1
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Zambre S, Bangar N, Mistry A, Katarmal P, Khan MS, Ahmed I, Tupe R, Roy B. Aldosterone, Methylglyoxal, and Glycated Albumin Interaction with Macrophage Cells Affects Their Viability, Activation, and Differentiation. ACS OMEGA 2024; 9:11848-11859. [PMID: 38497023 PMCID: PMC10938338 DOI: 10.1021/acsomega.3c09420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 02/06/2024] [Accepted: 02/13/2024] [Indexed: 03/19/2024]
Abstract
BACKGROUND The inflammatory response in diabetes is strongly correlated with increasing amounts of advanced glycation end products (AGEs), methylglyoxal (MGO), aldosterone (Aldo), and activation of macrophages. Aldo is known to be associated with increased pro-inflammatory responses in general, but its significance in inflammatory responses under glycated circumstances has yet to be understood. In the current work, the aim of our study was to study the macrophage immune response in the presence of AGEs, MGO, and Aldo to comprehend their combined impact on diabetes-associated complications. METHODS AND RESULTS The viability of macrophages upon treatment with glycated HSA (Gly-HSA) promoted cell growth as the concentration increased from 100 to 500 μg/mL, whereas MGO at a high concentration (≥300 μM) significantly hampered cell growth. At lower concentrations (0.5-5 nM), Aldo strongly promoted cell growth, whereas at higher concentrations (50 nM), it was seen to inhibit growth when used for cell treatment for 24 h. Aldo had no effect on MGO-induced cell growth inhibition after 24 h of treatment. However, compared to MGO or Aldo treatment alone, an additional decrease in viability could be seen after 48 h of treatment with a combination of MGO and Aldo. Treatment with Aldo and MGO induced expression of TNF-α independently and when combined. However, when combined, Aldo and MGO significantly suppressed the expression of TGF-β. Aldo, Gly-HSA, and MGO strongly induced the transcription of NF-κB and RAGE mRNA and, as expected, also promoted the formation of reactive oxygen species. Also, by inducing iNOS and MHC-II and suppressing CD206 transcript expression, Gly-HSA strongly favored the differentiation of macrophages into M1 type (pro-inflammatory). On the other hand, the combination of Aldo and MGO strongly induced the expression of MHC-II, CD206, and ARG1 (M2 macrophage marker). These findings suggest that Gly-HSA, MGO, and Aldo differently influence macrophage survival, activation, and differentiation. CONCLUSIONS Overall, this study gives an insight into the effects of glycated protein and MGO in the presence of Aldo on macrophage survival, activation, differentiation, and inflammatory response.
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Affiliation(s)
- Saee Zambre
- Symbiosis
School of Biological Sciences (SSBS), Symbiosis
International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
| | - Nilima Bangar
- Symbiosis
School of Biological Sciences (SSBS), Symbiosis
International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
| | - Armaan Mistry
- Symbiosis
School of Biological Sciences (SSBS), Symbiosis
International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
| | - Poonam Katarmal
- Symbiosis
School of Biological Sciences (SSBS), Symbiosis
International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
| | - Mohd Shahnawaz Khan
- Department
of Biochemistry, College of Science, King
Saud University, Riyadh 11451, Saudi Arabia
| | - Irshad Ahmed
- Department
of Biochemistry and Structural Biology, School of Medicine, UT Health Science Center, San Antonio, Texas 78229, United States
| | - Rashmi Tupe
- Symbiosis
School of Biological Sciences (SSBS), Symbiosis
International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
| | - Bishnudeo Roy
- Symbiosis
School of Biological Sciences (SSBS), Symbiosis
International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
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2
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Miebach L, Melo‐Zainzinger G, Freund E, Clemen R, Cecchini AL, Bekeschus S. Medical Gas Plasma Technology Combines with Antimelanoma Therapies and Promotes Immune-Checkpoint Therapy Responses. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2303183. [PMID: 37541287 PMCID: PMC10558686 DOI: 10.1002/advs.202303183] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/11/2023] [Indexed: 08/06/2023]
Abstract
Strategies to improve activity and selectivity are major goals in oncological drug development. Medical gas plasma therapy has been subject to intense research in dermatooncology recently. Based on partial gas ionization, this approach is exceptional in generating a variety of reactive oxygen species simultaneously that can be applied locally at the tumor side. It is hypothesized that combined gas plasma treatment can potentiate drug responses in the treatment of melanoma. Using a plasma jet approved as medical device in Europe, a systematic screening of 46 mitochondria-targeted drugs identifies five agents synergizing in vitro and in vivo. Increased intratumoral leucocyte infiltration points to immunomodulatory aspects of the treatment, motivating to investigate responses to immune checkpoint blockade in combination with plasma. Tumor growth is monitored based on bioluminescent imaging, and single-cell suspensions are retrieved from each tumor to characterize tumor-infiltrating leucocytes using multicolor flow cytometry. Gene expression profiling is done using a validated NanoString panel targeting 770 genes specifically designed for immuno-oncological research. Cell type abundancies are characterized from bulk RNA samples using the CIBERSORT computational framework. Collectively, the results indicate that local application of medical gas plasma technology synergizes with mitochondria-targeted drugs and anti-PD1 checkpoint therapy in treating melanoma.
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Affiliation(s)
- Lea Miebach
- Department of General, Thoracic, Vascular, and Visceral SurgeryGreifswald University Medical Center17475GreifswaldGermany
- ZIK plasmatisLeibniz Institute for Plasma Science and Technology (INP)17489GreifswaldGermany
| | - Gabriella Melo‐Zainzinger
- ZIK plasmatisLeibniz Institute for Plasma Science and Technology (INP)17489GreifswaldGermany
- Cancer Research UnitBoehringer IngelheimVienna1121Austria
| | - Eric Freund
- Department of General, Thoracic, Vascular, and Visceral SurgeryGreifswald University Medical Center17475GreifswaldGermany
- ZIK plasmatisLeibniz Institute for Plasma Science and Technology (INP)17489GreifswaldGermany
- Department of NeurosurgeryWien University Medical CenterVienna1090Austria
| | - Ramona Clemen
- ZIK plasmatisLeibniz Institute for Plasma Science and Technology (INP)17489GreifswaldGermany
| | | | - Sander Bekeschus
- ZIK plasmatisLeibniz Institute for Plasma Science and Technology (INP)17489GreifswaldGermany
- Clinic for Dermatology and VenerologyRostock University Medical Center18057RostockGermany
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3
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Harper EI, Siroky MD, Hilliard TS, Dominique GM, Hammond C, Liu Y, Yang J, Hubble VB, Walsh DJ, Melander RJ, Melander C, Ravosa MJ, Stack MS. Advanced Glycation End Products as a Potential Target for Restructuring the Ovarian Cancer Microenvironment: A Pilot Study. Int J Mol Sci 2023; 24:9804. [PMID: 37372952 PMCID: PMC10298212 DOI: 10.3390/ijms24129804] [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: 03/27/2023] [Revised: 05/25/2023] [Accepted: 05/31/2023] [Indexed: 06/29/2023] Open
Abstract
Ovarian cancer is the sixth leading cause of cancer-related death in women, and both occurrence and mortality are increased in women over the age of 60. There are documented age-related changes in the ovarian cancer microenvironment that have been shown to create a permissive metastatic niche, including the formation of advanced glycation end products, or AGEs, that form crosslinks between collagen molecules. Small molecules that disrupt AGEs, known as AGE breakers, have been examined in other diseases, but their efficacy in ovarian cancer has not been evaluated. The goal of this pilot study is to target age-related changes in the tumor microenvironment with the long-term aim of improving response to therapy in older patients. Here, we show that AGE breakers have the potential to change the omental collagen structure and modulate the peritoneal immune landscape, suggesting a potential use for AGE breakers in the treatment of ovarian cancer.
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Affiliation(s)
- Elizabeth I. Harper
- Integrated Biomedical Sciences Graduate Program, University of Notre Dame, Notre Dame, IN 46556, USA
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46617, USA
| | - Michael D. Siroky
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46617, USA
| | - Tyvette S. Hilliard
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46617, USA
| | - Gena M. Dominique
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46617, USA
| | - Catherine Hammond
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46617, USA
| | - Yueying Liu
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46617, USA
| | - Jing Yang
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46617, USA
| | - Veronica B. Hubble
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Danica J. Walsh
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Roberta J. Melander
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Christian Melander
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Matthew J. Ravosa
- Center for Functional Anatomy and Evolution, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - M. Sharon Stack
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46617, USA
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4
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Smith PK, Venter C, O’Mahony L, Canani RB, Lesslar OJL. Do advanced glycation end products contribute to food allergy? FRONTIERS IN ALLERGY 2023; 4:1148181. [PMID: 37081999 PMCID: PMC10111965 DOI: 10.3389/falgy.2023.1148181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 03/06/2023] [Indexed: 04/07/2023] Open
Abstract
Sugars can bind non-enzymatically to proteins, nucleic acids or lipids and form compounds called Advanced Glycation End Products (AGEs). Although AGEs can form in vivo, factors in the Western diet such as high amounts of added sugars, processing methods such as dehydration of proteins, high temperature sterilisation to extend shelf life, and cooking methods such as frying and microwaving (and reheating), can lead to inordinate levels of dietary AGEs. Dietary AGEs (dAGEs) have the capacity to bind to the Receptor for Advanced Glycation End Products (RAGE) which is part of the endogenous threat detection network. There are persuasive epidemiological and biochemical arguments that correlate the rise in food allergy in several Western countries with increases in dAGEs. The increased consumption of dAGEs is enmeshed in current theories of the aetiology of food allergy which will be discussed.
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Affiliation(s)
- P. K. Smith
- Clinical Medicine and Menzies School of Research, Griffith University, Gold Coast, QLD, Australia
- Correspondence: P. K. Smith
| | - C. Venter
- Children’s Hospital Colorado, University of Colorado, Aurora, CO, United States
| | - L. O’Mahony
- Department of Medicine, School of Microbiology, APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - R. Berni Canani
- Department of Translational Medical Science and ImmunoNutritionLab at CEINGE-Advanced Biotechnologies, University of Naples “Federico II”, Naples, Italy
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5
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Wang Q, Chen Z, Guo J, Peng X, Zheng Z, Chen H, Liu H, Ma Y, Zhu J. Atorvastatin-induced tolerogenic dendritic cells improve cardiac remodeling by suppressing TLR-4/NF-κB activation after myocardial infarction. Inflamm Res 2023; 72:13-25. [PMID: 36315279 DOI: 10.1007/s00011-022-01654-3] [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: 07/02/2022] [Accepted: 09/27/2022] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE Myocardial infarction (MI) caused by ischemic cardiomyocyte necrosis induces inflammatory responses that strongly affect ventricular remodeling. Tolerogenic dendritic cells (tDCs) can suppress this effect on inflammatory responses. However, the precise role of atorvastatin-induced tDCs in ventricular remodeling after MI remains unclear. METHODS To explore the effect of necrotic cardiomyocytes (SNC) and/or atorvastatin on DC function, the expression of CD40, CD80, CD86, and MHC-II was determined using flow cytometry. The protein levels of TLR-4/NF-κB-related molecules were evaluated using western blotting. The infarct area after MI was determined via 2,3,5-triphenyltetrazolium chloride staining. The TUNEL assay was employed to evaluate the apoptosis of cardiomyocytes in heart sections. Masson's trichrome method was used to determine the extent of fibrosis. RESULTS Compared to the DCs co-cultured with PBS (control), cells co-cultured with Supernatant-IM or Supernatant-NH produced higher levels of inflammatory cytokines, including TNF-α, IL-1, IL-6, IL-12P40, and IL-8. This cytokine production was impaired by atorvastatin treatment. SNC treatment induced DC maturation and enhanced inflammatory cytokine secretion and oxidative stress through TLR-4/NF-κB pathway activation. Compared to that in the PBS-treated group, the left ventricular ejection fraction was significantly improved after tDC treatment. Additionally, compared to that in the PBS-treated group, tDC treatment reduced the left ventricular end-diastolic and end-systolic diameters in mice. Furthermore, treatment with tDCs improved the left ventricular systolic function, attenuated inflammatory cell infiltration, and reduced cardiomyocyte apoptosis, myocardial fibrosis, and infarct size compared to those in the control group. CONCLUSIONS Adoptive transfer of atorvastatin-induced tDCs alleviated post-infarction cardiomyocyte apoptosis and myocardial fibrosis in association with decreased inflammatory cell infiltration and inhibited oxidative stress, likely by suppressing TLR-4/NF-κB activation after myocardial infarction.
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Affiliation(s)
- Qian Wang
- Department of Blood Transfusion, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, People's Republic of China
| | - Zhaoyang Chen
- Heart Center of Fujian Province, Union Hospital, Fujian Medical University, 29 Xin-Quan Road, Fuzhou, 350001, People's Republic of China
| | - Junjie Guo
- Department of Cardiology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, People's Republic of China.,Qingdao Municipal Key Laboratory of Hypertension, Qingdao, Shandong, People's Republic of China
| | - Xiaoping Peng
- Department of Cardiology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, People's Republic of China.,Jiangxi Hypertension Research Institute, Nanchang, People's Republic of China
| | - Zeqi Zheng
- Department of Cardiology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, People's Republic of China.,Jiangxi Hypertension Research Institute, Nanchang, People's Republic of China
| | - Hang Chen
- Heart Center of Fujian Province, Union Hospital, Fujian Medical University, 29 Xin-Quan Road, Fuzhou, 350001, People's Republic of China
| | - Haibo Liu
- Department of Cardiology, Qingpu Branch of Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai, 200032, People's Republic of China
| | - Yuanji Ma
- Department of Cardiology, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai, 200032, People's Republic of China
| | - Jianbing Zhu
- Department of Cardiology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, People's Republic of China. .,Jiangxi Hypertension Research Institute, Nanchang, People's Republic of China.
