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Alencar PNB, Lima MCDF, Carvalho IF, Araújo LS, Silva PGDB, Lopes LLDA, Lemos JVM, Sousa FB. Radiographic evaluation of dental anomalies in patients with congenital Zika virus syndrome. Braz Oral Res 2021; 35:e043. [PMID: 33909865 DOI: 10.1590/1807-3107bor-2021.vol35.0043] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 12/10/2020] [Indexed: 01/01/2023] Open
Abstract
Numerous studies have reported abnormalities in the development of oral structures in congenital infections that also involve microcephaly. In this context, it is necessary to identify possible dental anomalies of shape and/or number in patients with Zika virus syndrome using radiography. The study population consisted of 35 children born with congenital ZIKV who underwent intraoral radiographic examinations for 24 consecutive months. A modified periapical technique was performed in an occlusal position for the maxilla and mandible. Categorical data were expressed as absolute and percentage frequencies and compared using Pearson's Chi-square test, with a 95% confidence interval. Of the entire sample, eight children (22.8%) had dental anomalies of shape and/or number, and four children (11.4%) presented with both anomalies, with agenesis of the upper and lower deciduous/permanent incisors and dental form modifications, such as microdontia and anomalous cusps. When we considered age and sex, there was no statistically significant difference between patients who presented with agenesis and those who presented with modifications. Children with congenital Zika virus syndrome were more likely to have dental modifications in the number and shape of their teeth, and it is essential to implement medium- to long-term monitoring to diagnose other possible alterations throughout the development of the mixed and permanent dentition, favoring their treatment.
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Affiliation(s)
- Phillipe Nogueira Barbosa Alencar
- Centro Universitário Christus - Unichristus, Postgraduate Program in Dental Sciences, Christus University Center, Fortaleza, CE, Brazil
| | - Maria Cláudia de Freitas Lima
- Centro Universitário Christus - Unichristus, Postgraduate Program in Dental Sciences, Christus University Center, Fortaleza, CE, Brazil
| | - Isabella Fernandes Carvalho
- Centro Universitário Christus - Unichristus, Postgraduate Program in Dental Sciences, Christus University Center, Fortaleza, CE, Brazil
| | - Lavina Sousa Araújo
- Centro Universitário Christus - Unichristus, Postgraduate Program in Dental Sciences, Christus University Center, Fortaleza, CE, Brazil
| | - Paulo Goberlânio de Barros Silva
- Centro Universitário Christus - Unichristus, Postgraduate Program in Dental Sciences, Christus University Center, Fortaleza, CE, Brazil
| | - Luiza Lassi de Araújo Lopes
- Centro Universitário Christus - Unichristus, Postgraduate Program in Dental Sciences, Christus University Center, Fortaleza, CE, Brazil
| | - José Vitor Mota Lemos
- Centro Universitário Christus - Unichristus, Postgraduate Program in Dental Sciences, Christus University Center, Fortaleza, CE, Brazil
| | - Fabrício Bitú Sousa
- Centro Universitário Christus - Unichristus, Postgraduate Program in Dental Sciences, Christus University Center, Fortaleza, CE, Brazil
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Imaculada de Queiroz Rodrigues M, Ohana de Lima Martins J, Silva PGDB, Carlos Ferreira Júnior AE, Quezado Lima Verde ME, Sousa FB, Lima Mota MR, Negreiros Nunes Alves AP. Tocilizumab, a Potent Interleukin-6 Receptor Inhibitor, Decreases Bone Resorption and Increases the Rate of Bacterial Infection After Tooth Extraction in Rats. J Oral Maxillofac Surg 2020; 78:2138-2146. [PMID: 32919953 PMCID: PMC7428756 DOI: 10.1016/j.joms.2020.08.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/11/2020] [Accepted: 08/11/2020] [Indexed: 12/11/2022]
Abstract
