Article(id=1193674746186395753, tenantId=1146029695717560320, journalId=1190317699101192196, issueId=1193674740352119804, articleNumber=1001-2494(2025)06-0620-10, orderNo=null, doi=10.11669/cpj.2025.06.008, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1705593600000, receivedDateStr=2024-01-19, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1762523836894, onlineDateStr=2025-11-07, pubDate=1742572800000, pubDateStr=2025-03-22, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1762523836894, onlineIssueDateStr=2025-11-07, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1762523836894, creator=13701087609, updateTime=1762523836894, updator=13701087609, issue=Issue{id=1193674740352119804, tenantId=1146029695717560320, journalId=1190317699101192196, year='2025', volume='60', issue='6', pageStart='553', pageEnd='662', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1762523835503, creator=13701087609, updateTime=1762524041683, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1193675605205025683, tenantId=1146029695717560320, journalId=1190317699101192196, issueId=1193674740352119804, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1193675605205025684, tenantId=1146029695717560320, journalId=1190317699101192196, issueId=1193674740352119804, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=620, endPage=629, ext={EN=ArticleExt(id=1193674746576466030, articleId=1193674746186395753, tenantId=1146029695717560320, journalId=1190317699101192196, language=EN, title=Preparation and Antibacterial Activity of Polymyxin B Sulfate Multivesicular Liposomes, columnId=null, journalTitle=Chinese Pharmaceutical Journal, columnName=null, runingTitle=null, highlight=null, articleAbstract=

OBJECTIVE To prepare polymyxin B sulfate multivesicular liposomes (PMB-MVLs), optimize their formulation, and their quality, stability, release and investigate their antibacterial activity in vitro. METHODS The PMB-MVLs were prepared by the double-emulsion method. The response surface method of Box-Behnken design was used to optimize the initial prescription. High performance liquid chromatography method was established to quantitatively analyze PMB in PMB-MVLs. The physicochemical properties, the in vitro drug release behavior, in vitro antimicrobial activity and formulation safety of PMB-MVLs were investigated. RESULTS The appearance of PMB-MVLs prepared by optimal prescription were non-concentric spherical vesicles with uniform size. The encapsulation efficiency of PMB-MVLs were (69.521±1.531)%. The average particle size was (5.84±1.42) μm, and the average Zeta potential was (-26.77±0.55)mV. The PMB-MVLs showed good stability when stored at 4 ℃ for one month. The results showed that PMB-MVLs were released continuously for 72 h in vitro, and there was no sudden release effect. The in vitro antibacterial activities of PMB-MVLs on E.coli and P.aeruginosa were significantly stronger than those of the free PMB. And PMB-MVLs has no risk of hemolysis within its range of antimicrobial activity. CONCLUSION The slow-release PMB-MVLs are successfully prepared with uniform particle size, high encapsulation efficiency, and enhanced antibacterial activity.

, correspAuthors=Xuefan CHEN, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Yuxin LU, Rui JIN, Yawen WANG, Xuefan CHEN), CN=ArticleExt(id=1193675038592299701, articleId=1193674746186395753, tenantId=1146029695717560320, journalId=1190317699101192196, language=CN, title=硫酸多黏菌素B多囊脂质体的制备及抗菌活性研究, columnId=1190352405612040510, journalTitle=中国药学杂志, columnName=论著, runingTitle=null, highlight=null, articleAbstract=

目的 制备硫酸多黏菌素B多囊脂质体(polymyxin B sulfate multivesicular liposomes, PMB-MVLs),优化其处方并对其质量、稳定性、体外释放和体外抗菌活性进行考察。方法 采用复乳法制备PMB-MVLs,以包封率为指标,采用Box-Behnken效应面法对处方进行优化;采用高效液相色谱法对PMB-MVLs中PMB进行定量分析;对其理化性质、药物体外释放行为、体外抗菌活性和制剂安全性进行考察。结果 采用最优处方所制的PMB-MVLs外观呈无数个非同心囊泡堆积而成的球形,大小较均匀,包封率为(69.521±1.531)%,平均粒径为(5.84±1.42)μm,平均Zeta电位为(-26.77±0.55)mV,其在4 ℃下储存1个月稳定性良好;PMB-MVLs在体外持续释放达72 h,无突释效应;体外抗菌实验结果显示,相较于PMB溶液,PMB-MVLs对E.coliP.aeruginosa细菌具有更好的抗菌效果,并且在其抗菌活性范围内无溶血风险。结论 成功制得具有缓释作用的PMB-MVLs,其粒径分布均匀、包封率高,具有增强的抗菌活性。

, correspAuthors=陈雪帆, authorNote=null, correspAuthorsNote=
*陈雪帆,男,硕士,高级工程师 研究方向:化学药、中药及原辅包质量 Tel:13819183280
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卢宇欣,女,硕士研究生 研究方向:药用辅料质量控制

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卢宇欣,女,硕士研究生 研究方向:药用辅料质量控制

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卢宇欣,女,硕士研究生 研究方向:药用辅料质量控制

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Biosci Rep, 2002, 22(2): 129-150., articleTitle=Biophysical aspects of using liposomes as delivery vehicles, refAbstract=null)], funds=[Fund(id=1193713003452399948, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, awardId=2023Y002, language=CN, fundingSource=国家药典委员会药品标准制修订研究课题资助(2023Y002), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1193712998729613526, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, xref=null, ext=[AuthorCompanyExt(id=1193712998738002135, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, companyId=1193712998729613526, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Green Pharmaceutical Collaborative Innovation Center, Zhejiang University of Technology, Hangzhou 310014, China), AuthorCompanyExt(id=1193712998746390744, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, companyId=1193712998729613526, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=浙江工业大学绿色制药协同创新中心, 杭州 310014)])], figs=[ArticleFig(id=1193713001082618124, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=EN, label=Fig.1, caption=HPLC chromatograms of PMB control solution(A), PMB-MVLs solution(B), and Blank-MVLs solution(C)

compound 1-PMB-B2; compound 2-PMB-B1-I; compound 3-PMB-B1.