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6
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Shin U, You H, Lee GY, Son Y, Han SN. The effects of 1,25(OH) 2D 3 treatment on metabolic reprogramming and maturation in bone marrow-derived dendritic cells from control and diabetic mice. J Steroid Biochem Mol Biol 2023; 225:106197. [PMID: 36183994 DOI: 10.1016/j.jsbmb.2022.106197] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/17/2022] [Accepted: 09/26/2022] [Indexed: 02/01/2023]
Abstract
Activated dendritic cells (DCs) undergo significant metabolic reprogramming, which is characterized by an increase in aerobic glycolysis and a concurrent progressive loss of oxidative phosphorylation. The modulation of metabolic reprogramming is believed to be closely related to the function of DCs. Vitamin D has been reported to inhibit the maturation of DCs. DC dysfunction has been reported in diabetic patients, and hyperglycemia is associated with impaired glycolytic metabolism in immune cells. Therefore, vitamin D and diabetes may affect intracellular metabolism, thereby regulating the activity of DCs. We investigated the effect of in vitro treatment of 1,25-dihydroxyvitamin D3 (1,25(OH)2D3) on metabolic reprogramming and maturation of bone marrow-derived dendritic cells (BMDCs) from diabetic mouse. Six-week-old male C57BLKS/J-m+/m+ mice (CON) and C57BLKS/J-db/db mice (db/db) were fed with a 10% kcal fat diet for seven weeks. BMDCs were generated by culturing bone marrow cells from the mice with rmGM-CSF (20 ng/mL) in the absence or presence of 10 nM 1,25(OH)2D3. The maturation of BMDCs was induced via lipopolysaccharide (LPS, 50 ng/mL) stimulation for 24 h. LPS stimulation induced iNOS protein expression and decreased the mitochondrial respiration, while increased lactate production and the expression of glycolytic pathway-related genes (Glut1 and Pfkfb3) in BMDCs from both CON and db/db groups. In LPS-stimulated mature BMDCs, 1,25(OH)2D3 treatment decreased the expression of surface markers related to immunostimulatory functions (MHC class II, CD80, CD86, and CD40) and production of IL-12p70 in both CON and db/db groups. While the mRNA level of the gene related to glucose uptake (Glut1) was increased in both groups, lactate production was decreased by 1,25(OH)2D3 treatment. mTORC1 activity was suppressed following 1,25(OH)2D3 treatment. Collectively, our findings confirmed that metabolic reprogramming occurred in BMDCs following LPS stimulation. In vitro 1,25(OH)2D3 treatment induced tolerogenic phenotypes by reducing the expression of surface markers, as well as cytokine production. However, no significant difference was observed regarding the effects of 1,25(OH)2D3 treatment on metabolic conversion and maturation of BMDCs between the control and diabetic mice. Additionally, the decreased aerobic glycolysis induced by the 1,25(OH)2D3 treatment appeared to be associated with the diminished maturation of BMDCs, and mTORC1 appears to play a key role in the 1,25(OH)2D3-mediated regulation of glycolysis.
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Affiliation(s)
- Ungue Shin
- Department of Food and Nutrition, Seoul National University, Seoul, the Republic of Korea.
| | - Hyeyoung You
- Department of Food and Nutrition, Seoul National University, Seoul, the Republic of Korea.
| | - Ga Young Lee
- Department of Food and Nutrition, Seoul National University, Seoul, the Republic of Korea.
| | - YeKyoung Son
- Department of Food and Nutrition, Seoul National University, Seoul, the Republic of Korea.
| | - Sung Nim Han
- Department of Food and Nutrition, Seoul National University, Seoul, the Republic of Korea; Research Institute of Human Ecology, Seoul National University, Seoul, the Republic of Korea.
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7
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Liu F, Liu C, Lee IXY, Lin MTY, Liu YC. Corneal dendritic cells in diabetes mellitus: A narrative review. Front Endocrinol (Lausanne) 2023; 14:1078660. [PMID: 36777336 PMCID: PMC9911453 DOI: 10.3389/fendo.2023.1078660] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 01/12/2023] [Indexed: 01/28/2023] Open
Abstract
Diabetes mellitus is a global public health problem with both macrovascular and microvascular complications, such as diabetic corneal neuropathy (DCN). Using in-vivo confocal microscopy, corneal nerve changes in DCN patients can be examined. Additionally, changes in the morphology and quantity of corneal dendritic cells (DCs) in diabetic corneas have also been observed. DCs are bone marrow-derived antigen-presenting cells that serve both immunological and non-immunological roles in human corneas. However, the role and pathogenesis of corneal DC in diabetic corneas have not been well understood. In this article, we provide a comprehensive review of both animal and clinical studies that report changes in DCs, including the DC density, maturation stages, as well as relationships between the corneal DCs, corneal nerves, and corneal epithelium, in diabetic corneas. We have also discussed the associations between the changes in corneal DCs and various clinical or imaging parameters, including age, corneal nerve status, and blood metabolic parameters. Such information would provide valuable insight into the development of diagnostic, preventive, and therapeutic strategies for DM-associated ocular surface complications.
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Affiliation(s)
- Fengyi Liu
- University of Cambridge, Girton College, Cambridgeshire, United Kingdom
| | - Chang Liu
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore
- Tissue Engineering and Cell Therapy Group, Singapore Eye Research Institute, Singapore, Singapore
| | - Isabelle Xin Yu Lee
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore
- Tissue Engineering and Cell Therapy Group, Singapore Eye Research Institute, Singapore, Singapore
| | - Molly Tzu Yu Lin
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore
- Tissue Engineering and Cell Therapy Group, Singapore Eye Research Institute, Singapore, Singapore
| | - Yu-Chi Liu
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore
- Tissue Engineering and Cell Therapy Group, Singapore Eye Research Institute, Singapore, Singapore
- Cornea and Refractive Surgery Group, Singapore Eye Research Institute, Singapore, Singapore
- Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
- Department of Ophthalmology, National Taiwan University, Taipei, Taiwan
- *Correspondence: Yu-Chi Liu,
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8
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Zhao L, Li Y, Xu T, Lv Q, Bi X, Liu X, Fu G, Zou Y, Ge J, Chen Z, Zhang W. Dendritic cell-mediated chronic low-grade inflammation is regulated by the RAGE-TLR4-PKCβ 1 signaling pathway in diabetic atherosclerosis. Mol Med 2022; 28:4. [PMID: 35062863 PMCID: PMC8780245 DOI: 10.1186/s10020-022-00431-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 01/03/2022] [Indexed: 11/16/2022] Open
Abstract
Background The unique mechanism of diabetic atherosclerosis has been a central research focus. Previous literature has reported that the inflammatory response mediated by dendritic cells (DCs) plays a vital role in the progression of atherosclerosis. The objective of the study was to explore the role of DCs in diabetes mellitus complicated by atherosclerosis. Methods ApoE−/− mice and bone marrow-derived DCs were used for in vivo and in vitro experiments, respectively. Masson’s staining and Oil-red-O staining were performed for atherosclerotic lesion assessment. The content of macrophages and DCs in plaque was visualized by immunohistochemistry. The expression of CD83 and CD86 were detected by flow cytometry. The fluctuations in the RNA levels of cytokines, chemokines, chemokine receptors and adhesions were analyzed by quantitative RT-PCR. The concentrations of IFN-γ and TNF-α were calculated using ELISA kits and the proteins were detected using western blot. Coimmunoprecipitation was used to detect protein–protein interactions. Results Compared with the ApoE−/− group, the volume of atherosclerotic plaques in the aortic root of diabetic ApoE−/− mice was significantly increased, numbers of macrophages and DCs were increased, and the collagen content in plaques decreased. The expression of CD83 and CD86 were significantly upregulated in splenic CD11c+ DCs derived from mice with hyperglycemia. Increased secretion of cytokines, chemokines, chemokine receptors, intercellular cell adhesion molecule (ICAM), and vascular cell adhesion molecule (VCAM) also were observed. The stimulation of advanced glycation end products plus oxidized low-density lipoprotein, in cultured BMDCs, further activated toll-like receptor 4, protein kinase C and receptor of AGEs, and induced immune maturation of DCs through the RAGE-TLR4-PKCβ1 signaling pathway that was bound together by intrinsic structures on the cell membrane. Administering LY333531 significantly increased the body weight of diabetic ApoE−/− mice, inhibited the immune maturation of spleen DCs, and reduced atherosclerotic plaques in diabetic ApoE−/− mice. Furthermore, the number of DCs and macrophages in atherosclerotic plaques was significantly reduced in the LY333531 group, and the collagen content was increased. Conclusions Diabetes mellitus aggravates chronic inflammation, and promotes atherosclerotic plaques in conjunction with hyperlipidemia, which at least in part through inducing the immune maturation of DCs, and its possible mechanism of action is through the RAGE-TLR4-pPKCβ1 signaling pathway. Supplementary Information The online version contains supplementary material available at 10.1186/s10020-022-00431-6.
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Affiliation(s)
- Liding Zhao
- Department of Cardiovascular Diseases, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, No 3 East of Qinchun Road, Hangzhou, Zhejiang, 310000, People's Republic of China.,Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Hangzhou, Zhejiang, People's Republic of China
| | - Ya Li
- Department of Cardiovascular Diseases, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, No 3 East of Qinchun Road, Hangzhou, Zhejiang, 310000, People's Republic of China.,Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Hangzhou, Zhejiang, People's Republic of China
| | - Tian Xu
- Department of Cardiovascular Diseases, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, No 3 East of Qinchun Road, Hangzhou, Zhejiang, 310000, People's Republic of China.,Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Hangzhou, Zhejiang, People's Republic of China
| | - Qingbo Lv
- Department of Cardiovascular Diseases, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, No 3 East of Qinchun Road, Hangzhou, Zhejiang, 310000, People's Republic of China.,Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Hangzhou, Zhejiang, People's Republic of China
| | - Xukun Bi
- Department of Cardiovascular Diseases, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, No 3 East of Qinchun Road, Hangzhou, Zhejiang, 310000, People's Republic of China.,Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Hangzhou, Zhejiang, People's Republic of China
| | - Xianglan Liu
- Department of Cardiovascular Diseases, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, No 3 East of Qinchun Road, Hangzhou, Zhejiang, 310000, People's Republic of China.,Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Hangzhou, Zhejiang, People's Republic of China
| | - Guosheng Fu
- Department of Cardiovascular Diseases, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, No 3 East of Qinchun Road, Hangzhou, Zhejiang, 310000, People's Republic of China.,Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Hangzhou, Zhejiang, People's Republic of China
| | - Yunzeng Zou
- Shanghai Institute of Cardiovascular Diseases of Zhongshan Hospital, Fudan University, Shanghai, China.,Institute of Biomedical Science, Fudan University, Shanghai, China
| | - Junbo Ge
- Shanghai Institute of Cardiovascular Diseases of Zhongshan Hospital, Fudan University, Shanghai, China.,Institute of Biomedical Science, Fudan University, Shanghai, China
| | - Zhaoyang Chen
- Heart Center of Fujian Province, Union Hospital, Fujian Medical University, 29 Xin-Quan Road, Fuzhou, 350001, People's Republic of China.
| | - Wenbin Zhang
- Department of Cardiovascular Diseases, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, No 3 East of Qinchun Road, Hangzhou, Zhejiang, 310000, People's Republic of China. .,Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Hangzhou, Zhejiang, People's Republic of China.
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9
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Receptor Mediated Effects of Advanced Glycation End Products (AGEs) on Innate and Adaptative Immunity: Relevance for Food Allergy. Nutrients 2022; 14:nu14020371. [PMID: 35057553 PMCID: PMC8778532 DOI: 10.3390/nu14020371] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/07/2022] [Accepted: 01/13/2022] [Indexed: 12/11/2022] Open
Abstract
As of late, evidence has been emerging that the Maillard reaction (MR, also referred to as glycation) affects the structure and function of food proteins. MR induces the conformational and chemical modification of food proteins, not only on the level of IgG/IgE recognition, but also by increasing the interaction and recognition of these modified proteins by antigen-presenting cells (APCs). This affects their biological properties, including digestibility, bioavailability, immunogenicity, and ultimately their allergenicity. APCs possess various receptors that recognize glycation structures, which include receptor for advanced glycation end products (RAGE), scavenger receptors (SRs), galectin-3 and CD36. Through these receptors, glycation structures may influence the recognition, uptake and antigen-processing of food allergens by dendritic cells (DCs) and monocytes. This may lead to enhanced cytokine production and maturation of DCs, and may also induce adaptive immune responses to the antigens/allergens as a result of antigen uptake, processing and presentation to T cells. Here, we aim to review the current literature on the immunogenicity of AGEs originating from food (exogenous or dietary AGEs) in relation to AGEs that are formed within the body (endogenous AGEs), their interactions with receptors present on immune cells, and their effects on the activation of the innate as well as the adaptive immune system. Finally, we review the clinical relevance of AGEs in food allergies.
