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Dong WS, Hu C, Hu M, Gao YP, Hu YX, Li K, Ye YJ, Zhang X. Metrnl: a promising biomarker and therapeutic target for cardiovascular and metabolic diseases. Cell Commun Signal 2024; 22:389. [PMID: 39103830 DOI: 10.1186/s12964-024-01767-8] [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: 05/12/2024] [Accepted: 07/27/2024] [Indexed: 08/07/2024] Open
Abstract
Modern human society is burdened with the pandemic of cardiovascular and metabolic diseases. Metrnl is a widely distributed secreted protein in the body, involved in regulating glucose and lipid metabolism and maintaining cardiovascular system homeostasis. In this review, we present the predictive and therapeutic roles of Metrnl in various cardiovascular and metabolic diseases, including atherosclerosis, ischemic heart disease, cardiac remodeling, heart failure, hypertension, chemotherapy-induced myocardial injury, diabetes mellitus, and obesity.
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Affiliation(s)
- Wen-Sheng Dong
- Department of Geriatrics, Hubei Key Laboratory of Metabolic and Chronic Diseases, Renmin Hospital of Wuhan University, Wuhan University at Jiefang Road 238, Wuhan, 430060, China
| | - Can Hu
- Department of Ultrasound, Union Hospital, Tongji Medical College, Clinical Research Center for Medical Imaging in Hubei Province, Hubei Province Key Laboratory of Molecular Imaging, Huazhong University of Science and Technology, Wuhan, Hubei, 430022, China
| | - Min Hu
- Department of Cardiology, Hubei Key Laboratory of Metabolic and Chronic Diseases, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Yi-Peng Gao
- Department of Cardiology, Hubei Key Laboratory of Metabolic and Chronic Diseases, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Yu-Xin Hu
- Department of Geriatrics, Hubei Key Laboratory of Metabolic and Chronic Diseases, Renmin Hospital of Wuhan University, Wuhan University at Jiefang Road 238, Wuhan, 430060, China
| | - Kang Li
- Department of Geriatrics, Hubei Key Laboratory of Metabolic and Chronic Diseases, Renmin Hospital of Wuhan University, Wuhan University at Jiefang Road 238, Wuhan, 430060, China
| | - Yun-Jia Ye
- Department of Geriatrics, Hubei Key Laboratory of Metabolic and Chronic Diseases, Renmin Hospital of Wuhan University, Wuhan University at Jiefang Road 238, Wuhan, 430060, China
| | - Xin Zhang
- Department of Geriatrics, Hubei Key Laboratory of Metabolic and Chronic Diseases, Renmin Hospital of Wuhan University, Wuhan University at Jiefang Road 238, Wuhan, 430060, China.
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Maylem ERS, Schütz LF, Spicer LJ. The role of asprosin in regulating ovarian granulosa- and theca-cell steroidogenesis: a review with comparisons to other adipokines. Reprod Fertil Dev 2024; 36:RD24027. [PMID: 39074236 DOI: 10.1071/rd24027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 07/04/2024] [Indexed: 07/31/2024] Open
Abstract
Adipose tissues produce a variety of biologically active compounds, including cytokines, growth factors and adipokines. Adipokines are important as they function as endocrine hormones that are related to various metabolic and reproductive diseases. The goal of this review was to summarise the role of asprosin, a recently discovered adipokine, and compare its role in ovarian steroidogenesis with that of other adipokines including adiponectin, leptin, resistin, apelin, visfatin, chemerin, irisin, and gremlin 1. The summary of concentrations of these adipokines in humans, rats and other animals will help researchers identify appropriate doses to test in future studies. Review of the literature indicated that asprosin increases androstenedione production in theca cells (Tc), and when cotreated with FSH increases oestradiol production in granulosa cells (Gc). In comparison, other adipokines (1) stimulate Gc oestradiol production but inhibit Tc androgen production (adiponectin), (2) inhibit Gc oestradiol production and Tc androstenedione production (leptin and chemerin), (3) inhibit Gc steroidogenesis with no effect on Tc (resistin), (4) inhibit Gc oestradiol production but stimulate Tc androgen production (gremlin 1), and (5) increase steroid secretion by Gc, with unknown effects on Tc steroidogenesis (apelin and visfatin). Irisin has direct effects on Gc but its precise role (inhibitory or stimulatory) may be species dependent and its effects on Tc will require additional research. Thus, most adipokines have direct effects (either positive or negative) on steroid production in ovarian cells, but how they all work together to create a cumulative effect or disease will require further research.
