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Tan Q, Wang B, Ye Z, Mu G, Liu W, Nie X, Yu L, Zhou M, Chen W. Cross-sectional and longitudinal relationships between ozone exposure and glucose homeostasis: Exploring the role of systemic inflammation and oxidative stress in a general Chinese urban population. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 329:121711. [PMID: 37100372 DOI: 10.1016/j.envpol.2023.121711] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 04/05/2023] [Accepted: 04/22/2023] [Indexed: 05/21/2023]
Abstract
The adverse health effects of ozone pollution have been a globally concerned public health issue. Herein we aim to investigate the association between ozone exposure and glucose homeostasis, and to explore the potential role of systemic inflammation and oxidative stress in this association. A total of 6578 observations from the Wuhan-Zhuhai cohort (baseline and two follow-ups) were included in this study. Fasting plasma glucose (FPG) and insulin (FPI), plasma C-reactive protein (CRP, biomarker for systemic inflammation), urinary 8-hydroxy-2'-deoxyguanosine (8-OHdG, biomarker for oxidative DNA damage), and urinary 8-isoprostane (biomarker for lipid peroxidation) were repeatedly measured. After adjusting for potential confounders, ozone exposure was positively associated with FPG, FPI, and homeostasis model assessment of insulin resistance (HOMA-IR), and negatively associated with HOMA of beta cell function (HOMA-β) in cross-sectional analyses. Each 10 ppb increase in cumulative 7-days moving average ozone was associated with a 13.19%, 8.31%, and 12.77% increase in FPG, FPI, and HOMA-IR, respectively, whereas a 6.63% decrease in HOMA-β (all P < 0.05). BMI modified the associations of 7-days ozone exposure with FPI and HOMA-IR, and the effects were stronger in subgroup whose BMI ≥24 kg/m2. Consistently high exposure to annual average ozone was associated with increased FPG and FPI in longitudinal analyses. Furthermore, ozone exposure was positively related to CRP, 8-OHdG, and 8-isoprostane in dose-response manner. Increased CRP, 8-OHdG, and 8-isoprostane could dose-dependently aggravate glucose homeostasis indices elevations related to ozone exposure. Increased CRP and 8-isoprostane mediated 2.11-14.96% of ozone-associated glucose homeostasis indices increment. Our findings suggested that ozone exposure could cause glucose homeostasis damage and obese people were more susceptible. Systemic inflammation and oxidative stress might be potential pathways in glucose homeostasis damage induced by ozone exposure.
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Affiliation(s)
- Qiyou Tan
- Department of Occupational & Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Bin Wang
- Department of Occupational & Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Zi Ye
- Department of Occupational & Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Ge Mu
- Department of Occupational & Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Wei Liu
- Department of Occupational & Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Xiuquan Nie
- Department of Occupational & Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Linling Yu
- Department of Occupational & Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Min Zhou
- Department of Occupational & Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Weihong Chen
- Department of Occupational & Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China.
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Mazenc A, Mervant L, Maslo C, Lencina C, Bézirard V, Levêque M, Ahn I, Alquier-Bacquié V, Naud N, Héliès-Toussaint C, Debrauwer L, Chevolleau S, Guéraud F, Pierre FHF, Théodorou V, Olier M. Maternal heme-enriched diet promotes a gut pro-oxidative status associated with microbiota alteration, gut leakiness and glucose intolerance in mice offspring. Redox Biol 2022; 53:102333. [PMID: 35588638 PMCID: PMC9119830 DOI: 10.1016/j.redox.2022.102333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 05/06/2022] [Accepted: 05/06/2022] [Indexed: 12/17/2022] Open
Abstract
Maternal environment, including nutrition and microbiota, plays a critical role in determining offspring's risk of chronic diseases such as diabetes later in life. Heme iron requirement is amplified during pregnancy and lactation, while excessive dietary heme iron intake, compared to non-heme iron, has shown to trigger acute oxidative stress in the gut resulting from reactive aldehyde formation in conjunction with microbiota reshape. Given the immaturity of the antioxidant defense system in early life, we investigated the extent to which a maternal diet enriched with heme iron may have a lasting impact on gut homeostasis and glucose metabolism in 60-day-old C3H/HeN mice offspring. As hypothesized, the form of iron added to the maternal diet differentially governed the offspring's microbiota establishment despite identical fecal iron status in the offspring. Importantly, despite female offspring was unaffected, oxidative stress markers were however higher in the gut of male offspring from heme enriched-fed mothers, and were accompanied by increases in fecal lipocalin-2, intestinal para-cellular permeability and TNF-α expression. In addition, male mice displayed blood glucose intolerance resulting from impaired insulin secretion following oral glucose challenge. Using an integrated approach including an aldehydomic analysis, this male-specific phenotype was further characterized and revealed close covariations between unidentified putative reactive aldehydes and bacterial communities belonging to Bacteroidales and Lachnospirales orders. Our work highlights how the form of dietary iron in the maternal diet can dictate the oxidative status in gut offspring in a sex-dependent manner, and how a gut microbiota-driven oxidative challenge in early life can be associated with gut barrier defects and glucose metabolism disorders that may be predictive of diabetes development. Maternal heminic vs. non-heminic iron intake differentially and persistently imprints the offspring's fecal microbiota. Males from heme-fed dams exhibit increased gut lumen reactive aldehydes in absence of direct dietary exposure to heme iron. Some of the increased reactive aldehydes closely covariated with Orders belonging to Bacteroidales and Lachnospirales. Maternal exposure to dietary heme iron impairs gut barrier and glucose tolerance in male offspring.