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10
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Zhang P, Yang CL, Du T, Liu YD, Ge MR, Li H, Liu RT, Wang CC, Dou YC, Duan RS. Diabetes mellitus exacerbates experimental autoimmune myasthenia gravis via modulating both adaptive and innate immunity. J Neuroinflammation 2021; 18:244. [PMID: 34702288 PMCID: PMC8549151 DOI: 10.1186/s12974-021-02298-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 10/17/2021] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Diabetes mellitus (DM) is a common concomitant disease of late-onset myasthenia gravis (MG). However, the impacts of DM on the progression of late-onset MG were unclear. METHODS In this study, we examined the immune response in experimental autoimmune myasthenia gravis (EAMG) rats with DM or not. The phenotype and function of the spleen and lymph nodes were determined by flow cytometry. The serum antibodies, Tfh cells, and germinal center B cells were determined by ELISA and flow cytometry. The roles of advanced glycation end products (AGEs) in regulating Tfh cells were further explored in vitro by co-culture assays. RESULTS Our results indicated clinical scores of EAMG rats were worse in diabetes rats compared to control, which was due to the increased production of anti-R97-116 antibody and antibody-secreting cells. Furthermore, diabetes induced a significant upregulation of Tfh cells and the subtypes of Tfh1 and Tfh17 cells to provide assistance for antibody production. The total percentages of B cells were increased with an activated statue of improved expression of costimulatory molecules CD80 and CD86. We found CD4+ T-cell differentiation was shifted from Treg cells towards Th1/Th17 in the DM+EAMG group compared to the EAMG group. In addition, in innate immunity, diabetic EAMG rats displayed more CXCR5 expression on NK cells. However, the expression of CXCR5 on NKT cells was down-regulated with the increased percentages of NKT cells in the DM+EAMG group. Ex vivo studies further indicated that Tfh cells were upregulated by AGEs instead of hyperglycemia. The upregulation was mediated by the existence of B cells, the mechanism of which might be attributed the elevated molecule CD40 on B cells. CONCLUSIONS Diabetes promoted both adaptive and innate immunity and exacerbated clinical symptoms in EAMG rats. Considering the effect of diabetes, therapy in reducing blood glucose levels in MG patients might improve clinical efficacy through suppressing the both innate and adaptive immune responses. Additional studies are needed to confirm the effect of glucose or AGEs reduction to seek treatment for MG.
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Affiliation(s)
- Peng Zhang
- Department of Neurology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, No. 16766, Jingshi Road, Jinan, 250014, People's Republic of China.,Shandong Institute of Neuroimmunology, Jinan, 250014, People's Republic of China.,Shandong Key Laboratory for Rheumatic Disease and Translational Medicine, Jinan, 250014, People's Republic of China
| | - Chun-Lin Yang
- Department of Neurology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, No. 16766, Jingshi Road, Jinan, 250014, People's Republic of China.,Shandong Institute of Neuroimmunology, Jinan, 250014, People's Republic of China.,Shandong Key Laboratory for Rheumatic Disease and Translational Medicine, Jinan, 250014, People's Republic of China
| | - Tong Du
- Department of Neurology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, No. 16766, Jingshi Road, Jinan, 250014, People's Republic of China.,Shandong Institute of Neuroimmunology, Jinan, 250014, People's Republic of China.,Shandong Key Laboratory for Rheumatic Disease and Translational Medicine, Jinan, 250014, People's Republic of China
| | - Yu-Dong Liu
- Department of Neurology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, No. 16766, Jingshi Road, Jinan, 250014, People's Republic of China.,Shandong Institute of Neuroimmunology, Jinan, 250014, People's Republic of China.,Shandong Key Laboratory for Rheumatic Disease and Translational Medicine, Jinan, 250014, People's Republic of China
| | - Meng-Ru Ge
- Department of Neurology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, No. 16766, Jingshi Road, Jinan, 250014, People's Republic of China.,School of Medicine, Tongji University, Shanghai, 200092, People's Republic of China
| | - Heng Li
- Department of Neurology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, No. 16766, Jingshi Road, Jinan, 250014, People's Republic of China.,Shandong Institute of Neuroimmunology, Jinan, 250014, People's Republic of China.,Shandong Key Laboratory for Rheumatic Disease and Translational Medicine, Jinan, 250014, People's Republic of China
| | - Ru-Tao Liu
- Department of Neurology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, No. 16766, Jingshi Road, Jinan, 250014, People's Republic of China.,Shandong Institute of Neuroimmunology, Jinan, 250014, People's Republic of China.,Shandong Key Laboratory for Rheumatic Disease and Translational Medicine, Jinan, 250014, People's Republic of China
| | - Cong-Cong Wang
- Department of Neurology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, No. 16766, Jingshi Road, Jinan, 250014, People's Republic of China.,Shandong Institute of Neuroimmunology, Jinan, 250014, People's Republic of China.,Shandong Key Laboratory for Rheumatic Disease and Translational Medicine, Jinan, 250014, People's Republic of China
| | - Ying-Chun Dou
- College of Basic Medical Sciences, Shandong University of Traditional Chinese Medicine, Jinan, 250355, People's Republic of China
| | - Rui-Sheng Duan
- Department of Neurology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, No. 16766, Jingshi Road, Jinan, 250014, People's Republic of China. .,Shandong Institute of Neuroimmunology, Jinan, 250014, People's Republic of China. .,Shandong Key Laboratory for Rheumatic Disease and Translational Medicine, Jinan, 250014, People's Republic of China.
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11
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Role of Dendritic Cell in Diabetic Nephropathy. Int J Mol Sci 2021; 22:ijms22147554. [PMID: 34299173 PMCID: PMC8308035 DOI: 10.3390/ijms22147554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/09/2021] [Accepted: 07/10/2021] [Indexed: 11/18/2022] Open
Abstract
Diabetic nephropathy (DN) is one of the most significant microvascular complications in diabetic patients. DN is the leading cause of end-stage renal disease, accounting for approximately 50% of incident cases. The current treatment options, such as optimal control of hyperglycemia and elevated blood pressure, are insufficient to prevent its progression. DN has been considered as a nonimmune, metabolic, or hemodynamic glomerular disease initiated by hyperglycemia. However, recent studies suggest that DN is an inflammatory disease, and immune cells related with innate and adaptive immunity, such as macrophage and T cells, might be involved in its development and progression. Although it has been revealed that kidney dendritic cells (DCs) accumulation in the renal tissue of human and animal models of DN require activated T cells in the kidney disease, little is known about the function of DCs in DN. In this review, we describe kidney DCs and their subsets, and the role in the pathogenesis of DN. We also suggest how to improve the kidney outcomes by modulating kidney DCs optimally in the patients with DN.
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12
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Ying L, Benjanuwattra J, Chattipakorn SC, Chattipakorn N. The role of RIPK3-regulated cell death pathways and necroptosis in the pathogenesis of cardiac ischaemia-reperfusion injury. Acta Physiol (Oxf) 2021; 231:e13541. [PMID: 32687661 DOI: 10.1111/apha.13541] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2008] [Revised: 07/14/2020] [Accepted: 07/14/2020] [Indexed: 12/16/2022]
Abstract
Despite advancements in management of acute myocardial infarction, this disease remains one of the leading causes of death. Timely reestablishment of epicardial coronary blood flow is the cornerstone of therapy; however, substantial amount of damage can occur as a consequence of cardiac ischaemia/reperfusion (I/R) injury. It has been previously proposed that the pathway leading to major cell death, apoptosis, is responsible for cardiac I/R injury. Nevertheless, there is compelling evidence to suggest that necroptosis, a programmed necrosis, contributes remarkably to both myocardial injury and microcirculatory dysfunction following cardiac I/R injury. Receptor-interacting protein kinase 1 (RIPK1), RIPK3, and mixed-lineage kinase domain-like pseudokinase (MLKL) are shown as the major mediators of necroptosis. In addition to the traditional perception that RIPK1/RIPK3/MLKL-dependent plasma membrane rupture is fundamental to this process, several RIPK3-related pathways such as endoplasmic reticulum stress and mitochondrial fragmentation have also been implicated in cardiac I/R injury. In this review, reports from both in vitro and in vivo studies regarding the roles of necroptosis and RIPK3-regulated necrosis in cardiac I/R injury have been collectively summarized and discussed. Furthermore, reports on potential interventions targeting these processes to attenuate cardiac I/R insults to the heart have been presented in this review. Future investigations adding to the knowledge obtained from these previous studies are needed in the pursuit of discovering the most effective pharmacological agent to improve cardiac I/R outcomes.
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Affiliation(s)
- Luo Ying
- Cardiac Electrophysiology Research and Training Center Faculty of Medicine Chiang Mai University Chiang Mai Thailand
- Center of Excellence in Cardiac Electrophysiology Research Chiang Mai University Chiang Mai Thailand
- Cardiac Electrophysiology Unit Department of Physiology Faculty of Medicine Chiang Mai University Chiang Mai Thailand
| | - Juthipong Benjanuwattra
- Cardiac Electrophysiology Research and Training Center Faculty of Medicine Chiang Mai University Chiang Mai Thailand
- Center of Excellence in Cardiac Electrophysiology Research Chiang Mai University Chiang Mai Thailand
| | - Siriporn C. Chattipakorn
- Cardiac Electrophysiology Research and Training Center Faculty of Medicine Chiang Mai University Chiang Mai Thailand
- Center of Excellence in Cardiac Electrophysiology Research Chiang Mai University Chiang Mai Thailand
| | - Nipon Chattipakorn
- Cardiac Electrophysiology Research and Training Center Faculty of Medicine Chiang Mai University Chiang Mai Thailand
- Center of Excellence in Cardiac Electrophysiology Research Chiang Mai University Chiang Mai Thailand
- Cardiac Electrophysiology Unit Department of Physiology Faculty of Medicine Chiang Mai University Chiang Mai Thailand
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13
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Zhou Y, Chi J, Lv W, Wang Y. Obesity and diabetes as high-risk factors for severe coronavirus disease 2019 (Covid-19). Diabetes Metab Res Rev 2021; 37:e3377. [PMID: 32588943 PMCID: PMC7361201 DOI: 10.1002/dmrr.3377] [Citation(s) in RCA: 286] [Impact Index Per Article: 95.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/04/2020] [Accepted: 06/22/2020] [Indexed: 01/08/2023]
Abstract
The outbreak of the coronavirus disease 2019 (Covid-19) has become an evolving worldwide health crisis. With the rising prevalence of obesity and diabetes has come an increasing awareness of their impacts on infectious diseases, including increased risk for various infections, post-infection complications and mortality from critical infections. Although epidemiological and clinical characteristics of Covid-19 have been constantly reported, no article has systematically illustrated the role of obesity and diabetes in Covid-19, or how Covid-19 affects obesity and diabetes, or special treatment in these at-risk populations. Here, we present a synthesis of the recent advances in our understanding of the relationships between obesity, diabetes and Covid-19 along with the underlying mechanisms, and provide special treatment guidance for these at-risk populations.
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Affiliation(s)
- Yue Zhou
- Department of EndocrinologyAffiliated Hospital of Medical College Qingdao UniversityQingdaoChina
| | - Jingwei Chi
- Department of EndocrinologyAffiliated Hospital of Medical College Qingdao UniversityQingdaoChina
| | - Wenshan Lv
- Department of EndocrinologyAffiliated Hospital of Medical College Qingdao UniversityQingdaoChina
| | - Yangang Wang
- Department of EndocrinologyAffiliated Hospital of Medical College Qingdao UniversityQingdaoChina
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14
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Sarron E, Pérot M, Barbezier N, Delayre-Orthez C, Gay-Quéheillard J, Anton PM. Early exposure to food contaminants reshapes maturation of the human brain-gut-microbiota axis. World J Gastroenterol 2020; 26:3145-3169. [PMID: 32684732 PMCID: PMC7336325 DOI: 10.3748/wjg.v26.i23.3145] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 05/12/2020] [Accepted: 05/30/2020] [Indexed: 02/06/2023] Open
Abstract
Early childhood growth and development is conditioned by the consecutive events belonging to perinatal programming. This critical window of life will be very sensitive to any event altering programming of the main body functions. Programming of gut function, which is starting right after conception, relates to a very well-established series of cellular and molecular events associating all types of cells present in this organ, including neurons, endocrine and immune cells. At birth, this machinery continues to settle with the establishment of extra connection between enteric and other systemic systems and is partially under the control of gut microbiota activity, itself being under the densification and the diversification of microorganisms' population. As thus, any environmental factor interfering on this pre-established program may have a strong incidence on body functions. For all these reasons, pregnant women, fetuses and infants will be particularly susceptible to environmental factors and especially food contaminants. In this review, we will summarize the actual understanding of the consequences of repeated low-level exposure to major food contaminants on gut homeostasis settlement and on brain/gut axis communication considering the pivotal role played by the gut microbiota during the fetal and postnatal stages and the presumed consequences of these food toxicants on the individuals especially in relation with the risks of developing later in life non-communicable chronic diseases.
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Affiliation(s)
- Elodie Sarron
- Transformations and Agroressources (EA 7519), Institut Polytechnique UniLaSalle, Université d'Artois, Beauvais 60026, France
| | - Maxime Pérot
- Transformations and Agroressources (EA 7519), Institut Polytechnique UniLaSalle, Université d'Artois, Beauvais 60026, France
| | - Nicolas Barbezier
- Transformations and Agroressources (EA 7519), Institut Polytechnique UniLaSalle, Université d'Artois, Beauvais 60026, France
| | - Carine Delayre-Orthez
- Transformations and Agroressources (EA 7519), Institut Polytechnique UniLaSalle, Université d'Artois, Beauvais 60026, France
| | - Jérôme Gay-Quéheillard
- Périnatalité et risques Toxiques, UMR-I-01, Université de Picardie Jules Verne, Amiens 80000, France
| | - Pauline M Anton
- Transformations and Agroressources (EA 7519), Institut Polytechnique UniLaSalle, Université d'Artois, Beauvais 60026, France
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15
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Yang J, Zhang F, Shi H, Gao Y, Dong Z, Ma L, Sun X, Li X, Chang S, Wang Z, Qu Y, Li H, Hu K, Sun A, Ge J. Neutrophil-derived advanced glycation end products-Nε-(carboxymethyl) lysine promotes RIP3-mediated myocardial necroptosis via RAGE and exacerbates myocardial ischemia/reperfusion injury. FASEB J 2019; 33:14410-14422. [PMID: 31665609 DOI: 10.1096/fj.201900115rr] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Nε-(carboxymethyl) lysine (CML), the major member of advanced glycation end products, was widely studied in diabetic complications and aging-associated diseases. However, the impact of CML on myocardial ischemia/reperfusion injury (MI/RI) was rarely reported. In the present study, CML was increased in both patients with acute myocardial infarction (53.4 ± 7.8 vs. 28.1 ± 4.4 ng; P = 0.017), and mice underwent MI/RI (16.4 ± 1.4 vs. 10.8 ± 0.9 ng; P = 0.006). Depletion of neutrophils reduced CML (17.8 ± 1.0 vs. 9.9 ± 0.3 ng; P < 0.001), indicating neutrophils were the major cells contributing to CML formation during MI/RI. CML treatment exacerbated MI/RI by elevating myocardial injury marker (274.3 ± 18.0 vs. 477.2 ± 34.3 pg; P < 0.001), enlarging myocardial infarct size (32.9 ± 3.6 vs. 45.2 ± 3.8%; P = 0.03), increasing myocardial fibrosis (17.5 ± 1.6 vs. 29.7 ± 2.2%; P < 0.001) and impairing cardiac function (59.4 ± 2.4% vs. 46.0 ± 1.3%; P = 0.001). Further study revealed that CML increased the phosphorylation of receptor interacting protein (RIP) 3, an important initiator of necroptosis, and its downstream proteins. Receptor for advanced glycation end product (RAGE) deficiency effectively blocked RIP3 phosphorylation induced by CML and rescued CML-mediated MI/RI, indicating CML promoted RIP3-mediated necroptosis through RAGE. In addition, glyoxalase-1 overexpression could effectively attenuate MI/RI by reducing CML formation, providing a potential therapeutic target for MI/RI.-Yang, J., Zhang, F., Shi, H., Gao, Y., Dong, Z., Ma, L., Sun, X., Li, X., Chang, S., Wang, Z., Qu, Y., Li, H., Hu, K., Sun, A., Ge, J. Neutrophil-derived advanced glycation end products-Nε-(carboxymethyl) lysine promotes RIP3-mediated myocardial necroptosis via RAGE and exacerbates myocardial ischemia/reperfusion injury.
