Hyung Kim
- Department of Internal Medicine, Uijeongbu Eulji Medical Center, Eulji University School of Medicine, Gyeonggi-do, the Republic of Korea
| | - Jung-Soo Pyo
- Department of Pathology, Uijeongbu Eulji Medical Center, Eulji University School of Medicine, Gyeonggi-do, the Republic of Korea
| | - Byoung Kwan Son
- Department of Internal Medicine, Uijeongbu Eulji Medical Center, Eulji University School of Medicine, Gyeonggi-do, the Republic of Korea.
| | - Il Hwan Oh
- Department of Internal Medicine, Uijeongbu Eulji Medical Center, Eulji University School of Medicine, Gyeonggi-do, the Republic of Korea
| | - Kyueng-Whan Min
- Department of Pathology, Uijeongbu Eulji Medical Center, Eulji University School of Medicine, Gyeonggi-do, the Republic of Korea
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Abstract
Fatty acid-binding proteins (FABPs) are small lipid-binding proteins abundantly expressed in tissues that are highly active in fatty acid (FA) metabolism. Ten mammalian FABPs have been identified, with tissue-specific expression patterns and highly conserved tertiary structures. FABPs were initially studied as intracellular FA transport proteins. Further investigation has demonstrated their participation in lipid metabolism, both directly and via regulation of gene expression, and in signaling within their cells of expression. There is also evidence that they may be secreted and have functional impact via the circulation. It has also been shown that the FABP ligand binding repertoire extends beyond long-chain FAs and that their functional properties also involve participation in systemic metabolism. This article reviews the present understanding of FABP functions and their apparent roles in disease, particularly metabolic and inflammation-related disorders and cancers.
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Affiliation(s)
- Judith Storch
- Department of Nutritional Sciences and Rutgers Center for Lipid Research, Rutgers University, New Brunswick, New Jersey, United States;
| | - Betina Corsico
- Instituto de Investigaciones Bioquímicas de La Plata, CONICET-UNLP, Facultad de Ciencias Médicas, La Plata, Argentina;
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5
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Shi Y, Wang CC, Wu L, Zhang Y, Xu A, Wang Y. Pathophysiological Insight into Fatty Acid-Binding Protein-4: Multifaced Roles in Reproduction, Pregnancy, and Offspring Health. Int J Mol Sci 2023; 24:12655. [PMID: 37628833 PMCID: PMC10454382 DOI: 10.3390/ijms241612655] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/04/2023] [Accepted: 08/06/2023] [Indexed: 08/27/2023] Open
Abstract
Fatty acid-binding protein-4 (FABP4), commonly known as adipocyte-fatty acid-binding protein (A-FABP), is a pleiotropic adipokine that broadly affects immunity and metabolism. It has been increasingly recognized that FABP4 dysfunction is associated with various metabolic syndromes, including obesity, diabetes, cardiovascular diseases, and metabolic inflammation. However, its explicit roles within the context of women's reproduction and pregnancy remain to be investigated. In this review, we collate recent studies probing the influence of FABP4 on female reproduction, pregnancy, and even fetal health. Elevated circulating FABP4 levels have been found to correlate with impaired reproductive function in women, such as polycystic ovary syndrome and endometriosis. Throughout pregnancy, FABP4 affects maternal-fetal interface homeostasis by affecting both glycolipid metabolism and immune tolerance, leading to adverse pregnancy outcomes, including miscarriage, gestational obesity, gestational diabetes, and preeclampsia. Moreover, maternal FABP4 levels exhibit a substantial linkage with the metabolic health of offspring. Herein, we discuss the emerging significance and potential application of FABP4 in reproduction and pregnancy health and delve into its underlying mechanism at molecular levels.
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Affiliation(s)
- Yue Shi
- The Second Clinical Medical School, Beijing University of Chinese Medicine, Beijing 100078, China; (Y.S.); (Y.Z.)
| | - Chi-Chiu Wang
- Department of Obstetrics and Gynaecology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong;
- Li Ka Shing Institute of Health Sciences, School of Biomedical Sciences, Chinese University of Hong Kong-Sichuan University Joint Laboratory in Reproductive Medicine, The Chinese University of Hong Kong, Hong Kong
| | - Liqun Wu
- Department of Pediatrics, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China;
| | - Yunqing Zhang
- The Second Clinical Medical School, Beijing University of Chinese Medicine, Beijing 100078, China; (Y.S.); (Y.Z.)
