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Shirbhate U, Bajaj P, Pandher J, Durge K. Fibronectin and Its Applications in Dentistry and Periodontics: A Cell Behaviour Conditioner. Cureus 2022; 14:e30702. [DOI: 10.7759/cureus.30702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 10/26/2022] [Indexed: 11/05/2022] Open
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Plemmenos G, Piperi C. Pathogenic Molecular Mechanisms in Periodontitis and Peri-Implantitis: Role of Advanced Glycation End Products. Life (Basel) 2022; 12:life12020218. [PMID: 35207505 PMCID: PMC8874682 DOI: 10.3390/life12020218] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/19/2022] [Accepted: 01/28/2022] [Indexed: 12/17/2022] Open
Abstract
Advanced Glycation End Products (AGEs), the products of the non-enzymatic oxidation of proteins, nucleic acids, and lipids, are accumulated in periodontal tissues under hyperglycemic conditions such as Diabetes Mellitus (DM) and are responsible for sustained periodontal destruction. AGEs mediate their intracellular effects either directly or indirectly through receptor binding (via RAGE) in all types of periodontal ligament cells (osteocytes, gingival fibroblasts, stem cells, epithelial cells), indicating an important target for intervention. In combination with lipopolysaccharides (LPS) from Porphyromonas gingivalis (Pg), the negative impact of AGEs on periodontal tissue is further enhanced and accentuated. In addition, AGE accumulation is evident in peri-implantitis, yet through different underlying molecular mechanisms. Novel therapeutic approaches targeting the effects of AGEs in periodontal ligament cells show beneficial effects in pre-clinical studies. Herein, we provide evidence on the detrimental role of AGE accumulation in oral cavity tissues and their associated signaling pathways in periodontitis and peri-implantitis to further highlight the significance of oral or topical use of AGE blockers or inhibitors along with dental biofilms’ removal and DM regulation in patients’ management.
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Affiliation(s)
- Grigorios Plemmenos
- School of Dentistry, National and Kapodistrian University of Athens, Goudi, 11527 Athens, Greece; or
| | - Christina Piperi
- School of Dentistry, National and Kapodistrian University of Athens, Goudi, 11527 Athens, Greece; or
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, Goudi, 11527 Athens, Greece
- Correspondence: ; Tel.: +30-2107462610
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Kim YG, Kim WT, Jung BH, Yoo KY, Um HS, Chang BS, Lee JK, Choi WY. Effects of ibuprofen-loaded TiO₂ nanotube dental implants in alloxan-induced diabetic rabbits. J Periodontal Implant Sci 2021; 51:352-363. [PMID: 34713996 PMCID: PMC8558002 DOI: 10.5051/jpis.2007520376] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 02/22/2021] [Accepted: 03/22/2021] [Indexed: 11/25/2022] Open
Abstract
Purpose Some systemic conditions, especially diabetes mellitus (DM), adversely affect dental implant success. This study aimed to investigate the effects of ibuprofen-loaded TiO2 nanotube (ILTN) dental implants in alloxan-induced diabetic rabbits. Methods Twenty-six New Zealand white rabbits were treated with alloxan monohydrate to induce DM. At 2 weeks following DM induction, 3 types of implants (sandblasted, large-grit, and acid-etched [SLA], ILTN, and machined) were placed into the proximal tibia in the 10 rabbits that survived following DM induction. Each type of implant was fitted randomly in 1 of the holes (round-robin method). The animals were administered alizarin (at 3 weeks) and calcein (at 6 weeks) as fluorescent bone markers, and were sacrificed at 8 weeks for radiographic and histomorphometric analyses. Results TiO2 nanotube arrays of ~70 nm in diameter and ~17 μm in thickness were obtained, and ibuprofen was loaded into the TiO2 nanotube arrays. A total of 26 rabbits were treated with alloxan monohydrate and only 10 rabbits survived. The 10 surviving rabbits showed a blood glucose level of 300 mg/dL or higher, and the implants were placed in these diabetic rabbits. The implant stability quotient (ISQ) and bone-to-implant contact (BIC) values were significantly higher in the ILTN group (ISQ: 61.8, BIC: 41.3%) and SLA group (ISQ: 62.6, BIC: 46.3%) than in the machined group (ISQ: 53.4, BIC: 20.2%), but the difference in the BIC percentage between the SLA and ILTN groups was not statistically significant (P=0.628). However, the bone area percentage was significantly higher in the ILTN group (78.0%) than in the SLA group (52.1%; P=0.000). Conclusions The ILTN dental implants showed better stability (ISQ) and BIC than the machined implants; however, these values were similar to the commercially used SLA implants in the 2-week diabetic rabbit model.
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Affiliation(s)
- Young-Gyo Kim
- Department of Periodontology, Gangneung-Wonju National University College of Dentistry, Gangneung, Korea
| | - Wan-Tae Kim
- Department of Advanced Materials Engineering, Gangneung-Wonju National University, Gangneung, Korea
| | - Bo Hyun Jung
- Department of Anatomy, Gangneung-Wonju National University College of Dentistry, Gangneung, Korea
| | - Ki-Yeon Yoo
- Department of Anatomy, Gangneung-Wonju National University College of Dentistry, Gangneung, Korea.,Research Institute for Dental Engineering, Gangneung-Wonju National University, Gangneung, Korea
| | - Heung-Sik Um
- Department of Periodontology, Gangneung-Wonju National University College of Dentistry, Gangneung, Korea
| | - Beom-Seok Chang
- Department of Periodontology, Gangneung-Wonju National University College of Dentistry, Gangneung, Korea
| | - Jae-Kwan Lee
- Department of Periodontology, Gangneung-Wonju National University College of Dentistry, Gangneung, Korea.,Research Institute for Dental Engineering, Gangneung-Wonju National University, Gangneung, Korea.
| | - Won-Youl Choi
- Department of Advanced Materials Engineering, Gangneung-Wonju National University, Gangneung, Korea.,Research Institute for Dental Engineering, Gangneung-Wonju National University, Gangneung, Korea.
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The Effect of Controlled Diabetes and Hyperglycemia on Implant Placement with Simultaneous Horizontal Guided Bone Regeneration: A Clinical Retrospective Analysis. BIOMED RESEARCH INTERNATIONAL 2021; 2021:9931505. [PMID: 34222488 PMCID: PMC8219425 DOI: 10.1155/2021/9931505] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 05/06/2021] [Accepted: 06/04/2021] [Indexed: 01/21/2023]
Abstract
Diabetes represents a challenge in implant therapy because hyperglycemia may negatively affect bone regeneration, directly compromising clinical outcomes and increasing clinical failures. The aim of this retrospective study is to analyse the prognostic significance of HbA1c levels in patients undergoing implant placement associated with horizontal guided bone regeneration. Thirty-four patients were divided into 3 groups according to their HbA1c levels: nondiabetic normoglycemic patients (HbA1c < 5.7%), nondiabetic hyperglycemic patients (HbA1c < 6.5%), and controlled diabetic patients (HbA1c < 7%). Primary outcomes were dimensional changes in height (VDH) and width (DW) of the peri-implant defect. Secondary outcomes were evaluations of periodontal parameters of adjacent tooth sites, wound healing, marginal bone loss (MBL), and survival and success rates. At T1 (6 months), mean VDH values in groups 1, 2, and 3 were, respectively, 0.07, 0.5, and 0.25 mm. Mean DW values in those same groups were, respectively, 0.07, 0.38, and 0.33 mm. HbA1c levels were not statistically related to VDH and DW values at T1. No statistically significant differences were observed in MBL between groups (p = 0.230). Implant survival and success rates were, respectively, 98% and 96%. Simultaneous guided bone regeneration is a feasible procedure for the treatment of horizontal bone deficiencies in controlled diabetic patients.
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Parmaksiz M, Elçin AE, Elçin YM. Decellularized Cell Culture ECMs Act as Cell Differentiation Inducers. Stem Cell Rev Rep 2021; 16:569-584. [PMID: 32170583 DOI: 10.1007/s12015-020-09963-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Decellularized tissues and organs have aroused considerable interest for developing functional bio-scaffolds as natural templates in tissue engineering applications. More recently, the use of natural extracellular matrix (ECM) extracted from the in vitro cell cultures for cellular applications have come into question. It is well known that the microenvironment largely defines cellular properties. Thus, we have anticipated that the ECMs of the cells with different potency levels should likely possess different effects on cell cultures. To test this, we have comparatively evaluated the differentiative effects of ECMs derived from the cultures of human somatic dermal fibroblasts, human multipotent bone marrow mesenchymal stem cells, and human induced pluripotent stem cells on somatic dermal fibroblasts. Although challenges remain, the data suggest that the use of cell culture-based extracellular matrices perhaps may be considered as an alternative approach for the differentiation of even somatic cells into other cell types.
