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Pires JLDS, de Carvalho JJ, Pereira MJDS, Brum IDS, Nascimento ALR, dos Santos PGP, Frigo L, Fischer RG. Repair of Critical Size Bone Defects Using Synthetic Hydroxyapatite or Xenograft with or without the Bone Marrow Mononuclear Fraction: A Histomorphometric and Immunohistochemical Study in Rat Calvaria. Materials (Basel) 2021; 14:ma14112854. [PMID: 34073482 PMCID: PMC8199028 DOI: 10.3390/ma14112854] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 04/23/2021] [Accepted: 05/19/2021] [Indexed: 11/16/2022]
Abstract
Bone defects are a challenging clinical situation, and the development of hydroxyapatite-based biomaterials is a prolific research field that, in addition, can be joined by stem cells and growth factors in order to deal with the problem. This study compares the use of synthetic hydroxyapatite and xenograft, used pure or enriched with bone marrow mononuclear fraction for the regeneration of critical size bone defects in rat calvaria through histomorphometric (Masson's staining) and immunohistochemical (anti-VEGF, anti-osteopontin) analysis. Forty young adult male rats were divided into five groups (n = 8). Animals were submitted to critical size bone defects (Ø = 8 mm) in the temporoparietal region. In the control group, there was no biomaterial placement in the critical bone defects; in group 1, it was filled with synthetic hydroxyapatite; in group 2, it was filled with xenograft; in group 3, it was filled with synthetic hydroxyapatite, enriched with bone marrow mononuclear fraction (BMMF), and in group 4 it was filled with xenograft, enriched with BMMF. After eight weeks, all groups were euthanized, and histological section images were captured and analyzed. Data analysis showed that in groups 1, 2, 3 and 4 (received biomaterials and biomaterials plus BMMF), a significant enhancement in new bone matrix formation was observed in relation to the control group. However, BMMF-enriched groups did not differ from hydroxyapatite-based biomaterials-only groups. Therefore, in this experimental model, BMMF did not enhance hydroxyapatite-based biomaterials' potential to induce bone matrix and related mediators.
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Affiliation(s)
- Jorge Luís da Silva Pires
- Department of Periodontology, PhD Candidate in Periodontology, School of Dentistry, State University of Rio de Janeiro, Rio de Janeiro 20551-030, Brazil
- Correspondence: ; Tel.: +55-21-986794126
| | - Jorge José de Carvalho
- Laboratory of Cell Ultrastructure and Tissue Biology, Department of Histology and Embryology, State University of Rio de Janeiro, Rio de Janeiro 20550-900, Brazil; (J.J.d.C.); (M.J.d.S.P.); (I.d.S.B.); (A.L.R.N.)
| | - Mario José dos Santos Pereira
- Laboratory of Cell Ultrastructure and Tissue Biology, Department of Histology and Embryology, State University of Rio de Janeiro, Rio de Janeiro 20550-900, Brazil; (J.J.d.C.); (M.J.d.S.P.); (I.d.S.B.); (A.L.R.N.)
| | - Igor da Silva Brum
- Laboratory of Cell Ultrastructure and Tissue Biology, Department of Histology and Embryology, State University of Rio de Janeiro, Rio de Janeiro 20550-900, Brazil; (J.J.d.C.); (M.J.d.S.P.); (I.d.S.B.); (A.L.R.N.)
| | - Ana Lucia Rosa Nascimento
- Laboratory of Cell Ultrastructure and Tissue Biology, Department of Histology and Embryology, State University of Rio de Janeiro, Rio de Janeiro 20550-900, Brazil; (J.J.d.C.); (M.J.d.S.P.); (I.d.S.B.); (A.L.R.N.)
| | - Paulo Gonçalo Pinto dos Santos
- Department of Periodontology, School of Dentistry, State University of Rio de Janeiro, Rio de Janeiro 20551-030, Brazil; (P.G.P.d.S.); (R.G.F.)
| | - Lucio Frigo
- Department of Periodontology, School of Dentistry, Universidade Guarulhos, Guarulhos 07023-070, Brazil;
| | - Ricardo Guimaraes Fischer
- Department of Periodontology, School of Dentistry, State University of Rio de Janeiro, Rio de Janeiro 20551-030, Brazil; (P.G.P.d.S.); (R.G.F.)
