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Co-Delivery of Hydrophobic and Hydrophilic Drugs from Nanoparticle–Aptamer Bioconjugates
Zhang, Liangfang,Radovic-Moreno, Aleksandar F.,Alexis, Frank,Gu, Frank X.,Basto, Pamela A.,Bagalkot, Vaishali,Jon, Sangyong,Langer, Robert S.,Farokhzad, Omid C. WILEY-VCH Verlag 2007 ChemMedChem Vol.2 No.9
<B>Graphic Abstract</B> <P>Herein we report a novel targeted drug delivery system consisting of nanoparticle–aptamer bioconjugates, which can carry both hydrophobic and hydrophilic chemotherapeutic drugs simultaneously, and deliver them selectively in a targeted and temporally distinct manner. This work provides a robust platform for targeted co-delivery of chemotherapeutic agents with the hope of both leveraging the synergistic effects of multiple drugs and also potentially suppressing the likelihood of drug resistance by the treated tissues. <img src='wiley_img/18607179-2007-2-9-CMDC200700121-content.gif' alt='wiley_img/18607179-2007-2-9-CMDC200700121-content'> </P>
( Chao Hsuan Chen ),( Yan Han Wang ),( Teruaki Nakatsuji ),( Yu Tsueng Liu ),( Christos C. Zouboulis ),( Richard L. Gallo ),( Liangfang Zhang ),( Ming Fa Hsieh ),( Chun Ming Huang ) 한국미생물 · 생명공학회 2011 Journal of microbiology and biotechnology Vol.21 No.4
Free fatty acids (FFAs) are known to have bacteriocidal activity and are important components of the innateimmune system. Many FFAs are naturally present in human and animal skin, breast milk, and in the bloodstream. Here, the therapeutic potential of FFAs against methicillin-resistant Staphylococcus aureus (MRSA) is demonstrated in cultures and in mice. Among a series of FFAs, only oleic acid (OA) (C18:1, cis-9) can effectively eliminate Staphylococcus aureus (S. aureus) through cell wall disruption. Lauric acid (LA, C12:0) and palmitic acid (PA, C16:0) do not have this ability. OA can inhibit growth of a number of Gram-positive bacteria, including hospital and community-associated MRSA at a dose that did not show any toxicity to human sebocytes. The bacteriocidal activities of FFAs were also demonstrated in vivo through injection of OA into mouse skin lesions previously infected with a strain of MRSA. In conclusion, our results suggest a promising therapeutic approach against MRSA through boosting the bacteriocidal activities of native FFAs, which may have been co-evolved during the interactions between microbes and their hosts.
Zhao, Jiagang,Sun, Woong,Cho, Hyo Min,Ouyang, Hong,Li, Wenlin,Lin, Ying,Do, Jiun,Zhang, Liangfang,Ding, Sheng,Liu, Yizhi,Lu, Paul,Zhang, Kang American Society for Biochemistry and Molecular Bi 2013 The Journal of biological chemistry Vol.288 No.1
<P>Spinal cord injury (SCI) results in devastating motor and sensory deficits secondary to disrupted neuronal circuits and poor regenerative potential. Efforts to promote regeneration through cell extrinsic and intrinsic manipulations have met with limited success. Stem cells represent an as yet unrealized therapy in SCI. Recently, we identified novel culture methods to induce and maintain primitive neural stem cells (pNSCs) from human embryonic stem cells. We tested whether transplanted human pNSCs can integrate into the CNS of the developing chick neural tube and injured adult rat spinal cord. Following injection of pNSCs into the developing chick CNS, pNSCs integrated into the dorsal aspects of the neural tube, forming cell clusters that spontaneously differentiated into neurons. Furthermore, following transplantation of pNSCs into the lesioned rat spinal cord, grafted pNSCs survived, differentiated into neurons, and extended long distance axons through the scar tissue at the graft-host interface and into the host spinal cord to form terminal-like structures near host spinal neurons. Together, these findings suggest that pNSCs derived from human embryonic stem cells differentiate into neuronal cell types with the potential to extend axons that associate with circuits of the CNS and, more importantly, provide new insights into CNS integration and axonal regeneration, offering hope for repair in SCI.</P>