1
|
Bagne L, Oliveira MA, Pereira AT, Caetano GF, Oliveira CA, Aro AA, Chiarotto GB, Santos GMT, Mendonça FAS, Santamaria-Jr M. Electrical therapies act on the Ca 2+ /CaM signaling pathway to enhance bone regeneration with bioactive glass [S53P4] and allogeneic grafts. J Biomed Mater Res B Appl Biomater 2021; 109:2104-2116. [PMID: 34008329 DOI: 10.1002/jbm.b.34858] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 04/12/2021] [Accepted: 04/24/2021] [Indexed: 12/26/2022]
Abstract
This study aimed to investigate the application of low-intensity electrostimulation (ES) and electromagnetic stimulation (EM) associated with bioactive glass (BG) or allogeneic grafts (BB) in bone regeneration. A cell viability test on osteoblasts (UMR-106) was performed in the presence of BB and BG grafts associated with ES (10 μA/5 min) and EM (500 Hz/2 min). Critical defects (25 mm2 ) in calvaria were generated in male Wistar rats, and bone regeneration was evaluated on the 30th, 60th, and 120th days after surgery. Cell proliferation increased with the application of ES in both grafts and after EM with BG. Bone remodeling was more effective using the allogeneic graft in both therapies, with increased angiogenesis, osteoblast proliferation, and OPN expression in the BB + EM group. A higher number of osteoblasts and osteoclasts, and an increase in bone sialoprotein, Runx-2, and Opn gene expression were found in the BB + ES group. The BG graft associated with EM therapy had an increased proliferation of osteoblasts and increased expression of Runx-2 and Opn. Groups that had BG and ES therapy had increased numbers of osteoblasts, osteoclasts, and increased OPN expression. The expression of voltage-gated calcium channels increased in groups with ES, while calmodulin expression increased in therapies without grafting. ES and EM therapies favored the repair of bone defects upon grafting by improving angiogenesis, osteogenic gene expression, and tissue reorganization. Despite activating different pathways, both therapies increased the intracellular concentrations of calmodulin, leading to cell proliferation and bone regeneration.
Collapse
Affiliation(s)
- Leonardo Bagne
- Graduate Program in Biomedical Sciences, University Center of Hermínio Ometto Foundation - FHO, Araras, Brazil
| | - Maraiara A Oliveira
- Graduate Program in Biomedical Sciences, University Center of Hermínio Ometto Foundation - FHO, Araras, Brazil
| | - Amanda T Pereira
- Graduate Program in Biomedical Sciences, University Center of Hermínio Ometto Foundation - FHO, Araras, Brazil
| | - Guilherme F Caetano
- Graduate Program in Biomedical Sciences, University Center of Hermínio Ometto Foundation - FHO, Araras, Brazil
| | - Camila A Oliveira
- Graduate Program in Biomedical Sciences, University Center of Hermínio Ometto Foundation - FHO, Araras, Brazil
| | - Andréa A Aro
- Graduate Program in Biomedical Sciences, University Center of Hermínio Ometto Foundation - FHO, Araras, Brazil
| | - Gabriela B Chiarotto
- Graduate Program in Biomedical Sciences, University Center of Hermínio Ometto Foundation - FHO, Araras, Brazil
| | - Glaucia M T Santos
- Graduate Program in Biomedical Sciences, University Center of Hermínio Ometto Foundation - FHO, Araras, Brazil
| | - Fernanda A S Mendonça
- Graduate Program in Biomedical Sciences, University Center of Hermínio Ometto Foundation - FHO, Araras, Brazil
| | - Milton Santamaria-Jr
- Graduate Program in Biomedical Sciences, University Center of Hermínio Ometto Foundation - FHO, Araras, Brazil
| |
Collapse
|
2
|
Michael HT, Graff-Cherry C, Chin S, Rauck C, Habtemichael AD, Bunda P, Smith T, Campos MM, Bharti K, Arnheiter H, Merlino G, Day CP. Partial Rescue of Ocular Pigment Cells and Structure by Inducible Ectopic Expression of Mitf-M in MITF-Deficient Mice. Invest Ophthalmol Vis Sci 2019; 59:6067-6073. [PMID: 30590377 PMCID: PMC6314104 DOI: 10.1167/iovs.18-25186] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Purpose Complete deficiency of microphthalmia transcription factor (MITF) in Mitfmi-vga9/mi-vga9 mice is associated with microphthalmia, retinal dysplasia, and albinism. We investigated the ability of dopachrome tautomerase (DCT) promoter-mediated inducible ectopic expression of Mitf-M to rescue these phenotypic abnormalities. Methods A new mouse line was created with doxycycline-inducible ectopic Mitf-M expression on an Mitf-deficient Mitfmi-vga9 background (DMV mouse). Adult DMV mice were phenotypically characterized and tissues were collected for histology, immunohistochemistry, and evaluation of Mitf, pigmentary genes, and retinal pigment epithelium (RPE) gene expression. Results Ectopic Mitf-M expression was specifically induced in the eyes, but was not detected in the skin of DMV mice. Inducible expression of Mitf-M partially rescued the microphthalmia, RPE structure, and pigmentation as well as a subset of the choroidal and iris melanocytes but not cutaneous melanocytes. RPE function and vision were not restored in the DMV mice. Conclusions Ectopic expression of Mitf-M during development of Mitf-deficient mice is capable of partially rescuing ocular and retinal structures and uveal melanocytes. These findings provide novel information about the roles of Mitf isoforms in the development of mouse eyes.
