1
|
Tan YN, Li YP, Huang JD, Luo M, Li SS, Lee AWM, Hu FQ, Guan XY. Thermal-sensitive lipid nanoparticles potentiate anti-PD therapy through enhancing drug penetration and T lymphocytes infiltration in metastatic tumor. Cancer Lett 2021; 522:238-254. [PMID: 34571084 DOI: 10.1016/j.canlet.2021.09.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 09/06/2021] [Accepted: 09/21/2021] [Indexed: 12/12/2022]
Abstract
The response rate of anti-PD therapy in most cancer patients remains low. Therapeutic drug and tumor-infiltrating lymphocytes (TILs) are usually obstructed by the stromal region within tumor microenvironment (TME) rather than distributed around tumor cells, thus unable to induce the immune response of cytotoxic T cells. Here, we constructed the cationic thermosensitive lipid nanoparticles IR780/DPPC/BMS by introducing cationic NIR photosensitizer IR-780 iodide (IR780) modified lipid components, thermosensitive lipid DPPC and PD-1/PD-L1 inhibitor BMS202 (BMS). Upon laser irradiation, IR780/DPPC/BMS penetrated into deep tumor, and reduced cancer-associated fibroblasts (CAFs) around tumor cells to remodel the spatial distribution of TILs in TME. Interestingly, the cationic IR780/DPPC/BMS could capture released tumor-associated antigens (TAAs), thereby enhancing the antigen-presenting ability of DCs to activate cytotoxic T lymphocytes. Moreover, IR780/DPPC/BMS initiated gel-liquid crystal phase transition under laser irradiation, accelerating the disintegration of lipid bilayer structure and leading to the responsive release of BMS, which would reverse the tumor immunosuppression state by blocking PD-1/PD-L1 pathway for a long term. This combination treatment can synergistically exert the antitumor immune response and inhibit the tumor growth and metastasis.
Collapse
Affiliation(s)
- Ya-Nan Tan
- Department of Clinical Oncology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, 518053, China; CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Yong-Peng Li
- Department of Urology, The Third Affiliated Hospital of Shenzhen University (Luohu Hospital Group), Shenzhen, 518000, China
| | - Jian-Dong Huang
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Min Luo
- Department of Clinical Oncology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, 518053, China
| | - Shan-Shan Li
- Department of Clinical Oncology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, 518053, China
| | - Anne Wing-Mui Lee
- Department of Clinical Oncology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, 518053, China; Department of Clinical Oncology, The University of Hong Kong, Hong Kong, 00852, China
| | - Fu-Qiang Hu
- College of Pharmaceutical Science, Zhejiang University, Hangzhou, 310058, China
| | - Xin-Yuan Guan
- Department of Clinical Oncology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, 518053, China; Department of Clinical Oncology, The University of Hong Kong, Hong Kong, 00852, China.
| |
Collapse
|
2
|
Liu X, Zhou XQ, Shang XW, Wang L, Li Y, Yuan H, Hu FQ. Inhibition of chemotherapy-related breast tumor EMT by application of redox-sensitive siRNA delivery system CSO-ss-SA/siRNA along with doxorubicin treatment. J Zhejiang Univ Sci B 2021; 21:218-233. [PMID: 32133799 DOI: 10.1631/jzus.b1900468] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Metastasis is one of the main reasons causing death in cancer patients. It was reported that chemotherapy might induce metastasis. In order to uncover the mechanism of chemotherapy-induced metastasis and find solutions to inhibit treatment-induced metastasis, the relationship between epithelial-mesenchymal transition (EMT) and doxorubicin (DOX) treatment was investigated and a redox-sensitive small interfering RNA (siRNA) delivery system was designed. DOX-related reactive oxygen species (ROS) were found to be responsible for the invasiveness of tumor cells in vitro, causing enhanced EMT and cytoskeleton reconstruction regulated by Ras-related C3 botulinum toxin substrate 1 (RAC1). In order to decrease RAC1, a redox-sensitive glycolipid drug delivery system (chitosan-ss-stearylamine conjugate (CSO-ss-SA)) was designed to carry siRNA, forming a gene delivery system (CSO-ss-SA/siRNA) downregulating RAC1. CSO-ss-SA/siRNA exhibited an enhanced redox sensitivity compared to nonresponsive complexes in 10 mmol/L glutathione (GSH) and showed a significant safety. CSO-ss-SA/siRNA could effectively transmit siRNA into tumor cells, reducing the expression of RAC1 protein by 38.2% and decreasing the number of tumor-induced invasion cells by 42.5%. When combined with DOX, CSO-ss-SA/siRNA remarkably inhibited the chemotherapy-induced EMT in vivo and enhanced therapeutic efficiency. The present study indicates that RAC1 protein is a key regulator of chemotherapy-induced EMT and CSO-ss-SA/siRNA silencing RAC1 could efficiently decrease the tumor metastasis risk after chemotherapy.
Collapse
Affiliation(s)
- Xuan Liu
- College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, China
| | - Xue-Qing Zhou
- College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, China
| | - Xu-Wei Shang
- College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, China
| | - Li Wang
- College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, China
| | - Yi Li
- College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, China
| | - Hong Yuan
- College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, China
| | - Fu-Qiang Hu
- College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, China
| |
Collapse
|
3
|
Tao S, Chen SQ, Zhou WT, Yu FY, Bao L, Qiu GX, Qiao Q, Hu FQ, Wang JW, Yuan H. Correction: A novel biocompatible, simvastatin-loaded, bone-targeting lipid nanocarrier for treating osteoporosis more effectively. RSC Adv 2020; 10:26699-26700. [PMID: 35685945 PMCID: PMC9128604 DOI: 10.1039/d0ra90074e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 06/26/2020] [Indexed: 11/21/2022] Open
Abstract
[This corrects the article DOI: 10.1039/D0RA00685H.].
Collapse
Affiliation(s)
- Shan Tao
- College of Pharmaceutical Sciences, Zhejiang University 866 Yuhangtang Road Hangzhou 310058 China +86-136-06804049
| | - Shao-Qing Chen
- College of Pharmaceutical Sciences, Zhejiang University 866 Yuhangtang Road Hangzhou 310058 China +86-136-06804049
| | - Wen-Tao Zhou
- College of Pharmaceutical Sciences, Zhejiang University 866 Yuhangtang Road Hangzhou 310058 China +86-136-06804049
| | - Fang-Ying Yu
- College of Pharmaceutical Sciences, Zhejiang University 866 Yuhangtang Road Hangzhou 310058 China +86-136-06804049
| | - Lu Bao
- College of Pharmaceutical Sciences, Zhejiang University 866 Yuhangtang Road Hangzhou 310058 China +86-136-06804049
| | - Guo-Xi Qiu
- College of Pharmaceutical Sciences, Zhejiang University 866 Yuhangtang Road Hangzhou 310058 China +86-136-06804049
| | - Qing Qiao
- Anesthesia Department, Zhejiang University School of Medicine, Sir Run Run Shaw Hospital 3 Qingchun East Road Hangzhou 310016 China
| | - Fu-Qiang Hu
- College of Pharmaceutical Sciences, Zhejiang University 866 Yuhangtang Road Hangzhou 310058 China +86-136-06804049
| | - Jian-Wei Wang
- Department of Orthopaedics, The Second Affiliated Hospital of Zhejiang University School of Medicine 88 Jiefang Road Hangzhou 310009 China +86-571-87022776 +86-159-58185118
| | - Hong Yuan
- College of Pharmaceutical Sciences, Zhejiang University 866 Yuhangtang Road Hangzhou 310058 China +86-136-06804049
| |
Collapse
|
4
|
Song LC, Chen W, Zhu L, Hu FQ, Jiang KY. Synthesis, characterization, and some properties of two types of new [Fe]-H 2ase models containing a 4-phosphatopyridine or a 4-phosphatoguanosinepyridine moiety. NEW J CHEM 2020. [DOI: 10.1039/d0nj04194g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The novel [Fe]-H2ase active site framework-containing model 6 was first prepared and structurally characterized.
Collapse
Affiliation(s)
- Li-Cheng Song
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Wei Chen
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Liang Zhu
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Fu-Qiang Hu
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Kai-Yu Jiang
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| |
Collapse
|
5
|
Chen SQ, Song YQ, Wang C, Tao S, Yu FY, Lou HY, Hu FQ, Yuan H. Chitosan-modified lipid nanodrug delivery system for the targeted and responsive treatment of ulcerative colitis. Carbohydr Polym 2019; 230:115613. [PMID: 31887935 DOI: 10.1016/j.carbpol.2019.115613] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 09/25/2019] [Accepted: 11/12/2019] [Indexed: 12/22/2022]
Abstract
Targeted and sensitive drug release at the colitis site is critical for the effective therapy of ulcerative colitis and reduction of side effects from the drug. Herein, we used 3,3'-dithiodipropionic acid (DTPA) to covalently link quercetin (Qu) and glyceryl caprylate-caprate (Gcc) via ester bonds to prepare Qu-SS-Gcc lipid nanoparticles (Qu-SS-Gcc LNPs). Dexamethasone (Dex) was used as a model drug, and chitosan (CSO) was modified on the surface of Qu-SS-Gcc LNPs to obtain CSO-modified Dex-loaded Qu-SS-Gcc LNPs (CSO/Dex/LNPs). The encapsulation efficiency and drug loading of CSO/Dex/LNPs were 93.1 % and 8.1 %, respectively. The in vitro release results showed that CSO/Dex/LNPs had esterase-responsive characteristics and could release the drug rapidly in esterase-containing artificial intestinal fluid. A human colorectal adenocarcinoma cell (Caco-2) monolayer was used as the intestinal cell barrier model. Transmembrane resistance measurements and permeation experiments showed that CSO/Dex/LNPs had a protective effect on the lipopolysaccharide (LPS)-stimulated Caco-2 cell monolayer and increased the expression of E-cadherin in LPS-stimulated Caco-2 cells. Moreover, CSO/Dex/LNPs could significantly reduce the expression of the inflammatory factors TNF-α, IL-6 and NO in LPS-stimulated RAW 264.7 cells. The ulcerative colitis mouse model was constructed by using C57BL/6 mice. The in vivo distribution results showed that CSO/Dex/LNPs had colon-targeting effects and strong retention ability in the colons of mice with colitis. The results also showed that CSO/Dex/LNPs had better anti-inflammatory effects than free Dex, which could reduce colonic atrophy, reduce histomorphological changes and increase the expression of E-cadherin in the colon. Furthermore, the expression levels of TNF-α, IL-6 and NO in the CSO/Dex/LNP-treated group were 37.4 %, 35.5 % and 33.2 % of those in mice with colitis, respectively.
