Journal
PHARMACEUTICAL RESEARCH
Volume 23, Issue 2, Pages 367-377Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11095-005-9225-1
Keywords
capsid; corrole; metal; penton base; targeting
Funding
- NCI NIH HHS [R01 CA102126, CA102126] Funding Source: Medline
Ask authors/readers for more resources
Corroles are amphiphilic macrocycles that can bind and transport metal ions, and thus may be toxic to cells. We predicted that anionic corroles would poorly enter cells due to the negatively charged cell membrane, but could be ideal tumor-targeted drugs if appropriate carriers enabled delivery into tumor cells. In this work, we test the hypothesis that recombinant cell penetrating proteins of the adenovirus (Ad) capsid form noncovalent conjugates with corroles to facilitate target-specific delivery and cell death. Corroles mixed with recombinant proteins were tested for conjugate assembly, cell penetration, stability, targeted binding, and cell killing in vitro. Sulfonated corroles entered cells only with carrier proteins, and formed stable complexes with recombinant Ad capsid proteins. ErbB receptor-targeted conjugates were cytotoxic to ErbB2-positive but not ErbB2-negative breast cancer cells, whereas molar equivalents of free corrole had no effect on these cells. Sulfonated corroles are cytotoxic to ErbB2-positive breast cancer cells when delivered by a targeted cell penetrating protein. The relatively low dose required to accomplish this compared to untargeted compounds suggests that corroles may lend themselves to targeted therapy. Importantly, the amphiphilicity of corroles enables a unique approach to bioconjugate formation whereby the carrier and drug form a stable complex by noncovalent assembly.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available