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218) Therefore, the 1, 3-diaminopropane can facilitate the conjugation of FA to PLGA to form a novel polymer and 5-FU loaded PLGA-1, 3-diaminopropane-folic acid nanoparticles can be a highly efficient system for specific delivery of drugs to cancer cells.
* Targeted delivery of 5-fluorouracil to HT-29 cells using high efficient folic acid-conjugated nanoparticles.
- The incorporation of a high percentage of targeting molecules into drug delivery system is one of the important methods for improving efficacy of targeting therapeutic drugs to cancer cells. PLGA-based drug delivery carriers with folic acid (FA) as targeting molecule have a low targeting efficiency due to a low FA conjugation ratio. In this work, we fabricated a FA-conjugated PLGA system using a crosslinker 1, 3-diaminopropane and have achieved a high conjugation ratio of 46.7% (mol/mol). The as-prepared PLGA-based biomaterial was used to encapsulate therapeutic drug 5-fluorouracil (5-FU) into nanoparticles. In the in vitro experiments, an IC₅₀ of 5.69 µg/mL has been achieved for 5-FU loaded PLGA-1, 3-diaminopropane-folic acid nanoparticles on HT-29 cancer cells and is significantly lower than that of 5-FU and 5-FU loaded PLGA nanoparticles which only have an IC₅₀ of 22.9 and 14.17 µg/mL, respectively. The fluorescent microscopy images showed that nanoparticles with FA are largely taken up by HT-29 cancer cells and the targeting nanoparticles have more affinity to cancer cells than the pure drugs and untreated nanoparticles. Therefore, the 1, 3-diaminopropane can facilitate the conjugation of FA to PLGA to form a novel polymer and 5-FU loaded PLGA-1, 3-diaminopropane-folic acid nanoparticles can be a highly efficient system for specific delivery of drugs to cancer cells.
=>制度組織体系的方式, システム, 組織, 整然とした手順, (思想などの)体系, 体制
Overview of noun system
The noun system has 9 senses (first 8 from tagged texts)
1. (43) system -- (instrumentality that combines interrelated interacting artifacts designed to work
as a coherent entity; "he bought a new stereo system"; "the system consists of a motor and a small
computer")
2. (23) system, scheme -- (a group of independent but interrelated elements comprising a unified
whole; "a vast system of production and distribution and consumption keep the country going")
3. (14) system -- ((physical chemistry) a sample of matter in which substances in different phases
are in equilibrium; "in a static system oil cannot be replaced by water on a surface"; "a system
generating hydrogen peroxide")
4. (10) system, system of rules -- (a complex of methods or rules governing behavior; "they have to
operate under a system they oppose"; "that language has a complex system for indicating gender")
5. (8) arrangement, organization, organisation, system -- (an organized structure for arranging or
classifying; "he changed the arrangement of the topics"; "the facts were familiar but it was in the
organization of them that he was original"; "he tried to understand their system of classification")
6. (7) system -- (a group of physiologically or anatomically related organs or parts; "the body has
a system of organs for digestion")
7. (6) system -- (a procedure or process for obtaining an objective; "they had to devise a system
that did not depend on cooperation")
8. (1) system -- (the living body considered as made up of interdependent components forming a
unified whole; "exercise helped him get the alcohol out of his system")
9. organization, organisation, system -- (an ordered manner; orderliness by virtue of being
methodical and well organized; "his compulsive organization was not an endearing quality"; "we can't
do it unless we establish some system around here")
--- WordNet end ---