1
|
Lobato S, Castillo-Granada AL, Bucio-Pacheco M, Salomón-Soto VM, Álvarez-Valenzuela R, Meza-Inostroza PM, Villegas-Vizcaíno R. PM 2.5, component cause of severe metabolically abnormal obesity: An in silico, observational and analytical study. Heliyon 2024; 10:e28936. [PMID: 38601536 PMCID: PMC11004224 DOI: 10.1016/j.heliyon.2024.e28936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/26/2024] [Accepted: 03/27/2024] [Indexed: 04/12/2024] Open
Abstract
Obesity is currently one of the most alarming pathological conditions due to the progressive increase in its prevalence. In the last decade, it has been associated with fine particulate matter suspended in the air (PM2.5). The purpose of this study was to explore the mechanistic interaction of PM2.5 with a high-fat diet (HFD) through the differential regulation of transcriptional signatures, aiming to identify the association of these particles with metabolically abnormal obesity. The research design was observational, using bioinformatic methods and an explanatory approach based on Rothman's causal model. We propose three new transcriptional signatures in murine adipose tissue. The sum of transcriptional differences between the group exposed to an HFD and PM2.5, compared to the control group, were 0.851, 0.265, and -0.047 (p > 0.05). The HFD group increased body mass by 20% with two positive biomarkers of metabolic impact. The group exposed to PM2.5 maintained a similar weight to the control group but exhibited three positive biomarkers. Enriched biological pathways (p < 0.05) included PPAR signaling, small molecule transport, adipogenesis genes, cytokine-cytokine receptor interaction, and HIF-1 signaling. Transcriptional regulation predictions revealed CpG islands and common transcription factors. We propose three new transcriptional signatures: FAT-PM2.5-CEJUS, FAT-PM2.5-UP, and FAT-PM2.5-DN, whose transcriptional regulation profile in adipocytes was statistically similar by dietary intake and HFD and exposure to PM2.5 in mice; suggesting a mechanistic interaction between both factors. However, HFD-exposed murines developed moderate metabolically abnormal obesity, and PM2.5-exposed murines developed severe abnormal metabolism without obesity. Therefore, in Rothman's terms, it is concluded that HFD is a sufficient cause of the development of obesity, and PM2.5 is a component cause of severe abnormal metabolism of obesity. These signatures would be integrated into a systemic biological process that would induce transcriptional regulation in trans, activating obesogenic biological pathways, restricting lipid mobilization pathways, decreasing adaptive thermogenesis and angiogenesis, and altering vascular tone thus inducing a severe metabolically abnormal obesity.
Collapse
Affiliation(s)
- Sagrario Lobato
- Departamento de Investigación en Salud, Servicios de Salud del Estado de Puebla, 15 South Street 302, Puebla, Mexico
- Promoción y Educación para la Salud, Universidad Abierta y a Distancia de México. Universidad Avenue 1200, 1st Floor, quadrant 1-2, Xoco, Benito Juarez, 03330, Mexico City, Mexico
- Educación Superior, Centro de Estudios, “Justo Sierra”, Surutato, Badiraguato, Mexico
| | - A. Lourdes Castillo-Granada
- Educación Superior, Centro de Estudios, “Justo Sierra”, Surutato, Badiraguato, Mexico
- Facultad de Estudios Superiores Zaragoza, Universidad Nacional Autónoma de México, Guelatao Avenue 66, Ejército de Oriente Indeco II ISSSTE, Iztapalapa, 09230, Mexico City, Mexico
| | - Marcos Bucio-Pacheco
- Educación Superior, Centro de Estudios, “Justo Sierra”, Surutato, Badiraguato, Mexico
- Facultad de Biología, Universidad Autónoma de Sinaloa, Americas Avenue, Universitarios Blvd., University City, 80040, Culiacán Rosales, Mexico
| | | | | | | | | |
Collapse
|
2
|
Sun R, Niu H, Li Y, Sun M, Hua M, Miao X, Su Y, Wang J, Li D, Wang Y. Fermented natto powder alleviates obesity by regulating LXR pathway and gut microbiota in obesity rats. J Appl Microbiol 2024; 135:lxae003. [PMID: 38192042 DOI: 10.1093/jambio/lxae003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 11/02/2023] [Accepted: 01/05/2024] [Indexed: 01/10/2024]
Abstract