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Affiliation(s)
- Anaïs Mazenc
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Loïc Mervant
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France; Metatoul-AXIOM Plaform, National Infrastructure for Metabolomics and Fluxomics, MetaboHUB, Toulouse, France
| | - Claire Maslo
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Corinne Lencina
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Valérie Bézirard
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Mathilde Levêque
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Ingrid Ahn
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Valérie Alquier-Bacquié
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Nathalie Naud
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Cécile Héliès-Toussaint
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Laurent Debrauwer
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France; Metatoul-AXIOM Plaform, National Infrastructure for Metabolomics and Fluxomics, MetaboHUB, Toulouse, France
| | - Sylvie Chevolleau
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France; Metatoul-AXIOM Plaform, National Infrastructure for Metabolomics and Fluxomics, MetaboHUB, Toulouse, France
| | - Françoise Guéraud
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Fabrice H F Pierre
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Vassilia Théodorou
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Maïwenn Olier
- Toxalim (Research Centre in Food Toxicology), INRAE, Université de Toulouse, ENVT, INP-Purpan, UPS, Toulouse, France.
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Hayes HV, Wolfe V, O’Connor M, Levinsky NC, Piraino G, Zingarelli B. Deficiency of AMPKα1 Exacerbates Intestinal Injury and Remote Acute Lung Injury in Mesenteric Ischemia and Reperfusion in Mice. Int J Mol Sci 2021; 22:9911. [PMID: 34576076 PMCID: PMC8468919 DOI: 10.3390/ijms22189911] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/04/2021] [Accepted: 09/08/2021] [Indexed: 01/13/2023] Open
Abstract
Mesenteric ischemia and reperfusion (I/R) injury can ensue from a variety of vascular diseases and represents a major cause of morbidity and mortality in intensive care units. It causes an inflammatory response associated with local gut dysfunction and remote organ injury. Adenosine monophosphate-activated protein kinase (AMPK) is a crucial regulator of metabolic homeostasis. The catalytic α1 subunit is highly expressed in the intestine and vascular system. In loss-of-function studies, we investigated the biological role of AMPKα1 in affecting the gastrointestinal barrier function. Male knock-out (KO) mice with a systemic deficiency of AMPKα1 and wild-type (WT) mice were subjected to a 30 min occlusion of the superior mesenteric artery. Four hours after reperfusion, AMPKα1 KO mice exhibited exaggerated histological gut injury and impairment of intestinal permeability associated with marked tissue lipid peroxidation and a lower apical expression of the junction proteins occludin and E-cadherin when compared to WT mice. Lung injury with neutrophil sequestration was higher in AMPKα1 KO mice than WT mice and paralleled with higher plasma levels of syndecan-1, a biomarker of endothelial injury. Thus, the data demonstrate that AMPKα1 is an important requisite for epithelial and endothelial integrity and has a protective role in remote organ injury after acute ischemic events.
