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Stringhetta-Villar BP, Douradinho LG, Esperança TD, de Freitas RN, Cavalcante DP, Chaves-Neto AH, Dornelles RCM. The impact of resistance training on memory, gait and oxidative stress during periestropause in rats. Behav Brain Res 2024; 471:115124. [PMID: 38925510 DOI: 10.1016/j.bbr.2024.115124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 06/10/2024] [Accepted: 06/22/2024] [Indexed: 06/28/2024]
Abstract
Aging, especially in female, is complex, involving various factors such as reproductive sensitivity, cognitive and functional decline, and an imbalance in the redox system. This study aims to assess the effectiveness of long-term resistance training as a non-pharmacological strategy to mitigate the impairment of recognition memory, hippocampal redox state, and ambulation in aging female Wistar rats during the periestropause period. Thirty Wistar rats aged 17 months, in periestropause, were distributed into non-trained (NT) and resistance training (RT; stair climbing 3 times per week for 4 months) groups. Before (17 months) and after (21 months) of the RT period, the rats underwent tests for ambulation, elevated plus maze (EPM), open field, and object recognition. Biochemical and histological analyses were conducted on the hippocampus of these animals. Analysis of the results revealed that at 21 months, females in the NT group (21Mo/NT) exhibited a decreased in length (p=0.0458) and an increased in past width (p<0.0479) compared to their measurements at 17 months. However, after 4 months of RT, the female rats aged 21 months (21Mo/RT group) experienced changes in gait components, showing an increase in length (p<0.0008) and a decrease in stride width. Regarding memory, the object recognition test indicated potential cognitive improvement in 21Mo/RT animals, with significant interaction between intervention and age across all three stages of the test (total exploration time, p=0.0001; Test 1, p=0.0003; Test 2, p=0.0014). This response was notable compared to animals in the 21Mo/NT group, which showed a decline in memory capacity (p<0.01). The data showed a significant difference in relation to the age of the animals (p<0.01). The hippocampal redox state markers showed reduced lipid oxidative (p=0.028), catalase (p=0.022), and superoxide dismutase (p=0.0067) in the RT group compared to the NT group. Hippocampal cells from the 21Mo/RT group showed increased citrate synthase enzyme activity (p<0.05) and Nissl body staining (p<0.05). The results of this study demonstrate that RT performed during the periestropause phase leads to significant improvements in functional abilities, cognitive performance, and neuroplasticity in aging female rats.
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Affiliation(s)
| | - Luana Galante Douradinho
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Thaina Daguane Esperança
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Rayara Nogueira de Freitas
- Programa de Pós-Graduação em Ciência Odontológica, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Debora Prazias Cavalcante
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Antonio Hernandes Chaves-Neto
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil; Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil; Programa de Pós-Graduação em Ciência Odontológica, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Rita Cássia Menegati Dornelles
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil; Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil.
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Dos Santos Silva RA, Peres-Ueno MJ, Nicola AC, Santos LFG, Fernandes-Breitenbach F, Rubira RJG, Pereira R, Chaves-Neto AH, Dornelles RCM. The microarchitecture and chemical composition of the femur neck of senescent female rats after different physical training protocols. GeroScience 2024; 46:1927-1946. [PMID: 37776397 PMCID: PMC10828330 DOI: 10.1007/s11357-023-00948-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 09/14/2023] [Indexed: 10/02/2023] Open
Abstract
A sedentary lifestyle, coupled with a decrease in estrogen, impairs bone homeostasis, favoring to the development of osteopenia and osteoporosis, both recognized as risk factors for fractures. Here, we investigated the quality of the femur, particularly the femur neck region, and the ambulation performance of senescent rats subjected to three different physical training protocols during the periestropause period. Forty-eight female rats, 18 months of age, were subjected to a 120-day training period, three times a week. The rats were distributed into four groups: aerobic training (AT), strength training (ST), concurrent training (CT), or no training (NT). After the experimental period, at 21 months of age, ambulation performance and femur were analyzed using microtomography, Raman stereology, densitometry, and mechanical strength tests. The results demonstrated greater remodeling activity and improvement in resistance and bone microarchitecture in the femur neck of senescent female rats after undergoing physical training. Our verified higher intensities of bands related to collagen, phosphate, amide III, and amide I. Furthermore, the analysis of the secondary collagen structures indicated alterations in the collagen network due to the exercise, resulting in increased bone strength. Both AT and strength-based training proved beneficial, with AT showing greater adaptations in bone density and stiffness in the femur, while strength-based training greater adaptations in trabecular and cortical structure. These insights contribute to the understanding of the potential interventions for preventing osteopenia and osteoporosis, which are critical risk factors for fractures.