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Affiliation(s)
- Mahmut Parmaksiz
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, and Ankara University Stem Cell Institute, Ankara, Turkey
| | - Ayşe Eser Elçin
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, and Ankara University Stem Cell Institute, Ankara, Turkey
| | - Yaşar Murat Elçin
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, and Ankara University Stem Cell Institute, Ankara, Turkey. .,Biovalda Health Technologies, Inc, Ankara, Turkey.
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Attenuation of methylglyoxal-induced glycation and cellular dysfunction in wound healing by Centella cordifolia. Saudi J Biol Sci 2021; 28:813-824. [PMID: 33424371 DOI: 10.1016/j.sjbs.2020.11.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/25/2020] [Accepted: 11/01/2020] [Indexed: 01/13/2023] Open
Abstract
Current pre-clinical evidences of Centella focus on its pharmacological effects on normal wound healing but there are limited studies on the bioactivity of Centella in cellular dysfunction associated with diabetic wounds. Hence we planned to examine the potential of Centella cordifolia in inhibiting methylglyoxal (MGO)-induced extracellular matrix (ECM) glycation and promoting the related cellular functions. A Cell-ECM adhesion assay examined the ECM glycation induced by MGO. Different cell types that contribute to the healing process (fibroblasts, keratinocytes and endothelial cells) were evaluated for their ability to adhere to the glycated ECM. Methanolic extract of Centella species was prepared and partitioned to yield different solvent fractions which were further analysed by high performance liquid chromatography equipped with photodiode array detector (HPLC-PDA) method. Based on the antioxidant [2,2-diphenyl-1-picrylhydrazyl (DPPH) assay] screening, anti-glycation activity and total phenolic content (TPC) of the different Centella species and fractions, the ethyl acetate fraction of C. cordifolia was selected for further investigating its ability to inhibit MGO-induced ECM glycation and promote cellular distribution and adhesion. Out of the three Centella species (C. asiatica, C. cordifolia and C. erecta), the methanolic extract of C. cordifolia showed maximum inhibition of Advanced glycation end products (AGE) fluorescence (20.20 ± 4.69 %, 25.00 ± 3.58 % and 16.18 ± 1.40 %, respectively). Its ethyl acetate fraction was enriched with phenolic compounds (3.91 ± 0.12 mg CAE/μg fraction) and showed strong antioxidant (59.95 ± 7.18 μM TE/μg fraction) and antiglycation activities. Improvement of cells spreading and adhesion of endothelial cells, fibroblasts and keratinocytes was observed for ethyl acetate treated MGO-glycated extracellular matrix. Significant reduction in attachment capacity of EA.hy926 cells seeded on MGO-glycated fibronectin (41.2%) and attachment reduction of NIH3t3 and HaCaT cells seeded on MGO-glycated collagen (33.7% and 24.1%, respectively) were observed. Our findings demonstrate that ethyl acetate fraction of C. cordifolia was effective in attenuating MGO-induced glycation and cellular dysfunction in the in-vitro wound healing models suggesting that C. cordifolia could be a potential candidate for diabetic wound healing. It could be subjected for further isolation of new phytoconstituents having potential diabetic wound healing properties.
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Key Words
- AGA, minoguanidine hydrochloride
- AGEs, Advanced glycation end products
- AlCl3, Aluminum chloride
- Antiglycation
- BSA, Bovine serum albumin
- Centella
- DMEM, Dulbecco's Modified Eagle Medium
- DPPH, 2,2-diphenyl-1-picrylhydrazyl
- Diabetic complications
- EA, Ethyl acetate fraction
- ECM, Extracellular matrix
- FN, Fibronectin
- HEPES, Hydroxyethyl piperazineethanesulfonic acid
- HPLC-PDA
- HPLC-PDA, High performance liquid chromatography equipped with photodiode array detector
- HbA1c, Hemoglobin A1c
- MGO, Methylglyoxal
- Methylglyoxal
- NaNO2, Sodium nitrite
- NaOH, Sodium hydroxide
- PBS, Phosphate buffered saline
- RAGE, Receptor for advanced glycation endproducts
- ROS, Reactive oxygen species
- SDS-PAGE, Sodium dodecyl sulphate-polyacrylamide gel electrophoresis
- TLC, Thin-layer chromatography
- TNBSA, 2,4,6-trinitrobenzene sulfonic acid
- TNBSA, Trinitrobenzene sulfonic acid
- TPC, Total phenolic content
- Trolox, 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid
- Wounds
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Sereti M, Roy M, Zekeridou A, Gastaldi G, Giannopoulou C. Gingival crevicular fluid biomarkers in type 1 diabetes mellitus: A case-control study. Clin Exp Dent Res 2020; 7:170-178. [PMID: 33369174 PMCID: PMC8019764 DOI: 10.1002/cre2.351] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 11/02/2020] [Accepted: 11/03/2020] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVE The aim of the study is to compare the levels of Gingival Crevicular Fluid (GCF) interleukin 8 (IL-8), matrix metalloproteinase 8 (MMP-8) and advanced glycated-end products (AGEs) in a cohort of type 1 diabetic (T1D) subjects and healthy controls. MATERIAL AND METHODS GCF samples and periodontal examination were assessed in 50 subjects with T1D (30 males and 20 females; mean age: 35.2 years) recruited from the Diabetology Unit of the Geneva University Hospitals and in 50 control subjects matched for gender, age and smoking status. Samples were assessed for IL-8 and MMP-8 using a bead array multianalyte detection system and for AGEs the ELISA. The two groups were compared using the Wilcoxon signed rank test. RESULTS The mean HbA1c differed significantly between the groups (8.3% for the T1D group vs. 5.2% for the control group, p < 0.001). T1D subjects had significantly more plaque and gingival inflammation and presented more sites with bleeding on probing compared to the controls. The GCF levels of IL-8, MMP-8 and AGEs did not differ significantly between the groups. Further analysis of the GCF markers in younger (<40 years) and older (≥40 years) cohorts, revealed no significant differences between younger diabetics and controls or between older diabetics and controls. When the groups were divided according to their glycemic status (HbA1c 6.1-8, and > 8%), again no significant differences could be identified for any of the biochemical markers. CONCLUSIONS T1D subjects, particularly the younger ones, exhibited more inflammation compared to the matched healthy controls. Results on the GCF expression of IL-8, MMP-8 and AGEs did not differ between the groups. The diabetic population of our cohort was for the most part fairly-controlled, with little if any complications and with presence of only mild type of periodontal disease, as 68% had gingivitis.
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Affiliation(s)
- Maria Sereti
- Division of Regenerative Dentistry and Periodontology, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Margaux Roy
- Division of Regenerative Dentistry and Periodontology, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Alkisti Zekeridou
- Division of Regenerative Dentistry and Periodontology, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Giacomo Gastaldi
- Diabetology Unit, University Hospitals of Geneva, Geneva, Switzerland
| | - Catherine Giannopoulou
- Division of Regenerative Dentistry and Periodontology, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
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Effects of the age/rage axis in the platelet activation. Int J Biol Macromol 2020; 166:1149-1161. [PMID: 33161078 DOI: 10.1016/j.ijbiomac.2020.10.270] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/28/2020] [Accepted: 10/31/2020] [Indexed: 02/07/2023]
Abstract
Platelet activity is essential in cardiovascular diseases. Therefore our objective was to evaluate the main effects of activating RAGE in platelets which are still unknown. A search for RAGE expression in different databases showed poor or a nonexistent presence in platelets. We confirmed the expression in platelets and secreted variable of RAGE (sRAGE). Platelets from elderly adults expressed in resting showed 3.2 fold more RAGE from young individuals (p < 0.01) and 3.3 fold with TRAP-6 (p < 0.001). These results could indicate that the expression of RAGE is more inducible in older adults. Then we found that activating RAGE with AGE-BSA-derived from methylglyoxal and subthreshold TRAP-6, showed a considerable increase with respect to the control in platelet aggregation and expression of P-selectin (respectively, p < 0.01). This effect was almost completely blocked by using a specific RAGE inhibitor (FSP-ZM1), confirming that RAGE is important for the function and activation platelet. Finally, we predict the region stimulated by AGE-BSA is located in region V of RAGE and 13 amino acids are critical for its binding. In conclusion, the activation of RAGE affects platelet activation and 13 amino acids are critical for its stimulation, this information is crucial for future possible treatments for CVD.
