JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
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2018
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IF 1.911
Junxia Yu,Huantong Su,Shuda Wei,Fangping Chen,Changsheng Liu
Blood coagulates are closely related to calcium ions (coagulation factor IV), and calcium-doped biomaterials have been reported to be effective in hemostasis. However, the effects exerted by calcium on hemostatic agents have not been previously investigated. The aims of this work were to develop calcium-modified oxidized microporous starch (CaOMS) with controllable calcium contents and to explore the relationship between calcium content and hemostatic effects. The results showed that low calcium content promoted coagulation, while high calcium content inhibited coagulation. CaOMS3 with 2.2 mg/g calcium content was optimal because of its excellent water absorption performance that enhanced physical coagulation, the rapid initiation of coagulation cascade reactions, and the enhanced chemical coagulation by RBC aggregation and platelet activation. The synergistic effects of chemical activation and physical absorption endowed CaOMS with the potential to control internal organ bleeding. These results suggested that CaOMS may be a promising hemostatic agent with wide spread applications.
研究领域:
生物医学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2022
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IF 10.753
Ling Long,Yimeng Zhao,Guojun Lv,Yin Duan,Xiaobo Liu,Xuguang Jiang
Municipal solid waste incineration fly ash (MSWI FA) is categorized as a hazardous waste , which demands environmentally acceptable treatment due to its easy leachability toxic of heavy metals. This study investigated an innovative and improved method for stabilization/solidification (S/S) of MSWI FA with coal gangue based geopolymer by the addition of active calcium content . The specimen with addition of calcium oxide up to 10 % reached the compressive strength of 2.14 MPa at 28 d. The addition of 30 % calcium oxide resulted in the highest immobilization efficiencies of Cd (98.96 %) and Pb (99.19 %). X-ray Diffraction (XRD), Fourier Transform Infrared Spectrometry (FTIR), Scanning Electron Microscope (SEM), and thermogravimetric (TG) analysis indicated the generation of calcium-containing hydration products was promoted after the improvement of calcium content in binder. Heavy metals were stabilized through the chemical adsorption and ions exchange of amorphous hydration products. On the whole, this study illustrated that the incorporation of active calcium content can improve efficiently S/S of hazardous ash waste such as MSWI FA.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Experimental and Therapeutic Medicine
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2019
·Vol. 17
·期 5
·3891-3898
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IF 1.448
Yuan‑Jun Xia,Wang Wei,Hong Xia,Qing‑Shui Ying,Xiang Yu,Li‑Hua Li,Jian‑Hua Wang,Ying Zhang
In the present study, the effect of recombinant human bone morphogenetic protein‑2 (rhBMP‑2) delivered by chitosan (CS) microspheres on ectopic osteogenesis was investigated in a rat model. rhBMP‑2‑loaded CS microspheres and blank CS microspheres were prepared. A total of 24 male Sprague Dawley rats were divided into 4 groups with 6 rats in each group: The CS/rhBMP‑2 group, the rhBMP‑2 group, in which rhBMP‑2 was directly implanted (rhBMP‑2 dose in either group, 1 mg), the CS blank group and the control group. X‑ray was performed at 4 weeks after ectopic osteogenesis surgery and micro‑computed tomography (CT) examination was scheduled at 1, 2, 3 and 4 weeks after the surgery to determine ectopic osteogenesis in the different groups. Histological analysis, and determination of alkaline phosphatase (ALP) activity and calcium content were also performed. The mean diameter of the osteoid tissues was 1.1±0.3 cm (range, 0.8‑1.4 cm) in the CS/rhBMP‑2 group, which was significantly bigger than that in the rhBMP‑2 group (0.3±0.1 cm; range, 0.1‑0.4 cm) at 4 weeks after the surgery. X‑ray analysis and micro‑CT scan indicated that the area of high‑density tissues and the radionuclide intensity, as well as bone volume in the 3‑dimensional reconstruction were greatest in the CS/rhBMP‑2 group, followed by those in the rhBMP‑2 group. All parameters, including bone mineral density, tissue mineral density, tissue mineral content and bone volume fraction, were significantly higher in the CS/rhBMP‑2 group at 3 and 4 weeks after the surgery, compared with those in the rhBMP‑2 group. The histological analysis, ALP activity analysis and determination of calcium content revealed that the CS/rhBMP‑2 system had the greatest ability to induce osteoblast differentiation. In conclusion, the CS/rhBMP‑2 microsphere delivery system significantly enhanced the induction and promotion effects of rhBMP‑2 regarding ectopic osteogenesis. The present study enhances the basic data available for future application of the CS/rhBMP‑2 microspheres delivery system and provides a deeper understanding of the role of BMP‑2 in bone regeneration.
