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Modukuri RK, Choudhary D, Gupta S, Rao KB, Adhikary S, Sharma T, Siddiqi MI, Trivedi R, Sashidhara KV. Benzofuran-dihydropyridine hybrids: A new class of potential bone anabolic agents. Bioorg Med Chem 2017; 25:6450-6466. [PMID: 29097030 DOI: 10.1016/j.bmc.2017.10.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 10/04/2017] [Accepted: 10/16/2017] [Indexed: 12/31/2022]
Abstract
A series of novel benzofuran-dihydropyridine hybrids were designed by molecular hybridization approach and evaluated for bone anabolic activities. Among the screened library, ethyl 4-(7-(sec-butyl)-2-(4-methylbenzoyl)benzofuran-5-yl)-2-methyl-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate (compound 21) significantly enhanced the ALP production and mineralized nodule formation, which are primary requisites in the process of in vitro osteogenesis. Oral administration of compound 21 at 10 mg.kg-1 day-1 for two weeks led to restoration of trabecular bone microarchitecture in drill hole fracture model by significantly increasing BV/TV and Tb.N. Furthermore, histological and molecular studies showed compound 21 triggering the new bone regeneration in a drill hole defect site by increasing BMP expression. Furthermore, molecular modeling studies were performed to gain insight into the binding approach, which revealed that both benzofuran and dihydropyridine moieties are essential to show similar binding interactions to fit into the active site of BMP2 receptor, an important target of the osteogenic agents. Our results suggest that compound 21 stimulates BMP2 synthesis in osteoblast cells that promotes new bone formation (∼40%) at the fracture site which helps in shorten the healing period.
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Affiliation(s)
- Ram K Modukuri
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, (CSIR-CDRI), BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India
| | - Dharmendra Choudhary
- Endocrinology Division, CSIR-Central Drug Research Institute, (CSIR-CDRI), BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India
| | - Sampa Gupta
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, (CSIR-CDRI), BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India
| | - K Bhaskara Rao
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, (CSIR-CDRI), BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India
| | - Sulekha Adhikary
- Endocrinology Division, CSIR-Central Drug Research Institute, (CSIR-CDRI), BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India
| | - Tanuj Sharma
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, (CSIR-CDRI), BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India
| | - Mohammad Imran Siddiqi
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, (CSIR-CDRI), BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India
| | - Ritu Trivedi
- Endocrinology Division, CSIR-Central Drug Research Institute, (CSIR-CDRI), BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India.
| | - Koneni V Sashidhara
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, (CSIR-CDRI), BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, India.
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Elkasabgy NA, Mahmoud AA, Shamma RN. Determination of cytocompatibility and osteogenesis properties of in situ forming collagen-based scaffolds loaded with bone synthesizing drug for bone tissue engineering. INT J POLYM MATER PO 2017. [DOI: 10.1080/00914037.2017.1354195] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Nermeen Adel Elkasabgy
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, Egypt
| | - Azza Ahmed Mahmoud
- Department of Pharmaceutical Technology, National Research Center, Dokki, Cairo, Egypt
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, Future University in Egypt, Cairo, Egypt
| | - Rehab Nabil Shamma
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, Egypt
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Holloway KL, Yousif D, Bucki-Smith G, Hosking S, Betson AG, Williams LJ, Brennan-Olsen SL, Kotowicz MA, Sepetavc A, Pasco JA. Lower limb fracture presentations at a regional hospital. Arch Osteoporos 2017; 12:75. [PMID: 28849404 DOI: 10.1007/s11657-017-0369-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 08/14/2017] [Indexed: 02/03/2023]
Abstract
UNLABELLED We found that lower limb fractures, which were largely the result of minimal trauma, had high levels of hospitalisation, length of stay and surgery. It is therefore important to prevent fractures at all sites to avoid the associated morbidity and mortality. PURPOSE Hip fractures are a major cause of morbidity and mortality, particularly in older women. In comparison, less is known about the epidemiology and burden of other lower limb fractures. The study aimed to investigate the epidemiology and burden of these fractures. METHODS Incident fractures of the hip, femur, tibia/fibula, ankle and foot in women (≥ 20 years) managed through the University Hospital Geelong, Australia, were ascertained from 1 Jan. 2014 to 31 Dec. 2014 from radiology reports. Age, cause of fracture, post-fracture hospitalisation, surgery, length of stay and discharge location were ascertained from medical records. RESULTS We identified 585 fractures of the lower limb (209 hip, 42 femur, 41 tibia/fibula, 162 ankle, 131 foot). Most fractures were sustained by women aged ≥ 50 years. Fractures were largely a result of minimal trauma. Most women with hip or femur fractures were hospitalised; fewer were hospitalised for fractures at other sites. Surgery for fracture followed the same pattern as hospitalisations. Length of stay was the highest for hip and femur fractures and the lowest for foot fractures. Women with hip or femur fractures were discharged to rehabilitation more often than home. Fractures at other sites were most commonly discharged home. CONCLUSIONS Fractures of the lower limb occurred frequently in older women. Hospitalisation and subsequent surgery were common in cases of hip and femur fractures. It is important for prevention strategies to target fractures at a range of skeletal sites to reduce costs, hospitalisations, loss of independence and reduced quality of life.