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Ashour A, Xue M, Al-Motawa M, Thornalley PJ, Rabbani N. Glycolytic overload-driven dysfunction of periodontal ligament fibroblasts in high glucose concentration, corrected by glyoxalase 1 inducer. BMJ Open Diabetes Res Care 2020; 8:8/2/e001458. [PMID: 33115819 PMCID: PMC7594206 DOI: 10.1136/bmjdrc-2020-001458] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 09/23/2020] [Accepted: 09/26/2020] [Indexed: 02/06/2023] Open
Abstract
INTRODUCTION Patients with diabetes have increased risk of periodontal disease, with increased risk of weakening of periodontal ligament and tooth loss. Periodontal ligament is produced and maintained by periodontal ligament fibroblasts (PDLFs). We hypothesized that metabolic dysfunction of PDLFs in hyperglycemia produces an accumulation of the reactive glycating agent, methylglyoxal (MG), leading to increased formation of the major advanced glycation endproduct, MG-H1 and PDLF dysfunction. The aim of this study was to assess if there is dicarbonyl stress and functional impairment of human PDLFs in primary culture in high glucose concentration-a model of hyperglycemia, to characterize the metabolic drivers of it and explore remedial intervention by the glyoxalase 1 inducer dietary supplement, trans-resveratrol and hesperetin combination (tRES-HESP). RESEARCH DESIGN AND METHODS Human PDLFs were incubated in low and high glucose concentration in vitro. Metabolic and enzymatic markers of MG and glucose control were quantified and related changes in the cytoplasmic proteome and cell function-binding to collagen-I, assessed. Reversal of PDLF dysfunction by tRES-HESP was explored. RESULTS In high glucose concentration cultures, there was a ca. twofold increase in cellular MG, cellular protein MG-H1 content and decreased attachment of PDLFs to collagen-I. This was driven by increased hexokinase-2 linked glucose metabolism and related increased MG formation. Proteomics analysis revealed increased abundance of chaperonins, heat shock proteins (HSPs), Golgi-to-endoplasmic reticulum transport and ubiquitin E3 ligases involved in misfolded protein degradation in high glucose concentration, consistent with activation of the unfolded protein response by increased misfolded MG-modified proteins. PDLF dysfunction was corrected by tRES-HESP. CONCLUSIONS Increased hexokinase-2 linked glucose metabolism produces dicarbonyl stress, increased MG-modified protein, activation of the unfolded protein response and functional impairment of PDLFs in high glucose concentration. tRES-HESP resolves this at source by correcting increased glucose metabolism and may be of benefit in prevention of diabetic periodontal disease.
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Affiliation(s)
- Amal Ashour
- Speciality Clinics, University Dental Hospital, Taif Dental College, Taif University, Taif, Saudi Arabia
- Clinical Sciences Research Laboratories, Warwick Medical School, University of Warwick, University Hospital, Coventry, UK
| | - Mingzhan Xue
- Diabetes Research Center, Qatar Biomedical Research Institute, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Maryam Al-Motawa
- Diabetes Research Center, Qatar Biomedical Research Institute, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
- College of Health and Life Sciences, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Paul J Thornalley
- Clinical Sciences Research Laboratories, Warwick Medical School, University of Warwick, University Hospital, Coventry, UK
- Diabetes Research Center, Qatar Biomedical Research Institute, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
- College of Health and Life Sciences, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Naila Rabbani
- Department of Basic Medical Science, College of Medicine, QU Health, Qatar University, Doha, Qatar
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Mei YM, Li L, Wang XQ, Zhang M, Zhu LF, Fu YW, Xu Y. AGEs induces apoptosis and autophagy via reactive oxygen species in human periodontal ligament cells. J Cell Biochem 2020; 121:3764-3779. [PMID: 31680325 DOI: 10.1002/jcb.29499] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Accepted: 10/08/2019] [Indexed: 01/24/2023]
Abstract
The apoptosis of human periodontal ligament cells (HPDLCs) may be an important factor of the negative effect of advanced glycation end products (AGEs) on the periodontal tissue of diabetic patients. However, the pathways or potential effects of apoptosis in AGEs-treated HPDLCs have not been fully elucidated. Autophagy is closely related to apoptosis. Herein, we investigated the potential mechanism of apoptosis and autophagy in HPDLCs treated with AGEs via an in vitro model. We found that AGEs-treated HPDLCs showed a time- and concentration-dependent reduction in the cell survival rate. The mitochondrial-dependent apoptosis was induced in AGEs-treated HPDLCs, as confirmed by the mitochondrial membrane potential depolarization, decreased Bcl-2 expression, increased Bax expression, and increased caspase-3 and PARP cleavage. Autophagy was also induced in AGEs-treated HPDLCs, as indicated by the conversion of LC3-II/LC3-I and the presence of autophagosomes. Interestingly, our study results suggested that apoptosis and autophagy were related to reactive oxygen species (ROS) production. In addition, AGEs-induced autophagy acted as a latent factor in decreasing the generation of ROS in HPDLCs and protecting against the AGEs-induced apoptosis. In summary, our study shows that ROS are essential in AGEs-induced HPDLCs apoptosis and autophagy, which may be a molecular mechanism for the repairment of ROS-induced damage in HPDLCs treated with AGEs to promote cell survival. The present study might provide new insights into the therapeutic targeting of HPDLCs autophagy, which could be an additional strategy for periodontitis in patients with diabetes mellitus.
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Affiliation(s)
- You-Min Mei
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Periodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China.,Department of Periodontology, Nantong Stomatological Hospital, Nantong, China
| | - Lu Li
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Periodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Xiao-Qian Wang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Periodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Min Zhang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Periodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Li-Fang Zhu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Periodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Yong-Wei Fu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Periodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Yan Xu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.,Department of Periodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
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11
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Chen T, Dong J, Zhou H, Deng X, Li R, Chen N, Luo M, Li Y, Wu J, Wang L. Glycation of fibronectin inhibits VEGF-induced angiogenesis by uncoupling VEGF receptor-2-c-Src crosstalk. J Cell Mol Med 2020; 24:9154-9164. [PMID: 32613750 PMCID: PMC7417727 DOI: 10.1111/jcmm.15552] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 06/04/2020] [Accepted: 06/06/2020] [Indexed: 01/08/2023] Open
Abstract
Glycation of extracellular matrix proteins has been demonstrated to contribute to the pathogenesis of vascular complications. However, no previous report has shown the role of glycated fibronectin (FN) in vascular endothelial growth factor (VEGF)‐induced angiogenesis. Thus, this study aimed to investigate the effects of glycated FN on VEGF signalling and to clarify the molecular mechanisms involved. FN was incubated with methylglyoxal (MGO) in vitro to synthesize glycated FN, and human umbilical vein endothelial cells (HUVECs) were seeded onto unmodified and MGO‐glycated FN. Then, VEGF‐induced angiogenesis and VEGF‐induced VEGF receptor‐2 (VEGFR‐2) signalling activation were measured. The results demonstrated that normal FN‐positive bands (260 kD) vanished and advanced glycation end products (AGEs) appeared in MGO‐glycated FN and glycated FN clearly changed to a higher molecular mass. The glycation of FN inhibited VEGF‐induced VEGF receptor‐2 (VEGFR‐2), Akt and ERK1/2 activation and VEGF‐induced cell migration, proliferation and tube formation. The glycation of FN also inhibited the recruitment of c‐Src to VEGFR‐2 by sequestering c‐Src through receptor for AGEs (RAGE) and the anti‐RAGE antibody restored VEGF‐induced VEGFR‐2, Akt and ERK1/2 phosphorylation, endothelial cell migration, proliferation and tube formation. Furthermore, the glycation of FN significantly inhibited VEGF‐induced neovascularization in the Matrigel plugs implanted into subcutaneous tissue of mice. Taken together, these data suggest that the glycation of FN may inhibit VEGF signalling and VEGF‐induced angiogenesis by uncoupling VEGFR‐2‐c‐Src interaction. This may provide a novel mechanism for the impaired angiogenesis in diabetic ischaemic diseases.
