Related Experiment Video

Updated: Jul 3, 2026

Screening for Thermotoga maritima Membrane-Bound Pyrophosphatase Inhibitors
09:11

Screening for Thermotoga maritima Membrane-Bound Pyrophosphatase Inhibitors

Published on: November 23, 2019

Inhibition of mite protease (Df-protease) with protease inhibitors

A Matsushima1, Y Kodera, S Ozawa

  • 1Department of Materials Science, Toin University, Yokohama, Japan.

Biochemistry International
|December 1, 1992
PubMed

Insights

House dust mite protease activates the kallikrein-kinin system. Inhibitors like aprotinin effectively blocked this mite-protease activity, preventing kinin formation and reducing blood permeability in vivo.

Area of Science:

  • Biochemistry
  • Immunology
  • Allergology

Background:

  • House dust mites (Dermatophagoides farinae) possess proteases that can activate biological pathways.
  • The kallikrein-kinin system plays a role in inflammatory responses, including changes in blood permeability.

Purpose of the Study:

  • To investigate the inhibitory effects of specific protease inhibitors on a house dust mite-derived protease.
  • To determine the efficacy of these inhibitors in preventing mite-induced kinin formation and blood permeability enhancement.

Main Methods:

  • In vitro kinetic studies to determine inhibition constants (Ki) for various protease inhibitors.
  • In vivo experiments in guinea pigs to assess the suppression of protease-induced blood permeability.

Main Results:

  • The mite protease specifically activates blood coagulation factor XIIa, leading to kallikrein-kinin system activation.
  • Aprotinin, soybean trypsin inhibitor (Kunitz), and gabexate mesylate demonstrated potent inhibition of the mite protease with low Ki values.
  • These inhibitors significantly suppressed the enhancement of blood permeability in guinea pigs caused by the mite protease.

Conclusions:

  • Protease inhibitors can effectively block the activity of house dust mite proteases.
  • Inhibition of mite-induced protease activity prevents kinin formation and associated increases in blood permeability.
  • These findings suggest potential therapeutic strategies for managing house dust mite allergies.

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

Separation and Fractionation of Cell Wall and Cell Membrane Proteins from Mycobacterium tuberculosis for Downstream Protein Analysis06:14

Separation and Fractionation of Cell Wall and Cell Membrane Proteins from Mycobacterium tuberculosis for Downstream Protein Analysis

Published on: September 26, 2025

Related Concept Videos

Enzyme Inhibition01:30

Enzyme Inhibition

Inhibitors are molecules that reduce enzyme activity by binding to the enzyme. In a normally functioning cell, enzymes are regulated by a variety of inhibitors. Drugs and other toxins can also inhibit enzymes. Some inhibitors bind to the enzyme’s active site, while others inhibit enzymatic activity by binding to other sites on the protein structure.
Inhibitors of Bacterial Protein Synthesis01:25

Inhibitors of Bacterial Protein Synthesis

Aminoglycosides constitute a highly potent class of bactericidal antibiotics that exert their antimicrobial effects by targeting the bacterial ribosome, specifically disrupting protein synthesis. These polycationic molecules consist of amino-modified sugars linked via glycosidic bonds to an aminocyclitol core such as 2-deoxystreptamine or streptamine. Their strong positive charges facilitate tight binding to the negatively charged phosphate backbone of ribosomal RNA (rRNA), primarily at the 16S...
Anthelminthic Agents01:15

Anthelminthic Agents

Anthelmintic drugs differ significantly from antiparasitic therapies targeting protozoa, primarily due to differences in parasite biology. Whereas most protozoal treatments act on proliferating cells, anthelmintics are typically directed against mature, nonproliferative helminths. The therapeutic approach considers the helminth's reliance on neuromuscular coordination, glucose metabolism, and microtubular integrity for survival, reproduction, and localization within the host. Most anthelmintics...
Inhibitors of Virion Maturation and Assembly01:19

Inhibitors of Virion Maturation and Assembly

As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...