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Affiliation(s)
- Excel Rio S Maylem
- Philippine Carabao Center, National Headquarters and Gene Pool, Science City of Munoz, Nueva Ecija, Philippines
| | - Luis Fernando Schütz
- Department of Agriculture, Veterinary and Rangeland Sciences, University of Nevada, Reno, NV 89557, USA
| | - Leon J Spicer
- Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK 74078, USA
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Radikova Z, Mosna L, Eckerstorfer C, Bajer B, Havranova A, Imrich R, Vlcek M, Penesova A. Plasma irisin and the brain-derived neurotrophic factor levels in sedentary subjects: effect of 8-weeks lifestyle intervention. Endocr Regul 2024; 58:115-128. [PMID: 38861537 DOI: 10.2478/enr-2024-0013] [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] [Indexed: 06/13/2024] Open
Abstract
Objectives. Sedentary lifestyle increasingly observed in the population contributes to the incremental incidence of obesity, cardiovascular diseases, mental disorders, type 2 diabetes, hyper-tension, dyslipidemia, and others. Physical inactivity together with an imbalance in caloric intake and expenditure leads to a loss of muscle mass, reduced insulin sensitivity, and accumulation of the visceral fat. Organokines (adipokines, myokines, hepatokines, etc.) serve in the organism for inter-organ communication. However, human studies focused on the exercise-related changes in plasma levels of certain myokines have produced contradictory results. In the present study, we verified a hypothesis that myokine irisin, which is expected to increase in response to physical activity, induces brain-derived neurotrophic factor (BDNF) production and by this way mediates the beneficial effect of exercise on several brain functions. Subjects and Methods. Women (n=27) and men (n=10) aged 44.5±12.0 years, who were sedentary and overweight/obese (men ≥25%, women ≥28% body fat), participated in the study. The effect of an 8-week intensive lifestyle intervention (150 minutes of moderate physical activity per week, diet modification, and reduction of caloric intake) on the selected organokines (irisin, BDNF) in the context of an expected improvement in cardiometabolic status was examined. Results. The 8-week lifestyle intervention resulted in a significant (p<0.05) reduction in body mass index, body fat, blood pressure, insulin resistance, lipid and liver parameters, and irisin levels (p<0.001). However, BDNF increase in the whole group did not reach statistical significance. After the improvement of cardiometabolic parameters, a significant decrease in irisin and increase in BDNF levels were also observed in the subgroup with unsatisfactory (≤5%) body weight reduction. Neither relationship between irisin and BDNF levels, nor effect of age or sex on their levels was observed. Conclusions. We cannot confirm the hypothesis that exercise-induced irisin may increase the BDNF levels, whereas, the organokine levels in the periphery may not completely reflect the processes in the brain compartments. The observed decrease in irisin levels after 8-week intensive lifestyle intervention program, which was in contrary to its supposed mechanisms of action and dynamics, suggests the presence of several yet undiscovered impacts on the secretion of irisin.