PURPOSE Our objective was to evaluate the influence of pretreatment with tocilizumab (TCZ) in bone healing after tooth extraction in rats. METHODS Wistar male rats were equally divided into sham (ie, nonoperated), saline (both treated with 0.1 ml/kg saline), and six TCZ groups treated with 1, 2, 4, 8, 16, and 32 mg/kg TCZ (TCZ1 to TCZ32, respectively). Twenty-four hours after administration of vehicle or TCZ, exodontia of the first lower left molar was performed, and the animals were euthanized three days later for hematological analysis and organ (liver, spleen, and kidney mass indexes, and histological evaluation), gingiva (myeloperoxidase [MPO] assay), and mandible (radiographic, histomorphometric analysis, and IL-6 immunostaining) evaluation. Analysis of variance/Bonferroni test (statistical significance, P < .05) was performed using GraphPad Prism version 5.0 (GraphPad Inc, San Diego, CA, USA). RESULTS There was no difference in radiographic results; however, leukopenia (P = .039) and neutropenia (P < .001) were statistically significant in the TCZ16 and TCZ32 groups. Weight loss (P < .001) and reduced liver index (P = .001) were significantly dose-dependent; however, no histological alterations were observed in the other organs. Osteoclast counts were reduced in groups TCZ4 to TCZ32 (P < .001), and IL-6 immunostaining increased in the TCZ8 to TCZ32 groups (P < .001). Alveolar infection rates increased in groups TCZ4 to TCZ32 (P < .001), and MPO had a biphasic response, exhibiting a reduction in groups TCZ2 and TCZ4, and an increase in group TCZ32 (P = .004). CONCLUSION TCZ-induced immunosuppression led to a reduction in osteoclast function, an increase in alveolar infection, and compensatory neutrophil infiltration.
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Affiliation(s)
| | | | - Paulo Goberlânio de Barros Silva
- Professor, Laboratory of Bucodental Pathology, Federal University of Ceará, Fortaleza, Ceará, Brazil; Professor, Unichristus, Department of Dentistry, Fortaleza, Ceará, Brazil.
| | | | - Maria Elisa Quezado Lima Verde
- PhD Student, Laboratory of Bucodental Pathology, Federal University of Ceará, Fortaleza, Ceará, Brazil; PhD Student, Unichristus, Department of Dentistry, Fortaleza, Ceará, Brazil
| | - Fabrício Bitú Sousa
- Professor, Laboratory of Bucodental Pathology, Federal University of Ceará, Fortaleza, Ceará, Brazil; Professor, Unichristus, Department of Dentistry, Fortaleza, Ceará, Brazil
| | - Mário Rogério Lima Mota
- Professor, Laboratory of Bucodental Pathology, Federal University of Ceará, Fortaleza, Ceará, Brazil
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Carvalho IF, Alencar PNB, Carvalho de Andrade MD, Silva PGDB, Carvalho EDF, Araújo LS, Cavalcante MPM, Sousa FB. Clinical and x-ray oral evaluation in patients with congenital Zika Virus. J Appl Oral Sci 2019; 27:e20180276. [PMID: 31116278 PMCID: PMC6534372 DOI: 10.1590/1678-7757-2018-0276] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 09/17/2018] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVE The aim of this study was to investigate possible malformations in the soft, bone and/or dental tissues in patients with congenital Zika Virus (ZIKV) by clinical and x-ray evaluation. METHODOLOGY Thirty children born with ZIKV and 30 children born without ZIKV (control group) were included in the study. Patients were evaluated over 24 consecutive months according to the variables: sex, age, cleft palates, soft tissue lesions, alveolar ridge hyperplasia, short labial and lingual frenums, inadequate posture of the lingual and perioral muscles at rest, micrognathia, narrow palatine vaults, changes in the teeth shape and/or number, sequence eruption, spasms, seizures and eruption delay were evaluated. Chi-square test, Student's t-test and nominal logistic regression were used (p<0.05). RESULTS Among the 30 babies examined, the mean age of the first dental eruption was 10.8±3.8 with almost two-thirds of the children (n=18, 60%) experiencing eruptions of their first tooth after 9 months of age, nine children (30%) had inadequate lingual posture at rest, more than half of the children (n=18, 60%) had short labial or lingual frenums. ZIKV babies showed a high prevalence of clef palate (p<0.001), inadequate lingual posture at rest (p=0.004), micrognathia (p=0.002), changes in the shape and/or number of teeth (p=0.006), alteration in sequence of dental eruption (p<0.001) and muscles spasms (p=0.002). The delay eruption was associated with inadequate lingual posture at rest (p=0.047), micrognathia (p=0.002) and changes in the shape and/or number of teeth (p=0.021). The delayed eruption (p=0.006) and narrow palatine vaults (p=0.008) were independently associated with ZIKV. Moreover, female patients showed the most narrow palatine vaults (p=0.010). CONCLUSIONS The children with ZIKV showed a greater tendency to have delayed eruption of the first deciduous tooth, inadequate lingual posture and short labial and lingual frenums.
