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Solá VM, Aguilar JJ, Farías A, Vazquez Mosquera AP, Peralta López ME, Carpentieri AR. Melatonin protects gingival mesenchymal stem cells and promotes differentiation into osteoblasts. Cell Biochem Funct 2022; 40:636-646. [PMID: 35848411 DOI: 10.1002/cbf.3733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 07/01/2022] [Accepted: 07/03/2022] [Indexed: 11/09/2022]
Abstract
Melatonin (MEL) has antioxidant properties and participates in osteogenic differentiation. In periodontitis, in which increased oxidative stress and bone resorption are involved, mesenchymal stem cells derived from the gingiva (GMSCs) combined with MEL could be relevant for osteogenic regeneration. In this study, we studied the antioxidant and differentiating effect of MEL on an in vitro system of GMSCs. Primary culture of GMSCs from Wistar rats was developed to evaluate differentiation into osteoblasts with an appropriate medium with or without MEL. Marker genes of mesenchymal stem cells by real time-polymerase chain reaction, clonogenic capacity, and cell migration after wound assay were used to characterize GMSCs as mesenchymal stem cells. Alkaline phosphatase activity and the alizarin red technique were used to evaluate osteogenic activity and differentiation. MEL increased alkaline phosphatase activity and alizarin red values, promoting osteogenic differentiation. Besides this, MEL protected GMSCs in a model of cellular damage related to oxidative stress, returning viability to baseline. MEL was more effective in promoting and protecting GMSCs by the production of osteogenic cells when oxidative stress is present. This evidence supports the use of MEL as a novel bone-regenerative therapy in periodontal diseases.
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Affiliation(s)
- Verónica M Solá
- Cátedra "B" de Química Biológica, Facultad de Odontología, Universidad Nacional de Córdoba (UNC), Córdoba, Argentina.,Instituto de Investigaciones en Ciencias de la Salud (INICSA/UNC-CONICET), Córdoba, Argentina
| | - Juan J Aguilar
- Instituto de Virología Dr. José María Vanella, Facultad de Ciencias Médicas, UNC, Córdoba, Argentina.,Cátedra "B" de Introducción a la Física y Química Biológica, Facultad de Odontología, UNC, Córdoba, Argentina
| | - Adrián Farías
- Instituto de Virología Dr. José María Vanella, Facultad de Ciencias Médicas, UNC, Córdoba, Argentina
| | - Ana P Vazquez Mosquera
- Cátedra "B" de Química Biológica, Facultad de Odontología, Universidad Nacional de Córdoba (UNC), Córdoba, Argentina.,Instituto de Investigaciones en Ciencias de la Salud (INICSA/UNC-CONICET), Córdoba, Argentina.,Cátedra "B" de Introducción a la Física y Química Biológica, Facultad de Odontología, UNC, Córdoba, Argentina
| | - María E Peralta López
- Cátedra "B" de Química Biológica, Facultad de Odontología, Universidad Nacional de Córdoba (UNC), Córdoba, Argentina
| | - Agata R Carpentieri
- Cátedra "B" de Química Biológica, Facultad de Odontología, Universidad Nacional de Córdoba (UNC), Córdoba, Argentina.,Instituto de Investigaciones en Ciencias de la Salud (INICSA/UNC-CONICET), Córdoba, Argentina
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Owens YA, DeStaffany AM, Crow ME, Johnson LR, Tilliss TS, Johnson RL, McNair BK. Examining the Case for Dental Hygienists' Teaching Predoctoral Dental Students: A Two-Part Study. J Dent Educ 2019; 83:1427-1435. [PMID: 31406006 DOI: 10.21815/jde.019.141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 06/30/2019] [Indexed: 11/20/2022]
Abstract
Dental students in North American dental schools are exposed to faculty members with various professional backgrounds. These faculty members may include dentists, dental hygienists, and scientists without clinical dental credentials. The practice of dental hygienists' educating predoctoral dental students has not been well documented. The aims of this two-part study were to investigate the parameters of didactic, preclinical, and clinical instruction of dental students by dental hygienist faculty members in North American dental schools and to explore dental students' perceptions of this form of teaching. In part one, a survey was sent electronically to the clinical or academic affairs deans of all 76 American Dental Education Association (ADEA) member dental schools in 2017. Twenty-nine responded, for a 38.2% response rate. In 76% of the responding schools, dental hygienists were teaching dental students. Most respondents reported that, in their schools, the minimum degree required to teach didactically was a master's, while a bachelor's degree was required for preclinical and clinical courses. There was no significant association between dental hygienists' instructing dental students and having a dental hygiene educational program at the institution. In part two of the study, a questionnaire was completed by 102 graduating dental students (85% response rate) at one U.S. university to evaluate the impact of dental hygienist educators. Among the respondents, 87% reported feeling that dental hygienists were very effective educators. There were no significant differences in responses between traditional and advanced standing international dental students. This study found that dental hygienists were educating dental students in many North American dental schools and were doing so in curricular content beyond periodontics and that their educational contributions at a sample school were valued by the dental students there.