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Affiliation(s)
- K L Holloway
- Epi-Centre for Healthy Ageing (ECHA), IMPACT Strategic Research Centre, School of Medicine, Deakin University, PO Box 281, (Barwon Health), Geelong, VIC, 3220, Australia.
| | - D Yousif
- Epi-Centre for Healthy Ageing (ECHA), IMPACT Strategic Research Centre, School of Medicine, Deakin University, PO Box 281, (Barwon Health), Geelong, VIC, 3220, Australia
| | - G Bucki-Smith
- Epi-Centre for Healthy Ageing (ECHA), IMPACT Strategic Research Centre, School of Medicine, Deakin University, PO Box 281, (Barwon Health), Geelong, VIC, 3220, Australia
| | - S Hosking
- Epi-Centre for Healthy Ageing (ECHA), IMPACT Strategic Research Centre, School of Medicine, Deakin University, PO Box 281, (Barwon Health), Geelong, VIC, 3220, Australia
- Australian Institute for Musculoskeletal Science (AIMSS), The University of Melbourne, Parkville, Australia
| | - A G Betson
- Epi-Centre for Healthy Ageing (ECHA), IMPACT Strategic Research Centre, School of Medicine, Deakin University, PO Box 281, (Barwon Health), Geelong, VIC, 3220, Australia
| | - L J Williams
- Epi-Centre for Healthy Ageing (ECHA), IMPACT Strategic Research Centre, School of Medicine, Deakin University, PO Box 281, (Barwon Health), Geelong, VIC, 3220, Australia
| | - S L Brennan-Olsen
- Epi-Centre for Healthy Ageing (ECHA), IMPACT Strategic Research Centre, School of Medicine, Deakin University, PO Box 281, (Barwon Health), Geelong, VIC, 3220, Australia
- Australian Institute for Musculoskeletal Science (AIMSS), The University of Melbourne, Parkville, Australia
- The Institute for Health and Ageing, Australian Catholic University, Melbourne, Australia
- Department of Medicine-Western Health, Melbourne Medical School, The University of Melbourne, Parkville, VIC, Australia
| | - M A Kotowicz
- Epi-Centre for Healthy Ageing (ECHA), IMPACT Strategic Research Centre, School of Medicine, Deakin University, PO Box 281, (Barwon Health), Geelong, VIC, 3220, Australia
- Department of Medicine-Western Health, Melbourne Medical School, The University of Melbourne, Parkville, VIC, Australia
- Barwon Health, Ryrie Street, Geelong, VIC, Australia
| | - A Sepetavc
- Epi-Centre for Healthy Ageing (ECHA), IMPACT Strategic Research Centre, School of Medicine, Deakin University, PO Box 281, (Barwon Health), Geelong, VIC, 3220, Australia
| | - J A Pasco
- Epi-Centre for Healthy Ageing (ECHA), IMPACT Strategic Research Centre, School of Medicine, Deakin University, PO Box 281, (Barwon Health), Geelong, VIC, 3220, Australia
- Department of Medicine-Western Health, Melbourne Medical School, The University of Melbourne, Parkville, VIC, Australia
- Barwon Health, Ryrie Street, Geelong, VIC, Australia
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Golds G, Houdek D, Arnason T. Male Hypogonadism and Osteoporosis: The Effects, Clinical Consequences, and Treatment of Testosterone Deficiency in Bone Health. Int J Endocrinol 2017; 2017:4602129. [PMID: 28408926 PMCID: PMC5376477 DOI: 10.1155/2017/4602129] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Accepted: 02/07/2017] [Indexed: 01/22/2023] Open
Abstract
It is well recognized that bone loss accelerates in hypogonadal states, with female menopause being the classic example of sex hormones affecting the regulation of bone metabolism. Underrepresented is our knowledge of the clinical and metabolic consequences of overt male hypogonadism, as well as the more subtle age-related decline in testosterone on bone quality. While menopause and estrogen deficiency are well-known risk factors for osteoporosis in women, the effects of age-related testosterone decline in men on bone health are less well known. Much of our knowledge comes from observational studies and retrospective analysis on small groups of men with variable causes of primary or secondary hypogonadism and mild to overt testosterone deficiencies. This review aims to present the current knowledge of the consequences of adult male hypogonadism on bone metabolism. The direct and indirect effects of testosterone on bone cells will be explored as well as the important differences in male osteoporosis and assessment as compared to that in females. The clinical consequence of both primary and secondary hypogonadism, as well as testosterone decline in older males, on bone density and fracture risk in men will be summarized. Finally, the therapeutic options and their efficacy in male osteoporosis and hypogonadism will be discussed.