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Affiliation(s)
- Hannah V. Hayes
- Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA; (H.V.H.); (N.C.L.)
| | - Vivian Wolfe
- Division of Critical Care Medicine, Cincinnati Children’s Hospital Medical Center, and Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA; (V.W.); (M.O.); (G.P.)
| | - Michael O’Connor
- Division of Critical Care Medicine, Cincinnati Children’s Hospital Medical Center, and Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA; (V.W.); (M.O.); (G.P.)
| | - Nick C. Levinsky
- Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA; (H.V.H.); (N.C.L.)
| | - Giovanna Piraino
- Division of Critical Care Medicine, Cincinnati Children’s Hospital Medical Center, and Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA; (V.W.); (M.O.); (G.P.)
| | - Basilia Zingarelli
- Division of Critical Care Medicine, Cincinnati Children’s Hospital Medical Center, and Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA; (V.W.); (M.O.); (G.P.)
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4
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Pomegranate leaf attenuates lipid absorption in the small intestine in hyperlipidemic mice by inhibiting lipase activity. Chin J Nat Med 2017; 15:732-739. [DOI: 10.1016/s1875-5364(17)30104-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Indexed: 12/11/2022]
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5
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Grasset E, Puel A, Charpentier J, Collet X, Christensen JE, Tercé F, Burcelin R. A Specific Gut Microbiota Dysbiosis of Type 2 Diabetic Mice Induces GLP-1 Resistance through an Enteric NO-Dependent and Gut-Brain Axis Mechanism. Cell Metab 2017; 25:1075-1090.e5. [PMID: 28467926 DOI: 10.1016/j.cmet.2017.04.013] [Citation(s) in RCA: 154] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 02/01/2017] [Accepted: 04/13/2017] [Indexed: 12/22/2022]
Abstract
Glucagon-like peptide-1 (GLP-1)-based therapies control glycemia in type 2 diabetic (T2D) patients. However, in some patients the treatment must be discontinued, defining a state of GLP-1 resistance. In animal models we identified a specific set of ileum bacteria impairing the GLP-1-activated gut-brain axis for the control of insulin secretion and gastric emptying. Using prediction algorithms, we identified bacterial pathways related to amino acid metabolism and transport system modules associated to GLP-1 resistance. The conventionalization of germ-free mice demonstrated their role in enteric neuron biology and the gut-brain-periphery axis. Altogether, insulin secretion and gastric emptying require functional GLP-1 receptor and neuronal nitric oxide synthase in the enteric nervous system within a eubiotic gut microbiota environment. Our data open a novel route to improve GLP-1-based therapies.
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Affiliation(s)
- Estelle Grasset
- Institut National de la Santé et de la Recherche Médicale (INSERM), 31024 Toulouse, France; Université Paul Sabatier (UPS), Unité Mixte de Recherche (UMR) 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Team 2: Intestinal Risk Factors, Diabetes, Dyslipidemia, Heart Failure, F-31432 Toulouse, Cedex 4, France
| | - Anthony Puel
- Institut National de la Santé et de la Recherche Médicale (INSERM), 31024 Toulouse, France; Université Paul Sabatier (UPS), Unité Mixte de Recherche (UMR) 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Team 2: Intestinal Risk Factors, Diabetes, Dyslipidemia, Heart Failure, F-31432 Toulouse, Cedex 4, France
| | - Julie Charpentier
- Institut National de la Santé et de la Recherche Médicale (INSERM), 31024 Toulouse, France; Université Paul Sabatier (UPS), Unité Mixte de Recherche (UMR) 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Team 2: Intestinal Risk Factors, Diabetes, Dyslipidemia, Heart Failure, F-31432 Toulouse, Cedex 4, France
| | - Xavier Collet
- Institut National de la Santé et de la Recherche Médicale (INSERM), 31024 Toulouse, France; Université Paul Sabatier (UPS), Unité Mixte de Recherche (UMR) 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Team 2: Intestinal Risk Factors, Diabetes, Dyslipidemia, Heart Failure, F-31432 Toulouse, Cedex 4, France
| | - Jeffrey E Christensen
- Institut National de la Santé et de la Recherche Médicale (INSERM), 31024 Toulouse, France; Université Paul Sabatier (UPS), Unité Mixte de Recherche (UMR) 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Team 2: Intestinal Risk Factors, Diabetes, Dyslipidemia, Heart Failure, F-31432 Toulouse, Cedex 4, France
| | - François Tercé
- Institut National de la Santé et de la Recherche Médicale (INSERM), 31024 Toulouse, France; Université Paul Sabatier (UPS), Unité Mixte de Recherche (UMR) 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Team 2: Intestinal Risk Factors, Diabetes, Dyslipidemia, Heart Failure, F-31432 Toulouse, Cedex 4, France
| | - Rémy Burcelin
- Institut National de la Santé et de la Recherche Médicale (INSERM), 31024 Toulouse, France; Université Paul Sabatier (UPS), Unité Mixte de Recherche (UMR) 1048, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Team 2: Intestinal Risk Factors, Diabetes, Dyslipidemia, Heart Failure, F-31432 Toulouse, Cedex 4, France.