, figureFileSmall=cSLUZrSTZ+bdS/vB56uMpA==, figureFileBig=gahI6u+A+Y3L3EshN+JGwQ==, tableContent=null), ArticleFig(id=1193713001153921294, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=图1, caption=硫酸多黏菌素B(PMB)对照溶液(A)、硫酸多黏菌素B多囊脂质体(PMB-MVLs)供试品溶液(B)和空白MVLs溶液(C)的高效液相色谱(HPLC)图

化合物1-PMB-B2;化合物2-PMB-B1-I;化合物3-PMB-B1

, figureFileSmall=cSLUZrSTZ+bdS/vB56uMpA==, figureFileBig=gahI6u+A+Y3L3EshN+JGwQ==, tableContent=null), ArticleFig(id=1193713001242001680, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=EN, label=Fig.2, caption=Response surface and contour of influence of various factors on PMB-MVLs suspension encapsulation efficiency, figureFileSmall=Rt3FiLfvIw+96phcBMSdWQ==, figureFileBig=XpppOGmqtTHPfViw+0h+cQ==, tableContent=null), ArticleFig(id=1193713001309110546, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=图2, caption=各因素对PMB-MVLs混悬液包封率影响的响应面和等高线, figureFileSmall=Rt3FiLfvIw+96phcBMSdWQ==, figureFileBig=XpppOGmqtTHPfViw+0h+cQ==, tableContent=null), ArticleFig(id=1193713001388802324, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=EN, label=Fig.3, caption=Micrograph of the × 200 (A) and ×400 (B) of the PMB-MVLs, figureFileSmall=wup48bgjhxjmq37yssQ1ZQ==, figureFileBig=N3asICgzcSFMc+J2/0StmA==, tableContent=null), ArticleFig(id=1193713001472688406, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=图3, caption=PMB-MVLs放大200倍(A)和放大400倍(B)的显微镜图, figureFileSmall=wup48bgjhxjmq37yssQ1ZQ==, figureFileBig=N3asICgzcSFMc+J2/0StmA==, tableContent=null), ArticleFig(id=1193713001539797272, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=EN, label=Fig.4, caption=Particle size distribution (A) and Zeta potential (B) of PMB-MVLs

Dv(10), Dv(50), and Dv (90) respectively represent the particle sizes corresponding to cumulative particle size distributions of 10%, 50%, and 90%.

, figureFileSmall=yMps3HEvIi3ADP8HtDBPFg==, figureFileBig=nmBYDzJ5VTkawMvqHfgDWw==, tableContent=null), ArticleFig(id=1193713001598517530, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=图4, caption=PMB-MVLs 粒径分布图(A)和表面Zeta电位图(B)

Dv(10)、Dv(50)、Dv(90)分别表示累计粒度分布数达到10%、50%、90%时所对应的粒径。

, figureFileSmall=yMps3HEvIi3ADP8HtDBPFg==, figureFileBig=nmBYDzJ5VTkawMvqHfgDWw==, tableContent=null), ArticleFig(id=1193713001665626396, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=EN, label=Fig.5, caption=In vitro release profiles of free PMB and PMB-MVLs in pH 7.4 release medium. n=3,$\bar{x} \pm s$, figureFileSmall=p0C7yrwh0efGh+es3MAlug==, figureFileBig=2zvPEPIjknEaPux+LImq5g==, tableContent=null), ArticleFig(id=1193713001741123870, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=图5, caption=PMB溶液与PMB-MVLs混悬液在pH 7.4释放介质中体外释放曲线。n=3,$\bar{x} \pm s$, figureFileSmall=p0C7yrwh0efGh+es3MAlug==, figureFileBig=2zvPEPIjknEaPux+LImq5g==, tableContent=null), ArticleFig(id=1193713001804038432, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=EN, label=Fig.6, caption=Study on the MIC of PMB and PMB-MVLS at different concentration, figureFileSmall=CCxlFTFSDAXWt75O2C82KQ==, figureFileBig=GemCMqJPnDUVboMJDWb6Iw==, tableContent=null), ArticleFig(id=1193713001854370082, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=图6, caption=不同浓度PMB和PMB-MVLs的最低抑菌浓度(MIC)考察, figureFileSmall=CCxlFTFSDAXWt75O2C82KQ==, figureFileBig=GemCMqJPnDUVboMJDWb6Iw==, tableContent=null), ArticleFig(id=1193713001929867556, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=EN, label=Fig.7, caption=Study on the MBC of PMB and PMB-MVLS at different concentrations

A-E.coil; B-P.aeruginosa

A-E.coil; B-P.aeruginosa.

, figureFileSmall=QaXQ4eGuXOsDr8XddQx4Kw==, figureFileBig=xoyl2lLEVw8t+N3HStqjOQ==, tableContent=null), ArticleFig(id=1193713001988587814, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=图7, caption=不同浓度PMB和PMB-MVLs的最低杀菌浓度(MBC)考察, figureFileSmall=QaXQ4eGuXOsDr8XddQx4Kw==, figureFileBig=xoyl2lLEVw8t+N3HStqjOQ==, tableContent=null), ArticleFig(id=1193713002059890984, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=EN, label=Fig.8, caption=Determination of the bacterial growth inhibition rate at 24 h. n=3,$\bar{x} \pm s$

1)P<0.05,2)P<0.01, vs Blank-MVLs group.

, figureFileSmall=LeFCqlABKsR1XZbYDLDdWQ==, figureFileBig=S6PY5/ePf7cQQ8FYGeH9Iw==, tableContent=null), ArticleFig(id=1193713002118611242, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=图8, caption=PMB原料药组和PMB-MVLs制剂组24 h细菌生长抑制率的测定。n=3,$\bar{x} \pm s$

与空白MVLs组比,1)P<0.05,2)P<0.01。

, figureFileSmall=LeFCqlABKsR1XZbYDLDdWQ==, figureFileBig=S6PY5/ePf7cQQ8FYGeH9Iw==, tableContent=null), ArticleFig(id=1193713002181525804, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=EN, label=Fig.9, caption=Determination of time-growth curve of Gram-negative bacteria, figureFileSmall=ByoNL04BuTcjAyQ7/l2PXQ==, figureFileBig=1RRttF3SPY10/W+sO17zXA==, tableContent=null), ArticleFig(id=1193713002248634670, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=图9, caption=PMB原料药组和PMB-MVLs制剂组细菌生长抑制率-时间的测定, figureFileSmall=ByoNL04BuTcjAyQ7/l2PXQ==, figureFileBig=1RRttF3SPY10/W+sO17zXA==, tableContent=null), ArticleFig(id=1193713002336715056, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=EN, label=Fig.10, caption=PMB-MVLs at different concentrations(A) and hemolysis percentage determination results(B). n=3,$\bar{x} \pm s$

Numbers 1-7 correspond to the test tube numbers in Tab.6.