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Affiliation(s)
- Gary Golds
- Department of Medicine, University of Saskatchewan, Saskatoon, SK, Canada S7N 0W8
| | - Devon Houdek
- Department of Medicine, University of Saskatchewan, Saskatoon, SK, Canada S7N 0W8
| | - Terra Arnason
- Division of Endocrinology and Metabolism, Department of Medicine, University of Saskatchewan, Saskatoon, SK, Canada S7N 0W8
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Lv L, Ge W, Liu Y, Lai G, Liu H, Li W, Zhou Y. Lysine-specific demethylase 1 inhibitor rescues the osteogenic ability of mesenchymal stem cells under osteoporotic conditions by modulating H3K4 methylation. Bone Res 2016; 4:16037. [PMID: 28058134 PMCID: PMC5192052 DOI: 10.1038/boneres.2016.37] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 08/24/2016] [Accepted: 08/24/2016] [Indexed: 12/24/2022] Open
Abstract
Bone tissue engineering may be hindered by underlying osteoporosis because of a decreased osteogenic ability of autologous seed cells and an unfavorably changed microenvironment in these patients. Epigenetic regulation plays an important role in the developmental origins of osteoporosis; however, few studies have investigated the potential of epigenetic therapy to improve or rescue the osteogenic ability of bone marrow mesenchymal stem cells (BMMSCs) under osteoporotic conditions. Here, we investigated pargyline, an inhibitor of lysine-specific demethylase 1 (LSD1), which mainly catalyzes the demethylation of the di- and mono-methylation of H3K4. We demonstrated that 1.5 mmol·L−1 pargyline was the optimal concentration for the osteogenic differentiation of human BMMSCs. Pargyline rescued the osteogenic differentiation ability of mouse BMMSCs under osteoporotic conditions by enhancing the dimethylation level of H3K4 at the promoter regions of osteogenesis-related genes. Moreover, pargyline partially rescued or prevented the osteoporotic conditions in aged or ovariectomized mouse models, respectively. By introducing the concept of epigenetic therapy into the field of osteoporosis, this study demonstrated that LSD1 inhibitors could improve the clinical practice of MSC-based bone tissue engineering and proposes their novel use to treat osteoporosis.
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Affiliation(s)
- Longwei Lv
- Department of Prosthodontics, Peking University School and Hospital of Stomatology , Beijing 100081, China
| | - Wenshu Ge
- Department of General Dentistry II, Peking University School and Hospital of Stomatology , Beijing 100081, China
| | - Yunsong Liu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology , Beijing 100081, China
| | - Guanyou Lai
- Department of Prosthodontics, Peking University School and Hospital of Stomatology , Beijing 100081, China
| | - Hao Liu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology , Beijing 100081, China
| | - Wenyue Li
- Department of Prosthodontics, Peking University School and Hospital of Stomatology , Beijing 100081, China
| | - Yongsheng Zhou
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China; National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing 100081, China
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Aslam MN, Jepsen KJ, Khoury B, Graf KH, Varani J. Bone structure and function in male C57BL/6 mice: Effects of a high-fat Western-style diet with or without trace minerals. Bone Rep 2016; 5:141-149. [PMID: 27350956 PMCID: PMC4920365 DOI: 10.1016/j.bonr.2016.05.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 04/21/2016] [Accepted: 05/11/2016] [Indexed: 12/29/2022] Open
Abstract
PURPOSE Osteoporosis occurs in both women and men, but most of what we know about the condition comes from studies in females. The present study examined bone structure and function over an 18-month period in male C57BL/6 mice maintained on either a rodent chow diet (AIN76A) or a high-fat, Western-style diet (HFWD). Effects of mineral supplementation were assessed in both diets. METHODS Trabecular and cortical bone structure in femora and vertebrae were assessed by micro-CT analysis. Following this, bone stiffness and strength measurements were made. Finally, bone levels of several cationic trace elements were quantified, and serum biomarkers of bone metabolism evaluated. RESULTS Bone loss occurred over time in both diets but was more rapid and extensive in mice on the HFWD. Dietary mineral supplementation reduced bone loss in both diets and increased bone stiffness in the femora and bone stiffness and strength in the vertebrae. Bone content of strontium was increased in response to mineral supplementation in both diets. CONCLUSIONS Bone loss was more severe in mice on the HFWD and mineral supplementation mitigated the effects of the HFWD. In comparison to previous findings with female C57BL/6 mice, the present studies indicate that males are more sensitive to diet and benefited from a healthy diet (AIN76A), while females lost as much bone on the healthy diet as on the HFWD. Male mice benefited from mineral supplementation, just as females did in the previous study.
