Advances in polymeric micelles for drug delivery and tumor targeting
✍ Scribed by Uttam Kedar; Prasanna Phutane; Supriya Shidhaye; Vilasrao Kadam
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 768 KB
- Volume
- 6
- Category
- Article
- ISSN
- 1549-9634
No coin nor oath required. For personal study only.
✦ Synopsis
A plethora of formulation techniques have been reported in the literature for targeting drugs to specific sites. Polymeric micelles (PMs) can be targeted to tumor sites by passive as well as active mechanisms. Some inherent properties of PMs, including size in the nanorange, stability in plasma, longevity in vivo, and pathological characteristics of tumor allow PMs to be targeted to the tumor site by a passive mechanism called the enhanced permeability and retention effect. PMs formed from an amphiphilic block copolymer are suitable for encapsulation of poorly water-soluble, hydrophobic anticancer drugs. Other characteristics of PMs such as separate functionality at the outer shell are useful for targeting the anticancer drug to tumor by active mechanisms. PMs can be conjugated with many ligands such as antibody fragments, epidermal growth factors, α(2)-glycoprotein, transferrin, and folate to target micelles to cancer cells. Application of heat or ultrasound are the alternative methods to enhance drug accumulation in tumoral cells. Targeting using micelles can also be directed toward tumor angiogenesis, which is a potentially promising target for anticancer drugs. PMs have been used for the delivery of many anticancer agents in preclinical and clinical studies. This review summarizes recently available information regarding targeting of anticancer drugs to the tumor site using PMs.
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## Abstract Multifunctional micelles for cancer cell targeting, distribution imaging, and anticancer drug delivery were prepared from an environmentally‐sensitive graft copolymer, poly(__N__‐isopropyl acrylamide‐__co__‐methacryl acid)‐__g__‐poly(D,L‐lactide) (P(NIPAAm‐__co__‐MAAc)‐__g__‐PLA), a dib