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Affiliation(s)
- Zofia Radikova
- 1Institute of Clinical and Translational Research, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
- 2Faculty of Medicine, Slovak Medical University in Bratislava, Bratislava, Slovakia
| | - Lucia Mosna
- 1Institute of Clinical and Translational Research, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Carmen Eckerstorfer
- 2Faculty of Medicine, Slovak Medical University in Bratislava, Bratislava, Slovakia
| | - Boris Bajer
- 1Institute of Clinical and Translational Research, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Andrea Havranova
- 1Institute of Clinical and Translational Research, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Richard Imrich
- 1Institute of Clinical and Translational Research, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
- 3Institute of Physiology, Faculty of Medicine, Comenius University, Bratislava, Slovakia
| | - Miroslav Vlcek
- 1Institute of Clinical and Translational Research, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
- 2Faculty of Medicine, Slovak Medical University in Bratislava, Bratislava, Slovakia
| | - Adela Penesova
- 1Institute of Clinical and Translational Research, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
- 4Department of Biological and Medical Science, Faculty of Physical Education and Sport, Comenius University in Bratislava, Bratislava, Slovakia
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Esin K, Batirel S, Ülfer G, Yigit P, Sanlier N. Association of Serum Irisin Levels with Body Composition, Metabolic Profile, Leptin, and Adiponectin Levels in Lean and Obese Children. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1954. [PMID: 38004003 PMCID: PMC10673282 DOI: 10.3390/medicina59111954] [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: 09/20/2023] [Revised: 10/25/2023] [Accepted: 10/31/2023] [Indexed: 11/26/2023]
Abstract
Background and Objectives: Irisin is an adipo-myokine with potential metabolic effects in the body, and its association with childhood obesity is still controversial. This study aimed to investigate the relationship between serum irisin levels and anthropometric parameters, body composition, metabolic profiles, leptin, and adiponectin in obese and normal-weight children. Methods: The study sample consisted of a total of 80 children aged 6-10, including 44 obese children (BMI ≥ 97th percentile) and 36 normal-weight children. Anthropometric parameters were measured. Body composition was determined with the use of the Bioelectrical Impedance Analysis (BIA) method. Metabolic profiles, as well as irisin, leptin, and adiponectin levels, were analyzed. Results: Anthropometric parameters and body composition were found to be significantly different between the obese and normal-weight groups (p < 0.05). Fasting blood glucose, insulin, HOMA-IR, and leptin levels were found to be significantly higher in the obese group, while the normal-weight group had significantly higher HDL cholesterol and adiponectin levels (p < 0.05). Serum irisin levels did not differ between the obese and normal-weight groups, or based on sex, vitamin D levels, and insulin resistance status. There was also no statistically significant correlation between serum irisin levels and anthropometric parameters, metabolic profile, leptin, and adiponectin. Conclusions: The study concluded that the obese children who participated in this study had high leptin levels and low adiponectin levels, with no significant difference in the irisin levels between the groups. More comprehensive clinical studies are needed to investigate the relationship between irisin and adipokines in children.
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Affiliation(s)
- Kübra Esin
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Tokat Gaziosmanpaşa University, Tokat 60250, Türkiye
| | - Saime Batirel
- Department of Medical Biochemistry, Faculty of Medicine, Marmara University, Istanbul 34722, Türkiye;
| | - Gözde Ülfer
- Department of Medical Biochemistry, Faculty of Medicine, Istanbul Medipol University, Istanbul 34214, Türkiye;
| | - Pakize Yigit
- Department of Statistical Analysis and Applications, Faculty of Medicine, Istanbul Medipol University, Istanbul 34810, Türkiye;
| | - Nevin Sanlier
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Ankara Medipol University, Ankara 06050, Türkiye;
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Öztürk NK, Çiçek B, Tekin T, Güntürk İ, Yazıcı C, Karaca Z, Sönmez M. Serum visfatin levels are positively correlated with dietary carbohydrate and polyunsaturated fatty acid intakes in type 2 diabetes mellitus patients. J Diabetes Complications 2023; 37:108550. [PMID: 37364350 DOI: 10.1016/j.jdiacomp.2023.108550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/23/2023] [Accepted: 06/14/2023] [Indexed: 06/28/2023]
Affiliation(s)
- Nurefşan Konyalıgil Öztürk
- Bolu Abant İzzet Baysal University, Faculty of Health Sciences, Department of Nutrition and Dietetics, Bolu, Turkey.
| | - Betül Çiçek
- Erciyes University, Faculty of Health Sciences, Department of Nutrition and Dietetics, Kayseri, Turkey.
| | - Tuba Tekin
- Sivas Cumhuriyet University, Faculty of Health Sciences, Department of Nutrition and Dietetics, Sivas, Turkey.