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Affiliation(s)
| | - Karl J. Jepsen
- Department of Orthopaedic Surgery, The University of Michigan, Ann Arbor, MI 48109, USA
| | - Basma Khoury
- Department of Orthopaedic Surgery, The University of Michigan, Ann Arbor, MI 48109, USA
| | - Kristin H. Graf
- Department of Orthopaedic Surgery, The University of Michigan, Ann Arbor, MI 48109, USA
| | - James Varani
- Department of Pathology, The University of Michigan, Ann Arbor, MI 48109, USA
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Preparation of collagen/hydroxyapatite/alendronate hybrid hydrogels as potential scaffolds for bone regeneration. Colloids Surf B Biointerfaces 2016; 143:81-87. [DOI: 10.1016/j.colsurfb.2016.03.025] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 03/04/2016] [Accepted: 03/09/2016] [Indexed: 11/19/2022]
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Lee MY, Kim HY, Singh D, Yeo SH, Baek SY, Park YK, Lee CH. Metabolite Profiling Reveals the Effect of Dietary Rubus coreanus Vinegar on Ovariectomy-Induced Osteoporosis in a Rat Model. Molecules 2016; 21:149. [PMID: 26821009 PMCID: PMC6273122 DOI: 10.3390/molecules21020149] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 01/15/2016] [Accepted: 01/21/2016] [Indexed: 11/16/2022] Open
Abstract
The study was aimed at exploring the curative effects of Rubus coreanus (RC) vinegar against postmenopausal osteoporosis by using ovariectomized rats as a model. The investigations were performed in five groups: sham, ovariectomized (OVX) rats without treatment, low-dose RC vinegar (LRV)-treated OVX rats, high-dose RC vinegar (HRV)-treated OVX rats and alendronate (ALEN)-treated OVX rats. The efficacy of RC vinegar was evaluated using physical, biochemical, histological and metabolomic parameters. Compared to the OVX rats, the LRV and HRV groups showed positive effects on the aforementioned parameters, indicating estrogen regulation. Plasma metabolome analysis of the groups using gas chromatography-time of flight mass spectrometry (GC-TOF-MS) and ultra-performance liquid chromatography quadrupole-TOF-MS (UPLC-Q-TOF-MS) with multivariate analysis revealed 19 and 16 metabolites, respectively. Notably, the levels of butyric acid, phenylalanine, glucose, tryptophan and some lysophosphatidylcholines were marginally increased in RC vinegar-treated groups compared to OVX. However, the pattern of metabolite levels in RC vinegar-treated groups was found similar to ALEN, but differed significantly from that in sham group. The results highlight the prophylactic and curative potential of dietary vinegar against postmenopausal osteoporosis. RC vinegar could be an effective natural alternative for the prevention of postmenopausal osteoporosis.
