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Wu XH, Dou B, Sun NY, Gao J, Liu XL. Astragalus saponin IV promotes osteogenic differentiation of bone marrow mesenchymal stem cells via miR-21/NGF/BMP2/Runx2 pathway. Acta Histochem 2020; 122:151549. [PMID: 32381364 DOI: 10.1016/j.acthis.2020.151549] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 03/27/2020] [Accepted: 03/28/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND Astragalus saponin IV(AS- IV) extracted from tranditional Chinese medicine Radix Astragali Mongolici, which had been reported to have medicinal properties in treating several types of diseases. This study aimed at investigating the biological functions of AS-IV on bone marrow mesenchymal cells(BMSCs) differentiation, therefore, seeking for a better application of AS-IV on fracture or other orthopedic disorders. METHODS AS-IV was co-incubated with BMSCs in vitro to testify whether it can influence the proliferation and differentiation of BMSCs. Cell proliferation activity was detected by Cell Counting Kit-8 (CCK-8), while its differentiation promoting capibility was obtained by alkaline phosphatase (ALP) activity assay and Alizarin red S staining. Besides, differentiation protein markers of preosteoblast was detected by western blots. Neuron growth factor antagonists (NGFA) and microRNA-21 (miR-21) inhibitors were co incubated with AS-IV to search the regulatory pathways it activated in BMSCs. RESULTS AS-IV incubation boosted the proliferation of BMSCs, and accelerated the differentiating direction into preosteoblasts. Runx2, OPN, BMP2, OCN proteins were up regulated after AS- IV treatment. MiR-21/NGF/BMP2/Runx2 pathway can participate the biological effects of AS- IV on BMSCs. CONCLUSION AS- IV might be used as a therapeutic agent for bone fracture or other orthopedic disorders.
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Affiliation(s)
- Xiao-Hui Wu
- Department of Orthopedics, The Second Affiliated Hospital of Hunan University of Traditional Chinese Medicine, Changsha 410005, Hunan Province, PR China
| | - Ben Dou
- Department of Orthopedics, The Second Affiliated Hospital of Hunan University of Traditional Chinese Medicine, Changsha 410005, Hunan Province, PR China
| | - Nan-Yang Sun
- Department of Orthopedics, The Second Affiliated Hospital of Hunan University of Traditional Chinese Medicine, Changsha 410005, Hunan Province, PR China
| | - Juan Gao
- Department of Orthopedics, The Second Affiliated Hospital of Hunan University of Traditional Chinese Medicine, Changsha 410005, Hunan Province, PR China
| | - Xiao-Lan Liu
- Department of Orthopedics, The Second Affiliated Hospital of Hunan University of Traditional Chinese Medicine, Changsha 410005, Hunan Province, PR China.
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Iijima H, Ito A, Nagai M, Tajino J, Yamaguchi S, Kiyan W, Nakahata A, Zhang J, Wang T, Aoyama T, Nishitani K, Kuroki H. Physiological exercise loading suppresses post-traumatic osteoarthritis progression via an increase in bone morphogenetic proteins expression in an experimental rat knee model. Osteoarthritis Cartilage 2017; 25:964-975. [PMID: 27965139 DOI: 10.1016/j.joca.2016.12.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Revised: 11/01/2016] [Accepted: 12/06/2016] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To evaluate the dose-response relationship of exercise loading in the cartilage-subchondral bone (SB) unit in surgically-induced post-traumatic osteoarthritis (PTOA) of the knee. DESIGN Destabilized medial meniscus (DMM) surgery was performed on the right knee of 12-week-old male Wistar rats, and sham surgery was performed on the contralateral knee. Four weeks after the surgery, the animals were subjected to moderate (12 m/min) or intense (21 m/min) treadmill exercises for 30 min/day, 5 days/week for 4 weeks. PTOA development in articular cartilage and SB was examined using histological and immunohistochemical analyses, micro-computed tomography (micro-CT) analysis, and biomechanical testing at 8 weeks after surgery. Gremlin-1 was injected to determine the role of bone morphogenetic protein (BMP) signaling on PTOA development following moderate exercise. RESULTS Moderate exercise increased BMP-2, BMP-4, BMP-6, BMP receptor 2, pSmad-5, and inhibitor of DNA binding protein-1 expression in the superficial zone chondrocytes and suppressed cartilage degeneration, osteophyte growth, SB damage, and osteoclast-mediated SB resorption. However, intense exercise had little effect on BMP expression and even caused progression of these osteoarthritis (OA) changes. Gremlin-1 injection following moderate exercise caused progression of the PTOA development down to the level of the non-exercise DMM-operated knee. CONCLUSIONS Exercise regulated cartilage-SB PTOA development in DMM-operated knees in a dose-dependent manner. Our findings shed light on the important role of BMP expression in superficial zone chondrocytes in attenuation of PTOA development following physiological exercise loading. Further studies to support a mechanism by which BMPs would be beneficial in preventing PTOA progression are warranted.