AIM This study aimed to investigate the positive effect of natto powder on obese rats fed with a high-fat diet (HFD). METHODS AND RESULTS Sprague-Dawley rats were fed with a HFD for 8 weeks continuously and gavaged with natto powder, respectively, for 8 weeks starting from the ninth week. The results showed that natto powder significantly reduced the body weight of rats and maintained the balance of cholesterol metabolism in the body by inhibiting the activity of liver X receptors (LXR) target genes, increasing the active expression of cholesterol 7 alpha-hydroxylase, and reducing the active expression of sterol-regulatory element-binding protein and 3-hydroxy-3-methylglutaryl coenzyme A reductase (HMGCR). Furthermore, natto powder increased the relative abundance of potentially beneficial microbiota in gut and decreased the relative abundance of obesity-related harmful bacteria, and also increased the Bacteroidetes/Firmicutes ratio and improved the composition of gut microbiota. CONCLUSIONS Natto powder maintains the balance of cholesterol metabolism by inhibiting the LXR pathway and regulating the gut microbiota.
Collapse
Affiliation(s)
- Ruiyue Sun
- Institute of Agro-product Process, Jilin Academy of Agricultural Science, Changchun 130033, Jilin, China
- Future Food (Bai Ma) Research Institute, Nanjing 211200, Jiangsu, China
| | - Honghong Niu
- Institute of Agro-product Process, Jilin Academy of Agricultural Science, Changchun 130033, Jilin, China
| | - Yueqiao Li
- Science and Technology Exchange and Cooperation Division, Jilin Academy of Agricultural Sciences, Changchun 130033, Jilin, China
| | - Mubai Sun
- Institute of Agro-product Process, Jilin Academy of Agricultural Science, Changchun 130033, Jilin, China
| | - Mei Hua
- Institute of Agro-product Process, Jilin Academy of Agricultural Science, Changchun 130033, Jilin, China
| | - Xinyu Miao
- Institute of Agro-product Process, Jilin Academy of Agricultural Science, Changchun 130033, Jilin, China
| | - Ying Su
- Institute of Agro-product Process, Jilin Academy of Agricultural Science, Changchun 130033, Jilin, China
| | - Jinghui Wang
- Institute of Agro-product Process, Jilin Academy of Agricultural Science, Changchun 130033, Jilin, China
| | - Da Li
- Institute of Agro-product Process, Jilin Academy of Agricultural Science, Changchun 130033, Jilin, China
| | - Ying Wang
- Institute of Agricultural Quality Standards and Testing Technology, Liaoning Academy of Agricultural Sciences, Shenyang 110000, Liaoning, China
| |
Collapse
|
3
|
Fan X, Zhang Q, Guo W, Wu Q, Hu J, Cheng W, Lü X, Rao P, Ni L, Chen Y, Chen L. The protective effects of Levilactobacillus brevis FZU0713 on lipid metabolism and intestinal microbiota in hyperlipidemic rats. FOOD SCIENCE AND HUMAN WELLNESS 2023. [DOI: 10.1016/j.fshw.2023.02.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
|
4
|
Modulatory effects of Lactiplantibacillus plantarum on chronic metabolic diseases. FOOD SCIENCE AND HUMAN WELLNESS 2023. [DOI: 10.1016/j.fshw.2022.10.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
5
|
Cao C, Bian Y, Cang W, Wu J, Wu R. Structural characterization and hepatoprotective activity of exopolysaccharide from Bacillus velezensis SN-1. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2023; 103:738-749. [PMID: 36053948 DOI: 10.1002/jsfa.12185] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 06/07/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Exopolysaccharide biopolymers produced by microorganisms are crucial to the environment. They contribute to areas such as the health and bionanotechnology sectors, food and cosmetic industries as gelling agents, and environmental sector as flocculants owing to their biodegradability and non-toxic nature. The current study aimed to isolate the fraction of released exopolysaccharide (rEPS) by Bacillus velezensis SN-1 from Chinese Da-Jiang. RESULTS The weighted average molecular weight of the major isolated component, rEPS-2, was 202 kDa, and its monosaccharide composition included mannose, glucose, and galactose at a molar ratio of 0.38:0.30:0.32. Further, the rEPS-2 was characterized using methylation analysis and one-dimensional/two-dimensional nuclear magnetic resonance (1D/2D NMR) spectroscopy. In vivo hepatoprotective effects indicated that