| | - Aimin Xu
- State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong;
- Department of Medicine, The University of Hong Kong, Hong Kong
| | - Yao Wang
- Department of Obstetrics and Gynaecology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong;
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6
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Liu L, Shi Z, Ji X, Zhang W, Luan J, Zahr T, Qiang L. Adipokines, adiposity, and atherosclerosis. Cell Mol Life Sci 2022; 79:272. [PMID: 35503385 PMCID: PMC11073100 DOI: 10.1007/s00018-022-04286-2] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 03/11/2022] [Accepted: 04/03/2022] [Indexed: 12/12/2022]
Abstract
Characterized by a surplus of whole-body adiposity, obesity is strongly associated with the prognosis of atherosclerosis, a hallmark of coronary artery disease (CAD) and the major contributor to cardiovascular disease (CVD) mortality. Adipose tissue serves a primary role as a lipid-storage organ, secreting cytokines known as adipokines that affect whole-body metabolism, inflammation, and endocrine functions. Emerging evidence suggests that adipokines can play important roles in atherosclerosis development, progression, as well as regression. Here, we review the versatile functions of various adipokines in atherosclerosis and divide these respective functions into three major groups: protective, deteriorative, and undefined. The protective adipokines represented here are adiponectin, fibroblast growth factor 21 (FGF-21), C1q tumor necrosis factor-related protein 9 (CTRP9), and progranulin, while the deteriorative adipokines listed include leptin, chemerin, resistin, Interleukin- 6 (IL-6), and more, with additional adipokines that have unclear roles denoted as undefined adipokines. Comprehensively categorizing adipokines in the context of atherosclerosis can help elucidate the various pathways involved and potentially pave novel therapeutic approaches to treat CVDs.
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Affiliation(s)
- Longhua Liu
- School of Kinesiology, Shanghai University of Sport, Shanghai, People's Republic of China.
| | - Zunhan Shi
- School of Kinesiology, Shanghai University of Sport, Shanghai, People's Republic of China
| | - Xiaohui Ji
- School of Kinesiology, Shanghai University of Sport, Shanghai, People's Republic of China
| | - Wenqian Zhang
- School of Kinesiology, Shanghai University of Sport, Shanghai, People's Republic of China
| | - Jinwen Luan
- School of Kinesiology, Shanghai University of Sport, Shanghai, People's Republic of China
| | - Tarik Zahr
- Department of Pharmacology, Columbia University, New York, NY, USA
| | - Li Qiang
- Department of Pathology and Cellular Biology and Naomi Berrie Diabetes Center, Columbia University, New York, NY, USA.
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Unveiling the Role of the Fatty Acid Binding Protein 4 in the Metabolic-Associated Fatty Liver Disease. Biomedicines 2022; 10:biomedicines10010197. [PMID: 35052876 PMCID: PMC8773613 DOI: 10.3390/biomedicines10010197] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/14/2022] [Accepted: 01/16/2022] [Indexed: 02/04/2023] Open
Abstract
Metabolic-associated fatty liver disease (MAFLD), the main cause of chronic liver disease worldwide, is a progressive disease ranging from fatty liver to steatohepatitis (metabolic-associated steatohepatitis; MASH). Nevertheless, it remains underdiagnosed due to the lack of effective non-invasive methods for its diagnosis and staging. Although MAFLD has been found in lean individuals, it is closely associated with obesity-related conditions. Adipose tissue is the main source of liver triglycerides and adipocytes act as endocrine organs releasing a large number of adipokines and pro-inflammatory mediators involved in MAFLD progression into bloodstream. Among the adipocyte-derived molecules, fatty acid binding protein 4 (FABP4) has been recently associated with fatty liver and additional features of advanced stages of MAFLD. Additionally, emerging data from preclinical studies propose FABP4 as a causal actor involved in the disease progression, rather than a mere biomarker for the disease. Therefore, the FABP4 regulation could be considered as a potential therapeutic strategy to MAFLD. Here, we review the current knowledge of FABP4 in MAFLD, as well as its potential role as a therapeutic target for this disease.