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Affiliation(s)
- Tangting Chen
- Key Laboratory of Medical Electrophysiology, Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
| | - Jinling Dong
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Haiyan Zhou
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Xin Deng
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Rong Li
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Ni Chen
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Mao Luo
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Yongjie Li
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Jianbo Wu
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Liqun Wang
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
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12
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Naghshbandi J. The influence of local and systemic factors upon dental implant osseointegration: A critical review. SAUDI JOURNAL OF ORAL SCIENCES 2020. [DOI: 10.4103/sjos.sjoralsci_79_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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13
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Dandia H, Makkad K, Tayalia P. Glycated collagen – a 3D matrix system to study pathological cell behavior. Biomater Sci 2019; 7:3480-3488. [DOI: 10.1039/c9bm00184k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Anin vitro3D glycated matrix system to study the interplay of diabetes and cancer.
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Affiliation(s)
- Hiren Dandia
- Department of Biosciences & Bioengineering
- Indian Institute of Technology Bombay
- Mumbai
- India
| | - Khushi Makkad
- Department of Biosciences & Bioengineering
- Indian Institute of Technology Bombay
- Mumbai
- India
| | - Prakriti Tayalia
- Department of Biosciences & Bioengineering
- Indian Institute of Technology Bombay
- Mumbai
- India
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14
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Makkar H, Reynolds MA, Wadhawan A, Dagdag A, Merchant AT, Postolache TT. Periodontal, metabolic, and cardiovascular disease: Exploring the role of inflammation and mental health. Pteridines 2018; 29:124-163. [PMID: 30705520 PMCID: PMC6350811 DOI: 10.1515/pteridines-2018-0013] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Previous evidence connects periodontal disease, a modifiable condition affecting a majority of Americans, with metabolic and cardiovascular morbidity and mortality. This review focuses on the likely mediation of these associations by immune activation and their potential interactions with mental illness. Future longitudinal, and ideally interventional studies, should focus on reciprocal interactions and cascading effects, as well as points for effective preventative and therapeutic interventions across diagnostic domains to reduce morbidity, mortality and improve quality of life.
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Affiliation(s)
- Hina Makkar
- Mood and Anxiety Program, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Mark A Reynolds
- Department of Advanced Oral Sciences & Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Abhishek Wadhawan
- Mood and Anxiety Program, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Aline Dagdag
- Mood and Anxiety Program, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Anwar T Merchant
- Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA
| | - Teodor T Postolache
- Mood and Anxiety Program, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Rocky Mountain Mental Illness Research Education and Clinical Center (MIRECC), Veterans Integrated Service Network (VISN) 19, Military and Veteran Microbiome Consortium for Research and Education (MVM-CoRE), Denver, CO 80220, USA; Mental Illness Research, Education and Clinical Center (MIRECC), Veterans Integrated Service Network (VISN) 5, VA Capitol Health Care Network, Baltimore, MD 21201, USA,
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15
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Li S, Liu X, Zhou Y, Acharya A, Savkovic V, Xu C, Wu N, Deng Y, Hu X, Li H, Haak R, Schmidt J, Shang W, Pan H, Shang R, Yu Y, Ziebolz D, Schmalz G. Shared genetic and epigenetic mechanisms between chronic periodontitis and oral squamous cell carcinoma. Oral Oncol 2018; 86:216-224. [DOI: 10.1016/j.oraloncology.2018.09.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Revised: 09/15/2018] [Accepted: 09/28/2018] [Indexed: 12/11/2022]
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16
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Reactive carbonyl compounds impair wound healing by vimentin collapse and loss of the primary cilium. Food Chem Toxicol 2017; 108:128-138. [DOI: 10.1016/j.fct.2017.07.055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 07/16/2017] [Accepted: 07/27/2017] [Indexed: 12/20/2022]
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17
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Retamal IN, Hernández R, Melo F, Zapata P, Martínez C, Martínez J, Smith PC. Glycated Collagen Stimulates Differentiation of Gingival Myofibroblasts. J Periodontol 2017; 88:926-935. [DOI: 10.1902/jop.2017.160730] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Ignacio N. Retamal
- Department of Dentistry, Faculty of Medicine, Pontifical Catholic University of Chile (Pontificia Universidad Católica de Chile), Santiago, Chile
| | - Romina Hernández
- Department of Dentistry, Faculty of Medicine, Pontifical Catholic University of Chile (Pontificia Universidad Católica de Chile), Santiago, Chile
| | - Francisco Melo
- Physics Department, University of Santiago, Santiago, Chile
- Soft Matter Research and Technology Center, University of Santiago
| | - Paulina Zapata
- Department of Dentistry, Faculty of Medicine, Pontifical Catholic University of Chile (Pontificia Universidad Católica de Chile), Santiago, Chile
| | - Constanza Martínez
- Department of Dentistry, Faculty of Medicine, Pontifical Catholic University of Chile (Pontificia Universidad Católica de Chile), Santiago, Chile
| | - Jorge Martínez
- Institute of Nutrition and Food Technology, Laboratory of Cell Biology, University of Chile, Santiago, Chile
| | - Patricio C. Smith
- Department of Dentistry, Faculty of Medicine, Pontifical Catholic University of Chile (Pontificia Universidad Católica de Chile), Santiago, Chile
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18
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Dornuf F, Martín-Mateos P, Duarte B, Hils B, Bonilla-Manrique OE, Larcher F, Acedo P, Krozer V. Classification of skin phenotypes caused by diabetes mellitus using complex scattering parameters in the millimeter-wave frequency range. Sci Rep 2017; 7:5822. [PMID: 28724970 PMCID: PMC5517582 DOI: 10.1038/s41598-017-06034-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 06/06/2017] [Indexed: 11/30/2022] Open
Abstract
The pathological skin phenotype caused by hyperglycemia is an important indicator for the progress of diabetes mellitus. An early detection of diabetes assures an early intervention to regulate the carbohydrate metabolism. In this publication a non-invasive detection principle based on the measurement of complex scattering parameters in the millimeter-wave frequency range is presented. The measurement principle provides evidence of the applicability for the identification of different glycemic states in animal models. The method proposed here can be used to predict diabetes status in animal models and is interesting for application on humans in view of safeness of millimeter-wave radiation. Furthermore the complex scattering parameters give important information about the anatomic varieties between the analyzed skin samples of the different mice strains. In contrast to other methods, our approach is less sensitive to skin variations between animals.
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Affiliation(s)
- Fabian Dornuf
- Physics Institute, Goethe University Frankfurt am Main, 60438, Frankfurt am Main, Germany.
| | - Pedro Martín-Mateos
- Department of Electronics Technology, Universidad Carlos III de Madrid, Leganes, Madrid, 28911, Spain
| | - Blanca Duarte
- Epithelial Biomedicine Division, CIEMAT, Avenida Complutense 40, Madrid, 28040, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain
| | - Bernhard Hils
- Physics Institute, Goethe University Frankfurt am Main, 60438, Frankfurt am Main, Germany
| | | | - Fernando Larcher
- Epithelial Biomedicine Division, CIEMAT, Avenida Complutense 40, Madrid, 28040, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain.,Department of Bioengineering, Universidad Carlos III de Madrid, Leganes, Madrid, 28911, Spain.,Instituto de Investigaciones sanitarias de la Fundación Jimenez Diaz (IIS-FJD), Madrid, Spain
| | - Pablo Acedo
- Department of Electronics Technology, Universidad Carlos III de Madrid, Leganes, Madrid, 28911, Spain
| | - Viktor Krozer
- Physics Institute, Goethe University Frankfurt am Main, 60438, Frankfurt am Main, Germany
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19
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Chiquet M, Katsaros C, Kletsas D. Multiple functions of gingival and mucoperiosteal fibroblasts in oral wound healing and repair. Periodontol 2000 2017; 68:21-40. [PMID: 25867977 DOI: 10.1111/prd.12076] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/01/2014] [Indexed: 12/22/2022]
Abstract
Fibroblasts are cells of mesenchymal origin. They are responsible for the production of most extracellular matrix in connective tissues and are essential for wound healing and repair. In recent years, it has become clear that fibroblasts from different tissues have various distinct traits. Moreover, wounds in the oral cavity heal under very special environmental conditions compared with skin wounds. Here, we reviewed the current literature on the various interconnected functions of gingival and mucoperiosteal fibroblasts during the repair of oral wounds. The MEDLINE database was searched with the following terms: (gingival OR mucoperiosteal) AND fibroblast AND (wound healing OR repair). The data gathered were used to compare oral fibroblasts with fibroblasts from other tissues in terms of their regulation and function during wound healing. Specifically, we sought answers to the following questions: (i) what is the role of oral fibroblasts in the inflammatory response in acute wounds; (ii) how do growth factors control the function of oral fibroblasts during wound healing; (iii) how do oral fibroblasts produce, remodel and interact with extracellular matrix in healing wounds; (iv) how do oral fibroblasts respond to mechanical stress; and (v) how does aging affect the fetal-like responses and functions of oral fibroblasts? The current state of research indicates that oral fibroblasts possess unique characteristics and tightly controlled specific functions in wound healing and repair. This information is essential for developing new strategies to control the intraoral wound-healing processes of the individual patient.
