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Leptin in Dental Pulp and Periapical Tissues: A Narrative Review. Int J Mol Sci 2022; 23:ijms23041984. [PMID: 35216099 PMCID: PMC8880140 DOI: 10.3390/ijms23041984] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 02/04/2022] [Accepted: 02/07/2022] [Indexed: 12/17/2022] Open
Abstract
Leptin is a non-glycosylated 16 kDa protein synthesized mainly in adipose cells. The main function of leptin is to regulate energy homeostasis and weight control in a central manner. There is increasing evidence that leptin also has systemic effects, acting as a link between innate and acquired immune responses. The expression of leptin and its receptor in human dental pulp and periradicular tissues have already been described, as well as several stimulatory effects of leptin protein expression in dental and periodontal tissues. The aim of this paper was to review and to compile the reported scientific literature on the role and effects of leptin in the dental pulp and periapical tissues. Twelve articles accomplished the inclusion criteria, and a comprehensive narrative review was carried out. Review of the available scientific literature concluded that leptin has the following effects on pulpal and periapical physiology: 1) Stimulates odontogenic differentiation of dental pulp stem cells (DPSCs), 2) Increases the expression of dentin sialophosphoprotein (DSPP) and dentin matrix protein-1 (DMP-1), odontoblastic proteins involved in odontoblastic differentiation and dentin mineralization, 3) Stimulates vascular endothelial growth factor (VEGF) expression in human dental pulp tissue and primary cultured cells of human dental pulp (hDPCs), 4) Stimulates angiogenesis in rat dental pulp cells, and 5) Induces the expression of interleucinas 6 and 8 in human periodontal ligament cells (hPDLCs). There is evidence which suggests that leptin is implicated in the dentin mineralization process and in pulpal and periapical inflammatory and reparative responses.
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González-Navarro B, Segura-Egea JJ, Estrugo-Devesa A, Pintó-Sala X, Jane-Salas E, Jiménez-Sánchez MC, Cabanillas-Balsera D, López-López J. Relationship between Apical Periodontitis and Metabolic Syndrome and Cardiovascular Events: A Cross-Sectional Study. J Clin Med 2020; 9:jcm9103205. [PMID: 33020413 PMCID: PMC7600401 DOI: 10.3390/jcm9103205] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 09/29/2020] [Accepted: 10/02/2020] [Indexed: 12/23/2022] Open
Abstract
Aim: Both apical periodontitis (AP) and metabolic syndrome (MetS) are associated with atherosclerotic cardiovascular disease (ACVD), the main cause of cardiovascular events. The aim of this study was to investigate the prevalence of AP and the oral inflammatory burden in control subjects and patients suffering cardiovascular events, analyzing the possible association between AP and the oral inflammatory burden with MetS. Materials and Methods: Using a cross-sectional design, 83 patients suffering a cardiovascular event were recruited in the study group (SG), and 48 patients without cardiovascular events were included in the control group (CG). Periapical index (PAI) was used to diagnose AP, and total dental index (TDI) was used to assess the total oral inflammatory burden. Diagnosis of MetS was made by meeting three or more American Heart Association Scientific Statement components. Results: In the multivariate logistic regression analysis, the number of teeth with AP (OR = 2.3; 95% C.I. = 1.3–4.3; p = 0.006) and TDI scores (OR = 1.5; 95% C.I. = 1.2–1.9; p = 0.001), significantly correlated with cardiovascular events. MetS was strongly associated (OR = 18.0; 95% C.I. = 6.5–49.7; p = 0000) with cardiovascular events. Higher TDI scores were significantly associated with MetS (OR = 1.3; 95% C.I. = 1.1–1.6; p = 0.003. Neither the number of root-filled teeth (RFT) (OR = 0.9; 95% C.I. = 0.6–1.3; p = 0.61) nor the number of teeth with apical periodontitis (OR = 1.1; 95% C.I. = 0.8–1.7; p = 0.49) were associated with MetS. Conclusions: Apical periodontitis is significantly associated with cardiovascular events. Total oral inflammatory burden assessed by TDI, but not AP alone, is associated with MetS.
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Affiliation(s)
- Beatriz González-Navarro
- Department of Odontostomatolgy, School of Medicine and Health Sciences (Dentistry)—Dental Hospital, University of Barcelona, 08970 L’Hospitalet de Llobregat, Barcelona, Spain; (B.G.-N.); (A.E.-D.); (E.J.-S.)