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Affiliation(s)
| | | | | | | | | | - Lavina Sousa Araújo
- Centro Universitário Christus, Departamento de Odontologia, Fortaleza, Ceará, Brasil
| | | | - Fabrício Bitú Sousa
- Centro Universitário Christus, Departamento de Odontologia, Fortaleza, Ceará, Brasil
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de Barros Silva PG, Ferreira Junior AEC, de Oliveira CC, Brizeno LAC, Wong DVT, Lima Júnior RCP, Sousa FB, Mota MRL, Alves APNN. Chronic treatment with zoledronic acid increases inflammatory markers in periodontium of rats. J Oral Pathol Med 2017; 46:1046-1053. [PMID: 28865081 DOI: 10.1111/jop.12640] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/29/2017] [Indexed: 11/30/2022]
Abstract
BACKGROUND Bisphosphonates (BF) rise proinflammatory markers and irreversibly bind to bone. Chronically, BF can lead to an inflammatory status and can increase the local oxidative stress in periodontium. Therefore, the objective of this study was to evaluate whether the chronic infusion of Zoledronic Acid (ZA) increases inflammatory markers in periodontium of rats. METHODS AND RESULTS Chronically, infusion therapy was performed with ZA (0.04, 0.2 or 1 mg/kg or saline) by four doses in over a 70-day period to analyze periodontium of the first right inferior molar using histologic, histochemical (toluidine blue), and immunohistochemical (CD68, tumor necrosis factor-α (TNF-α), interleukin-1beta (IL-1β), inducible nitric oxide synthase (iNOS) and nuclear factor kappa B (NF-kB)) tests. The experiment was replicated (ZA 0.2 mg/kg versus saline) for myeloperoxidase (MPO) assay and dose TNF-α, IL-1β, malondialdehyde (MDA) and glutathione (GSH) in gingiva of the same tooth. Despite there is no alteration in mast cells (P = .608) and CD68 mononuclear-positive cells (P = .351), in the periodontium of the ZA-treated group, was observed an increase in the presence of inflammatory cells (P = .001) and cytoplasmic immunostaining for TNF-α (P = .003), IL-1b (P = .004), iNOS (P = .008), and NF-kB (P = .025). Levels of MPO (P < .001), TNF-α (P = .002), IL-1β (P < .001), and GSH (P = .005) were augmented in gingiva of ZA-treated group but MDA (P = .993) levels and NF-kB nuclear staining (P = .923) were not altered. CONCLUSIONS Chronic treatment with ZA increase proinflammatory cytokines and the number of inflammatory cells in periodontium of rats and GSH are expressed probably in a compensatory manner.
