随着自然科学的日益进步，近十年来发展的科学技术已被广泛应用于越来越复杂的系统研究中，这使得人们更容易观察和操纵一些生命系统。这些研究进展也极大的促进了日益增多的材料科学和生物技术方面的研究成果在解决生物医学研究问题方面的应用。针对这些研究领域的迅速发展，Wiley于今年正式推出了Advanced Healthcare Materials期刊，作为目前材料和生命科学类期刊的一个有益的补充。Advanced Healthcare Materials和Biotechnology Journal联合编辑了一辑虚拟特刊，为广大读者朋友们带来生物医学材料领域的多学科研究方面的优秀研究成果！
Advanced Healthcare Materials是一个横跨多学科的材料科学期刊，旨在促进人类的健康。Wiley于2012年1月推出这一新的期刊，为广大科研工作者们带来了在药物传输系统、癌症治疗、组织工程，生物传感器和诊断工具、定制药物，生物电子学，可植入电子装置等方面的科学前沿领域的最新研究成果。Advanced Healthcare Materials的科学论文将于2013年12月31日前向所有读者们免费开放，如果您需申请免费的阅览权限，请登录Wiley Online Library’s New Journals Opt-In Page 获得更多信息，或者请与Advanced Healthcare Materials编辑部 ([email protected]) 联系。
Biotechnology Journal是一本广泛涵盖所有生物技术研究领域的科学期刊，每月出版一刊。该期刊对系统和合成生物学、纳米生物技术和医学研究尤为关注。Biotechnology Journal由Alois Jungbauer和Sang Yup Lee两位教授共同编辑，并分别在德国和中国设有编辑部。该期刊目前非官方的影响因子为2.6，ISI将于2013年正式公布其首个影响因子。
Advanced Healthcare Materials和Biotechnology Journal的编辑将于今年3月参加由DECHEMA (The German Society for Chemical Engineering and Biotechnology) 举办的两个国际会议——Nanomaterials and Biomedical Technologies 2012和3D Cell Culture 2012，这两个大会将与这一辑虚拟特刊的主题密切相关。如果您也将参加这两个大会并有兴趣与期刊编辑交流，或者您想咨询有关期刊和该虚拟特刊的问题，欢迎您随时与我们联系。
Alessandra Girotti, Alicia Fernández-Colino, Isabel M. López, José C. Rodríguez-Cabello, Francisco J. Arias
Biotechnol. J., DOI: 10.1002/biot.201100116
Elastin-like recombinamers (ELRs) are emerging as one of the leading protein-based biopolymers because of its many advantageous properties, such as biocompatibility, make these recombinant polymers suitable for use in numerous biomedical and nanotechnology application. In this review, the authors present recent progress in the biotechnological applications of ELRs and the most important genetic engineering-based strategies used in their biosynthesis.
Wenying Liu, Stavros Thomopoulos, Younan Xia
Adv. Healthcare Mater., DOI: 10.1002/adhm.201100021
This Progress Report reviews recent progress in applying electrospun nanofibers to the emerging field of regenerative medicine. Following a brief introduction to electrospinning, it discusses how scaffolds are fabricated from electrospun nanofibers with well-controlled compositions, structures, and alignments. It then highlights applications of the nanofiber-based scaffolds in four specific areas that involve nerves, dural tissues, tendons, and the tendon-to-bone insertion site, respectively.
Piergiorgio Gentile, Valeria Chiono, Chiara Tonda-Turo, Ana M. Ferreira, Gianluca Ciardelli
Biotechnol. J., DOI: 10.1002/biot.201100294
Guided bone regeneration (GBR) encourages bone regeneration through cellular exclusion and avoids the invasion of epithelial and connective tissues that grow at the defective site in place of bone tissue. The barrier membrane should satisfy various properties, such as biocompatibility, non-immunogenicity, non-toxicity, and a degradation rate that is long enough to permit mechanical support during bone formation. This review discusses various non-resorbable and resorbable commercially available membranes based on expanded polytetrafluoroethylene, poly(lactic acid), poly(glycolic acid) and their copolymers.
David W. Green, Gregory S. Watson, Jolanta Watson, Samuel J.K. Abraham
Adv. Healthcare Mater., DOI: 10.1002/adhm.201100039
New biomimetic materials and structures are needed in regenerative ophthalmology to orchestrate ocular tissue repair and reconstruction accurately, rapidly and completely. An alternative biomimicry approach is discussed in this Review, aimed at harnessing structures directly from nature that possess the right sets of features and functions to solve key problems in ophthalmology—such as regrowing retinal pigment epithelium on cicada wing derived New Biomimetic Directions nanostructures.
Biotechnol. J., DOI: 10.1002/biot.201100045
A therapeutic effect of hyperthermia on cancer has been documented; however, an optimized method of harnessing this property has yet been fully established. Magnetic-nanoparticle-mediated intracellular hyperthermia has the potential to achieve localized tumor heating. The technique consists of targeting magnetic nanoparticles to tumor tissue followed by application of an external alternating magnetic field that induces heat through Néel relaxation loss of the magnetic nanoparticles. This review describes recent clinical advances in magnetite nanoparticle-mediated hyperthermia.