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Affiliation(s)
- Ji'e Yang
- Department of Cardiology, Zhongshan Hospital, Institute of Cardiovascular Diseases, Fudan University, Shanghai, China
| | - Feng Zhang
- Department of Cardiology, Zhongshan Hospital, Institute of Cardiovascular Diseases, Fudan University, Shanghai, China
| | - Huairui Shi
- Department of Cardiology, Zhongshan Hospital, Institute of Cardiovascular Diseases, Fudan University, Shanghai, China
| | - Yang Gao
- Department of Cardiology, Zhongshan Hospital, Institute of Cardiovascular Diseases, Fudan University, Shanghai, China
| | - Zhen Dong
- Department of Cardiology, Zhongshan Hospital, Institute of Cardiovascular Diseases, Fudan University, Shanghai, China
| | - Leilei Ma
- Department of Cardiology, Zhongshan Hospital, Institute of Cardiovascular Diseases, Fudan University, Shanghai, China
| | - Xiaolei Sun
- Institute of Biomedical Science, Fudan University, Shanghai, China
| | - Xiao Li
- Institute of Biomedical Science, Fudan University, Shanghai, China
| | - Suchi Chang
- Department of Cardiology, Zhongshan Hospital, Institute of Cardiovascular Diseases, Fudan University, Shanghai, China
| | - Zeng Wang
- Institute of Biomedical Science, Fudan University, Shanghai, China
| | - Yanan Qu
- Department of Cardiology, Zhongshan Hospital, Institute of Cardiovascular Diseases, Fudan University, Shanghai, China
| | - Hua Li
- Institute of Biomedical Science, Fudan University, Shanghai, China
| | - Kai Hu
- Department of Cardiology, Zhongshan Hospital, Institute of Cardiovascular Diseases, Fudan University, Shanghai, China
| | - Aijun Sun
- Department of Cardiology, Zhongshan Hospital, Institute of Cardiovascular Diseases, Fudan University, Shanghai, China.,Institute of Biomedical Science, Fudan University, Shanghai, China
| | - Junbo Ge
- Department of Cardiology, Zhongshan Hospital, Institute of Cardiovascular Diseases, Fudan University, Shanghai, China.,Institute of Biomedical Science, Fudan University, Shanghai, China
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16
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Li YH, Zhang WL, Zhou HY, Yu DW, Sun XN, Hu Q. Halofuginone protects against advanced glycation end products‑induced injury of H9C2 cells via alleviating endoplasmic reticulum stress‑associated apoptosis and inducing autophagy. Mol Med Rep 2019; 20:3131-3139. [PMID: 31432112 PMCID: PMC6755159 DOI: 10.3892/mmr.2019.10554] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 08/22/2018] [Indexed: 01/07/2023] Open
Abstract
Advanced glycation end products (AGEs) have been reported to serve an important role in the stiffening of cardiac tissues and myocardial cell injury. Serious myocardial cell injury can result in various heart diseases with high mortality. Halofuginone (HF), which possesses marked anti-inflammatory and antifibrotic effects, has recently been applied to inhibit the effects of cardiac stress. The present study aimed to investigate the potential effects of HF and its underlying mechanism in the treatment of AGEs-induced H9C2 cardiomyocyte damage. The western blot results of the present study demonstrated that HF may reduce the expression levels of myocardial injury markers, including myoglobin, creatine kinase MB and cardiac troponin I. In addition, flow cytometric analysis indicated that the production of reactive oxygen species (ROS) was significantly decreased by HF. Additionally, endoplasmic reticulum (ER) stress was suppressed in response to treatment with HF, as observed by low expression levels of ER stress-associated proapoptotic proteins (CCAAT/enhancer-binding protein homologous protein and cleaved caspase-12); overexpression of prosurvival proteins (growth arrest and DNA damage-inducible protein GADD34 and binding immunoglobulin protein) was also reported. Furthermore, the expression levels of microtubule-associated proteins 1A/1B light chain 3B (LC3)II/LC3I and Beclin 1 were elevated, whereas P62 expression levels were reduced following treatment with HF. These findings, together with immunofluorescence staining of LC3, indicated that HF may induce autophagy. Finally, the protective effects of HF on AGEs-treated H9C2 cells were reversed following treatment with the inhibitor 3-methyladenine, as indicated by inhibition of autophagy, and increases in apoptosis, ROS production and the ER stress response. Collectively, the findings of the present study suggested that the protective effects of HF against AGEs-induced myocardial cell injury may be associated with the induction of autophagy and amelioration of ROS-mediated ER stress and apoptosis. These findings may contribute to the development of a novel therapeutic method to inhibit the progression of myocardial cell injury.
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Affiliation(s)
- Yu-Hui Li
- Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong 250012, P.R. China
| | - Wei-Li Zhang
- Department of Cardiology, Yantaishan Hospital, Yantai, Shandong 264001, P.R. China
| | - Hao-Ying Zhou
- Department of Thoracic Surgery, People's Hospital of Zhejiang Province, Hangzhou, Zhejiang 310014, P.R. China
| | - Da-Wei Yu
- Department of Cardiology, Yantaishan Hospital, Yantai, Shandong 264001, P.R. China
| | - Xiao-Ning Sun
- Department of Nephrology, Yantaishan Hospital, Yantai, Shandong 264001, P.R. China
| | - Qin Hu
- Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong 250012, P.R. China
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17
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Jaiswal N, Agrawal S, Agrawal A. High fructose-induced metabolic changes enhance inflammation in human dendritic cells. Clin Exp Immunol 2019; 197:237-249. [PMID: 30919933 DOI: 10.1111/cei.13299] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/25/2019] [Indexed: 12/25/2022] Open
Abstract
Dendritic cells (DCs) are critical antigen-presenting cells which are the initiators and regulators of the immune response. Numerous studies support the idea that dietary sugars influence DC functions. Increased consumption of fructose has been thought to be the leading cause of metabolic disorders. Although evidence supports their association with immune dysfunction, the specific mechanisms are not well understood. Fructose is one of the main dietary sugars in our diet. Therefore, here we compared the effect of fructose and glucose on the functions of human DCs. High levels of D-fructose compared to D-glucose led to activation of DCs in vitro by promoting interleukin (IL)-6 and IL-1β production. Moreover, fructose exposed DCs also induced interferon (IFN)-γ secretion from T cells. Proinflammatory response of DCs in high fructose environment was found to be independent of the major known metabolic regulators or glycolytic control. Instead, DC activation on acute exposure to fructose was via activation of receptor for advanced glycation end product (RAGE) in response to increased accumulation of advanced glycation end products (AGE). However, chronic exposure of DCs to high fructose environment induced a shift towards glycolysis compared to glucose cultured DCs. Further investigations revealed that the AGEs formed by fructose induced increased levels of inflammatory cytokines in DCs compared to AGEs from glucose. In summary, understanding the link between metabolic changes and fructose-induced DC activation compared to glucose has broad implications for immune dysfunction associated with metabolic disorders.
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Affiliation(s)
- N Jaiswal
- Division of Basic and Clinical Immunology, Department of Medicine, University of California, Irvine, Irvine, CA, USA
| | - S Agrawal
- Division of Basic and Clinical Immunology, Department of Medicine, University of California, Irvine, Irvine, CA, USA
| | - A Agrawal
- Division of Basic and Clinical Immunology, Department of Medicine, University of California, Irvine, Irvine, CA, USA
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18
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Li X, Xu L, Hou X, Geng J, Tian J, Liu X, Bai X. Advanced Oxidation Protein Products Aggravate Tubulointerstitial Fibrosis Through Protein Kinase C-Dependent Mitochondrial Injury in Early Diabetic Nephropathy. Antioxid Redox Signal 2019; 30:1162-1185. [PMID: 29482336 DOI: 10.1089/ars.2017.7208] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
AIMS Diabetic nephropathy (DN) is the most common microvascular complications and the principal cause of mortality and morbidity rates in patients with diabetes. The expression of advanced oxidation protein products (AOPPs) has been found in vacuolated renal tubules in DN and correlated with patients' decreased renal function. The accumulation of AOPPs is regarded as an initiating factor in podocyte injuries via the protein kinase C (PKC) signaling, which plays a critical role in triggering oxidative stress and mitochondrial injuries in diseases including DN. Whether AOPPs could induce mitochondrial injuries and fibrosis in renal tubules remains largely unknown. Herein, we tested the hypothesis that the accumulation of AOPPs in diabetes incurs mitochondrial dysfunction and oxidative stress, causing renal tubulointerstitial fibrosis (TIF) via PKC signaling pathway. RESULTS In vivo, intrarenal AOPPs accumulation correlated with oxidative stress, renal fibrosis, proteinuria, and declined renal function in DN patients and diabetic rats. AOPPs-induced mitochondrial injuries, apoptosis, and TIF were significantly mitigated by PKCη inhibition in diabetic rats. In vitro, high glucose (HG) stimulated AOPP expression and augmented PKC-mediated oxidative stress and fibrosis in HK-2 cells. Furthermore, we provide mechanistic evidence that inhibition of PKCη isoform alleviated mitochondrial injuries and function, attenuated apoptosis, and renal fibrosis in HG-cultured AOPPs-induced HK-2 cells. Innovation and Conclusion: We propose a novel mechanism that AOPPs-induced mitochondrial dysfunction and oxidative stress cause TIF in DN via activation of the PKCη isoform.
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Affiliation(s)
- Xiao Li
- 1 Department of Emergency, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Liting Xu
- 2 Division of Nephrology, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, Guangzhou, Guangdong, People's Republic of China
| | - Xiaoyan Hou
- 3 Department of Nephrology, The First Affiliated Hospital, Inner Mongolia Medical University, Hohhot, Inner Mongolia, People's Republic of China
| | - Jian Geng
- 4 Department of Pathology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Jianwei Tian
- 2 Division of Nephrology, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, Guangzhou, Guangdong, People's Republic of China
| | - Xiaoting Liu
- 5 Department of Pathology, King Medical Diagnostics Center, Guangzhou, Guangdong, People's Republic of China
| | - Xiaoyan Bai
- 2 Division of Nephrology, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, Guangzhou, Guangdong, People's Republic of China
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19
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Grohová A, Dáňová K, Špíšek R, Palová-Jelínková L. Cell Based Therapy for Type 1 Diabetes: Should We Take Hyperglycemia Into Account? Front Immunol 2019; 10:79. [PMID: 30804929 PMCID: PMC6370671 DOI: 10.3389/fimmu.2019.00079] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 01/11/2019] [Indexed: 12/16/2022] Open
Abstract
Diabetes mellitus is characterized by long standing hyperglycemia leading to numerous life-threatening complications. For type 1 diabetes mellitus, resulting from selective destruction of insulin producing cells by exaggerated immune reaction, the only effective therapy remains exogenous insulin administration. Despite accurate compliance to treatment of certain patients, transient episodes of hyperglycemia cannot be completely eliminated by this symptomatic treatment. Novel immunotherapeutic approaches based on tolerogenic dendritic cells, T regulatory cells and mesenchymal stem cells (MSCs) have been tested in clinical trials, endeavoring to directly modulate the autoimmune destruction process in pancreas. However, hyperglycemia itself affects the immune system and the final efficacy of cell-based immunotherapies could be affected by the different glycemic control of enrolled patients. The present review explores the impact of hyperglycemia on immune cells while providing greater insight into the molecular mechanisms of high glucose action and subsequent metabolic reprogramming of different immune cells. Furthermore, over-production of mitochondrial reactive oxygen species, formation of advanced glycation end products as a consequence of hyperglycemia and their downstream signalization in immune cells are also discussed. Since hyperglycemia in patients with type 1 diabetes mellitus might have an impact on immune-interventional treatment, the maintenance of a tight glucose control seems to be beneficial in patients considered for cell-based therapy.
