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实现组织工程中多种生长因子的递送。

Toward delivery of multiple growth factors in tissue engineering.

机构信息

Department of Periodontology & Oral Medicine, School of Stomatology, Fourth Military Medical University, Xi'an 710032, Shaanxi, People's Republic of China.

出版信息

Biomaterials. 2010 Aug;31(24):6279-308. doi: 10.1016/j.biomaterials.2010.04.053. Epub 2010 May 21.

Abstract

Inspired by physiological events that accompany the "wound healing cascade", the concept of developing a tissue either in vitro or in vivo has led to the integration of a wide variety of growth factors (GFs) in tissue engineering strategies in an effort to mimic the natural microenvironments of tissue formation and repair. Localised delivery of exogenous GFs is believed to be therapeutically effective for replication of cellular components involved in tissue development and the healing process, thus making them important factors for tissue regeneration. However, any treatment aiming to mimic the critical aspects of the natural biological process should not be limited to the provision of a single GF, but rather should release multiple therapeutic agents at an optimised ratio, each at a physiological dose, in a specific spatiotemporal pattern. Despite several obstacles, delivery of more than one GF at rates mimicking an in vivo situation has promising potential for the clinical management of severely diseased tissues. This article summarises the concept of and early approaches toward the delivery of dual or multiple GFs, as well as current efforts to develop sophisticated delivery platforms for this ambitious purpose, with an emphasis on the application of biomaterials-based deployment technologies that allow for controlled spatial presentation and release kinetics of key biological cues. Additionally, the use of platelet-rich plasma or gene therapy is addressed as alternative, easy, cost-effective and controllable strategies for the release of high concentrations of multiple endogenous GFs, followed by an update of the current progress and future directions of research utilising release technologies in tissue engineering and regenerative medicine.

摘要

受伴随“伤口愈合级联反应”的生理事件启发,无论是在体外还是体内开发组织的概念,都促使人们将各种各样的生长因子(GFs)整合到组织工程策略中,以模拟组织形成和修复的自然微环境。局部递送外源性 GFs 被认为在复制组织发育和愈合过程中涉及的细胞成分方面具有治疗效果,因此它们是组织再生的重要因素。然而,任何旨在模拟自然生物过程关键方面的治疗都不应仅限于提供单一 GF,而应按照优化的比例、每个 GF 以生理剂量、在特定的时空模式下释放多种治疗剂。尽管存在一些障碍,但以模拟体内情况的速度递送两种或多种 GFs 具有很大的潜力,可用于严重疾病组织的临床管理。本文总结了双重或多种 GFs 递送的概念和早期方法,以及为实现这一雄心勃勃的目标开发复杂递送平台的当前努力,重点介绍了基于生物材料的部署技术的应用,这些技术允许对关键生物信号进行空间控制和释放动力学。此外,还讨论了富血小板血浆或基因治疗作为释放多种内源性 GFs 的替代方法,其具有简单、经济高效和可控的特点,随后介绍了在组织工程和再生医学中利用释放技术的当前进展和未来研究方向。

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