Collapse
Affiliation(s)
- Shao-Qing Chen
- College of Pharmaceutical Sciences, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, People's Republic of China.
| | - Yan-Qing Song
- College of Pharmaceutical Sciences, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, People's Republic of China.
| | - Cheng Wang
- College of Pharmaceutical Sciences, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, People's Republic of China.
| | - Shan Tao
- College of Pharmaceutical Sciences, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, People's Republic of China.
| | - Fang-Ying Yu
- College of Pharmaceutical Sciences, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, People's Republic of China.
| | - Hai-Ya Lou
- Department of Diagnostic Ultrasound and Echocardiography, Sir Run Run Shaw Hospital, Zhejiang University College of Medicine, Hangzhou 310016, People's Republic of China.
| | - Fu-Qiang Hu
- College of Pharmaceutical Sciences, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, People's Republic of China.
| | - Hong Yuan
- College of Pharmaceutical Sciences, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, People's Republic of China.
| |
Collapse
|
6
|
Miao J, Yang XQ, Gao Z, Li Q, Meng TT, Wu JY, Yuan H, Hu FQ. Redox-responsive chitosan oligosaccharide-SS-Octadecylamine polymeric carrier for efficient anti-Hepatitis B Virus gene therapy. Carbohydr Polym 2019; 212:215-221. [PMID: 30832850 DOI: 10.1016/j.carbpol.2019.02.047] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 02/08/2019] [Accepted: 02/14/2019] [Indexed: 01/27/2023]
Abstract
DrzBC and DrzBS (10-23 DNAzyme) could block the expression of HBV e- and s- gene respectively. But the application of 10-23 DNAzyme was limited owing to the lack of appropriate delivery vehicles. Chitosan oligosaccharide-SS-Octadecylamine (CSSO), a redox-responsive nano-sized polymeric carrier, could self-aggregate and bind with DNA by electrostatic interaction at proper mass ratio. Compared with the traditional commercial carrier Lipo2000, CSSO exhibited lower cytotoxicity, efficient cellular uptake by targeting cells, and rapidly DNA released in cytoplasm after escaping from endosomes. Including the same DNA concentration, Lipo2000/(DrzBC or DrzBS) showed maximum inhibitory rate on HBeAg (47.29 ± 1.86%) and HBsAg (33.58 ± 0.72%) secretion after 48 h incubation, and then both decreased. In contrast, HBeAg secretion inhibition by CSSO/DrzBC and HBsAg secretion inhibition by CSSO/DrzBS were up to 73.86 ± 1.77% and 67.80 ± 2.51% at 48 h, and further increased to 83.83 ± 2.34% and 76.79 ± 2.18% at 72 h, respectively. CSSO is a promising redox-responsive polymeric carrier for efficient anti-Hepatitis B Virus gene therapy.
Collapse
Affiliation(s)
- Jing Miao
- College of Pharmaceutical Science, Zhejiang University, Hangzhou 310003, PR China; The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310058, PR China
| | - Xi-Qin Yang
- College of Pharmaceutical Science, Zhejiang University, Hangzhou 310003, PR China
| | - Zhe Gao
- The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310058, PR China
| | - Qian Li
- The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310058, PR China
| | - Ting-Ting Meng
- College of Pharmaceutical Science, Zhejiang University, Hangzhou 310003, PR China
| | - Jia-Ying Wu
- The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310058, PR China
| | - Hong Yuan
- College of Pharmaceutical Science, Zhejiang University, Hangzhou 310003, PR China
| | - Fu-Qiang Hu
- College of Pharmaceutical Science, Zhejiang University, Hangzhou 310003, PR China.
| |
Collapse
|
7
|
Chen SQ, Wang C, Tao S, Wang YX, Hu FQ, Yuan H. Rational Design of Redox-Responsive and P-gp-Inhibitory Lipid Nanoparticles with High Entrapment of Paclitaxel for Tumor Therapy. Adv Healthc Mater 2018; 7:e1800485. [PMID: 29995353 DOI: 10.1002/adhm.201800485] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 06/11/2018] [Indexed: 12/31/2022]
Abstract
An insufficient drug concentration at the target site and drug efflux resulting in poor efficacy is recognized as important obstacles in tumor treatment. Herein, novel lipid nanoparticles (LNPs) with redox-responsive properties based on disulfide bond-contained, quercetin (Qu)-grafted glyceryl caprylate-caprate (Gcc) are introduced (Qu-SS-Gcc LNPs). Qu-SS-Gcc LNPs show good entrapment of paclitaxel (PTX) due to π-π stacking between the aromatic rings of Qu and PTX. In vitro experiments indicate that Qu-SS-Gcc LNPs can selectively respond to high levels of reducing substances by breakdown of disulfide bonds, thus achieving rapid and efficient drug release, and only dissociate rapidly in tumor cells rather than in normal cells. Meanwhile, the Qu released concomitantly with the breakdown of disulfide bonds combines with P-gp and inhibits the drug efflux triggered by P-gp. Using an orthotopic 4T1 mouse mammary tumor model in BALB/c mice, PTX/Qu-SS-Gcc LNPs exhibit superior antitumor efficacy compared to Taxol, in addition better biosafety and inhibition of chemotherapy-triggered P-gp overexpression are achieved. Taken together, this work designs and implements redox-responsive drug release and drug efflux inhibition in tumor cells via modified LNPs, which not only leads to efficient drug release but also solves the problem of drug efflux that exists in stimulus-responsive systems.
Collapse
Affiliation(s)
- Shao-Qing Chen
- College of Pharmaceutical Sciences; Zhejiang University; Yuhangtang Road 866 Hangzhou 310058 P. R. China
| | - Cheng Wang
- College of Pharmaceutical Sciences; Zhejiang University; Yuhangtang Road 866 Hangzhou 310058 P. R. China
| | - Shan Tao
- College of Pharmaceutical Sciences; Zhejiang University; Yuhangtang Road 866 Hangzhou 310058 P. R. China
| | - Yun-Xin Wang
- College of Pharmaceutical Sciences; Zhejiang University; Yuhangtang Road 866 Hangzhou 310058 P. R. China
| | - Fu-Qiang Hu
- College of Pharmaceutical Sciences; Zhejiang University; Yuhangtang Road 866 Hangzhou 310058 P. R. China
| | - Hong Yuan
- College of Pharmaceutical Sciences; Zhejiang University; Yuhangtang Road 866 Hangzhou 310058 P. R. China
| |
Collapse
|
8
|
Song LC, Zhu L, Hu FQ, Wang YX. Studies on Chemical Reactivity and Electrocatalysis of Two Acylmethyl(hydroxymethyl)pyridine Ligand-Containing [Fe]-Hydrogenase Models (2-COCH2-6-HOCH2C5H3N)Fe(CO)2L (L = η1-SCOMe, η1-2-SC5H4N). Inorg Chem 2017; 56:15216-15230. [DOI: 10.1021/acs.inorgchem.7b02582] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Li-Cheng Song
- Department
of Chemistry, State Key Laboratory of Elemento-Organic Chemistry,
College of Chemistry, and ‡Collaborative Innovation Center of Chemical Science
and Engineering (Tianjin), Nankai University, Tianjin 300071, China
| | - Liang Zhu
- Department
of Chemistry, State Key Laboratory of Elemento-Organic Chemistry,
College of Chemistry, and ‡Collaborative Innovation Center of Chemical Science
and Engineering (Tianjin), Nankai University, Tianjin 300071, China
| | - Fu-Qiang Hu
- Department
of Chemistry, State Key Laboratory of Elemento-Organic Chemistry,
College of Chemistry, and ‡Collaborative Innovation Center of Chemical Science
and Engineering (Tianjin), Nankai University, Tianjin 300071, China
| | - Yong-Xiang Wang
- Department
of Chemistry, State Key Laboratory of Elemento-Organic Chemistry,
College of Chemistry, and ‡Collaborative Innovation Center of Chemical Science
and Engineering (Tianjin), Nankai University, Tianjin 300071, China
| |
Collapse
|
9
|
Yang ZC, Deng LY, Gong YL, Yin SP, Jiang B, Huang GT, Peng YZ, Hu FQ. [Inventory building of phages against extensively drug-resistant Acinetobacter baumannii isolated from wounds of patients with severe burn and related characteristic analysis]. Zhonghua Shao Shang Za Zhi 2016; 32:517-22. [PMID: 27647066 DOI: 10.3760/cma.j.issn.1009-2587.2016.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To build inventory of phages against extensively drug-resistant Acinetobacter Baumannii isolated from wounds of inpatients of burn ICU and analyze related characteristics. METHODS In 2014 and 2015, 131 strains of extensively drug-resistant Acinetobacter Baumannii were isolated from wounds of inpatients of burn ICU from one hospital in Chongqing. In 2015, 98 strains of extensively drug-resistant Acinetobacter Baumannii were isolated from wounds of inpatients of burn ICU from 6 hospitals in Guangdong province. Above-mentioned 229 strains were collected for conducting experiments as follows: (1) Multilocus sequence typing (MLST) of strains isolated from Chongqing and Guangdong province was analyzed. (2) Sewage co-culture method was applied for isolation of phages with above-mentioned strains and sewage from Chongqing and Guangdong province. Numbers of isolated phages and times of successful isolation and unsuccessful isolation were recorded. (3) The most prevalent subtypes of strains from Chongqing and Guangdong province in 2015 were collected, and their phages respectively underwent cross infection with all strains from Chongqing and those from Guangdong province. The lysis ability of phage was observed when phage underwent cross infection with the same subtype of strain or not the same, and the lytic ratio was calculated. (4) Fluid of phage in one type was randomly selected and equally divided into 3 parts, and its titer was determined by double dilution method. Then each part of phage fluid was subdivided into 3 small parts, which were cultured with LB fluid medium and respectively stored under the condition of -20 ℃, 4 ℃, and room temperature. After being stored for 1 month and 2 months, the titer of phage was determined for evaluating stability of phage. Data were processed with Fisher's exact test, chi-square test, and one-way analysis of variance. RESULTS (1) The major type of strains from Chongqing in 2014 was ST368 (45%, 31/69), and major types of strains from Chongqing in 2015 were ST75 (26%, 16/62) and ST195 (24%, 15/62), while that from Guangdong province in 2015 was ST977 (46%, 45/98). (2) For strains from Chongqing, isolation effect of phage with sewage of Chongqing (8 times of successful isolation with 9 strains of phages and 1 time of unsuccessful isolation) was better than that with sewage of Guangdong province (1 time of successful isolation with 1 strain of phage and 7 times of unsuccessful isolation). For strains from Guangdong province, isolation effect of phage with sewage of Guangdong province (8 times of successful isolation with 6 strains of phages) was better than that with sewage of Chongqing (7 times of unsuccessful isolation with no phage). These differences were statistically significant (P<0.05 or P<0.01). There was no obvious difference in isolation effect of phage between strains from Chongqing with sewage of Chongqing and strains from Guangdong province with sewage of Guangdong province (P>0.05). (3) The ratios of phages of ST75 and ST977 extensively drug-resistant Acinetobacter Baumannii strains lysing the strains with the same type were respectively 13/16 and 8/9, which were obviously higher than those lysing the strains with different type (respectively 11/115 and 3/53, with χ(2) values respectively 48.23 and 68.46, P values below 0.001). (4) Compared with that before storage, titer of phage under storage condition of -20 ℃, 4 ℃, and room temperature for 1 month decreased by approximately 1 order of magnitude, and that for 2 months decreased by approximately 2 orders of magnitude. After being stored for 1 month and 2 months, there were no statistically significant differences in titer of phage among 3 storage conditions (with F values respectively 1.29 and 1.07, P values above 0.05). CONCLUSIONS This study has successfully built an inventory covering 229 strains of phages of extensively drug-resistant Acinetobacter Baumannii. MLST of extensively drug-resistant Acinetobacter baumannii varies in different area and different time. Phage can be well isolated using sewage with the same source as that of strain. The lysis ability of phage is closely related to the MLST of strains. Inventory of phages should be built according to regional division. Moreover, phage cultured with LB fluid medium shows good stability without special requirements for storage conditions.