- Oral Health and Masticatory System Group, Bellvitge Biomedical Research Institute, (IDIBELL), 08970 L’Hospitalet de Llobregat, Barcelona, Spain
| | - Juan José Segura-Egea
- Department of Stomatology, School of Dentistry, University of Sevilla, Calle Avicena s/n, 41009 Sevilla, Spain; (M.C.J.-S.); (D.C.-B.)
- Correspondence: (J.J.S.-E.); (J.L.-L.); Tel.: +34-606457362 (J.L.-L.)
| | - Albert Estrugo-Devesa
- Department of Odontostomatolgy, School of Medicine and Health Sciences (Dentistry)—Dental Hospital, University of Barcelona, 08970 L’Hospitalet de Llobregat, Barcelona, Spain; (B.G.-N.); (A.E.-D.); (E.J.-S.)
- Oral Health and Masticatory System Group, Bellvitge Biomedical Research Institute, (IDIBELL), 08970 L’Hospitalet de Llobregat, Barcelona, Spain
| | - Xavier Pintó-Sala
- Vascular Risk Unit, Department of Internal Medicine, Bellvitge University Hospital, 08970 L’Hospitalet de Llobregat, Barcelona, Spain;
| | - Enric Jane-Salas
- Department of Odontostomatolgy, School of Medicine and Health Sciences (Dentistry)—Dental Hospital, University of Barcelona, 08970 L’Hospitalet de Llobregat, Barcelona, Spain; (B.G.-N.); (A.E.-D.); (E.J.-S.)
- Oral Health and Masticatory System Group, Bellvitge Biomedical Research Institute, (IDIBELL), 08970 L’Hospitalet de Llobregat, Barcelona, Spain
| | - Mari Carmen Jiménez-Sánchez
- Department of Stomatology, School of Dentistry, University of Sevilla, Calle Avicena s/n, 41009 Sevilla, Spain; (M.C.J.-S.); (D.C.-B.)
| | - Daniel Cabanillas-Balsera
- Department of Stomatology, School of Dentistry, University of Sevilla, Calle Avicena s/n, 41009 Sevilla, Spain; (M.C.J.-S.); (D.C.-B.)
| | - José López-López
- Department of Odontostomatolgy, School of Medicine and Health Sciences (Dentistry)—Dental Hospital, University of Barcelona, 08970 L’Hospitalet de Llobregat, Barcelona, Spain; (B.G.-N.); (A.E.-D.); (E.J.-S.)
- Oral Health and Masticatory System Group, Bellvitge Biomedical Research Institute, (IDIBELL), 08970 L’Hospitalet de Llobregat, Barcelona, Spain
- Clinical Head of the Odontological Hospital University of Barcelona, University of Barcelona, 08970 L’Hospitalet de LLobregat, Barcelona, Spain
- Correspondence: (J.J.S.-E.); (J.L.-L.); Tel.: +34-606457362 (J.L.-L.)
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Wei L, Chen Y, Zhang C, Liu M, Xiong H. Leptin induces IL-6 and IL-8 expression through leptin receptor Ob-Rb in human dental pulp fibroblasts. Acta Odontol Scand 2019; 77:205-212. [PMID: 30600742 DOI: 10.1080/00016357.2018.1536280] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
OBJECTIVE Leptin, through binding to its special receptor (Ob-Rb), has potent effects on immunity and inflammation. This study aimed to investigate the expression of leptin receptor Ob-Rb in human dental pulp fibroblasts (HDPFs) and the effects of leptin on the production of proinflammatory cytokines of IL-6 and IL-8 by HDPFs. METHODS Ob-Rb expression was determined by quantitative real-time PCR (real-time PCR), Western blot and immunofluorescence analyses in cultured HDPFs. Small interfering RNA (siRNA) was transfected into HDPFs to down-regulate the expression of Ob-Rb. Real-time PCR and enzyme-linked immunosorbent assay (ELISA) were used to determine the proinflammatory cytokines of IL-6 and IL-8 levels in leptin-stimulated HDPFs. The involved signalling pathways that mediate the leptin-stimulated production of proinflammatory cytokines were investigated using Western blot and specific signalling inhibitor analyses. RESULTS The expression levels of Ob-Rb mRNA and protein were detected in HDPFs. Leptin could stimulate mRNA and protein expression of IL-6 and IL-8 in HDPFs in a concentration-dependent and time-dependent manner. Transfection with siRNA targeting Ob-Rb resulted in remarkable reduction of IL-6 and IL-8 expressions by HDPFs. In accordance with the enhanced expression of proinflammatory cytokines, leptin stimulation resulted in rapid phosphorylation of STAT3, p38 MAPK, ERK and Akt in HDPFs. Inhibiting JAK2/STAT3, p38 MAPK or PI3K/Akt substantially decreased leptin-induced IL-6 production, whereas blocking ERK and p38 MAPK substantially suppressed IL-8 production from leptin-stimulated HDPFs. CONCLUSIONS Leptin may up-regulate IL-6 and IL-8 production through binding with Ob-Rb in HDPFs via the activation of different intracellular signalling pathways.
