1
|
Thouvenot K, Turpin T, Taïlé J, Clément K, Meilhac O, Gonthier MP. Links between Insulin Resistance and Periodontal Bacteria: Insights on Molecular Players and Therapeutic Potential of Polyphenols. Biomolecules 2022; 12:biom12030378. [PMID: 35327570 PMCID: PMC8945445 DOI: 10.3390/biom12030378] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/22/2022] [Accepted: 02/24/2022] [Indexed: 02/07/2023] Open
Abstract
Type 2 diabetes is a metabolic disease mainly associated with insulin resistance during obesity and constitutes a major public health problem worldwide. A strong link has been established between type 2 diabetes and periodontitis, an infectious dental disease characterized by chronic inflammation and destruction of the tooth-supporting tissue or periodontium. However, the molecular mechanisms linking periodontal bacteria and insulin resistance remain poorly elucidated. This study aims to summarize the mechanisms possibly involved based on in vivo and in vitro studies and targets them for innovative therapies. Indeed, during periodontitis, inflammatory lesions of the periodontal tissue may allow periodontal bacteria to disseminate into the bloodstream and reach tissues, including adipose tissue and skeletal muscles that store glucose in response to insulin. Locally, periodontal bacteria and their components, such as lipopolysaccharides and gingipains, may deregulate inflammatory pathways, altering the production of pro-inflammatory cytokines/chemokines. Moreover, periodontal bacteria may promote ROS overproduction via downregulation of the enzymatic antioxidant defense system, leading to oxidative stress. Crosstalk between players of inflammation and oxidative stress contributes to disruption of the insulin signaling pathway and promotes insulin resistance. In parallel, periodontal bacteria alter glucose and lipid metabolism in the liver and deregulate insulin production by pancreatic β-cells, contributing to hyperglycemia. Interestingly, therapeutic management of periodontitis reduces systemic inflammation markers and ameliorates insulin sensitivity in type 2 diabetic patients. Of note, plant polyphenols exert anti-inflammatory and antioxidant activities as well as insulin-sensitizing and anti-bacterial actions. Thus, polyphenol-based therapies are of high interest for helping to counteract the deleterious effects of periodontal bacteria and improve insulin resistance.
Collapse
Affiliation(s)
- Katy Thouvenot
- Université de La Réunion, Inserm, UMR 1188 Diabète Athérothrombose Thérapies Réunion Océan Indien (DéTROI), 97490 Saint-Denis de La Réunion, France; (K.T.); (T.T.); (J.T.); (O.M.)
| | - Teva Turpin
- Université de La Réunion, Inserm, UMR 1188 Diabète Athérothrombose Thérapies Réunion Océan Indien (DéTROI), 97490 Saint-Denis de La Réunion, France; (K.T.); (T.T.); (J.T.); (O.M.)
| | - Janice Taïlé
- Université de La Réunion, Inserm, UMR 1188 Diabète Athérothrombose Thérapies Réunion Océan Indien (DéTROI), 97490 Saint-Denis de La Réunion, France; (K.T.); (T.T.); (J.T.); (O.M.)
| | - Karine Clément
- Nutrition and Obesity, Systemic Approaches (NutriOmics), INSERM, Sorbonne Université, 75013 Paris, France
| | - Olivier Meilhac
- Université de La Réunion, Inserm, UMR 1188 Diabète Athérothrombose Thérapies Réunion Océan Indien (DéTROI), 97490 Saint-Denis de La Réunion, France; (K.T.); (T.T.); (J.T.); (O.M.)
| | - Marie-Paule Gonthier
- Université de La Réunion, Inserm, UMR 1188 Diabète Athérothrombose Thérapies Réunion Océan Indien (DéTROI), 97490 Saint-Denis de La Réunion, France; (K.T.); (T.T.); (J.T.); (O.M.)