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Affiliation(s)
- H Iijima
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan; Japan Society for the Promotion of Science, Tokyo, Japan.
| | - A Ito
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - M Nagai
- Congenital Anomaly Research Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - J Tajino
- Department of Development and Rehabilitation of Motor Function, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - S Yamaguchi
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - W Kiyan
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - A Nakahata
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - J Zhang
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - T Wang
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - T Aoyama
- Department of Development and Rehabilitation of Motor Function, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - K Nishitani
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - H Kuroki
- Department of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
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Yu B, Tang DZ, Li SY, Wu Y, Chen M. Daidzein promotes proliferation and differentiation in osteoblastic OCT1 cells via activation of the BMP-2/Smads pathway. Pharmazie 2017; 72:35-40. [PMID: 29441895 DOI: 10.1691/ph.2017.6502] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Daidzein, the most widely studied soy phytoestrogen, is not only a potential antiosteoporosis agent owing to its possible osteogenic activity, but also shows anticancer activity. However, the mechanisms through which daidzein affects osteoblast function have not been well understood. Here, we show that daidzein stimulated cell proliferation and differentiation of osteoblasts, demonstrated by upregulation of XTT activity, enhancement of alkaline phosphatase (ALP) activity, and upregulation of osteoblast-specific marker genes, including Runt-related transcription factor 2 (Runx2) and Smad1, as well as up-regulation of Runx2 and Smad1 protein expression. To determine the mechanisms underlying daidzein's effects on osteoblast differentiation, we first tested the role of daidzein in bone morphogenetic protein (BMP)-2 gene expression in OCT1 cells, and found that it significantly upregulated the expression of BMP-2. Furthermore, it significantly enhanced the phosphorylated protein level of Smad1/5/8and protein expression of Osterix (Osx, a direct target gene of BMP signaling) and increased the activity of BMP signaling reporter (12xSBE-OC-Luc). Finally, we demonstrated that daidzein stimulated Col I, Runx2, and ALP expression, while these effects were significantly blocked by the BMP signaling inhibitor noggin. Thus, our data indicate that daidzein acts through stimulating the activation of BMP-2/Smads pathway to promote osteoblast proliferation and differentiation.
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Tian F, Patterson AT, Davick JJ, Ing SW, Kaffenberger BH, Gru AA. The cutaneous expression of vitamin K-dependent and other osteogenic proteins in calciphylaxis stratified by clinical features and warfarin use: A case control study. J Am Acad Dermatol 2016; 75:840-842.e1. [PMID: 27646745 DOI: 10.1016/j.jaad.2016.05.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Revised: 04/30/2016] [Accepted: 05/04/2016] [Indexed: 11/30/2022]
Affiliation(s)
- Frances Tian
- Ohio State University College of Medicine, Columbus
| | | | | | - Steven W Ing
- Division of Dermatology, Ohio State University Wexner Medical Center, Columbus
| | | | - Alejandro A Gru
- Department of Pathology, University of Virginia, Charlottesville
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Saben JL, Asghar Z, Rhee JS, Drury A, Scheaffer S, Moley KH. Excess Maternal Fructose Consumption Increases Fetal Loss and Impairs Endometrial Decidualization in Mice. Endocrinology 2016; 157:956-68. [PMID: 26677880 PMCID: PMC4733112 DOI: 10.1210/en.2015-1618] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The most significant increase in metabolic syndrome over the previous decade occurred in women of reproductive age, which is alarming given that metabolic syndrome is associated with reproductive problems including subfertility and early pregnancy loss. Individuals with metabolic syndrome often consume excess fructose, and several studies have concluded that excess fructose intake contributes to metabolic syndrome development. Here, we examined the effects of increased fructose consumption on pregnancy outcomes in mice. Female mice fed a high-fructose diet (HFrD) for 6 weeks developed glucose intolerance and mild fatty liver but did not develop other prominent features of metabolic syndrome such as weight gain, hyperglycemia, and hyperinsulinemia. Upon mating, HFrD-exposed mice had lower pregnancy rates and smaller litters at midgestation than chow-fed controls. To explain this phenomenon, we performed artificial decidualization experiments and found that HFrD consumption impaired decidualization. This appeared to be due to decreased circulating progesterone as exogenous progesterone administration rescued decidualization. Furthermore, HFrD intake was associated with decreased bone morphogenetic protein 2 expression and signaling, both of which were restored by exogenous progesterone. Finally, expression of forkhead box O1 and superoxide dismutase 2 [Mn] proteins were decreased in the uteri of HFrD-fed mice, suggesting that HFrD consumption promotes a prooxidative environment in the endometrium. In summary, these data suggest that excess fructose consumption impairs murine fertility by decreasing steroid hormone synthesis and promoting an adverse uterine environment.