| | - İnayet Güntürk
- Niğde Ömer Halisdemir University, Faculty of Health Sciences, Department of Midwifery, Niğde, Turkey.
| | - Cevat Yazıcı
- Erciyes University, Faculty of Medicine, Department of Biochemistry and Clinical Biochemistry, Kayseri, Turkey.
| | - Züleyha Karaca
- Erciyes University, Faculty of Medicine, Department of Endocrinology & Metabolism, Kayseri, Turkey.
| | - Meltem Sönmez
- Erciyes University, Faculty of Medicine, Department of Biostatistics, Kayseri, Turkey.
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Li Z, Gao Z, Sun T, Zhang S, Yang S, Zheng M, Shen H. Meteorin-like/Metrnl, a novel secreted protein implicated in inflammation, immunology, and metabolism: A comprehensive review of preclinical and clinical studies. Front Immunol 2023; 14:1098570. [PMID: 36911663 PMCID: PMC9998503 DOI: 10.3389/fimmu.2023.1098570] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 02/10/2023] [Indexed: 02/26/2023] Open
Abstract
Meteorin-like, also known as Metrnl, Meteorin-β, Subfatin, and Cometin, is a novel secreted protein exerting pleiotropic effects on inflammation, immunology, and metabolism. Earlier research on this hormone focused on regulating energy expenditure and glucose homeostasis. Consequently, several studies attempted to characterize the molecule mechanism of Metrnl in glucose metabolism and obesity-related disorders but reported contradictory clinical results. Recent studies gradually noticed its multiple protective functions in inflammatory immune regulations and cardiometabolic diseases, such as inducing macrophage activation, angiogenesis, tissue remodeling, bone formation, and preventing dyslipidemias. A comprehensive understanding of this novel protein is essential to identify its significance as a potential therapeutic drug or a biomarker of certain diseases. In this review, we present the current knowledge on the physiology of Metrnl and its roles in inflammation, immunology, and metabolism, including animal/cell interventional preclinical studies and human clinical studies. We also describe controversies regarding the data of circulation Metrnl in different disease states to determine its clinical application better.
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Affiliation(s)
- Zhuoqi Li
- Department of Rheumatology and Immunology, The First Hospital of China Medical University, China Medical University, Shen Yang, China
| | - Ziyu Gao
- Department of Thyroid Surgery, The First Hospital of China Medical University, China Medical University, Shen Yang, China
| | - Tao Sun
- Department of Rheumatology and Immunology, The First Hospital of China Medical University, China Medical University, Shen Yang, China
| | - Shipeng Zhang
- Department of Rheumatology and Immunology, The First Hospital of China Medical University, China Medical University, Shen Yang, China
| | - Shengnan Yang
- Department of Rheumatology and Immunology, The First Hospital of China Medical University, China Medical University, Shen Yang, China
| | - Meilin Zheng
- Department of Rheumatology and Immunology, The First Hospital of China Medical University, China Medical University, Shen Yang, China
| | - Hui Shen
- Department of Rheumatology and Immunology, The First Hospital of China Medical University, China Medical University, Shen Yang, China
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Plasma FGF21 Levels Are Not Associated with Weight Loss or Improvements in Metabolic Health Markers upon 12 Weeks of Energy Restriction: Secondary Analysis of an RCT. Nutrients 2022; 14:nu14235061. [PMID: 36501091 PMCID: PMC9735516 DOI: 10.3390/nu14235061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/27/2022] [Accepted: 11/18/2022] [Indexed: 11/29/2022] Open
Abstract
Recent studies suggest that circulating fibroblast growth factor 21 (FGF21) may be a marker of metabolic health status. We performed a secondary analysis of a 12-week randomized controlled trial to investigate the effects of two energy restriction (ER) diets on fasting and postprandial plasma FGF21 levels, as well as to explore correlations of plasma FGF21 with metabolic health markers, (macro)nutrient intake and sweet-taste preference. Abdominally obese subjects aged 40-70 years (n = 110) were randomized to one of two 25% ER diets (high-nutrient-quality diet or low-nutrient-quality diet) or a control group. Plasma FGF21 was measured in the fasting state and 120 min after a mixed meal. Both ER diets did not affect fasting or postprandial plasma FGF21 levels despite weight loss and accompanying health improvements. At baseline, the postprandial FGF21 response was inversely correlated to fasting plasma glucose (ρ = -0.24, p = 0.020) and insulin (ρ = -0.32, p = 0.001), HOMA-IR (ρ = -0.34, p = 0.001), visceral adipose tissue (ρ = -0.24, p = 0.046), and the liver enzyme aspartate aminotransferase (ρ = -0.23, p = 0.021). Diet-induced changes in these markers did not correlate to changes in plasma FGF21 levels upon intervention. Baseline higher habitual polysaccharide intake, but not mono- and disaccharide intake or sweet-taste preference, was related to lower fasting plasma FGF21 (p = 0.022). In conclusion, we found no clear evidence that fasting plasma FGF21 is a marker for metabolic health status. Circulating FGF21 dynamics in response to an acute nutritional challenge may reflect metabolic health status better than fasting levels.