研究领域:
生物材料
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骨再生
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组织工程
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骨科
✓ 已验证
DOI
PubMed
高影响因子
Open Medicine
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2023
·Vol. 18
·期 1
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IF 2.1
Haibin Li,Chunyan Zhang,Qiang Liu
Adverse cardiovascular events are associated with vascular calcification (VC) process, where vascular smooth muscle cells (VSMCs) differentiate into osteoblastic phenotype and deposit hydroxyapatite crystals. Microtubule-associated protein kinesin family member 2C (KIF2C) expression is decreased obviously in VSMC during calcification induction. Accordingly, we investigate the role and potential mechanism of KIF2C on VSMC calcification. The effects of β-glycerophosphate (β-GP)/KIF2C/lumican (LUM) on calcification, calcium content, alkaline phosphatase (ALP) activity, calcification-related markers, Tubulin, the ratio of polymerized (Po) to free (Fr) tubulin, as well as levels of LUM, apolipoprotein B (APOB), and KIF2C were assessed by Alizarin red S staining, calcium assay kit, ALP assay kit, Western blot, immunofluorescence, and quantitative real-time PCR. The interplay between LUM and APOB was estimated using co-immunoprecipitation and immunofluorescence. As a result, β-GP promoted calcification of human VMSCs (HVMSCs) and repressed KIF2C expression. KIF2C overexpression reversed the effect of β-GP on HVSMCs. LUM silencing attenuated β-GP-induced promotion on HVSMC calcification and increased KIF2C expression by interacting with APOB. Collectively, LUM silencing can alleviate β-GP-induced VSMC calcification through mitigating the repression of APOB on KIF2C expression.
研究领域:
心血管疾病
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细胞生物学
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分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED POWDER TECHNOLOGY
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2020
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IF 4.217
Weihan Xie,Xueying Chen,Yuli Li,Guohou Miao,Gang Wang,Ting Tian,Lei Zeng,Xiaofeng Chen
A novel uniform monodispersed radial mesoporous bioactive glass nanosphere (MBG) with high phosphorus and calcium content has been successfully synthesized. The synthesis was first taken place in a cyclohexane-water biphasic stratification reaction system, which fabricated the radial mesoporous SiO 2 -P 2 O 5 nanosphere (SPN) using hexadecyltrimethyl ammonium bromide (CTAB) as a template agent and triethanolamine (TEA) as a hydrolysis catalyst. Solid reactions were then carried out to synthesize SiO 2 -CaO-P 2 O 5 MBG using SPN as both the silicon source and phosphorus source, and Ca(NO 3 ) 2 as the calcium source. The prepared MBG not only displayed the radial structure and high specific surface area (~321 m 2 /g), but also had high phosphorus and calcium content. The results of energy dispersive spectrometer (EDS) demonstrated that P 2 O 5 content was enhanced by properly increasing the reaction temperature. The in vitro bioactivity test showed that MBG had an excellent ability of inducing apatite formation. Furthermore, the MBG showed excellent biocompatibility at a low concentration of 50–100 μg/mL in vitro, and it would have a promising prospect as drug delivery system for bone tissue regeneration.