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Affiliation(s)
- Mee Youn Lee
- Department of Bioscience and Biotechnology, Kon-Kuk University, Seoul 143-701, Korea.
| | - Hyang Yeon Kim
- Department of Bioscience and Biotechnology, Kon-Kuk University, Seoul 143-701, Korea.
| | - Digar Singh
- Department of Bioscience and Biotechnology, Kon-Kuk University, Seoul 143-701, Korea.
| | - Soo Hwan Yeo
- Fermented Food Science Division, Department of Agro-food Resource, National Academy of Agricultural Sciences, Rural Development Administration, Jeollabuk-do 565-851, Korea.
| | - Seong Yeol Baek
- Fermented Food Science Division, Department of Agro-food Resource, National Academy of Agricultural Sciences, Rural Development Administration, Jeollabuk-do 565-851, Korea.
| | - Yoo Kyoung Park
- Department of Medical Nutrition, Graduate School of East-West Medical Science, Kyung Hee University, Gyeonggi-do 446-791, Korea.
| | - Choong Hwan Lee
- Department of Bioscience and Biotechnology, Kon-Kuk University, Seoul 143-701, Korea.
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Oliveira CM, Alves SM, Pina MF. Marked socioeconomic inequalities in hip fracture incidence rates during the Bone and Joint Decade (2000–2010) in Portugal: age and sex temporal trends in a population based study. J Epidemiol Community Health 2016; 70:755-63. [DOI: 10.1136/jech-2015-206508] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 12/24/2015] [Indexed: 11/03/2022]
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The relevance of gender in the care of hip fracture patients. Int J Orthop Trauma Nurs 2015; 22:3-12. [PMID: 27215748 DOI: 10.1016/j.ijotn.2015.10.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 10/26/2015] [Accepted: 10/28/2015] [Indexed: 01/10/2023]
Abstract
As in many conditions, gender interplays with other social structures of inequality to impact upon women's and men's health and healthcare. This narrative review examines knowledge about sex, gender and hip fracture and suggests ways of highlighting the influence of gender in hip fracture healthcare. These will be considered in relation to two areas. Firstly the multifactorial dimension of hip fractures which identifies ethnicity, marital status, lifestyle, co-morbidities, environment in relation to falls and osteoporosis as important factors influencing the experience of hip fracture. Secondly the importance of acknowledging gender as a key element within research and management of care. Implications for practice are that we need a raised awareness of gender when we assess and care for patients, to ask critical questions about the gender bias in the evidence we use and reflect on how services and care practices may be biased towards gendered assumptions.
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Cun X, Xie J, Lin S, Fu N, Deng S, Xie Q, Zhong J, Lin Y. Gene profile of soluble growth factors involved in angiogenesis, in an adipose-derived stromal cell/endothelial cell co-culture, 3D gel model. Cell Prolif 2015; 48:405-12. [PMID: 26037311 DOI: 10.1111/cpr.12193] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Accepted: 03/05/2015] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVES The aim of this study was to investigate gene expressions of growth factors for angiogenesis, in a three-dimensional (3D) gel populated with adipose-derived stromal cells (ASCs) and endothelial cells (ECs) in co-culture. MATERIALS AND METHODS The 3D gel, mixed with green fluorescent protein (GFP)-positive ASCs and DsRed-Express-positive ECs, 1:1 ratio, was established in vitro. The phenomenon of angiogenesis was observed using confocal microscopy. To detect gene expressions for growth factor proteins in both ASCs and ECs, transwell co-culture was used, and cell lysate samples were collected at 1, 3, 5 and 7 days. Semi-quantitative polymerase chain reaction (PCR) was conducted to quantify mRNA expressions of the growth factors. RESULTS Angiogenesis was first observed in the gels by 7 days post-implantation. Over this time in ECs, genes coding for VEGFA/B, IGF-1, HIF-1α, FGF-1/-2 and BMP-5/-7 significantly increased. Meanwhile in ASCs, genes coding for VEGFA/B, IGF-1, HIF-1α, FGF-1/-2 and BMP-6 also were significantly enhanced. In particular, increased amounts of IGF-1 and HIF-1α in both ECs and ASCs were prominent relative to other factors. CONCLUSIONS Contact co-culture with ASCs and ECs at 1:1 ratio, in the 3D gel promoted angiogenesis; non-contact co-culture further confirmed gene expressions for growth factors, VEGFA/B, IGF-1, HIF-1α and FGF-1/-2 in both ASCs and ECs; BMP-5/-7 in ECs and BMP-6 in ASCs were also confirmed. This establishment of growth factor expression seemed to be responsible for enhancement of angiogenesis. This indicates that these factors could be utilized as targets for engineered angiogenesis.
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Affiliation(s)
- Xiangzhu Cun
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Jing Xie
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Shiyu Lin
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Na Fu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Shuwen Deng
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Qiang Xie
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Juan Zhong
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Yunfeng Lin
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
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