Gangrade Ankit, Mandal Biman B
Biomaterial and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
ACS Biomater Sci Eng. 2019 May 13;5(5):2365-2381. doi: 10.1021/acsbiomaterials.9b00416. Epub 2019 Apr 16.
The major limitations of traditional methods of anticancer drug delivery include systemic distribution and frequent administration intravenously. To address these issues, in our present approach, we have fabricated a nano hybrid silk hydrogel system for localized, targeted, and on-demand delivery of anticancer drugs. The hybrid system contains a blend of two varieties of silk protein and doxorubicin (DOX)-loaded folic acid functionalized single-walled carbon nanotubes (SWCNT-FA/DOX). Owing to the single-walled carbon nanotube (SWCNT) incorporation, the mechanical strength of the hybrid silk hydrogel composite enhanced significantly. A slow and sustained DOX release was recorded over a 14 day study. The amount of DOX released was determined by concentration of the SWCNT-FA/DOX payload, rate of silk degradation, pH of the released medium, and incubation temperature. The intermittent exposure of near-infrared light to the hybrid gel system stimulated on-demand DOX release. The studies demonstrated the active targeting of SWCNT-FA/DOX to folic acid receptor-positive (FR) cancer cells. The silk hydrogel, being viscoelastic in nature, is easily injectable to the targeted site. Hence, the developed silk hybrid gel system may allow its near or intratumoral implantation, where it may act as a depot for anticancer drug-loaded nanoparticles. The sustained, targeted, and external-stimuli-dependent DOX released at the localized tumor site is expected to reduce its systemic side effects and show an efficient way to treat the cancer.
传统抗癌药物递送方法的主要局限性包括全身分布和频繁静脉给药。为了解决这些问题,在我们目前的方法中,我们制备了一种纳米混合丝水凝胶系统,用于局部、靶向和按需递送抗癌药物。该混合系统包含两种丝蛋白以及负载阿霉素(DOX)的叶酸功能化单壁碳纳米管(SWCNT-FA/DOX)的混合物。由于掺入了单壁碳纳米管(SWCNT),混合丝水凝胶复合材料的机械强度显著提高。在为期14天的研究中记录到阿霉素的缓慢持续释放。阿霉素的释放量由SWCNT-FA/DOX负载量、丝降解速率、释放介质的pH值和孵育温度决定。近红外光对混合凝胶系统的间歇性照射刺激了按需阿霉素释放。研究证明了SWCNT-FA/DOX对叶酸受体阳性(FR)癌细胞的主动靶向作用。丝水凝胶本质上具有粘弹性,易于注射到靶向部位。因此,所开发的丝混合凝胶系统可能允许其在肿瘤附近或瘤内植入,在那里它可以作为负载抗癌药物的纳米颗粒的储存库。预计在局部肿瘤部位持续、靶向和依赖外部刺激释放的阿霉素将减少其全身副作用,并显示出一种有效的癌症治疗方法。
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