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Affiliation(s)
- Paulo Goberlânio de Barros Silva
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceará, Fortaleza, Brazil.,Department of Dental Clinic, Unichristus, Fortaleza, Brazil
| | | | - Camila Carvalho de Oliveira
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceará, Fortaleza, Brazil
| | | | - Deysi Viviana Tenazoa Wong
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceara, Fortaleza, Brazil
| | | | - Fabrício Bitú Sousa
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceará, Fortaleza, Brazil.,Department of Dental Clinic, Unichristus, Fortaleza, Brazil
| | - Mário Rogério Lima Mota
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceará, Fortaleza, Brazil
| | - Ana Paula Negreiros Nunes Alves
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceará, Fortaleza, Brazil
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Rocha JCB, Silva EF, Oliveira MF, Sousa FB, Teixeira AVNC, Rocha MS. β-Cyclodextrin polymer binding to DNA: Modulating the physicochemical parameters. Phys Rev E 2017; 95:052416. [PMID: 28618573 DOI: 10.1103/physreve.95.052416] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Indexed: 11/07/2022]
Abstract
Cyclodextrins and cyclodextrins-modified molecules have interesting and appealing properties due to their capacity to host components that are normally insoluble or poorly soluble in water. In this work, we investigate the interaction of a β-cyclodextrin polymer (poly-β-CD) with λ-DNA. The polymers are obtained by the reaction of β-CD with epichlorohydrin in alkaline conditions. We have used optical tweezers to characterize the changes of the mechanical properties of DNA molecules by increasing the concentration of poly-β-CD in the sample. The physical chemistry of the interaction is then deduced from these measurements by using a recently developed quenched-disorder statistical model. It is shown that the contour length of the DNA does not change in the whole range of poly-β-CD concentration (<300μM). On the other hand, significant alterations were observed in the persistence length that identifies two binding modes corresponding to the clustering of ∼2.6 and ∼14 polymer molecules along the DNA double helix, depending on the polymer concentration. Comparing these results with the ones obtained for monomeric β-CD, it was observed that the concentration of CD that alters the DNA persistence length is considerably smaller when in the polymeric form. Also, the binding constant of the polymer-DNA interaction is three orders of magnitude higher than the one found for native (monomeric) β-CD. These results show that the polymerization of the β-CD strongly increases its binding affinity to the DNA molecule. This property can be wisely used to modulate the binding of cyclodextrins to the DNA double helix.
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Affiliation(s)
- J C B Rocha
- Departamento de Física, Universidade Federal de Viçosa, 36570-900 Viçosa, MG, Brazil.,Instituto Federal do Norte de Minas Gerais-Campus Avançado Janaúba, 39440-000 Janaúba, MG, Brazil
| | - E F Silva
- Departamento de Física, Universidade Federal de Viçosa, 36570-900 Viçosa, MG, Brazil
| | - M F Oliveira
- Departamento de Química, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
| | - F B Sousa
- Instituto de Física e Química, Universidade Federal de Itajubá, 37500-903 Itajubá, MG, Brazil
| | - A V N C Teixeira
- Departamento de Física, Universidade Federal de Viçosa, 36570-900 Viçosa, MG, Brazil
| | - M S Rocha
- Departamento de Física, Universidade Federal de Viçosa, 36570-900 Viçosa, MG, Brazil