Collapse
Affiliation(s)
- Z C Yang
- Institute of Burn Research, Southwest Hospital, State Key Laboratory of Trauma, Burns and Combined Injury, the Third Military Medical University, Chongqing 400038, China
| | | | | | | | | | | | | | | |
Collapse
|
10
|
Chai GH, Xu Y, Chen SQ, Cheng B, Hu FQ, You J, Du YZ, Yuan H. Transport Mechanisms of Solid Lipid Nanoparticles across Caco-2 Cell Monolayers and their Related Cytotoxicology. ACS Appl Mater Interfaces 2016; 8:5929-5940. [PMID: 26860241 DOI: 10.1021/acsami.6b00821] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Solid lipid nanoparticles (SLNs) have been extensively investigated and demonstrated to be a potential nanocarriers for improving oral bioavailability of many drugs. However, the molecular mechanisms related to this discovery are not yet understood. Here, the molecular transport mechanisms of the SLNs crossing simulative intestinal epithelial cell monolayers (Caco-2 cell monolayers) were studied. The cytotoxicology results of the SLNs in Caco-2 cells demonstrated that the nanoparticles had low cytotoxicity, had no effect on the integrity of the cell membrane, did not induce oxidative stress, and could significantly reduce cell membrane fluidity. The endocytosis of the SLNs was time-dependent, and their delivery was energy-dependent. For the first time, the transport of the SLNs was directly verified to be a vesicle-mediated process. The internalization of the SLNs was mediated by macropinocytosis pathway and clathrin- and caveolae (or lipid raft)-related routes. Transferrin-related endosomes, lysosomes, endoplasmic reticulum (ER), and Golgi apparatus were confirmed to be the main destinations of the SLNs in Caco-2 cells. As for the transport of the SLNs in Caco-2 cell monolayers, the results demonstrated that the SLNs transported to the basolateral side were intact, and the transport of the nanoparticles did not destroy the structure of tight junctions. The transcytosis of the SLNs across the Caco-2 cell monolayer was demonstrated to be mediated by the same routes as that in the endocytosis study. The ER, Golgi apparatus, and microtubules were confirmed to be important for the transport of the SLNs to both the basolateral and apical membrane sides. This study provides a more thoroughly understand of SLNs transportation crossing intestinal epithelial cell monolayers and could be beneficial for the fabrication of SLNs.
Collapse
Affiliation(s)
- Gui-Hong Chai
- Institute of Pharmaceutics, Zhejiang University , 866 Yuhangtang Road, Hangzhou 310058, China
| | - Yingke Xu
- Key Laboratory of Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Zhejiang University , Hangzhou 310027, China
| | - Shao-Qing Chen
- Institute of Pharmaceutics, Zhejiang University , 866 Yuhangtang Road, Hangzhou 310058, China
| | - Bolin Cheng
- Institute of Pharmaceutics, Zhejiang University , 866 Yuhangtang Road, Hangzhou 310058, China
| | - Fu-Qiang Hu
- Institute of Pharmaceutics, Zhejiang University , 866 Yuhangtang Road, Hangzhou 310058, China
| | - Jian You
- Institute of Pharmaceutics, Zhejiang University , 866 Yuhangtang Road, Hangzhou 310058, China
| | - Yong-Zhong Du
- Institute of Pharmaceutics, Zhejiang University , 866 Yuhangtang Road, Hangzhou 310058, China
| | - Hong Yuan
- Institute of Pharmaceutics, Zhejiang University , 866 Yuhangtang Road, Hangzhou 310058, China
| |
Collapse
|
11
|
Abstract
Purpose Nanoparticles (NPs) that target bone tissue were developed using poly(lactic-co-glycolic acid) (PLGA) copolymers and tetracycline (TC)-based bone-targeting moieties. These NPs are expected to enable the transport of drugs, such as simvastatin (SIM), for the treatment of osteoporosis. Methods The molecular structures of TC–PLGA were validated by 1H-NMR, and the SIM-loaded NPs were prepared using the solvent emulsification method. The surface properties, cytotoxicity, cellular uptake, cell mineralization, bone targeting potential, and animal pharmacodynamics of the TC–PLGA NPs were evaluated and compared to those of PLGA NPs. Results It was confirmed that the average particle size of the NPs was approximately 220 nm. In phosphate-buffered saline (PBS, pH 7.4), the SIM-loaded NPs exhibited a cumulative release of up to 80% within 72 hours. An in vitro cell evaluation indicated that the NPs had an excellent cellular uptake capacity and showed great biocompatibility with MC3T3-E1 cells, thereby reducing the cytotoxic effects of SIM. The cell mineralization assay showed that the SIM-loaded NPs induced osteogenic differentiation and mineralized nodule formation in MC3T3-E1 cells, thereby achieving the same effect as SIM. Preliminary findings from in vitro and in vivo bone affinity assays indicated that the TC–PLGA NPs may display increased bone-targeting efficiency compared to PLGA NPs lacking a TC moiety. The use of SIM-loaded TC–PLGA NPs in treating osteoporosis was tested through animal pharmacodynamics analyses performed in ovariectomized rats, and the results suggested that the SIM-loaded TC–PLGA NPs can improve the curative effects of SIM on the recovery of bone mineral density compared to either SIM-loaded PLGA NPs or SIM alone. Conclusion Bone-targeting NPs, which were based on the conjugation of TC to PLGA copolymers, have the ability to target bone. These NPs may be developed as a delivery system for hydrophobic drugs, and they are expected to improve the curative effects of drugs, reduce the administered drug doses, and reduce side effects in other organs.
Collapse
Affiliation(s)
- Hua Wang
- Center of Analysis and Measurement, Zhejiang University, Hangzhou, People's Republic of China
| | - Jun Liu
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| | - Shan Tao
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| | - Guihong Chai
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| | - Jianwei Wang
- The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, People's Republic of China
| | - Fu-Qiang Hu
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| | - Hong Yuan
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| |
Collapse
|
12
|
Shan CL, Huang B, You J, Yuan H, Gao JQ, Hu FQ, Du YZ. High efficiency intracellular transport of cationic peptide stearate for gene delivery in tumor cells and multipotent stem cells. J Biomed Nanotechnol 2015; 10:3231-43. [PMID: 26000383 DOI: 10.1166/jbn.2014.1860] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Identifying an optimal gene vector is critical for improving transfection efficiency in gene therapy. In this study, a novel, non-viral gene vector composed of a stearate cationic peptide, Cys-Arg-His-Lys-Arg-His-Lys-Arg-His-Lys-Arg-His (CRHKRHKRHKRH), was engineered. The stearate cationic peptide (STR-Pep) could form micelles via its amphipathic properties at a concentration of 182 μg/mL, and condense plasmid DNA effectively above weight ratio of 1:1 to form nanosize complex nanoparticles. Cellular uptake experiments confirmed that STR-Pep micelles and STR-Pep/plasmid DNA complex nanoparticles could pass through cell membranes rapidly, promote endosomal escape and release plasmid DNA from the complex nanoparticles successfully. Compared to Lipofectamine 2000, a commercial gene transfection vector, the engineered vector displayed higher transfection efficiency in certain cell types. Moreover, the STR-Pep gene delivery system was less cytotoxic than Lipofectamine 2000. In vivo anti-tumor activity was achieved by STR-Pep-mediated gene therapy using the plasmid DNA of pigment epithelium derived factor (pPEDF). STR-Pep also regulated gene expression in bone-marrow-derived mesenchymal stem cells (MSCs), effectively inducing osteogenesis and neurogenesis. These results demonstrate that STR-Pep is a potential non-viral vector for in vitro and in vivo gene delivery.