Forrest M. Kievit, Miqin Zhang
Adv. Mater., DOI: 10.1002/adma.201102313
Cancer nanotheranostics seeks to improve cancer treatment by combining therapy with imaging through nanotechnology. Researchers are developing next-generation nanomedicines with multiple functionalities for bypassing biological barriers and targeted delivery of therapeutics to diseased cells in order to overcome current challenges in cancer therapy..
Birsen Demirbag, Pinar Y. Huri, Gamze T. Kose, Arda Buyuksungur, Vasif Hasirci
Biotechnol. J., DOI: 10.1002/biot.201100261
Tissue engineering refers to the in vitro culture of tissues and organs, and offers the promise of replacing worn/damaged body parts. There are three basic components to tissue engineering: cells, bioactive agents to induce cells to function, and scaffolds that house the cells and act as the substitute for the damaged tissue. The question “to scaffold or not to scaffold” is however, dependent on various parameters. In this review, with various examples (such as cartilage, bone and nerve regeneration), the authors provide a comprehensive review on cell-based therapies with or without scaffolds.
Chaoliang He, Xiuli Zhuang, Zhaohui Tang, Huayu Tian, Xuesi Chen
Adv. Healthcare Mater., DOI: 10.1002/adhm.201100008
Stimuli-sensitive polypeptide-based materials have recently received extensive attention. Polymeric materials, including micelles, vesicles, nanogels, and hydrogels, have been developed based on polypeptides with various structures and compositions. This Review focuses on recent intelligent polypeptide-based materials that have been designed and tested for controlled-delivery applications. In addition, the recent preparation of functionalized polypeptides is discussed.
Lihong Zhou, Guoyou Huang, Shuqi Wang, Jinhui Wu, Won Gu Lee, Yongmei Chen, Feng Xu, Tianjian Lu
Biotechnol. J., DOI: 10.1002/biot.201100098
Cell-based biosensors can be applied in environmental monitoring, drug screening as well as for clinical diagnostics. Compared to molecular-based biosensors, cell-based biosensors mimic physiological situations more closely, show enhanced specificity and sensitivity, and can detect unknown compounds and toxins. Current limitations include weak cell-substrate attachment, the 2D cell microenvironment, and limited shelf life. To address these limitations, one can encapsulate cells in hydrogels to provide a 3D environment, which can be combined with novel biomaterials and microtechnologies. In this review, the authors discuss the state of the art in hydrogel-based cell-based biosensor development and review remaining challenges as well as potential solutions to these problems.
Luc Gervais, Nico de Rooij, Emmanuel Delamarche
Adv. Mater., DOI: 10.1002/adma.201100464
Microfluidic devices for point-of-care diagnostics are being realized in response to a pressing need for diagnostic tests for diseases that are not covered by current technology. This Progress Report details the requirements of point- of-care diagnostics and the technological components that can be used to develop such microfluidic devices. Specifically, materials, surface treatments, sample processing, microfluidic elements (such as valves, pumps, and mixers), receptors, and analytes in the perspective of various biosensing concepts are addressed. Finally, the integration of components into accurate and reliable devices is discussed.
Chiara E. Ghezzi, Benedetto Marelli, Naser Muja, Nobuaki Hirota, James G. Martin, Jake E. Barralet, Antonio Alessandrino, Giuliano Freddi, Showan N. Nazhat
Biotechnol. J., DOI: 10.1002/biot.201100127
To engineer complex tissues, cells need to be incorporated into multilayed 3D scaffolds. These should not only be biocompatible, but also match the mechanical and degradation properties of the specific application. In this article, the authors report a three-layered scaffold consisting of an electrospun silk fibroin (SF) mat sandwiched between two dense collagen (DC) layers. The SF layer confers enhanced mechanical properties, while the DC layers create an extracellular matrix-like environment for mesenchymal stem cell growth. This easy technique to fabricate multilayered tissue engineering supports can be used for the regeneration of complex tissues.
Leon M. Bellan, Tatiana Kniazeva, Ernest S. Kim, Alla A. Epshteyn, Donald M. Cropek, Robert Langer, Jeffrey T. Borenstein
Adv. Healthcare Mater., DOI: 10.1002/adhm.201100052
A device containing a 3D microchannel network (fabricated using sacrificial melt-spun microfibers) sandwiched between lithographically patterned microfluidic channels offers improved delivery of soluble compounds to a large volume compared to a simple stack of two microfluidic channel layers. With this improved delivery ability comes an increased fluidic resistance due to the tortuous network of small-diameter channels.