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20
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Martín-Mateos P, Dornuf F, Duarte B, Hils B, Moreno-Oyervides A, Bonilla-Manrique OE, Larcher F, Krozer V, Acedo P. In-vivo, non-invasive detection of hyperglycemic states in animal models using mm-wave spectroscopy. Sci Rep 2016; 6:34035. [PMID: 27669659 PMCID: PMC5037419 DOI: 10.1038/srep34035] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 09/07/2016] [Indexed: 01/21/2023] Open
Abstract
Chronic or sustained hyperglycemia associated to diabetes mellitus leads to many medical complications, thus, it is necessary to track the evolution of patients for providing the adequate management of the disease that is required for the restoration of the carbohydrate metabolism to a normal state. In this paper, a novel monitoring approach based on mm-wave spectroscopy is comprehensively described and experimentally validated using living animal models as target. The measurement method has proved the possibility of non-invasive, in-vivo, detection of hyperglycemia-associated conditions in different mouse models, making possible to clearly differentiate between several hyperglycemic states.
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Affiliation(s)
- Pedro Martín-Mateos
- Department of Electronics Technology, Universidad Carlos III de Madrid, Leganes, Madrid 28911, Spain
| | - Fabian Dornuf
- Physics Institute, Goethe University Frankfurt am Main, 60438 Frankfurt am Main, Germany
| | - Blanca Duarte
- Epithelial Biomedicine Division, CIEMAT, Avenida Complutense 40, Madrid, 28040, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain
| | - Bernhard Hils
- Physics Institute, Goethe University Frankfurt am Main, 60438 Frankfurt am Main, Germany
| | - Aldo Moreno-Oyervides
- Department of Electronics Technology, Universidad Carlos III de Madrid, Leganes, Madrid 28911, Spain
| | | | - Fernando Larcher
- Epithelial Biomedicine Division, CIEMAT, Avenida Complutense 40, Madrid, 28040, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain
- Department of Bioengineering, Universidad Carlos III de Madrid, Leganes, Madrid 28911, Spain
- Instituto de Investigaciones sanitarias de la Fundación Jimenez Diaz (IIS-FJD), Madrid, Spain
| | - Viktor Krozer
- Physics Institute, Goethe University Frankfurt am Main, 60438 Frankfurt am Main, Germany
| | - Pablo Acedo
- Department of Electronics Technology, Universidad Carlos III de Madrid, Leganes, Madrid 28911, Spain
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21
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Retamal IN, Hernández R, González-Rivas C, Cáceres M, Arancibia R, Romero A, Martínez C, Tobar N, Martínez J, Smith PC. Methylglyoxal and methylglyoxal-modified collagen as inducers of cellular injury in gingival connective tissue cells. J Periodontal Res 2016; 51:812-821. [DOI: 10.1111/jre.12365] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/18/2015] [Indexed: 12/15/2022]
Affiliation(s)
- I. N. Retamal
- Dentistry Faculty of Medicine; Pontificia Universidad Católica de Chile; Santiago Chile
| | - R. Hernández
- Dentistry Faculty of Medicine; Pontificia Universidad Católica de Chile; Santiago Chile
| | - C. González-Rivas
- Dentistry Faculty of Medicine; Pontificia Universidad Católica de Chile; Santiago Chile
| | - M. Cáceres
- Molecular and Cell Biology Program; Facultad de Medicina; Universidad de Chile; Santiago Chile
| | - R. Arancibia
- Dentistry Faculty of Medicine; Pontificia Universidad Católica de Chile; Santiago Chile
| | - A. Romero
- Molecular and Cell Biology Program; Facultad de Medicina; Universidad de Chile; Santiago Chile
| | - C. Martínez
- Dentistry Faculty of Medicine; Pontificia Universidad Católica de Chile; Santiago Chile
| | - N. Tobar
- Institute of Nutrition and Food Technology; Laboratory of Cell Biology, University of Chile; Santiago Chile
| | - J. Martínez
- Institute of Nutrition and Food Technology; Laboratory of Cell Biology, University of Chile; Santiago Chile
| | - P. C. Smith
- Dentistry Faculty of Medicine; Pontificia Universidad Católica de Chile; Santiago Chile
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22
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Sima C, Van Dyke TE. Therapeutic Targets for Management of Periodontitis and Diabetes. Curr Pharm Des 2016; 22:2216-37. [PMID: 26881443 PMCID: PMC4854768 DOI: 10.2174/1381612822666160216150338] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 02/15/2016] [Indexed: 11/22/2022]
Abstract
The increasing incidence of diabetes mellitus (DM) and chronic periodontitis (CP) worldwide imposes a rethinking of individualized therapy for patients with both conditions. Central to bidirectional links between DM and CP is deregulated systemic inflammation and dysfunctional immune responses to altered-self and non-self. Control of blood glucose levels and metabolic imbalances associated with hyperglycemia in DM, and disruption of pathogenic subgingival biofilms in CP are currently the main therapeutic approaches for these conditions. Mounting evidence suggests the need to integrate immune modulatory therapeutics in treatment regimens that address the unresolved inflammation associated with DM and CP. The current review discusses the pathogenesis of DM and CP with emphasis on deregulated inflammation, current therapeutic approaches and the novel pro-resolution lipid mediators derived from Ω-3 polyunsaturated fatty acids.
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Affiliation(s)
- Corneliu Sima
- Corneliu Sima, 245 First Street, Room 5145, Cambridge, MA, 02142, USA.
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23
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Liu Z, Zhou W, Tangl S, Liu S, Xu X, Rausch-Fan X. Potential mechanism for osseointegration of dental implants in Zucker diabetic fatty rats. Br J Oral Maxillofac Surg 2015; 53:748-53. [PMID: 26093969 DOI: 10.1016/j.bjoms.2015.05.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 05/28/2015] [Indexed: 11/15/2022]
Abstract
Our aim was to investigate the impact of diabetes mellitus and different durations of glycaemic control on early osseointegration of dental implants, and to explore possible mechanisms by measuring the expression of integrin α5β1 and fibronectin in bone around the implant. We divided 33 male Zucker diabetic fatty (ZDF) rats aged 3 months into 3 groups. The first group comprised diabetic rats with dental implants (controls); the second group was treated with insulin and implants were placed simultaneously (exenatide alone group); and the third group was treated with insulin until the serum glucose was at a constant concentration (< 16 mmol/L), and implants were then inserted (exenatide+normal glucose group). Rats were killed 7, 14, 30, and 60 days after implants had been inserted. The expression of integrin α5β1 and fibronectin in bone around the implants was detected by immunohistochemical analysis in each group. The expression in the exenatide+normal glucose group was stronger than in the other 2 groups. Fourteen days after implantation, expression of integrin α5β1 in the exenatide alone group was significantly stronger than that in the control group (p=0.027), and 60 days after implantation the expression of fibronectin in the exenatide alone group was also significantly stronger than that among the controls (p=0.001). Both fibronectin and integrin α5β1 participate in the adhesion of osteoblasts and act as signals at the bone/implant interface. Diabetes interferes with the osseointegration of implants by deferring expression of fibronectin and integrin α5β1.