rEPS-2 could alleviate carbon tetrachloride (CCl4 )-induced liver injury in mice by lowering the activities of aspartate aminotransferase (AST), alanine aminotransferase (ALT), and the malondialdehyde (MDA) levels. Furthermore, rEPS-2 can increase the expression of antioxidant genes HO-1, GCLC and NQO1 in the Nrf2/ARE signaling pathway, thereby increasing the activity of antioxidant enzymes superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and reduced catalase (CAT) in liver cells. Furthermore, the rEPS-2 can be used and modulate the gut microbiota of mice with liver injury caused by CCl4 . CONCLUSIONS These results suggest that rEPS-2 has promising potential to serve as hepatoprotective agents. © 2022 Society of Chemical Industry.
Collapse
Affiliation(s)
- Chengxu Cao
- College of Food Science, Shenyang Agricultural University, Liaoning Engineering Research Centre of Food Fermentation Technology, Shenyang Key Laboratory of Microbial Fermentation Technology Innovation, Shenyang, P. R. China
- College of Grain Science and Technology, Shenyang Normal University, Shenyang, P. R. China
| | - Yuanyuan Bian
- College of Food Science, Shenyang Agricultural University, Liaoning Engineering Research Centre of Food Fermentation Technology, Shenyang Key Laboratory of Microbial Fermentation Technology Innovation, Shenyang, P. R. China
| | - Weihe Cang
- College of Food Science, Shenyang Agricultural University, Liaoning Engineering Research Centre of Food Fermentation Technology, Shenyang Key Laboratory of Microbial Fermentation Technology Innovation, Shenyang, P. R. China
| | - Junrui Wu
- College of Food Science, Shenyang Agricultural University, Liaoning Engineering Research Centre of Food Fermentation Technology, Shenyang Key Laboratory of Microbial Fermentation Technology Innovation, Shenyang, P. R. China
| | - Rina Wu
- College of Food Science, Shenyang Agricultural University, Liaoning Engineering Research Centre of Food Fermentation Technology, Shenyang Key Laboratory of Microbial Fermentation Technology Innovation, Shenyang, P. R. China
| |
Collapse
|
6
|
Wang X, Li L, Bai M, Zhao J, Sun X, Gao Y, Yu H, Chen X, Zhang C. Dietary supplementation with Tolypocladium sinense mycelium prevents dyslipidemia inflammation in high fat diet mice by modulation of gut microbiota in mice. Front Immunol 2022; 13:977528. [PMID: 36420262 PMCID: PMC9677100 DOI: 10.3389/fimmu.2022.977528] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 10/19/2022] [Indexed: 03/09/2024] Open
Abstract
Obesity is a risk factor for many serious health problems, associated with inflammation, hyperlipidemia, and gut dysbiosis. Prevention of obesity is especially important for human health. Tolypocladium sinense is one of the fungi isolated from Chinese caterpillar fungus, which is a traditional Chinese medicine with putative gut microbiota modulation effects. Here, we established a high-fat diet (HFD)-induced hyperlipidemia mice model, which was supplemented with lyophilized T. sinense mycelium (TSP) daily to evaluate its anti-obesity effects. The results indicated that TSP supplementation can effectively alleviate the inflammatory response and oxidative stress levels caused by obesity. TSP significantly prevented obesity and suppressed dyslipidemia by regulating the expression of lipid metabolism genes in the liver. TSP is also effective in preventing the HFD-induced decline in short-chain fatty acid (SCFA) content. Gut microbiota profiling showed that TSP supplementation reversed HFD diet-induced bacterial abundance and also altered the metabolic pathways of functional microorganisms, as revealed by KEGG analysis. It is noteworthy that, correlation analysis reveals the up-regulated gut microbiota (Lactobacillus and Prevotella_9) are closely correlated with lipid metabolism parameters, gene expression of liver lipid metabolism and inflammatory. Additionally, the role of TSP in the regulation of lipid metabolism was reconfirmed by fecal microbiota transplantation. To sum up, our results provide the evidence that TSP may be used as prebiotic agents to prevent obesity by altering the gut microbiota, alleviating the inflammatory response and regulating gene expression of liver lipid metabolism.
