Related Experiment Video

Updated: Dec 2, 2025

Quantitative Structure-Activity Relationship, Activity Prediction, and Molecular Dynamics of Non-nucleotide Reverse Transcriptase Inhibitors
10:29

Quantitative Structure-Activity Relationship, Activity Prediction, and Molecular Dynamics of Non-nucleotide Reverse Transcriptase Inhibitors

Published on: May 9, 2025

1.9K

Molecular dynamic simulation (MDS) and in vitro cathepsin-B inhibitory activity of decrusin angelate, ibuprofen, and

Chanchal Sharma1, Sun Chul Kang1

  • 1Department of Biotechnology, College of Engineering, Daegu University, Gyeongsan, Republic of Korea.

Natural Product Research
|November 5, 2020
PubMed

Insights

Decursinol angelate (DA) effectively inhibits cathepsin B (CATB), a key enzyme in cancer metastasis. This natural flavonoid shows potent activity and no toxicity, making it a promising therapeutic candidate.

Area of Science:

  • Biochemistry
  • Pharmacology
  • Oncology

Background:

  • Cathepsin B (CATB) proteolytic activity is a therapeutic target for inhibiting cancer metastasis.
  • Natural compounds and synthetic drugs are explored for their potential to inhibit CATB.

Purpose of the Study:

  • To determine the specificity and efficacy of decursinol angelate (DA), thymol (TH), and ibuprofen (IB) in inhibiting CATB.
  • To identify the best candidate for CATB inhibition among the tested compounds.

Main Methods:

  • Enzymatic assays using Z-Phe-Arg-4MβNA (BANA) substrate.
  • Computational docking analysis with CATB (PDB Id: 1HUC).
  • In vitro studies using human colorectal carcinoma (HCT 116) cells and normal colon cells (CCD 841).

Main Results:

  • Decursinol angelate (DA) demonstrated the lowest IC50 for CATB inhibition.
  • Docking analysis revealed favorable interactions between DA and CATB catalytic site residues.
  • DA rapidly inactivated CATB in HCT 116 cells with no observed toxicity to normal colon cells.

Conclusions:

  • Decursinol angelate is a potent inhibitor of cathepsin B.
  • DA's interaction with CATB's catalytic site explains its inhibitory activity.
  • DA presents a promising, non-toxic therapeutic agent for targeting cancer metastasis.
Keywords:
Cathepsin Bcolon cancerdecursinol angelateenzymatic assaymolecular dockingmolecular dynamics

More Related Videos

Assessing the Putative Anticryptococcal Properties of Crude and Clarified Extracts from Mollusks09:18

Assessing the Putative Anticryptococcal Properties of Crude and Clarified Extracts from Mollusks

Published on: December 2, 2022

1.3K
In Vitro Cleavage Assays using Purified Recombinant Drosophila Caspases for Substrate Screening08:16

In Vitro Cleavage Assays using Purified Recombinant Drosophila Caspases for Substrate Screening

Published on: October 6, 2022

1.8K

Related Concept Videos

In Vitro Drug Dissolution: Alternative Methods01:17

In Vitro Drug Dissolution: Alternative Methods

Alternative drug dissolution methods include the rotating bottle, intrinsic dissolution test, peristalsis, and the Franz diffusion cell method. The rotating bottle method involves meticulously rotating tightly capped controlled-release beads in a temperature-controlled bath. Periodic decanting of samples allows for residue assay, followed by refilling with fresh medium and testing at various pH levels to emulate the gastrointestinal tract conditions.In contrast, the intrinsic dissolution test...
111
In Vitro Drug Dissolution: Compendial Testing Models II01:09

In Vitro Drug Dissolution: Compendial Testing Models II

Various dissolution methods are utilized to assess a drug’s dissolution rate, including the flow-through cell, paddle-over-disk, cylinder, and reciprocating disk methods.The flow-through cell apparatus (USP (United States Pharmacopeia) method 4) comprises a reservoir for the dissolution medium and a pump that propels the medium through the cell containing the test sample. This method is crucial for assessing modified-release dosage forms with minimally soluble active ingredients,...
100
In Vitro Drug Dissolution: Compendial Testing Models I01:13

In Vitro Drug Dissolution: Compendial Testing Models I

Compendial dissolution methods are standardized procedures defined by pharmacopeias to evaluate the rate at which a drug dissolves in a specific medium. These methods ensure batch-to-batch consistency, enable quality control, and support the prediction of drug bioavailability. They are critical for both immediate and modified-release drug products.The apparatuses used for dissolution testing differ in their design and mechanical function, but all aim to simulate the physiological environment of...
113