- Correspondence: ; Tel.: +33-262-693-92-08-55
| |
Collapse
|
2
|
Wang EM, Hu TH, Huang CC, Chang YC, Yang SM, Huang ST, Wu JC, Ma YL, Chan HH, Liu LF, Lu WB, Kung ML, Wen ZH, Wang JC, Ko CY, Tsai WL, Chu TH, Tai MH. Hepatoma-derived growth factor participates in concanavalin A-induced hepatitis. FASEB J 2020; 34:16163-16178. [PMID: 33063394 DOI: 10.1096/fj.202000511rr] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 09/13/2020] [Accepted: 09/28/2020] [Indexed: 12/12/2022]
Abstract
Hepatitis is an important health problem worldwide. Novel molecular targets are in demand for detection and management of hepatitis. Hepatoma-derived growth factor (HDGF) has been delineated to participate in hepatic fibrosis and liver carcinogenesis. However, the relationship between hepatitis and HDGF remains unclear. This study aimed to elucidate the role of HDGF during hepatitis using concanavalin A (ConA)-induced hepatitis model. In cultured hepatocytes, ConA treatment-elicited HDGF upregulation at transcriptional level and promoted HDGF secretion while reducing intracellular HDGF protein level and cellular viability. Similarly, mice receiving ConA administration exhibited reduced hepatic HDGF expression and elevated circulating HDGF level, which was positively correlated with serum aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels. By using HDGF knockout (KO) mice, it was found the ConA-evoked cell death was prominently alleviated in KO compared with control. Besides, it was delineated HDGF ablation conferred protection by suppressing the ConA-induced neutrophils recruitment in livers. Above all, the ConA-mediated activation of tumor necrosis factor-α (TNF-α)/interleukin-1β (IL-1β)/interleukin-6 (IL-6)/cyclooxygenase-2 (COX-2) inflammatory signaling was significantly abrogated in KO mice. Treatment with recombinant HDGF (rHDGF) dose-dependently stimulated the expression of TNF-α/IL-1β/IL-6/COX-2 in hepatocytes, further supporting the pro-inflammatory function of HDGF. Finally, application of HDGF antibody not only attenuated the ConA-mediated inflammatory cascade in hepatocytes, but also ameliorated the ConA-induced hepatic necrosis and AST elevation in mice. In summary, HDGF participates in ConA-induced hepatitis via neutrophils recruitment and may constitute a therapeutic target for acute hepatitis.
Collapse
Affiliation(s)
- E-Ming Wang
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan.,Division of Gastroenterology and Hepatology, Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Tsung-Hui Hu
- Division of Hepato-Gastroenterology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chao-Cheng Huang
- Biobank and Tissue Bank, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan.,Department of Pathology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Yi-Chen Chang
- Doctoral Degree Program in Marine Biotechnology, National Sun Yat-sen University and Academia Sinica, Kaohsiung, Taiwan
| | - Shih-Ming Yang
- Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Shih-Tsung Huang
- Doctoral Degree Program in Marine Biotechnology, National Sun Yat-sen University and Academia Sinica, Kaohsiung, Taiwan.,LabTurbo Biotech Corporation, Taipei, Taiwan
| | - Jian-Ching Wu
- Biobank and Tissue Bank, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan.,Department of Pathology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Yi-Ling Ma
- Division of Nephrology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Hoi-Hung Chan
- Division of Gastroenterology, Department of Medicine, Conde S. Januário Hospital, Macau, China
| | - Li-Feng Liu
- Department of Biological Science & Technology, I-Shou University, Kaohsiung, Taiwan
| | - Wen-Bin Lu
- Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Mei-Lang Kung
- Department of Medical Education and Research, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Zhi-Hong Wen
- Department of Marine Biotechnology and Resources, Asia-Pacific Ocean Research Center, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Jui-Chu Wang
- Department of Pathology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chou-Yuan Ko
- Department of Gastroenterology, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan
| | - Wei-Lun Tsai
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Tian-Huei Chu
- Biobank and Tissue Bank, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan.,Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Ming-Hong Tai
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan.,Doctoral Degree Program in Marine Biotechnology, National Sun Yat-sen University and Academia Sinica, Kaohsiung, Taiwan.,Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan.,Center for Neuroscience, National Sun Yat-sen University, Kaohsiung, Taiwan.,Regenerative Medicine and Cell Therapy Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan
| |
Collapse
|
3
|
Wang X, Chang CH, Jiang J, Liu X, Li J, Liu Q, Liao YP, Li L, Nel AE, Xia T. Mechanistic Differences in Cell Death Responses to Metal-Based Engineered Nanomaterials in Kupffer Cells and Hepatocytes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2000528. [PMID: 32337854 PMCID: PMC7263057 DOI: 10.1002/smll.202000528] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/19/2020] [Accepted: 03/19/2020] [Indexed: 05/18/2023]
Abstract
The mononuclear phagocyte system in the liver is a frequent target for nanoparticles (NPs). A toxicological profiling of metal-based NPs is performed in Kupffer cell (KC) and hepatocyte cell lines. Sixteen NPs are provided by the Nanomaterial Health Implications Research Consortium of the National Institute of Environmental Health Sciences to study the toxicological effects in KUP5 (KC) and Hepa 1-6 cells. Five NPs (Ag, CuO, ZnO, SiO2 , and V2 O5 ) exhibit cytotoxicity in both cell types, while SiO2 and V2 O5 induce IL-1β production in KC. Ag, CuO, and ZnO induced caspase 3 generated apoptosis in both cell types is accompanied by ion shedding and generation of mitochondrial reactive oxygen species (ROS) in both cell types. However, the cell death response to SiO2 in KC differs by inducing pyroptosis as a result of potassium efflux, caspase 1 activation, NLRP3 inflammasome assembly, IL-1β release, and cleavage of gasdermin-D. This releases pore-performing peptide fragments responsible for pyroptotic cell swelling. Interestingly, although V2 O5 induces IL-1β release and delays caspase 1 activation by vanadium ion interference in membrane Na+ /K+ adenosine triphosphate (ATP)ase activity, the major cell death mechanism in KC (and Hepa 1-6) is caspase 3 mediated apoptosis. These findings improve the understanding of the mechanisms of metal-based engineered nanomaterial (ENM) toxicity in liver cells toward comprehensive safety evaluation.
