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Recent advances of nanocellulose in drug delivery systems
핫산 눌하스니,Rahman Latifah,Kim So-Hyeon,caojiafu,Arjuna Andi,Lallo Subehan,전병학,유진욱 한국약제학회 2020 Journal of Pharmaceutical Investigation Vol.50 No.6
Background Nanocellulose, which possesses great physical, chemical, and biological properties, is a natural polymer derived from widely available native cellulose. It has outstanding properties such as high mechanical strength, stiffness, low weight, biocompatibility, and renewability, which are beneficial for the design of advanced drug delivery systems, as either an excipient or a carrier. Area covered This review introduces three types of nanocellulose: cellulose nanocrystals, cellulose nanofibers, and bacterial cellulose. Their physical and chemical properties along with their methods of preparation are also compared. Recent studies of nanocellulose for various drug delivery applications are summarized and discussed. Selected nanocellulose studies with significant findings for oral, ocular, intratumoral, topical, and transdermal delivery are also emphasized. Expert opinion Nanocellulose has potential for drug delivery applications due to its high surface area-to-volume ratio and high polymerization, which provide nanocellulose with a high loading and binding capacity for active pharmaceutical ingredients, enabling the control of the drug release.
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핫산 눌하스니,Cao Jiafu,이주호,김현우,유진욱 한국약제학회 2021 Journal of Pharmaceutical Investigation Vol.51 No.5
Purpose Methicillin-resistant Staphylococcus aureus (MRSA) infection on wounds possesses a high risk in increased cases of morbidity and mortality worldwide. Antibiotic-loaded composite biopolymer film wound dressings are one approach to cover the chronic wound area, promote the healing process, and create suitable healing environments. In this study, we developed clindamycin (Cly)-loaded composite biopolymer films using hydrogel-forming biopolymers, such as sodium alginate (SA), pectin (P), and hyaluronic acid (HA) for the treatment of MRSA-infected wounds. Methods Composite films were prepared using a solvent casting method. Cly-loaded composites hydrogel films were evaluated for their physical properties (e.g., film thickness, surface morphology, pH, water vapor transmission, expansion profile, and fluid uptake), in vitro drug release, in vitro bactericidal effects, and in vivo wound healing activity in an ICR mouse model of MRSA-infected wounds. Results Thin, transparent, and highly absorbent Cly-loaded SA-P (Cly/SA-P) and Cly-loaded SA-P-HA (Cly/SA-P-HA) film dressings were successfully prepared with good physical properties. The Cly/SA-P and Cly/SA-P-HA films exhibited drug release over 12 h under immersed conditions and potent antibacterial activity against MRSA (> 5 log reduction in bacterial viability). Furthermore, compared with the other groups, the Cly/SA-P-HA-treated group significantly accelerated the healing and re-epithelialization of wounds in a mouse model of MRSA-infected wounds. All prepared film dressings were not toxic to healthy fibroblast cells. Conclusion Thus, the Cly-loaded composite hydrogel film prepared in this study could be a promising wound dressing for the treatment of infected cutaneous wounds.
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산화질소가 미생물에 미치는 영향 및 이를 이용한 항균전략
최은영,노진기,핫산눌하스니,유진욱,Choi, Eun Young,Noh, Jin-Ki,Hasan, Nurhasni,Yoo, Jin-Wook 한국미생물학회 2014 미생물학회지 Vol.50 No.2
인체의 항상성 유지에 필수적인 물질로 알려진 산화질소는 인체를 침입한 미생물로부터 보호하는 면역반응에서 매우 중요한 역할을 담당하고 있다. 산화질소는 미생물에 직간접적으로 작용하여 다양한 기전으로 항균작용을 나타낸다. 항생제의 심각한 내성이 심각한 사회적 문제로 대두되면서 새로운 계열의 항생제 개발이 절실한 시점에서 항균물질로서의 산화질소에 대한 연구가 활발히 진행되고 있다. 하지만 매우 짧은 반감기와 기체분자인 산화질소를 항생제로 이용하기 위해서는 산화질소의 저장과 방출을 제어할 전략 필요하다. 본 총설에서는 산화질소의 체내에서의 생화학적 특성과 항균작용을 나타내는 다양한 기전에 대해 설명하였다. 또한 산화질소 방출을 조절하여 항균작용을 향상시키는 최근의 연구에 대해 알아보았다. Nitric oxide (NO), which has been recognized as an integral molecule in maintaining homeostasis, plays an important role in host defense against microbes. NO has diverse antimicrobial mechanisms by directly and/or indirectly interacting with microbes. Under the circumstance that there is an urgent need for a new class of antimicrobial agents due to antibiotic resistance, much effort has been made to develop a NO-based antimicrobial agent. In order to make it possible, strategies to store and release NO in a controlled manner are required because NO has a gaseous property and a very short half-life. In this review, we described NO biochemistry and its mechanisms of antimicrobial activity. In additions, we introduced various NO-releasing systems that improve NO's antimicrobial activity.
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