, figureFileSmall=0XQAb1k4AAINsVPhkIJdMQ==, figureFileBig=e9FaUaFudNesO0uXKsXzrg==, tableContent=null), ArticleFig(id=1193713002412212530, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=图10, caption=不同浓度PMB-MVLs溶血情况观察图(A)及红细胞溶血率测定结果(B)。n=3,$\bar{x} \pm s$

编号1~7对应表6中试管编号及配比。

, figureFileSmall=0XQAb1k4AAINsVPhkIJdMQ==, figureFileBig=e9FaUaFudNesO0uXKsXzrg==, tableContent=null), ArticleFig(id=1193713002470932788, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=EN, label=Tab.1, caption=

The design of factors and level by Box-Behnken method

, figureFileSmall=null, figureFileBig=null, tableContent=
Level A
DOPC∶CH(mm)
B
DOPC∶Tricaprylin(mm)
C
L-Lysine/mmol·L-1
-1 1.5∶1 2∶1 20
0 2∶1 4∶1 40
1 2.5∶1 6∶1 60
), ArticleFig(id=1193713002546430262, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=表1, caption=

Box-Behnken响应面法的因素水平设计表

, figureFileSmall=null, figureFileBig=null, tableContent=
Level A
DOPC∶CH(mm)
B
DOPC∶Tricaprylin(mm)
C
L-Lysine/mmol·L-1
-1 1.5∶1 2∶1 20
0 2∶1 4∶1 40
1 2.5∶1 6∶1 60
), ArticleFig(id=1193713002617733432, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=EN, label=Tab.2, caption=

Experimental design and results of optimizing the formulation of PMB-MVLs by Box-Behnken method

, figureFileSmall=null, figureFileBig=null, tableContent=
No. Run Factor 1(A) Factor 2(B) Factor 3(C) EE/%(Y)
6 1 2.5 4 20 25.304
4 2 2.5 6 40 27.373
15 3 2 4 40 39.682
1 4 1.5 2 40 27.913
13 5 2 4 40 39.092
7 6 1.5 4 60 23.710
17 7 2 4 40 41.146
12 8 2 6 60 25.599
10 9 2 6 20 29.224
3 10 1.5 6 40 27.866
2 11 2.5 2 40 24.970
5 12 1.5 4 20 28.875
14 13 2 4 40 38.918
9 14 2 2 20 27.917
8 15 2.5 4 60 28.203
16 16 2 4 40 40.884
11 17 2 2 60 28.070
), ArticleFig(id=1193713002697425210, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=表2, caption=

Box-Behnken效应面法优化PMB-MVLs处方的实验设计与结果

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No. Run Factor 1(A) Factor 2(B) Factor 3(C) EE/%(Y)
6 1 2.5 4 20 25.304
4 2 2.5 6 40 27.373
15 3 2 4 40 39.682
1 4 1.5 2 40 27.913
13 5 2 4 40 39.092
7 6 1.5 4 60 23.710
17 7 2 4 40 41.146
12 8 2 6 60 25.599
10 9 2 6 20 29.224
3 10 1.5 6 40 27.866
2 11 2.5 2 40 24.970
5 12 1.5 4 20 28.875
14 13 2 4 40 38.918
9 14 2 2 20 27.917
8 15 2.5 4 60 28.203
16 16 2 4 40 40.884
11 17 2 2 60 28.070
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Results of variance analysis by Box-Behnken method

, figureFileSmall=null, figureFileBig=null, tableContent=
Source Sum of squares df Mean square F P
Model 612.82 9 68.09 57.56 <0.000 1
A 0.790 0 1 0.790 0 0.667 9 0.440 7
B 0.177 6 1 0.177 6 0.150 1 0.709 9
C 4.12 1 4.12 3.48 0.104 4
AB 1.50 1 1.50 1.27 0.297 2
AC 16.26 1 16.26 13.74 0.007 6
BC 3.57 1 3.57 3.02 0.126 0
A2 209.08 1 209.08 176.75 <0.000 1
B2 144.94 1 144.94 122.53 <0.000 1
C2 171.10 1 171.10 144.65 <0.000 1
Residual 8.28 7 1.18
Lack of fit 4.10 3 1.37 1.31 0.387 0
Pure error 4.18 4 1.04
Cor total 621.10 16
), ArticleFig(id=1193713002873585982, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=表3, caption=

Box-Behnken效应面法方差分析结果

, figureFileSmall=null, figureFileBig=null, tableContent=
Source Sum of squares df Mean square F P
Model 612.82 9 68.09 57.56 <0.000 1
A 0.790 0 1 0.790 0 0.667 9 0.440 7
B 0.177 6 1 0.177 6 0.150 1 0.709 9
C 4.12 1 4.12 3.48 0.104 4
AB 1.50 1 1.50 1.27 0.297 2
AC 16.26 1 16.26 13.74 0.007 6
BC 3.57 1 3.57 3.02 0.126 0
A2 209.08 1 209.08 176.75 <0.000 1
B2 144.94 1 144.94 122.53 <0.000 1
C2 171.10 1 171.10 144.65 <0.000 1
Residual 8.28 7 1.18
Lack of fit 4.10 3 1.37 1.31 0.387 0
Pure error 4.18 4 1.04
Cor total 621.10 16
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Storage stability of PMB-MVLs. n=3