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Porflitt-Rodríguez M, Guzmán-Arriagada V, Sandoval-Valderrama R, Tam CS, Pavicic F, Ehrenfeld P, Martínez-Huenchullán S. Effects of aerobic exercise on fibroblast growth factor 21 in overweight and obesity. A systematic review. Metabolism 2022; 129:155137. [PMID: 35038422 DOI: 10.1016/j.metabol.2022.155137] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 01/06/2022] [Accepted: 01/10/2022] [Indexed: 12/20/2022]
Abstract
Fibroblast growth factor 21 (FGF21) has been suggested to improve metabolism during aerobic exercise in obesity. However, the variability of exercise interventions gives rise to discrepancies in the field. Therefore, we aimed to systematically review the available literature regarding the effects of aerobic exercise on FGF21 in the context of overweight and obesity. Our search included original articles published between 2009 and November 2021 found in PubMed, Science Direct, and Medline. Clinical and preclinical studies were included. Studies, where subjects or animals presented with other conditions (e.g., cancer, stroke), were excluded. From an initial 43 studies, 19 (clinical studies = 9; preclinical studies = 10) were eligible for inclusion in this review. The main findings were that acute exercise tended to increase circulatory levels of FGF21. In contrast, chronic exercise programs (≥4 weeks) had the opposite effect along with inducing mRNA and protein increases of FGF receptors and β-klotho in adipose tissue, liver, and skeletal muscle. In conclusion, both clinical and preclinical studies showed that aerobic exercise exerts changes in circulatory and tissue FGF21, along with its receptors and co-receptor. Future research is needed to elucidate the mechanisms, along with the physiological and clinical implications of these changes.
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Affiliation(s)
| | | | | | - Charmaine S Tam
- Faculty of Medicine and Health, University of Sydney, Sydney, Australia
| | - Francisca Pavicic
- Laboratory of Cellular Pathology, Institute of Anatomy, Histology & Pathology, Faculty of Medicine, Universidad Austral de Chile, Valdivia, Chile
| | - Pamela Ehrenfeld
- Laboratory of Cellular Pathology, Institute of Anatomy, Histology & Pathology, Faculty of Medicine, Universidad Austral de Chile, Valdivia, Chile; Centro Interdisciplinario de Estudios del Sistema Nervioso (CISNe), Chile
| | - Sergio Martínez-Huenchullán
- Centro Interdisciplinario de Estudios del Sistema Nervioso (CISNe), Chile; Locomotor Apparatus and Rehabilitation Institute, Faculty of Medicine, Universidad Austral de Chile, Valdivia, Chile; Cardiorespiratory and Metabolic Function Laboratory - Neyün, Faculty of Medicine, Universidad Austral de Chile, Valdivia, Chile.
