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Zhong H, Zhang X, Wu Y, Li L, Zhang Z, Chi X, Cui X, Ji C. The dairy-derived peptide Miltin exerts anti-obesity effects by increasing adipocyte thermogenesis. Food Funct 2024; 15:5300-5314. [PMID: 38669145 DOI: 10.1039/d3fo05704f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2024]
Abstract
Growing research has highlighted that the consumption of dairy products improves the metabolic health in obese individuals by functioning as regulatory modulators. However, the molecular basis of this effect remains largely unknown. Herein, we report a dairy-derived peptide, which we named Miltin, that activates the thermogenesis of brown adipocytes and increases white adipocyte browning. Previously, Miltin was merely identified for its antioxidant capacity, although it is commonly present in different dairy products. In this study, we revealed the effect of Miltin in modulating adipose thermogenesis and further explored its potential in treating obesity through in vivo and in vitro strategies. The administration of Miltin in mice fed with a high-fat diet resulted in enhanced thermogenesis, improved glucose homeostasis, and reduced body mass and lipid accumulation, indicating the anti-obesity effect of Miltin. Genomic analysis revealed that Miltin modulates thermogenesis by inducing the activation of the MAPK signaling pathway by preferentially interacting with GADD45γ to promote its stability. Together, our findings indicate that Miltin's role in initiating the thermogenesis of adipocytes makes it a potential anti-obesity therapy for future development.
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Affiliation(s)
- Hong Zhong
- Nanjing Maternal and Child Health Institute, Women's Hospital of Nanjing Medical University, Nanjing Women and Children's Healthcare Hospital, 123 Tianfei Alley, Mochou Road, Nanjing, China.
| | - Xiaoxiao Zhang
- Nanjing Maternal and Child Health Institute, Women's Hospital of Nanjing Medical University, Nanjing Women and Children's Healthcare Hospital, 123 Tianfei Alley, Mochou Road, Nanjing, China.
| | - Yangyang Wu
- Nanjing Maternal and Child Health Institute, Women's Hospital of Nanjing Medical University, Nanjing Women and Children's Healthcare Hospital, 123 Tianfei Alley, Mochou Road, Nanjing, China.
| | - Lu Li
- Nanjing Maternal and Child Health Institute, Women's Hospital of Nanjing Medical University, Nanjing Women and Children's Healthcare Hospital, 123 Tianfei Alley, Mochou Road, Nanjing, China.
| | - Zhuo Zhang
- Nanjing Maternal and Child Health Institute, Women's Hospital of Nanjing Medical University, Nanjing Women and Children's Healthcare Hospital, 123 Tianfei Alley, Mochou Road, Nanjing, China.
| | - Xia Chi
- Nanjing Maternal and Child Health Institute, Women's Hospital of Nanjing Medical University, Nanjing Women and Children's Healthcare Hospital, 123 Tianfei Alley, Mochou Road, Nanjing, China.
| | - Xianwei Cui
- Nanjing Maternal and Child Health Institute, Women's Hospital of Nanjing Medical University, Nanjing Women and Children's Healthcare Hospital, 123 Tianfei Alley, Mochou Road, Nanjing, China.
| | - Chenbo Ji
- Nanjing Maternal and Child Health Institute, Women's Hospital of Nanjing Medical University, Nanjing Women and Children's Healthcare Hospital, 123 Tianfei Alley, Mochou Road, Nanjing, China.
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Li B, Zhang B, Zhang F, Liu X, Zhang Y, Peng W, Teng D, Mao R, Yang N, Hao Y, Wang J. Interaction between Dietary Lactoferrin and Gut Microbiota in Host Health. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:7596-7606. [PMID: 38557058 DOI: 10.1021/acs.jafc.3c09050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
The gut microbiota are known to play an important role in host health and disease. Alterations in the gut microbiota composition can disrupt the stability of the gut ecosystem, which may result in noncommunicable chronic diseases (NCCDs). Remodeling the gut microbiota through personalized nutrition is a novel therapeutic avenue for both disease control and prevention. However, whether there are commonly used gut microbiota-targeted diets and how gut microbiota-diet interactions combat NCCDs and improve health remain questions to be addressed. Lactoferrin (LF), which is broadly used in dietary supplements, acts not only as an antimicrobial in the defense against enteropathogenic bacteria but also as a prebiotic to propagate certain probiotics. Thus, LF-induced gut microbiota alterations can be harnessed to induce changes in host physiology, and the underpinnings of their relationships and mechanisms are beginning to unravel in studies involving humans and animal models.
