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Zhao S, Yan Q, Xu W, Zhang J. Gut microbiome in diabetic retinopathy: A systematic review and meta-analysis. Microb Pathog 2024; 189:106590. [PMID: 38402917 DOI: 10.1016/j.micpath.2024.106590] [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: 12/29/2023] [Accepted: 02/18/2024] [Indexed: 02/27/2024]
Abstract
CONTEXT Changes in the gut microbiome are linked with Type 2diabetes mellitus (T2DM) development, but alterations in patients with diabetic retinopathy (DR) are still being debated. OBJECTIVE To investigate the differences in biodiversity and relative abundance of gut microbiome between patients with DR and T2DM. METHODS A comprehensive search was performed in five electronic databases (PubMed, EMBASE, Cochrane Central Register of Controlled Trials, Web of Science, and CNKI) from the inception of each database through to August 2023. The standardized mean difference (SMD) and its 95% confidence interval (CI) were estimated using Stata 15.1. Furthermore, the alpha diversity index and relative abundance of the gut microbiome were calculated. The Egger test determined publication bias in the literature. RESULTS Seven case-control studies were included in the final dataset, comprising 195 patients with DR and 211 patients with T2DM. Compared to T2DM patients, patients in the DR group had a reduced but not significantly different α-diversity. The analysis of microbial composition at the phylum level revealed a marked increase in the relative abundance of Bacteroidetes(ES = 23.27, 95%CI[8.30, 38.23], P = 0.000) and a decline in Firmicutes(ES = 47.05, 95%CI[36.58, 57.52], P = 0.000), Proteobacteria (ES = 11.08, 95%CI[6.08, 16.07], P = 0.000) and Actinobacteria (ES = 10.43, 95%CI[1.64, 19.22], P = 0.001) in patients with DR when compared to those with T2DM. CONCLUSIONS An association exists between alterations in the gut microbiome of T2DM and the development and progression of DR. This suggests that re-establishing homeostasis of the gut microbiome could be a potential way to prevent or treat DR and requires further confirmation in future studies. REGISTRATION DATABASE Prospero. REGISTRATION NUMBER CRD42023455280.
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Affiliation(s)
- Shuang Zhao
- Shandong First Medical University, Jinan, China.
| | - Qi Yan
- Jiangsu Pei People's Hospital, China.
| | - Wanjing Xu
- Qingpu Branch of Zhongshan Hospital Affiliated to Fudan University, China.
| | - Juanmei Zhang
- The Department of Ophthalmology, Linyi People's Hospital, Linyi, China.
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Oganov AC, Seddon I, Zein M, Yazdanpanah G, Fonoudi H, Jabbehdari S. Composition of the gut microbiome, role of diet, lifestyle, and antioxidant therapies in diabetes mellitus and diabetic retinopathy. Eur J Ophthalmol 2024; 34:367-383. [PMID: 37150930 DOI: 10.1177/11206721231174490] [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] [Indexed: 05/09/2023]
Abstract
The gut microbiome is a complex ecosystem in the gastrointestinal tract composed of trillions of bacteria, viruses, fungi, and protozoa. Disruption of this delicate ecosystem, formally called "dysbiosis", has been linked to a variety of metabolic and inflammatory pathologies. Several studies have focused on abnormal microbiome composition and correlated these findings with the development of type 2 diabetes mellitus (T2DM) and diabetic retinopathy (DR). However, given the complexity of this ecosystem, the current studies are narrow in design and present variable findings. Composition of the gut microbiome in patients with DR significantly differs from patients with diabetes without retinopathy as well as from healthy controls. Additionally, the gut microbiome has been shown to modify effects of medication, diet, exercise, and antioxidant use on the development and progression of DR. In this paper, we present a comprehensive review of literature on the effect of oxidative stress, antioxidant therapies, and dysbiosis on DR.