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Affiliation(s)
- Lili Wei
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
- Department of Oral Radiology, School and Hospital of Stomatology Wuhan University, Wuhan, China
| | - Yangxi Chen
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
- Department of Oral Emergency, School and Hospital of Stomatology Wuhan University, Wuhan, China
| | - Chi Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
- Department of Oral Emergency, School and Hospital of Stomatology Wuhan University, Wuhan, China
| | - Mingwen Liu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
- Department of Oral Emergency, School and Hospital of Stomatology Wuhan University, Wuhan, China
| | - Haofei Xiong
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
- Department of Oral Emergency, School and Hospital of Stomatology Wuhan University, Wuhan, China
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Martín-González J, Pérez-Pérez A, Cabanillas-Balsera D, Vilariño-García T, Sánchez-Margalet V, Segura-Egea JJ. Leptin stimulates DMP-1 and DSPP expression in human dental pulp via MAPK 1/3 and PI3K signaling pathways. Arch Oral Biol 2018; 98:126-131. [PMID: 30476887 DOI: 10.1016/j.archoralbio.2018.11.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 10/23/2018] [Accepted: 11/19/2018] [Indexed: 01/26/2023]
Abstract
INTRODUCTION To investigate the physiological function of leptin in human dental pulp, and to determine the specific pathways implicated in its effect. METHODS Twenty-seven dental pulp samples were obtained from human third molars. Pulp samples were treated with or without human recombinant leptin. Leptin functional effect was analyzed in terms of regulation of the synthesis levels of DSPP and DMP-1, determined by immunoblot. RESULTS Leptin stimulated DMP-1 and DSPP synthesis in all human dental pulp specimens. The stimulatory effect of leptin on DMP-1 and DSPP synthesis was partially prevented by blocking mitogen-activated protein kinase (MAPK 1/3) and phosphatidylinositol 3 kinase (PI3K) pathways, respectively. CONCLUSIONS The present study demonstrates the functional effect of leptin in human dental pulp stimulating the expression of DMP-1 and DSPP, both proteins implicated in dentinogenesis. Leptin stimulates DSPP expression via PI3K pathway and DMP-1 synthesis via MAPK 1/3 pathway. These results support the role of leptin in pulpal reparative response, opening a new research line that could have translational application to the clinic in vital pulp therapy procedures.
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Affiliation(s)
- Jenifer Martín-González
- Department of Stomatology (Endodontics section), School of Dentistry, University of Sevilla, C/ Avicena s/n, 41009, Sevilla, Spain.
| | - Antonio Pérez-Pérez
- Department of Medical Biochemistry and Molecular Biology, and Immunology, Vírgen Macarena University Hospital, University of Sevilla, Av. Dr. Fedriani 3, 41071, Sevilla, Spain
| | - Daniel Cabanillas-Balsera
- Department of Stomatology (Endodontics section), School of Dentistry, University of Sevilla, C/ Avicena s/n, 41009, Sevilla, Spain
| | - Teresa Vilariño-García
- Department of Medical Biochemistry and Molecular Biology, and Immunology, Vírgen Macarena University Hospital, University of Sevilla, Av. Dr. Fedriani 3, 41071, Sevilla, Spain
| | - Victor Sánchez-Margalet
- Department of Medical Biochemistry and Molecular Biology, and Immunology, Vírgen Macarena University Hospital, University of Sevilla, Av. Dr. Fedriani 3, 41071, Sevilla, Spain
| | - Juan José Segura-Egea
- Department of Stomatology (Endodontics section), School of Dentistry, University of Sevilla, C/ Avicena s/n, 41009, Sevilla, Spain.