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Affiliation(s)
- Bing Li
- Institute of Translational Medicine, College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou 466001, Henan, PR China
| | - Bo Zhang
- International Joint Research Laboratory for Biomedical Nanomaterials of Henan, Zhoukou Normal University, Zhoukou 466001, Henan, PR China
| | - Fuli Zhang
- Institute of Translational Medicine, College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou 466001, Henan, PR China
| | - Xiaomeng Liu
- Institute of Translational Medicine, College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou 466001, Henan, PR China
| | - Yunxia Zhang
- Institute of Translational Medicine, College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou 466001, Henan, PR China
| | - Weifeng Peng
- Institute of Translational Medicine, College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou 466001, Henan, PR China
| | - Da Teng
- Gene Engineering Lab, Feed Research Institute, Chinese Academy of Agricultural Science, Beijing 100081, P. R. China
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing 100081, P. R. China
| | - Ruoyu Mao
- Gene Engineering Lab, Feed Research Institute, Chinese Academy of Agricultural Science, Beijing 100081, P. R. China
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing 100081, P. R. China
| | - Na Yang
- Gene Engineering Lab, Feed Research Institute, Chinese Academy of Agricultural Science, Beijing 100081, P. R. China
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing 100081, P. R. China
| | - Ya Hao
- Gene Engineering Lab, Feed Research Institute, Chinese Academy of Agricultural Science, Beijing 100081, P. R. China
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing 100081, P. R. China
| | - Jianhua Wang
- Gene Engineering Lab, Feed Research Institute, Chinese Academy of Agricultural Science, Beijing 100081, P. R. China
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing 100081, P. R. China
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Chen C, Yan Y, Wu Y, Lu M, Xing Y, Bai Y, Zhao H, Ding L, Wu Y, Xu J, Qin L, Lv H, Zhang Z. Lactoferrin ameliorated obesity-induced endothelial dysfunction by inhibiting the Tak1/IL-18/eNOS pathway between PVAT and vascular endothelium. Free Radic Biol Med 2024; 212:309-321. [PMID: 38159893 DOI: 10.1016/j.freeradbiomed.2023.12.036] [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: 12/01/2023] [Revised: 12/21/2023] [Accepted: 12/25/2023] [Indexed: 01/03/2024]
Abstract
Vascular endothelial dysfunction (ED) is one of the mechanisms underlying obesity-related hypertension. Perivascular adipose tissue (PVAT) surrounds blood vessels and influences the vascular endothelium function. Previous studies have demonstrated the antihypertensive effects of lactoferrin (LF) and its hydrolysates through various mechanisms. However, the effect of LF on ED and PVAT has not yet been investigated. In this study, we examined the influence of LF on ED and PVAT using high-fat diet mice as well as MAEC cells and 3T3-L1 adipocytes. Finally, LF supplementation decreases the systolic blood pressure (SBP), serum adhesion molecule (ICAM-1 and VCAM-1), and aorta ROS levels, and improves endothelium-dependent relaxation function in high-fat diet mice. Moreover, LF supplementation down-regulates the Tak1/IL-18/eNOS pathway between PVAT and aorta and enhances the NO generation in high-fat diet mice. In addition, we observe that LF decreases the expression levels of IL-18 and p-Tak1 in 3T3-L1 adipocytes, but fails to influence the eNOS and p-eNOS expression levels in MAEC cells. Finally, the significant associations between LF and IL-18 and SBP and hypertension risk are also observed in obesity children only. These findings provide evidence that the Tak1/IL-18/eNOS pathway between the aorta and PVAT is important in obesity-related ED, and LF may improve ED or even hypertension by down-regulating this pathway.