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Affiliation(s)
- Anthony C Oganov
- Department of Ophthalmology, Renaissance School of Medicine, Stony Brook, NY, USA
| | - Ian Seddon
- College of Osteopathic Medicine, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Mike Zein
- Department of Ophthalmology, Cook County Health, Chicago, IL, USA
| | - Ghasem Yazdanpanah
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
| | - Hossein Fonoudi
- Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
- Iranshahr University of Medical Sciences, Iranshahr, Iran
| | - Sayena Jabbehdari
- Jones Eye Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
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Su Y, Ren J, Zhang J, Zheng J, Zhang Q, Tian Y, Zhang Y, Jiang Y, Zhang W. Lactobacillus paracasei JY062 Alleviates Glucolipid Metabolism Disorders via the Adipoinsular Axis and Gut Microbiota. Nutrients 2024; 16:267. [PMID: 38257160 PMCID: PMC10819581 DOI: 10.3390/nu16020267] [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: 12/14/2023] [Revised: 01/11/2024] [Accepted: 01/12/2024] [Indexed: 01/24/2024] Open
Abstract
Glycolipid metabolic disorders (GLMD) refer to a series of metabolic disorders caused by abnormal processes of glucose and lipid synthesis, decomposition, and absorption in the body, leading to glucose and lipid excess, insulin resistance, and obesity. Probiotic intervention is a new strategy to alleviate metabolic syndrome. Lactobacillus paracasei JY062 (L. paracasei JY062) was separated from the Tibet-fermented dairy products. The results demonstrated a strong ability to relieve blood glucose disorders, blood lipid disorders, and tissue damage. The LPH group had the best effect, significantly decreasing the total cholesterol (TC), triglycerides (TG), low-density lipoprotein cholesterol (LDL-C), leptin, insulin, and free fatty acid (FFA) concentrations and increasing the high-density lipoprotein cholesterol, adiponectin, and GLP-1 level compared to HFD-group mice. L. paracasei JY062 could activate the APN-AMPK pathway, increased AdipoQ, AMPK GLUT-4, and PGC-1α mRNA expression and decreased SREBP-1c, ACC, and FAS mRNA expression. L. paracasei JY062 intervention decreased the relative abundance of harmful bacteria, increased the relative abundance of beneficial bacteria, and restored the imbalance of gut microbiota homeostasis caused by a high-glucose-fat diet. L. paracasei JY062 alleviated glucolipid metabolism disorders via the adipoinsular axis and gut microbiota. This study provided a theoretical basis for probiotics to ameliorate glucolipid metabolism disorders by regulating the adipoinsular axis.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Wei Zhang
- Key Laboratory of Dairy Science, Ministry of Education, Department of Food Science, Northeast Agricultural University, Harbin 150030, China; (Y.S.); (J.R.); (J.Z.); (J.Z.); (Q.Z.); (Y.T.); (Y.Z.); (Y.J.)
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4
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Li Y, Si H, Ma Y, Li S, Gao L, Liu K, Liu X. Vitamin D3 affects the gut microbiota in an LPS-stimulated systemic inflammation mouse model. Microbes Infect 2023; 25:105180. [PMID: 37419238 DOI: 10.1016/j.micinf.2023.105180] [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: 07/31/2022] [Revised: 06/08/2023] [Accepted: 06/29/2023] [Indexed: 07/09/2023]
Abstract
Although gut dysbiosis contributes to systemic inflammation, the counteractive effect of systemic inflammation on gut microbiota is unknown. Vitamin D may exert anti-inflammatory effects against systemic inflammation, but its regulation of the gut microbiota is poorly understood. In this study, mice were intraperitoneally injected with lipopolysaccharide (LPS) to create a systemic inflammation model and received vitamin D3 treatment orally for 18 continuous days. Then, body weight, morphological changes in the colon epithelium, and gut microbiota (n = 3) were evaluated. We verified that LPS stimulation caused inflammatory changes in the colon epithelium, which could be obviously attenuated by vitamin D3 treatment (10 μg/kg/day) in mice. Then, 16S rRNA gene sequencing of the gut microbiota first revealed that LPS stimulation induced a large number of operational taxonomic units, and vitamin D3 treatment reduced the number. In addition, vitamin D3 had distinctive effects on the community structure of the gut microbiota, which was obviously changed after LPS stimulation. However, neither LPS nor vitamin D3 affected the alpha and beta diversity of the gut microbiota. Furthermore, statistical analysis of differential microorganisms showed that the relative abundance of microorganisms in the phylum Spirochaetes decreased, the family Micrococcaceae increased, the genus [Eubacterium]_brachy_group decreased, the genus Pseudarthrobacter increased, and the species Clostridiales_bacterium_CIEAF_020 decreased under LPS stimulation, but vitamin D3 treatment significantly reversed the LPS-induced changes in the relative abundance of these microorganisms. In conclusion, vitamin D3 treatment affected the gut microbiota and alleviated inflammatory changes in the colon epithelium in the LPS-stimulated systemic inflammation mouse model.