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6
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Blasco-Baque V, Garidou L, Pomié C, Escoula Q, Loubieres P, Le Gall-David S, Lemaitre M, Nicolas S, Klopp P, Waget A, Azalbert V, Colom A, Bonnaure-Mallet M, Kemoun P, Serino M, Burcelin R. Periodontitis induced by Porphyromonas gingivalis drives periodontal microbiota dysbiosis and insulin resistance via an impaired adaptive immune response. Gut 2017; 66:872-885. [PMID: 26838600 PMCID: PMC5531227 DOI: 10.1136/gutjnl-2015-309897] [Citation(s) in RCA: 188] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 12/18/2015] [Indexed: 01/11/2023]
Abstract
OBJECTIVE To identify a causal mechanism responsible for the enhancement of insulin resistance and hyperglycaemia following periodontitis in mice fed a fat-enriched diet. DESIGN We set-up a unique animal model of periodontitis in C57Bl/6 female mice by infecting the periodontal tissue with specific and alive pathogens like Porphyromonas gingivalis (Pg), Fusobacterium nucleatum and Prevotella intermedia. The mice were then fed with a diabetogenic/non-obesogenic fat-enriched diet for up to 3 months. Alveolar bone loss, periodontal microbiota dysbiosis and features of glucose metabolism were quantified. Eventually, adoptive transfer of cervical (regional) and systemic immune cells was performed to demonstrate the causal role of the cervical immune system. RESULTS Periodontitis induced a periodontal microbiota dysbiosis without mainly affecting gut microbiota. The disease concomitantly impacted on the regional and systemic immune response impairing glucose metabolism. The transfer of cervical lymph-node cells from infected mice to naive recipients guarded against periodontitis-aggravated metabolic disease. A treatment with inactivated Pg prior to the periodontal infection induced specific antibodies against Pg and protected the mouse from periodontitis-induced dysmetabolism. Finally, a 1-month subcutaneous chronic infusion of low rates of lipopolysaccharides from Pg mimicked the impact of periodontitis on immune and metabolic parameters. CONCLUSIONS We identified that insulin resistance in the high-fat fed mouse is enhanced by pathogen-induced periodontitis. This is caused by an adaptive immune response specifically directed against pathogens and associated with a periodontal dysbiosis.
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Affiliation(s)
- Vincent Blasco-Baque
- INSERM U1048, Toulouse, France,Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France,Université Paul Sabatier (UPS), Toulouse, France,Faculté de Chirurgie-Dentaire de Toulouse, Technical platform of Research in Odontology, Toulouse Cedex 09, France
| | - Lucile Garidou
- INSERM U1048, Toulouse, France,Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France,Université Paul Sabatier (UPS), Toulouse, France
| | - Céline Pomié
- INSERM U1048, Toulouse, France,Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France,Université Paul Sabatier (UPS), Toulouse, France
| | - Quentin Escoula
- INSERM U1048, Toulouse, France,Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France,Université Paul Sabatier (UPS), Toulouse, France
| | - Pascale Loubieres
- INSERM U1048, Toulouse, France,Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France,Université Paul Sabatier (UPS), Toulouse, France,Faculté de Chirurgie-Dentaire de Toulouse, Technical platform of Research in Odontology, Toulouse Cedex 09, France
| | | | - Mathieu Lemaitre
- Faculté de Chirurgie-Dentaire de Toulouse, Technical platform of Research in Odontology, Toulouse Cedex 09, France
| | - Simon Nicolas
- INSERM U1048, Toulouse, France,Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France,Université Paul Sabatier (UPS), Toulouse, France
| | - Pascale Klopp
- INSERM U1048, Toulouse, France,Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France,Université Paul Sabatier (UPS), Toulouse, France
| | - Aurélie Waget
- INSERM U1048, Toulouse, France,Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France,Université Paul Sabatier (UPS), Toulouse, France
| | - Vincent Azalbert
- INSERM U1048, Toulouse, France,Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France,Université Paul Sabatier (UPS), Toulouse, France
| | - André Colom
- INSERM U1048, Toulouse, France,Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France,Université Paul Sabatier (UPS), Toulouse, France
| | | | - Philippe Kemoun
- Faculté de Chirurgie-Dentaire de Toulouse, Technical platform of Research in Odontology, Toulouse Cedex 09, France
| | - Matteo Serino
- INSERM U1048, Toulouse, France,Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France,Université Paul Sabatier (UPS), Toulouse, France