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Affiliation(s)
- Zhonghao Liu
- Department of Implant Dentistry, School of Stomatology, Shandong University, No.44-1 West culture road, Lixia District, Jinan 250012, P.R. China; Department of Dental Implantology, Yantai Stomatological Hospital, No. 142, North Great Str., Zhifu District, Yantai 264008, P.R. China
| | - Wenjuan Zhou
- Department of Dental Implantology, Yantai Stomatological Hospital, No. 142, North Great Str., Zhifu District, Yantai 264008, P.R. China; Orthodontics & Periodontology Research Unit, Bernhard-Gottlieb-University Clinic of Dentistry, Sensengasse 2a-1090 Vienna, Austria
| | - Stefan Tangl
- Department of Oral Surgery, Medical University of Vienna, Sensengasse 2a-1090 Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Shutai Liu
- Department of Dental Implantology, Yantai Stomatological Hospital, No. 142, North Great Str., Zhifu District, Yantai 264008, P.R. China
| | - Xin Xu
- Department of Implant Dentistry, School of Stomatology, Shandong University, No.44-1 West culture road, Lixia District, Jinan 250012, P.R. China.
| | - Xiaohui Rausch-Fan
- Department of Dental Implantology, Yantai Stomatological Hospital, No. 142, North Great Str., Zhifu District, Yantai 264008, P.R. China; Orthodontics & Periodontology Research Unit, Bernhard-Gottlieb-University Clinic of Dentistry, Sensengasse 2a-1090 Vienna, Austria
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24
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Abstract
Diabetes mellitus (DM) is one of the severe metabolic disorders of carbohydrate metabolism worldwide. Developing countries are at higher risk of DM, and there is significant evidence that it is epidemic in many economically developing and newly industrialized countries. Among all other complications associated with DM, delayed wound healing is a major concern in diabetic patients. Wound healing is a natural healing process that starts immediately after injury. This involves interaction of a complex cascade of cellular events that generates resurfacing, reconstitution, and restoration of the tensile strength of injured skin. There are multiple factors responsible for delayed wound healing among which the contribution of DM has been well documented. The wound healing process is also delayed by the metabolic, vascular, neurological, and inflammatory alterations, which are well known in both type 1 and type 2 diabetes. Keratinocytes are crucial for wound re-epithelialization, and defects in directed migration of keratinocytes due to DM are associated with the delayed wound healing process. Many factors responsible for re-epithelialization have been identified, characterized, and well described; however, the genes responsible for the healing process have only partially been illustrated. This article will therefore focus on the efficacy of ANGPTL4 (angiopoietin-like 4) gene, which plays a novel role in keratinocyte migration during wound healing.
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Affiliation(s)
- Awadhesh K Arya
- 1Centre for Genetic Disorders, Banaras Hindu University, Varanasi, INDIA
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25
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Li DX, Deng TZ, Lv J, Ke J. Advanced glycation end products (AGEs) and their receptor (RAGE) induce apoptosis of periodontal ligament fibroblasts. ACTA ACUST UNITED AC 2014. [PMID: 25387669 PMCID: PMC4244668 DOI: 10.1590/1414-431x20143996] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Diabetics have an increased prevalence of periodontitis, and diabetes is one of the
causative factors of severe periodontitis. Apoptosis is thought to be involved in
this pathogenic relationship. The aim of this study was to investigate apoptosis in
human periodontal ligament (PDL) fibroblasts induced by advanced glycation end
products (AGEs) and their receptor (RAGE). We examined the roles of apoptosis, AGEs,
and RAGE during periodontitis in diabetes mellitus using cultured PDL fibroblasts
that were treated by AGE-modified bovine serum albumin (AGE-BSA), bovine serum
albumin (BSA) alone, or given no treatment (control). Microscopy and real-time
quantitative PCR indicated that PDL fibroblasts treated with AGE-BSA were deformed
and expressed higher levels of RAGE and caspase 3. Cell viability assays and flow
cytometry indicated that AGE-BSA reduced cell viability (69.80±5.50%, P<0.01) and
increased apoptosis (11.31±1.73%, P<0.05). Hoechst 33258 staining and
terminal-deoxynucleotidyl transferase-mediated nick-end labeling revealed that
AGE-BSA significantly increased apoptosis of PDL fibroblasts. The results showed that
the changes in PDL fibroblasts induced by AGE-BSA may explain how AGE-RAGE
participates in and exacerbates periodontium destruction.
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Affiliation(s)
- D X Li
- Department of Stomatology, Air Force General Hospital PLA, Haidian District, Beijing, China
| | - T Z Deng
- Department of Stomatology, Air Force General Hospital PLA, Haidian District, Beijing, China
| | - J Lv
- Department of Stomatology, Air Force General Hospital PLA, Haidian District, Beijing, China
| | - J Ke
- Department of Stomatology, Air Force General Hospital PLA, Haidian District, Beijing, China
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26
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Roca F, Grossin N, Chassagne P, Puisieux F, Boulanger E. Glycation: the angiogenic paradox in aging and age-related disorders and diseases. Ageing Res Rev 2014; 15:146-60. [PMID: 24742501 DOI: 10.1016/j.arr.2014.03.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 03/26/2014] [Accepted: 03/31/2014] [Indexed: 01/09/2023]
Abstract
Angiogenesis is generally a quiescent process which, however, may be modified by different physiological and pathological conditions. The "angiogenic paradox" has been described in diabetes because this disease impairs the angiogenic response in a manner that differs depending on the organs involved and disease evolution. Aging is also associated with pro- and antiangiogenic processes. Glycation, the post-translational modification of proteins, increases with aging and the progression of diabetes. The effect of glycation on angiogenesis depends on the type of glycated proteins and cells involved. This complex link could be responsible for the "angiogenic paradox" in aging and age-related disorders and diseases. Using diabetes as a model, the present work has attempted to review the age-related angiogenic paradox, in particular the effects of glycation on angiogenesis during aging.
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Affiliation(s)
- F Roca
- Vascular Aging Biology, Blood-Vessel Interface and Vascular Repair Unit, Lille School of Medicine, Lille2 University, Lille, France; Geriatrics Department, Rouen University Hospital, Rouen, France.
| | - N Grossin
- Vascular Aging Biology, Blood-Vessel Interface and Vascular Repair Unit, Lille School of Medicine, Lille2 University, Lille, France
| | - P Chassagne
- Geriatrics Department, Rouen University Hospital, Rouen, France
| | - F Puisieux
- Vascular Aging Biology, Blood-Vessel Interface and Vascular Repair Unit, Lille School of Medicine, Lille2 University, Lille, France; Gerontology Clinic, Les Bateliers Geriatric Hospital, Lille University Hospital, Lille, France
| | - E Boulanger
- Vascular Aging Biology, Blood-Vessel Interface and Vascular Repair Unit, Lille School of Medicine, Lille2 University, Lille, France; Gerontology Clinic, Les Bateliers Geriatric Hospital, Lille University Hospital, Lille, France
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27
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Boonkaew B, Tompkins K, Manokawinchoke J, Pavasant P, Supaphol P. Characterization and cytological effects of a novel glycated gelatine substrate. Biomed Mater 2014; 9:025001. [DOI: 10.1088/1748-6041/9/2/025001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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28
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Colenci R, da Silva Assunção LR, Mogami Bomfim SR, de Assis Golim M, Deffune E, Penha Oliveira SH. Bone marrow mesenchymal stem cells stimulated by bFGF up-regulated protein expression in comparison with periodontal fibroblasts in vitro. Arch Oral Biol 2013; 59:268-76. [PMID: 24581848 DOI: 10.1016/j.archoralbio.2013.11.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 08/14/2013] [Accepted: 11/30/2013] [Indexed: 11/19/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate, in vitro, the role of bFGF in the proliferation and expression of collagen type I and fibronectin of dog bone marrow mesenchymal stem cells (dBMMSCs) in comparison with the expression of the same proteins in dog periodontal fibroblasts (dPLFs). DESIGN dBMMSCs from the iliac crest were cultivated in Dulbecco's Modified Eagle's Medium (DMEM). Flow cytometry analysis (FCA) was used to characterize dBMMSC. Cells were stimulated with bFGF (1, 5 and 10 ng/mL) after 24 and 48 h. Real time RT-PCR was performed to verify collagen type I and fibronectin expressions. MTT assay was used to confirm cellular proliferation. Statistical analyses were performed (ANOVA and Kruskal-Wallis tests; p<0.05). RESULTS FCA showed 55.98% of CD34+ and 32.67% of CD90+ after bone marrow aspiration; 3.33% of CD34+ and 33.0% of CD90+ before P1. After P2, 10.54% of dBMMSCs expressed CD90, whereas after P3, this number decreased to 1.58%. dPLFs presented 4.04% of CD90+ and 1.05% of CD34+ after P3. MTT evaluation showed increase in dBMSC proliferation with 5 ng/mL bFGF-stimulus after 24-h. Both collagen I and fibronectin expression were very similar between the two cells groups after 24-h stimulation with 1 ng/mL bFGF concentration. Fibronectin and collagen I expressions were higher after 24-h stimulation with 5 ng/mL bFGF. CONCLUSION dBMMSCs (1 ng/mL-bFGF stimulus after 24 h) are very similar to dPLFs as regards morphological and immunostaining characteristics, and collagen and/or fibronectin production. The dBMMSCs presented the highest protein expression rates with 5 ng/mL-bFGF stimulus after 24-h.