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Affiliation(s)
- Cailong Chen
- Center of Child Health Management, Children's Hospital of Soochow University, Suzhou, 215025, China; Department of Nutrition and Food Hygiene, School of Public Health, Soochow University, 199 Renai Road, Suzhou, 215123, China
| | - Yilin Yan
- Department of Nutrition and Food Hygiene, School of Public Health, Soochow University, 199 Renai Road, Suzhou, 215123, China
| | - Yunxuan Wu
- Department of Nutrition and Food Hygiene, School of Public Health, Soochow University, 199 Renai Road, Suzhou, 215123, China
| | - Menglan Lu
- Suzhou Industrial Park Centers for Disease Control and Prevention, 200 Suhong West Road, Suzhou, 215021, China
| | - Yifei Xing
- Department of Nutrition and Food Hygiene, School of Public Health, Soochow University, 199 Renai Road, Suzhou, 215123, China
| | - Yujie Bai
- Department of Nutrition and Food Hygiene, School of Public Health, Soochow University, 199 Renai Road, Suzhou, 215123, China
| | - Haodong Zhao
- Department of Nutrition and Food Hygiene, School of Public Health, Soochow University, 199 Renai Road, Suzhou, 215123, China
| | - Li Ding
- Department of Nutrition and Food Hygiene, School of Public Health, Soochow University, 199 Renai Road, Suzhou, 215123, China
| | - Ying Wu
- Child Healthcare Department, Children's Hospital of Soochow University, Suzhou, 215025, China
| | - Jiaying Xu
- State Key Laboratory of Radiation Medicine and Protection, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, School of Radiation Medicine and Protection, Soochow University, 199 Renai Road, Suzhou, 215123, China
| | - Liqiang Qin
- Department of Nutrition and Food Hygiene, School of Public Health, Soochow University, 199 Renai Road, Suzhou, 215123, China.
| | - Haitao Lv
- Center of Child Health Management, Children's Hospital of Soochow University, Suzhou, 215025, China.
| | - Zheng Zhang
- Center of Child Health Management, Children's Hospital of Soochow University, Suzhou, 215025, China.
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Ianiro G, Niro A, Rosa L, Valenti P, Musci G, Cutone A. To Boost or to Reset: The Role of Lactoferrin in Energy Metabolism. Int J Mol Sci 2023; 24:15925. [PMID: 37958908 PMCID: PMC10650157 DOI: 10.3390/ijms242115925] [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: 10/03/2023] [Revised: 10/25/2023] [Accepted: 10/31/2023] [Indexed: 11/15/2023] Open
Abstract
Many pathological conditions, including obesity, diabetes, hypertension, heart disease, and cancer, are associated with abnormal metabolic states. The progressive loss of metabolic control is commonly characterized by insulin resistance, atherogenic dyslipidemia, inflammation, central obesity, and hypertension, a cluster of metabolic dysregulations usually referred to as the "metabolic syndrome". Recently, nutraceuticals have gained attention for the generalized perception that natural substances may be synonymous with health and balance, thus becoming favorable candidates for the adjuvant treatment of metabolic dysregulations. Among nutraceutical proteins, lactoferrin (Lf), an iron-binding glycoprotein of the innate immune system, has been widely recognized for its multifaceted activities and high tolerance. As this review shows, Lf can exert a dual role in human metabolism, either boosting or resetting it under physiological and pathological conditions, respectively. Lf consumption is safe and is associated with several benefits for human health, including the promotion of oral and gastrointestinal homeostasis, control of glucose and lipid metabolism, reduction of systemic inflammation, and regulation of iron absorption and balance. Overall, Lf can be recommended as a promising natural, completely non-toxic adjuvant for application as a long-term prophylaxis in the therapy for metabolic disorders, such as insulin resistance/type II diabetes and the metabolic syndrome.
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Affiliation(s)
- Giusi Ianiro
- Department of Biosciences and Territory, University of Molise, 86090 Pesche, Italy; (G.I.); (A.N.); (G.M.)
| | - Antonella Niro
- Department of Biosciences and Territory, University of Molise, 86090 Pesche, Italy; (G.I.); (A.N.); (G.M.)
| | - Luigi Rosa
- Department of Public Health and Infectious Diseases, University of Rome La Sapienza, 00185 Rome, Italy; (L.R.); (P.V.)
| | - Piera Valenti
- Department of Public Health and Infectious Diseases, University of Rome La Sapienza, 00185 Rome, Italy; (L.R.); (P.V.)
| | - Giovanni Musci
- Department of Biosciences and Territory, University of Molise, 86090 Pesche, Italy; (G.I.); (A.N.); (G.M.)
| | - Antimo Cutone
- Department of Biosciences and Territory, University of Molise, 86090 Pesche, Italy; (G.I.); (A.N.); (G.M.)