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Lands B. Lipid nutrition: "In silico" studies and undeveloped experiments. Prog Lipid Res 2021; 85:101142. [PMID: 34818526 DOI: 10.1016/j.plipres.2021.101142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 11/11/2021] [Accepted: 11/12/2021] [Indexed: 12/14/2022]
Abstract
This review examines lipids and lipid-binding sites on proteins in relation to cardiovascular disease. Lipid nutrition involves food energy from ingested fatty acids plus fatty acids formed from excess ingested carbohydrate and protein. Non-esterified fatty acids (NEFA) and lipoproteins have many detailed attributes not evident in their names. Recognizing attributes of lipid-protein interactions decreases unexpected outcomes. Details of double bond position and configuration interacting with protein binding sites have unexpected consequences in acyltransferase and cell replication events. Highly unsaturated fatty acids (HUFA) have n-3 and n-6 motifs with documented differences in intensity of destabilizing positive feedback loops amplifying pathophysiology. However, actions of NEFA have been neglected relative to cholesterol, which is co-produced from excess food. Native low-density lipoproteins (LDL) bind to a high-affinity cell surface receptor which poorly recognizes biologically modified LDLs. NEFA increase negative charge of LDL and decrease its processing by "normal" receptors while increasing processing by "scavenger" receptors. A positive feedback loop in the recruitment of monocytes and macrophages amplifies chronic inflammatory pathophysiology. Computer tools combine multiple components in lipid nutrition and predict balance of energy and n-3:n-6 HUFA. The tools help design and execute precise clinical nutrition monitoring that either supports or disproves expectations.
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Affiliation(s)
- Bill Lands
- Fellow ASN, AAAS, SFRBM, ISSFAL, College Park, MD, USA.
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9
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Sun F, Chen G, Yang Y, Lei M. Fatty acid-binding protein 4 silencing protects against lipopolysaccharide-induced cardiomyocyte hypertrophy and apoptosis by inhibiting the Toll-like receptor 4-nuclear factor-κB pathway. J Int Med Res 2021; 49:300060521998233. [PMID: 33719658 PMCID: PMC7952852 DOI: 10.1177/0300060521998233] [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] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Objective To explore the effects and potential mechanisms of fatty acid-binding protein 4 (FABP4) in a lipopolysaccharide (LPS)-induced in vitro septic cardiomyopathy model. Methods Rat cardiomyocyte H9c2 cells were transfected with small interfering RNA (siRNA) against FABP4 (siFABP4), then induced with LPS. The following parameters were measured: cell viability, lactate dehydrogenase release, cardiac hypertrophy and related marker expression, apoptosis, inflammatory cytokine release and expression, and the activation of Toll-like receptor 4 (TLR4) and nuclear factor-κB (NF-κB) pathways. Results LPS increased the mRNA and protein expression of FABP4 in H9c2 cells. FABP4 silencing by siFABP4 significantly inhibited LPS-induced cardiac hypertrophy and reduced the mRNA expression of the myocardial hypertrophy markers atrial natriuretic peptide and brain natriuretic peptide. siFABP4 also attenuated LPS-induced increase in TUNEL-positive apoptotic cells, caspase-3 and caspase-9 activities, and the release and expression of proinflammatory cytokines. Mechanistically, we found that FABP4 silencing inhibited the mRNA and protein expression of TLR4 and suppressed the NF-kappa B signaling pathway, as evidenced by reduced nuclear NF-κB p65 and increased cytoplasmic I-κBα expression in LPS-stimulated H9c2 cells. Conclusion FABP4 silencing reduces LPS-induced cardiomyocyte hypertrophy and apoptosis by down-regulating the TLR4/NF-κB axis.
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Affiliation(s)
- Fangyuan Sun
- Department of Intensive Care Medicine, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, P.R. China
| | - Gang Chen
- Department of Intensive Care Medicine, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, P.R. China
| | - Yingyao Yang
- Yueyang Hospital of Integrated Chinese and Western Medicine, Shanghai University of TCM, Shanghai, P.R. China
| | - Ming Lei
- Department of Intensive Care Medicine, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, P.R. China
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Hansen C, Sastre C, Wolcott Z, Bevers MB, Kimberly WT. Time-dependent, dynamic prediction of fatty acid-binding protein 4, Galectin-3, and soluble ST2 measurement with poor outcome after acute stroke. Int J Stroke 2020; 16:660-668. [PMID: 33167787 DOI: 10.1177/1747493020971166] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND Time-dependent change in the level of biomarkers after stroke is not well understood. We sought to compare fatty acid-binding protein 4 (FABP4), Galectin-3, and soluble ST2 to ascertain for a change in prediction of outcome at admission and 48 h later. METHODS Plasma FABP4, Galectin-3, and soluble ST2 were measured in biospecimens from acute stroke patients at the time of admission (n = 383) and 48 h later (n = 244). Functional outcome was assessed at 90 days using the modified Rankin Scale and dichotomized into good (modified Rankin Scale 0-2) and poor outcome (modified Rankin Scale 3-6). RESULTS On admission, elevated levels of each biomarker predicted poor outcome (FABP4: OR 1.92, 95% CI 1.42-2.59, P < 0.0001; Galectin-3: OR 1.85, 95% CI 1.42-2.40, P < 0.0001; soluble ST2: OR 1.55, 95% CI 1.22-1.97, P < 0.0001) and death (FABP4: OR 2.45; 95% CI 1.51-3.98; P < 0.0001; Galectin-3: OR 2.12; 95% CI 1.50-3.30; P < 0.0001; soluble ST2: OR 2.17; 95% CI 1.58-2.99; P < 0.0001). At 48 h, soluble ST2 predicted poor outcome (OR 2.62, 95% CI 1.77-3.88, P < 0.0001) and mortality (OR 3.36, 95% CI 2.06-5.48, P < 0.0001), and Galectin-3 predicted mortality only (OR 1.81, 95% CI 1.05-3.10, P = 0.033). FABP4 measured at 48 h was not predictive of outcome or death. Associations of Galectin-3 and soluble ST2 with outcome or mortality were independent of age, sex, and NIHSS, whereas those with FABP4 were not. CONCLUSIONS Galectin-3 performed better when measured on admission, whereas soluble ST2 was predictive at admission and better at 48 h after stroke. The time-dependent differences may reflect the evolving role of these pathways after acute stroke.