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Serum irisin levels in newly diagnosed type-II diabetic patients: No association with the overall diet quality but strong association with fruit intake. Clin Nutr ESPEN 2022; 49:357-364. [DOI: 10.1016/j.clnesp.2022.03.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 03/05/2022] [Accepted: 03/15/2022] [Indexed: 11/18/2022]
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Liu X, Zhang Y, Ma C, Lin J, Du J. Alternate-day fasting alleviates high fat diet induced non-alcoholic fatty liver disease through controlling PPARα/Fgf21 signaling. Mol Biol Rep 2022; 49:3113-3122. [PMID: 35107741 DOI: 10.1007/s11033-022-07142-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 01/11/2022] [Indexed: 12/27/2022]
Abstract
BACKGROUND Nonalcoholic fatty liver disease (NAFLD) is a common chronic liver disease that ultimately leads to cirrhosis and hepatocellular carcinoma. Intermittent fasting has been proposed as a nonpharmacological dietary approach against metabolic diseases, including NAFLD. In this study, we aimed to investigate the effect of alternate day fasting (ADF) on high-fat diet (HFD)-induced NAFLD in C57BL/6 mice. METHODS A mouse model of fatty liver disease was established by feeding the mice a HFD for 16 weeks. The mice were administered by body weight, lipid accumulation and inflammation. PPARα, FGF21, serum triglycerides (TG), total cholesterol (TC), transaminase and lipogenesis were assessed. RESULTS The results showed that long-term ADF can attenuate fatty liver disease by reducing hepatic inflammation and lipid accumulation in a mouse model. Meanwhile, fasting elevated the expression of serum and hepatic fibroblast growth Factor 21 (Fgf21), a circulating hormone produced predominantly in the liver, and could effectively prevent and ameliorate the pathogenesis of NAFLD. Serum starvation also enhanced Fgf21 expression and reduced free fatty acid (FFA)-induced lipid storage in hepatocytes. Moreover, refeeding inhibited the increase in Fgf21 expression induced by fasting. This fasted-to-refed transition is closely related to the expression of Fgf21. Further in vitro and in vivo studies showed that fasting-sensitive PPARα is indispensable for the expression of Fgf21 and its protective effect on NAFLD. CONCLUSION These findings indicated that long-term ADF protects mouse livers against HFD induced fatty liver disease through controlling PPARα/Fgf21 signaling. In conclusion, ADF can emerge as a non-pharmacological dietary approach against fatty liver disease.
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Affiliation(s)
- Xinlei Liu
- Stem Cell and Biotherapy Engineering Research Center of Henan, College of Medical Engineering, Xinxiang Medical University, East of JinSui Road #601, Xinxiang City, 453003, Henan Province, China.,Henan Joint International Research Laboratory of Stem Cell Medicine, Xinxiang Medical University, Xinxiang, 453003, China
| | - Yan Zhang
- Stem Cell and Biotherapy Engineering Research Center of Henan, College of Medical Engineering, Xinxiang Medical University, East of JinSui Road #601, Xinxiang City, 453003, Henan Province, China.,Henan Joint International Research Laboratory of Stem Cell Medicine, Xinxiang Medical University, Xinxiang, 453003, China
| | - Chunya Ma
- Stem Cell and Biotherapy Engineering Research Center of Henan, College of Medical Engineering, Xinxiang Medical University, East of JinSui Road #601, Xinxiang City, 453003, Henan Province, China.,Henan Joint International Research Laboratory of Stem Cell Medicine, Xinxiang Medical University, Xinxiang, 453003, China
| | - Juntang Lin
- Stem Cell and Biotherapy Engineering Research Center of Henan, College of Medical Engineering, Xinxiang Medical University, East of JinSui Road #601, Xinxiang City, 453003, Henan Province, China. .,Henan Joint International Research Laboratory of Stem Cell Medicine, Xinxiang Medical University, Xinxiang, 453003, China.
| | - Jiang Du
- Stem Cell and Biotherapy Engineering Research Center of Henan, College of Medical Engineering, Xinxiang Medical University, East of JinSui Road #601, Xinxiang City, 453003, Henan Province, China. .,Henan Joint International Research Laboratory of Stem Cell Medicine, Xinxiang Medical University, Xinxiang, 453003, China.