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Omiya K, Nakadate Y, Sato H, Oguchi T, Matsuoka T, Kawakami A, Schricker T, Matsukawa T. Role of the protein kinase A signaling pathway and identification of mediators in the cardioprotective effects of enteral lactoferrin for ischemia-reperfusion injury in an isolated rat heart model. Nutrition 2023; 113:112088. [PMID: 37354654 DOI: 10.1016/j.nut.2023.112088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 05/04/2023] [Accepted: 05/19/2023] [Indexed: 06/26/2023]
Abstract
OBJECTIVE Lactoferrin is an iron-binding glycoprotein. Enteral lactoferrin attenuates myocardial ischemia-reperfusion (IR) injury, but the underlying mechanism remains unknown. The aim of this study was to investigate protein kinase A (PKA) signaling pathway activation and levels of serum glucagonlike peptide-1 (GLP-1), secreted by intestinal endocrine L cells, and adiponectin, secreted by adipose tissue, after enteral lactoferrin administration. METHODS Hearts (N = 32) were excised from Wistar rats and perfused using a Langendorff system. To assess the role of the PKA pathway in the cardioprotective effects of lactoferrin, an inhibitor of PKA (H89) was applied before no-flow ischemia. Rats were randomly divided into four groups: control, lactoferrin (LF), control+H89, and LF+H89. The control and control+H89 groups were administered normal saline by gavage, and the LF and L +H89 groups were administered bovine lactoferrin (1000 mg/kg) by gavage 15 min before intraperitoneal pentobarbital injection. Muscle sampling was performed at the end of reperfusion. When rats were sacrificed, blood was sampled to measure hormone levels. The primary outcome was maximum left ventricular pressure derivative (LV dP/dt max) 15 min after reperfusion. RESULTS LV dP/dt max at 10 and 15 min after reperfusion was significantly higher in the LF group than in the control group (P < 0.05), and the effect was diminished by H89. The PKA pathway was significantly activated in the LF group. Enteral lactoferrin increased serum GLP-1 but not serum adiponectin levels. CONCLUSIONS Enteral lactoferrin induces cardioprotective effects against myocardial IR injury via the PKA signaling pathway and increases serum GLP-1 levels.
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Affiliation(s)
- Keisuke Omiya
- Department of Anesthesiology, University of Yamanashi, Chuo, Yamanashi, Japan.
| | - Yosuke Nakadate
- Department of Anesthesiology, University of Yamanashi, Chuo, Yamanashi, Japan; Department of Anesthesiology, University of Tsukuba Hospital, Tsukuba-City, Ibaraki Japan
| | - Hiroaki Sato
- Department of Anesthesia, McGill University Health Centre Glen Site, Royal Victoria Hospital, Decarie, Montreal QC Canada
| | - Takeshi Oguchi
- Department of Anesthesiology, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Toru Matsuoka
- Department of Anesthesiology, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Akiko Kawakami
- Department of Anesthesiology, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Thomas Schricker
- Department of Anesthesia, McGill University Health Centre Glen Site, Royal Victoria Hospital, Decarie, Montreal QC Canada
| | - Takashi Matsukawa
- Department of Anesthesiology, University of Yamanashi, Chuo, Yamanashi, Japan
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van den Elsen LWJ, Verhasselt V. Human Milk Drives the Intimate Interplay Between Gut Immunity and Adipose Tissue for Healthy Growth. Front Immunol 2021; 12:645415. [PMID: 33912171 PMCID: PMC8071867 DOI: 10.3389/fimmu.2021.645415] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 03/22/2021] [Indexed: 01/04/2023] Open
Abstract
As the physiological food for the developing child, human milk is expected to be the diet that is best adapted for infant growth needs. There is also accumulating evidence that breastfeeding influences long-term metabolic outcomes. This review covers the potential mechanisms by which human milk could regulate healthy growth. We focus on how human milk may act on adipose tissue development and its metabolic homeostasis. We also explore how specific human milk components may influence the interplay between the gut microbiota, gut mucosa immunity and adipose tissue. A deeper understanding of these interactions may lead to new preventative and therapeutic strategies for both undernutrition and other metabolic diseases and deserves further exploration.