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Affiliation(s)
- Anna Grohová
- SOTIO a.s., Prague, Czechia.,Department of Immunology, Second Faculty of Medicine, University Hospital Motol, Charles University in Prague, Prague, Czechia.,Department of Pediatrics, Charles University in Prague, Second Faculty of Medicine, University Hospital Motol, Prague, Czechia
| | - Klára Dáňová
- SOTIO a.s., Prague, Czechia.,Department of Immunology, Second Faculty of Medicine, University Hospital Motol, Charles University in Prague, Prague, Czechia
| | - Radek Špíšek
- SOTIO a.s., Prague, Czechia.,Department of Immunology, Second Faculty of Medicine, University Hospital Motol, Charles University in Prague, Prague, Czechia
| | - Lenka Palová-Jelínková
- SOTIO a.s., Prague, Czechia.,Department of Immunology, Second Faculty of Medicine, University Hospital Motol, Charles University in Prague, Prague, Czechia
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20
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Yetkin GI, Yucel AA, Tekin İÖ, Yılmaz M, Atalay H, Yetkin E. Dendritic cell activation is blunted in patients with coronary artery disease and diabetes mellitus. J Diabetes Complications 2019; 33:134-139. [PMID: 30522792 DOI: 10.1016/j.jdiacomp.2018.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 10/16/2018] [Accepted: 11/10/2018] [Indexed: 11/28/2022]
Abstract
BACKGROUND It has been shown that functional status of dendritic cells (DCs) in diabetic patients with unstable angina pectoris (UAP) are more mature and activated than diabetic patients without coronary artery disease (CAD) and none diabetic patients with UAP. Accordingly we aimed to assess the activation of DCs in patients with CAD with/and without Diabetes Mellitus (DM) and compare to those in subjects with normal coronary arteries (NCA). MATERIALS AND METHODS Twenty three patients with severe CAD who were scheduled to coronary artery by-pass grafting surgery and 6 patients with angiographycally NCAs were included in the study. Activation of peripheral blood DCs have been analyzed by flow cytometric measures of CD86 activation. RESULTS In patients with CAD and without DM, DC activation significantly increased after stimulation of oxidesized LDL (135 ± 121 vs 248 ± 197 p = 0.024). However this activation didn't significantly increased in patients with CAD and DM (100 ± 20 vs 120 ± 97, p = 0,54). Patients with NCAs and without DM showed marked activation of CD86 after stimulation with ox-LDL. CONCLUSION We have documented that DC activation, upon stimulation of ox-LDL has blunted in patients with CAD compared to patients with NCAs. Moreover this defective activation is more pronounced in those with diabetic patients with CAD.
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Affiliation(s)
| | - Aysegul Atak Yucel
- Gazi University Faculty of Medicine, Department of Immunology, Ankara, Turkey.
| | - İshak Özel Tekin
- Zonguldak Bulent Ecevit University School of Medicine, Department of Immonology, Zonguldak, Turkey
| | - Mustafa Yılmaz
- Cukurova University Faculty of Medicine, Department of Pediatric Allergy and Immunology, Adana, Turkey.
| | - Hakan Atalay
- Middle East Hospital Division of Cardiovascular Surgery, Mersin, Turkey.
| | - Ertan Yetkin
- Yenisehir Hospital Division of Cardiology, Mersin, Turkey.
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21
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Perusko M, van Roest M, Stanic‐Vucinic D, Simons PJ, Pieters RHH, Cirkovic Velickovic T, Smit JJ. Glycation of the Major Milk Allergen β-Lactoglobulin Changes Its Allergenicity by Alterations in Cellular Uptake and Degradation. Mol Nutr Food Res 2018; 62:e1800341. [PMID: 30004175 PMCID: PMC6174979 DOI: 10.1002/mnfr.201800341] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 06/27/2018] [Indexed: 11/17/2022]
Abstract
SCOPE During food processing, the Maillard reaction (МR) may occur, resulting in the formation of glycated proteins. Glycated proteins are of particular importance in food allergies because glycation may influence interactions with the immune system. This study compared native and extensively glycated milk allergen β-lactoglobulin (BLG), in their interactions with cells crucially involved in allergy. METHODS AND RESULTS BLG was glycated in MR and characterized. Native and glycated BLG were tested in experiments of epithelial transport, uptake and degradation by DCs, T-cell cytokine responses, and basophil cell degranulation using ELISA and flow cytometry. Glycation of BLG induced partial unfolding and reduced its intestinal epithelial transfer over a Caco-2 monolayer. Uptake of glycated BLG by bone marrow-derived dendritic cells (BMDC) was increased, although both BLG forms entered BMDC via the same mechanism, receptor-mediated endocytosis. Once inside the BMDC, glycated BLG was degraded faster, which might have led to observed lower cytokine production in BMDC/CD4+ T-cells coculture. Finally, glycated BLG was less efficient in induction of degranulation of BLG-specific IgE sensitized basophil cells. CONCLUSIONS This study suggests that glycation of BLG by MR significantly alters its fate in processes involved in immunogenicity and allergenicity, pointing out the importance of food processing in food allergy.
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Affiliation(s)
- Marija Perusko
- Faculty of Chemistry–Innovation Center d.o.o.11000BelgradeSerbia
| | - Manon van Roest
- Institute for Risk Assessment SciencesImmunotoxicology GroupUtrecht University3584 CMUtrechtThe Netherlands
| | - Dragana Stanic‐Vucinic
- Center of Excellence for Molecular Food Sciences and Department of BiochemistryUniversity of Belgrade–Faculty of Chemistry11000BelgradeSerbia
| | | | - Raymond H. H. Pieters
- Institute for Risk Assessment SciencesImmunotoxicology GroupUtrecht University3584 CMUtrechtThe Netherlands
| | - Tanja Cirkovic Velickovic
- Center of Excellence for Molecular Food Sciences and Department of BiochemistryUniversity of Belgrade–Faculty of Chemistry11000BelgradeSerbia
- Faculty of Bioscience EngineeringGhent University9000GhentBelgium
- Ghent University Global CampusYeonsu‐Gu21985IncheonSouth Korea
| | - Joost J. Smit
- Institute for Risk Assessment SciencesImmunotoxicology GroupUtrecht University3584 CMUtrechtThe Netherlands
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22
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Frydrych LM, Bian G, O'Lone DE, Ward PA, Delano MJ. Obesity and type 2 diabetes mellitus drive immune dysfunction, infection development, and sepsis mortality. J Leukoc Biol 2018; 104:525-534. [PMID: 30066958 DOI: 10.1002/jlb.5vmr0118-021rr] [Citation(s) in RCA: 155] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 06/18/2018] [Accepted: 06/19/2018] [Indexed: 12/14/2022] Open
Abstract
Obesity and type 2 diabetes mellitus (T2D) are global pandemics. Worldwide, the prevalence of obesity has nearly tripled since 1975 and the prevalence of T2D has almost doubled since 1980. Both obesity and T2D are indolent and chronic diseases that develop gradually, with cellular physiologic changes occurring before the clinical signs and symptoms of the diseases become apparent. Individuals with obesity and T2D are physiologically frail and have an increased risk of infections and mortality from sepsis. Improvement in the morbidity and mortality of these at-risk populations would provide a great societal benefit. We believe that the worsened outcomes observed in these patient populations is due to immune system dysfunction that is triggered by the chronic low-grade inflammation present in both diseases. As immune modulatory therapies have been utilized in other chronic inflammatory diseases, there is an emerging role for immune modulatory therapies that target the chronically affected immune pathways in obese and T2D patients. Additionally, bariatric surgery is currently the most successful treatment for obesity and is the only weight loss method that also causes a sustained, substantial improvement of T2D. Consequently, bariatric surgery may also have a role in improving immunity in these patient populations.
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Affiliation(s)
- Lynn M Frydrych
- Department of Surgery, Division of Acute Care Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Guowu Bian
- Department of Surgery, Division of Acute Care Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | - David E O'Lone
- Department of Surgery, Division of Acute Care Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Peter A Ward
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - Matthew J Delano
- Department of Surgery, Division of Acute Care Surgery, University of Michigan, Ann Arbor, Michigan, USA
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23
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Broadgate S, Kiire C, Halford S, Chong V. Diabetic macular oedema: under-represented in the genetic analysis of diabetic retinopathy. Acta Ophthalmol 2018; 96 Suppl A111:1-51. [PMID: 29682912 DOI: 10.1111/aos.13678] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 11/21/2017] [Indexed: 12/15/2022]
Abstract
Diabetic retinopathy, a complication of both type 1 and type 2 diabetes, is a complex disease and is one of the leading causes of blindness in adults worldwide. It can be divided into distinct subclasses, one of which is diabetic macular oedema. Diabetic macular oedema can occur at any time in diabetic retinopathy and is the most common cause of vision loss in patients with type 2 diabetes. The purpose of this review is to summarize the large number of genetic association studies that have been performed in cohorts of patients with type 2 diabetes and published in English-language journals up to February 2017. Many of these studies have produced positive associations with gene polymorphisms and diabetic retinopathy. However, this review highlights that within this large body of work, studies specifically addressing a genetic association with diabetic macular oedema, although present, are vastly under-represented. We also highlight that many of the studies have small patient numbers and that meta-analyses often inappropriately combine patient data sets. We conclude that there will continue to be conflicting results and no meaningful findings will be achieved if the historical approach of combining all diabetic retinopathy disease states within patient cohorts continues in future studies. This review also identifies several genes that would be interesting to analyse in large, well-defined cohorts of patients with diabetic macular oedema in future candidate gene association studies.
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Affiliation(s)
- Suzanne Broadgate
- Nuffield Laboratory of Ophthalmology; Nuffield Department of Clinical Neurosciences; University of Oxford; Oxford UK
| | - Christine Kiire
- Nuffield Laboratory of Ophthalmology; Nuffield Department of Clinical Neurosciences; University of Oxford; Oxford UK
- Oxford Eye Hospital; John Radcliffe Hospital; Oxford University NHS Foundation Trust; Oxford UK
| | - Stephanie Halford
- Nuffield Laboratory of Ophthalmology; Nuffield Department of Clinical Neurosciences; University of Oxford; Oxford UK
| | - Victor Chong
- Nuffield Laboratory of Ophthalmology; Nuffield Department of Clinical Neurosciences; University of Oxford; Oxford UK
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24
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Frydrych LM, Fattahi F, He K, Ward PA, Delano MJ. Diabetes and Sepsis: Risk, Recurrence, and Ruination. Front Endocrinol (Lausanne) 2017; 8:271. [PMID: 29163354 PMCID: PMC5670360 DOI: 10.3389/fendo.2017.00271] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 09/27/2017] [Indexed: 12/16/2022] Open
Abstract
Sepsis develops when an infection surpasses local tissue containment. A series of dysregulated physiological responses are generated, leading to organ dysfunction and a 10% mortality risk. When patients with sepsis demonstrate elevated serum lactates and require vasopressor therapy to maintain adequate blood pressure in the absence of hypovolemia, they are in septic shock with an in-hospital mortality rate >40%. With improvements in intensive care treatment strategies, overall sepsis mortality has diminished to ~20% at 30 days; however, mortality continues to steadily climb after recovery from the acute event. Traditionally, it was thought that the complex interplay between inflammatory and anti-inflammatory responses led to sepsis-induced organ dysfunction and mortality. However, a closer examination of those who die long after sepsis subsides reveals that many initial survivors succumb to recurrent, nosocomial, and secondary infections. The comorbidly challenged, physiologically frail diabetic individuals suffer the highest infection rates. Recent reports suggest that even after clinical "recovery" from sepsis, persistent alterations in innate and adaptive immune responses exists resulting in chronic inflammation, immune suppression, and bacterial persistence. As sepsis-associated immune defects are associated with increased mortality long-term, a potential exists for immune modulatory therapy to improve patient outcomes. We propose that diabetes causes a functional immune deficiency that directly reduces immune cell function. As a result, patients display diminished bactericidal clearance, increased infectious complications, and protracted sepsis mortality. Considering the substantial expansion of the elderly and obese population, global adoption of a Western diet and lifestyle, and multidrug resistant bacterial emergence and persistence, diabetic mortality from sepsis is predicted to rise dramatically over the next two decades. A better understanding of the underlying diabetic-induced immune cell defects that persist following sepsis are crucial to identify potential therapeutic targets to bolster innate and adaptive immune function, prevent infectious complications, and provide more durable diabetic survival.
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Affiliation(s)
- Lynn M. Frydrych
- Department of Surgery, Division of Acute Care Surgery, University of Michigan, Ann Arbor, MI, United States
| | - Fatemeh Fattahi
- Department of Pathology, University of Michigan, Ann Arbor, MI, United States
| | - Katherine He
- Department of Surgery, Division of Acute Care Surgery, University of Michigan, Ann Arbor, MI, United States
| | - Peter A. Ward
- Department of Pathology, University of Michigan, Ann Arbor, MI, United States
| | - Matthew J. Delano
- Department of Surgery, Division of Acute Care Surgery, University of Michigan, Ann Arbor, MI, United States
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25
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Food Processing: The Influence of the Maillard Reaction on Immunogenicity and Allergenicity of Food Proteins. Nutrients 2017; 9:nu9080835. [PMID: 28777346 PMCID: PMC5579628 DOI: 10.3390/nu9080835] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 07/25/2017] [Accepted: 08/01/2017] [Indexed: 01/19/2023] Open
Abstract
The majority of foods that are consumed in our developed society have been processed. Processing promotes a non-enzymatic reaction between proteins and sugars, the Maillard reaction (MR). Maillard reaction products (MRPs) contribute to the taste, smell and color of many food products, and thus influence consumers’ choices. However, in recent years, MRPs have been linked to the increasing prevalence of diet- and inflammation-related non-communicable diseases including food allergy. Although during the last years a better understanding of immunogenicity of MRPs has been achieved, still only little is known about the structural/chemical characteristics predisposing MRPs to interact with antigen presenting cells (APCs). This report provides a comprehensive review of recent studies on the influence of the Maillard reaction on the immunogenicity and allergenicity of food proteins.