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Affiliation(s)
- Rafael Augusto Dos Santos Silva
- Multicentric Graduate Program in Physiological Sciences - SBFis/UNESP, São Paulo State University, Araçatuba, São Paulo, Brazil
- Aging Biology Research Group, Department of Basic Sciences, São Paulo State University (UNESP), School of Dentistry, Rodovia Marechal Rondon, km 527, CEP 16018-805, Araçatuba, São Paulo, Brazil
| | - Melise Jacon Peres-Ueno
- Multicentric Graduate Program in Physiological Sciences - SBFis/UNESP, São Paulo State University, Araçatuba, São Paulo, Brazil
- Aging Biology Research Group, Department of Basic Sciences, São Paulo State University (UNESP), School of Dentistry, Rodovia Marechal Rondon, km 527, CEP 16018-805, Araçatuba, São Paulo, Brazil
| | - Angela Cristina Nicola
- Multicentric Graduate Program in Physiological Sciences - SBFis/UNESP, São Paulo State University, Araçatuba, São Paulo, Brazil
- Aging Biology Research Group, Department of Basic Sciences, São Paulo State University (UNESP), School of Dentistry, Rodovia Marechal Rondon, km 527, CEP 16018-805, Araçatuba, São Paulo, Brazil
| | - Luis Fernando Gadioli Santos
- Multicentric Graduate Program in Physiological Sciences - SBFis/UNESP, São Paulo State University, Araçatuba, São Paulo, Brazil
- Aging Biology Research Group, Department of Basic Sciences, São Paulo State University (UNESP), School of Dentistry, Rodovia Marechal Rondon, km 527, CEP 16018-805, Araçatuba, São Paulo, Brazil
| | - Fernanda Fernandes-Breitenbach
- Multicentric Graduate Program in Physiological Sciences - SBFis/UNESP, São Paulo State University, Araçatuba, São Paulo, Brazil
- Aging Biology Research Group, Department of Basic Sciences, São Paulo State University (UNESP), School of Dentistry, Rodovia Marechal Rondon, km 527, CEP 16018-805, Araçatuba, São Paulo, Brazil
| | - Rafael Jesus Gonçalves Rubira
- Physics Department, São Paulo State University (UNESP), School of Technology and Sciences, Presidente Prudente, São Paulo, Brazil
| | - Rafael Pereira
- Integrative Physiology Research Center, Department of Biological Sciences, Universidade Estadual do Sudoeste da Bahia (UESB), Jequie, Bahia, 45210-506, Brazil
| | - Antônio Hernandes Chaves-Neto
- Multicentric Graduate Program in Physiological Sciences - SBFis/UNESP, São Paulo State University, Araçatuba, São Paulo, Brazil
- Aging Biology Research Group, Department of Basic Sciences, São Paulo State University (UNESP), School of Dentistry, Rodovia Marechal Rondon, km 527, CEP 16018-805, Araçatuba, São Paulo, Brazil
| | - Rita Cássia Menegati Dornelles
- Multicentric Graduate Program in Physiological Sciences - SBFis/UNESP, São Paulo State University, Araçatuba, São Paulo, Brazil.
- Aging Biology Research Group, Department of Basic Sciences, São Paulo State University (UNESP), School of Dentistry, Rodovia Marechal Rondon, km 527, CEP 16018-805, Araçatuba, São Paulo, Brazil.
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Gao H, Zhao Y, Zhao L, Wang Z, Yan K, Gao B, Zhang L. The Role of Oxidative Stress in Multiple Exercise-Regulated Bone Homeostasis. Aging Dis 2023; 14:1555-1582. [PMID: 37196112 PMCID: PMC10529750 DOI: 10.14336/ad.2023.0223] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Accepted: 02/23/2023] [Indexed: 05/19/2023] Open
Abstract
Bone is a tissue that is active throughout the lifespan, and its physiological activities, such as growth, development, absorption, and formation, are always ongoing. All types of stimulation that occur in sports play an important role in regulating the physiological activities of bone. Here, we track the latest research progress locally and abroad, summarize the recent, relevant research results, and systematically summarize the effects of different types of exercise on bone mass, bone strength and bone metabolism. We found that different types of exercise have different effects on bone health due to their unique technical characteristics. Oxidative stress is an important mechanism mediating the exercise regulation of bone homeostasis. Excessive high-intensity exercise does not benefit bone health but induces a high level of oxidative stress in the body, which has a negative impact on bone tissue. Regular moderate exercise can improve the body's antioxidant defense ability, inhibit an excessive oxidative stress response, promote the positive balance of bone metabolism, delay age-related bone loss and deterioration of bone microstructures and have a prevention and treatment effect on osteoporosis caused by many factors. Based on the above findings, we provide evidence for the role of exercise in the prevention and treatment of bone diseases. This study provides a systematic basis for clinicians and professionals to reasonably formulate exercise prescriptions and provides exercise guidance for patients and the general public. This study also provides a reference for follow-up research.