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Affiliation(s)
| | - Valerie Verhasselt
- School of Molecular Sciences, The University of Western Australia, Perth, WA, Australia
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Vasilyev V, Sokolov A, Kostevich V, Elizarova A, Gorbunov N, Panasenko O. Binding of lactoferrin to the surface of low-density lipoproteins modified by myeloperoxidase prevents intracellular cholesterol accumulation by human blood monocytes. Biochem Cell Biol 2021; 99:109-116. [DOI: 10.1139/bcb-2020-0141] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Myeloperoxidase (MPO) is a unique heme-containing peroxidase that can catalyze the formation of hypochlorous acid (HOCl). The strong interaction of MPO with low-density lipoproteins (LDL) promotes proatherogenic modification of LDL by HOCl. The MPO-modified LDL (Mox-LDL) accumulate in macrophages, resulting in the formation of foam cells, which is the pathognomonic symptom of atherosclerosis. A promising approach to prophylaxis and atherosclerosis therapy is searching for remedies that prevent the modification or accumulation of LDL in macrophages. Lactoferrin (LF) has several application points in obesity pathogenesis. We aimed to study LF binding to Mox-LDL and their accumulation in monocytes transformed into macrophages. Using surface plasmon resonance and ELISA techniques, we observed no LF interaction with intact LDL, whereas Mox-LDL strongly interacted with LF. The affinity of Mox-LDL to LF increased with the degree of oxidative modification of LDL. Moreover, an excess of MPO did not prevent interaction of Mox-LDL with LF. LF inhibits accumulation of cholesterol in macrophages exposed to Mox-LDL. The results obtained reinforce the notion of LF potency as a remedy against atherosclerosis.
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Affiliation(s)
- V.B. Vasilyev
- FSBSI (Institute of Experimental Medicine), Saint Petersburg 197376, Russia
- Saint Petersburg State University, Saint Petersburg 199034, Russia
| | - A.V. Sokolov
- FSBSI (Institute of Experimental Medicine), Saint Petersburg 197376, Russia
- Saint Petersburg State University, Saint Petersburg 199034, Russia
- Federal Research and Clinical Center of Physical–Chemical Medicine of Federal Medical Biological Agency, Moscow 119435, Russia
| | - V.A. Kostevich
- FSBSI (Institute of Experimental Medicine), Saint Petersburg 197376, Russia
- Federal Research and Clinical Center of Physical–Chemical Medicine of Federal Medical Biological Agency, Moscow 119435, Russia
| | - A.Yu. Elizarova
- FSBSI (Institute of Experimental Medicine), Saint Petersburg 197376, Russia
| | - N.P. Gorbunov
- FSBSI (Institute of Experimental Medicine), Saint Petersburg 197376, Russia
- Federal Research and Clinical Center of Physical–Chemical Medicine of Federal Medical Biological Agency, Moscow 119435, Russia
| | - O.M. Panasenko
- Federal Research and Clinical Center of Physical–Chemical Medicine of Federal Medical Biological Agency, Moscow 119435, Russia
- Pirogov Russian National Research Medical University, Moscow 117997, Russia
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Qi YF, Yang Y, Zhang Y, Liu S, Luo B, Liu W. Down regulation of lactotransferrin enhanced radio-sensitivity of nasopharyngeal carcinoma. Comput Biol Chem 2020; 90:107426. [PMID: 33352501 DOI: 10.1016/j.compbiolchem.2020.107426] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 11/24/2020] [Accepted: 11/29/2020] [Indexed: 01/09/2023]
Abstract
INTRODUCTION It is reported that LTF had a radiation resistance effect, and its expression in nasopharyngeal carcinoma (NPC) was significantly down-regulated. However, the mechanism of down-regulated LTF affecting the sensitivity of radiotherapy has remained elusive. METHODS We re-analyzed the microarray data GSE36972 and GSE48503 to find differentially expressed genes (DEGs) in NPC cell line 5-8 F transfected with LTF or vector control, and the DEGs between radio-resistant and radio-sensitive NPC cell lines. Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment and protein-protein interaction network (PPI) analysis of DEGs were performed to obtain the node genes. The target genes of miR-214 were also predicted to complement the mechanism associated with radiotherapy resistance because it could directly target LTF. RESULTS This study identified 1190 and 1279 DEGs, respectively. GO and KEGG analysis showed that apoptotic process and proliferation, PI3K-Akt signaling pathway were significantly enriched pathways. Four nodes (DUSP1, PPARGC1A, FOS and SMARCA1) associated with LTF were screened. And 42 target genes of miR-214 were cross-linked to radiotherapy sensitivity. CONCLUSIONS The present study demonstrates the possible molecular mechanism that the down-regulated LTF enhances the radiosensitivity of NPC cells through interaction with DUSP1, PPARGC1A, FOS and SMARCA1, and miR-214 as its superior negative regulator may play a role in regulating the radiotherapy effect.