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Chaves FN, Bezerra TMM, de Barros Silva PG, Oliveira FAF, Sousa FB, Costa FWG, Alves APNN, Pereira KMA. Evaluation of the p-AKT, p-JNK and FoxO3a function in oral epithelial dysplasia. Oral Dis 2017; 23:367-378. [DOI: 10.1111/odi.12623] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 11/06/2016] [Accepted: 12/02/2016] [Indexed: 12/27/2022]
Affiliation(s)
- FN Chaves
- School of Dentistry; Federal University of Ceara/Sobral; Sobral Ceara Brazil
| | - TMM Bezerra
- Division of Oral Pathology; Department of Dental Clinic; Faculty of Pharmacy, Dentistry and Nursing; Federal University of Ceara; Fortaleza Ceara Brazil
| | - PG de Barros Silva
- Division of Oral Pathology; Department of Dental Clinic; Faculty of Pharmacy, Dentistry and Nursing; Federal University of Ceara; Fortaleza Ceara Brazil
| | - FAF Oliveira
- Division of Oral Pathology; Department of Dental Clinic; Faculty of Pharmacy, Dentistry and Nursing; Federal University of Ceara; Fortaleza Ceara Brazil
| | - FB Sousa
- Division of Oral Pathology; Department of Dental Clinic; Faculty of Pharmacy, Dentistry and Nursing; Federal University of Ceara; Fortaleza Ceara Brazil
| | - FWG Costa
- Division of Oral Pathology; Department of Dental Clinic; Faculty of Pharmacy, Dentistry and Nursing; Federal University of Ceara; Fortaleza Ceara Brazil
| | - APNN Alves
- Division of Oral Pathology; Department of Dental Clinic; Faculty of Pharmacy, Dentistry and Nursing; Federal University of Ceara; Fortaleza Ceara Brazil
| | - KMA Pereira
- School of Dentistry; Federal University of Ceara/Sobral; Sobral Ceara Brazil
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de Barros Silva PG, Verde MEQL, Brizeno LAC, Wong DVT, Lima Júnior RCP, Sousa FB, Mota MRL, Alves APNN. Immune cell profile of dental pulp tissue treated with zoledronic acid. Int Endod J 2017; 50:1067-1076. [PMID: 27977859 DOI: 10.1111/iej.12734] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 12/07/2016] [Indexed: 02/02/2023]
Abstract
AIM To characterize the pulp immune cell profile in the teeth of rats treated with zoledronic acid (ZA). METHODOLOGY Male Wistar rats (n = 6 per group) received four intravenous infusions of ZA at doses of 0.04, 0.20 or 1.00 mg kg-1 ZA or saline (control). On the 70th experimental day, they were euthanized. The first right molar was examined microscopically and submitted to toluidine blue reaction and immunohistochemical for CD68, tumour necrosis Factor (TNF)-α, interleukin (IL)-1β, inducible nitric oxide synthase (iNOS), nuclear factor kappa B (NF-kB) and IL-18 binding protein (IL-18 bp). The presence of ectasic/dilated vessels and inflammatory cells was analysed, and mast cells and mononuclear CD68-positive cells were counted along with the intensity of immunostaining (0-3) for inflammatory markers in odontoblasts and nonodontoblasts pulp cells. The Kruskal-Wallis/Dunn's test (scores or quantitative data) and the chi-squared test (categorical data) were used (GraphPad Prism 5.0, P < 0.05). RESULTS There was no differences in the number of animals exhibiting dilated/ectasic blood vessels (P = 0.242) and inflammatory cells (P = 0.489) or in the number of mast cells (P = 1.000). However, there was an increase in mononuclear CD68-positive cells (P = 0.026), immunostaining of TNF-α (P = 0.020), IL-1β (P = 0.027) and iNOS (P = 0.001) in odontoblasts, and IL-1β (P = 0.013) in nonodontoblast pulp cells dose-dependently. NFkB (nucleus and cytoplasm) and IL-18 bp did not differ between groups. CONCLUSION ZA modified the immune cell profile in the dental pulp, increasing the number of macrophages and expression of pro-inflammatory markers independent of NFkB.