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Affiliation(s)
- Renato Colenci
- DDS, School of Dentistry, UNESP - Univ. Estadual Paulista, São Paulo, Brazil
| | | | - Suely Regina Mogami Bomfim
- Department of Clinics, Surgery and Animal Reproduction, School of Veterinary Medicine, UNESP - Univ. Estadual Paulista, São Paulo, Brazil
| | - Marjorie de Assis Golim
- Laboratory of Flow Cytometry, Botucatu Blood Center, School of Medicine, UNESP - Univ. Estadual Paulista, São Paulo, Brazil
| | - Elenice Deffune
- Laboratory of Cellular Engineering, Botucatu Blood Center, School of Medicine, UNESP - Univ. Estadual Paulista, São Paulo, Brazil
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Roy DC, Mooney NA, Raeman CH, Dalecki D, Hocking DC. Fibronectin matrix mimetics promote full-thickness wound repair in diabetic mice. Tissue Eng Part A 2013; 19:2517-26. [PMID: 23808793 DOI: 10.1089/ten.tea.2013.0024] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
During tissue repair, fibronectin is converted from a soluble, inactive form into biologically active extracellular matrix (ECM) fibrils through a cell-dependent process. ECM fibronectin promotes numerous cell processes that are critical to tissue repair and regulates the assembly of other proteins into the matrix. Nonhealing wounds show reduced levels of ECM fibronectin. To functionally mimic ECM fibronectin, a series of fibronectin matrix mimetics was developed by directly coupling the matricryptic, heparin-binding fragment of the first type III repeat of fibronectin (FNIII1H) to various sequences from the integrin-binding domain (FNIII8-10). The recombinant proteins were produced as glutathione-S-transferase (GST)-tagged fusion proteins for ease of production and purification. Full-thickness, excisional wounds were produced in genetically diabetic mice, and fibronectin matrix mimetics were applied directly to the wounds. A significant enhancement of wound closure was observed by day 9 in response to GST/III1H,8-10 versus GST-treated controls (73.9%±4.1% vs. 58.1%±4.7% closure, respectively). Two weeks after injury, fibronectin matrix mimetic-treated wounds had developed a multi-layered epithelium that completely covered the wound space. Furthermore, significant increases in granulation tissue thickness were observed in response to treatment with GST/III1H,8-10 (4.05±0.93-fold), GST/III1H,8,10 (2.91±0.49-fold), or GST/III1H,8(RGD) (3.55±0.59-fold) compared with GST controls, and was accompanied by dense collagen deposition, the presence of myofibroblasts, and functional vasculature. Thus, the recombinant fibronectin matrix analogs normalized the impairment in repair observed in this chronic wound model and may provide a new approach to accelerate the healing of diabetic wounds.
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Affiliation(s)
- Daniel C Roy
- 1 Department of Biomedical Engineering, University of Rochester , Rochester, New York
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Abstract
A bidirectional relationship between diabetes mellitus (DM) and periodontal diseases (PDs) has been established. It is estimated that patients with poorly controlled DM are 3 times more likely to develop chronic PD compared with normoglycemic individuals despite similar composition in subgingival biofilms. Furthermore, these patients present with increased severity and rapid progression of attachment loss around teeth resulting in edentulism. Treatment of PD results in a modest but significant improvement in glycemic control in patients with DM reflected by a 0.4 % reduction in HbA1c-glycated hemoglobin levels. Compelling evidence from in vitro and animal studies supports a plausible biological explanation for the relationship between the 2 conditions centered on systemic low-grade inflammation. However, the limited number of comparable large randomized clinical trials is reflected in the limited specific guidelines offered by the international organizations for DM and PD regarding the management of the 2 diseases in an individual.
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Affiliation(s)
- Corneliu Sima
- Matrix Dynamics Group, Room 221 Fitzgerald Building, 150 College Street, Toronto, Ontario M5S 3E2, Canada
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Comparison of self-perceived oral health, periodontal inflammatory conditions and socioeconomic status in individuals with and without prediabetes. Am J Med Sci 2012; 344:100-4. [PMID: 22157389 DOI: 10.1097/maj.0b013e31823650a7] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
INTRODUCTION The aim was to compare the self-perceived oral health, periodontal inflammatory conditions and socioeconomic status (SES) in patients with and without prediabetes. METHODS Thirty-nine individuals [19 patients with prediabetes (test group) and 20 control individuals (control group)], at least 20 years old were included. Plaque index, bleeding on probing, probing depth (4 to <6 mm and ≥6 mm) and number of missing teeth were recorded. Fasting blood glucose levels were recorded, and marginal bone loss was measured on radiographs. SES, education status, self-perceived oral health, family history of diabetes and tobacco habits were also investigated. RESULTS Mean ages of individuals in the test and control groups were 40.6 and 42.3 years, respectively. Plaque index, bleeding on probing, probing depth (4 to <6 mm and ≥6 mm) and number of missing teeth were higher in the test group as compared with the control group (P < 0.05). Premolar and molar marginal bone loss was higher in the test group as compared with the control group (P < 0.001). Self-perceived bleeding gums was more often reported by individuals in the test group as compared with the control group. A poor SES and education status was higher among individuals in the test group as compared with the control group (P < 0.001). CONCLUSIONS Self-perceived gingival bleeding and clinical periodontal inflammation were severe in patients with prediabetes as compared with controls. An underprivileged SES aggravated periodontal conditions in patients with prediabetes.
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Chang PC, Chien LY, Chong LY, Kuo YP, Hsiao JK. Glycated matrix up-regulates inflammatory signaling similarly to Porphyromonas gingivalis lipopolysaccharide. J Periodontal Res 2012; 48:184-93. [PMID: 22924807 DOI: 10.1111/j.1600-0765.2012.01519.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/27/2012] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND OBJECTIVE Hyperglycemia and advanced glycation end-products (AGEs) have been hypothesized as the etiologic factors of diabetic periodontitis. The aim of this study was to clarify in greater detail the patterns of AGE-mediated periodontal inflammation under various physiological conditions. MATERIAL AND METHODS The deposition of AGEs and expression of the receptor for AGEs (RAGE) were identified by immunohistochemistry in Sprague-Dawley rats with experimentally induced periodontitis or diabetes. Human periodontal ligament cells (PDLCs) and mesenchymal stem cells (MSCs) were cultured under simulated conditions of hyperglycemia, Porphyromonas gingivalis lipopolysaccharide (LPS) stimulation and matrix glycation. Cell viability and expression of toll-like receptors (TLRs), Rage, an inflammatory signaling initiator (nuclear factor kappa light chain enhancer of activator β cells), an oxidative stressor (heme oxygenase-1) and collagen synthesis (type I and type IV) genes were evaluated. RESULTS The deposition of AGEs and the expression of Rage were evident in the inflamed periodontal tissues in all rats and appeared to be enhanced in rats with diabetes. Matrix glycation augmented cytotoxicity, up-regulated RAGE and TLRs in both PDLCs and MSCs, and significantly activated downstream inflammatory signaling in MSCs. Oxidative stress was significantly increased under matrix glycation in both PDLCs and MSCs and was significantly increased at a high-glucose concentration in MSCs. A consistent decrease in expression of type I and type IV collagens was observed in MSCs, but a delayed reduction was noted in PDLCs. CONCLUSIONS Matrix glycation modulated cell behavior to induce inflammation equivalent to that produced by incubation with P. gingivalis LPS. Periodontal inflammation also led to matrix glycation, thus demonstrating a definite interaction between diabetes and periodontitis.