, figureFileSmall=null, figureFileBig=null, tableContent=
t/d 4 ℃ 25 ℃
EE/% Size/μm EE/% Size/μm
0 68.86 5.42 68.86 5.42
10 68.25 5.58 66.24 5.60
20 66.10 6.08 65.22 7.37
30 65.11 7.43 54.49 12.30
), ArticleFig(id=1193713003007803714, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=表4, caption=

PMB-MVLs混悬液稳定性考察结果。n=3

, figureFileSmall=null, figureFileBig=null, tableContent=
t/d 4 ℃ 25 ℃
EE/% Size/μm EE/% Size/μm
0 68.86 5.42 68.86 5.42
10 68.25 5.58 66.24 5.60
20 66.10 6.08 65.22 7.37
30 65.11 7.43 54.49 12.30
), ArticleFig(id=1193713003062329668, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=EN, label=Tab.5, caption=

Results of fitting models for in vitro release profile

, figureFileSmall=null, figureFileBig=null, tableContent=
Fitting
models
Fits the equation
PMB PMB-MVLs
Zero order release M=6.357 67t+37.424 42
(r2=0.768 82)
M=1.069 04t+22.721 14
(r2=0.734 85)
First order release Mt=98.626 61(1-e-0.431 92t)
(r2=0.995 94)
Mt=81.860 53(1-e-0.090 9t)
(r2=0.986 72)
Higuchi Mt=28.650 66X1/2+11.019 84
(r2=0.905 76)
Mt=10.769 04X1/2+5.129 78
(r2=0.914 57)
), ArticleFig(id=1193713003162992965, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=表5, caption=

体外释放曲线拟合模型的结果

, figureFileSmall=null, figureFileBig=null, tableContent=
Fitting
models
Fits the equation
PMB PMB-MVLs
Zero order release M=6.357 67t+37.424 42
(r2=0.768 82)
M=1.069 04t+22.721 14
(r2=0.734 85)
First order release Mt=98.626 61(1-e-0.431 92t)
(r2=0.995 94)
Mt=81.860 53(1-e-0.090 9t)
(r2=0.986 72)
Higuchi Mt=28.650 66X1/2+11.019 84
(r2=0.905 76)
Mt=10.769 04X1/2+5.129 78
(r2=0.914 57)
), ArticleFig(id=1193713003234296135, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=EN, label=Tab.6, caption=

The result of hemolytic experiment of PMB-MVLs

, figureFileSmall=null, figureFileBig=null, tableContent=
Item Tube number
1 2 3 4 5 6 7
2% RBC suspension/mL 2.5 2.5 2.5 2.5 2.5 2.5 2.5
Normal saline/mL 2.0 2.1 2.2 2.3 2.4 2.5 0
Purified water/mL 0 0 0 0 0 0 2.5
PMB-MVLs/mL 0.5 0.4 0.3 0.2 0.1 0 0
0 h - - - - - - ++
1 h - - - - - - ++
3 h - - - - - - ++
), ArticleFig(id=1193713003301405000, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1193674746186395753, language=CN, label=表6, caption=

PMB-MVLs溶血性实验结果

, figureFileSmall=null, figureFileBig=null, tableContent=
Item Tube number
1 2 3 4 5 6 7
2% RBC suspension/mL 2.5 2.5 2.5 2.5 2.5 2.5 2.5
Normal saline/mL 2.0 2.1 2.2 2.3 2.4 2.5 0
Purified water/mL 0 0 0 0 0 0 2.5
PMB-MVLs/mL 0.5 0.4 0.3 0.2 0.1 0 0
0 h - - - - - - ++
1 h - - - - - - ++
3 h - - - - - - ++
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硫酸多黏菌素B多囊脂质体的制备及抗菌活性研究
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卢宇欣 , 金锐 , 王娅雯 , 陈雪帆 *
中国药学杂志 | 论著 2025,60(6): 620-629
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中国药学杂志 | 论著 2025, 60(6): 620-629
硫酸多黏菌素B多囊脂质体的制备及抗菌活性研究
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卢宇欣, 金锐, 王娅雯, 陈雪帆*
作者信息
  • 浙江工业大学绿色制药协同创新中心, 杭州 310014
  • 卢宇欣,女,硕士研究生 研究方向:药用辅料质量控制

通讯作者:

*陈雪帆,男,硕士,高级工程师 研究方向:化学药、中药及原辅包质量 Tel:13819183280
Preparation and Antibacterial Activity of Polymyxin B Sulfate Multivesicular Liposomes
Yuxin LU, Rui JIN, Yawen WANG, Xuefan CHEN*
Affiliations
  • Green Pharmaceutical Collaborative Innovation Center, Zhejiang University of Technology, Hangzhou 310014, China
出版时间: 2025-03-22 doi: 10.11669/cpj.2025.06.008
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目的 制备硫酸多黏菌素B多囊脂质体(polymyxin B sulfate multivesicular liposomes, PMB-MVLs),优化其处方并对其质量、稳定性、体外释放和体外抗菌活性进行考察。方法 采用复乳法制备PMB-MVLs,以包封率为指标,采用Box-Behnken效应面法对处方进行优化;采用高效液相色谱法对PMB-MVLs中PMB进行定量分析;对其理化性质、药物体外释放行为、体外抗菌活性和制剂安全性进行考察。结果 采用最优处方所制的PMB-MVLs外观呈无数个非同心囊泡堆积而成的球形,大小较均匀,包封率为(69.521±1.531)%,平均粒径为(5.84±1.42)μm,平均Zeta电位为(-26.77±0.55)mV,其在4 ℃下储存1个月稳定性良好;PMB-MVLs在体外持续释放达72 h,无突释效应;体外抗菌实验结果显示,相较于PMB溶液,PMB-MVLs对E.coliP.aeruginosa细菌具有更好的抗菌效果,并且在其抗菌活性范围内无溶血风险。结论 成功制得具有缓释作用的PMB-MVLs,其粒径分布均匀、包封率高,具有增强的抗菌活性。