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Ngo VA, Jung JY, Koh JT, Oh WM, Hwang YC, Lee BN. Leptin Induces Odontogenic Differentiation and Angiogenesis in Human Dental Pulp Cells via Activation of the Mitogen-activated Protein Kinase Signaling Pathway. J Endod 2018; 44:585-591. [PMID: 29397219 DOI: 10.1016/j.joen.2017.11.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 09/15/2017] [Accepted: 11/20/2017] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Up-regulation of odontogenic differentiation, dentin formation, and angiogenesis in dental pulp are key factors in vital pulp therapy. The aim of this study was to investigate whether leptin could promote odontogenic differentiation and angiogenesis in human dental pulp cells (hDPCs). In addition, the involvement of the intracellular signaling pathway in these effects was determined. METHODS The viability of hDPCs treated with leptin was examined using the water soluble tetrazolium salt-1 assay. Real-time polymerase chain reaction was performed to determine messenger RNA (mRNA) expression levels of odontogenic and angiogenic markers. Western blot analysis was used to measure odontogenic and angiogenic protein expression levels and assess mitogen-activated protein kinase (MAPK) pathway involvement. Alkaline phosphatase (ALP) and alizarin red staining were used to evaluate expression levels of ALP and calcified nodule formation after treatment with leptin and/or the presence of MAPK inhibitors. RESULTS All concentrations of leptin used in this study did not significantly affect the viability of hDPCs. However, mRNA and protein levels of odontogenic and angiogenic markers, ALP activity, and calcified nodule formation were significantly increased in the leptin-treated group compared with those in the control group. Leptin enhanced phosphorylation of extracellular signal-related kinases, c-Jun N-terminal kinase, and p38 mitogen-activated protein kinases within 5 minutes after treatment. However, leptin-induced dentin sialophosphoprotein and vascular endothelial growth factor protein expression and mineralization were appreciably blocked by the presence of MAPK inhibitors. CONCLUSIONS Leptin can induce angiogenesis, odontogenic differentiation, and mineralization in hDPCs via activating the MAPK signaling pathway.
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Affiliation(s)
- Viet Anh Ngo
- Department of Conservative Dentistry, School of Dentistry, Dental Science Research Institute, Gwangju, Korea
| | - Ji-Yeon Jung
- Department of Physiology, School of Dentistry, Dental Science Research Institute, Gwangju, Korea
| | - Jeong-Tae Koh
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Dental Science Research Institute, Gwangju, Korea; Research Center for Biomineralization Disorders, Chonnam National University, Gwangju, Korea
| | - Won-Mann Oh
- Department of Conservative Dentistry, School of Dentistry, Dental Science Research Institute, Gwangju, Korea
| | - Yun-Chan Hwang
- Department of Conservative Dentistry, School of Dentistry, Dental Science Research Institute, Gwangju, Korea; Research Center for Biomineralization Disorders, Chonnam National University, Gwangju, Korea.
| | - Bin-Na Lee
- Department of Conservative Dentistry, School of Dentistry, Dental Science Research Institute, Gwangju, Korea.
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Pérez-Pérez A, Vilariño-García T, Fernández-Riejos P, Martín-González J, Segura-Egea JJ, Sánchez-Margalet V. Role of leptin as a link between metabolism and the immune system. Cytokine Growth Factor Rev 2017; 35:71-84. [PMID: 28285098 DOI: 10.1016/j.cytogfr.2017.03.001] [Citation(s) in RCA: 173] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 03/01/2017] [Accepted: 03/02/2017] [Indexed: 12/24/2022]
Abstract
Leptin is an adipocyte-derived hormone not only with an important role in the central control of energy metabolism, but also with many pleiotropic effects in different physiological systems. One of these peripheral functions of leptin is a regulatory role in the interplay between energy metabolism and the immune system, being a cornerstone of the new field of immunometabolism. Leptin receptor is expressed throughout the immune system and the regulatory effects of leptin include cells from both the innate and adaptive immune system. Leptin is one of the adipokines responsible for the inflammatory state found in obesity that predisposes not only to type 2 diabetes, metabolic syndrome and cardiovascular disease, but also to autoimmune and allergic diseases. Leptin is an important mediator of the immunosuppressive state in undernutrition status. Placenta is the second source of leptin and it may play a role in the immunomodulation during pregnancy. Finally, recent work has pointed to the participation of leptin and leptin receptor in the pathophysiology of inflammation in oral biology. Therefore, leptin and leptin receptor should be considered for investigation as a marker of inflammation and immune activation in the frontier of innate-adaptive system, and as possible targets for intervention in the immunometabolic mediated pathophysiology.