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Affiliation(s)
- Christina Hansen
- Department of Neurology, Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Cristina Sastre
- Department of Neurology, Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Zoe Wolcott
- Department of Neurology, Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Matthew B Bevers
- Divisions of Stroke, Cerebrovascular and Critical Care Neurology, Brigham and Women's Hospital, Boston, MA, USA
| | - W Taylor Kimberly
- Department of Neurology, Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
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11
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Aslani MR, Ghazaei Z, Ghobadi H. Correlation of serum fatty acid binding protein-4 and interleukin-6 with airflow limitation and quality of life in stable and acute exacerbation of COPD. Turk J Med Sci 2020; 50:337-345. [PMID: 31905499 PMCID: PMC7164746 DOI: 10.3906/sag-1909-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 01/02/2020] [Indexed: 01/05/2023] Open
Abstract
Background/aim The serum fatty acid binding protein 4 (FABP-4) level increases in chronic inflammatory diseases. The present study aimed to examine serum FABP-4 and interleukin (IL)-6 levels in patients with stable and acute exacerbation of chronic obstructive pulmonary disease (COPD) and the correlation of these markers with airflow limitation. Materials and methodsS We measured serum FABP-4 and IL-6 levels in 60 COPD patients [30 stable COPD (SCOPD), and 30 acute exacerbation of COPD (AECOPD)], and 30 healthy subjects and compared them with airflow limitation according to the COPD stage in the Global Initiative for Chronic Obstructive Pulmonary Disease (GOLD) criteria, peripheral O2 saturation (SpO2), and COPD Assessment Test (CAT) score. We also tested the association between serum FABP-4 levels and some characteristics of study parameters. Results Both serum FABP-4 and IL-6 levels increased with increasing severity of GOLD grades in SCOPD (P < 0.01 for both) and AECOPD groups (P < 0.001 and P < 0.01, respectively). It also increased in patients with AECOPD group compared with SCOPD group in GOLD grades I-II (P < 0.01) and GOLD grades III-IV (P < 0.05). In addition, there was a significant positive correlation between serum FABP-4 level with IL-6, CAT score, and smoking history and inversely with FEV1 and SpO2. Conclusion The study revealed that serum FABP-4 level was elevated with increasing GOLD grades in COPD patients, markedly in acute exacerbation phase. The increase was associated with elevated serum levels of IL-6 and severity of hypoxia. Thus, it seems that FABP-4 may be involved in the pathogenesis of COPD.