硫酸多黏菌素B  /  多囊脂质体  /  复乳法  /  Box-Behnken设计  /  体外抗菌

OBJECTIVE To prepare polymyxin B sulfate multivesicular liposomes (PMB-MVLs), optimize their formulation, and their quality, stability, release and investigate their antibacterial activity in vitro. METHODS The PMB-MVLs were prepared by the double-emulsion method. The response surface method of Box-Behnken design was used to optimize the initial prescription. High performance liquid chromatography method was established to quantitatively analyze PMB in PMB-MVLs. The physicochemical properties, the in vitro drug release behavior, in vitro antimicrobial activity and formulation safety of PMB-MVLs were investigated. RESULTS The appearance of PMB-MVLs prepared by optimal prescription were non-concentric spherical vesicles with uniform size. The encapsulation efficiency of PMB-MVLs were (69.521±1.531)%. The average particle size was (5.84±1.42) μm, and the average Zeta potential was (-26.77±0.55)mV. The PMB-MVLs showed good stability when stored at 4 ℃ for one month. The results showed that PMB-MVLs were released continuously for 72 h in vitro, and there was no sudden release effect. The in vitro antibacterial activities of PMB-MVLs on E.coli and P.aeruginosa were significantly stronger than those of the free PMB. And PMB-MVLs has no risk of hemolysis within its range of antimicrobial activity. CONCLUSION The slow-release PMB-MVLs are successfully prepared with uniform particle size, high encapsulation efficiency, and enhanced antibacterial activity.