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Affiliation(s)
- P G de Barros Silva
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - M E Q L Verde
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - L A C Brizeno
- Department of Biotechnology, Faculty of Biotechnology, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - D V T Wong
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - R C P Lima Júnior
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - F B Sousa
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - M R L Mota
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - A P N N Alves
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
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de Barros Silva PG, de Oliveira CC, Brizeno L, Wong D, Lima Júnior R, Gonçalves RP, Sousa FB, Mota M, de Albuquerque Ribeiro R, Alves A. Immune cellular profile of bisphosphonate-related osteonecrosis of the jaw. Oral Dis 2016; 22:649-57. [PMID: 27232600 DOI: 10.1111/odi.12513] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 04/09/2016] [Accepted: 05/02/2016] [Indexed: 01/19/2023]
Abstract
OBJECTIVES Characterize the cell profile and immunostaining of proinflammatory markers in an experimental model of bisphosphonate-related osteonecrosis of the jaw (BRONJ). MATERIALS AND METHODS Male Wistar rats (n = 6-7) were treated chronically with saline solution or zoledronic acid (ZA) at 0.04, 0.20, and 1.00 mg kg(-1) (1.4 × 10(-7) , 6.9 × 10(-6) , and 3.4 × 10(-5) mol kg(-1) ), and subsequently, the first left inferior molar was extracted. Were performed counting of viable and empty osteocyte lacunae, viable and apoptotic osteoclasts, polymorphonuclear neutrophil, mast cells (toluidine blue), and the positive presence cells for CD68, tumor necrosis factor-alpha (TNF-α), IL (interleukin)-1β, inducible nitric oxide synthase (iNOS), nuclear factor-kappa B (NF-kB) and IL-18 binding protein (IL-18 bp). RESULTS BRONJ was showed in ZA treated with 0.20 and 1.00 mg kg(-1) . There is a dose dependent increase in percentage of empty osteocyte lacunae (P < 0.001) and apoptotic osteoclasts (P < 0.001), counting of total osteoclasts (P = 0.003), polymorphonuclear neutrophil cells (P = 0.009), cytoplasmic-positive cells of CD68 (P < 0.001), TNF-α (P = 0.001), IL-1β (P = 0.001), iNOS (P < 0.001), NF-kB (P = 0.006), and nuclear-positive cells of NF-kB (P = 0.011). Consequently, there is no difference in mast cells (P = 0.957), and IL-18 bp immunostaining decreases dose dependently (P = 0.005). CONCLUSIONS BRONJ is characterized by increases in immunostaining for proinflammatory markers and NF-kB and inversely associated with cells exhibiting IL-18 bp.
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Affiliation(s)
- P G de Barros Silva
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil.
| | - C C de Oliveira
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Lac Brizeno
- Department of Biotechnology, Faculty of Biotechnology, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Dvt Wong
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Rcp Lima Júnior
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - R P Gonçalves
- Department of Clinical Analysis, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - F B Sousa
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Mrl Mota
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - R de Albuquerque Ribeiro
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Apnn Alves
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
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Oliveira BV, Barros Silva PG, Nojosa JDS, Brizeno LAC, Ferreira JM, Sousa FB, Mota MRL, Alves APNN. TNF-alpha expression, evaluation of collagen, and TUNEL of Matricaria recutita L. extract and triamcinolone on oral ulcer in diabetic rats. J Appl Oral Sci 2016; 24:278-90. [PMID: 27383710 PMCID: PMC5022216 DOI: 10.1590/1678-775720150481] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 03/05/2016] [Accepted: 03/15/2016] [Indexed: 01/07/2023] Open
Abstract
OBJECTIVE to evaluate the influence of Tumor Necrosis Factor alpha (TNF-α) and apoptosis in rats with DM treated with chamomile extract or triamcinolone. MATERIAL AND METHODS Wistar male rats (210.0±4.2 g) were divided into five groups: negative control group (NCG) without diabetes; positive control group (PCG) with DM (alloxan, 45 mg/kg); and groups treated with chamomile extract (normoglycemic= NCG group and diabetic= DCG group) and with triamcinolone (TG). Traumatic ulcers were performed on all animals that received topical triamcinolone, chamomile extract or saline 12/12 hours for ten days. RESULTS On days five and ten the animals were euthanized and the ulcers were analyzed by light microscopy, TUNEL assay, and immunohistochemically (TNF-α). The NCG (p=0.0062), PCG (p=0.0285), NCG (p=0.0041), and DCG (p<0.0001) groups were completely healed on the 10th day, however, there was no healing on the TG (p=0.5127) group. The TNF-α expression showed a significant reduction from the 5th to the 10th day in NCG (p=0.0266) and DCG (p=0.0062). In connective tissue, the TUNEL assay showed a significant reduction in the number of positive cells in NCG (p=0.0273) and CNG (p=0.0469) and in the epithelium only in CDG (p=0.0320). CONCLUSIONS Chamomile extract can optimize the healing of traumatic oral ulcers in diabetic rats through the reduction of apoptosis in the epithelium and TNF-α expression.