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Affiliation(s)
- Mohammad Reza Aslani
- Lung Inflammatory Diseases Research Centre, Faculty of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran
- Neurogenic Inflammation Research Centre, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Zeynab Ghazaei
- Faculty of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Hassan Ghobadi
- Internal Medicine Department (Pulmonary Division), Faculty of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran
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Wang X, Liu J, Wang D, Zhu H, Kang L, Jiang J. Expression and correlation of Chemerin and FABP4 in peripheral blood of gestational diabetes mellitus patients. Exp Ther Med 2020; 19:710-716. [PMID: 31897106 PMCID: PMC6913377 DOI: 10.3892/etm.2019.8247] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 11/18/2019] [Indexed: 02/07/2023] Open
Abstract
Expression and correlation of Chemerin and fatty acid-binding protein 4 (FABP4) in peripheral blood of gestational diabetes mellitus (GDM) patients were investigated. Sixty patients with GDM from March 2018 to March 2019 in the People's Hospital of Zhangqiu Area were selected as the study group (SG) and another 50 healthy pregnant women corresponding to their age and pregnancy were selected as the control group (CG). Enzyme linked immunosorbent assay (ELISA) was used to detect the expression of Chemerin and FABP4 in serum. Receiver operating characteristic (ROC) curve was used to evaluate the diagnostic value of Chemerin and FABP4 in peripheral blood for GDM patients. Pearson's correlation coefficient was used to analyze the correlation between Chemerin and FABP4 and the correlation between Chemerin and inflammatory factors such as interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α). Expression of Chemerin and FABP4 in peripheral blood of GDM patients were significantly higher than those in CG. The AUC of GDM patients diagnosed with Chemerin and FABP4 in peripheral blood was 0.820 and 0.814, while the AUC of GDM patients diagnosed with Chemerin combined with FABP4 in peripheral blood was 0.904. Expression of inflammatory factors IL-6 and TNF-α in the SG were significantly higher than those in the CG. Chemerin in the SG was positively correlated with FABP4 and positively correlated with inflammatory factors IL-6 and TNF-α. Patients with advanced age (≥35 years), family history of diabetes, hyperlipidemia, high pre-pregnancy BMI, high fasting blood glucose, high Chemerin and high FABP4 expression have high risk of GDM. In conclusion, Chemerin and FABP4 were upregulated in the peripheral blood of GDM patients. There was a positive correlation between the two and a positive correlation with the inflammatory factors IL-6 and TNF-α.
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Affiliation(s)
- Xueling Wang
- Department of Obstetrics and Gynecology, The People's Hospital of Zhangqiu Area, Jinan, Shandong 250200, P.R. China
| | - Juanjuan Liu
- Department of Obstetrics, The Third People's Hospital of Qingdao, Qingdao, Shandong 266041, P.R. China
| | - Dongqing Wang
- Department of Obstetrics (Maternal and Child Health Center), The People's Hospital of Zhangqiu Area, Jinan, Shandong 250200, P.R. China
| | - Honghua Zhu
- Department of Gastroenterology, The People's Hospital of Zhangqiu Area, Jinan, Shandong 250200, P.R. China
| | - Le Kang
- Department of Obstetrics, The People's Hospital of Zhangqiu Area, Jinan, Shandong 250200, P.R. China
| | - Juan Jiang
- Department of Nursing, The Third People's Hospital of Qingdao, Qingdao, Shandong 266041, P.R. China
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13
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Oddi S, Scipioni L, Totaro A, Angelucci C, Dufrusine B, Sabatucci A, Tortolani D, Coletta I, Alisi MA, Polenzani L, Assfalg M, Caltagirone C, Dainese E, Maccarrone M. The anti-inflammatory agent bindarit acts as a modulator of fatty acid-binding protein 4 in human monocytic cells. Sci Rep 2019; 9:15155. [PMID: 31641194 PMCID: PMC6805920 DOI: 10.1038/s41598-019-51691-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 10/07/2019] [Indexed: 01/11/2023] Open
Abstract
We investigated the cellular and molecular mechanisms by which bindarit, a small indazolic derivative with prominent anti-inflammatory effects, exerts its immunoregulatory activity in lipopolysaccharide (LPS) stimulated human monocytic cells. We found that bindarit differentially regulates the release of interleukin-8 (IL-8) and monocyte chemoattractant protein-1 (MCP-1), enhancing the release of IL-8 and reducing that of MCP-1. These effects specifically required a functional interaction between bindarit and fatty acid binding protein 4 (FABP4), a lipid chaperone that couples intracellular lipid mediators to their biological targets and signaling pathways. We further demonstrated that bindarit can directly interact with FABP4 by increasing its expression and nuclear localization, thus impacting on peroxisome proliferator-activated receptor γ (PPARγ) and LPS-dependent kinase signaling. Taken together, these findings suggest a potential key-role of FABP4 in the immunomodulatory activity of bindarit, and extend the spectrum of its possible therapeutic applications to FABP4 modulation.
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Affiliation(s)
- Sergio Oddi
- Faculty of Veterinary Medicine, University of Teramo, Teramo, 64100, Italy.
