Related Experiment Video

Updated: May 22, 2026

Detection of Functional Matrix Metalloproteinases by Zymography
09:30

Detection of Functional Matrix Metalloproteinases by Zymography

Published on: November 8, 2010

Calpain inhibitors exhibit matrix metalloproteinase-2 inhibitory activity

Mohammad A M Ali1, Alesandra Stepanko, Xiaohu Fan

  • 1Department of Pharmacology, University of Alberta, Edmonton, AB, Canada T6G 2S2.

Biochemical and Biophysical Research Communications
|May 12, 2012
PubMed

Insights

Certain calpain inhibitors, specifically PD-150606 and ALLN, demonstrate significant matrix metalloproteinase (MMP)-2 inhibitory activity. This finding suggests that MMP-2 inhibition contributes to the cardioprotective effects observed with these calpain inhibitors.

Area of Science:

  • Cardiovascular Research
  • Enzymology
  • Pharmacology

Background:

  • Matrix metalloproteinase (MMP)-2 is implicated in oxidative stress-induced cardiac injury.
  • MMP-2 targets intracellular sarcomeric proteins, contributing to myocardial damage.
  • Calpain inhibitors have shown promise in improving cardiac function after ischemia-reperfusion injury.

Purpose of the Study:

  • To investigate whether calpain inhibitors possess inhibitory activity against MMP-2.
  • To determine if MMP-2 inhibition contributes to the cardioprotective effects of calpain inhibitors.

Main Methods:

  • Tested four calpain inhibitors (calpain inhibitor III, ALLM, ALLN, PD-150606) for MMP-2 inhibition.
  • Assessed MMP-2 gelatinolytic activity and troponin I proteolysis.
  • Determined IC(50) values using a fluorogenic MMP substrate assay.

Main Results:

  • ALLN and PD-150606 significantly inhibited MMP-2 gelatinolytic and proteolytic activity.
  • PD-150606 and ALLN demonstrated potent MMP-2 inhibition, with lower IC(50) values compared to calpain inhibitor III.
  • ALLM showed minimal MMP-2 inhibitory activity.

Conclusions:

  • Calpain inhibitors PD-150606 and ALLN possess significant MMP-2 inhibitory activity.
  • This dual activity suggests that MMP-2 inhibition is a contributing mechanism for the cardioprotective effects of these compounds.
  • Findings highlight potential therapeutic strategies targeting both calpains and MMP-2 in cardiac injury.

More Related Videos

Measuring Global Cellular Matrix Metalloproteinase and Metabolic Activity in 3D Hydrogels07:39

Measuring Global Cellular Matrix Metalloproteinase and Metabolic Activity in 3D Hydrogels

Published on: January 22, 2019

Related Concept Videos

Role of Matrix Metalloproteases in Degradation of ECM01:23

Role of Matrix Metalloproteases in Degradation of ECM

Matrix metalloproteases (MMPs) are enzymes involved in the hydrolysis of proteins and glycoproteins of the extracellular matrix. MMPs are essential for the migration and proliferation of cells through the dense matrix network, throughout embryonic development, and throughout morphogenesis. The first MMP activity discovered was a collagenase in a tadpole's tail undergoing metamorphosis. The active collagen deposition and modifications lead to the morphogenesis of tadpoles into the adult body.
A...
Caspases01:24

Caspases

Caspase, a family of cysteine proteases, serve as effectors in apoptosis. The ced3 gene in C.elegans was first identified to be involved in apoptosis. This gene encodes the ced-3 caspase that is similar to the interleukin-1-beta converting enzyme or ICE in mammals. In addition to apoptosis, caspases also function in the inflammatory response. Inflammatory caspases are essential in activating pro-inflammatory cytokines that recruit immune cells and block the replication of pathogens inside cells.
Calmodulin-dependent Signaling01:16

Calmodulin-dependent Signaling

Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors01:30

Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors

Angiotensin-converting enzyme (ACE), a vital component of the renin-angiotensin-aldosterone system, is abundant in lung endothelial cells. ACE converts the inactive decapeptide, angiotensin I, into the active octapeptide, angiotensin II. This potent vasoconstrictor narrows blood vessels, increasing resistance to blood flow and elevating blood pressure. Angiotensin II also stimulates aldosterone production, encouraging kidney cells to reabsorb more sodium and water from urine, thereby increasing...
Spasmolytic Agents: Chemical Classification01:29

Spasmolytic Agents: Chemical Classification

Spasmolytic agents are drugs used to alleviate muscle spasms and spasticity. They can be categorized into different chemical groups based on their mechanisms of action. Centrally acting spasmolytics primarily affect the spinal cord, while others directly target skeletal muscle cells.
A major class of centrally acting spasmolytics is the α2-agonist, such as tizanidine. These drugs bind to α2-adrenoceptors, inhibiting the release of the excitatory neurotransmitter glutamate. They also promote...
Indirect-Acting Cholinergic Agonists: Mechanism of Action01:18

Indirect-Acting Cholinergic Agonists: Mechanism of Action

Indirect-acting cholinergic agonists work by interacting with an enzyme called acetylcholinesterase (AChE) in the synaptic cleft. They can be reversible or irreversible inhibitors and have different effects on the enzyme.
Reversible inhibitors like edrophonium bind to a specific part of the enzyme called the anionic catalytic site. They form noncovalent bonds, which means they are not strongly attached to the enzyme. This creates a temporary and less stable enzyme–inhibitor complex, leading to...