- Department of Periodontology, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro 22451-900, Brazil
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Sequeira CM, Martins MA, Alves R, Nascimento ALR, Botti GCRM, Rocha VN, Matsuura C. Aerobic exercise training attenuates doxorubicin-induced ultrastructural changes in rat ventricular myocytes. Life Sci 2021; 264:118698. [PMID: 33137370 DOI: 10.1016/j.lfs.2020.118698] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 10/19/2020] [Accepted: 10/28/2020] [Indexed: 11/28/2022]
Abstract
AIMS To investigate the effects of aerobic exercise training on cardiomyocyte ultrastructure, oxidative stress, and activation of protein synthesis pathways in a model of cardiomyopathy induced by doxorubicin (Dox). MAIN METHODS Male Sprague Dawley rats were randomly assigned to Control (saline, sedentary), Dox/sedentary (DoxSed), or Dox/exercise (DoxEx) groups. Saline or Dox were injected i.p. for 10 days (1 mg/kg/d). Aerobic exercise training was performed for 9 wks (starting with drug administration) on a treadmill, 5 d/wk, 30 min/d at 60% of maximum velocity. After euthanasia, the left ventricle (LV) was dissected, and processed for microscopy or frozen for Western blot and kinetic measurement of antioxidant enzymes activity. KEY FINDINGS Dox resulted in a mortality of 31.2% of sedentary animals, whilst all animals from both Control and DoxEx groups survived. DoxSed animals presented increased LV connective tissue deposition alongside with massive sarcomeric disorganization with dissolution of myofibrils and wavy Z-lines. There was an increase in oxidative damage and a reduction in the activation of both Akt and ERK pathways in LV from DoxSed compared to Control group. Aerobic training caused notable changes in myocardial structure with reduced fibrosis and preservation of myofibrils integrity and sarcomere organization. This was associated with reduced LV oxidative damage and increased activity of antioxidant enzymes, and an increase in the activation of PI3K-Akt pathway. SIGNIFICANCE Aerobic exercise training was effective in preventing mortality caused by Dox and in preserving LV ultrastructure, partially via activation of the physiological protein synthesis pathway, PI3K-Akt, and reducing oxidative stress.
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Affiliation(s)
- Claudia Morais Sequeira
- Department of Pharmacology and Psychobiology, University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcela Anjos Martins
- Department of Physiological Sciences, Federal University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Renata Alves
- Department of Pharmacology and Psychobiology, University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ana Lucia Rosa Nascimento
- Department of Histology and Embryology, University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Giuly Cristina Rodrigues Mello Botti
- Laboratory of Pathology and Veterinary Histology, Department of Veterinary Medicine, Faculty of Medicine, Federal University of Juiz de Fora, Minas Gerais, Brazil
| | - Vinicius Novaes Rocha
- Laboratory of Pathology and Veterinary Histology, Department of Veterinary Medicine, Faculty of Medicine, Federal University of Juiz de Fora, Minas Gerais, Brazil
| | - Cristiane Matsuura
- Department of Pharmacology and Psychobiology, University of the State of Rio de Janeiro, Rio de Janeiro, Brazil.
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da Silva Brum I, Frigo L, Lana Devita R, da Silva Pires JL, Hugo Vieira de Oliveira V, Rosa Nascimento AL, de Carvalho JJ. Histomorphometric, Immunohistochemical, Ultrastructural Characterization of a Nano-Hydroxyapatite/Beta-Tricalcium Phosphate Composite and a Bone Xenograft in Sub-Critical Size Bone Defect in Rat Calvaria. Materials (Basel) 2020; 13:ma13204598. [PMID: 33076561 PMCID: PMC7602735 DOI: 10.3390/ma13204598] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 10/09/2020] [Accepted: 10/12/2020] [Indexed: 12/17/2022]
Abstract
Nowadays, we can observe a worldwide trend towards the development of synthetic biomaterials. Several studies have been conducted to better understand the cellular mechanisms involved in the processes of inflammation and bone healing related to living tissues. The aim of this study was to evaluate tissue behaviors of two different types of biomaterials: synthetic nano-hydroxyapatite/beta-tricalcium phosphate composite and bone xenograft in sub-critical bone defects in rat calvaria. Twenty-four rats underwent experimental surgery in which two 3 mm defects in each cavity were tested. Rats were divided into two groups: Group 1 used xenogen hydroxyapatite (Bio Oss™); Group 2 used synthetic nano-hydroxyapatite/beta-tricalcium phosphate (Blue Bone™). Sixty days after surgery, calvaria bone defects were filled with biomaterial, animals were euthanized, and tissues were stained with Masson’s trichrome and periodic acid–Schiff (PAS) techniques, immune-labeled with anti-TNF-α and anti-MMP-9, and electron microscopy analyses were also performed. Histomorphometric analysis indicated a greater presence of protein matrix in Group 2, in addition to higher levels of TNF-α and MMP-9. Ultrastructural analysis showed that biomaterial fibroblasts were associated with the tissue regeneration stage. Paired statistical data indicated that Blue Bone™ can improve bone formation/remodeling when compared to biomaterials of xenogenous origin.
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Affiliation(s)
- Igor da Silva Brum
- Implantology Department, State University of Rio de Janeiro, Rio de Janeiro 20550-900, Brazil;
- Correspondence: ; Tel.: +55-21-988-244-976
| | - Lucio Frigo
- Periodontology Department, Universidade Guarulhos, Guarulhos 07023-070, São Paulo, Brazil;
| | - Renan Lana Devita
- Orthodontics Department, State University Barcelona, 08193 Barcelona, Spain;
| | | | - Victor Hugo Vieira de Oliveira
- Biology Department, State University of Rio de Janeiro, Rio de Janeiro 20550-900, Brazil; (V.H.V.d.O.); (A.L.R.N.); (J.J.d.C.)
| | - Ana Lucia Rosa Nascimento
- Biology Department, State University of Rio de Janeiro, Rio de Janeiro 20550-900, Brazil; (V.H.V.d.O.); (A.L.R.N.); (J.J.d.C.)
| | - Jorge José de Carvalho
- Biology Department, State University of Rio de Janeiro, Rio de Janeiro 20550-900, Brazil; (V.H.V.d.O.); (A.L.R.N.); (J.J.d.C.)
