聚乳酸-共-乙醇酸网涂覆纤维蛋白或胶原蛋白和生物黏附物质作为预制的、可降解的、生物相容性的和功能性的膀胱壁再生支架。

Polylactic-co-glycolic acid mesh coated with fibrin or collagen and biological adhesive substance as a prefabricated, degradable, biocompatible, and functional scaffold for regeneration of the urinary bladder wall.

机构信息

Department of Surgery, UKM Medical Centre, Kuala Lumpur, Malaysia.

出版信息

J Biomed Mater Res A. 2013 Aug;101(8):2237-47. doi: 10.1002/jbm.a.34518. Epub 2013 Jan 24.

Abstract

The chief obstacle for reconstructing the bladder is the absence of a biomaterial, either permanent or biodegradable, that will function as a suitable scaffold for the natural process of regeneration. In this study, polylactic-co-glycolic acid (PLGA) plus collagen or fibrin was evaluated for its suitability as a scaffold for urinary bladder construct. Human adipose-derived stem cells (HADSCs) were cultured, followed by incubation in smooth muscle cells differentiation media. Differentiated HADSCs were then seeded onto PLGA mesh supported with collagen or fibrin. Evaluation of cell-seeded PLGA composite immersed in culture medium was performed under a light and scanning microscope. To determine if the composite is compatible with the urodynamic properties of urinary bladder, porosity and leaking test was performed. The PLGA samples were subjected to tensile testing was pulled until PLGA fibers break. The results showed that the PLGA composite is biocompatible to differentiated HADSCs. PLGA-collagen mesh appeared to be optimal as a cell carrier while the three-layered PLGA-fibrin composite is better in relation to its leaking/ porosity property. A biomechanical test was also performed for three-layered PLGA with biological adhesive and three-layered PLGA alone. The tensile stress at failure was 30.82 ± 3.80 (MPa) and 34.36 ± 2.57 (MPa), respectively. Maximum tensile strain at failure was 19.42 ± 2.24 (mm) and 23.06 ± 2.47 (mm), respectively. Young's modulus was 0.035 ± 0.0083 and 0.043 ± 0.012, respectively. The maximum load at break was 58.55 ± 7.90 (N) and 65.29 ± 4.89 (N), respectively. In conclusion, PLGA-Fibrin fulfils the criteria as a scaffold for urinary bladder reconstruction.

摘要

重建膀胱的主要障碍是缺乏一种生物材料,无论是永久性的还是可生物降解的,它可以作为自然再生过程的合适支架。在这项研究中,聚乳酸-共-羟基乙酸(PLGA)加胶原或纤维蛋白被评估为用于构建膀胱的支架的适用性。培养人脂肪源性干细胞(HADSCs),然后在平滑肌细胞分化培养基中孵育。然后将分化的 HADSCs 接种到 PLGA 网格上,网格上支撑有胶原或纤维蛋白。在光镜和扫描显微镜下评估浸入培养基中的细胞接种的 PLGA 复合材料。为了确定复合材料是否与膀胱的尿动力学特性兼容,进行了孔隙率和渗漏测试。对 PLGA 样品进行拉伸测试,直到 PLGA 纤维断裂。结果表明,PLGA 复合材料对分化的 HADSCs 具有生物相容性。PLGA-胶原网似乎是最佳的细胞载体,而三层 PLGA-纤维蛋白复合材料在渗漏/孔隙率方面更好。还对具有生物粘合剂的三层 PLGA 和单独的三层 PLGA 进行了生物力学测试。失效时的拉伸应力分别为 30.82 ± 3.80(MPa)和 34.36 ± 2.57(MPa)。失效时的最大拉伸应变分别为 19.42 ± 2.24(mm)和 23.06 ± 2.47(mm)。杨氏模量分别为 0.035 ± 0.0083 和 0.043 ± 0.012。断裂时的最大负载分别为 58.55 ± 7.90(N)和 65.29 ± 4.89(N)。总之,PLGA-纤维蛋白满足作为膀胱重建支架的标准。

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