Collapse
|
13
|
Liu P, Situ JQ, Li WS, Shan CL, You J, Yuan H, Hu FQ, Du YZ. High tolerated paclitaxel nano-formulation delivered by poly (lactic-co-glycolic acid)-g-dextran micelles to efficient cancer therapy. Nanomedicine: Nanotechnology, Biology and Medicine 2015; 11:855-66. [DOI: 10.1016/j.nano.2015.02.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 02/04/2015] [Accepted: 02/09/2015] [Indexed: 12/31/2022]
|
14
|
Yi HX, Wu J, Du YZ, Hu YW, Yuan H, You J, Hu FQ. Effect of anionic PEGylated polypeptide on gene transfection mediated by glycolipid conjugate micelles. Mol Pharm 2015; 12:1072-83. [PMID: 25490413 DOI: 10.1021/mp500560h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
To improve the gene transfection efficiency mediated by chitosan-g-stearic acid (CS) micelles, poly(ethylene glycol)-b-poly(γ-glutamic acid) (PG) was incorporated into a CS-based gene delivery system. CS/PG/pDNA complexes were prepared by ionic interaction. CS and PEGylated CS (PCS) micelles were introduced to prepare binary complexes for use as controls. CS/PG/pDNA complexes possessed similar sizes and presented as irregular spheroids in shape. The incorporation of PG into CS/pDNA complexes did not affect the ability of CS to compact pDNA and also showed a protective effect against DNase I based degradation of pDNA. Importantly, PG could increase gene transfection efficiency, which was also affected by the mixing methods used for the preparation of CS/PG/pDNA ternary complexes. The transfection efficiencies mediated by CS/PG/pDNA complexes against HEK293 and EC-1 cells reached up to 40.8% and 11.6%, respectively, which were much higher than those of CS/pDNA complexes (1.3% and 4.0%) and PCS/pDNA complexes (0.8% and 2.4%). In addition, the incorporation of PG into CS/pDNA complexes significantly enhanced cellular uptake in HEK293 and EC-1 cells and, additionally, improved endosomal escape and intracellular vector unpacking. However, the incorporation of PG reduced the cellular uptake of CS/PG/pDNA complexes in macrophages (RAW264.7 cells). It was further demonstrated that, in addition to a nonspecific charge-mediated binding to cell membranes, a γ-PGA-specific receptor-mediated pathway was involved in the internalization of CS/PG/pDNA complexes. These results indicated that PG played multiple important roles in enhancing the transfection efficiency of CS/PG/pDNA complexes.
Collapse
Affiliation(s)
- Han-Xi Yi
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, People's Republic of China
| | - Jie Wu
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, People's Republic of China
| | - Yong-Zhong Du
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, People's Republic of China
| | - Ying-Wen Hu
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, People's Republic of China
| | - Hong Yuan
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, People's Republic of China
| | - Jian You
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, People's Republic of China
| | - Fu-Qiang Hu
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, People's Republic of China
| |
Collapse
|
15
|
Situ JQ, Ye YQ, Zhu XL, Yu RS, You J, Yuan H, Hu FQ, Du YZ. Specific targeting of A54 homing peptide-functionalized dextran-g-poly(lactic-co-glycolic acid) micelles to tumor cells. Int J Nanomedicine 2015; 10:665-75. [PMID: 25653517 PMCID: PMC4303462 DOI: 10.2147/ijn.s76307] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The delivery of chemotherapeutics into tumor cells is a fundamental knot for tumor-target therapy to improve the curative effect and avoid side effects. Here, A54 peptide-functionalized poly(lactic-co-glycolic acid)-grafted dextran (A54-Dex-PLGA) was synthesized. The synthesized A54-Dex-PLGA self-assembled to form micelles with a low critical micelle concentration of 16.79 μg·mL−1 and diameter of about 50 nm. With doxorubicin (DOX) base as a model antitumor drug, the drug-encapsulation efficiency of DOX-loaded A54-Dex-PLGA micelles (A54-Dex-PLGA/DOX) reached up to 75%. In vitro DOX release from the A54-Dex-PLGA/DOX was prolonged to 72 hours. The A54-Dex-PLGA micelles presented excellent internalization ability into hepatoma cells (BEL-7402 cell line and HepG2 cell line) in vitro, and the cellular uptake of the micelles by the BEL-7402 cell line was specific, which was demonstrated by the blocking experiment. In vitro antitumor activity studies confirmed that A54-Dex-PLGA/DOX micelles suppressed tumor-cell (BEL-7402 cell) growth more effectively than Dex-PLGA micelles. Furthermore, in vivo biodistribution testing demonstrated that the A54-Dex-PLGA micelles had a higher distribution ability to BEL-7402 tumors than that to HepG2 tumors.
Collapse
Affiliation(s)
- Jun-Qing Situ
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| | - Yi-Qing Ye
- Women's Hospital, Zhejiang University, Hangzhou, People's Republic of China
| | - Xiu-Liang Zhu
- Department of Radiology, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
| | - Ri-Sheng Yu
- Department of Radiology, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
| | - Jian You
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| | - Hong Yuan
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| | - Fu-Qiang Hu
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| | - Yong-Zhong Du
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| |
Collapse
|
16
|
Song LC, Hu FQ, Zhao GY, Zhang JW, Zhang WW. Several New [Fe]Hydrogenase Model Complexes with a Single Fe Center Ligated to an Acylmethyl(hydroxymethyl)pyridine or Acylmethyl(hydroxy)pyridine Ligand. Organometallics 2014. [DOI: 10.1021/om5009296] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Li-Cheng Song
- Department
of Chemistry,
State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Fu-Qiang Hu
- Department
of Chemistry,
State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Gao-Yu Zhao
- Department
of Chemistry,
State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Ji-Wei Zhang
- Department
of Chemistry,
State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Wei-Wei Zhang
- Department
of Chemistry,
State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| |
Collapse
|
17
|
Hu FQ, Qiao T, Xie X, Hu R, Xiao HB. Knockdown of the inflammatory factor pentraxin-3 suppresses growth and invasion of lung adenocarcinoma through the AKT and NF-kappa B pathways. J BIOL REG HOMEOS AG 2014; 28:649-657. [PMID: 25620175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Pentraxin-3 (PTX3), a modulator of tumor-associated inflammation, is known to be positively correlated with tumor grade and severity of malignancies, but the function and molecular underlying mechanisms of PTX3 remain unclear. In the present study, the expression of PTX3 in human lung adenocarcinoma (LAC) was examined by immunohistochemical assay using a tissue microarray procedure. A loss-of-function experiment was performed to explore the effects of lentiviral vector-mediated PTX3 shRNA (Lv-shPTX3) on cell growth and invasive potential in LAC cell lines (A549 and LETPα-2), assessed by MTT and Transwell assays, respectively. We found that the expression of PTX3 protein was significantly increased in LAC tissues compared with that in adjacent non-cancerous tissues (ANCT) (60.42% vs. 29.17%, P=0.004), and positively correlated with lymphatic invasion of the tumor (P=0.006). Furthermore, knockdown of PTX3 suppressed tumor proliferation and invasion of LAC cells, followed by decreased expression of p-AKT, p-NF-kappa B, PCNA, and MMP-9. Taken together, our findings demonstrate that upregulation of PTX3 expression is correlated with tumor metastasis of LAC patients, and knockdown of PTX3 blocks the development of LAC through inhibition of the AKT and NF-kappa B pathways, suggesting that PTX3 may serve as a potential therapeutic target for the treatment of cancer.
Collapse
Affiliation(s)
- F Q Hu
- Department of Cardiothoracic Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - T Qiao
- Department of Cardiothoracic Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - X Xie
- Department of Cardiothoracic Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - R Hu
- Department of Cardiothoracic Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - H B Xiao
- Department of Cardiothoracic Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| |
Collapse
|
18
|
Chen FY, Yan JJ, Yi HX, Hu FQ, Du YZ, Yuan H, You J, Zhao MD. TNYL peptide functional chitosan-g-stearate conjugate micelles for tumor specific targeting. Int J Nanomedicine 2014; 9:4597-608. [PMID: 25298734 PMCID: PMC4186491 DOI: 10.2147/ijn.s69572] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Nowadays, a real challenge in cancer therapy is to design drug delivery systems that can achieve high concentrations of drugs at the target site for improved therapeutic effect with reduced side effects. In this research, we designed and synthesized a homing peptide-(TNYLFSPNGPIA, TNYL) modified chitosan-g-stearate (CS) polymer micelle (named T-CS) for targeting delivery. The peptide displayed specific binding affinity to EphB4 which is a member of the Eph family of receptor tyrosine protein kinases. The amphiphilic polymer T-CS can gather into micelles by themselves in an aqueous environment with a low critical micelle concentration value (91.2 μg/L) and nano-scaled size (82.1±2.8 nm). The drug encapsulation efficiency reached 86.43% after loading the hydrophobic drug doxorubicin (DOX). The cytotoxicity of T-CS/DOX against SKOV3 cells was enhanced by approximately 2.3-fold when compared with CS/DOX. The quantitative and qualitative analysis for cellular uptake indicated that TNYL modification can markedly increase cellular internalization in the EphB4-overexpressing SKOV3 cell line, especially with a short incubation time. It is interesting that relatively higher uptake of the T-CS/DOX micelles by SKOV3 cells (positive-EphB4) than A549 cells (negative-EphB4) was observed when the two cells were co-incubated. Furthermore, in vivo distribution experiment using a bilateral-tumor model showed that there was more fluorescence accumulation in the SKOV3 tumor than in the A549 tumor over the whole experiment. These results suggest that TNYL-modified CS micelles may be promising drug carriers as targeting therapy for the EphB4-overexpressing tumor.
Collapse
Affiliation(s)
- Feng-Ying Chen
- Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
| | - Jing-Jing Yan
- Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
| | - Han-Xi Yi
- College of Pharmaceutical Science, Zhejiang University, Hangzhou, People's Republic of China
| | - Fu-Qiang Hu
- College of Pharmaceutical Science, Zhejiang University, Hangzhou, People's Republic of China
| | - Yong-Zhong Du
- College of Pharmaceutical Science, Zhejiang University, Hangzhou, People's Republic of China
| | - Hong Yuan
- College of Pharmaceutical Science, Zhejiang University, Hangzhou, People's Republic of China
| | - Jian You
- College of Pharmaceutical Science, Zhejiang University, Hangzhou, People's Republic of China
| | - Meng-Dan Zhao
- Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
| |
Collapse
|
19
|
Chai GH, Hu FQ, Sun J, Du YZ, You J, Yuan H. Transport Pathways of Solid Lipid Nanoparticles Across Madin–Darby Canine Kidney Epithelial Cell Monolayer. Mol Pharm 2014; 11:3716-26. [DOI: 10.1021/mp5004674] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gui-Hong Chai
- College
of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, People’s Republic of China
| | - Fu-Qiang Hu
- College
of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, People’s Republic of China
| | - Jihong Sun
- Department
of Radiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310016, People’s Republic of China
| | - Yong-Zhong Du
- College
of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, People’s Republic of China
| | - Jian You
- College
of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, People’s Republic of China
| | - Hong Yuan
- College
of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, People’s Republic of China
| |
Collapse
|
20
|
Abstract
Cis-aconitate-modified chitosan-g-stearic acid (CA-CSO-SA) micelles were synthesized in this study to improve the gene transfection efficiency of chitosan-g-stearic acid (CSO-SA). The CA-CSO-SA micelles had a similar size, critical micelle concentration, and morphology, but their zeta potential and cytotoxicity were reduced compared with CSO-SA micelles. After modification with cis-aconitate, the CA-CSO-SA micelles could also compact plasmid DNA (pDNA) to form nanocomplexes. However, the DNA binding ability of CA-CSO-SA was slightly reduced compared with that of CSO-SA. The transfection efficiency mediated by CA-CSO-SA/pDNA against HEK-293 cells reached up to 37%, and was much higher than that of CSO-SA/pDNA (16%). Although the cis-aconitate modification reduced cellular uptake kinetics in the initial stages, the total amount of cellular uptake tended to be the same after 24 hours of incubation. An endocytosis inhibition experiment showed that the internalization mechanism of CA-CSO-SA/pDNA in HEK-293 cells was mainly via clathrin-mediated endocytosis, as well as caveolae-mediated endocytosis and macropinocytosis. Observation of intracellular trafficking indicated that the CSO-SA/pDNA complexes were trapped in endolysosomes, but CA-CSO-SA/pDNA was more widely distributed in the cytosol. This study suggests that modification with cis-aconitate improves the transfection efficiency of CSO-SA/pDNA.