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Affiliation(s)
- Yi-Fan Qi
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, 308 Ningxia Road, Qingdao, 266021, China; Qingdao Shinan District Center for Disease Control and Prevention, 90 Xuzhou Road, Qingdao, 266021, China.
| | - Yang Yang
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, 308 Ningxia Road, Qingdao, 266021, China.
| | - Yan Zhang
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, 308 Ningxia Road, Qingdao, 266021, China.
| | - Shuzhen Liu
- Department of Blood Transfusion, The Affiliated Hospital of Qingdao University, 19 Jiangsu Road, Qingdao, 266021, China.
| | - Bing Luo
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, 308 Ningxia Road, Qingdao, 266021, China.
| | - Wen Liu
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, 308 Ningxia Road, Qingdao, 266021, China.
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Effects of Metformin Combined with Lactoferrin on Lipid Accumulation and Metabolism in Mice Fed with High-Fat Diet. Nutrients 2018; 10:nu10111628. [PMID: 30400147 PMCID: PMC6265902 DOI: 10.3390/nu10111628] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 10/15/2018] [Accepted: 10/22/2018] [Indexed: 12/17/2022] Open
Abstract
Metformin (Met) and lactoferrin (Lf) both exhibit beneficial effects on body weight management and lipid accumulation. However, the synergistical action of Met and Lf remains unclear. In this study, 64 mice were divided into five groups, namely, the control group, high-fat diet (HFD group), HFD with Met (Met group), Lf (Lf group), and a combination of Met and Lf (Met + Lf group). Met (200 mg/kg body weight) and Lf (2 g/100 mL) were administrated in drinking water. The experiment lasted for 12 weeks. Body weight, serum, and hepatic lipids were determined. Histology of the liver and perirenal fat was observed. Protein expression related to hepatic lipid metabolism was also measured. HFD significantly increased body weight, visceral fat weight, and lipid profiles, which lead to obesity and dyslipidemia in mice. Compared with the HFD group, the treatments significantly decreased body weight and Lee’s index (body mass index of mice) with the lowest values in the Met + Lf group. The treatments also decreased the weight of visceral fat, and improved circulating lipid profile and the ability for regulating glucose intake. The adipocyte size and serum TC level were significantly lower in the Met + Lf group as compared with those in the Met or Lf group. The treatments alleviated hepatic lipid accumulation, especially in the Met + Lf group. For protein expression, the p-AMPK/AMPK ratio, a key kinase-regulating cellular energy homeostasis, was significantly higher in the Met + Lf group than the ratio in the HFD group. Similarly, the treatments significantly downregulated the protein expression of lipogenic enzymes (FAS, ACC, and SREBP-1) and upregulated the protein expression of lipolytic enzyme (ATGL). The protein expression of HMGCoAR, which is an important rate limiting enzyme in cholesterol biosynthesis, was only significantly lower in the Met + Lf group than in the HFD group. In conclusion, Met and Lf, either alone or in combination, prevented HFD-induced obesity and improved lipid metabolism.
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