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Affiliation(s)
- Haoyang Gao
- School of Exercise and Health, Shanghai University of Sport, Shanghai, China
| | - Yilong Zhao
- Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Linlin Zhao
- School of Exercise and Health, Shanghai University of Sport, Shanghai, China
| | - Zhikun Wang
- School of Exercise and Health, Shanghai University of Sport, Shanghai, China
| | - Kai Yan
- School of Exercise and Health, Shanghai University of Sport, Shanghai, China
| | - Bo Gao
- Institute of Orthopedic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Lingli Zhang
- College of Athletic Performance, Shanghai University of Sport, Shanghai, China
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Galdino-Alves DA, Pereira GJDS, Bertolini NDO, Ferreira RD, Santos MDS, Barrioni BR, Pereira MDM, Andrade EF, Bianco-Borges BD, Pereira LJ. Effect of resistance training combined with β-glucan ingestion on bone of ovariectomized mice. Climacteric 2022; 25:595-602. [DOI: 10.1080/13697137.2022.2077097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- D. A. Galdino-Alves
- Health Sciences Department, Universidade Federal de Lavras (UFLA), Lavras, Brazil
| | - G. J. de Sá Pereira
- Health Sciences Department, Universidade Federal de Lavras (UFLA), Lavras, Brazil
| | | | - R. D. Ferreira
- Health Sciences Department, Universidade Federal de Lavras (UFLA), Lavras, Brazil
| | - M. de Souza Santos
- Department of Metallurgical and Materials Engineering, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - B. R. Barrioni
- Department of Metallurgical and Materials Engineering, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - M. de Magalhães Pereira
- Department of Metallurgical and Materials Engineering, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - E. F. Andrade
- Physiology Area, Agrarian Sciences Institute, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Unaí, Brazil
| | - B. Del Bianco-Borges
- Health Sciences Department, Universidade Federal de Lavras (UFLA), Lavras, Brazil
| | - L. J. Pereira
- Health Sciences Department, Universidade Federal de Lavras (UFLA), Lavras, Brazil
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Santos LFG, Fernandes-Breitenbach F, Silva RAS, Santos DR, Peres-Ueno MJ, Ervolino E, Chaves-Neto AH, Dornelles RCM. The action of oxytocin on the bone of senescent female rats. Life Sci 2022; 297:120484. [PMID: 35301015 DOI: 10.1016/j.lfs.2022.120484] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 03/07/2022] [Accepted: 03/10/2022] [Indexed: 10/18/2022]
Abstract
AIMS This study verified the action of oxytocin (OT) as a preventive measure to control bone damage during aging in female rats. MAIN METHODS Wistar rats received saline (0.15 mol/L/IP; Vehicle Group), Atosiban/AT (300 μg/Kg/IP; At Group), OT (134 μg/Kg/IP; Ot Group), or AT+OT (OT injections 5 min after AT; At+Ot Group), at 19 and 20 months of age. A functional test was performed immediately before and 30 days after the injections to analyze the animals' gait. KEY FINDINGS Animals in the At group had higher alkaline phosphatase (ALP) activity, lower cortical and trabecular thickness, fewer trabeculae, higher expression of tartrate-resistant acid phosphatase (TRAP) and lower osteocalcin (OCN), higher cortical porosity, and lower moment of inertia and bone strength at the femoral neck. OT administration increased lipidic peroxidation and plasma superoxide dismutase (SOD), and provided, in the femoral neck, lower expression of TRAP and higher OCN, greater cortical and trabecular thickness, a greater number of trabeculae, bone mineral density (BMD), higher inertia bone strength, and lower cortical porosity. At + Ot group showed great similarity with the vehicle group, higher SOD, and BMD. An increase in stride length and no increase in base width of 21-month-old animals were observed after OT, unlike animal's vehicle or AT. SIGNIFICANCE Endogenous OT plays an important role in the regulation of bone remodeling during periestropause, and exogenous OT stands out as a potential preventive intervention in this period to improve bone quality with functional repercussions, possibly providing better gait activity.
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Affiliation(s)
| | | | | | - Damáris Raíssa Santos
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas/SBFis/UNESP, Brazil
| | | | - Edilson Ervolino
- Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Antonio Hernandes Chaves-Neto
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas/SBFis/UNESP, Brazil; Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Rita Cássia Menegati Dornelles
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas/SBFis/UNESP, Brazil; Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil.