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Affiliation(s)
- P-C Chang
- Faculty of Dentistry, National University of Singapore, Singapore, Singapore.
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Pietropaoli D, Monaco A, Del Pinto R, Cifone MG, Marzo G, Giannoni M. Advanced glycation end products: possible link between metabolic syndrome and periodontal diseases. Int J Immunopathol Pharmacol 2012; 25:9-17. [PMID: 22507312 DOI: 10.1177/039463201202500102] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
On a planetary scale, Metabolic Syndrome (MetS)is the third cause of inability after malnutrition and nicotinism, even higher than water shortage and sedentariness. In the USA, the prevalence is estimated at over 25 percent of the population; in Italy, it involves approximately 25 percent of men and even 27 percent of women. These are very high figures, corresponding to approximately 14 million affected individuals. The prevalence is alarming and must not be underestimated, particularly in the dental field, where more than one patient out of four sitting in a dentist chair is affected. The etiology of periodontal disease has not yet been clarified, and recently the idea to consider it as a multifactor pathology has been developed. Cofactors such as the formation of free radicals of oxygen (ROS), oxidative stress, lipid peroxidation, and formation of glycation end-products (AGEs) probably play an important role in the onset of periodontal disease. The AGEs are compounds physiologically produced by the cells. However, they accumulate and cause pro-inflammatory conditions, when the cellular clearance fails, or in hyperglycemic and oxidative states. All these conditions can be clinically summarized as Metabolic Syndrome. The purpose of this literature review is to establish a relationship between two pathologies with very high prevalence: Metabolic Syndrome and Periodontal Disorder. The literature seems to have clarified that MetS involves a pro-oxidation status, which induces AGE formation. AGEs play a very important role in the course and severity of periodontal diseases.
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Affiliation(s)
- D Pietropaoli
- Department of Health Sciences, University of L'Aquila, Faculty of Medicine and Surgery, L'Aguila, Italy.
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Abstract
Diabetes mellitus (a group of metabolic disorders characterized by hyperglycemia) and periodontitis (a microbially induced inflammatory disorder that affects the supporting structures of teeth) are both common, chronic conditions. Multiple studies have demonstrated that diabetes mellitus (type 1 and type 2) is an established risk factor for periodontitis. Findings from mechanistic studies indicate that diabetes mellitus leads to a hyperinflammatory response to the periodontal microbiota and also impairs resolution of inflammation and repair, which leads to accelerated periodontal destruction. The cell surface receptor for advanced glycation end products and its ligands are expressed in the periodontium of individuals with diabetes mellitus and seem to mediate these processes. The association between the two diseases is bidirectional, as periodontitis has been reported to adversely affect glycemic control in patients with diabetes mellitus and to contribute to the development of diabetic complications. In addition, meta-analyses conclude that periodontal therapy in individuals with diabetes mellitus can result in a modest improvement of glycemic control. The effect of periodontal infections on diabetes mellitus is potentially explained by the resulting increase in levels of systemic proinflammatory mediators, which exacerbates insulin resistance. As our understanding of the relationship between diabetes mellitus and periodontitis deepens, increased patient awareness of the link between diabetes mellitus and oral health and collaboration among medical and dental professionals for the management of affected individuals become increasingly important.
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Affiliation(s)
- Evanthia Lalla
- Division of Periodontics, College of Dental Medicine, Columbia University, 630 West 168th Street, PH7E-110, New York, NY 10032, USA.
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Abstract
OBJECTIVE To assess the hypothesis that retinopathies are indicative of systemic microvascular injury. RESEARCH DESIGN AND METHODS The only U.S. national survey assessing microvascular hemorrhaging at two distinct anatomical sites was the National Health and Nutrition Examination Survey (1988-1994). The systemic microvascular injury hypothesis was assessed by modeling the association of retinal and gingival hemorrhaging and the factors that explain this association. RESULTS Individuals in whom one or more in five gingival sites was hemorrhaging had a 57% increased odds for retinal hemorrhaging (95% CI: 1.26-1.94). This association between retinal and gingival hemorrhaging was 51% explained by A1C concentrations. Retinal and gingival hemorrhaging exhibited the signature J-shaped prevalence patterns when plotted as a function of A1C concentrations. CONCLUSIONS Gingival hemorrhaging reflected on retinal hemorrhaging, and both shared chronic hyperglycemia as an explanatory marker. These epidemiological findings support the hypothesis that retinopathies are reflective of systemic microvascular injury.
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Affiliation(s)
- Philippe P Hujoel
- Department of Epidemiology, School of Public Health, University of Washington, Seattle, Washington, USA.
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Pietropaoli D, Tatone C, D'Alessandro AM, Monaco A. Possible involvement of advanced glycation end products in periodontal diseases. Int J Immunopathol Pharmacol 2010; 23:683-91. [PMID: 20943037 DOI: 10.1177/039463201002300301] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Periodontal diseases are considered as multifactorial conditions initiated by infection with pathogenic bacteria, promoted by inflammation and immune response against bacteria and modified by different environmental and genetic factors. Recently, interest in periodontal diseases has been increasing due to the awareness that the hyperinflammatory status associated with this disorder could impose a significant increase of reactive oxygen species (ROS) relevant to numerous systemic diseases driven by a pro-oxidant profile. A highly complex interplay occurs between oxidative stress and AGEs (Advanced Glycation End products), a group of heterogeneous compounds that form constantly under physiologic conditions, although their rate of formation is markedly increased in hyperglycemia and oxidizing conditions. Starting from the most relevant hypotheses on the pathogenesis of periodontal diseases, the present review outlines its relationship with oxidative stress and inflammation response in order to make a critical evaluation of the potential role of AGEs in periodontal deterioration. Although direct evidence for the presence of AGEs in the periodontal ligament is still lacking, valuable approaches based on the use of periodontal cells along with genetic and biochemical studies in animal models and chronic periodontal patients support a potential role for protein glycation in the aetiology and severity of this disease. Following a review of the current literature, the present study highlights the need for further investigation on the presence of AGEs in the periodontal ligament as a means for the comprehension of the pathogenic mechanisms underlying periodontal diseases in order to develop prevention and treatment modalities for this dysfunction.
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Affiliation(s)
- D Pietropaoli
- Department of Health Sciences, University of L'Aquila, L'Aquila, Italy
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Jacobsen JN, Steffensen B, Häkkinen L, Krogfelt KA, Larjava HS. Skin wound healing in diabetic β6 integrin-deficient mice. APMIS 2010; 118:753-64. [PMID: 20854469 DOI: 10.1111/j.1600-0463.2010.02654.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Integrin αvβ6 is a heterodimeric cell surface receptor, which is absent from the normal epithelium, but is expressed in wound-edge keratinocytes during re-epithelialization. However, the function of the αvβ6 integrin in wound repair remains unclear. Impaired wound healing in patients with diabetes constitutes a major clinical problem worldwide and has been associated with the accumulation of advanced glycated endproducts (AGEs) in the tissues. AGEs may account for aberrant interactions between integrin receptors and their extracellular matrix ligands such as fibronectin (FN). In this study, we compared healing of experimental excisional skin wounds in wild-type (WT) and β6-knockout (β6(-/-) ) mice with streptozotocin-induced diabetes. Results showed that diabetic β6(-/-) mice had a significant delay in early wound closure rate compared with diabetic WT mice, suggesting that αvβ6 integrin may serve as a protective role in re-epithelialization of diabetic wounds. To mimic the glycosylated wound matrix, we generated a methylglyoxal (MG)-glycated variant of FN. Keratinocytes utilized αvβ6 and β1 integrins for spreading on both non-glycated and FN-MG, but their spreading was reduced on FN-MG. These findings indicated that glycation of FN and possibly other integrin ligands could hamper keratinocyte interactions with the provisional matrix proteins during re-epithelialization of diabetic wounds.
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Affiliation(s)
- Jasper N Jacobsen
- Laboratory of Periodontal Biology, Department of Oral Biological and Medical Sciences, University of British Columbia, Vancouver, BC, Canada
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Javed F, Romanos GE. Impact of Diabetes Mellitus and Glycemic Control on the Osseointegration of Dental Implants: A Systematic Literature Review. J Periodontol 2009; 80:1719-30. [DOI: 10.1902/jop.2009.090283] [Citation(s) in RCA: 215] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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