Collapse
Affiliation(s)
- Xiaolong Wang
- Department of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Lin Li
- Department of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Mingjian Bai
- Department of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Jiaxin Zhao
- National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and Cultivation, School of Life Sciences, Jilin University, Changchun, China
| | - Xiaojie Sun
- Department of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Yu Gao
- Department of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Haitao Yu
- Department of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Xia Chen
- National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and Cultivation, School of Life Sciences, Jilin University, Changchun, China
| | - Chunjing Zhang
- Department of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| |
Collapse
|
7
|
The Mechanisms of the Potential Probiotic Lactiplantibacillus plantarum against Cardiovascular Disease and the Recent Developments in its Fermented Foods. Foods 2022; 11:foods11172549. [PMID: 36076735 PMCID: PMC9455256 DOI: 10.3390/foods11172549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 08/12/2022] [Accepted: 08/18/2022] [Indexed: 11/17/2022] Open
Abstract
Cardiovascular disease (CVD) has become the leading cause of death worldwide. Many recent studies have pointed out that Lactiplantibacillus plantarum (Lb. plantarum) has great potential in reducing the risk of CVD. Lb. plantarum is a kind of lactic acid bacteria (LAB) widely distributed in fermented food and the human intestinal tract, some strains of which have important effects on human health and the potential to be developed into probiotics. In this review, we summarize the mechanism of potential probiotic strains of Lb. plantarum against CVD. It could regulate the body’s metabolism at the molecular, cellular, and population levels, thereby lowering blood glucose and blood lipids, regulating blood pressure, and ultimately reducing the incidence of CVD. Furthermore, since Lb. plantarum is widely utilized in food industry, we highlight some of the most important new developments in fermented food for combating CVD; providing an insight into these fermented foods can assist scientists in improving the quality of these foods as well as alleviating patients’ CVD symptoms. We hope that in the future functional foods fermented by Lb. plantarum can be developed and incorporated into the daily diet to assist medication in alleviating CVD to some extent, and maintaining good health.
Collapse
|
8
|
Munir A, Ayesha Javed G, Javed S, Arshad N. Levilactobacillus brevis from carnivores can ameliorate hypercholesterolemia: in vitro and in vivo mechanistic evidence. J Appl Microbiol 2022; 133:1725-1742. [PMID: 35729721 DOI: 10.1111/jam.15678] [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: 09/26/2021] [Revised: 06/14/2022] [Accepted: 06/15/2022] [Indexed: 11/28/2022]
Abstract
AIMS To explore the probiotic and hypocholesterolemic potential of two Levilactobacillus brevis strains of carnivore origin along with selected underlying mechanisms. METHODS AND RESULTS L. brevis MT950194 and L. brevis MW365351 were analyzed in vitro for oro-gastro-intestinal stress tolerance, cholesterol reduction, cholesterol adsorption (through scanning electron microscopy) and bile salt hydrolase (BSH) activity. Strains could survive (> 80%) in oro-gastro-intestinal conditions, reduce high amount of cholesterol (35% and 54%) from media containing bile salts (0.3%) as compared with Lactobacillus acidophilus ATCC4356 and presented least pathogenicity towards mammalian cells. Exopolysaccharide production, cell surface cholesterol adherence and BSH activity were witnessed as possible cholesterol lowering mechanisms. In in vivo experiment, the treatments of hypercholesterolemic rats with L. brevis MT950194, L. brevis MW365351 and their mixture led to significant (p < 0.05) reduction in serum and hepatic cholesterol, low density lipids, cholesterol ratio, liver steatosis, and size of adipocytes. It further ameliorated diet induced changes in hepatic enzymes. CONCLUSIONS L. brevis MT950194 and L. brevis MW365351 from carnivores have probiotic pharmacological potential and can reduce serum cholesterol through surface adherence and BSH production. SIGNIFICANCE AND IMPACT OF STUDY These strains may be utilized in treating hypercholesterolemia and production of low fat functional foods.