- European Center for Brain Research (CERC)/Santa Lucia Foundation IRCCS, Rome, 00143, Italy.
| | - Lucia Scipioni
- European Center for Brain Research (CERC)/Santa Lucia Foundation IRCCS, Rome, 00143, Italy
| | - Antonio Totaro
- European Center for Brain Research (CERC)/Santa Lucia Foundation IRCCS, Rome, 00143, Italy
| | - Clotilde Angelucci
- Faculty of Veterinary Medicine, University of Teramo, Teramo, 64100, Italy
| | - Beatrice Dufrusine
- Faculty of Veterinary Medicine, University of Teramo, Teramo, 64100, Italy
| | | | - Daniel Tortolani
- Faculty of Veterinary Medicine, University of Teramo, Teramo, 64100, Italy
| | - Isabella Coletta
- Angelini RR&D (Research, Regulatory & Development), Angelini S.p.A., Rome, 00181, Italy
| | | | - Lorenzo Polenzani
- Angelini RR&D (Research, Regulatory & Development), Angelini S.p.A., Rome, 00181, Italy
| | - Michael Assfalg
- Department of Biotechnology, University of Verona, Verona, 37129, Italy
| | - Carlo Caltagirone
- European Center for Brain Research (CERC)/Santa Lucia Foundation IRCCS, Rome, 00143, Italy
| | - Enrico Dainese
- Faculty of Veterinary Medicine, University of Teramo, Teramo, 64100, Italy
| | - Mauro Maccarrone
- European Center for Brain Research (CERC)/Santa Lucia Foundation IRCCS, Rome, 00143, Italy.
- Department of Medicine, Campus Bio-Medico University of Rome, Rome, 00128, Italy.
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Funcke JB, Scherer PE. Beyond adiponectin and leptin: adipose tissue-derived mediators of inter-organ communication. J Lipid Res 2019; 60:1648-1684. [PMID: 31209153 PMCID: PMC6795086 DOI: 10.1194/jlr.r094060] [Citation(s) in RCA: 176] [Impact Index Per Article: 35.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 06/17/2019] [Indexed: 01/10/2023] Open
Abstract
The breakthrough discoveries of leptin and adiponectin more than two decades ago led to a widespread recognition of adipose tissue as an endocrine organ. Many more adipose tissue-secreted signaling mediators (adipokines) have been identified since then, and much has been learned about how adipose tissue communicates with other organs of the body to maintain systemic homeostasis. Beyond proteins, additional factors, such as lipids, metabolites, noncoding RNAs, and extracellular vesicles (EVs), released by adipose tissue participate in this process. Here, we review the diverse signaling mediators and mechanisms adipose tissue utilizes to relay information to other organs. We discuss recently identified adipokines (proteins, lipids, and metabolites) and briefly outline the contributions of noncoding RNAs and EVs to the ever-increasing complexities of adipose tissue inter-organ communication. We conclude by reflecting on central aspects of adipokine biology, namely, the contribution of distinct adipose tissue depots and cell types to adipokine secretion, the phenomenon of adipokine resistance, and the capacity of adipose tissue to act both as a source and sink of signaling mediators.
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Affiliation(s)
- Jan-Bernd Funcke
- Touchstone Diabetes Center, University of Texas Southwestern Medical Center, Dallas, TX
| | - Philipp E Scherer
- Touchstone Diabetes Center, University of Texas Southwestern Medical Center, Dallas, TX
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Ježek P, Holendová B, Garlid KD, Jabůrek M. Mitochondrial Uncoupling Proteins: Subtle Regulators of Cellular Redox Signaling. Antioxid Redox Signal 2018; 29:667-714. [PMID: 29351723 PMCID: PMC6071544 DOI: 10.1089/ars.2017.7225] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
SIGNIFICANCE Mitochondria are the energetic, metabolic, redox, and information signaling centers of the cell. Substrate pressure, mitochondrial network dynamics, and cristae morphology state are integrated by the protonmotive force Δp or its potential component, ΔΨ, which are attenuated by proton backflux into the matrix, termed uncoupling. The mitochondrial uncoupling proteins (UCP1-5) play an eminent role in the regulation of each of the mentioned aspects, being involved in numerous physiological events including redox signaling. Recent Advances: UCP2 structure, including purine nucleotide and fatty acid (FA) binding sites, strongly support the FA cycling mechanism: UCP2 expels FA anions, whereas uncoupling is achieved by the membrane backflux of protonated FA. Nascent FAs, cleaved by phospholipases, are preferential. The resulting Δp dissipation decreases superoxide formation dependent on Δp. UCP-mediated antioxidant protection and its impairment are expected to play a major role in cell physiology and pathology. Moreover, UCP2-mediated aspartate, oxaloacetate, and malate antiport with phosphate is expected to alter metabolism of cancer cells. CRITICAL ISSUES A wide range of UCP antioxidant effects and participations in redox signaling have been reported; however, mechanisms of UCP activation are still debated. Switching off/on the UCP2 protonophoretic function might serve as redox signaling either by employing/releasing the extra capacity of cell antioxidant systems or by directly increasing/decreasing mitochondrial superoxide sources. Rapid UCP2 degradation, FA levels, elevation of purine nucleotides, decreased Mg2+, or increased pyruvate accumulation may initiate UCP-mediated redox signaling. FUTURE DIRECTIONS Issues such as UCP2 participation in glucose sensing, neuronal (synaptic) function, and immune cell activation should be elucidated. Antioxid. Redox Signal. 29, 667-714.