Collapse
Affiliation(s)
- Xiang Wang
- Division of NanoMedicine, Department of Medicine; University of California, Los Angeles, CA 90095, United States, United States
- California NanoSystems Institute; University of California, Los Angeles, CA 90095, United States, United States
| | - Chong Hyun Chang
- California NanoSystems Institute; University of California, Los Angeles, CA 90095, United States, United States
| | - Jinhong Jiang
- California NanoSystems Institute; University of California, Los Angeles, CA 90095, United States, United States
| | - Xiangsheng Liu
- Division of NanoMedicine, Department of Medicine; University of California, Los Angeles, CA 90095, United States, United States
| | - Jiulong Li
- Division of NanoMedicine, Department of Medicine; University of California, Los Angeles, CA 90095, United States, United States
| | - Qi Liu
- Division of NanoMedicine, Department of Medicine; University of California, Los Angeles, CA 90095, United States, United States
| | - Yu-Pei Liao
- Division of NanoMedicine, Department of Medicine; University of California, Los Angeles, CA 90095, United States, United States
| | - Linjiang Li
- California NanoSystems Institute; University of California, Los Angeles, CA 90095, United States, United States
| | - André E. Nel
- Division of NanoMedicine, Department of Medicine; University of California, Los Angeles, CA 90095, United States, United States
- California NanoSystems Institute; University of California, Los Angeles, CA 90095, United States, United States
| | - Tian Xia
- Division of NanoMedicine, Department of Medicine; University of California, Los Angeles, CA 90095, United States, United States
- California NanoSystems Institute; University of California, Los Angeles, CA 90095, United States, United States
| |
Collapse
|
4
|
Stahl EC, Delgado ER, Alencastro F, LoPresti ST, Wilkinson PD, Roy N, Haschak MJ, Skillen CD, Monga SP, Duncan AW, Brown BN. Inflammation and Ectopic Fat Deposition in the Aging Murine Liver Is Influenced by CCR2. THE AMERICAN JOURNAL OF PATHOLOGY 2019; 190:372-387. [PMID: 31843499 DOI: 10.1016/j.ajpath.2019.10.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 10/02/2019] [Accepted: 10/22/2019] [Indexed: 02/08/2023]
Abstract
Aging is associated with inflammation and metabolic syndrome, which manifests in the liver as nonalcoholic fatty liver disease (NAFLD). NAFLD can range in severity from steatosis to fibrotic steatohepatitis and is a major cause of hepatic morbidity. However, the pathogenesis of NAFLD in naturally aged animals is unclear. Herein, we performed a comprehensive study of lipid content and inflammatory signature of livers in 19-month-old aged female mice. These animals exhibited increased body and liver weight, hepatic triglycerides, and inflammatory gene expression compared with 3-month-old young controls. The aged mice also had a significant increase in F4/80+ hepatic macrophages, which coexpressed CD11b, suggesting a circulating monocyte origin. A global knockout of the receptor for monocyte chemoattractant protein (CCR2) prevented excess steatosis and inflammation in aging livers but did not reduce the number of CD11b+ macrophages, suggesting changes in macrophage accumulation precede or are independent from chemokine (C-C motif) ligand-CCR2 signaling in the development of age-related NAFLD. RNA sequencing further elucidated complex changes in inflammatory and metabolic gene expression in the aging liver. In conclusion, we report a previously unknown accumulation of CD11b+ macrophages in aged livers with robust inflammatory and metabolic transcriptomic changes. A better understanding of the hallmarks of aging in the liver will be crucial in the development of preventive measures and treatments for end-stage liver disease in elderly patients.