| | - Rémy Burcelin
- INSERM U1048, Toulouse, France,Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France,Université Paul Sabatier (UPS), Toulouse, France
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7
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Wang X, Lei XG, Wang J. Malondialdehyde regulates glucose-stimulated insulin secretion in murine islets via TCF7L2-dependent Wnt signaling pathway. Mol Cell Endocrinol 2014; 382:8-16. [PMID: 24035868 DOI: 10.1016/j.mce.2013.09.003] [Citation(s) in RCA: 209] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 08/30/2013] [Accepted: 09/03/2013] [Indexed: 11/29/2022]
Abstract
Evidence showed strong relations between malondialdehyde (MDA) levels and different pathological stages of diabetes. Here, an explicit system with freshly isolated islets and precisely controlled MDA gradient was employed to investigate the physiological effect of MDA on GSIS. Promoter analysis, pathway mapping, Q-PCR profiling, and siRNA verification were performed to clarify the intracellular signaling pathways. MDA at a moderately high level (5 and 10μM) promoted GSIS and accompanied with ATP/ADP ratio, cytosolic Ca(2+) level, and key regulators (GK, GLUT2, PDX1, and UCP2) changes in islets. Both upstream (PI3K and p-AKT) and downstream (TCF7L2 and TCF7) factors of Wnt pathway showed greatest changes. Knockdown of TCF7L2 blocked the MDA-induced GSIS elevation. These results indicated that MDA acted as a signaling messenger and regulated islet GSIS mainly through Wnt pathway. Therefore, the elevated MDA level and up-regulated Wnt signaling pathway could be an etiological factor in the development of hyperinsulinemia and type 2 diabetes.
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Affiliation(s)
- Xinhui Wang
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou, Guangdong 510006, China; Animal Science Department, Cornell University, Ithaca, NY 14853, USA
| | - Xin Gen Lei
- Animal Science Department, Cornell University, Ithaca, NY 14853, USA.
| | - Jufang Wang
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou, Guangdong 510006, China.
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8
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Blasco-Baque V, Serino M, Vergnes JN, Riant E, Loubieres P, Arnal JF, Gourdy P, Sixou M, Burcelin R, Kemoun P. High-fat diet induces periodontitis in mice through lipopolysaccharides (LPS) receptor signaling: protective action of estrogens. PLoS One 2012; 7:e48220. [PMID: 23133617 PMCID: PMC3487901 DOI: 10.1371/journal.pone.0048220] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Accepted: 09/21/2012] [Indexed: 01/12/2023] Open
Abstract
Background A fat-enriched diet favors the development of gram negative bacteria in the intestine which is linked to the occurrence of type 2 diabetes (T2D). Interestingly, some pathogenic gram negative bacteria are commonly associated with the development of periodontitis which, like T2D, is characterized by a chronic low-grade inflammation. Moreover, estrogens have been shown to regulate glucose homeostasis via an LPS receptor dependent immune-modulation. In this study, we evaluated whether diet-induced metabolic disease would favor the development of periodontitis in mice. In addition, the regulatory role of estrogens in this process was assessed. Methods Four-week-old C57BL6/J WT and CD14 (part of the TLR-4 machinery for LPS-recognition) knock-out female mice were ovariectomised and subcutaneously implanted with pellets releasing either placebo or 17β-estradiol (E2). Mice were then fed with either a normal chow or a high-fat diet for four weeks. The development of diabetes was monitored by an intraperitoneal glucose-tolerance test and plasma insulin concentration while periodontitis was assessed by identification of pathogens, quantification of periodontal soft tissue inflammation and alveolar bone loss. Results The fat-enriched diet increased the prevalence of periodontal pathogenic microbiota like Fusobacterium nucleatum and Prevotella intermedia, gingival inflammation and alveolar bone loss. E2 treatment prevented this effect and CD14 knock-out mice resisted high-fat diet-induced periodontal defects. Conclusions/Significance Our data show that mice fed with a diabetogenic diet developed defects and microflora of tooth supporting-tissues typically associated with periodontitis. Moreover, our results suggest a causal link between the activation of the LPS pathway on innate immunity by periodontal microbiota and HFD-induced periodontitis, a pathophysiological mechanism that could be targeted by estrogens.
