Related Experiment Video
Updated: May 3, 2026

Ex Vivo Treatment Response of Primary Tumors and/or Associated Metastases for Preclinical and Clinical Development of Therapeutics
Published on: October 2, 2014
Long-circulating enzyme-activated HSP90-targeted camptothecin derivatives
Mengyuan Ding1, Qianqian Shen2, Yi Su2
1Innovation Center for AI and Drug Discovery, School of Pharmacy, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, PR China; Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, PR China; State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
Researchers developed novel albumin-binding prodrugs for enhanced camptothecin delivery. These drug delivery systems improve tumor targeting and anti-cancer efficacy while reducing side effects, offering a promising approach for cancer therapy.
Area of Science:
- Oncology
- Drug Delivery
- Biochemistry
Background:
- Camptothecins are potent anti-cancer agents with limitations in delivery and toxicity.
- Enzyme-activated drug release systems can improve therapeutic outcomes.
- Enhancing drug circulation time and tumor selectivity is crucial for effective cancer treatment.
Purpose of the Study:
- To design and evaluate novel enzyme-activated, albumin-binding prodrugs of a camptothecin derivative (AZ'0132).
- To investigate the tumor-targeting capabilities and anti-tumor efficacy of these new drug delivery systems.
- To assess the impact of albumin binding on the pharmacokinetic properties and toxicity profile of the camptothecin prodrugs.
Main Methods:
- Construction of an enzyme-activated prodrug (HC07) using a valine-alanine linker and AZ'0132, targeting eHSP90.
- Development of albumin-binding prodrugs (HC08 and HC09) by conjugating HC07 to albumin.
- In vivo evaluation of prodrugs for circulation time, tumor selectivity, and anti-tumor efficacy.
Main Results:
- HC07 demonstrated targeted delivery to tumors via eHSP90, with specific cleavage enhancing the therapeutic window and reducing ocular toxicity.
- Albumin-binding prodrugs HC08 and HC09 exhibited prolonged in vivo circulation times.
- HC08 and HC09 showed significantly improved tumor selectivity and enhanced anti-tumor efficacy compared to non-binding counterparts.
Conclusions:
- The developed eHSP90-based, albumin-binding prodrugs represent a promising long-circulating drug delivery system for camptothecins.
- This strategy offers a novel approach to enhance anti-cancer drug efficacy and reduce systemic toxicity.
- The findings provide new avenues for designing advanced drug delivery systems for future anti-cancer therapies.
More Related Videos
07:47Custom-designed Laser-based Heating Apparatus for Triggered Release of Cisplatin from Thermosensitive Liposomes with Magnetic Resonance Image Guidance
Published on: December 13, 2015
06:00Through the Looking Glass: Time-lapse Microscopy and Longitudinal Tracking of Single Cells to Study Anti-cancer Therapeutics
Published on: May 14, 2016
Related Concept Videos
Translocation of Proteins into the Mitochondria
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
Energy to Drive Translocation
Generally, polypeptides are unfolded by two distinct...
Protein Transport to the Stroma
Protein complexes called the translocon of the outer chloroplast membrane or TOC complex, and the translocon of the inner chloroplast membrane or TIC complex mediate the...
The Unfolded Protein Response
ATP Driven Pumps II: P-type Pumps
A typical P-type pump has three cytosolic domains: nucleotide-binding (N), phosphorylation (P), and activator (A) domains. These domains are connected to the membrane-spanning helices by short amino acid segments. ATP hydrolysis and covalent phosphoenzyme intermediate formation are crucial parts of the catalytic cycle. At the highly...
Export of Misfolded Proteins out of the ER