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Affiliation(s)
- Antonio Pérez-Pérez
- Department of Medical Biochemistry and Molecular Biology and Immunology, Medical School and Department of Clinical Biochemistry, Virgen Macarena University Hospital, University of Seville, Spain
| | - Teresa Vilariño-García
- Department of Medical Biochemistry and Molecular Biology and Immunology, Medical School and Department of Clinical Biochemistry, Virgen Macarena University Hospital, University of Seville, Spain
| | - Patricia Fernández-Riejos
- Department of Medical Biochemistry and Molecular Biology and Immunology, Medical School and Department of Clinical Biochemistry, Virgen Macarena University Hospital, University of Seville, Spain
| | - Jenifer Martín-González
- Department of Stomatology (Endodontics Section), School of Dentistry, University of Seville, Seville, Spain
| | - Juan José Segura-Egea
- Department of Stomatology (Endodontics Section), School of Dentistry, University of Seville, Seville, Spain
| | - Víctor Sánchez-Margalet
- Department of Medical Biochemistry and Molecular Biology and Immunology, Medical School and Department of Clinical Biochemistry, Virgen Macarena University Hospital, University of Seville, Spain.
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Regenerative Endodontic Procedures: A Perspective from Stem Cell Niche Biology. J Endod 2017; 43:52-62. [DOI: 10.1016/j.joen.2016.09.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 08/19/2016] [Accepted: 09/09/2016] [Indexed: 12/14/2022]
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Martín-González J, Carmona-Fernández A, Pérez-Pérez A, Sánchez-Jiménez F, Sánchez-Margalet V, Segura-Egea JJ. Expression and immunohistochemical localization of leptin in human periapical granulomas. Med Oral Patol Oral Cir Bucal 2015; 20:e334-9. [PMID: 25662559 PMCID: PMC4464921 DOI: 10.4317/medoral.20385] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2014] [Accepted: 11/21/2014] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Leptin, initially described as an adipocyte-derived hormone to regulate weight control, is expressed in normal and inflamed human dental pulp, being up-regulated during pulp experimental inflammation. Leptin receptor (LER) has been identified in human periapical granulomas. The aim of this study was to analyze and characterize the expression of leptin in human periapical granulomas. MATERIAL AND METHODS Fifteen periapical inflammatory lesions were obtained from extracted human teeth and teeth which underwent periapical surgery. After their morphological categorization as periapical granulomas and gradation of the inflammatory infiltrate, they were examined by immunohistochemistry using human leptin policlonal antibodies. Leptin mRNA expression was also determined by quantitative real-time PCR (qRT-PCR) and the amount of leptin protein was analyzed by immunoblot. RESULTS All periapical lesions exhibited the characteristic of chronic granulomatous inflammatory process with inflammatory infiltrate grade III. Leptin+ cells were detected in 13 periapical granulomas (86.6%). The median number of Leptin+ cells in periapical granulomas was 1.70 (0.00-7.4). Amongst the inflammatory cells in the periapical granulomas, only macrophages were reactive to leptin antibodies. Western blot analysis revealed the presence in all samples of a protein with apparent molecular weight of approximately 16 kDa, corresponding to the estimated molecular weights of leptin. The expression of leptin mRNA was confirmed by qRT-PCR analysis and the size of the amplified fragment (296 bp for leptin and 194 bp for cyclophilin) was assessed by agarose gel electrophoresis. CONCLUSIONS For the first time, it has been demonstrated that human periapical granuloma expresses the adipokine leptin.