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Affiliation(s)
- Yanning Li
- Center for Drug Discovery Innovation, College of Life Science, Hebei Normal University, Shijiazhuang 050024, Hebei, PR China; Department of Molecular Biology, Hebei Key Lab of Laboratory Animal Science, Hebei Medical University, Shijiazhuang 050017, Hebei, PR China
| | - Hongbo Si
- Department of Molecular Biology, Hebei Key Lab of Laboratory Animal Science, Hebei Medical University, Shijiazhuang 050017, Hebei, PR China
| | - Yujie Ma
- Department of Molecular Biology, Hebei Key Lab of Laboratory Animal Science, Hebei Medical University, Shijiazhuang 050017, Hebei, PR China
| | - Shuang Li
- Center for Drug Discovery Innovation, College of Life Science, Hebei Normal University, Shijiazhuang 050024, Hebei, PR China
| | - Lijie Gao
- Center for Drug Discovery Innovation, College of Life Science, Hebei Normal University, Shijiazhuang 050024, Hebei, PR China
| | - Kun Liu
- Department of Molecular Biology, Hebei Key Lab of Laboratory Animal Science, Hebei Medical University, Shijiazhuang 050017, Hebei, PR China
| | - Xifu Liu
- Center for Drug Discovery Innovation, College of Life Science, Hebei Normal University, Shijiazhuang 050024, Hebei, PR China.
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Chen S, Wang N, Xiong S, Xia X. The correlation between primary open-angle glaucoma (POAG) and gut microbiota: a pilot study towards predictive, preventive, and personalized medicine. EPMA J 2023; 14:539-552. [PMID: 37605653 PMCID: PMC10439875 DOI: 10.1007/s13167-023-00336-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 07/29/2023] [Indexed: 08/23/2023]
Abstract
Background Glaucoma is the leading cause of irreversible blindness worldwide. Emerged evidence has shown that glaucoma is considered an immune system related disorder. The gut is the largest immune organ in the human body and the gut microbiota (GM) plays an irreversible role in maintaining immune homeostasis. But, how the GM influences glaucoma remains unrevealed. This study aimed at investigating the key molecules/pathways mediating the GM and the glaucoma to provide new biomarkers for future predictive, preventive, and personalized medicine. Methods Datasets from the primary open-angle glaucoma (POAG) patients (GSE138125) and datasets for target genes of GM/GM metabolites were downloaded from a public database. For GSE138125, the differentially expressed genes (DEGs) between healthy and POAG samples were identified. And the online Venn diagram tool was used to obtain the DEGs from POAG related to GM. After which GM-related DEGs were analyzed by correlation analysis, pathway enrichment analysis, and protein-protein interaction (PPI) network analysis. Human trabecular meshwork cells were used for validation, and the mRNA level of hub genes was verified by quantitative real-time polymerase chain reaction (RT-qPCR) in the in vitro glaucoma model. Results A total of 16 GM-related DEGs in POAG were identified from the above 2 datasets (9 upregulated genes and 7 downregulated genes). Pathway enrichment analysis indicated that these genes are mostly enriched in immune regulation especially macrophages-related pathways. Then 6 hub genes were identified by PPI network analysis and construction of key modules. Finally, RT-qPCR confirmed that the expression of the hub genes in the in vitro glaucoma model was consistent with the results of bioinformatics analysis of the mRNA chip. Conclusion This bioinformatic study elucidates NFKB1, IL18, KITLG, TLR9, FKBP2, and HDAC4 as hub genes for POAG and GM regulation. Immune response modulated by macrophages plays an important role in POAG and may be potential targets for future predictive, preventive, and personalized diagnosis and treatment. Supplementary Information The online version contains supplementary material available at 10.1007/s13167-023-00336-2.