Collapse
Affiliation(s)
- Elizabeth C Stahl
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Department of Pathology, University of Pittsburgh School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Evan R Delgado
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Department of Pathology, University of Pittsburgh School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Frances Alencastro
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Department of Pathology, University of Pittsburgh School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Samuel T LoPresti
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Bioengineering Department, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Patrick D Wilkinson
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Department of Pathology, University of Pittsburgh School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Nairita Roy
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Department of Pathology, University of Pittsburgh School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Martin J Haschak
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Bioengineering Department, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Clint D Skillen
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Satdarshan P Monga
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Department of Pathology, University of Pittsburgh School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Andrew W Duncan
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Department of Pathology, University of Pittsburgh School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, Pennsylvania.
| | - Bryan N Brown
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Bioengineering Department, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania; Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, Pennsylvania.
| |
Collapse
|
5
|
Liu XB, Gao ZY, Sun CT, Wen H, Gao B, Li SB, Tong Q. The potential role of P.gingivalis in gastrointestinal cancer: a mini review. Infect Agent Cancer 2019; 14:23. [PMID: 31516546 PMCID: PMC6734237 DOI: 10.1186/s13027-019-0239-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 08/21/2019] [Indexed: 02/20/2023] Open
Abstract
Bacterial infection may be involved in the entire process of tissue carcinogenesis by directly or indirectly affecting the occurrence and development of tumors. Porphyromonas gingivalis (P.gingivalis) is an important pathogen causing periodontitis. Periodontitis may promote the occurrence of various tumors. Gastrointestinal tumors are common malignant tumors with high morbidity, high mortality, and low early diagnosis rate. With the rapid development of molecularbiotechnology, the role of P.gingivalis in digestive tract tumors has been increasingly explored. This article reviews the correlation between P.gingivalis and gastrointestinal cancer and the pathogenesis of the latter. The relationship among P.gingivalis, periodontal disease, and digestive tract tumors must be clarifiedthrough a multi-center, prospective, large-scale study.
Collapse
Affiliation(s)
- Xiao-Bo Liu
- Department of Gastroenterology, Taihe Hospital, Hubei University of Medicine, 32 south renmin road, Shiyan, Hubei 442000 People's Republic of China
| | - Zi-Ye Gao
- Department of Oncology, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000 Hubei China
| | - Chuan-Tao Sun
- Department of Gastroenterology, Taihe Hospital, Hubei University of Medicine, 32 south renmin road, Shiyan, Hubei 442000 People's Republic of China
| | - Hui Wen
- Department of Gastroenterology, Taihe Hospital, Hubei University of Medicine, 32 south renmin road, Shiyan, Hubei 442000 People's Republic of China
| | - Bo Gao
- Department of Laboratory Medicine, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000 Hubei China
| | - Sheng-Bao Li
- Department of Gastroenterology, Taihe Hospital, Hubei University of Medicine, 32 south renmin road, Shiyan, Hubei 442000 People's Republic of China
| | - Qiang Tong
- Department of Gastroenterology, Taihe Hospital, Hubei University of Medicine, 32 south renmin road, Shiyan, Hubei 442000 People's Republic of China
| |
Collapse
|
6
|
Su L, Li N, Tang H, Lou Z, Chong X, Zhang C, Su J, Dong X. Kupffer cell-derived TNF-α promotes hepatocytes to produce CXCL1 and mobilize neutrophils in response to necrotic cells. Cell Death Dis 2018; 9:323. [PMID: 29476069 PMCID: PMC5833701 DOI: 10.1038/s41419-018-0377-4] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 02/04/2018] [Accepted: 02/05/2018] [Indexed: 02/08/2023]
Abstract
The damage-associated molecular pattern molecules (DAMPs) released by necrotic cells can trigger inflammatory response, which will facilitate the clearance of these dead cells. Neutrophil mobilization is a very important step for the dead cell clearance, however the detailed mechanisms for DAMPs induce neutrophil mobilization remains largely elusive. In this study, by using a necrotic cell-induced neutrophil mobilization mice model, we found that both neutrophil number and percentage rapidly (as early as 30 min) increased with necrotic cells but not live cell treatment. CXCL1 was rapidly increased in the serum and was responsible for the neutrophil mobilization when treated with necrotic cells. We further demonstrated that the hepatocytes in the liver were the main source of CXCL1 production in response to necrotic cells challenge. However, the hepatocytes did not express CXCL1 when incubating with necrotic cells alone. When Kupffer cells were ablated, the increased CXCL1 levels as well as neutrophil mobilization were abolished with necrotic cells challenge. Moreover, we clarified Kupffer cells-derived TNF-α activates the NF-κB pathway in hepatocytes and promote hepatocytes to express CXCL1. In summary, we showed that the liver is the main source for necrotic cell-induced CXCL1 production and neutrophil mobilization. Kupffer cells in the liver sense DAMPs and release TNF-α to activate the NF-κB pathway in hepatocytes. The interaction between Kupffer cells and hepatocytes is critical for CXCL1 production.