polymyxin B sulfate  /  multivesicular liposome  /  double-emulsion method  /  Box-Behnken design  /  in vitro antibacterial activity
卢宇欣, 金锐, 王娅雯, 陈雪帆. 硫酸多黏菌素B多囊脂质体的制备及抗菌活性研究. 中国药学杂志, 2025 , 60 (6) : 620 -629 . DOI: 10.11669/cpj.2025.06.008
Yuxin LU, Rui JIN, Yawen WANG, Xuefan CHEN. Preparation and Antibacterial Activity of Polymyxin B Sulfate Multivesicular Liposomes[J]. Chinese Pharmaceutical Journal, 2025 , 60 (6) : 620 -629 . DOI: 10.11669/cpj.2025.06.008
多黏菌素类抗生素是对由多黏芽孢杆菌菌株培养物中分离获得的一系列肽类抗生素的统称,包括:多黏菌素A、B、C、D、E等[1],其中多黏菌素B和E于1959年被批准作为抗菌药物用于临床,临床常用其硫酸盐注射剂[2]。硫酸多黏菌素B(polymyxin B sulfate, PMB)主要作用于细菌的细胞膜,对多种革兰阴性菌具有很强的抗菌活性[3],但由于抗菌谱窄,且存在肾毒性和神经毒性,使得PMB的临床应用自20世纪70年代起迅速减少。也正是由于过去几十年中使用较少,其依然保留了对多重耐药性革兰阴性菌的抗菌活性[4],现常被用作治疗革兰阴性菌的最后一道防线而再次被重视。目前市售的PMB产品主要包括药品和原料药两种形式。
多囊脂质体(multivesicular liposomes,MVLs)是采用储库泡沫技术(DepofoamTM)制备的一种新型脂质体,其内部由若干个囊泡腔室以非同心圆的形式构成,呈现蜂窝状结构[5-6]。与普通脂质体相比,MVLs稳定性好、包封体积大、渗漏率低[7]。经注射给药后,能在注射部位形成药物储库而实现药物的缓慢释放,延长药物半衰期,从而减少注射次数,降低毒副作用,提高患者顺应性[8]
本研究以PMB为模型药物,以多囊脂质体作为载体材料,制备PMB多囊脂质体(polymyxin B sulfate multivesicular liposomes, PMB-MVLs)。相比于注射用硫酸多黏菌素B,PMB-MVLs具有多方面的优点:①提高生物利用度。PMB-MVLs能够通过脂质体的包裹作用,提高药物在体内的稳定性和溶解度,从而增加药物的生物利用度,这意味着患者在使用相同剂量的药物时,能够获得更高的治疗效果。②减少药物毒性。脂质体作为一种载体系统,能够减少PMB对肾脏和其他器官的毒性作用,降低药物的副作用。③增强靶向性。PMB-MVLs可以通过特定的脂质组成和表面修饰,实现对感染部位的靶向输送,这使得药物能够更准确地作用于感染部位,提高治疗效果并减少不必要的药物暴露。④延长药物作用时间。脂质体包裹的PMB能够在体内缓慢释放,从而延长药物的作用时间,这有助于减少给药频率,提高患者的便利性。此外,PMB-MVLs除了治疗革兰阴性杆菌引起的严重感染外,还可以提高药物的靶向性和生物利用度,减少细菌对药物的耐药性,这对于当前抗生素耐药性日益严重的问题具有重要意义。
本研究采用复乳法制备PMB-MVLs,对其处方工艺进行优化,并对该制剂进行理化性质表征、稳定性、体外释放、体外抗菌活性和安全性研究。
Agilent 1260型高效液相色谱仪(美国Agilent公司);UV-2250型紫外分光光度计(日本SHIMADZU公司);JL-150W型超声波细胞破碎仪(上海靳澜仪器制造有限公司);1-14K型台式高速冷冻离心机(德国SIGMZ公司);MS3型数显旋涡振荡器(德国IKA公司);CX31型多功能显微镜(日本OLYMPUS 公司);Mastersize 3000型激光粒度仪、ZS90型激光粒度仪及表面电位仪(英国马尔文仪器公司);DNP-9272Y型细菌恒温培养箱(上海精宏实验设备有限公司);BKQ-Z75I型立式压力蒸汽灭菌锅(山东博科科学仪器有限公司);Synergy LX型多功能酶标仪(美国伯腾仪器有限公司)。
PMB(99%,华东医药股份有限公司);二油酰基卵磷脂(DOPC,≥94%);三辛酸甘油酯(99%,德国Lipoid公司);胆固醇(CH,分析纯,上海克拉玛尔试剂有限公司);二棕榈酰磷脂酰甘油(DPPG,99%,上海艾伟拓医药科技有限公司);L-赖氨酸(>97%,上海韶远试剂有限公司);Triton X-100(上海阿拉丁生化科技股份有限公司);铜绿假单胞菌和大肠杆菌(杭州治枫科技有限公司);肉汤培养基(LB,北京奥博星生物技术有限责任公司);胰酪大豆胨液体培养基(TSB,上海博微生物科技有限公司);二氯甲烷、氯仿、无水硫酸钠和其他试剂均为分析纯;乙腈为色谱纯。
本研究采用复乳法制备PMB-MVLs[9-10]。具体步骤如下:将PMB溶解于2 mL质量分数为7%的葡萄糖溶液中,作为内水相;称取处方量的DOPC、CH、DPPG和三辛酸甘油酯溶于等体积的二氯甲烷/氯仿(3∶1)中作为油相。将内水相缓慢注入持续搅拌的油相中,在冰水浴条件下300 W探头超声乳化形成稳定的油包水(W/O)型初乳。用注射器吸取W/O型初乳快速注入含5%葡萄糖和40 mmol·L-1 L-赖氨酸的外水相中,涡旋震荡形成水包油包水(W/O/W)型复乳,将复乳转移至250 mL锥形瓶中,置于37 ℃水浴上,同时表面通氮气除去有机溶剂,即得PMB-MVLs混悬液。最后取PMB-MVLs混悬液,与等体积生理盐水混匀,3 000 r·min-1离心5 min,收集沉淀部分,用生理盐水同法洗涤沉淀3次并稀释至适当浓度即得PMB-MVLs样品。
色谱柱为Agilent ZORBAX Eclipse XDB-C18(4.6 mm×150 mm,5 μm);流动相为硫酸钠溶液(取4.46 g无水硫酸钠溶解在900 mL水中,用稀磷酸调节pH值至2.3后用水稀释至1 000 mL)-乙腈(80∶20);柱温为30 ℃;检测波长为215 nm;进样量为20 μL;流速为1.0 mL·min-1
精密量取1 mL PMB-MVLs混悬液至5 mL量瓶中,加入体积分数10% Triton X-100溶液2 mL,摇匀后超声破乳10 min,加流动相定容至刻度,摇匀后经0.45 μm微孔滤膜过滤即得。
以不含PMB的空白MVLs作为空白溶液,以PMB溶液作为对照品溶液,以PMB-MVLs混悬液作为样品溶液,按“2.2.1”项下色谱条件进样测定,记录色谱图(图1)。由图1可见,硫酸多黏菌素B1、B2、B1-I峰的保留时间分别约为34、15、27 min,本研究以主要成分B1为分析对象,其峰形良好,空白MVLs中DOPC、CH和三辛酸甘油酯等脂质材料对PMB的测定无干扰,表明该分析方法具有良好的专属性。
取0.01、0.10、0.20、0.50、1.0、1.50、2.00 mg·mL-1系列质量浓度的PMB对照品溶液,按“2.2.1”项下色谱条件分别进样检测。选择纵坐标为峰面积(A),横坐标为质量浓度(ρ)进行线性回归,得回归方程为A=96.283 32ρ-0.064 96(r2=0.999 97)。表明PMB在0.01~2.00 mg·mL-1内线性关系良好,可用于PMB质量浓度的计算。取1.0 mg·mL-1的PMB对照品溶液按照“2.2.1”项下色谱条件连续重复进样6次,PMB峰面积相对标准偏差(RSD)值为0.17%,小于2%,表明该分析方法进样精密度良好。