研究领域:
材料科学
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生物材料
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生物医学工程
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产品关联
DOI
高影响因子
Parasites & Vectors
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2021
·Vol. 14
·期 1
·1-10
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IF 3.876
Gao Hai-Jun,Sun Xu-Dong,Luo Yan-Ping,Pang Hua-Sheng,Ma Xing-Ming,Zhang Ting,Jing Tao,Hu Wei,Shen Yu-Juan,Cao Jian-Ping
Background Echinococcosis, which is caused by the larvae of cestodes of the genus Echinococcus , is a parasitic zoonosis that poses a serious threat to the health of humans and animals globally. Albendazole is the drug of choice for the treatment of echinococcosis, but it is difficult to meet clinical goals with this chemotherapy due to its low cure rate and associated side effects after its long-term use. Hence, novel anti-parasitic targets and effective treatment alternatives are urgently needed. A previous study showed that verapamil (Vepm) can suppress the growth of Echinococcus granulosus larvae; however, the mechanism of this effect remains unclear. The aim of the present study was to gain insight into the anti-echinococcal effect of Vepm on Echinococcus with a particular focus on the regulatory effect of Vepm on calcium/calmodulin-dependent protein kinase II (Ca 2+ /CaM-CaMKII) in infected mice. Methods The anti-echinococcal effects of Vepm on Echinococcus granulosus protoscoleces (PSC) in vitro and Echinococcus multilocularis metacestodes in infected mice were assessed. The morphological alterations in Echinococcus spp. induced by Vepm were observed by scanning electron microscopy (SEM), and the changes in calcium content in both the parasite and mouse serum and liver were measured by SEM-energy dispersive spectrometry, inductively coupled plasma mass spectrometry and alizarin red staining. Additionally, the changes in the protein and mRNA levels of CaM and CaMKII in infected mice, and in the mRNA levels of CaMKII in E. granulosus PSC, were evaluated after treatment with Vepm by immunohistochemistry and/or real-time quantitative polymerase chain reaction. Results In vitro , E. granulosus PSC could be killed by Vepm at a concentration of 0.5 μg/ml or higher within 8 days. Under these conditions, the ultrastructure of PSC was damaged, and this damage was accompanied by obvious calcium loss and downregulation of CaMKII mRNA expression. In vivo , the weight and the calcium content of E. multilocularis metacestodes from mice were reduced after treatment with 40 mg/kg Vepm, and an elevation of the calcium content in the sera and livers of infected mice was observed. In addition, downregulation of CaM and CaMKII protein and mRNA expression in the livers of mice infected with E. multilocularis metacestodes was found after treatment with Vepm. Conclusions Vepm exerted a parasiticidal effect against Echinococcus both in vitro and in vivo through downregulating the expression of Ca 2+ /CaM-CaMKII, which was over-activated by parasitic infection. The results suggest that Ca 2+ /CaM-CaMKII may be a novel drug target, and that Vepm is a potential anti-echinococcal drug for the future control of echinococcosis. Graphical Abstract
研究领域:
寄生虫学
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药理学
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分子生物学
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传染病学
✓ 已验证
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
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2022
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IF 11.322
Kailei Ding,Cheng Zheng,Xueyu Huang,Li Yang,Yang Lei,Yunbing Wang
Bioprosthetic heart valve thrombosis (BHVT) is no longer considered a rare clinical entity in recent years and could cause valve motion abnormalities, which requires reoperation. Currently reported modifications of bioprosthetic heart valves (BHVs) mainly focused on improving the anti-calcification property. However, it was hard to improve their anti-thrombogenicity and crosslinking efficiency at the same time. Here we reported a method that combines improved hemocompatibility , crosslinking efficiency, cytocompatibility, and anti-calcification property for BHVs. Porcine pericardia (PPs) and 2-amino-4-pentanoic acid (APA) were first co-crosslinked with glutaraldehyde to introduce allyl moieties to the PPs, then poly(N, N-dimethylacrylamide) (PDMAA) was covalently immobilized on PPs through radical polymerization . In vitro and in vivo studies demonstrated that the structural stability of PDMAA modified PPs was much superior than that of traditional glutaraldehyde crosslinked PPs (GA). The PDMAA modified PPs exhibited enhanced antithrombogenic performance with a 75% decrease of platelet adhesion compared with GA. Moreover, the calcium content accumulated on the modified PPs after 90-day rat subcutaneous implantation decreased 93.5% compared with that on GA. The PDMAA modified PPs may alleviate BHVT and calcification, offering a potential option for BHVs fabrication in the future.
研究领域:
生物材料
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组织工程
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心血管医学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）