Collapse
Affiliation(s)
- Jing-Jing Yao
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| | - Yong-Zhong Du
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| | - Hong Yuan
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| | - Jian You
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| | - Fu-Qiang Hu
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| |
Collapse
|
21
|
Song LC, Hu FQ, Wang MM, Xie ZJ, Xu KK, Song HB. Synthesis, structural characterization, and some properties of 2-acylmethyl-6-ester group-difunctionalized pyridine-containing iron complexes related to the active site of [Fe]-hydrogenase. Dalton Trans 2014; 43:8062-71. [DOI: 10.1039/c4dt00335g] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first four acylmethyl/ester group-disubstituted pyridine-containing models for [Fe]-hydrogenase have been synthesized and crystallographically characterized.
Collapse
Affiliation(s)
- Li-Cheng Song
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071, China
| | - Fu-Qiang Hu
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071, China
| | - Miao-Miao Wang
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071, China
| | - Zhao-Jun Xie
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071, China
| | - Kai-Kai Xu
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071, China
| | - Hai-Bin Song
- Department of Chemistry
- State Key Laboratory of Elemento-Organic Chemistry
- and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071, China
| |
Collapse
|
22
|
Gong W, Ma R, Mei D, Jing P, Dong X, Li B, Yang Y, Du L, Mei XG, Hu FQ. A novel subcutaneous infusion delivery system based on osmotic pump:in vitroandin vivoevaluation. Drug Deliv 2013; 21:1-7. [DOI: 10.3109/10717544.2013.838718] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
23
|
Miao J, Du YZ, Yuan H, Zhang XG, Hu FQ. Drug resistance reversal activity of anticancer drug loaded solid lipid nanoparticles in multi-drug resistant cancer cells. Colloids Surf B Biointerfaces 2013; 110:74-80. [DOI: 10.1016/j.colsurfb.2013.03.037] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 03/11/2013] [Accepted: 03/19/2013] [Indexed: 11/30/2022]
|
24
|
Jiang SP, He SN, Li YL, Feng DL, Lu XY, Du YZ, Yu HY, Hu FQ, Yuan H. Preparation and characteristics of lipid nanoemulsion formulations loaded with doxorubicin. Int J Nanomedicine 2013; 8:3141-50. [PMID: 23990722 PMCID: PMC3753155 DOI: 10.2147/ijn.s47708] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Purpose Safe and effective lipid nanoemulsion (LNE) formulations for the antitumor delivery of doxorubicin is designed. Methods LNEs composed of medium-chain triglyceride, soybean oil, lecithin, and doxorubicin are prepared by a solvent-diffusion method in an aqueous system. The effects of lipid material composition and polyethylene glycol (PEG)ylation on the size, drug encapsulation efficiency, and stability of LNEs are investigated. Based on in-vitro cytotoxicity and cellular uptake tests of A549 (human lung carcinoma) cells, in-vivo biodistribution, antitumor activity, and cardiac toxicity are further examined using nude mouse bearing A549 tumor. Results The LNE size decreases from 126.4 ± 8.7 nm to 44.5 ± 9.3 nm with increased weight ratio of medium-chain triglyceride to soybean oil from 1:4 to 3:2, whereas the encapsulation efficiency of doxorubicin is slightly reduced from 79.2% ± 2.1% to 71.2% ± 2.9%. The PEGylation of LNE by 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[carboxy(PEG)2000] (DSPE-PEG 2000) does not significantly change the size and drug encapsulation efficiency. Three-month storage at room temperature and lyophilization process does not affect the drug encapsulation efficiency, whereas the size slightly increases to almost 100 nm. The in-vitro drug-release profiles of LNEs suggest that the present formulation can prolong drug release for 48 hours. LNEs can be internalized into tumor cells in vitro and efficiently accumulate in tumor tissues in vivo by passive targeting. Analysis results of in-vitro and in-vivo antitumor activities reveal that doxorubicin-loaded LNE exerts a therapeutic effect similar to that of the commercial Adriamycin. Moreover, the toxicity of doxorubicin, particularly its cardiac toxicity, is reduced. Conclusion The present LNE formulation of doxorubicin can effectively suppress tumor growth and improve the safety of Adriamycin.
Collapse
Affiliation(s)
- Sai-Ping Jiang
- Department of Pharmacy, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, People's Republic of China
| | | | | | | | | | | | | | | | | |
Collapse
|
25
|
He SN, Li YL, Yan JJ, Zhang W, Du YZ, Yu HY, Hu FQ, Yuan H. Ternary nanoparticles composed of cationic solid lipid nanoparticles, protamine, and DNA for gene delivery. Int J Nanomedicine 2013; 8:2859-69. [PMID: 23990715 PMCID: PMC3753151 DOI: 10.2147/ijn.s47967] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Background The objective of this research was to design an effective gene delivery system composed of cationic solid lipid nanoparticles (SLNs), protamine, and Deoxyribonucleic acid DNA. Methods Cationic SLNs were prepared using an aqueous solvent diffusion method with octadecylamine as the cationic lipid material. First, protamine was combined with DNA to form binary protamine/DNA nanoparticles, and the ternary nanoparticle gene delivery system was then obtained by combining binary protamine/DNA nanoparticles with cationic SLNs. The size, zeta potential, and ability of the binary and ternary nanoparticles to compact and protect DNA were characterized. The effect of octadecylamine content in SLNs and the SLNS/DNA ratios on transfection efficiency, cellular uptake and cytotoxicity of the ternary nanoparticles were also assessed using HEK293 cells. Results When the weight ratio of protamine to DNA reached 1.5:1, the plasmid DNA could be effectively compacted and protected. The average hydrodynamic diameter of the ternary nanoparticles when combined with protamine increased from 188.50 ± 0.26 nm to 259.33 ± 3.44 nm, and the zeta potential increased from 25.50 ± 3.30 mV to 33.40 ± 2.80 mV when the weight ratio of SLNs to DNA increased from 16/3 to 80/3. The ternary nanoparticles showed high gene transfection efficiency compared with Lipofectamine™ 2000/DNA nanoparticles. Several factors that might affect gene transfection efficiency, such as content and composition of SLNs, post-transfection time, and serum were examined. The ternary nanoparticles composed of SLNs with 15 wt% octadecylamine (50/3 weight ratio of SLNs to DNA) showed the best transfection efficiency (26.13% ± 5.22%) in the presence of serum. It was also found that cellular uptake of the ternary nanoparticles was better than that of the SLN/DNA and binary protamine/DNA nanoparticle systems, and DNA could be transported to the nucleus. Conclusion SLNs enhanced entry of binary protamine/DNA nanoparticles into the cell, and protamine protected DNA from enzyme degradation and transported DNA into the nucleus. Compared with Lipofectamine 2000/DNA nanoparticles, these cationic ternary nanoparticles showed relatively durable and stable gene transfection in the presence of serum.
Collapse
Affiliation(s)
- Sai-Nan He
- Women's Hospital, Zhejiang University, Hangzhou, People's Republic of China
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Yan J, Du YZ, Chen FY, You J, Yuan H, Hu FQ. Effect of Proteins with Different Isoelectric Points on the Gene Transfection Efficiency Mediated by Stearic Acid Grafted Chitosan Oligosaccharide Micelles. Mol Pharm 2013; 10:2568-77. [DOI: 10.1021/mp300732d] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Jingjing Yan
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou
310058, People’s Republic of China
| | - Yong-Zhong Du
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou
310058, People’s Republic of China
| | - Feng-Ying Chen
- Women Hospital, School of Medicine, Zhejiang University, 2 Xueshi Road, Hangzhou 310006,
People’s Republic of China
| | - Jian, You
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou
310058, People’s Republic of China
| | - Hong Yuan
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou
310058, People’s Republic of China
| | - Fu-Qiang Hu
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou
310058, People’s Republic of China
| |
Collapse
|
27
|
Yuan H, Chen CY, Chai GH, Du YZ, Hu FQ. Improved Transport and Absorption through Gastrointestinal Tract by PEGylated Solid Lipid Nanoparticles. Mol Pharm 2013; 10:1865-73. [DOI: 10.1021/mp300649z] [Citation(s) in RCA: 170] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Hong Yuan
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.
R. China
| | - Chun-Yan Chen
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.
R. China
| | - Gui-hong Chai
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.
R. China
| | - Yong-Zhong Du
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.
R. China
| | - Fu-Qiang Hu
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.