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Affiliation(s)
- Jessica L Saben
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri 63110
| | - Zeenat Asghar
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri 63110
| | - Julie S Rhee
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri 63110
| | - Andrea Drury
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri 63110
| | - Suzanne Scheaffer
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri 63110
| | - Kelle H Moley
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri 63110
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Herencia C, Rodríguez-Ortiz ME, Muñoz-Castañeda JR, Martinez-Moreno JM, Canalejo R, Montes de Oca A, Díaz-Tocados JM, Peralbo-Santaella E, Marín C, Canalejo A, Rodriguez M, Almaden Y. Angiotensin II prevents calcification in vascular smooth muscle cells by enhancing magnesium influx. Eur J Clin Invest 2015; 45:1129-44. [PMID: 26268950 DOI: 10.1111/eci.12517] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 08/08/2015] [Indexed: 12/22/2022]
Abstract
BACKGROUND Vascular calcification (VC) is highly prevalent in patients with chronic kidney disease (CKD). Low magnesium levels are associated with VC, and recent in vitro studies confirm a protective role of magnesium, which is mediated by its entry into the VSMCs through the Transient Receptor Potential Melastatin 7 (TRPM7) channel. The role of Angiotensin II (Ang II) on VC is still unclear. As Ang II is able to stimulate TRPM7 activity, we hypothesize that it might prevent VC. Thus, the aim of this study was to dissect the direct effect of Ang II on VC. MATERIALS AND METHODS We worked with a model of high phosphate (HP)-induced calcification in human aortic smooth muscle cells, which resembles the CKD-related VC. RESULTS Addition of Ang II to cells growing in HP decreased calcification, which was associated with the upregulation of the osteogenic factors BMP2, Runx2/Cbfa1, Osterix and ALP. A reduction of magnesium entry into the HP-calcifying cells was found. The treatment with Ang II avoided this reduction, which was reversed by the cotreatment with the TRPM7-inhibitor 2-APB. The protective effect of Ang II was related to AT1R-induced ERK1/2 MAPKinase activation. HP-induced calcification was also associated with the upregulation of the canonical Wnt/beta-catenin pathway, while its downregulation was related to attenuation of calcification by Ang II. CONCLUSION As hypothesized, Ang II prevented phosphate-induced calcification in VSMCs, which appears mediated by the increase of magnesium influx and by the activation of the ERK1/2 and the inhibition of the canonical Wnt/beta-catenin signalling pathways.