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Affiliation(s)
- Bruna Vasconcelos Oliveira
- - Universidade Federal do Ceará, Setor de Patologia Oral, Departamento de Odontologia Clínica, Fortaleza, CE, Brasil
| | - Paulo Goberlânio Barros Silva
- - Universidade Federal do Ceará, Setor de Patologia Oral, Departamento de Odontologia Clínica, Fortaleza, CE, Brasil
| | - Jacqueline de Santiago Nojosa
- - Universidade Federal do Ceará, Setor de Cariologia e Odontologia Restauradora, Departamento de Odontologia Restauradora, Fortaleza, CE, Brasil
| | - Luiz André Cavalcante Brizeno
- - Universidade Estadual do Ceará, Setor de Fisiologia e Farmacologia, Departamento de Ciências Biomédicas, Fortaleza, CE, Brasil
| | | | - Fabrício Bitú Sousa
- - Universidade Federal do Ceará, Setor de Patologia Oral, Departamento de Odontologia Clínica, Fortaleza, CE, Brasil
| | - Mário Rogério Lima Mota
- - Universidade Federal do Ceará, Setor de Patologia Oral, Departamento de Odontologia Clínica, Fortaleza, CE, Brasil
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Silva PGDB, Ferreira Junior AEC, Teófilo CR, Barbosa MC, Lima Júnior RCP, Sousa FB, Mota MRL, Ribeiro RDA, Alves APNN. Effect of different doses of zoledronic acid in establishing of bisphosphonate-related osteonecrosis. Arch Oral Biol 2015; 60:1237-45. [PMID: 26093347 DOI: 10.1016/j.archoralbio.2015.05.015] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Revised: 05/13/2015] [Accepted: 05/24/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVES To establish osteonecrosis of the jaws in rats treated with different doses of zoledronic acid (ZA). METHODS Male Wistar rats (n=6-7) received three consecutive weekly intravenous ZA infusions at doses of 0.04, 0.20 or 1.00mg/kg ZA or saline (control). Four weeks after the last administration, the animals were submitted to simple extraction of the lower left first molar. An additional dose of ZA was administered seven days later, and the animals were sacrificed 28 days after exodontia. Weight was measured and blood was collected weekly for analysis. The jaw was radiographically and microscopically examined along with the liver, spleen, kidney and stomach. RESULTS All ZA doses showed a higher radiolucent area than the control (p<0.0001), but the dose of 0.04mg/kg did not show BRONJ. Doses of 0.20 and 1.00mg/kg ZA showed histological evidence of bone necrosis (p=0.0004). Anaemia (p<0.0001, r(2)=0.8073) and leucocytosis (p<0.0001, r(2)=0.9699) are seen with an increase of lymphocytes (p<0.0001, r(2)=0.6431) and neutrophils and monocytes (p=0.0218, r(2)=0.8724) in all the animals treated with an increasing dose of ZA. Haemorrhage and ectasia were observed in the spleen (p=0.0004) and stomach (p=0.0168) in a dose-dependent manner, and the animals treated with ZA showed a lower rate of weight gain (p<0.0001). CONCLUSIONS We designed a bisphosphonate-related osteonecrosis of the jaw model that reproduces radiographic and histological parameters and mimics clinical alterations such as leucocytosis, anaemia and idiosyncratic inflammatory post infusion reactions.
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Affiliation(s)
- Paulo Goberlânio de Barros Silva
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil.