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Affiliation(s)
- Si Chen
- Eye Center of Xiangya Hospital, Central South University, Changsha, 410008 Hunan China
- Hunan Key Laboratory of Ophthalmology, Changsha, Hunan China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan China
| | - Nan Wang
- Eye Center of Xiangya Hospital, Central South University, Changsha, 410008 Hunan China
- Hunan Key Laboratory of Ophthalmology, Changsha, Hunan China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan China
| | - Siqi Xiong
- Eye Center of Xiangya Hospital, Central South University, Changsha, 410008 Hunan China
- Hunan Key Laboratory of Ophthalmology, Changsha, Hunan China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan China
| | - Xiaobo Xia
- Eye Center of Xiangya Hospital, Central South University, Changsha, 410008 Hunan China
- Hunan Key Laboratory of Ophthalmology, Changsha, Hunan China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan China
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Fanaro GB, Marques MR, Calaza KDC, Brito R, Pessoni AM, Mendonça HR, Lemos DEDA, de Brito Alves JL, de Souza EL, Cavalcanti Neto MP. New Insights on Dietary Polyphenols for the Management of Oxidative Stress and Neuroinflammation in Diabetic Retinopathy. Antioxidants (Basel) 2023; 12:1237. [PMID: 37371967 PMCID: PMC10295526 DOI: 10.3390/antiox12061237] [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: 04/15/2023] [Revised: 06/05/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
Diabetic retinopathy (DR) is a neurodegenerative and vascular pathology that is considered one of the leading causes of blindness worldwide, resulting from complications of advanced diabetes mellitus (DM). Current therapies consist of protocols aiming to alleviate the existing clinical signs associated with microvascular alterations limited to the advanced disease stages. In response to the low resolution and limitations of the DR treatment, there is an urgent need to develop more effective alternative therapies to optimize glycemic, vascular, and neuronal parameters, including the reduction in the cellular damage promoted by inflammation and oxidative stress. Recent evidence has shown that dietary polyphenols reduce oxidative and inflammatory parameters of various diseases by modulating multiple cell signaling pathways and gene expression, contributing to the improvement of several chronic diseases, including metabolic and neurodegenerative diseases. However, despite the growing evidence for the bioactivities of phenolic compounds, there is still a lack of data, especially from human studies, on the therapeutic potential of these substances. This review aims to comprehensively describe and clarify the effects of dietary phenolic compounds on the pathophysiological mechanisms involved in DR, especially those of oxidative and inflammatory nature, through evidence from experimental studies. Finally, the review highlights the potential of dietary phenolic compounds as a prophylactic and therapeutic strategy and the need for further clinical studies approaching the efficacy of these substances in DR management.
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Affiliation(s)
- Gustavo Bernardes Fanaro
- Institute of Health and Biotechnology, Federal University of Amazonas, Manaus 69460000, Amazonas, Brazil;
| | | | - Karin da Costa Calaza
- Department of Neurobiology, Institute of Biology, Fluminense Federal University, Niterói 24210201, Rio de Janeiro, Brazil;
| | - Rafael Brito
- Department of Cellular and Molecular Biology, Institute of Biology, Fluminense Federal University, Niterói 24210201, Rio de Janeiro, Brazil;
| | | | - Henrique Rocha Mendonça
- Institute of Biodiversity and Sustainability (NUPEM), Federal University of Rio de Janeiro, Macaé 27965045, Rio de Janeiro, Brazil; (H.R.M.); (M.P.C.N.)
| | | | - José Luiz de Brito Alves
- Department of Nutrition, Health Sciences Center, Federal University of Paraíba, João Pessoa 58051900, Paraíba, Brazil; (D.E.d.A.L.); (J.L.d.B.A.)
| | - Evandro Leite de Souza
- Department of Nutrition, Health Sciences Center, Federal University of Paraíba, João Pessoa 58051900, Paraíba, Brazil; (D.E.d.A.L.); (J.L.d.B.A.)
| | - Marinaldo Pacífico Cavalcanti Neto
- Institute of Biodiversity and Sustainability (NUPEM), Federal University of Rio de Janeiro, Macaé 27965045, Rio de Janeiro, Brazil; (H.R.M.); (M.P.C.N.)
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Bagyánszki M, Bódi N. Key elements determining the intestinal region-specific environment of enteric neurons in type 1 diabetes. World J Gastroenterol 2023; 29:2704-2716. [PMID: 37274063 PMCID: PMC10237112 DOI: 10.3748/wjg.v29.i18.2704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 03/28/2023] [Accepted: 04/17/2023] [Indexed: 05/11/2023] Open
Abstract
Diabetes, as a metabolic disorder, is accompanied with several gastrointestinal (GI) symptoms, like abdominal pain, gastroparesis, diarrhoea or constipation. Serious and complex enteric nervous system damage is confirmed in the background of these diabetic motility complaints. The anatomical length of the GI tract, as well as genetic, developmental, structural and functional differences between its segments contribute to the distinct, intestinal region-specific effects of hyperglycemia. These observations support and highlight the importance of a regional approach in diabetes-related enteric neuropathy. Intestinal large and microvessels are essential for the blood supply of enteric ganglia. Bidirectional morpho-functional linkage exists between enteric neurons and enteroglia, however, there is also a reciprocal communication between enteric neurons and immune cells on which intestinal microbial composition has crucial influence. From this point of view, it is more appropriate to say that enteric neurons partake in multidirectional communication and interact with these key players of the intestinal wall. These interplays may differ from segment to segment, thus, the microenvironment of enteric neurons could be considered strictly regional. The goal of this review is to summarize the main tissue components and molecular factors, such as enteric glia cells, interstitial cells of Cajal, gut vasculature, intestinal epithelium, gut microbiota, immune cells, enteroendocrine cells, pro-oxidants, antioxidant molecules and extracellular matrix, which create and determine a gut region-dependent neuronal environment in diabetes.