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26
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Byun K, Yoo Y, Son M, Lee J, Jeong GB, Park YM, Salekdeh GH, Lee B. Advanced glycation end-products produced systemically and by macrophages: A common contributor to inflammation and degenerative diseases. Pharmacol Ther 2017; 177:44-55. [PMID: 28223234 DOI: 10.1016/j.pharmthera.2017.02.030] [Citation(s) in RCA: 224] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Advanced glycation end products (AGEs) and their receptor have been implicated in the progressions of many intractable diseases, such as diabetes and atherosclerosis, and are also critical for pathologic changes in chronic degenerative diseases, such as Alzheimer's disease, Parkinson's disease, and alcoholic brain damage. Recently activated macrophages were found to be a source of AGEs, and the most abundant form of AGEs, AGE-albumin excreted by macrophages has been implicated in these diseases and to act through common pathways. AGEs inhibition has been shown to prevent the pathogenesis of AGEs-related diseases in human, and therapeutic advances have resulted in several agents that prevent their adverse effects. Recently, anti-inflammatory molecules that inhibit AGEs have been shown to be good candidates for ameliorating diabetic complications as well as degenerative diseases. This review was undertaken to present, discuss, and clarify current understanding regarding AGEs formation in association with macrophages, different diseases, therapeutic and diagnostic strategy and links with RAGE inhibition.
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Affiliation(s)
- Kyunghee Byun
- Center for Genomics and Proteomics, Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon 406-840, Republic of Korea; Department of Anatomy and Cell Biology, Gachon University Graduate School of Medicine, Incheon 406-799, Republic of Korea
| | - YongCheol Yoo
- Center for Cognition and Sociality, Institute for Basic Science (IBS), Daejeon 305-811, Republic of Korea
| | - Myeongjoo Son
- Department of Anatomy and Cell Biology, Gachon University Graduate School of Medicine, Incheon 406-799, Republic of Korea
| | - Jaesuk Lee
- Center for Genomics and Proteomics, Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon 406-840, Republic of Korea
| | - Goo-Bo Jeong
- Department of Anatomy and Cell Biology, Gachon University Graduate School of Medicine, Incheon 406-799, Republic of Korea
| | - Young Mok Park
- Center for Cognition and Sociality, Institute for Basic Science (IBS), Daejeon 305-811, Republic of Korea.
| | - Ghasem Hosseini Salekdeh
- Department of Molecular Systems Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.
| | - Bonghee Lee
- Center for Genomics and Proteomics, Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon 406-840, Republic of Korea; Department of Anatomy and Cell Biology, Gachon University Graduate School of Medicine, Incheon 406-799, Republic of Korea.
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27
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The false alarm hypothesis: Food allergy is associated with high dietary advanced glycation end-products and proglycating dietary sugars that mimic alarmins. J Allergy Clin Immunol 2017; 139:429-437. [DOI: 10.1016/j.jaci.2016.05.040] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 04/24/2016] [Accepted: 05/05/2016] [Indexed: 12/27/2022]
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28
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Dendritic Cells and Their Role in Cardiovascular Diseases: A View on Human Studies. J Immunol Res 2016; 2016:5946807. [PMID: 27088098 PMCID: PMC4818818 DOI: 10.1155/2016/5946807] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 01/22/2016] [Accepted: 02/22/2016] [Indexed: 02/07/2023] Open
Abstract
The antigen-presenting dendritic cells (DCs) are key to the immunological response, with different functions ascribed ranging from cellular immune activation to induction of tolerance. Such immunological responses are involved in the pathophysiological mechanisms of cardiovascular diseases, with DCs shown to play a role in atherosclerosis, hypertension, and heart failure and most notably following heart transplantation. A better understanding of the interplay between the immune system and cardiovascular diseases will therefore be critical for developing novel therapeutic treatments as well as innovative monitoring tools for disease progression. As such, the present review will provide an overview of DCs involvement in the pathophysiology of cardiovascular diseases and how targeting these cells may have beneficial effects for the prognosis of patients.
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29
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Probucol Protects Against Atherosclerosis Through Lipid-lowering and Suppressing Immune Maturation of CD11c+ Dendritic Cells in STZ-induced Diabetic LDLR-/- Mice. J Cardiovasc Pharmacol 2016; 65:620-7. [PMID: 25714599 PMCID: PMC4461394 DOI: 10.1097/fjc.0000000000000234] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Probucol, an agent characterized by lipid-lowering and antioxidant property, retards atherosclerosis effectively. To test the hypothesis that probucol might act its antiatherosclerotic role by suppressing immune maturation of dendritic cells (DCs), 7-week-old LDLR−/− mice were rendered diabetic with streptozotocin (STZ) and then fed either a high-fat diet only or added with 0.5% (wt/wt) probucol for 4 months, and human monocyte-derived dendritic cells were preincubated with or without probucol and stimulated by oxidized low-density lipoprotein. In STZ-induced diabetic LDLR−/− mice, probucol treatment significantly lowered plasma total cholesterol and high-density lipoprotein-cholesterol levels; regressed aortic atherosclerotic lesions; reduced splenic CD40, CD80, CD86, MHC-II expression, and plasma IL-12p70 production; and decreased the expression of CD11c+ DCs within atherosclerotic lesions. In vitro, oxidized low-density lipoprotein promoted human monocyte–derived dendritic cells maturation; stimulated CD40, CD86, CD1a, HLA-DR expression; increased tumor necrosis factor-α production; and decreased IL-4 production. However, these effects were obviously inhibited by probucol pretreatment. In conclusion, our study indicated that probucol effectively retarded atherosclerosis at least partly through lipid-lowering and inhibiting immune maturation of CD11c+ DCs in STZ-induced diabetic LDLR−/− mice.
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30
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Lubrano V, Balzan S. Roles of LOX-1 in microvascular dysfunction. Microvasc Res 2016; 105:132-40. [PMID: 26907636 DOI: 10.1016/j.mvr.2016.02.006] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 02/17/2016] [Accepted: 02/17/2016] [Indexed: 10/22/2022]
Abstract
Studies from human and animal models with metabolic disease and hypertension highlight atrophic remodeling, reduced lumen size and thinner vascular walls of microvessels with profound density reduction. This impaired vascular response limits the perfusion of peripheral tissues inducing organ damage. These conditions are strongly associated with oxidative stress and in particular with the up-regulation of lectin-like oxidized low density lipoprotein receptor-1 (LOX-1). Several factors such as cytokines, shear stress, and advanced glycation end-products, especially oxLDL, can up-regulate LOX-1. The activation of this receptor induces the production of adhesion molecules, cytokines and the release of reactive oxygen species via NADPH oxidase. LOX-1 is considered a potent mediator of endothelial dysfunction and it is significantly associated with reduced microvascular endothelium NO-dependent vasodilation in hypercholesterolemia and hypertension. Microvascular endothelial cells increased the expression of IL-6 in association with the increased concentration of LDL and its degree of oxidation. Moreover, increased IL-6 levels are associated with up-regulation of LOX-1 in a dose-dependent manner. Another consequence of microvascular inflammation is the generation of small amounts of ROS, similar to those induced by low concentration of oxLDL (<5 μg/mL) which induces capillary tube formation of endothelial cells, through LOX-1 up-regulation. In light of its central role, LOX-1 represents an attractive therapeutic target for the treatment of human atherosclerotic diseases and microvascular disorders.
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Affiliation(s)
- Valter Lubrano
- Fondazione CNR/Regione Toscana G. Monasterio, Pisa, Italy.
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31
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Feng L, Zhu MM, Bu WQ, Wang CF, Zheng ZG, Wang RS, Jia XB, Zhu Q. The C-terminal tails of 4,4'-diphenylmethane-bis(methyl) carbamate are essential for binding to receptor for advanced glycation end products to attenuate advanced glycation end products-induced inflammation and apoptosis responses in human umbilical vein endothelial cells. ACTA ACUST UNITED AC 2016; 68:93-106. [PMID: 26806697 DOI: 10.1111/jphp.12499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 11/01/2015] [Indexed: 01/05/2023]
Abstract
OBJECTIVES A novel compound 4,4'-diphenylmethane-bis(methyl) carbamate (CM1) was shown to possess preventive activity on AGEs-induced human umbilical vein endothelial cells (HUVECs) damage via binding to RAGE. However, the underlying structural basis of CM1 on binding to RAGE was not fully understood. METHODS In the present study, CM1 analogues were designed and synthesized to compare the activity differences on inhibiting AGEs-induced inflammatory response including TGF-β1, RAGE protein expression in HUVECs, and macrophages migration and adhesion to HUVECs. In addition, the cell viability and anti-apoptosis activities of CM1 analogues were also examined. KEY FINDINGS These results indicated that CM1 had higher activities on preventing AGEs-induced HUVECs damage (inflammation, cell viability and apoptosis) than other analogues. The bioaffinity assay was conducted by CMC and demonstrated that the IC50 and dissociation equilibrium constants (Kd) of CM1 were lower whereas the Bmax was higher than other analogues. The incubation of RAGE protein with CM1 analogues by equilibrium dialysis method showed CM1 had a stronger binding rate than other CM1 analogues. CONCLUSION Our findings suggested that the C-terminal tails (methoxycarbonyl groups) of CM1 were the active groups for binding to RAGE and then led to the attenuation on RAGE-mediated endothelial dysfunction.
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Affiliation(s)
- Liang Feng
- Key Laboratory of Delivery Systems of Chinese Materia Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, Nanjing, China.,State Key Laboratory of Quality Research in Chinese Medicine, Biotechnology Labortory of Chinese Medicine, Macau University of Science and Technology, Taipa, Macau, China
| | - Mao-mao Zhu
- Key Laboratory of Delivery Systems of Chinese Materia Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, Nanjing, China
| | - Wei-quan Bu
- Key Laboratory of Delivery Systems of Chinese Materia Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, Nanjing, China.,Jiangsu Provincial Combine Traditional Chinese and Western Medicine Hospital, Jiangsu, Nanjing, China
| | - Chun-fei Wang
- Key Laboratory of Delivery Systems of Chinese Materia Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, Nanjing, China
| | - Zhao-guang Zheng
- State Key Laboratory of Quality Research in Chinese Medicine, Biotechnology Labortory of Chinese Medicine, Macau University of Science and Technology, Taipa, Macau, China
| | - Ru-shang Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Biotechnology Labortory of Chinese Medicine, Macau University of Science and Technology, Taipa, Macau, China.,Institute of Conson Co. for Chinese Medicine in Kidiney Diseases and Consun Pharmaceutical Group, Guangzhou, China
| | - Xiao-bin Jia
- Key Laboratory of Delivery Systems of Chinese Materia Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, Nanjing, China
| | - Quan Zhu
- State Key Laboratory of Quality Research in Chinese Medicine, Biotechnology Labortory of Chinese Medicine, Macau University of Science and Technology, Taipa, Macau, China.,Institute of Conson Co. for Chinese Medicine in Kidiney Diseases and Consun Pharmaceutical Group, Guangzhou, China
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32
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Meng HZ, Zhang WL, Liu F, Yang MW. Advanced Glycation End Products Affect Osteoblast Proliferation and Function by Modulating Autophagy Via the Receptor of Advanced Glycation End Products/Raf Protein/Mitogen-activated Protein Kinase/Extracellular Signal-regulated Kinase Kinase/Extracellular Signal-regulated Kinase (RAGE/Raf/MEK/ERK) Pathway. J Biol Chem 2015; 290:28189-28199. [PMID: 26472922 DOI: 10.1074/jbc.m115.669499] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Indexed: 01/08/2023] Open
Abstract
The interaction between advanced glycation end products (AGEs) and receptor of AGEs (RAGE) is associated with the development and progression of diabetes-associated osteoporosis, but the mechanisms involved are still poorly understood. In this study, we found that AGE-modified bovine serum albumin (AGE-BSA) induced a biphasic effect on the viability of hFOB1.19 cells; cell proliferation was stimulated after exposure to low dose AGE-BSA, but cell apoptosis was stimulated after exposure to high dose AGE-BSA. The low dose AGE-BSA facilitates proliferation of hFOB1.19 cells by concomitantly promoting autophagy, RAGE production, and the Raf/MEK/ERK signaling pathway activation. Furthermore, we investigated the effects of AGE-BSA on the function of hFOB1.19 cells. Interestingly, the results suggest that the short term effects of low dose AGE-BSA increase osteogenic function and decrease osteoclastogenic function, which are likely mediated by autophagy and the RAGE/Raf/MEK/ERK signal pathway. In contrast, with increased treatment time, the opposite effects were observed. Collectively, AGE-BSA had a biphasic effect on the viability of hFOB1.19 cells in vitro, which was determined by the concentration of AGE-BSA and treatment time. A low concentration of AGE-BSA activated the Raf/MEK/ERK signal pathway through the interaction with RAGE, induced autophagy, and regulated the proliferation and function of hFOB1.19 cells.
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Affiliation(s)
- Hong-Zheng Meng
- Department of Orthopaedics, First Affiliated Hospital, China Medical University, Shenyang 110001, China
| | - Wei-Lin Zhang
- Department of Orthopaedics, First Affiliated Hospital, China Medical University, Shenyang 110001, China
| | - Fei Liu
- Department of Orthopaedics, First Affiliated Hospital, China Medical University, Shenyang 110001, China
| | - Mao-Wei Yang
- Department of Orthopaedics, First Affiliated Hospital, China Medical University, Shenyang 110001, China.