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Affiliation(s)
- Carmen Herencia
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Reina Sofia University Hospital/University of Cordoba, Cordoba, Spain
| | | | - Juan R Muñoz-Castañeda
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Reina Sofia University Hospital/University of Cordoba, Cordoba, Spain
| | - Julio Manuel Martinez-Moreno
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Reina Sofia University Hospital/University of Cordoba, Cordoba, Spain
| | - Rocío Canalejo
- Department of Environmental Biology and Public Health, University of Huelva, Huelva, Spain
| | - Addy Montes de Oca
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Reina Sofia University Hospital/University of Cordoba, Cordoba, Spain
| | - Juan M Díaz-Tocados
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Reina Sofia University Hospital/University of Cordoba, Cordoba, Spain
| | - Esther Peralbo-Santaella
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Reina Sofia University Hospital/University of Cordoba, Cordoba, Spain
| | - Carmen Marín
- Lipid and Atherosclerosis Unit, IMIBIC/Reina Sofia University Hospital/University of Cordoba, Cordoba, Spain
- CIBER Fisiopatologia Obesidad y Nutricion (CIBEROBN), Instituto de Salud Carlos III, Cordoba, Spain
| | - Antonio Canalejo
- Department of Environmental Biology and Public Health, University of Huelva, Huelva, Spain
| | - Mariano Rodriguez
- REDinREN, Madrid, Spain
- Nefrology Service, Instituto Maimonides de Investigacion Biomédica de Córdoba (IMIBIC), Reina Sofia University Hospital/University of Cordoba, Cordoba, Spain
| | - Yolanda Almaden
- Lipid and Atherosclerosis Unit, IMIBIC/Reina Sofia University Hospital/University of Cordoba, Cordoba, Spain
- CIBER Fisiopatologia Obesidad y Nutricion (CIBEROBN), Instituto de Salud Carlos III, Cordoba, Spain
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Abstract
GH stimulates growth plate chondrogenesis and longitudinal bone growth directly at the growth plate. However, it is not clear yet whether these effects are entirely mediated by the local expression and action of IGF-1 and IGF-2. To determine whether GH has any IGF-independent growth-promoting effects, we generated (TamCart)Igf1r(flox/flox) mice. The systemic injection of tamoxifen in these mice postnatally resulted in the excision of the IGF-1 receptor (Igf1r) gene exclusively in the growth plate. (TamCart)Igf1r(flox/flox) tamoxifen-treated mice [knockout (KO) mice] and their Igf1r(flox/flox) control littermates (C mice) were injected for 4 weeks with GH. At the end of the 4-week period, the tibial growth and growth plate height of GH-treated KO mice were greater than those of untreated C or untreated KO mice. The systemic injection of GH increased the phosphorylation of Janus kinase 2 and signal transducer and activator of transcription 5B in the tibial growth plate of the C and KO mice. In addition, GH increased the mRNA expression of bone morphogenetic protein-2 and the mRNA expression and protein phosphorylation of nuclear factor-κB p65 in both C and KO mice. In cultured chondrocytes transfected with Igf1r small interfering RNA, the addition of GH in the culture medium significantly induced thymidine incorporation and collagen X mRNA expression. In conclusion, our findings demonstrate that GH can promote growth plate chondrogenesis and longitudinal bone growth directly at the growth plate, even when the local effects of IGF-1 and IGF-2 are prevented. Further studies are warranted to elucidate the intracellular molecular mechanisms mediating the IGF-independent, growth-promoting GH effects.
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Affiliation(s)
- Shufang Wu
- Section of Endocrinology and Diabetes (S.W., F.D.L.), St. Christopher's Hospital for Children, Drexel University College of Medicine, Philadelphia, Pennsylvania 19134; and Center for Translational Medicine (S.W., W.Y.), the First Affiliated Hospital of Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi 710061, People's Republic of China
| | - Wei Yang
- Section of Endocrinology and Diabetes (S.W., F.D.L.), St. Christopher's Hospital for Children, Drexel University College of Medicine, Philadelphia, Pennsylvania 19134; and Center for Translational Medicine (S.W., W.Y.), the First Affiliated Hospital of Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi 710061, People's Republic of China
| | - Francesco De Luca
- Section of Endocrinology and Diabetes (S.W., F.D.L.), St. Christopher's Hospital for Children, Drexel University College of Medicine, Philadelphia, Pennsylvania 19134; and Center for Translational Medicine (S.W., W.Y.), the First Affiliated Hospital of Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi 710061, People's Republic of China
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Wang C, Li H, Chen SG, He JW, Sheng CJ, Cheng XY, Qu S, Wang KS, Lu ML, Yu YC. The skeletal effects of thiazolidinedione and metformin on insulin-resistant mice. J Bone Miner Metab 2012; 30:630-7. [PMID: 22886403 DOI: 10.1007/s00774-012-0374-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Accepted: 06/24/2012] [Indexed: 12/31/2022]
Abstract
To explore the skeletal effects and the potential underlying mechanisms of treatment with two thiazolidinediones (rosiglitazone and pioglitazone) or metformin in insulin-resistant mice, 24 female, 12-week-old C57BL6J ob/ob mice were evaluated according to the following treatment groups for 6 weeks: placebo group, pioglitazone group (Pio), rosiglitazone group (Rosi), and metformin group (Met). Bone mineral density (BMD), bone microarchitecture, bone histomorphometry, and expression of three phenotype-specific gene markers, including bone morphogenetic protein 2 (Bmp2), runt-related transcription factor 2 (Runx2), and fatty acid-binding protein 4 (Fabp4), were compared across the four groups. At the femur, the Met group had the highest BMD (0.084 ± 0.001 g/cm(2)) and trabecular bone volume/total volume (0.644 ± 0.018 %) and the lowest trabecular spacing (Tb.Sp.) (0.143 ± 0.008 μm), whereas the Rosi group had lower BMD (0.076 ± 0.003 g/cm(2)) and a relatively higher degree of Tb.Sp. (0.173 ± 0.024 μm). A histomorphometric analysis revealed that in the Rosi group the number of adipocytes was fourfold higher than in the placebo group and fivefold higher than in the Met group, whereas the highest osteoid width and mineral apposition rate were found in the Met group (49.88 ± 48.53 μm and 4.46 ± 1.72 μm/day). Furthermore, the Rosi group displayed the highest level of Fabp4 gene expression, which was accompanied by normal expression levels of Bmp2 and Runx2. Seemingly, metformin is a bone-friendly antidiabetic drug. Rosiglitazone had adverse effects on the skeleton at the trabecular bone even in insulin-resistant mice, whereas no evidence of adverse effects was found for pioglitazone.