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Circulating fibroblast growth factor 21 links hemodynamics with kidney function in middle-aged and older adults: A mediation analysis. Hypertens Res 2022; 45:125-134. [PMID: 34690353 DOI: 10.1038/s41440-021-00782-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 09/08/2021] [Accepted: 09/14/2021] [Indexed: 02/08/2023]
Abstract
Altered hemodynamics are commonly observed in individuals with declining renal function; however, the pathophysiological mechanisms linking renal dysfunction and hemodynamics have not been fully elucidated. Fibroblast growth factor 21 (FGF21), which upregulates sympathetic nerve activity, can alter systemic hemodynamics, and its level can increase as renal function declines. This study aimed to determine the associations among circulating FGF21 levels, hemodynamics, and renal function in middle-aged and older adults. In a total of 272 middle-aged and older adults (age range: 46-83 years), estimated glomerular filtration rate (eGFR), hemodynamics (brachial and aortic blood pressure and aortic pulse wave velocity [PWV]), and serum FGF21 levels were measured. For mediation analysis, hemodynamic parameters were entered as outcomes. eGFR or log-transformed urinary albumin and creatinine ratio (UACR) and log-transformed serum FGF21 levels were set as the predictors and mediator, respectively. According to multivariable regression models after adjusting for potential covariates, serum FGF21 levels were significantly associated with brachial systolic blood pressure (β = 0.140), pulse pressure (β = 0.136), and aortic PWV (β = 0.144). Mediation analyses showed that serum FGF21 levels significantly mediated the relationship of eGFR with brachial systolic blood pressure (indirect effect [95% confidence interval]: -0.032 [-0.071, -0.002]), pulse pressure (-0.019 [-0.041, -0.001]), and aortic PWV (-0.457 [-1.053, -0.021]) and the relationship of UACR with aortic PWV (7.600 [0.011, 21.148]). These findings suggest that elevated circulating FGF21 levels partially mediate the association of elevated blood pressure and/or aortic stiffness with renal dysfunction in middle-aged and older adults.
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Exercise Inhibits NLRP3 Inflammasome Activation in Obese Mice via the Anti-Inflammatory Effect of Meteorin-like. Cells 2021; 10:cells10123480. [PMID: 34943988 PMCID: PMC8700724 DOI: 10.3390/cells10123480] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/19/2021] [Accepted: 12/06/2021] [Indexed: 12/11/2022] Open
Abstract
Obesity is associated with chronic low-grade inflammation. The benefits of exercise are partly attributed to its anti-inflammatory effect, but whether exercise can regulate NLRP3 inflammasome activation in obese adipose tissue remains unknown. Meteorin-like (METRNL), a recently discovered myokine, has been implicated in mediating the effect of exercise on metabolism. Herein, we examined the effect of exercise and METRNL on NLRP3 inflammasome activation. High-fat diet (HFD)-induced obese mice were subjected to treadmill exercise for 8 weeks. A subgroup of HFD mice was switched to normal chow with the exercise intervention. Exercise and diet attenuated weight gain, fat accumulation, and insulin resistance in obese mice. In addition, exercise downregulated gene and protein levels of inflammasome markers, including NLRP3 and caspase-1, in adipose tissue. In isolated bone marrow-derived macrophages, activation of NLRP3 inflammasome was suppressed in the exercise group, as confirmed by the downregulation of IL-1β and IL-18. Exercise significantly enhanced the expression of METRNL in various muscle depots, and further in vitro analysis revealed that recombinant METRNL treatment inhibited IL-1β secretion in macrophages. In conclusion, exercise exerts its anti-inflammatory action by suppressing adipose tissue NLRP3 inflammasome, and this is, in part, associated with METRNL induction in muscle and its anti-inflammatory effects in macrophages.