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Lu H, Huang D, Yao K, Li C, Chang S, Dai Y, Sun A, Zou Y, Qian J, Ge J. Insulin enhances dendritic cell maturation and scavenger receptor-mediated uptake of oxidised low-density lipoprotein. J Diabetes Complications 2015; 29:465-71. [PMID: 25813675 DOI: 10.1016/j.jdiacomp.2015.03.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 02/07/2015] [Accepted: 03/09/2015] [Indexed: 12/12/2022]
Abstract
OBJECTIVES The prevalence of atherosclerotic cardiovascular disease is increased in patients with type 2 diabetes. The role of hyperinsulinaemia as an independent participant in the atherogenic process is controversial. Therefore, we examined whether insulin regulates the expression of scavenger receptors responsible for oxidised low-density lipoprotein (oxLDL) uptake in dendritic cells (DCs). In addition, we investigated the impact of insulin on DC maturation with regard to changes in phenotype and cytokine secretion. METHODS Immature DCs were cultured with different concentrations of insulin (1nmol/L, 10nmol/L, 50nmol/L, and 100nmol/L) in the absence or presence of LY294002 or PD98059 for 24h. The expression of the scavenger receptors SR-A and CD36 was determined by real-time PCR and Western blot analysis. Furthermore, DCs were incubated with 1,1'-dioctadecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate (DiI)-labelled oxLDL. The DiI-oxLDL-incorporated fraction was investigated by flow cytometry. Finally, flow cytometry was used to investigate immunophenotypic protein expression (CD83, CD86, and CD11a). Supernatant cytokine measurements were used as indicators of immune function. RESULTS The incubation of DCs with insulin enhanced SR-A and CD36 gene and protein expression in a dose-dependent manner. This effect was partially abolished by PD98059, which is an extracellular signal-regulated kinase (ERK) inhibitor. However, LY294002 did not inhibit the effect of insulin on scavenger receptor expression. A high concentration of insulin increased the oxLDL-uptake capacity of DCs. Inhibition of the scavenger receptors SR-A and CD36 significantly reduced oxLDL uptake. Furthermore, a high concentration of insulin induced DC maturation. The pro-atherosclerotic chemokines IL-6 and IL-12 were induced by a high concentration of insulin, whereas the release of anti-atherosclerotic IL-10 was reduced. CONCLUSION This study suggests that hyperinsulinaemia can promote DC activation and up-regulate the expression of the scavenger receptors SR-A and CD36, which can increase the oxLDL-uptake capacity of DCs. The results of the present study indicate that one of the mechanisms by which insulin promotes atherogenesis is mediated by its effects on DCs.
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Affiliation(s)
- Hao Lu
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai, China, 200032.
| | - Dong Huang
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai, China, 200032.
| | - Kang Yao
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai, China, 200032.
| | - Chenguang Li
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai, China, 200032.
| | - Shufu Chang
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai, China, 200032.
| | - Yuxiang Dai
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai, China, 200032.
| | - Aijun Sun
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai, China, 200032.
| | - Yunzeng Zou
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai, China, 200032.
| | - Juying Qian
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai, China, 200032.
| | - Junbo Ge
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai, China, 200032.
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Ma K, Xu Y, Wang C, Li N, Li K, Zhang Y, Li X, Yang Q, Zhang H, Zhu X, Bai H, Ben J, Ding Q, Li K, Jiang Q, Xu Y, Chen Q. A cross talk between class A scavenger receptor and receptor for advanced glycation end-products contributes to diabetic retinopathy. Am J Physiol Endocrinol Metab 2014; 307:E1153-65. [PMID: 25352436 DOI: 10.1152/ajpendo.00378.2014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In response to hyperglycemia in patients with diabetes, many signaling pathways contribute to the pathogenesis of diabetic complications, including diabetic retinopathy (DR). Excessive production of inflammatory mediators plays an important role in this process. Amadori-glycated albumin, one of the major forms of advanced glycated end-products, has been implicated in DR by inducing inflammatory responses in microglia/macrophages. Our goal was to delineate the potential cross talk between class A scavenger receptor (SR-A) and the receptor for advanced glycated end-product (RAGE) in the context of DR. We show here that SR-A ablation caused an exacerbated form of DR in streptozotocin-injected C57BL/6J mice as evidenced by fundus imaging and electroretinography. Immunohistochemical staining and RT-PCR assay indicated that there was augmented activation of proinflammatory macrophages with upregulated synthesis of proinflammatory mediators in the retina in Sr-a(-/-) mice. Overexpression of SR-A suppressed RAGE-induced mitogen-activated protein kinase (MAPK) signaling, whereas RAGE activation in macrophages favored a proinflammatory (M1) phenotype in the absence of SR-A. Mechanistic analysis on bone marrow-derived macrophages and HEK293 cell line revealed that SR-A interacted with and inhibited the phosphorylation of mitogen-activated protein kinase kinase 7, the major kinase in the RAGE-MAPK-NF-κB signaling, thereby leading to diminished secretion of proinflammatory cytokines. Our findings suggest that the antagonism between SR-A and RAGE contributes to the pathogenesis of DR by nurturing a disease-prone macrophage phenotype. Therefore, specific agonist that boosts SR-A signaling could potentially provide benefits in the prevention and/or intervention of DR.
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Affiliation(s)
- Ke Ma
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Center, Nanjing Medical University, Nanjing, China; and
| | - Yiming Xu
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Center, Nanjing Medical University, Nanjing, China; and
| | - Chenchen Wang
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Center, Nanjing Medical University, Nanjing, China; and
| | - Nan Li
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Center, Nanjing Medical University, Nanjing, China; and
| | - Kexue Li
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Center, Nanjing Medical University, Nanjing, China; and
| | - Yan Zhang
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Center, Nanjing Medical University, Nanjing, China; and
| | - Xiaoyu Li
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Center, Nanjing Medical University, Nanjing, China; and
| | - Qing Yang
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Center, Nanjing Medical University, Nanjing, China; and
| | - Hanwen Zhang
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Center, Nanjing Medical University, Nanjing, China; and
| | - Xudong Zhu
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Center, Nanjing Medical University, Nanjing, China; and
| | - Hui Bai
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Center, Nanjing Medical University, Nanjing, China; and
| | - Jingjing Ben
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Center, Nanjing Medical University, Nanjing, China; and
| | - Qingqing Ding
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Center, Nanjing Medical University, Nanjing, China; and
| | - Keran Li
- The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China
| | - Qin Jiang
- The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China
| | - Yong Xu
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Center, Nanjing Medical University, Nanjing, China; and
| | - Qi Chen
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Center, Nanjing Medical University, Nanjing, China; and
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Xu L, Wang S, Li B, Sun A, Zou Y, Ge J. A protective role of ciglitazone in ox-LDL-induced rat microvascular endothelial cells via modulating PPARγ-dependent AMPK/eNOS pathway. J Cell Mol Med 2014; 19:92-102. [PMID: 25388834 PMCID: PMC4288353 DOI: 10.1111/jcmm.12463] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 09/19/2014] [Indexed: 01/10/2023] Open
Abstract
Thiazolidinediones, the antidiabetic agents such as ciglitazone, has been proved to be effective in limiting atherosclerotic events. However, the underlying mechanism remains elucidative. Ox-LDL receptor-1 (LOX-1) plays a central role in ox-LDL-mediated atherosclerosis via endothelial nitric oxide synthase (eNOS) uncoupling and nitric oxide reduction. Therefore, we tested the hypothesis that ciglitazone, the PPARγ agonist, protected endothelial cells against ox-LDL through regulating eNOS activity and LOX-1 signalling. In the present study, rat microvascular endothelial cells (RMVECs) were stimulated by ox-LDL. The impact of ciglitazone on cell apoptosis and angiogenesis, eNOS expression and phosphorylation, nitric oxide synthesis and related AMPK, Akt and VEGF signalling pathway were observed. Our data showed that both eNOS and Akt phosphorylation, VEGF expression and nitric oxide production were significantly decreased, RMVECs ageing and apoptosis increased after ox-LDL induction for 24 hrs, all of which were effectively reversed by ciglitazone pre-treatment. Meanwhile, phosphorylation of AMP-activated protein kinase (AMPK) was suppressed by ox-LDL, which was also prevented by ciglitazone. Of interest, AMPK inhibition abolished ciglitazone-mediated eNOS function, nitric oxide synthesis and angiogenesis, and increased RMVECs ageing and apoptosis. Further experiments showed that inhibition of PPARγ significantly suppressed AMPK phosphorylation, eNOS expression and nitric oxide production. Ciglitazone-mediated angiogenesis and reduced cell ageing and apoptosis were reversed. Furthermore, LOX-1 protein expression in RMVECs was suppressed by ciglitazone, but re-enhanced by blocking PPARγ or AMPK. Ox-LDL-induced suppression of eNOS and nitric oxide synthesis were largely prevented by silencing LOX-1. Collectively, these data demonstrate that ciglitazone-mediated PPARγ activation suppresses LOX-1 and moderates AMPK/eNOS pathway, which contributes to endothelial cell survival and function preservation.
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Affiliation(s)
- Lei Xu
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China; Institutes of Biomedical Science, Fudan University, Shanghai, China
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Sternberg Z, Sternberg D, Drake A, Chichelli T, Yu J, Hojnacki D. Disease modifying drugs modulate endogenous secretory receptor for advanced glycation end-products, a new biomarker of clinical relapse in multiple sclerosis. J Neuroimmunol 2014; 274:197-201. [DOI: 10.1016/j.jneuroim.2014.07.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 07/04/2014] [Accepted: 07/08/2014] [Indexed: 12/20/2022]
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Sang HQ, Gu JF, Yuan JR, Zhang MH, Jia XB, Feng L. The protective effect of Smilax glabra extract on advanced glycation end products-induced endothelial dysfunction in HUVECs via RAGE-ERK1/2-NF-κB pathway. JOURNAL OF ETHNOPHARMACOLOGY 2014; 155:785-795. [PMID: 24953033 DOI: 10.1016/j.jep.2014.06.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Revised: 06/07/2014] [Accepted: 06/10/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Smilax glabra Roxb. (SGR) is a traditional Chinese herb that has been used in folk for the treatment of diabetic vascular complications. Advanced glycation end products (AGEs)-induced endothelial dysfunction has been thought to be a major cause of diabetic vascular complications. The present study was conducted to investigate the protective effect of SGR extract on AGEs-induced endothelial dysfunction and its underlying mechanisms. MATERIALS AND METHODS Human umbilical vein endothelial cells (HUVECs) were exposed to 200 μg/ml AGEs to induce endothelial dysfunction. Acridine orange/ethidium bromide (AO/EB) fluorescence assay and Annexin-V/PI double-staining were performed to determine endothelium apoptosis. Dihydroethidium (DHE) fluorescence probe, SOD and MDA kits were used to evaluate oxidative stress. The effect of SGR extract on AGEs-induced TGF-beta1 expression was determined by immunocytochemistry and western blotting. Attenuations of SGR extract on receptor for AGEs (RAGE) expression, extracellular regulated protein kinases (ERK1/2) activation and NF-κB phosphorylation were determined by immunofluorescence assay and western blotting. The blockade assays for RAGE and ERK1/2 were carried out using a specific RAGE-antibody (RAGE-Ab) or a selective ERK1/2 inhibitor PD98059 in immunofluorescence assay. RESULTS The pretreatment of SGR extract (0.125, 0.25 and 0.5 mg crude drug/ml) significantly attenuated AGEs-induced endothelium apoptosis, and down-regulated TGF-beta1 protein expression in HUVECs. It was also well shown that SGR extract could down-regulate dose-dependently ROS over-generation, MDA content, TGF-beta1 expression, ERK1/2 and NF-κB activation whereas increase significantly SOD activity. Furthermore, the AGEs-induced ERK1/2 activation could be attenuated by the blockade of RAGE-Ab (5 μg/ml) while the NF-κB activation was ameliorated by ERK1/2 inhibitor PD98059 (10 μM). CONCLUSION These results indicated that SGR extract could attenuate AGEs-induced endothelial dysfunction via RAGE-ERK1/2-NF-κB pathways. Our findings suggest that SGR extract may be beneficial for attenuating endothelial dysfunction in diabetic vascular complications.
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Affiliation(s)
- Hai-qiang Sang
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Henan, Zhengzhou 450052, PR China.
| | - Jun-fei Gu
- Key Laboratory of Delivery Systems of Chinese Meteria Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, Nanjing 210028, PR China; College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Jia-rui Yuan
- Key Laboratory of Delivery Systems of Chinese Meteria Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, Nanjing 210028, PR China; College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Ming-hua Zhang
- Key Laboratory of Delivery Systems of Chinese Meteria Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, Nanjing 210028, PR China
| | - Xiao-bin Jia
- Key Laboratory of Delivery Systems of Chinese Meteria Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, Nanjing 210028, PR China
| | - Liang Feng
- Key Laboratory of Delivery Systems of Chinese Meteria Medica, Jiangsu Provincial Academy of Chinese Medicine, Jiangsu, Nanjing 210028, PR China.
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Toda M, Heilmann M, Ilchmann A, Vieths S. The Maillard reaction and food allergies: is there a link? Clin Chem Lab Med 2014; 52:61-7. [PMID: 23492561 DOI: 10.1515/cclm-2012-0830] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Accepted: 02/07/2013] [Indexed: 11/15/2022]
Abstract
Food allergies are abnormal responses to a food triggered by the immune system. The majority of allergenic foods are often subjected to thermal processing before consumption. The Maillard reaction is a non-enzymatic reaction between reducing sugars and compounds with free amino groups such as amino acids and proteins, and takes place during thermal processing and storage of foods. Among many other effects the reaction leads to modification of proteins with various types of glycation structures such as Nε-(carboxymethyl-)lysine (CML), pentosidine, pyrraline and methylglyoxal-H1, which are collectively called advanced glycation end-products (AGEs). Notably, evidence has accumulated that some glycation structures of AGEs function as immune epitopes. Here we discuss the possible involvement of food allergen AGEs in the pathogenesis of food allergies.
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Atorvastatin represses the angiotensin 2-induced oxidative stress and inflammatory response in dendritic cells via the PI3K/Akt/Nrf 2 pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2014; 2014:148798. [PMID: 25110549 PMCID: PMC4106155 DOI: 10.1155/2014/148798] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 06/11/2014] [Accepted: 06/11/2014] [Indexed: 12/14/2022]
Abstract
Dendritic cells (DCs), which are highly proficient antigen-presenting cells, play a complex role in both the initiation and progression of atherosclerosis. We tested the hypothesis that the anti-inflammatory and antioxidant effects of atorvastatin may be partly mediated by the phosphatidylinositol 3-kinase/protein kinase B/transcription factor nuclear factor-erythroid 2-related factor 2 (PI3K/Akt/Nrf 2) pathway via the attenuation of DC maturation, thus reducing the inflammatory and oxidative stress responses. This study showed that angiotensin 2 (Ang 2) induced the maturation of DCs, stimulated CD83, CD40, CD80, and CD86 expression, and increased the secretion of IL-12p70, IL-6, and TNF-α. These effects were suppressed by atorvastatin. Atorvastatin also lowered the levels of reactive oxygen species (ROS) and malondialdehyde (MDA), counteracting their initial increases in response to Ang 2 stimulation. Atorvastatin activated Nrf 2 via the PI3K/Akt pathway and thereby promoted Nrf 2 translocation from the cytoplasm to the nucleus in bone marrow-derived dendritic cells (BMDCs), a process that was reversed by the PI3K inhibitor LY294002. Therefore, the regulation of Nrf 2 expression by the PI3K/Akt pathway plays an important role in the regulation of the statin-mediated antioxidant and anti-inflammatory responses in DCs.