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Affiliation(s)
- Chun Wang
- Metabolic Bone Disease and Genetics Research Unit, Department of Osteoporosis and Bone Diseases, Shanghai Sixth People's Hospital affiliated with Shanghai Jiao Tong University, Shanghai, China
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Nokhbehsaim M, Deschner B, Winter J, Bourauel C, Rath B, Jäger A, Jepsen S, Deschner J. Interactions of regenerative, inflammatory and biomechanical signals on bone morphogenetic protein-2 in periodontal ligament cells. J Periodontal Res 2011; 46:374-81. [PMID: 21410703 DOI: 10.1111/j.1600-0765.2011.01357.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [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: 01/08/2023]
Abstract
BACKGROUND AND OBJECTIVE Regeneration of periodontal tissues by EMD remains a major challenge because a number of modifying factors are as yet unknown. The effects of EMD seem to be mediated, at least in part, by bone morphogenetic protein-2 (BMP-2). This in vitro study was performed to examine whether the effects of EMD on BMP-2 activity are modulated by inflammatory and/or biomechanical signals. MATERIAL AND METHODS Periodontal ligament cells were seeded on BioFlex(®) plates and exposed to EMD under normal, inflammatory or biomechanical loading conditions for 1 and 6 d. In order to mimic proinflammatory or biomechanical loading conditions in vitro, cells were stimulated with interleukin-1β (IL-1β), which is increased at inflamed periodontal sites, and cyclic tensile strain of various magnitudes, respectively. The synthesis of BMP-2, its receptors (BMPR-1A, BMPR-1B and BMPR-2) and its inhibitors (follistatin, matrix gla protein and noggin) were analyzed using real-time RT-PCR and ELISA. RESULTS In EMD-treated cells, BMP-2 synthesis was increased significantly at 1 d. EMD also induced the expression of all BMP receptors, and of the BMP inhibitors follistatin and noggin. In general, IL-1β and biomechanical loading neither down-regulated BMP-2 nor up-regulated BMP inhibitors in EMD-stimulated cells. However, IL-1β and biomechanical loading, when applied for a longer time period, caused a down-regulation of EMD-induced BMP receptors. CONCLUSION EMD induces not only BMP-2, but also its receptors and inhibitors, in PDL cells. IL-1β and biomechanical forces may counteract the beneficial effects of EMD on BMP-2 activity via the down-regulation of BMP receptors.
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Affiliation(s)
- M Nokhbehsaim
- Clinical Research Unit, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn, Germany
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De Matteo M, Brunetti AE, Maiorano E, Cafforio P, Dammacco F, Silvestris F. Constitutive down-regulation of Osterix in osteoblasts from myeloma patients: in vitro effect of Bortezomib and Lenalidomide. Leuk Res 2010; 34:243-9. [PMID: 19656567 DOI: 10.1016/j.leukres.2009.07.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Revised: 06/23/2009] [Accepted: 07/09/2009] [Indexed: 11/25/2022]
Abstract
Bortezomib and Lenalidomide have been shown to be effective in the control of multiple myeloma (MM) progression. We have investigated their role in the in vitro expression of Osterix by primary osteoblast cultures from MM patients and found that Osterix RNA was constitutively down-regulated in these cells. Treatment of osteoblasts with Bortezomib resulted in an increase of Osterix RNA and in enhanced activity of both BMP-2 and Runx2. Instead, Lenalidomide was unable to modify Osterix transcription. These findings provide additional evidence suggesting that, at least in vitro, Bortezomib promotes the osteoblast maturation whereas Lenalidomide is ineffective.