R. China
| |
Collapse
|
28
|
Yuan H, Bao X, Du YZ, You J, Hu FQ. Preparation and evaluation of SiO2-deposited stearic acid-g-chitosan nanoparticles for doxorubicin delivery. Int J Nanomedicine 2012; 7:5119-28. [PMID: 23055724 PMCID: PMC3463401 DOI: 10.2147/ijn.s35575] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Indexed: 11/23/2022] Open
Abstract
Purpose: Both polymer micelles and mesoporous silica nanoparticles have been widely researched as vectors for small molecular insoluble drugs. To combine the advantages of copolymers and silica, studies on the preparation of copolymer-silica composites and cellular evaluation were carried out. Methods: First, a stearic acid-g-chitosan (CS-SA) copolymer was synthesized through a coupling reaction, and then silicone oxide (SiO2)-deposited doxorubicin (DOX)-loaded stearic acid-g-chitosan (CS-SA/SiO2/DOX) nanoparticles were prepared through the sol-gel reaction. Physical and chemical properties such as particle size, zeta potential, and morphologies were examined, and small-angle X-ray scattering (SAXS) analysis was employed to identify the mesoporous structures of the generated nanoparticles. Cellular uptake and cytotoxicity studies were also conducted. Results: CS-SA/SiO2/DOX nanoparticles with different amounts of SiO2 deposited were obtained, and SAXS studies showed that mesoporous structures existed in the CS-SA/SiO2/DOX nanoparticles. The mesoporous size of middle-ratio and high-ratio deposited CS-SA/SiO2/DOX nanoparticles were 4–5 nm and 8–10 nm, respectively. Based on transmission electron microscopy images of CS-SA/SiO2/DOX nanoparticles, dark rings around the nanoparticles could be observed in contrast with CS-SA/DOX micelles. Furthermore, CS-SA/SiO2/DOX nanoparticles exhibited faster release behavior in vitro than CS-SA/DOX micelles; cellular uptake research in A549 indicated that the CS-SA/SiO2/DOX nanoparticles were taken up by A549 cells more rapidly, and that CS-SA/SiO2/DOX nanoparticles entered the cell more easily when the amount of SiO2 was higher. IC50 values of CS-SA/DOX micelles, CS-SA/SiO2/DOX-4, CS-SA/SiO2/DOX-8, and CS-SA/SiO2/DOX-16 nanoparticles against A549 cells measured using the MTT assay were 1.69, 0.93, 0.32, and 0.12 μg/mL, respectively. Conclusion: SiO2-deposited stearic acid-g-chitosan organic–inorganic composites show promise as nanocarriers for hydrophobic drugs such as DOX.
Collapse
Affiliation(s)
- Hong Yuan
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, PR China.
| | | | | | | | | |
Collapse
|
29
|
Hu FQ, Zhang YY, You J, Yuan H, Du YZ. pH Triggered Doxorubicin Delivery of PEGylated Glycolipid Conjugate Micelles for Tumor Targeting Therapy. Mol Pharm 2012; 9:2469-78. [DOI: 10.1021/mp300002v] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fu-Qiang Hu
- College of Pharmaceutical Sciences, Zhejiang University,
866 Yuhangtang Road, Hangzhou 310058, P. R. China
| | - Yin-Ying Zhang
- College of Pharmaceutical Sciences, Zhejiang University,
866 Yuhangtang Road, Hangzhou 310058, P. R. China
| | - Jian You
- College of Pharmaceutical Sciences, Zhejiang University,
866 Yuhangtang Road, Hangzhou 310058, P. R. China
| | - Hong Yuan
- College of Pharmaceutical Sciences, Zhejiang University,
866 Yuhangtang Road, Hangzhou 310058, P. R. China
| | - Yong-Zhong Du
- College of Pharmaceutical Sciences, Zhejiang University,
866 Yuhangtang Road, Hangzhou 310058, P. R. China
| |
Collapse
|
30
|
Abstract
PURPOSE Therapy for central nervous system disease is mainly restricted by the blood-brain barrier. A drug-delivery system is an effective approach to overcome this barrier. In this research, the potential of polymeric micelles for brain-targeting drug delivery was studied. METHODS Stearic acid-grafted chitosan (CS-SA) was synthesized by hydrophobic modification of chitosan with stearic acid. The physicochemical characteristics of CS-SA micelles were investigated. bEnd.3 cells were chosen as model cells to evaluate the internalization ability and cytotoxicity of CS-SA micelles in vitro. Doxorubicin (DOX), as a model drug, was physically encapsulated in CS-SA micelles. The in vivo brain-targeting ability of CS-SA micelles was qualitatively and quantitatively studied by in vivo imaging and high-performance liquid chromatography analysis, respectively. The therapeutic effect of DOX-loaded micelles in vitro was performed on glioma C6 cells. RESULTS The critical micelle concentration of CS-SA micelles with 26.9% ± 1.08% amino substitute degree was 65 μg/mL. The diameter and surface potential of synthesized CS-SA micelles in aqueous solution was 22 ± 0.98 nm and 36.4 ± 0.71 mV, respectively. CS-SA micelles presented excellent cellular uptake ability on bEnd.3 cells, the IC(50) of which was 237.6 ± 6.61 μg/mL. DOX-loaded micelles exhibited slow drug-release behavior, with a cumulative release up to 72% within 48 hours in vitro. The cytotoxicity of DOX-loaded CS-SA micelles against C6 was 2.664 ± 0.036 μg/mL, compared with 0.181 ± 0.066 μg/mL of DOX · HCl. In vivo imaging results indicated that CS-SA was able to transport rapidly across the blood-brain barrier and into the brain. A maximum DOX distribution in brain of 1.01%/g was observed 15 minutes after administration and maintained above 0.45%/g within 1 hour. Meanwhile, free DOX · HCl was not detected in brain. In other major tissues, DOX-loaded micelles were mainly distributed into lung, liver, and spleen, with a reduction of DOX accumulation in heart. CONCLUSION The CS-SA micelles were able to be used as a promising carrier for a braintargeting drug delivery system.
Collapse
Affiliation(s)
- Yi-Ting Xie
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | | | | | | |
Collapse
|
31
|
Huang X, Huang X, Jiang XH, Hu FQ, Du YZ, Zhu QF, Jin CS. In vitro antitumour activity of stearic acid-g-chitosan oligosaccharide polymeric micelles loading podophyllotoxin. J Microencapsul 2012; 29:1-8. [PMID: 22229874 DOI: 10.3109/02652048.2011.621551] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Development of successful formulations for poorly water-soluble drugs remains a longstanding critical and challenging issue in cancer therapy. The stearic acid-g-chitosan oligosaccharide (CSO-SA) micelles have been presented as potential candidates for intracellular antitumour agent delivery carrier. Herein, podophyllotoxin (PPT) loaded CSO-SA micelles (CSO-SA/PPT) were prepared by a dialysis method. The drug encapsulation efficiency could reach a higher level, the micellar size and the zeta potential increased with increasing charged amounts of drug. The cumulative release percentage of PPT drug from micelles enhanced with decreasing PPT content in the micelles. The cytotoxicities of CSO-SA/PPT micelles against human breast carcinoma (MCF-7) cells, human lung cancer cells (A549) and human hepatoma cell line (Bel-7402) were higher than that of free PPT formulation. The higher cytotoxicities were due to the faster PPT transport into tumour cells mediated by CSO-SA micelles. Overall, CSO-SA micelles might be a promising carrier for PPT delivery in cancer therapy.
Collapse
Affiliation(s)
- Xuan Huang
- Department of Pharmacy, School of Medicine Science, Jiaxing University, Jiaxing, Zhejiang, China
| | | | | | | | | | | | | |
Collapse
|
32
|
Zhao MD, Sun YM, Fu GF, Du YZ, Chen FY, Yuan H, Zheng CH, Zhang XM, Hu FQ. Gene therapy of endometriosis introduced by polymeric micelles with glycolipid-like structure. Biomaterials 2012; 33:634-43. [DOI: 10.1016/j.biomaterials.2011.09.077] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Accepted: 09/27/2011] [Indexed: 02/07/2023]
|
33
|
Cai LL, Liu P, Li X, Huang X, Ye YQ, Chen FY, Yuan H, Hu FQ, Du YZ. RGD peptide-mediated chitosan-based polymeric micelles targeting delivery for integrin-overexpressing tumor cells. Int J Nanomedicine 2011; 6:3499-508. [PMID: 22282676 PMCID: PMC3265222 DOI: 10.2147/ijn.s26670] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Solid tumors need new blood vessels to feed and nourish them as well as to allow tumor cells to escape into the circulation and lodge in other organs, which is termed "angiogenesis." Some tumor cells within solid tumors can overexpress integrins α(v)β(3) and α(v)β(5), which can specifically recognize the peptide motif Arg-Gly-Asp (RGD). Thus, the targeting of RGD-modified micelles to tumor vasculature is a promising strategy for tumor-targeting treatment. METHODS RGD peptide (GSSSGRGDSPA) was coupled to poly(ethylene glycol)-modified stearic acid-grafted chitosan (PEG-CS-SA) micelles via chemical reaction in the presence of N,N'-Disuccinimidyl carbonate. The critical micelle concentration of the polymeric micelles was determined by measuring the fluorescence intensity of pyrene as a fluorescent probe. The micelle size, size distribution, and zeta potential were measured by light scattering and electrophoretic mobility. Doxorubicin (DOX) was chosen as a model anticancer drug to investigate the drug entrapment efficiency, in vitro drug-release profile, and in vitro antitumor activities of drug-loaded RGD-PEG-CS-SA micelles in cells that overexpress integrins (α(ν)β(3) and α(ν)β(5)) and integrin-deficient cells. RESULTS Using DOX as a model drug, the drug encapsulation efficiency could reach 90%, and the in vitro drug-release profiles suggested that the micelles could be used as a controlled-release carrier for the hydrophobic drug. Qualitative and quantitative analysis of cellular uptake indicated that RGD-modified micelles could significantly increase the DOX concentration in integrin-overexpressing human hepatocellular carcinoma cell line (BEL-7402), but not in human epithelial carcinoma cell line (Hela). The competitive cellular-uptake test showed that the cellular uptake of RGD-modified micelles in BEL-7402 cells was significantly inhibited in the presence of excess free RGD peptides. In vitro cytotoxicity tests demonstrated DOX-loaded RGD-modified micelles could specifically enhance the cytotoxicity against BEL-7402 compared with DOX-loaded PEG-CS-SA and doxorubicin hydrochlorate. CONCLUSION This study suggests that RGD-modified PEG-CS-SA micelles are promising drug carriers for integrin-overexpressing tumor active targeting therapy.