精密称取PMB原料药50 mg,加流动相稀释制成质量浓度为5.0 mg·mL-1的PMB储备液。取空白MVLs混悬液2 mL,分别加入PMB储备液1.0、2.0、4.0 mL至10 mL量瓶中,加入体积分数10% Triton X-100溶液2 mL破乳,加流动相定容至刻度,配制成质量浓度为0.5、1.0、2.0 mg·mL-1的溶液各3份,按“2.2.1”项下色谱条件分别进样测定。结果表明,低、中、高3个质量浓度的平均回收率分别为96.64%、94.42%、96.43%,回收率的RSD均值为0.25%,表明该方法准确度良好。
根据文献[11-12]采用低速离心法测定多囊脂质体的包封率。取PMB-MVLs混悬液2 mL置于10 mL量瓶内,加入体积分数10% Triton X-100溶液2 mL破乳,再加入生理盐水定容至刻度,按“2.2.1”项下色谱条件进样测定,测得PMB-MVLs中总药含量为M。另取同批次同体积的PMB-MVLs混悬液于3 000 r·min-1离心5 min后弃去上清液,将沉淀用生理盐水洗涤3次,将沉淀转移至10 mL量瓶内,加入体积分数10% Triton X-100溶液2 mL破乳,再加入生理盐水定容至刻度,测定包封药物含量即M。按公式1计算包封率(EE)。
EE(%)= M M ×100%
在综合分析了预实验结果和相关文献实验结果的基础上[13-15],确定3个影响PMB-MVLs包封率的主要因素:DOPC与CH质量比(A)、DOPC与三辛酸甘油酯质量比(B)和外水相中L-赖氨酸的物质的量(C)作为考察对象,采用Box-Behnken响应面法设计实验,每个因素3个水平,以包封率为评价指标(Y),具体因素与水平见表1。采用Design-Expert 13软件生成17组试验方案筛选最优处方,Box-Behnken设计与结果见表2
利用Design-Expert 13软件对各因素及响应值进行回归分析,得到拟合方程为Y=39.944 4-0.314 25A+0.149B-0.717 25C+0.612 5AB+2.016AC-0.944 5BC-7.046 7A2-5.867 2B2-6.374 7C2(r2=0.986 7,P<0.01,失拟项P>0.05)。由表3方差分析结果可知,模型P<0.01,表明达到极其显著的水平。失拟项P>0.05,表明该方程能很好拟合和预测各因素与Y的关系。此外,该模型相关系数较高(r2=0.986 7),变异系数(CV)为3.52%,小于<4%,表明所拟合的模型具有很高的精密度和适用性,可用此模型对PMB-MVLs进行预测和分析。
实验数据分析采用Design-Expert 13软件,为追求Y的最大化,对模型进一步处理,绘制各因素对Y的等高线图和3D效应面图(图2)。由图2效应面图可知,包封率随着DOPC与CH质量比、DOPC与三辛酸甘油酯质量比和L-赖氨酸物质的量浓度的增加先增加后减小。本实验以更高的包封率为筛选目标,通过响应面优化预测最佳处方是:DOPC∶CH=2.00∶1,DOPC∶三辛酸甘油酯=4.03∶1,L-赖氨酸物质的量浓度为38.76 mmol·L-1,模型预测包封率为39.97%。
为进一步验证所建立模型预测结果与实际实验结果是否相符,以软件预测的最优处方平行制备3批PMB-MVLs混悬液,测定包封率为(40.37±0.48)%。实测值与预测值的相对误相对偏差小于2%,说明模型拟合成功,该制备处方条件稳定可靠。
利用光学显微镜观察PMB-MVLs粒子形态,图3中可见PMB-MVLs形状呈球形,内部由许多紧密排列的非同心囊泡构成,大小较均匀,无磷脂碎片。
采用激光粒度仪测定PMB-MVLs的粒径,测得平均粒径为(5.84±1.42)μm,粒度分布较均匀。Zeta电位为(-26.77±0.55)mV,Zeta电位的绝对值大于25 mV,说明PMB-MVLs的结构具有良好的动力学稳定性。见图4
按照最优处方和制备工艺平行制备3批PMB-MVLs混悬液,按“2.2.7”项下方法测定包封率,测得PMB-MVLs纯化后包封率为(69.52±1.53)%,RSD为2.20%,表明按该处方制备的PMB-MVLs混悬液可获得高的包封率且重现性好。
将PMB-MVLs混悬液分别于4和25 ℃条件下放置30 d,分别在0、10、20、30 d取样,观察其外观变化,并测定其粒径和包封率,具体考察结果见表4。结果显示,4 ℃放置1个月后脂质体沉淀,轻摇后呈白色半透明均匀状混悬液,包封率和粒径变化不大,表明PMB-MVLs混悬液在4 ℃下储存1个月稳定性良好。25 ℃放置1个月后脂质体沉淀较多,出现团状聚集,且轻摇不易消失,包封率下降约10%,粒径增大约50%,表明PMB-MVLs混悬液不宜在室温条件下储存。
通过透析法[16-17]研究PMB-MVLs混悬液及PMB原料药的体外释放行为。精密量取PMB-MVLs混悬液和PMB溶液(与PMB-MVLs混悬液药物质量浓度等量)各5 mL添加到经预处理过的透析袋(截留相对分子质量Mw=14 000)内,置于盛有30 mL磷酸盐缓冲液(PBS,pH 7.4)释放介质中,于37 ℃下100 r·min-1持续搅拌,分别在0.5、1、2、4、8、12、24、48、72、96 h时取样1.0 mL,并补加等体积的新鲜释放介质(平行操作3份)。分别测定各时间点释放出PMB的含量,以零时刻包封药量为100%药量,计算累积释放度,绘制释放曲线图,并利用拟合方程对PMB-MVLs混悬液和PMB溶液在pH 7.4条件下释药行为进行模型拟合分析。
结果见图5,PMB溶液在PBS(pH 7.4)释放介质中于8 h时基本释放完全。PMB-MVLs混悬液在PBS中于2、12、24、72 h分别释放约15%、55%、65%、82%,在72 h时基本释放完全,且无突释效应,表明其具有缓释作用。累积释药曲线方程拟合结果见表5,PMB-MVLs混悬液和PMB原料药在pH 7.4释放介质中符合一级释放动力学模型。
配制LB、TSB液体培养基和固体培养基,对其进行120 ℃高压蒸汽灭菌后于4 ℃条件下储存。用无菌生理盐水将大肠杆菌(E.coli)和铜绿假单胞菌(P.aeruginosa)菌液稀释至1×106和4×106 CFU·mL-1。其中,LB作为E.coli的培养基,TSB作为P.aeruginosa的培养基。
采用微量稀释法[18-19]测定最低抑菌浓度(minimum inhibitory concentration, MIC)。分别向96孔板中加入100 μL上述稀释后的菌液,再将PMB溶液和PMB-MVLs分别用已经灭菌的LB和TSB溶液倍比稀释后取100 μL分别加入各孔中。设置阴性对照孔(仅加培养基和菌液)和空白对照孔(加培养基、菌液和对应浓度的空白MVLs),将96孔板置于37 ℃恒温箱中孵育24 h。在黑色背景下先观察有细菌生长孔为混浊,眼观无细菌生长孔所含药物浓度即为该药物的MIC。为了进一步确定最低杀菌浓度(minimum bactericidal concentration, MBC),分别吸取上述96孔板中未见细菌生长孔的培养物100 μL,移种至不含药的固体LB和TSB培养基上,37 ℃倒置培养24 h,观察有无细菌生长,用活菌计数法检测平皿上的菌落,平均数小于5个菌落的最小稀释度的药物浓度即为该药的MBC。
图6~7可知,PMB原料药组和PMB-MVLs制剂组对E.coil的MIC为4 μg·mL-1,MBC为8 μg·mL-1;对P.aeruginosa的MIC为8 μg·mL-1,MBC为32 μg·mL-1