Collapse
Affiliation(s)
- Helen T Michael
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, National Insitutes of Health, Bethesda, Maryland, United States
| | - Cari Graff-Cherry
- Laboratory Animal Science Program, National Frederick Laboratory for Cancer Research, National Insitutes of Health, Frederick, Maryland, United States
| | - Sung Chin
- Laboratory Animal Science Program, National Frederick Laboratory for Cancer Research, National Insitutes of Health, Frederick, Maryland, United States
| | - Corinne Rauck
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, National Insitutes of Health, Bethesda, Maryland, United States
| | - Amelework D Habtemichael
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, National Insitutes of Health, Bethesda, Maryland, United States
| | - Patricia Bunda
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, National Insitutes of Health, Bethesda, Maryland, United States
| | - Tunde Smith
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, National Insitutes of Health, Bethesda, Maryland, United States
| | - Maria M Campos
- Histopathology Core Facility, National Eye Institute, National Insitutes of Health, Bethesda, Maryland, United States
| | - Kapil Bharti
- Unit on Ocular and Stem Cell Translational Research, National Eye Institute, National Insitutes of Health, Bethesda, Maryland, United States
| | - Heinz Arnheiter
- Scientist Emeritus, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, United States
| | - Glenn Merlino
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, National Insitutes of Health, Bethesda, Maryland, United States
| | - Chi-Ping Day
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, National Insitutes of Health, Bethesda, Maryland, United States
| |
Collapse
|
3
|
Viceconte N, McKenna T, Eriksson M. Low levels of the reverse transactivator fail to induce target transgene expression in vascular smooth muscle cells. PLoS One 2014; 9:e104098. [PMID: 25090270 PMCID: PMC4121313 DOI: 10.1371/journal.pone.0104098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2013] [Accepted: 07/10/2014] [Indexed: 11/18/2022] Open
Abstract
Hutchinson-Gilford progeria syndrome (HGPS) is a genetic disease with multiple features that are suggestive of premature aging. Most patients with HGPS carry a mutation on one of their copies of the LMNA gene. The LMNA gene encodes the lamin A and lamin C proteins, which are the major proteins of the nuclear lamina. The organs of the cardiovascular system are amongst those that are most severely affected in HGPS, undergoing a progressive depletion of vascular smooth muscle cells, and most children with HGPS die in their early teens from cardio-vascular disease and other complications from atherosclerosis. In this study, we developed a transgenic mouse model based on the tet-ON system to increase the understanding of the molecular mechanisms leading to the most lethal aspect of HGPS. To induce the expression of the most common HGPS mutation, LMNA c.1824C>T; p.G608G, in the vascular smooth muscle cells of the aortic arch and thoracic aorta, we used the previously described reverse tetracycline-controlled transactivator, sm22α-rtTA. However, the expression of the reverse sm22α-transactivator was barely detectable in the arteries, and this low level of expression was not sufficient to induce the expression of the target human lamin A minigene. The results from this study are important because they suggest caution during the use of previously functional transgenic animal models and emphasize the importance of assessing transgene expression over time.
Collapse
Affiliation(s)
- Nikenza Viceconte
- Department of Biosciences and Nutrition, Center for Biosciences, Karolinska Institutet, Novum, Huddinge, Sweden
| | - Tomás McKenna
- Department of Biosciences and Nutrition, Center for Biosciences, Karolinska Institutet, Novum, Huddinge, Sweden
| | - Maria Eriksson
- Department of Biosciences and Nutrition, Center for Biosciences, Karolinska Institutet, Novum, Huddinge, Sweden
| |
Collapse
|
4
|
Schmidt E, Nilsson O, Koskela A, Tuukkanen J, Ohlsson C, Rozell B, Eriksson M. Expression of the Hutchinson-Gilford progeria mutation during osteoblast development results in loss of osteocytes, irregular mineralization, and poor biomechanical properties. J Biol Chem 2012; 287:33512-22. [PMID: 22893709 DOI: 10.1074/jbc.m112.366450] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Hutchinson-Gilford progeria syndrome (HGPS) is a very rare genetic disorder that is characterized by multiple features of premature aging and largely affects tissues of mesenchymal origin. In this study, we describe the development of a tissue-specific mouse model that overexpresses the most common HGPS mutation (LMNA, c.1824C>T, p.G608G) in osteoblasts. Already at the age of 5 weeks, HGPS mutant mice show growth retardation, imbalanced gait and spontaneous fractures. Histopathological examination revealed an irregular bone structure, characterized by widespread loss of osteocytes, defects in mineralization, and a hypocellular red bone marrow. Computerized tomography analysis demonstrated impaired skeletal geometry and altered bone structure. The skeletal defects, which resemble the clinical features reported for bone disease in HGPS patients, was associated with an abnormal osteoblast differentiation. The osteoblast-specific expression of the HGPS mutation increased DNA damage and affected Wnt signaling. In the teeth, irregular dentin formation, as was previously demonstrated in human progeria cases, caused severe dental abnormalities affecting the incisors. The observed phenotype also shows similarities to reported bone abnormalities in aging mice and may therefore help to uncover general principles of the aging process.
Collapse
Affiliation(s)
- Eva Schmidt
- Department of Biosciences and Nutrition, Center for Biosciences, Karolinska Institutet, Huddinge SE-14183, Sweden
| | | | | | | | | | | | | |
Collapse
|