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Affiliation(s)
- Mária Bagyánszki
- Department of Physiology, Anatomy and Neuroscience, Faculty of Science and Informatics, University of Szeged, Szeged H-6726, Hungary
| | - Nikolett Bódi
- Department of Physiology, Anatomy and Neuroscience, Faculty of Science and Informatics, University of Szeged, Szeged H-6726, Hungary
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Wang L, Liang X, Chen H, Cao L, Liu L, Zhu F, Ding Y, Tang J, Xie Y. CDEMI: characterizing differences in microbial composition and function in microbiome data. Comput Struct Biotechnol J 2023; 21:2502-2513. [PMID: 37090432 PMCID: PMC10113763 DOI: 10.1016/j.csbj.2023.03.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 03/23/2023] [Accepted: 03/24/2023] [Indexed: 03/28/2023] Open
Abstract
Microbial communities influence host phenotypes through microbiota-derived metabolites and interactions between exogenous active substances (EASs) and the microbiota. Owing to the high dynamics of microbial community composition and difficulty in microbial functional analysis, the identification of mechanistic links between individual microbes and host phenotypes is complex. Thus, it is important to characterize variations in microbial composition across various conditions (for example, topographical locations, times, physiological and pathological conditions, and populations of different ethnicities) in microbiome studies. However, no web server is currently available to facilitate such characterization. Moreover, accurately annotating the functions of microbes and investigating the possible factors that shape microbial function are critical for discovering links between microbes and host phenotypes. Herein, an online tool, CDEMI, is introduced to discover microbial composition variations across different conditions, and five types of microbe libraries are provided to comprehensively characterize the functionality of microbes from different perspectives. These collective microbe libraries include (1) microbial functional pathways, (2) disease associations with microbes, (3) EASs associations with microbes, (4) bioactive microbial metabolites, and (5) human body habitats. In summary, CDEMI is unique in that it can reveal microbial patterns in distributions/compositions across different conditions and facilitate biological interpretations based on diverse microbe libraries. CDEMI is accessible at http://rdblab.cn/cdemi/.
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Affiliation(s)
- Lidan Wang
- School of Basic Medicine, Chongqing Medical University, Chongqing 400016, China
- Department of Obstetrics and Gynecology, Women and Children’s Hospital of Chongqing Medical University, Chongqing 401147, China
| | - Xiao Liang
- School of Basic Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Hao Chen
- School of Basic Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Lijie Cao
- School of Basic Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Lan Liu
- School of Basic Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Feng Zhu
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yubin Ding
- Department of Obstetrics and Gynecology, Women and Children’s Hospital of Chongqing Medical University, Chongqing 401147, China
- Corresponding authors.
| | - Jing Tang
- School of Basic Medicine, Chongqing Medical University, Chongqing 400016, China
- Joint International Research Laboratory of Reproductive and Development, Department Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing 400016, China
- Corresponding author at: School of Basic Medicine, Chongqing Medical University, Chongqing 400016, China.
| | - Youlong Xie
- Joint International Research Laboratory of Reproductive and Development, Department Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing 400016, China
- Corresponding authors.