Jose Umanzor-Alvarez, Emily C. Wade, Aliya Gifford, Kankowan Nontapot, Ariana Cruz-Reese, Tetsuya Gotoh, Jill C. Sible, Giti A. Khodaparast
Biotechnol. J., DOI: 10.1002/biot.201000205
Targeted delivery of materials to individual cells remains a challenge in nanoscience and nanomedicine. While manual microinjection is used for large cells, it is impractical in smaller dimensions and near infrared (NIR) laser injection may be a promising alternative. In this article, authors report the efficacy and toxicity of delivering quantum dots (QDs) into cells of Xenopus laevis embryos by NIR laser injection. This model system allows monitoring in living cells and a developing organism at the same time. Parameters for NIR pulses were identified that did not affect embryonic viability or morphology and delivered QDs as effectively as manual injection.
Tina Arbatan, Lizi Li, Junfei Tian, Wei Shen
Adv. Healthcare Mater., DOI: 10.1002/adhm.201100016
A liquid marble micro-bioreactor is used to conduct blood typing as a typical biological assay. This study portrays the potential of using such microreactors for biochemical and biological analysis.
Maren Drewitz, Marianne Helbling, Nicole Fried, Manuela Bieri, Wolfgang Moritz, Jan Lichtenberg, Jens M. Kelm
Biotechnol. J., DOI: 10.1002/biot.201100290
Although it is widely recognized that 2D cell cultures do not reflect the physiological environment of cells in native tissues, 3D culture systems are not commonly used in pre-clinical drug testing. This is mostly due to a lack of automated high-throughput systems for 3D cultivation. In this article, authors show the robustness of spherical microtissues (multicellular spheroids) production and drug testing in a 96-well hanging-drop multiwell plate format, on a standard 96-well channel robotic platform.
Haifa Shen, Jian You, Guodong Zhang, Arturas Ziemys, Qingpo Li, Litao Bai, Xiaoyong Deng, Donald R. Erm, Xuewu Liu, Chun Li, Mauro Ferrari
Adv. Healthcare Mater., DOI: 10.1002/adhm.201100005
Hollow gold nanoshels are more efficient in heat generation triggered by near infrared laser when they are loaded into porous silicon particles, which results in effective cancer-cell killing in vitro and in vivo. Collective electromagnetic coupling of nanoconfined hollow gold nanoshells leads to dramatic enhancement of thermal ablation.
Pelagia Glampedaki, Victoria Dutschk, Dragan Jocic, Marijn M.C.G. Warmoeskerken
Biotechnol. J., DOI: 10.1002/biot.201100115
All functionalization procedures of polyester textiles face the same challenge: how to functionalize a material with very low chemical reactivity? In this article, the authors propose a microgel-based functionalization method applicable to polyester textiles for improving their hydrophilicity and/or moisture-management properties. Advantages of this new technique are the extended pH responsiveness of the polyester surface as well as thermoresponsiveness at a temperature close to the average human body temperature, which creates new applications for functionalized polyester in biomedicine and protective clothing
Dingbin Liu, Wenwen Chen, Yue Tian, Sha He, Wenfu Zheng, Jiashu Sun, Zhuo Wang, Xingyu Jiang
Adv. Healthcare Mater., DOI: 10.1002/adhm.201100002
A highly sensitive, selective, and dual-readout (colorimetric and fluorometric) assay for acetylcholinesterase (AChE) based on Rhodamine B-modified gold nanoparticle is reported. Due to its good sensitivity and selectivity, the assay can be used for monitoring AChE levels in the cerebrospinal fluid of transgenic mice with Alzheimer’s disease.
Francesko Antonio, Rocasalbas Guillem, Touriño Sonia, Mattu Clara, Gentile Piergiorgio, Chiono Valeria, Ciardelli Gianluca, Tzanko Tzanov
Biotechnol. J., DOI: 10.1002/biot.201100194
Chronic wounds arise from a biochemical imbalance during the accurate wound healing phase. Collagen-based constructs are employed as dressings for wound repair – these materials adhere well to the wounds, and support the formation of new granulation tissue and epithelium at the wound site; however, the ability of collagen to maintain its physical and chemical integrity in biological fluids with increased collagenolytic activity, such as in the case of chronic wounds, is rather low. In this article, the authors report a collagen-based, sponge-like wound dressing material with improved mechanical performance and proteolytic stability through cross-linking with genipin. The cross-linked sponges were further loaded with polyphenolic extracts to stimulate the healing process by addressing the biochemical imbalance in chronic wounds.
Aurélie Jean, George C. Engelmayr Jr.
Adv. Healthcare Mater., DOI: 10.1002/adhm.201100017
Anisotropic collagen fibrillogenesis is demonstrated within the pores of an accordion-like honeycomb poly(glycerol sebacate) tissue engineering scaffold. Confocal reflectance microscopy and image analysis demonstrate increased fibril distribution order, fibril density, and alignment in accordion-like honeycomb pores compared with collagen gelled unconstrained. Finite element modeling predicts how collagen gel and scaffold mechanics couple in matching native heart muscle stiffness and anisotropy.