| | - Antonio Ernando Carlos Ferreira Junior
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Carolina Rodrigues Teófilo
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Maritza Cavalcante Barbosa
- Department of Clinical Analysis, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | | | - Fabrício Bitú Sousa
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | - Mário Rogério Lima Mota
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
| | | | - Ana Paula Negreiros Nunes Alves
- Department of Dental Clinic, Division of Oral Pathology, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, Ceara, Brazil
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11
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Abstract
The ability to infiltrate various molecules and resins into dental enamel is highly desirable in dentistry, yet transporting materials into dental enamel is limited by the nanometric scale of their pores. Materials that cannot be infiltrated into enamel by diffusion/capillarity are often considered molecules with sizes above a critical threshold, which are often considered to be larger than the pores of enamel. We challenge this notion by reporting the use of electrokinetic flow to transport solutions with molecules with sizes above a critical threshold-namely, an aqueous solution with a high refractive index (Thoulet's solution) and a curable fluid resin infiltrant (without acid etching)-deep into the normal enamel layer. Volume infiltration by Thoulet's solution is increased by 5- to 6-fold, and resin infiltration depths as large as 600 to 2,000 µm were achieved, in contrast to ~10 µm resulting from diffusion/capillarity. Incubation with demineralization solution for 192 h resulted in significant demineralization at noninfiltrated histologic points but not at resin infiltrated. These results open new avenues for the transport of materials in dental enamel.
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Affiliation(s)
- H Y Gan
- Singapore Institute of Technology, Singapore Institute of Manufacturing Technology, Singapore Department of Electrical Engineering and Computer Science / Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - F B Sousa
- Department of Morphology, Health Sciences Center, Federal University of Paraiba, Joao Pessoa, Cidade Universitaria, Paraíba, Brazil
| | - H L Carlo
- Department of Restorative Dentistry, Health Sciences Center, Federal University of Paraiba, Joao Pessoa, Cidade Universitaria, Paraíba, Brazil
| | - P P Maciel
- Department of Restorative Dentistry, Health Sciences Center, Federal University of Paraiba, Joao Pessoa, Cidade Universitaria, Paraíba, Brazil
| | - M S Macena
- Department of Morphology, Health Sciences Center, Federal University of Paraiba, Joao Pessoa, Cidade Universitaria, Paraíba, Brazil
| | - J Han
- Department of Electrical Engineering and Computer Science / Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
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Silva PGB, Cavalcante GM, Fernandes CP, Sousa FB, Mota MRL, Alves APNN. Clinic-pathological Study and Comparative Analysis of Orofacial Lesions in a Brazilian Population of Children and Adolescents. Pesqui bras odontopediatria clín integr 2014. [DOI: 10.4034/pboci.2014.142.10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Magalhaes DP, Osterne RL, Alves AP, Santos PS, Lima RB, Sousa FB. Multiple brown tumours of tertiary hyperparathyroidism in a renal transplant recipient: A case report. Med Oral Patol Oral Cir Bucal 2009. [DOI: 10.4317/medoral.15.e10] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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14
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Sousa FB, Vianna SS, Santos-Magalhães NS. A new approach for improving the birefringence analysis of dental enamel mineral content using polarizing microscopy. J Microsc 2006; 221:79-83. [PMID: 16499547 DOI: 10.1111/j.1365-2818.2006.01547.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The main problem in interpreting birefringence of dental enamel under polarizing microscopy is the lack of physical constants able to allow the Wiener equation to be applied directly to the composition of such tissue. The present study introduces a new approach to circumvent this constraint. Because the nonmineral phase of enamel is heterogeneous, its refractive index can be computed in terms of its components (namely, water, which is partially replaced by the immersion medium, and organic matter), thereby providing a more acceptable refractive index to be used in the Wiener equation. Furthermore, the enamel mineral volume is ordinarily calculated on the basis of the density 3.15 g cm(-3). The density 2.99 g cm(-3) has been, however, reported to be more accurate for enamel hydroxyapatite, so enamel mineral volumes from selected published data were converted using such a density. The birefringence of mature enamel computed by the Wiener equation, taking into account the above refinements, matched, for the first time, published experimental birefringence values. The theoretical water and organic contents were also consistent with published experimental data. Thus, a direct application of the Wiener equation to the enamel composition has now been achieved. It is speculated that quantitative data on the mineral, the water and the organic contents of mature dental enamel can be derived from interpretation of birefringence in two immersion media (obtained before and after extraction of the organic matter) with this new approach.
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Affiliation(s)
- F B Sousa
- Departamento de Morfologia, Centro de Ciências da Saude, Universidade Federal da Paraiba, Cidade Universitaria, 58051-900, Joao Pessoa, Paraiba, Brazil.
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