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Evidence of a Muscle-Brain Axis by Quantification of the Neurotrophic Myokine METRNL (Meteorin-Like Protein) in Human Cerebrospinal Fluid and Serum. J Clin Med 2021; 10:jcm10153271. [PMID: 34362056 PMCID: PMC8347672 DOI: 10.3390/jcm10153271] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 07/06/2021] [Accepted: 07/19/2021] [Indexed: 01/15/2023] Open
Abstract
Data on the quantification of the potentially neurotrophic adipo-myokine METRNL (Meteorin-like protein) in human cerebrospinal fluid (CSF) are lacking and migration of this secreted protein across the blood–brain barrier (BBB) is uncertain. In the present pilot study, METRNL concentrations were quantified by ELISA in paired serum and CSF samples of 260 patients (107 males, 153 females) undergoing neurological evaluation. METRNL was abundant in serum (801.2 ± 378.3 pg/mL) and CSF (1007.2 ± 624.2 pg/mL) with a CSF/serum ratio of 1.4 ± 0.8. Serum METRNL levels were significantly correlated (rho = +0.521) to those in CSF. CSF METRNL concentrations were significantly correlated (rho = +0.480) with albumin CSF/serum ratios. The CSF/serum ratios of METRNL and albumin were positively correlated in Reibergram analysis (rho = 0.498), indicating that raising CSF concentrations of METRNL are mediated by increasing BBB dysfunction. The CSF concentrations of METRNL strongly increased in a stepwise manner along with increasing BBB dysfunction from grade 0 to grade 3 and with rising CSF cell count. CSF/serum ratio of METRNL also increased from grade 0 (1.2 ± 0.7) to grade 3 (3.0 ± 0.2). Furthermore, CSF levels were positively correlated with age. In conclusion, METRNL is a secreted and neurotrophic myokine that crosses over the BBB. CSF concentrations of METRNL increase with BBB dysfunction.
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Spann RA, Morrison CD, den Hartigh LJ. The Nuanced Metabolic Functions of Endogenous FGF21 Depend on the Nature of the Stimulus, Tissue Source, and Experimental Model. Front Endocrinol (Lausanne) 2021; 12:802541. [PMID: 35046901 PMCID: PMC8761941 DOI: 10.3389/fendo.2021.802541] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 12/09/2021] [Indexed: 01/13/2023] Open
Abstract
Fibroblast growth factor 21 (FGF21) is a hormone that is involved in the regulation of lipid, glucose, and energy metabolism. Pharmacological FGF21 administration promotes weight loss and improves insulin sensitivity in rodents, non-human primates, and humans. However, pharmacologic effects of FGF21 likely differ from its physiological effects. Endogenous FGF21 is produced by many cell types, including hepatocytes, white and brown adipocytes, skeletal and cardiac myocytes, and pancreatic beta cells, and acts on a diverse array of effector tissues such as the brain, white and brown adipose tissue, heart, and skeletal muscle. Different receptor expression patterns dictate FGF21 function in these target tissues, with the primary effect to coordinate responses to nutritional stress. Moreover, different nutritional stimuli tend to promote FGF21 expression from different tissues; i.e., fasting induces hepatic-derived FGF21, while feeding promotes white adipocyte-derived FGF21. Target tissue effects of FGF21 also depend on its capacity to enter the systemic circulation, which varies widely from known FGF21 tissue sources in response to various stimuli. Due to its association with obesity and non-alcoholic fatty liver disease, the metabolic effects of endogenously produced FGF21 during the pathogenesis of these conditions are not well known. In this review, we will highlight what is known about endogenous tissue-specific FGF21 expression and organ cross-talk that dictate its diverse physiological functions, with particular attention given to FGF21 responses to nutritional stress. The importance of the particular experimental design, cellular and animal models, and nutritional status in deciphering the diverse metabolic functions of endogenous FGF21 cannot be overstated.
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Affiliation(s)
- Redin A. Spann
- Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, United States
| | - Christopher D. Morrison
- Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, United States
| | - Laura J. den Hartigh
- Department of Medicine, Division of Metabolism, Endocrinology and Nutrition, University of Washington, Seattle, WA, United States
- Diabetes Institute, University of Washington, Seattle, WA, United States
- *Correspondence: Laura J. den Hartigh,
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