Cathepsin B degradable star-shaped peptidic macromolecules for delivery of 2-methoxyestradiol.

Abstract:

:2-Methoxyestradiol (2ME), a natural metabolite of estradiol, has antiproliferative and antiangiogenic activity. However, its clinical success is limited due to poor water solubility and poor pharmacokinetic parameters suggesting the need for a delivery vehicle. In this study we evaluated cathepsin B degradable star-shaped peptidic macromolecules (SPMs) that can potentially be used to create higher generation and high molecular weight peptidic polymer as delivery vehicle of 2ME. Two peptidic macromolecules having positively charged amine (ASPM) or negatively charged carboxyl surface groups (CSPM) were synthesized and evaluated for their degradation in the presence of cathepsin B and stability in the presence of neutral or acidic buffer and serum. Both ASPM and CSPM degraded rapidly in the presence of cathepsin B. Both were stable in neutral and acidic buffer whereas only CSPM exhibited substantial stability in the presence of serum. Both macromolecules were nontoxic toward breast cancer cells whereas 2ME-containing macromolecules exhibited antiproliferative activity in the micromolar range. Overall, results from the current study indicate that tetrapeptide GFLG can be used to create star-shaped macromolecules that are degraded in the presence of cathepsin B and have the potential to be developed as delivery vehicles of 2ME.

journal_name

Mol Pharm

journal_title

Molecular pharmaceutics

authors

Shankar R,Samykutty A,Riggin C,Kannan S,Wenzel U,Kolhatkar R

doi

10.1021/mp400261h

subject

Has Abstract

pub_date

2013-10-07 00:00:00

pages

3776-88

issue

10

eissn

1543-8384

issn

1543-8392

journal_volume

10

pub_type

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