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Martín-González J, Pérez-Pérez A, Sánchez-Jiménez F, Díaz-Parrado EM, de Miguel M, Sánchez-Margalet V, Segura-Egea JJ. Leptin promotes dentin sialophosphoprotein expression in human dental pulp. J Endod 2015; 41:487-92. [PMID: 25583546 DOI: 10.1016/j.joen.2014.11.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Revised: 11/24/2014] [Accepted: 11/28/2014] [Indexed: 01/09/2023]
Abstract
INTRODUCTION Leptin, an inflammation-related adipokine, and its receptor (LEPR) are expressed in human dental pulp. Dentin sialophosphoprotein (DSPP) is involved in dentinogenesis and the dental pulp reparative response. The cell type expressing LEPR in dental human pulp and the resultant effect of the binding of leptin to LEPR remain unknown. This study describes the immmunohistochemical localization of LEPR and the effect of leptin on DSPP expression in human dental pulp. METHODS Twenty-five dental pulp specimens were obtained from freshly extracted caries-free and restoration-free human third molars. LEPR localization was examined by immunohistochemistry using the antihuman LEPR monoclonal antibody. The effect of leptin on DSPP expression was determined by immunoblot analysis and quantitative real-time polymerase chain reaction. RESULTS Immunoreactivity for LEPR concentrated in the odontoblast layer but was not evident in the central zone of the dental pulp. Leptin dose dependently stimulated DSPP expression. Western blot analysis revealed the presence of a protein with an apparent molecular weight of ∼00 kDa, the estimated molecular weight of DSPP. The expression of DSPP messenger RNA was confirmed by quantitative real-time polymerase chain reaction, and the size of the amplified fragments (298 bp) was confirmed by agarose gel electrophoresis. CONCLUSIONS The present study shows that human dental pulp is immunoreactive for LEPR, with the immunoreactivity concentrated in the odontoblast layer, and that leptin stimulates, in a dose-dependent manner, DSPP protein and messenger RNA (mRNA) expression in human dental pulp. These findings further support the functional role of leptin in the dentin mineralization process and/or in dental pulp reparative and immune responses.
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Affiliation(s)
| | - Antonio Pérez-Pérez
- Department of Medical Biochemistry and Molecular Biology, Virgen Macarena University Hospital, Sevilla, Spain
| | - Flora Sánchez-Jiménez
- Department of Medical Biochemistry and Molecular Biology, Virgen Macarena University Hospital, Sevilla, Spain
| | | | - Manuel de Miguel
- Department of Normal and Pathologic Cytology and Histology, University of Sevilla, Sevilla, Spain
| | - Víctor Sánchez-Margalet
- Department of Medical Biochemistry and Molecular Biology, Virgen Macarena University Hospital, Sevilla, Spain.
| | - Juan José Segura-Egea
- Department of Stomatology (Endodontics Section), University of Sevilla, Sevilla, Spain.
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Polyzos SA, Mantzoros CS. Leptin in health and disease: facts and expectations at its twentieth anniversary. Metabolism 2015; 64:5-12. [PMID: 25467841 DOI: 10.1016/j.metabol.2014.10.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 10/20/2014] [Accepted: 10/20/2014] [Indexed: 02/07/2023]
Affiliation(s)
- Stergios A Polyzos
- Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Christos S Mantzoros
- Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA; Boston VA Healthcare system and Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
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Martín-González J, Carmona-Fernández A, Pérez-Pérez A, Sánchez-Jiménez F, Sánchez-Margalet V, Segura-Egea JJ. Expression and immunohistochemical localization of leptin receptor in human periapical granuloma. Int Endod J 2014; 48:611-8. [DOI: 10.1111/iej.12356] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 07/29/2014] [Indexed: 01/03/2023]
Affiliation(s)
- J. Martín-González
- Department of Stomatology (Endodontics Section); School of Dentistry; Virgen Macarena University Hospital; University of Sevilla; Sevilla Spain
| | - A. Carmona-Fernández
- Department of Medical Biochemistry and Molecular Biology; Virgen Macarena University Hospital; University of Sevilla; Sevilla Spain
| | - A. Pérez-Pérez
- Department of Medical Biochemistry and Molecular Biology; Virgen Macarena University Hospital; University of Sevilla; Sevilla Spain
| | - F. Sánchez-Jiménez
- Department of Medical Biochemistry and Molecular Biology; Virgen Macarena University Hospital; University of Sevilla; Sevilla Spain
| | - V. Sánchez-Margalet
- Department of Medical Biochemistry and Molecular Biology; Virgen Macarena University Hospital; University of Sevilla; Sevilla Spain
| | - J. J. Segura-Egea
- Department of Stomatology (Endodontics Section); School of Dentistry; Virgen Macarena University Hospital; University of Sevilla; Sevilla Spain
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