Collapse
Affiliation(s)
- Li Su
- School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Na Li
- School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Hua Tang
- School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Ziyang Lou
- School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Xiaodan Chong
- Cancer Institute, Institute of Translational Medicine, Second Military Medical University, Shanghai, China
| | - Chenxi Zhang
- School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Jiacan Su
- Department of Orthopedics Trauma, Changhai Hospital of Shanghai, Second Military Medical University, Shanghai, China.
| | - Xin Dong
- School of Pharmacy, Second Military Medical University, Shanghai, China.
| |
Collapse
|
7
|
Abstract
Periodontitis and rheumatoid arthritis (RA) are common chronic inflammatory conditions and share many clinical and pathologic features. There is evidence to suggest that similar profiles of cytokine genotypes and their coding proteins are involved in the pathogenesis of periodontitis and RA. In particular, constitutive overproduction of pro-inflammatory cytokines, including tumor necrosis factor-alpha (TNF-α) and interleukin-6 (IL-6), has been implicated to play a pathologic role in the two inflammatory diseases. Results from studies with animal and human subjects have suggested an improvement of periodontal inflammatory condition after treatment with TNF-α inhibitors. Likewise, IL-6 receptor inhibition therapy has been suggested to have an effect on control of periodontal inflammation in patients with RA. In the present review, we provide an overview of studies showing the pathological role of cytokines in the linkage between periodontitis and RA, and further summarize the current studies assessing the effect of cytokine targeted therapy on periodontal condition.
Collapse
|
8
|
Sun M, Cui W, Woody SK, Staudinger JL. Pregnane X receptor modulates the inflammatory response in primary cultures of hepatocytes. Drug Metab Dispos 2014; 43:335-43. [PMID: 25527709 DOI: 10.1124/dmd.114.062307] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Bacterial sepsis is characterized by a rapid increase in the expression of inflammatory mediators to initiate the acute phase response in liver. Inflammatory mediator release is counterbalanced by the coordinated expression of anti-inflammatory molecules such as interleukin 1 receptor antagonist (IL1-Ra) through time. This study determined whether activation of pregnane X receptor (PXR, NR1I2) alters the lipopolysaccharide (LPS)-inducible gene expression program in primary cultures of hepatocytes (PCHs). Preactivation of PXR for 24 hours in PCHs isolated from wild-type mice suppressed the subsequent LPS-inducible expression of the key inflammatory mediators interleukin 1β (IL-1β), interleukin 6 (IL-6), and tumor necrosis factor α (TNFα) but not in PCHs isolated from Pxr-null (PXR-knockout [KO]) mice. Basal expression of key inflammatory cytokines was elevated in PCHs from PXR-KO mice. Stimulation of PCHs from PXR-KO mice with LPS alone produced enhanced levels of IL-1β when compared with wild-type mice. Experiments performed using PCHs from both humanized-PXR transgenic mice as well as human donors indicate that prolonged activation of PXR produces an increased secretion of IL1-Ra from cells through time. Our data reveal a working model that describes a pivotal role for PXR in both inhibiting as well as in resolving the inflammatory response in hepatocytes. Understanding the molecular details of how PXR is converted from a positive regulator of drug-metabolizing enzymes into a transcriptional suppressor of inflammation in liver will provide new pharmacologic strategies for modulating inflammatory-related diseases in the liver and intestine.
Collapse
Affiliation(s)
- Mengxi Sun
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, Kansas
| | - Wenqi Cui
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, Kansas
| | - Sarah K Woody
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, Kansas
| | - Jeff L Staudinger
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, Kansas
| |
Collapse
|