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Affiliation(s)
- Yanira A Owens
- Yanira A. Owens, RDH, BS, MHA, is Clinical Instructor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Amy M. DeStaffany, RDH, BS, is Assistant Professor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Meghan E. Crow, RDH, BS, is Clinical Instructor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Lonnie R. Johnson, DDS, PhD, is Professor, Department of Surgical Dentistry and Senior Associate Dean for Clinics and Professional Practice, University of Colorado School of Dental Medicine; Terri S. Tilliss, RDH, PhD, is Professor, Department of Orthodontics, University of Colorado School of Dental Medicine; Rachel L. Johnson, BA, MS, is in the Department of Biostatistics and Analysis, University of Colorado Anschutz Medical Campus; and Bryan K. McNair, MS, is in the Department of Biostatistics and Analysis, University of Colorado Anschutz Medical Campus
| | - Amy M DeStaffany
- Yanira A. Owens, RDH, BS, MHA, is Clinical Instructor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Amy M. DeStaffany, RDH, BS, is Assistant Professor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Meghan E. Crow, RDH, BS, is Clinical Instructor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Lonnie R. Johnson, DDS, PhD, is Professor, Department of Surgical Dentistry and Senior Associate Dean for Clinics and Professional Practice, University of Colorado School of Dental Medicine; Terri S. Tilliss, RDH, PhD, is Professor, Department of Orthodontics, University of Colorado School of Dental Medicine; Rachel L. Johnson, BA, MS, is in the Department of Biostatistics and Analysis, University of Colorado Anschutz Medical Campus; and Bryan K. McNair, MS, is in the Department of Biostatistics and Analysis, University of Colorado Anschutz Medical Campus.
| | - Meghan E Crow
- Yanira A. Owens, RDH, BS, MHA, is Clinical Instructor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Amy M. DeStaffany, RDH, BS, is Assistant Professor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Meghan E. Crow, RDH, BS, is Clinical Instructor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Lonnie R. Johnson, DDS, PhD, is Professor, Department of Surgical Dentistry and Senior Associate Dean for Clinics and Professional Practice, University of Colorado School of Dental Medicine; Terri S. Tilliss, RDH, PhD, is Professor, Department of Orthodontics, University of Colorado School of Dental Medicine; Rachel L. Johnson, BA, MS, is in the Department of Biostatistics and Analysis, University of Colorado Anschutz Medical Campus; and Bryan K. McNair, MS, is in the Department of Biostatistics and Analysis, University of Colorado Anschutz Medical Campus
| | - Lonnie R Johnson
- Yanira A. Owens, RDH, BS, MHA, is Clinical Instructor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Amy M. DeStaffany, RDH, BS, is Assistant Professor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Meghan E. Crow, RDH, BS, is Clinical Instructor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Lonnie R. Johnson, DDS, PhD, is Professor, Department of Surgical Dentistry and Senior Associate Dean for Clinics and Professional Practice, University of Colorado School of Dental Medicine; Terri S. Tilliss, RDH, PhD, is Professor, Department of Orthodontics, University of Colorado School of Dental Medicine; Rachel L. Johnson, BA, MS, is in the Department of Biostatistics and Analysis, University of Colorado Anschutz Medical Campus; and Bryan K. McNair, MS, is in the Department of Biostatistics and Analysis, University of Colorado Anschutz Medical Campus
| | - Terri S Tilliss
- Yanira A. Owens, RDH, BS, MHA, is Clinical Instructor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Amy M. DeStaffany, RDH, BS, is Assistant Professor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Meghan E. Crow, RDH, BS, is Clinical Instructor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Lonnie R. Johnson, DDS, PhD, is Professor, Department of Surgical Dentistry and Senior Associate Dean for Clinics and Professional Practice, University of Colorado School of Dental Medicine; Terri S. Tilliss, RDH, PhD, is Professor, Department of Orthodontics, University of Colorado School of Dental Medicine; Rachel L. Johnson, BA, MS, is in the Department of Biostatistics and Analysis, University of Colorado Anschutz Medical Campus; and Bryan K. McNair, MS, is in the Department of Biostatistics and Analysis, University of Colorado Anschutz Medical Campus
| | - Rachel L Johnson
- Yanira A. Owens, RDH, BS, MHA, is Clinical Instructor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Amy M. DeStaffany, RDH, BS, is Assistant Professor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Meghan E. Crow, RDH, BS, is Clinical Instructor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Lonnie R. Johnson, DDS, PhD, is Professor, Department of Surgical Dentistry and Senior Associate Dean for Clinics and Professional Practice, University of Colorado School of Dental Medicine; Terri S. Tilliss, RDH, PhD, is Professor, Department of Orthodontics, University of Colorado School of Dental Medicine; Rachel L. Johnson, BA, MS, is in the Department of Biostatistics and Analysis, University of Colorado Anschutz Medical Campus; and Bryan K. McNair, MS, is in the Department of Biostatistics and Analysis, University of Colorado Anschutz Medical Campus
| | - Bryan K McNair
- Yanira A. Owens, RDH, BS, MHA, is Clinical Instructor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Amy M. DeStaffany, RDH, BS, is Assistant Professor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Meghan E. Crow, RDH, BS, is Clinical Instructor, Department of Surgical Dentistry, University of Colorado School of Dental Medicine; Lonnie R. Johnson, DDS, PhD, is Professor, Department of Surgical Dentistry and Senior Associate Dean for Clinics and Professional Practice, University of Colorado School of Dental Medicine; Terri S. Tilliss, RDH, PhD, is Professor, Department of Orthodontics, University of Colorado School of Dental Medicine; Rachel L. Johnson, BA, MS, is in the Department of Biostatistics and Analysis, University of Colorado Anschutz Medical Campus; and Bryan K. McNair, MS, is in the Department of Biostatistics and Analysis, University of Colorado Anschutz Medical Campus
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