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6
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Oxytocin and bone quality in the femoral neck of rats in periestropause. Sci Rep 2020; 10:7937. [PMID: 32404873 PMCID: PMC7220952 DOI: 10.1038/s41598-020-64683-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 04/17/2020] [Indexed: 11/08/2022] Open
Abstract
The objective of this study is to identify whether oxytocin (OT) contributes to the reduction of osteopenia in the femoral neck of rats in periestropause. Animals in irregular estrous cycles received two NaCl injections (0.15 mol/L) or OT (134 μg/kg) over a 12-h interval, and after thirty-five days without treatments, the biological sample collection was performed. The oxytocin group (Ot) demonstrated the highest enzymatic activity of alkaline phosphatase (p = 0.0138), lowest enzymatic activity of tartrate-resistant acid phosphatase (p = 0.0045), higher percentage of compact bone (p = 0.0359), cortical expression of runt-related transcription factor 2 (p = 0.0101), osterix (p = 0.0101), bone morphogenetic protein-2/4 (p = 0.0101) and periostin (p = 0.0455). Furthermore, the mineral-to-matrix ratio (ν1PO4/Proline) was higher and type-B carbonate substitution (CO3/ν1PO4) was lower (p = 0.0008 and 0.0303) in Ot group. The Ot showed higher areal bone mineral density (p = 0.0050), cortical bone area (p = 0.0416), polar moment of inertia, maximum, minimum (p = 0.0480, 0.0480, 0.0035), bone volume fraction (p = 0.0166), connectivity density (p < 0.0001), maximal load (p = 0.0003) and bone stiffness (p = 0.0145). In Ot percentage of cortical pores (p = 0.0102) and trabecular number (p = 0.0088) was lower. The results evidence action of OT in the reduction of osteopenia, suggesting that it is a promising anabolic strategy for the prevention of primary osteoporosis during the periestropause period.
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Peres-Ueno MJ, Fernandes F, Brito VGB, Nicola ÂC, Stringhetta-Garcia CT, Castoldi RC, Menezes AP, Ciarlini PC, Louzada MJQ, Oliveira SHP, Ervolino E, Chaves-Neto AH, Dornelles RCM. Effect of pre-treatment of strength training and raloxifene in periestropause on bone healing. Bone 2020; 134:115285. [PMID: 32097761 DOI: 10.1016/j.bone.2020.115285] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 01/31/2020] [Accepted: 02/14/2020] [Indexed: 01/15/2023]
Abstract
BACKGROUND There is evidence that strength training (ST) and raloxifene (Ral) treatment during periestropause promotes better bone quality. We wanted to determine whether the skeletal benefits of ST or Ral treatment, performed during periestropause, would persist after fracture. Therefore, the present study aimed to analyze the influence of pre-treatment with ST and administration of Ral during periestropause on bone healing after total unilateral osteotomy. METHODS Senescent female Wistar rats between 18 and 21 months of age, performed ST on a ladder three times per week, were administered Ral by gavage (2.3 mg/kg/day), or an association of both. After 120 days, the treatments were interrupted, and a total osteotomy was performed on the left tibia in all animals. They were euthanized 1 and 8 weeks post-osteotomy. RESULTS The administration of Ral during periestropause worsened the biochemical and oxidative profile, decreased gene expression of markers related to bone resorption and remodeling, which negatively affected the physicochemical properties; this lead to changes in the bone callus microarchitecture and mass, as well as a decrease in callus resistance to torsional deformation, resulting in lower tissue quality during bone healing. In contrast, ST performed prior to the osteotomy resulted in better bone healing, improvement of the biochemical and oxidative profile, alteration of the genetic profile in favor of bone formation and resorption, as well as the physic-ochemical properties of the callus. These changes led to better microarchitecture and bone mass and increased callus resistance to torsional deformation, confirming its beneficial effect on the quality of bone tissue, providing acceleration of bone consolidation. The combination of therapies at this exercise intensity and drug dosage showed a negative interaction, where the negative effect of Ral overcame the positive effect of ST, leading to decreased tissue quality in the bone healing process. CONCLUSIONS This study indicates that in addition to excellent non-pharmacological therapy and action in the prevention of osteoporosis, ST performed during the aging period may increase bone quality at the onset of healing and provide improved bone consolidation. Furthermore, the anti-osteoclastogenic effect of Ral shown in this model delayed the bone repair process, resulting in considerable clinical concern.
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Affiliation(s)
- Melise Jacon Peres-Ueno
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil.
| | - Fernanda Fernandes
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Victor Gustavo Balera Brito
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Ângela Cristina Nicola
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Camila Tami Stringhetta-Garcia
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Robson Chacon Castoldi
- Faculty of Science and Technology, São Paulo State University (UNESP), Presidente Prudente, São Paulo, Brazil
| | - Amanda Pinatti Menezes
- Department of Support, Production and Animal Health, School of Veterinary Medicine, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Paulo Cézar Ciarlini
- Department of Support, Production and Animal Health, School of Veterinary Medicine, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Mário Jeferson Quirino Louzada
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Sandra Helena Penha Oliveira
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil; Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Edilson Ervolino
- Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Antonio Hernandes Chaves-Neto
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil; Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Rita Cassia Menegati Dornelles
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil; Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil.
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