Collapse
Affiliation(s)
- Aneela Munir
- Institute of Zoology, University of the Punjab, Lahore, Pakistan
| | | | - Saman Javed
- Institute of Zoology, University of the Punjab, Lahore, Pakistan
| | - Najma Arshad
- Institute of Zoology, University of the Punjab, Lahore, Pakistan.,Institute of Molecular Biology and Biotechnology (IMBB), Centre for Research in Molecular, Medicine (CRIMM), The University of Lahore, Pakistan
| |
Collapse
|
9
|
Jiang C, Liu Y, Wang Y, Su E, Du L, Tang Y, Xie J, Wei D. Hypolipidemic effects of the fermented soymilk with a novel
Lactiplantibacillus plantarum
strain X7021 on mice via modulating lipid metabolism and gut microbiota. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Chentian Jiang
- State Key Laboratory of Bioreactor Engineering Department of Food Science and Technology School of Biotechnology East China University of Science and Technology Shanghai 200237 China
| | - Yafan Liu
- State Key Laboratory of Bioreactor Engineering Department of Food Science and Technology School of Biotechnology East China University of Science and Technology Shanghai 200237 China
| | - Yijia Wang
- State Key Laboratory of Bioreactor Engineering Department of Food Science and Technology School of Biotechnology East China University of Science and Technology Shanghai 200237 China
| | - Erzheng Su
- College of Light Industry and Food Engineering Nanjing Forestry University Nanjing 210037 China
| | - Lei Du
- State Key Laboratory of Bioreactor Engineering Department of Food Science and Technology School of Biotechnology East China University of Science and Technology Shanghai 200237 China
| | - Ya‐Jie Tang
- State Key Laboratory of Microbial Technology Shandong University Qingdao 266237 China
| | - Jingli Xie
- State Key Laboratory of Bioreactor Engineering Department of Food Science and Technology School of Biotechnology East China University of Science and Technology Shanghai 200237 China
- Shanghai Collaborative Innovation Center for Biomanufacturing (SCICB) Shanghai 200237 China
| | - Dongzhi Wei
- State Key Laboratory of Bioreactor Engineering Department of Food Science and Technology School of Biotechnology East China University of Science and Technology Shanghai 200237 China
- Shanghai Collaborative Innovation Center for Biomanufacturing (SCICB) Shanghai 200237 China
| |
Collapse
|
10
|
Effect of Lactobacillus fermentum HFY06 Combined with Arabinoxylan on Reducing Lipid Accumulation in Mice Fed with High-Fat Diet. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:1068845. [PMID: 35432720 PMCID: PMC9007687 DOI: 10.1155/2022/1068845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 01/27/2022] [Accepted: 03/15/2022] [Indexed: 11/25/2022]
Abstract
In this experiment, a high-fat diet was used to induce hyperlipidemia in mice to determine the synergistic effect of AX and L. fermentum HFY06 on the prevention of hyperlipidemia and its potential regulatory mechanism. The results of this study showed that after the AX and L. fermentum HFY06 synergistic intervention, the body weight, epididymal fat index, blood lipid level, and liver function indexes of mice were improved. In addition, the synbiotics comprising AX and L. fermentum HFY06 increased the CAT activity in the serum of mice on a high-fat diet, reduced NO and MDA levels, and improved the body's oxidative stress. From the perspective of molecular biology, on the one hand, AX and L. fermentum HFY06 synergistic intervention activated the AMPK pathway to regulate body lipid metabolism; up-regulated the mRNA expressions of CPT-1, PPAR-α, CYP7A1, and HSL; and down-regulated the mRNA expressions of ACC, C/EBPα, and LPL. On the other hand, the synergistic effect of AX and HFY06 enhanced the mRNA expressions of ZO-1, occludin, and claudin-1 in the small intestine of mice, increased the strength of the intestinal barrier, and optimized the composition of the intestinal microbiota. From the above results, it can be concluded that AX and L. fermentum HFY06 have a synergistic effect in improving hyperlipidemia. However, this study was only performed using animal models, and the lipid synthesis and metabolism mechanism are complicated; hence, further clinical studies are needed.