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Affiliation(s)
- Vincent Blasco-Baque
- Institut National de la Santé et de la Recherche Médicale (INSERM), Toulouse, France
- Université Paul Sabatier, Unité Mixte de Recherche (UMR) 1048, Institut de Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
- L.U. 51, Parodontites et Maladies Générales, Université Paul Sabatier, Faculté de Chirurgie Dentaire, 3, Chemin des Maraîchers, Toulouse, France
| | - Matteo Serino
- Institut National de la Santé et de la Recherche Médicale (INSERM), Toulouse, France
- Université Paul Sabatier, Unité Mixte de Recherche (UMR) 1048, Institut de Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
| | - Jean-Noël Vergnes
- L.U. 51, Parodontites et Maladies Générales, Université Paul Sabatier, Faculté de Chirurgie Dentaire, 3, Chemin des Maraîchers, Toulouse, France
| | - Elodie Riant
- Institut National de la Santé et de la Recherche Médicale (INSERM), Toulouse, France
- Université Paul Sabatier, Unité Mixte de Recherche (UMR) 1048, Institut de Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
| | - Pascale Loubieres
- Institut National de la Santé et de la Recherche Médicale (INSERM), Toulouse, France
- Université Paul Sabatier, Unité Mixte de Recherche (UMR) 1048, Institut de Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
- L.U. 51, Parodontites et Maladies Générales, Université Paul Sabatier, Faculté de Chirurgie Dentaire, 3, Chemin des Maraîchers, Toulouse, France
| | - Jean-François Arnal
- Institut National de la Santé et de la Recherche Médicale (INSERM), Toulouse, France
- Université Paul Sabatier, Unité Mixte de Recherche (UMR) 1048, Institut de Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
| | - Pierre Gourdy
- Institut National de la Santé et de la Recherche Médicale (INSERM), Toulouse, France
- Université Paul Sabatier, Unité Mixte de Recherche (UMR) 1048, Institut de Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
| | - Michel Sixou
- L.U. 51, Parodontites et Maladies Générales, Université Paul Sabatier, Faculté de Chirurgie Dentaire, 3, Chemin des Maraîchers, Toulouse, France
| | - Rémy Burcelin
- Institut National de la Santé et de la Recherche Médicale (INSERM), Toulouse, France
- Université Paul Sabatier, Unité Mixte de Recherche (UMR) 1048, Institut de Maladies Métaboliques et Cardiovasculaires (I2MC), Toulouse, France
- * E-mail: (RB); (PK)
| | - Philippe Kemoun
- L.U. 51, Parodontites et Maladies Générales, Université Paul Sabatier, Faculté de Chirurgie Dentaire, 3, Chemin des Maraîchers, Toulouse, France
- * E-mail: (RB); (PK)
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Stubblefield JJ, Terrien J, Green CB. Nocturnin: at the crossroads of clocks and metabolism. Trends Endocrinol Metab 2012; 23:326-33. [PMID: 22608110 PMCID: PMC3389576 DOI: 10.1016/j.tem.2012.03.007] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 03/28/2012] [Accepted: 03/30/2012] [Indexed: 02/06/2023]
Abstract
Many aspects of metabolism exhibit daily rhythmicity under the control of endogenous circadian clocks, and disruptions in circadian timing result in dysfunctions associated with the metabolic syndrome. Nocturnin (Noc) is a robustly rhythmic gene that encodes a deadenylase thought to be involved in the removal of polyA tails from mRNAs. Mice lacking the Noc gene display resistance to diet-induced obesity and hepatic steatosis, due in part to reduced lipid trafficking in the small intestine. In addition, Noc appears to play important roles in other tissues and has been implicated in lipid metabolism, adipogenesis, glucose homeostasis, inflammation and osteogenesis. Therefore, Noc is a potential key post-transcriptional mediator in the circadian control of many metabolic processes.
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Affiliation(s)
- Jeremy J Stubblefield
- Department of Neuroscience, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, NB4.204G, Dallas, TX 75390-9111, USA
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