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Di S, Yao C, Qiao L, Li X, Pang B, Lin J, Wang J, Li M, Tong X. Exploration of the mechanisms underlying the beneficial effect of Luo Tong formula on retinal function in diabetic rats via the "gut microbiota-inflammation-retina" axis. Chin Med 2022; 17:133. [PMID: 36461068 PMCID: PMC9717245 DOI: 10.1186/s13020-022-00688-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 11/14/2022] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND Diabetic retinopathy (DR) is a common microvascular complication of diabetes. Luo Tong formula (LTF), a classical traditional Chinese medicine (TCM) prescription, consists of four plants that have been widely and effectively used to treat DR. Previous work in our laboratory has confirmed that LTF can effectively ameliorate DR. However, the potential mechanism underlying the therapeutic effect of LTF on DR has not been fully elucidated. To explore the potential mechanism of action through which LTF prevents and alleviates DR from an inflammation and gut microbiota perspective. MATERIALS AND METHODS Metabolite profiling of LTF was performed using liquid chromatography-mass spectrometry (LC-MS) and gas chromatography-mass spectrometry (GC-MS). Type 1 diabetes was induced in male Sprague Dawley (SD) rats via tail vein injection of 45 mg/kg streptozotocin. Next, 100 SD rats were randomly divided into four groups, normal control; diabetic control; diabetic + insulin + calcium dobesilate; and diabetic + insulin + LTF. After 12 weeks of treatment, glucose metabolism, fundus oculi, blood-retinal barrier permeability, retinal thickness, microvascular damage, as well as cell junction expression in retinas were measured and the changes observed in different groups were compared. Finally, the alteration in gut microbiota and inflammatory cytokine expression in serum and tissues were monitored, and their correlation was analyzed. RESULTS A total of 1024 valid peaks were obtained for LTF using GC-MS. The HbA1c and fasting blood glucose (FBG) levels in the LTF group were slightly decreased. LTF exerted protective effects on fundus oculi and the retina structure to different degrees. LTF attenuated systemic and local retinal inflammation by significantly decreasing the levels of seven pro-inflammatory cytokines, including ICAM-1, IL-6, IL-8, MCP-1, VCAM-1, VEGF, and IL-1β. LTF restored the intestinal microbiota of diabetic rats to levels that were similar to those of normal rats. Further analysis revealed that Enterobacteriales, Prevotellaceae, Enterobacteriaceae, Bacteroides, and Klebsiella were significantly and positively correlated with the inflammatory factors in DR after LTF treatment. CONCLUSIONS Our results revealed the mechanisms underlying the preventive effects of LTF on DR development and progression. LTF inhibited pathological changes in retinal histopathology, cell composition, and cell junction proteins while effectively ameliorating systemic and local retinal inflammation via regulating pivotal gut microbiota.
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Affiliation(s)
- Sha Di
- grid.410318.f0000 0004 0632 3409Department of Endocrinology, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053 China
| | - Chensi Yao
- grid.410318.f0000 0004 0632 3409Department of Endocrinology, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053 China
| | - Liping Qiao
- grid.410318.f0000 0004 0632 3409Department of Endocrinology, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053 China
| | - Xiuyang Li
- grid.410318.f0000 0004 0632 3409Institute of Metabolic Diseases, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053 China
| | - Bing Pang
- grid.410318.f0000 0004 0632 3409Department of Endocrinology, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053 China
| | - Jiaran Lin
- grid.24695.3c0000 0001 1431 9176Clinical Medical College, Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Jia Wang
- grid.410318.f0000 0004 0632 3409General Department, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053 China
| | - Min Li
- grid.410318.f0000 0004 0632 3409Molecular Biology Laboratory, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053 China
| | - Xiaolin Tong
- grid.410318.f0000 0004 0632 3409Institute of Metabolic Diseases, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053 China
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10
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Jabbehdari S, Sallam AB. Gut microbiome and diabetic retinopathy. Eur J Ophthalmol 2022; 32:2494-2497. [PMID: 35266406 DOI: 10.1177/11206721221083068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
During the last decades, the incidence of diabetes and a variety of complications such as diabetic retinopathy (DR) and cardiovascular diseases have been increased exponentially. Gut bacterial composition -microbiota - has been associated with the pathobiology of many inflammatory and metabolic disorders such as diabetes. Gut microbiota plays a crucial role in preserving the metabolic and immune homeostasis, protecting against pathogens and regulating host immunity; however, gut microbiome ecosystem can be altered by lifestyle, cigarette smoking, dietary patterns, and oxidative stress.Herein, we present a hypothesis on the potential complex association between gut microbiota and DR as one of the microvascular complications of diabetes.
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Affiliation(s)
- Sayena Jabbehdari
- Jones Eye Institute, 12215University of Arkansas for Medical Sciences, Arkansas, USA
| | - Ahmed B Sallam
- Jones Eye Institute, 12215University of Arkansas for Medical Sciences, Arkansas, USA
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