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Advanced Glycation End Products Promote Heart Failure Through Inducing the Immune Maturation of Dendritic Cells. Appl Biochem Biotechnol 2014; 172:4062-77. [DOI: 10.1007/s12010-014-0804-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Accepted: 12/29/2013] [Indexed: 10/25/2022]
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Heilmann M, Wellner A, Gadermaier G, Ilchmann A, Briza P, Krause M, Nagai R, Burgdorf S, Scheurer S, Vieths S, Henle T, Toda M. Ovalbumin modified with pyrraline, a Maillard reaction product, shows enhanced T-cell immunogenicity. J Biol Chem 2014; 289:7919-28. [PMID: 24505139 DOI: 10.1074/jbc.m113.523621] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The Maillard reaction (also referred to as "glycation") takes place between reducing sugars and compounds with free amino groups during thermal processing of foods. In the final stage of the complex reaction cascade, the so-called advanced glycation end products (AGEs) are formed, including proteins with various glycation structures. It has been suggested that some AGEs could have immunostimulatory effects. Here, we aimed to identify specific glycation structure(s) that could influence the T-cell immunogenicity and potential allergenicity of food allergens, using ovalbumin (OVA, an egg white allergen) as a model allergen. OVA was specifically modified with representative glycation structures: N(ε)-carboxymethyl lysine (CM-OVA), N(ε)-carboxyethyl lysine (CE-OVA), pyrraline (Pyr-OVA), or methylglyoxal-derived arginine derivatives (MGO-OVA). As well as AGE-OVA, a crude glycation product in thermal incubation of OVA with glucose, only Pyr-OVA, and not other modified OVAs, was efficiently taken up by bone marrow-derived murine dendritic cells (BMDCs). The uptake of Pyr-OVA was reduced in scavenger receptor class A (SR-A)-deficient BMDCs, but not in cells treated with inhibitors of scavenger receptor class B, galectin-3, or blocking antibodies against CD36, suggesting that pyrraline binds to SR-A. Compared with other modified OVAs, Pyr-OVA induced higher activation of OVA-specific CD4(+) T-cells in co-culture with BMDCs. Furthermore, compared with native OVA, AGE-OVA and Pyr-OVA induced higher IgE production in mice. Pyrraline could induce better allergen uptake by DCs via association with SR-A and subsequently enhance CD4(+) T-cell activation and IgE production. Our findings help us to understand how Maillard reaction enhances the potential allergenicity of food allergens.
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Affiliation(s)
- Monika Heilmann
- From the Junior Research Group 1, "Experimental Allergy Models" and
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Affiliation(s)
- Anette Christ
- Department of Pathology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Center, Maastricht, the Netherlands (A.C., L.T., B.L., E.A.L.B.); Department of Cell Biology, Institute for Biomedical Engineering, Aachen University Hospital, Aachen, Germany (A.C.); and Department of Pathology, Amsterdam Medical Center, Amsterdam, The Netherlands (M.J.A.P.D.)
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Cellular signalling of the receptor for advanced glycation end products (RAGE). Cell Signal 2013; 25:2185-97. [DOI: 10.1016/j.cellsig.2013.06.013] [Citation(s) in RCA: 347] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 06/15/2013] [Accepted: 06/25/2013] [Indexed: 01/03/2023]
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Feng L, Zhu M, Zhang M, Gu J, Jia X, Tan X, Gao C, Zhu Q. The protection of 4,4′-diphenylmethane-bis(methyl) carbamate from Cortex Mori on advanced glycation end product-induced endothelial dysfunction: Via inhibiting AGE formation or blocking AGEs–RAGE axis? Fitoterapia 2013; 89:239-49. [DOI: 10.1016/j.fitote.2013.06.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2013] [Revised: 05/25/2013] [Accepted: 06/01/2013] [Indexed: 10/26/2022]
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Resveratrol prevents dendritic cell maturation in response to advanced glycation end products. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:574029. [PMID: 23936610 PMCID: PMC3725714 DOI: 10.1155/2013/574029] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 06/06/2013] [Accepted: 06/07/2013] [Indexed: 12/22/2022]
Abstract
Advanced glycation end products (AGEs), generated through nonenzymatic glycosylation of proteins, lipids, and nucleic acids, accumulate in the body by age thus being considered as biomarkers of senescence. Senescence is characterized by a breakdown of immunological self-tolerance, resulting in increased reactivity to self-antigens. Previous findings suggest that AGE and its receptor RAGE may be involved in the pathogenesis of autoimmune reactions through dendritic cell (DC) activation. The aim of this study was to investigate whether resveratrol, a polyphenolic antioxidant compound with tolerogenic effects on DCs, was able to counteract the mechanisms triggered by AGE/RAGE interaction on DCs. By immunochemical and cytofluorimetric assays, we demonstrated that in vitro pretreatment of human monocyte-derived DCs with resveratrol prevents DC activation in response to glucose-treated albumin (AGE-albumin). We found that resveratrol exerts an inhibitory effect on DC surface maturation marker and RAGE up-regulation in response to AGE-albumin. It also inhibited proinflammatory cytokine expression, allostimulatory ability upregulation, mitogen-activated protein (MAP) kinases, and NF-κB activation in AGE-albumin-stimulated DCs. We suggest that resveratrol, by dismantling AGE/RAGE signaling on DCs may prevent or reduce increased reactivity to self-molecules in aging.
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Calycosin entered HUVECs and ameliorated AGEs-promoted cell apoptosis via the Bcl-2 pathway. J Nat Med 2013; 68:163-72. [DOI: 10.1007/s11418-013-0787-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Accepted: 06/07/2013] [Indexed: 10/26/2022]
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Shi B, Du X, Wang Q, Chen Y, Zhang X. Increased PD-1 on CD4(+)CD28(-) T cell and soluble PD-1 ligand-1 in patients with T2DM: association with atherosclerotic macrovascular diseases. Metabolism 2013; 62:778-85. [PMID: 23398844 DOI: 10.1016/j.metabol.2012.12.005] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2012] [Revised: 12/03/2012] [Accepted: 12/09/2012] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To study the role of the programmed death-1 (PD-1)/programmed death-1 ligand 1 (PD-L1) coinhibitory pathway in regulating CD4(+)CD28(-) T cells, and to explore the association of soluble PD-L1 (sPD-L1) in the development of T2DM with atherosclerotic macrovascular diseases. METHODS The percentage of CD4(+)CD28(-) T lymphocyte subsets from peripheral blood mononuclear cells (PBMCs) and the expression of PD-1/PD-L1 on lymphocytes were analyzed by immunostaining and flow cytometry, respectively. The serum levels of sPD-L1 and IFN-γ were determined by ELISA system. T cell proliferation was determined by cocultivation and WST-8 incorporation. RESULTS In 125 T2DM patients and 48 healthy donors, CD4(+)CD28(-) T cells from patients with T2DM expressed higher PD-1 than that of the cells from healthy individuals, and the proliferation response of CD4(+)CD28(-) T cells could be enhanced by advanced glycation end products (AGEs). The levels of sPD-L1 in patients were also much higher than those of healthy donors, and the increase was displayed in an exacerbation-dependent manner in the T2DM with atherosclerotic macrovascular patients especially with acute coronary syndrome (ACS). The production of sPD-L1 was significantly positively correlated with the level of IFN-γ and could enhance T cell proliferation. CONCLUSION Both the upregulation of PD-1 and the increase of sPD-L1 were closely associated with the severity of diabetic atherosclerotic macrovascular diseases. sPD-L1 may contribute to the continuous T cell activation and development of diabetic macrovascular diseases.
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Affiliation(s)
- Bimin Shi
- Department of Endocrinology, First Affiliated Hospital of Soochow University, China
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Lu H, Yao K, Huang D, Sun A, Zou Y, Qian J, Ge J. High glucose induces upregulation of scavenger receptors and promotes maturation of dendritic cells. Cardiovasc Diabetol 2013; 12:80. [PMID: 23718574 PMCID: PMC3685538 DOI: 10.1186/1475-2840-12-80] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Accepted: 05/27/2013] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Both hyperglycaemia and dendritic cells (DCs) play causative roles in atherosclerosis. However, whether they interact in atherosclerosis remains uncertain. Therefore, we examined whether high glucose could regulate the expression of scavenger receptors responsible for oxidised low-density lipoprotein (oxLDL) uptake in DCs, a critical step in atherogenesis. In addition, we investigated the impact of glucose on DC maturation regarding changes in phenotype and cytokine secretion. METHODS Immature DCs were cultured with different concentrations of glucose (5.5 mmol/L, 15 mmol/L, 30 mmol/L) in the absence or presence of N-acetylcysteine (NAC), SB203580 or Bay11-7082 for 24 hours. We used 30 mmol/L mannitol as a high-osmolarity control treatment. The expression of the scavenger receptors SR-A, CD36 and LOX-1 was determined by real-time PCR and western blot analysis. Furthermore, DCs were incubated with DiI-labelled oxLDL. The DiI-oxLDL-incorporated fraction was investigated by flow cytometry analysis. The intracellular production of ROS in DCs was measured by dichlorodihydrofluorescein (DCF) fluorescence using confocal microscopy. Finally, flow cytometry analysis was used to investigate immunophenotypic protein expression (CD83 and CD86). Supernatant cytokine measurements were used for immune function assays. RESULTS The incubation of DCs with glucose enhanced, in a dose-dependent manner, the gene and protein expression of SR-A, CD36 and LOX-1. This effect was partially abolished by NAC, SB203580 and Bay11-7082. Incubation of DCs with mannitol (30 mmol/L) did not enhance these scavenger receptors' expression. High glucose upregulated the production of ROS and expression of p38 MAPK in DCs. NAC partially reversed p38 MAPK upregulation. High glucose increased the oxLDL-uptake capacity of DCs. Blockage of the scavenger receptors SR-A and CD36 reduced oxLDL uptake, but blockage of LOX-1 did not. Furthermore, high-glucose (15 mmol/L or 30 mmol/L) treatment increased CD86 and CD83 in DCs. High glucose also increased IL-6 and IL-12 secretion and decreased IL-10 secretion. CONCLUSION High glucose can increase the expression of the scavenger receptors SR-A, CD36 and LOX-1, which can increase the oxLDL-uptake capacity of DCs. High glucose induces a proinflammatory cytokine profile in human DCs, leading to DC maturation. These results support the hypothesis that atherosclerosis is aggravated by hyperglycaemia-induced DC activation and oxLDL uptake.
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Affiliation(s)
- Hao Lu
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai China 200032
| | - Kang Yao
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai China 200032
| | - Dong Huang
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai China 200032
| | - Aijun Sun
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai China 200032
| | - Yunzeng Zou
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai China 200032
| | - Juying Qian
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai China 200032
| | - Junbo Ge
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai China 200032
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Cao W, Xu J, Zhou ZM, Wang GB, Hou FF, Nie J. Advanced oxidation protein products activate intrarenal renin-angiotensin system via a CD36-mediated, redox-dependent pathway. Antioxid Redox Signal 2013; 18:19-35. [PMID: 22662869 PMCID: PMC3503474 DOI: 10.1089/ars.2012.4603] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
AIMS Activation of intrarenal renin-angiotensin system (RAS) has a detrimental effect on the progression of chronic kidney diseases (CKDs), although the regulation of intrarenal RAS remains unclear. The aim of the present study was to evaluate the role of advanced oxidation protein products (AOPPs) in intrarenal RAS activation. RESULTS AOPPs upregulated the expression of almost all components of RAS and increased activity of angiotensin-converting enzyme in cultured proximal tubular epithelial cells. The triggering effect of AOPP-albumin was 100-times stronger than that of unmodified albumin. The effect of AOPP-albumin was mainly mediated by a CD36-dependent, redox-sensitive signaling involving activation of protein kinase Cα, NADPH oxidase, and nuclear factor-κB/activation protein-1. Chronic AOPP-albumin loading in unilateral nephrectomy rats resulted in deposition of AOPPs in renal tubular cells accompanied with local RAS activation and functional perturbations such as increase in urinary albumin excretion. Accumulation of AOPPs was also detected in human renal tubular cells and correlated with expression of angiotensin II in renal biopsies from 19 patients with IgA nephropathy. INNOVATION AND CONCLUSION This study demonstrated for the first time that AOPPs modified albumin functions as a strong trigger of intrarenal RAS via a CD36-mediated, redox-dependent pathway. Given the fact that accumulation of AOPPs is prevalent in diabetes and CKD, targeting AOPPs could be a strategy for the therapeutic intervention of CKD. Antioxid. Redox Signal. 18, 19-35.
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Affiliation(s)
- Wei Cao
- Division of Nephrology, Nanfang Hospital, Southern Medical University, Key Lab for Organ Failure Research, Ministry of Education, Research Institute of Nephrology, Guangdong Province, Guangzhou, People's Republic of China
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Simões C, Silva AC, Domingues P, Laranjeira P, Paiva A, Domingues MRM. Phosphatidylethanolamines Glycation, Oxidation, and Glycoxidation: Effects on Monocyte and Dendritic Cell Stimulation. Cell Biochem Biophys 2012; 66:477-87. [DOI: 10.1007/s12013-012-9495-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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