采用微量稀释法测定各组细菌生长抑制率。本研究以加入培养基作为阴性对照组,空白MVLs作为空白对照组,给药剂量和菌液浓度同“2.5.1”项下,将96孔板于37 ℃下孵育24 h后,使用酶标仪测定600 nm下的光密度值(OD600 nm),按照公式2计算细菌生长抑制率。
细菌生长抑制率(%)= O D N - O D D O D N
其中,ODN为阴性对照组OD600 nm光密度值,ODD是添加药物组OD600 nm光密度值。
图8可知,在一定浓度范围内,PMB原料药组和PMB-MVLs制剂组的细菌生长抑制率随药物浓度增加而增大,表明两者抑菌作用均具有一定的浓度依赖性,且在低浓度时,PMB-MVLs制剂组表现出更好的抑菌效果。
为进一步研究PMB和PMB-MVLs对两种细菌生长抑制作用随时间变化情况,本研究分别设置7个浓度梯度,给药剂量和菌液浓度同“2.5.1”项下。分别于0、1、2、4、8、12、24 h使用酶标仪检测各孔OD600值,计算细菌生长抑制率,以细菌生长抑制率-时间作图。
图9可以看出,PMB原料药组各浓度溶液对E.coli的抑制情况在给药4 h后抑制率变化不明显,而PMB-MVLs制剂组在24 h内抑制率均呈逐渐上升趋势。由图9可知,随着时间延长,PMB原料药组对P.aeruginosa生长抑制率逐渐趋于平稳,于给药后8 h变化不大,而PMB-MVLs组在给药后8 h抑制率呈逐渐上升趋势。
采用体外红细胞溶血实验考察多囊脂质体辅料安全性。取一定量的PMB-MVLs混悬液。按表6配比量依次加入2%红细胞混悬液、纯化水、生理盐水和PMB-MVLs于7支试管中,摇匀后置37 ℃恒温水浴中连续观察3 h,随后,将各试管中样品离心(2 500 r·min-1,6 min)后取上清液,采用紫外—可见分光光度计,在541 nm波长下测定各管样品的光密度,以添加纯化水为阳性对照组,生理盐水为阴性对照组,平行测定3次,根据公式3计算红细胞溶血率。
红细胞溶血率(%)= O D - O D O D - O D ×100%
其中,OD药物组、OD阴性对照组和OD阳性对照组分别添加各浓度PMB-MVLs药液组、阴性对照组和阳性对照组在541 nm波长下测得光密度值。
表6图10可知:各试管置于37 ℃恒温孵育3 h后,PMB-MVLs组和生理盐水组上层液体透明澄清,均无溶血及红细胞凝聚现象,而第7管阳性对照管内液体红色澄明,管底无红细胞残留,表明全部溶血。红细胞溶血率数据结果表明,当PMB-MVLs脂质体粒子质量浓度在20~40 μg·mL-1时,其红细胞溶血率为0.92%~0.25%,小于2%,该结果与肉眼观察结果一致,表明PMB-MVLs在3 h内不发生溶血或凝聚,因此,PMB-MVLs可以注射使用。
采用GraphPad Prism 9.0.0软件进行统计学分析。所有数据结果以均以平均值±标准差( x -±s)表示,经t-检验或采用单因素方差分析,对所得数据进行统计学分析。其中,P<0.05时,判定为有显著统计学差异,P<0.01时,为有极显著性差异。
抗生素耐药已成为全球面临的严重公共卫生挑战之一,多黏菌素B由于保留了对多重耐药性革兰阴性菌的抗菌活性,使其作为治疗革兰阴性菌的最后一道防线而再次被重视[20-22]。本研究以模型药物PMB为研究对象,以MVLs作为载体材料,成功构建了一种PMB-MVLs新型给药系统。与普通脂质体相比,多囊脂质体生物相容性好[23],稳定性高,能够在给药部位形成药物贮库,延长药物的释放时间[24-25]
本研究采用复乳法制备PMB-MVLs,在参阅文献[13-15]的基础上,通过预实验和单因素筛选及Box-Behnken效应面法,对影响PMB-MVLs制备过程中重要的处方工艺因素进行优化,大大提高了 PMB-MVLs的包封率。PMB属于水溶性药物,普通脂质体对水溶性药物的包封率偏低[26]。Kong等[27]采用薄膜分散法和逆相蒸发法制备的硫酸多黏菌素E普通脂质体包封率仅为34.12%和51.76%。而MVLs具有较大的水相包封容积,适合包封水溶性药物。本实验将PMB包封于MVLs中,将平均包封率提高至69.52%,解决了PMB包封率偏低的问题,同时也为提高其他水溶性药物的包封率奠定了基础。
本实验通过体外释放实验验证,PMB-MVLs体外持续释放达72 h,无突释现象,具有良好的缓释效应。作为一种良好的缓释制剂,除了具有良好的缓释性能外,稳定性亦非常重要。本实验将以最佳处方和工艺制备的PMB-MVLs放置在4 ℃冰箱中保存1个月,稳定性良好。但由于其平均粒径为5.84 μm,粒径较大,制备和存储过程中容易发生自发聚集和沉降,在一定程度上影响了脂质体的稳定性[28],因此,可采用真空冷冻干燥技术,将其制成PMB-MVLs冻干粉末,以进一步提高其稳定性。
本研究以24 h细菌生长抑制率为指标考察PMB-MVLs的体外抗菌活性,对比PMB原料药和PMB-MVLs制剂对E.coliP.aeruginosa生长的抑制作用,结果发现低浓度时PMB-MVLs具有更好的抗菌效果,但并没有显著的提高;通过考察相同药物剂量下,不同时间点的PMB原料药和PMB-MVLs的细菌生长抑制率发现,PMB原料药组的细菌生长抑制率随时间延长趋于平稳,而PMB-MVLs制剂组随时间延长抑制率逐渐增加,PMB-MVLs在24 h达到与PMB原料药相同的抗菌效果。结合释放特性分析,PMB-MVLs在24 h的累积释放率约为65%,并未达到完全释放,说明PMB-MVLs具有更好的抗菌活性。通过红细胞溶血性实验对PMB-MVLs制剂的安全性进行初步考察,结果表明在其抗菌活性范围内无溶血风险。
综上所述,本研究成功制备了具有缓释作用的PMB-MVLs,与PMB原料药相比,PMB-MVLs明显延长了药物的作用时间,增强了抗菌活性。因此,多囊脂质体作为抗生素的缓释给药体系值得进一步研究,对于减少给药次数、降低毒性、提高患者依从性具有潜在的应用前景。
  • 国家药典委员会药品标准制修订研究课题资助(2023Y002)
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2025年第60卷第6期
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doi: 10.11669/cpj.2025.06.008
  • 接收时间:2024-01-19
  • 首发时间:2025-11-07
  • 出版时间:2025-03-22
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  • 收稿日期:2024-01-19
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国家药典委员会药品标准制修订研究课题资助(2023Y002)
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    浙江工业大学绿色制药协同创新中心, 杭州 310014

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*陈雪帆,男,硕士,高级工程师 研究方向:化学药、中药及原辅包质量 Tel:13819183280
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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