Collapse
Affiliation(s)
- Li-Li Cai
- College of Pharmaceutical Science, Zhejiang University, Hangzhou, People’s Republic of China
| | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Du YZ, Cai LL, Li J, Zhao MD, Chen FY, Yuan H, Hu FQ. Receptor-mediated gene delivery by folic acid-modified stearic acid-grafted chitosan micelles. Int J Nanomedicine 2011; 6:1559-68. [PMID: 21845046 PMCID: PMC3152474 DOI: 10.2147/ijn.s23828] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Cationic polymers have been accepted as effective nonviral vectors for gene delivery with low immunogenicity unlike viral vectors. However, the lack of organ or cell specificity sometimes hampers their application and the modification of polymeric vectors has also shown successful improvements in achieving cell-specific targeting delivery and in promoting intracellular gene transfer efficiency. METHODS A folic acid-conjugated stearic acid-grafted chitosan (FA-CS-SA) micelle, synthesized by a 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide-coupling reaction, was designed for specific receptor-mediated gene delivery. RESULTS Due to the cationic properties of chitosan, the micelles could compact the plasmid DNA (pDNA) to form micelle/pDNA complexes nanoparticles. The particle size and zeta potential of the FA-CS-SA/pDNA complexes with different N/P ratios were 100-200 nm and -20 to -10 mV, respectively. The DNase I protection assay indicated that the complexes can efficiently protect condensed DNA from enzymatic degradation by DNase I. A cytotoxicity study indicated that the micelles exhibited less toxicity in comparison with Lipofectamine™ 2000. Using SKOV3 and A549 as model tumor cells, the cellular uptake of micelles was investigated. CONCLUSION It was found that cellular uptake of FA-CS-SA in SKOV3 cells with higher folate receptor expression was faster than that in A549 cells with a short incubation time. Luciferase assay and green fluorescent protein detection were used to confirm that FA-CS-SA could be an effective gene vector. Transfection efficiency of the FA-CS-SA/pDNA complexes in SKOV3 cells was enhanced up to 2.3-fold compared with that of the CS-SA/pDNA complexes. However, there was no significant difference between the transfection efficiencies of the two complexes in A549 cells. Importantly, the transfection efficiency of FA-CS-SA/pDNA decreased with free FA pretreatment in SKOV3 cells. It was concluded that the increase in transfection efficiency of the FA-CS-SA/pDNA complexes was attributed to folate receptor-mediated endocytosis.
Collapse
Affiliation(s)
- Yong-Zhong Du
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
| | | | | | | | | | | | | |
Collapse
|
35
|
Du YZ, Wang L, Yuan H, Hu FQ. Linoleic acid-grafted chitosan oligosaccharide micelles for intracellular drug delivery and reverse drug resistance of tumor cells. Int J Biol Macromol 2011; 48:215-22. [DOI: 10.1016/j.ijbiomac.2010.11.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2010] [Revised: 10/24/2010] [Accepted: 11/10/2010] [Indexed: 10/18/2022]
|
36
|
Yuan H, Lu LJ, Du YZ, Hu FQ. Stearic acid-g-chitosan polymeric micelle for oral drug delivery: in vitro transport and in vivo absorption. Mol Pharm 2010; 8:225-38. [PMID: 21138243 DOI: 10.1021/mp100289v] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Stearic acid-g-chitosan (low molecular weight chitosan CS-SA) with different amino-substituted degrees was synthesized and evaluated as an oral delivery vehicle in this paper. Synthesized CS-SA with 4.47%, 24.36% and 40.36% amino-substituted degree (SD) could form micelles by self-aggregation in aqueous medium. The critical micelle concentration (CMC) ranged from about 0.16 to 0.25 mg/mL, which decreased with the increased SD of CS-SA. The CS-SA micelles had 33.4-130.9 nm size and 22.9- 48.4 mV zeta potential. CS-SA with higher SD had the smaller size and the higher zeta potential. The permeability and possible transport route of CS-SA micelles across the gastrointestinal tract was investigated by in vitro model Caco-2 cells. The results exhibited that the CS-SA micelles had good permeability, and the permeability enhanced with increasing SD of the CS-SA. The transport of the micelles showed energy, pH and concentration dependent transcytosis process, mainly through macropinocytosis and partly via fluid-phase transcytosis and caveolar route. The reversible decrease in transepithelial electrical resistance (TEER) by treatment of micelles suggested that paracellular transport pathway was another route of the micelles crossing the gastrointestinal tract. Using doxorubicin (DOX) as a model drug, the permeation results further demonstrated that the DOX transport mediated by CS-SA micelles could avoid efflux via P-glycoprotein. In vivo study demonstrated that the micelles could significantly improve the bioavailability of encapsulated drug. The results presented that the CS-SA with higher SD was a promising vehicle for oral drugs.
Collapse
Affiliation(s)
- Hong Yuan
- College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, PR China.
| | | | | | | |
Collapse
|
37
|
Du YZ, Weng Q, Yuan H, Hu FQ. Synthesis and antitumor activity of stearate-g-dextran micelles for intracellular doxorubicin delivery. ACS Nano 2010; 4:6894-6902. [PMID: 20939508 DOI: 10.1021/nn100927t] [Citation(s) in RCA: 131] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Stearate-g-dextran (Dex-SA) was synthesized via an esterification reaction between the carboxyl group of stearic acid (SA) and hydroxyl group of dextran (Dex). Dex-SA could self-assemble to form nanoscaled micelles in aqueous medium. The critical micelle concentration (CMC) depended on the molecular weight of Dex and the graft ratio of SA, which ranged from 0.01 to 0.08 mg mL(-1). Using doxorubicin (DOX) as a model drug, the drug encapsulation efficiency (EE%) using Dex-SA with 10 kDa molecular weight of Dex and 6.33% graft ratio of SA could reach up to 84%. In vitro DOX release from DOX-loaded Dex-SA micelles (Dex-SA/DOX) could be prolonged to 48 h, and adjusted by a different molecular weight of Dex, the graft ratio of SA, or the drug-loading content. Tumor cellular uptake test indicated that Dex-SA micelles had excellent internalization ability, which could deliver DOX into tumor cells. In vitro cytotoxicity tests demonstrated the Dex-SA/DOX micelles could maintain the cytotoxicity of commercial doxorubicin injection against drug-sensitive tumor cells. Moreover, Dex-SA/DOX micelles presented reversal activity against DOX-resistant cells. In vivo antitumor activity results showed that Dex-SA/DOX micelles treatments effectively suppressed the tumor growth and reduced the toxicity against animal body compared with commercial doxorubicin injection.
Collapse
Affiliation(s)
- Yong-Zhong Du
- College of Pharmaceutical Sciences, Zhejiang University, 388 Yuhangtang Road, Hangzhou 310058, P.R. China.
| | | | | | | |
Collapse
|
38
|
Du YZ, Lu P, Yuan H, Zhou JP, Hu FQ. Quaternary complexes composed of plasmid DNA/protamine/fish sperm DNA/stearic acid grafted chitosan oligosaccharide micelles for gene delivery. Int J Biol Macromol 2010; 48:153-9. [PMID: 21035503 DOI: 10.1016/j.ijbiomac.2010.10.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2010] [Revised: 09/30/2010] [Accepted: 10/19/2010] [Indexed: 11/30/2022]
Abstract
Quaternary complexes with condensed core of plasmid DNA, protamine, fish sperm DNA and shell of stearic acid grafted chitosan oligosaccharide (CSO-SA), were prepared. The CSO-SA could self-assemble to form nano-sized micelles in aqueous solution and demonstrated excellent internalization ability of tumor cells. Dynamic light scattering (DLS) measurement and transmission electrostatic microscope (TEM) images showed that quaternary complexes had spherical shape with about 25 nm number average diameter, and the size of quaternary complexes was smaller than that of CSO-SA micelles and CSO-SA micelles/plasmid DNA binary complexes. The transfection efficiencies of quaternary complexes on HEK293 and MCF-7 cells increased with incubation time, and were significantly higher than that of CSO-SA micelles/plasmid DNA binary complexes. The optimal transfection efficiency of quaternary complexes on HEK293 and MCF-7 cells measured by flow cytometer after 96 h was 23.82% and 41.43%, respectively. Whereas, the transfection efficiency of Lipofectamine™ 2000 on HEK293 and MCF-7 cells after 96 h was 32.45% and 33.23%, respectively. The data of luciferease activity measurement showed that the optimal ratio of plasmid DNA:fish sperm DNA:protamine:CSO-SA was 1:1:5:5. The results indicated that the present quaternary complexes were potential non-viral gene delivery system.
Collapse
Affiliation(s)
- Yong-Zhong Du
- College of Pharmaceutical Science, Zhejiang University, 388 Yuhangtang Road, Hangzhou 310058, PR China
| | | | | | | | | |
Collapse
|
39
|
Xu YY, Du YZ, Yuan H, Liu LN, Niu YP, Hu FQ. Improved cytotoxicity and multidrug resistance reversal of chitosan based polymeric micelles encapsulating oxaliplatin. J Drug Target 2010; 19:344-53. [DOI: 10.3109/1061186x.2010.499465] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
40
|
Hu FQ, Xia DX, Lu CF, Chen ZX, Yang GC. A New Non-Cross-Linked Polystyrene Supported 2-Phenylimino-2-oxazolidine Chiral Auxiliary: Synthesis and Application in Asymmetric Alkylation Reactions. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000981] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
41
|
Yuan H, Zhang W, Du YZ, Hu FQ. Ternary nanoparticles of anionic lipid nanoparticles/protamine/DNA for gene delivery. Int J Pharm 2010; 392:224-31. [DOI: 10.1016/j.ijpharm.2010.03.025] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2009] [Revised: 02/08/2010] [Accepted: 03/09/2010] [Indexed: 10/19/2022]
|
42
|
Zhou YY, Du YZ, Wang L, Yuan H, Zhou JP, Hu FQ. Preparation and pharmacodynamics of stearic acid and poly (lactic-co-glycolic acid) grafted chitosan oligosaccharide micelles for 10-hydroxycamptothecin. Int J Pharm 2010; 393:143-51. [PMID: 20420886 DOI: 10.1016/j.ijpharm.2010.04.025] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Revised: 04/08/2010] [Accepted: 04/19/2010] [Indexed: 11/17/2022]
Abstract
Stearic acid (SA) and poly (lactic-co-glycolic acid) (PLGA) grafted chitosan oligosaccharide (SA-CSO-PLGA SCP) tripolymer was synthesized via the reaction between the carboxyl group of SA or PLGA with carboxylic side group, and the amine group of CSO in the presence of 1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC). The degrees of amino-substitution for SA and PLGA were assayed through 2, 4, 6-trinitrobenzene sulfonic acid (TNBS) test and (13)C NMR spectrum, which were 8.15% and 5.82%, respectively; the critical micelle concentrations of SCP in PBS (pH 7.4) and deionized water (DI water) were about 34.9 and 14.5 microg/ml, respectively. Using 10-hydroxycamptothecin (HCPT) as a model drug, the drug-loaded micelles showed above 86% encapsulation efficiency, which not only enhanced the solubility of HCPT in aqueous medium markedly, but also protected the lactone ring of HCPT. Cellular uptakes of SCP micelles against A549, MCF-7 and HepG-2 tumor cells showed a faster cellular internalization. Comparing to the commercial HCPT injection, HCPT-loaded micelles showed higher cytotoxicities against A549, MCF-7 and HepG-2 cells. The increased folds were 22, 18 and 15, respectively. These results suggested the SCP could be applied as a carrier for hydrophobic drugs.