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Affiliation(s)
- Monica De Matteo
- DIMO, Department of Internal Medicine and Clinical Oncology, University of Bari Medical School, Piazza Giulio Cesare 11, 70124, Bari, Italy
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Kodama N, Nagata M, Tabata Y, Ozeki M, Ninomiya T, Takagi R. A local bone anabolic effect of rhFGF2-impregnated gelatin hydrogel by promoting cell proliferation and coordinating osteoblastic differentiation. Bone 2009; 44:699-707. [PMID: 19166987 DOI: 10.1016/j.bone.2008.12.017] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2008] [Revised: 12/11/2008] [Accepted: 12/14/2008] [Indexed: 11/19/2022]
Abstract
UNLABELLED The bone anabolic effect of rhFGF2 is attributed to activation of proliferation and differentiation of osteoblasts. Concomitant up-regulation of Runx2 and Bmp2 implies a coordinative function of FGF/FGFR signaling on osteoblast differentiation. INTRODUCTION Duration and tissue concentration of growth factor exposure are important in tissue regeneration. This study analyzed the availability of rhFGF2 using a sustained release gelatin hydrogel system. To examine biological aspects of the bone anabolic effect, we carried out morphological and cell proliferation assays together with gene expression analyses of osteoblast related genes induced by rhFGF2 using localizing and quantifying procedures in vivo. MATERIALS AND METHODS Bone formation induced by implantation of gelatin hydrogel impregnated with 20 microg rhFGF2 (rhFGF2(+)) onto mice maxillae was analyzed by micro computed tomography, proliferating cell nuclear antigen (PCNA) immunohistochemistry, in situ hybridization and quantitative real time polymerase chain reaction combined with laser microdissection (LMD-QPCR). RESULTS The bony maxilla was augmented to 1.58 times its original volume (p=0.002) by the implantation of rhFGF2(+) gelatin hydrogel. An increased number of PCNA-positive nuclei were observed among differentiated osteoblasts as well as undifferentiated mesenchymal cells. Fgfr1, Fgfr2 and Runx2 were shown to be co-expressed mainly in differentiated osteoblasts but also in osteoblast marker-negative spindle-shaped cells that were scattered within the outer layer of hyperplastic periosteum. LMD-QPCR revealed up-regulation of Bmp2 expression accompanied by increased transcription of Fgfr1, Fgfr2 and Runx2 by rhFGF2 controlled release. CONCLUSIONS rhFGF2 sustained release results in bone formation on the maxilla by positively regulating the expansion and differentiation of osteoblastic cells. It is suggested that FGF/FGFR signaling coordinates a bone anabolic effect by simultaneously activating RUNX2 and BMP2 pathways. The gelatin hydrogel system, which enables a sustained slow rate of release of rhFGF2 in tissue has advantages of optimizing bone regeneration.
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Affiliation(s)
- Naoki Kodama
- Division of Oral and Maxillofacial Surgery, Niigata University Graduate School of Medical and Dental Sciences, Gakkocho-dori 2-5274, Niigata 951-8514, Japan.
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Ma L, Zheng LW, Cheung LK. Influence of nicotine on blood perfusion and bone healing during distraction osteogenesis. Ann R Australas Coll Dent Surg 2008; 19:52-54. [PMID: 19728631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Nicotine is the main chemical component in tobacco products and its effect on bone healing remains controversial. This study aims to evaluate the influence of nicotine on blood perfusion and bone healing using a rabbit model of mandibular distraction osteogenesis. The dose dependent effect of nicotine on bone regeneration, and the effect of nicotine on blood perfusion and angiogenesis were assessed by radiography, micro-computed tomography, histological and immunohistochemical analysis, real time PCR and Laser Doppler monitoring. Results showed that bone healing was compromised by high dose nicotine treatment. Nicotine exposure increased microvessel density, whereas inhibited blood flow and bone formation. The expression of bone morphogenetic protein (BMP)-2 in osteoblasts was also decreased. The present study supported that nicotine has a dose dependant influence on bone healing in distraction osteogenesis. Nicotine compromises bone regeneration possibly by causing ischemia and inhibiting BMP expression in osteoblasts. Nicotine exposure enhances angiogenesis but can not compensate for the adverse effect of vasoconstriction.
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Affiliation(s)
- L Ma
- Faculty of Dentistry, The University of Hong Kong
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