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Affiliation(s)
- Petr Ježek
- 1 Department of Mitochondrial Physiology, Institute of Physiology of the Czech Academy of Sciences , Prague, Czech Republic
| | - Blanka Holendová
- 1 Department of Mitochondrial Physiology, Institute of Physiology of the Czech Academy of Sciences , Prague, Czech Republic
| | - Keith D Garlid
- 2 UCLA Cardiovascular Research Laboratory, David Geffen School of Medicine at UCLA , Los Angeles, California
| | - Martin Jabůrek
- 1 Department of Mitochondrial Physiology, Institute of Physiology of the Czech Academy of Sciences , Prague, Czech Republic
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Ge XN, Bastan I, Dileepan M, Greenberg Y, Ha SG, Steen KA, Bernlohr DA, Rao SP, Sriramarao P. FABP4 regulates eosinophil recruitment and activation in allergic airway inflammation. Am J Physiol Lung Cell Mol Physiol 2018; 315:L227-L240. [PMID: 29696987 PMCID: PMC6139653 DOI: 10.1152/ajplung.00429.2017] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 04/17/2018] [Accepted: 04/18/2018] [Indexed: 12/11/2022] Open
Abstract
Fatty acid binding protein 4 (FABP4), a member of a family of lipid-binding proteins, is known to play a role in inflammation by virtue of its ability to regulate intracellular events such as lipid fluxes and signaling. Studies have indicated a proinflammatory role for FABP4 in allergic asthma although its expression and function in eosinophils, the predominant inflammatory cells recruited to allergic airways, were not investigated. We examined expression of FABP4 in murine eosinophils and its role in regulating cell recruitment in vitro as well as in cockroach antigen (CRA)-induced allergic airway inflammation. CRA exposure led to airway recruitment of FABP4-expressing inflammatory cells, specifically eosinophils, in wild-type (WT) mice. FABP4 expression in eosinophils was induced by TNF-α as well as IL-4 and IL-13. FABP4-deficient eosinophils exhibited markedly decreased cell spreading/formation of leading edges on vascular cell adhesion molecule-1 and significantly decreased adhesion to intercellular adhesion molecule-1 associated with reduced β2-integrin expression relative to WT cells. Furthermore, FABP4-deficient eosinophils exhibited decreased migration, F-actin polymerization, calcium flux, and ERK(1/2) phosphorylation in response to eotaxin-1. In vivo, CRA-challenged FABP4-deficient mice exhibited attenuated eosinophilia and significantly reduced airway inflammation (improved airway reactivity, lower IL-5, IL-13, TNF-α, and cysteinyl leukotriene C4 levels, decreased airway structural changes) compared with WT mice. In conclusion, expression of FABP4 in eosinophils is induced during conditions of inflammation and plays a proinflammatory role in the development of allergic asthma by promoting eosinophil adhesion and migration and contributing to the development of various aspects of airway inflammation.
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Affiliation(s)
- Xiao Na Ge
- Laboratory of Allergic Diseases and Inflammation, Department of Veterinary and Biomedical Sciences, Saint Paul, Minnesota
| | - Idil Bastan
- Laboratory of Allergic Diseases and Inflammation, Department of Veterinary and Biomedical Sciences, Saint Paul, Minnesota
| | - Mythili Dileepan
- Laboratory of Allergic Diseases and Inflammation, Department of Veterinary and Biomedical Sciences, Saint Paul, Minnesota
| | - Yana Greenberg
- Laboratory of Allergic Diseases and Inflammation, Department of Veterinary and Biomedical Sciences, Saint Paul, Minnesota
| | - Sung Gil Ha
- Laboratory of Allergic Diseases and Inflammation, Department of Veterinary and Biomedical Sciences, Saint Paul, Minnesota
| | - Kaylee A. Steen
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Saint Paul, Minnesota
| | - David A. Bernlohr
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Saint Paul, Minnesota
| | - Savita P. Rao
- Laboratory of Allergic Diseases and Inflammation, Department of Veterinary and Biomedical Sciences, Saint Paul, Minnesota
| | - P. Sriramarao
- Laboratory of Allergic Diseases and Inflammation, Department of Veterinary and Biomedical Sciences, Saint Paul, Minnesota
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17
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Bosquet A, Girona J, Guaita-Esteruelas S, Heras M, Saavedra-García P, Martínez-Micaelo N, Masana L, Rodríguez-Calvo R. FABP4 inhibitor BMS309403 decreases saturated-fatty-acid-induced endoplasmic reticulum stress-associated inflammation in skeletal muscle by reducing p38 MAPK activation. Biochim Biophys Acta Mol Cell Biol Lipids 2018; 1863:604-613. [DOI: 10.1016/j.bbalip.2018.03.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 03/02/2018] [Accepted: 03/13/2018] [Indexed: 12/12/2022]