Collapse
Affiliation(s)
- Yue-Yu Zhou
- Department of Pharmaceutics, China Pharmaceutical University, 24 Tongjiaxiang Road, Nanjing 210009, PR China
| | | | | | | | | | | |
Collapse
|
43
|
Du YZ, Ying XY, Wang L, Zhai Y, Yuan H, Yu RS, Hu FQ. Sustained release of ATP encapsulated in chitosan oligosaccharide nanoparticles. Int J Pharm 2010; 392:164-9. [PMID: 20362652 DOI: 10.1016/j.ijpharm.2010.03.050] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2010] [Revised: 03/11/2010] [Accepted: 03/26/2010] [Indexed: 10/19/2022]
Abstract
The chemical cross-linked chitosan oligosaccharide (CSO) nanoparticles containing ATP/CSO ionic complex nano-components were prepared using combination techniques of W/O miniemulsion, chemical cross-linking and ionic complexation. The resulted nanoparticles had about 110 nm diameter and 20 mV surface zeta potential. The ATP loading efficiencies in nanoparticles could reach up to 40.6-69.5%. It was found that the ATP loading efficiency increased with increasing the amount and the molecular weight of chitosan oligosaccharide, and decreased with increasing molar ratio of glutaraldehyde to chitosan oligosaccharide. In vitro ATP release from chemical cross-linked CSO nanoparticles could continue for 24h, and could also be adjusted by the amount and molecular weight of CSO, and the molar ratio of glutaraldehyde to CSO. The higher molecular weight and smaller amount of CSO, and the lower molar ratio of glutaraldehyde to CSO led the slower ATP release rate. Furthermore, it was also found that the CSO nanoparticles could be uptaken by HepG-2 tumor cells, and could be applied for intracellular drug delivery.
Collapse
Affiliation(s)
- Yong-Zhong Du
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China.
| | | | | | | | | | | | | |
Collapse
|
44
|
Abstract
A hydrotropic agent, salicylic acid (SA), was grafted to chitosan oligosaccharide (CSO) backbone to develop a CSO/SA conjugate. The CSO/SA self-assembled to form nanoparticles (NPs) in aqueous medium. The sizes of the NPs were smaller as more SA was grafted and when lower molecular weight CSO was used. The ζ-potentials of all CSO/SA NPs were above 40 mV. The critical aggregation concentrations of NPs decreased from 454.79 to 164.0 μg/mL by increasing the grafted SA content or the CSO Mw. Paclitaxel (PTX)-loaded NPs were prepared by a dialysis method; the particle sizes and ζ-potentials were smaller than the blank NPs. A series of PTX-loaded CSO28,000/SA50% NPs were prepared; as the size decreased or the drug content increased, the in vitro release rate increased. The in vitro cytotoxicity of blank CSO/SA NPs was determined using the MCF-7 cell line. The CSO/SA provides a new means of making a stable delivery for PTX.
Collapse
Affiliation(s)
- Xiao-Hong Wei
- College of Pharmaceutical Science, Zhejiang University Hangzhou, 310058, P. R. China,
| | - Yang-Ping Niu
- College of Pharmaceutical Science, Zhejiang University of Technology Hangzhou, 310032, P. R. China
| | - Yang-Yan Xu
- College of Pharmaceutical Science, Zhejiang University Hangzhou, 310058, P. R. China, College of Pharmaceutical Science, Zhejiang University of Technology Hangzhou, 310032, P. R. China
| | - Yong-Zhong Du
- College of Pharmaceutical Science, Zhejiang University Hangzhou, 310058, P. R. China
| | - Fu-Qiang Hu
- College of Pharmaceutical Science, Zhejiang University Hangzhou, 310058, P. R. China
| | - Hong Yuan
- College of Pharmaceutical Science, Zhejiang University Hangzhou, 310058, P. R. China
| |
Collapse
|
45
|
Du YZ, Wang L, Dong Y, Yuan H, Hu FQ. Characteristics of paclitaxel-loaded chitosan oligosaccharide nanoparticles and their preparation by interfacial polyaddition in O/W miniemulsion system. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2009.10.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
46
|
Hu FQ, Jiang XH, Huang X, Wu XL, Yuan H, Wei XH, Du YZ. Enhanced cellular uptake of chlorine e6 mediated by stearic acid-grafted chitosan oligosaccharide micelles. J Drug Target 2009; 17:384-91. [PMID: 19343607 DOI: 10.1080/10611860902894325] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Chlorines are attractive compounds for photodynamic therapy because of their high absorption in the red wavelength region. The stearic acid-grafted chitosan oligosaccharide (CSO-SA) micelles have been presented as potential candidates for intracellular drug delivery carrier because of their special structure. In this study, CSO-SA micelles were prepared to encapsulate chlorine e6 (Ce6). The physicochemical properties of synthesized CSO-SA micelles were characterized. The critical micelle concentration (CMC) of CSO-SA with 4.96% amino substituted degree (SD %) was about 36.27 +/- 1.51 microg/mL. The Ce6-loaded CSO-SA micelles were then prepared by a dialysis method, and the properties and drug release profiles of Ce6- loaded CSO-SA micelles (CSO-SA/Ce6) were investigated. The loading of Ce6 in the CSO-SA micelles could reach higher drug encapsulation efficiency (%), which was approximately 100%. The size of CSO-SA/Ce6 decreased after the loading of Ce6. The zeta potential of CSO-SA/Ce6 and the drug release rate decreased with the loading content of drug. After the Ce6 molecules were encapsulated into the micelles of CSO-SA, the cellular uptake percentage of Ce6 was much more than that of the free drug. And the cellular uptake percentage of CSO-SA/Ce6 micelles was increased with the incubation time in a short period.
Collapse
Affiliation(s)
- Fu-Qiang Hu
- College of Pharmaceutical Science, Zhejiang University, Hangzhou, People's Republic of China.
| | | | | | | | | | | | | |
Collapse
|
47
|
Du YZ, Xu JG, Wang L, Yuan H, Hu FQ. Preparation and characteristics of hydroxypropyl-β-cyclodextrin polymeric nanocapsules loading nimodipine. Eur Polym J 2009. [DOI: 10.1016/j.eurpolymj.2009.01.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
48
|
|
49
|
Zhao MD, Hu FQ, Du YZ, Yuan H, Chen FY, Lou YM, Yu HY. Coadministration of glycolipid-like micelles loading cytotoxic drug with different action site for efficient cancer chemotherapy. Nanotechnology 2009; 20:055102. [PMID: 19417333 DOI: 10.1088/0957-4484/20/5/055102] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
To reduce the side effects and drug resistance in cancer chemotherapy, we have examined the in vitro efficacy of the combination of paclitaxel (PTX) and doxorubicin (DOX) loaded in nanosized polymeric micelles with glycolipid-like structure, which formed by lipid grafted chitosan. The cytotoxicities of PTX and DOX, either as single agents or in combination, were examined using drug sensitive tumor cells and drug resistant cells. It was found that the 50% inhibition of cellular growth (IC(50)) of PTX and DOX in micelles against drug sensitive cells was lowered about 20-fold and 4-7-fold compared to that of Taxol and DOX solution, respectively. The IC(50) of PTX and DOX in micelles against drug resistant cells was lowered more significantly, and no clear difference was found between drug sensitive and drug resistant cells. The coadministration of PTX and DOX in micelles showed a more conspicuous effect than that of micelles loaded with a single drug. The micelles presented excellent internalization to cancer cells, which results in increased intracellular accumulation of PTX and DOX in its molecular-target site. The coadministration of glycolipid-like micelles loaded with different cytotoxic drugs indicated synergistic effects for drug sensitive cells and drug resistant cells.
Collapse
Affiliation(s)
- Meng-Dan Zhao
- Women Hospital, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
| | | | | | | | | | | | | |
Collapse
|
50
|
Du YZ, Wang L, Yuan H, Wei XH, Hu FQ. Preparation and characteristics of linoleic acid-grafted chitosan oligosaccharide micelles as a carrier for doxorubicin. Colloids Surf B Biointerfaces 2008; 69:257-63. [PMID: 19131223 DOI: 10.1016/j.colsurfb.2008.11.030] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2008] [Revised: 11/19/2008] [Accepted: 11/23/2008] [Indexed: 11/17/2022]
Abstract
The linoleic acid (LA)-grafted chitosan oligosaccharide (CSO) (CSO-LA) was synthesized in the presence of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC), and the effects of molecular weight of CSO and the charged amount of LA on the physicochemical properties of CSO-LA were investigated, such as CMC, graft ratio, size, zeta potential. The results showed that these chitosan derivatives were able to self-assemble and form spherical shape polymeric micelles with the size range of 150.7-213.9nm and the zeta potential range of 57.9-79.9mV, depending on molecular weight of CSO and the charged amount of LA. Using doxorubicin (DOX) as a model drug, the DOX-loaded CSO-LA micelles were prepared by dialysis method. The drug encapsulation efficiencies (EE) of DOX-loaded CSO-LA micelles were as high as about 75%. The sizes of DOX-loaded CSO-LA micelles with 20% charged DOX (relating the mass of CSO-LA) were near 200nm, and the drug loading (DL) capacity could reach up to 15%. The in vitro release studies indicated that the drug release from the DOX-loaded CSO-LA micelles was reduced with increasing the graft ratio of CSO-LA, due to the enhanced hydrophobic interaction between hydrophobic drug and hydrophobic segments of CSO-LA. Moreover, the drug release rate from CSO-LA micelles was faster with the drug loading. These data suggested the possible utilization of the amphiphilic micellar chitosan derivatives as carriers for hydrophobic drugs for improving their delivery and release properties.
Collapse
|