Tags

Type your tag names separated by a space and hit enter

Folate-decorated and reduction-sensitive micelles assembled from amphiphilic polymer-camptothecin conjugates for intracellular drug delivery.
Mol Pharm. 2014 Nov 03; 11(11):4258-69.MP

Abstract

It is one of the challenges for a wide clinical application of polymer micelles to address the structure disintegration and premature drug release before reaching a pathological site. In the current study, folic acid (FA)-decorated polymer-drug conjugates (FSC) were synthesized with disulfide linkages between camptothecin (CPT) and amphiphilic poly(ethylene glycol)-b-poly(ε-caprolactone) (PECL) copolymers. FSC conjugates were proposed to assemble into micelles with a hydrophobic core of PCL segments and CPT and a hydrophilic corona of PEG segments. The addition of hexadecanol during micelle formation (FSC-16) was proposed to modulate the interactions of hydrophobic segments in micelles and enhance the reductive sensitivity. FSC-16 micelles were obtained with critical micelle concentration of around 2 μg/mL and an average size of around 200 nm, and the conjugated CPT was rapidly released out in response to glutathione. The reductive sensitivity was also demonstrated with respect to the changes of micelle size and morphologies as well as the fluorescent intensity of pyrene loaded in micelles. Benefiting from the FA receptor-mediated uptake and the reduction-sensitive release of CPT, significant cytotoxicity and cell apoptosis were identified for FSC-16 micelles against SKOV-3 cells with strong expressions of FA receptors. Flow cytometry and confocal laser scanning microscopy analyses demonstrated that CPT was distributed into nuclei after cellular uptake and intracellular release from FSC-16 micelles. Thus, the FA-decorated and reduction-sensitive micelles assembled from polymer-drug conjugates show advantages in inhibiting premature release during circulation, enhancing cellular uptake at the tumor tissues, and promoting intracellular release and nuclei location of the active moieties.

Authors+Show Affiliations

Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, School of Materials Science and Engineering, Southwest Jiaotong University , Chengdu 610031, P. R. China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25238329

Citation

Liu, Chaoyu, et al. "Folate-decorated and Reduction-sensitive Micelles Assembled From Amphiphilic Polymer-camptothecin Conjugates for Intracellular Drug Delivery." Molecular Pharmaceutics, vol. 11, no. 11, 2014, pp. 4258-69.
Liu C, Yuan J, Luo X, et al. Folate-decorated and reduction-sensitive micelles assembled from amphiphilic polymer-camptothecin conjugates for intracellular drug delivery. Mol Pharm. 2014;11(11):4258-69.
Liu, C., Yuan, J., Luo, X., Chen, M., Chen, Z., Zhao, Y., & Li, X. (2014). Folate-decorated and reduction-sensitive micelles assembled from amphiphilic polymer-camptothecin conjugates for intracellular drug delivery. Molecular Pharmaceutics, 11(11), 4258-69. https://doi.org/10.1021/mp500468d
Liu C, et al. Folate-decorated and Reduction-sensitive Micelles Assembled From Amphiphilic Polymer-camptothecin Conjugates for Intracellular Drug Delivery. Mol Pharm. 2014 Nov 3;11(11):4258-69. PubMed PMID: 25238329.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Folate-decorated and reduction-sensitive micelles assembled from amphiphilic polymer-camptothecin conjugates for intracellular drug delivery. AU - Liu,Chaoyu, AU - Yuan,Jiang, AU - Luo,Xiaoming, AU - Chen,Maohua, AU - Chen,Zhoujiang, AU - Zhao,Yuancong, AU - Li,Xiaohong, Y1 - 2014/10/03/ PY - 2014/9/20/entrez PY - 2014/9/23/pubmed PY - 2015/7/15/medline KW - disulfide linkage KW - folic acid decoration KW - nucleus localization KW - polymer−drug conjugate micelle KW - reductive sensitivity SP - 4258 EP - 69 JF - Molecular pharmaceutics JO - Mol Pharm VL - 11 IS - 11 N2 - It is one of the challenges for a wide clinical application of polymer micelles to address the structure disintegration and premature drug release before reaching a pathological site. In the current study, folic acid (FA)-decorated polymer-drug conjugates (FSC) were synthesized with disulfide linkages between camptothecin (CPT) and amphiphilic poly(ethylene glycol)-b-poly(ε-caprolactone) (PECL) copolymers. FSC conjugates were proposed to assemble into micelles with a hydrophobic core of PCL segments and CPT and a hydrophilic corona of PEG segments. The addition of hexadecanol during micelle formation (FSC-16) was proposed to modulate the interactions of hydrophobic segments in micelles and enhance the reductive sensitivity. FSC-16 micelles were obtained with critical micelle concentration of around 2 μg/mL and an average size of around 200 nm, and the conjugated CPT was rapidly released out in response to glutathione. The reductive sensitivity was also demonstrated with respect to the changes of micelle size and morphologies as well as the fluorescent intensity of pyrene loaded in micelles. Benefiting from the FA receptor-mediated uptake and the reduction-sensitive release of CPT, significant cytotoxicity and cell apoptosis were identified for FSC-16 micelles against SKOV-3 cells with strong expressions of FA receptors. Flow cytometry and confocal laser scanning microscopy analyses demonstrated that CPT was distributed into nuclei after cellular uptake and intracellular release from FSC-16 micelles. Thus, the FA-decorated and reduction-sensitive micelles assembled from polymer-drug conjugates show advantages in inhibiting premature release during circulation, enhancing cellular uptake at the tumor tissues, and promoting intracellular release and nuclei location of the active moieties. SN - 1543-8392 UR - https://www.unboundmedicine.com/medline/citation/25238329/Folate_decorated_and_reduction_sensitive_micelles_assembled_from_amphiphilic_polymer_camptothecin_conjugates_for_intracellular_drug_delivery_ L2 - https://doi.org/10.1021/mp500468d DB - PRIME DP - Unbound Medicine ER -