Collapse
|
11
|
Zhang Q, Fan XY, Cao YJ, Zheng TT, Cheng WJ, Chen LJ, Lv XC, Ni L, Rao PF, Liang P. The beneficial effects of Lactobacillus brevis FZU0713-fermented Laminaria japonica on lipid metabolism and intestinal microbiota in hyperlipidemic rats fed with a high-fat diet. Food Funct 2021; 12:7145-7160. [PMID: 34231612 DOI: 10.1039/d1fo00218j] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This study aimed to investigate the beneficial effects of the oral administration of Lactobacillus brevis FZU0713-fermented Laminaria japonica (FLJ) on lipid metabolism and intestinal microbiota in hyperlipidemic rats fed with a high-fat diet (HFD). The results demonstrated that the oral administration of FLJ significantly inhibited obesity and improved the serum and hepatic biochemical parameters in HFD-fed rats. Histopathological results also indicated that FLJ intervention could significantly reduce the accumulation of lipid droplets in the liver induced by HFD feeding. Furthermore, FLJ intervention up-regulated the fecal short-chain fatty acid (SCFA) levels (mainly acetate, propionate and isobutyrate) in HFD-fed rats. Intestinal microbiota profiling by 16S rRNA gene sequencing revealed that FLJ intervention increased the relative abundance of Akkermansia, Collinsella, Ruminococcaceae_UCG-013, Defluviitaleaceae_UCG-011, Intestinimonas, Actinomyces and Tyzzerella, but decreased the abundance of Flavonifractor, Collinsella, Sporosarcina and Lacticigenium. Based on Spearman's correlation, the fecal levels of TC, TG, acetic acid and butyric acid were positively correlated with the relative abundance of Akkermansia and Ruminococcaceae_NK4A214, but negatively correlated with the relative amount of Flavonifractor and Collinsella. The metabolic function of intestinal microbiota predicted by PICRUSt analysis of 16S rRNA gene sequences demonstrated that primary and secondary bile acid biosyntheses, fatty acid biosynthesis, taurine and hypotaurine metabolism, arachidonic acid metabolism, glycolysis/gluconeogenesis, etc. were significantly down-regulated after 8 weeks of FLJ intervention. Additionally, FLJ intervention significantly regulated the hepatic mRNA levels (including BSEP, CYP7A1, LDLR, HMGCR, CD36 and SREBP1-C) involved in lipid metabolism and bile acid homeostasis. In conclusion, these findings support the possibility that Laminaria japonica fermented with probiotic Lactobacillus has the potential to reduce the disturbance of lipid metabolism by regulating intestinal microflora and liver gene expression profiles, so it can be employed as a potential functional food to prevent hyperlipidemia.
Collapse
Affiliation(s)
- Qing Zhang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, P. R. China.
| | | | | | | | | | | | | | | | | | | |
Collapse
|