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18
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陈 纪, 吴 旭. [miR-203 inhibits lung cancer cell metastasis by targeting fatty acid binding protein 4]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2018; 38:578-583. [PMID: 29891455 PMCID: PMC6743894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Indexed: 07/30/2024]
Abstract
OBJECTIVE To explore the role of fatty acid binding protein 4 (FABP4) in regulating lung cancer cell metastasis and identify miRNAs that target FABP4. METHODS The expression of FABP4 in lung cancer cells with different metastatic potentials was detected using enzyme-linked immunosorbent assay (ELISA) and Western blotting. The effects of FABP4 knockdown or overexpression by shRNA or a recombinant lentivirus, respectively, on lung cancer cells metastasis were assessed. The miRNAs that targeted FABP4 were screened using target prediction algorithms and the results were verified with Q-PCR. RESULTS FABP4 expression was significantly higher in lung cancer cell lines with high metastatic potentials (NL9980, H661, and 95C) than in those with low metastatic potentials (L9981, A549, and PC13) (P<0.05). FABP4 knockdown in NL9980 cells resulted in significantly inhibited metastasis of the cells (P<0.05), while FABP4 overexpression obviously promoted the metastasis of A549 cells (P<0.05). The expressions of miR-203, miR-361 and miR-539 were significantly higher in highly metastatic lung cancer cells than in the cells with low metastatic potentials (P<0.05). In NL9980 cells, FABP4 expression was most obviously suppressed by miR-203 (P<0.05), and target site mutational FABP4 overexpression significantly attenuated the inhibitory effect of miR-203 on NL9980 metastasis (P<0.05). CONCLUSION FABP4 can promote lung cancer metastasis, and by targeting FABP4 to inhibit its expression, miR-203 can suppress the metastasis of lung cancer cells.
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Affiliation(s)
- 纪超 陈
- />南方医科大学南方医院惠侨医疗中心, 广东 广州 510515Huiqiao Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - 旭 吴
- />南方医科大学南方医院惠侨医疗中心, 广东 广州 510515Huiqiao Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
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19
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陈 纪, 吴 旭. [miR-203 inhibits lung cancer cell metastasis by targeting fatty acid binding protein 4]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2018; 38:578-583. [PMID: 29891455 PMCID: PMC6743894 DOI: 10.3969/j.issn.1673-4254.2018.05.12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To explore the role of fatty acid binding protein 4 (FABP4) in regulating lung cancer cell metastasis and identify miRNAs that target FABP4. METHODS The expression of FABP4 in lung cancer cells with different metastatic potentials was detected using enzyme-linked immunosorbent assay (ELISA) and Western blotting. The effects of FABP4 knockdown or overexpression by shRNA or a recombinant lentivirus, respectively, on lung cancer cells metastasis were assessed. The miRNAs that targeted FABP4 were screened using target prediction algorithms and the results were verified with Q-PCR. RESULTS FABP4 expression was significantly higher in lung cancer cell lines with high metastatic potentials (NL9980, H661, and 95C) than in those with low metastatic potentials (L9981, A549, and PC13) (P<0.05). FABP4 knockdown in NL9980 cells resulted in significantly inhibited metastasis of the cells (P<0.05), while FABP4 overexpression obviously promoted the metastasis of A549 cells (P<0.05). The expressions of miR-203, miR-361 and miR-539 were significantly higher in highly metastatic lung cancer cells than in the cells with low metastatic potentials (P<0.05). In NL9980 cells, FABP4 expression was most obviously suppressed by miR-203 (P<0.05), and target site mutational FABP4 overexpression significantly attenuated the inhibitory effect of miR-203 on NL9980 metastasis (P<0.05). CONCLUSION FABP4 can promote lung cancer metastasis, and by targeting FABP4 to inhibit its expression, miR-203 can suppress the metastasis of lung cancer cells.
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Affiliation(s)
- 纪超 陈
- />南方医科大学南方医院惠侨医疗中心, 广东 广州 510515Huiqiao Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - 旭 吴
- />南方医科大学南方医院惠侨医疗中心, 广东 广州 510515Huiqiao Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
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