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Collagen-Elastin-Like Polypeptide-Bioglass Scaffolds for Guided Bone Regeneration.

胶原-弹性蛋白样多肽-生物玻璃支架用于引导骨再生。

  • 影响因子:5.97
  • DOI:10.1002/adhm.201901385
  • 作者列表:"Gurumurthy B","Tucci MA","Fan LW","Benghuzzi HA","Pal P","Bidwell GL","Salazar Marocho SM","Cason Z","Gordy D","Janorkar AV
  • 发表时间:2020-01-27
Abstract

:The goals of this study are to evaluate the ability of the multicomponent collagen-elastin-like polypeptide (ELP)-Bioglass scaffolds to support osteogenesis of rat mesenchymal stem cells (rMSCs), demonstrate in vivo biocompatibility by subcutaneous implantation in Sprague-Dawley rats, monitor degradation noninvasively, and finally assess the scaffold's ability in healing critical-sized cranial bone defects. The collagen-ELP-Bioglass scaffold supports the in vitro osteogenic differentiation of rMSCs over a 3 week culture period. The cellular (rMSC-containing) or acellular scaffolds implanted in the subcutaneous pockets of rats do not cause any local or systemic toxic effects or tumors. The real-time monitoring of the fluorescently labeled scaffolds by IVIS reveals that the scaffolds remain at the site of implantation for up to three weeks, during which they degrade gradually. Micro-CT analysis shows that the bilateral cranial critical-sized defects created in rats lead to greater bone regeneration when filled with cellular scaffolds. Bone mineral density and bone microarchitectural parameters are comparable among different scaffold groups, but the histological analysis reveals increased formation of high-quality mature bone in the cellular group, while the acellular group has immature bone and organized connective tissue. These results suggest that the rMSC-seeded collagen-ELP-Bioglass composite scaffolds can aid in better bone healing process.

摘要

: 本研究的目的是评价多组分胶原弹性蛋白样多肽 (ELP) 生物玻璃支架支持大鼠间充质干细胞 (rMSCs) 成骨的能力, 通过 Sprague-Dawley 大鼠皮下植入证明体内生物相容性,无创监测降解,最终评估支架愈合临界大小颅骨缺损的能力。胶原-ELP-生物玻璃支架支持 rMSCs 在 3 周培养期间的体外成骨分化。植入大鼠皮下口袋的细胞 (含 rMSC) 或无细胞支架不会引起任何局部或全身毒性作用或肿瘤。IVIS 对荧光标记支架的实时监测发现,支架在植入部位停留长达三周,在此期间逐渐降解。Micro-CT 分析显示,大鼠双侧颅骨临界大小的缺损在填充细胞支架时导致更大的骨再生。骨密度和骨微结构参数在不同支架组之间具有可比性,但组织学分析显示细胞组中高质量成熟骨形成增加, 而脱细胞组则有未成熟骨和有组织的结缔组织。这些结果表明,rMSC 种子胶原-ELP-生物玻璃复合支架可以帮助更好的骨愈合过程。

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影响因子:3.59
发表时间:2020-01-29
来源期刊:Food & function
DOI:10.1039/c9fo01817d
作者列表:["Galán MG","Weisstaub A","Zuleta A","Drago SR"]

METHODS::Apparent calcium absorption, total bone mineral content and density, and mineral contents of the right femur were studied using a growing rat model. Twenty-four male Wistar rats were fed with diets based on extruded whole grain red (RSD) or white sorghum (WSD), and control diet (CD) up to 60 days. The animals fed with sorghum diets consumed less and gained less weight compared to those fed with CD, but the efficiency of all diets was similar. Calcium intake was lower in animals fed with sorghum diets, related to the lower total intake of these animals. Apparent calcium absorption in animals fed with RSD was lower than in those fed with CD (CD: 72.7%, RSD: 51.0%, WSD: 64.8%). No significant differences in bone mineral density of total body, spin, femur, distal femur, tibia and proximal tibia were observed among the groups. However, Ca and P contents in the right femur of the rats consuming RSD were lower, indicating a certain imbalance in the metabolism of these minerals.

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影响因子:1.50
发表时间:2020-01-24
来源期刊:Skeletal radiology
DOI:10.1007/s00256-020-03378-z
作者列表:["Schaffler-Schaden D","Kneidinger C","Schweighofer-Zwink G","Flamm M","Iglseder B","Pirich C"]

METHODS:OBJECTIVE:Controversy exists about the impact of bone mineral density (BMD) and fracture risk in newly diagnosed patients with breast cancer (BC). It is presumed that there are differences in BMD between women with BC and healthy controls. BMD is therefore considered as a potential marker to predict BC risk. This study was conducted to investigate the association of BMD, trabecular bone score (TBS) and fracture risk in younger postmenopausal women with hormone responsive BC. METHODS:Overall, 343 women were examined. Women with BC were matched to a control group of the general population. Forty-nine women and fifty-nine controls were included in the final analysis. All subjects underwent dual energy x-ray absorptiometry (DXA) of the lumbar spine, femoral neck, and the total hip to evaluate bone mineral density. The 10-year fracture risk for a major osteoporotic fracture was assessed using the FRAX-score and the TBS-adjusted FRAX-Score, respectively. RESULTS:Lumbar and femoral neck BMD were similar in BC patients and controls. No difference was found for TBS of the spine (1.38 ± 0.1 vs.1.36 ± 0.09) in the BC and the control group, respectively (p = 0.19). The 10- year probability for a major osteoporotic fracture (MoF) or femoral neck (FN) fracture was 6.1 (± 2.6%) and 0.9 (± 1.2%) in the BC group vs. 6.7 (± 3.5%) (p = 0.33) and 0.9 (± 1.1%) (p = 0.73) in the control group. CONCLUSION:Postmenopausal women younger than 60 years with breast cancer do not show any differences in baseline BMD, TBS, or TBS adjusted FRAX in comparison to controls.

翻译标题与摘要 下载文献
影响因子:5.97
发表时间:2020-01-27
DOI:10.1002/adhm.201901385
作者列表:["Gurumurthy B","Tucci MA","Fan LW","Benghuzzi HA","Pal P","Bidwell GL","Salazar Marocho SM","Cason Z","Gordy D","Janorkar AV"]

METHODS::The goals of this study are to evaluate the ability of the multicomponent collagen-elastin-like polypeptide (ELP)-Bioglass scaffolds to support osteogenesis of rat mesenchymal stem cells (rMSCs), demonstrate in vivo biocompatibility by subcutaneous implantation in Sprague-Dawley rats, monitor degradation noninvasively, and finally assess the scaffold's ability in healing critical-sized cranial bone defects. The collagen-ELP-Bioglass scaffold supports the in vitro osteogenic differentiation of rMSCs over a 3 week culture period. The cellular (rMSC-containing) or acellular scaffolds implanted in the subcutaneous pockets of rats do not cause any local or systemic toxic effects or tumors. The real-time monitoring of the fluorescently labeled scaffolds by IVIS reveals that the scaffolds remain at the site of implantation for up to three weeks, during which they degrade gradually. Micro-CT analysis shows that the bilateral cranial critical-sized defects created in rats lead to greater bone regeneration when filled with cellular scaffolds. Bone mineral density and bone microarchitectural parameters are comparable among different scaffold groups, but the histological analysis reveals increased formation of high-quality mature bone in the cellular group, while the acellular group has immature bone and organized connective tissue. These results suggest that the rMSC-seeded collagen-ELP-Bioglass composite scaffolds can aid in better bone healing process.

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