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Gouvêa ALF, Cosendey RIJ, Nascimento ALR, Carvalho FR, Silva AA, de Moraes HP, Rochael MC, Varella RB, Almeida SG, Almeida JR, Lugon JR. BK polyomavirus nephropathy in two kidney transplant patients with distinct diagnostic strategies for BK virus and similar clinical outcomes: two case reports. J Med Case Rep 2017; 11:146. [PMID: 28535782 PMCID: PMC5442665 DOI: 10.1186/s13256-017-1300-9] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Accepted: 04/21/2017] [Indexed: 12/18/2022] Open
Abstract
Background BK polyomavirus-associated nephropathy is an important cause of post-transplantation renal failure. We present two cases of BK polyomavirus-associated nephropathy who were submitted to contrasting strategies of clinical follow-up to BK polyomavirus reactivation, but progressed to a similar final outcome. Case presentation Case 1 is a 37-year-old white man whose graft had never presented a good glomerular filtration rate function, with episodes of tacrolimus nephrotoxicity, and no urinary monitoring for BK polyomavirus; stage B BK polyomavirus-associated nephropathy was diagnosed by biopsy at 14 months post-transplant. Despite clinical treatment (dosage decrease and immunosuppressive drug change), he progressed to stage C BK polyomavirus-associated nephropathy and loss of graft function 30 months post-transplant. Case 2 is a 49-year-old mulatto man in his second renal transplantation who was submitted to cytological urinary monitoring for BK polyomavirus; he presented early, persistent, and massive urinary decoy cell shedding and concomitant tacrolimus nephrotoxicity. Even with decreasing immunosuppression, he developed BK polyomavirus-associated nephropathy 1-year post-transplant. Loss of graft function occurred 15 months post-transplant. Conclusions Cytological urinary monitoring was an efficient strategy for monitoring BK virus reactivation. Decoy cell shedding may be related to BK polyomavirus-associated nephropathy when extensive and persistent. The presence of associated tacrolimus nephrotoxicity may be a confounding factor for the clinical diagnosis of BK polyomavirus-associated nephropathy.
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Affiliation(s)
- Ana Luisa Figueira Gouvêa
- Laboratório Multiusuário de Apoio à Pesquisa em Nefrologia e Ciências Médicas (LAMAP), Department of Clinical Medicine, Universidade Federal Fluminense, Rua Marquês do Paraná, 303, Niterói, 24033-900, Rio de Janeiro, Brazil. .,Department of Pathology, Universidade Federal Fluminense, Niterói, Brazil.
| | - Rachel Ingrid Juliboni Cosendey
- Laboratório Multiusuário de Apoio à Pesquisa em Nefrologia e Ciências Médicas (LAMAP), Department of Clinical Medicine, Universidade Federal Fluminense, Rua Marquês do Paraná, 303, Niterói, 24033-900, Rio de Janeiro, Brazil
| | | | - Fabiana Rabe Carvalho
- Laboratório Multiusuário de Apoio à Pesquisa em Nefrologia e Ciências Médicas (LAMAP), Department of Clinical Medicine, Universidade Federal Fluminense, Rua Marquês do Paraná, 303, Niterói, 24033-900, Rio de Janeiro, Brazil
| | - Andrea Alice Silva
- Laboratório Multiusuário de Apoio à Pesquisa em Nefrologia e Ciências Médicas (LAMAP), Department of Clinical Medicine, Universidade Federal Fluminense, Rua Marquês do Paraná, 303, Niterói, 24033-900, Rio de Janeiro, Brazil.,Department of Pathology, Universidade Federal Fluminense, Niterói, Brazil
| | - Heleno Pinto de Moraes
- Department of Pathology, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Rafael Brandão Varella
- Laboratório Multiusuário de Apoio à Pesquisa em Nefrologia e Ciências Médicas (LAMAP), Department of Clinical Medicine, Universidade Federal Fluminense, Rua Marquês do Paraná, 303, Niterói, 24033-900, Rio de Janeiro, Brazil
| | - Stephanie Gomes Almeida
- Department of Preventive Medicine, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Jorge Reis Almeida
- Laboratório Multiusuário de Apoio à Pesquisa em Nefrologia e Ciências Médicas (LAMAP), Department of Clinical Medicine, Universidade Federal Fluminense, Rua Marquês do Paraná, 303, Niterói, 24033-900, Rio de Janeiro, Brazil
| | - Jocemir Ronaldo Lugon
- Laboratório Multiusuário de Apoio à Pesquisa em Nefrologia e Ciências Médicas (LAMAP), Department of Clinical Medicine, Universidade Federal Fluminense, Rua Marquês do Paraná, 303, Niterói, 24033-900, Rio de Janeiro, Brazil
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