ArticleVirulence2018
Secreted Giardia intestinalis cysteine proteases disrupt intestinal epithelial cell junctional complexes and degrade chemokines.
Article in Virulence, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 56 papers.
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Who cites it
56 citing papers in PubMed, 92 citations in OpenAlex.
- Pathogenicity and virulence ofVirulence · 2026Review
- Host-microbiome interactions and enteric pathogen infections-from early-life to long-term impacts on gut-brain communication.Journal of applied microbiology · 2026Review
- GlRac regulates an ATG8-independent autophagy-like pathway in Giardia lamblia.PLoS pathogens · 2026Article
- Trichinella spiralis galectin disrupts gut epithelial integrity and mediates larval invasion via acting MUC13- ROCK2/MAPK pathway.PLoS neglected tropical diseases · 2026Article
- Natural history and impact of Giardia lamblia on child growth attainment and associated pathway-specific biomarkers in a Nicaraguan birth cohort.PLoS neglected tropical diseases · 2026Article
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- Enteric Infections, Dysbiosis, and Metabolic Dysfunction: The Role of Diarrheagenic Pathogens in Insulin Resistance.International journal of molecular sciences · 2026Review
- Iron Regulatory Mechanism IRE/IRP-like in Two Protozoa of Importance to Human Health,Pathogens (Basel, Switzerland) · 2026Review
- Immunoinformatic analysis for identifying immunogenic antigens from the complete proteome of Giardia lamblia.Memorias do Instituto Oswaldo Cruz · 2026Article
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- Aspartic protease 2 from Trichinella spiralis excretion/secretion products hydrolyzes tight junctions of intestinal epithelial cells.PLoS neglected tropical diseases · 2025Article
- Natural history and impact ofmedRxiv : the preprint server for health sciences · 2025Article
- Selected Protective Mechanisms of Human Milk Against Intestinal Protozoal Infections in Infants.Current issues in molecular biology · 2025Review
- Article
- Convergent mechanisms of epithelial cell structure manipulation by intestinal pathogens.PLoS pathogens · 2025Review
- Giardia increases macrophage production of the anti-inflammatory cytokine interleukin-10 in response to lipopolysaccharide via macrophage galactose binding lectin.ImmunoHorizons · 2025Article
- The pathogenic responses elicited during exposure of human intestinal cell line with Giardia duodenalis excretory-secretory products and the potential attributed endocytosis mechanism.Medical microbiology and immunology · 2024Article
- Current Understanding ofCurrent tropical medicine reports · 2024Article
- A novel Trichinella spiralis serine proteinase disrupted gut epithelial barrier and mediated larval invasion through binding to RACK1 and activating MAPK/ERK1/2 pathway.PLoS neglected tropical diseases · 2024Article
- A core UPS molecular complement implicates unique endocytic compartments at the parasite-host interface inVirulence · 2023Article
Corrections and comments
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Giardiasis is a common diarrheal disease caused by the protozoan parasite Giardia intestinalis. Cysteine proteases (CPs) are acknowledged as virulence factors in Giardia but their specific role in the molecular pathogenesis of disease is not known. Herein, we aimed to characterize the three main secreted CPs (CP14019, CP16160 and CP16779), which were identified by mass spectrometry in the medium during interaction with intestinal epithelial cells (IECs) in vitro. First, the CPs were epitope-tagged and localized to the endoplasmic reticulum and cytoplasmic vesicle-like structures. Second, we showed that recombinant CPs, expressed in Pichia pastoris, are more active in acidic environment (pH 5.5-6) and we determined the kinetic parameters using fluorogenic substrates. Third, excretory-secretory proteins (ESPs) from Giardia trophozoites affect the localization of apical junctional complex (AJC) proteins and recombinant CPs cleave or re-localize the AJC proteins (claudin-1 and -4, occludin, JAM-1, β-catenin and E-cadherin) of IECs. Finally, we showed that the ESPs and recombinant CPs can degrade several chemokines, including CXCL1, CXCL2, CXCL3, IL-8, CCL2, and CCL20, which are up-regulated in IECs during Giardia-host cell interactions. This is the first study that characterizes the role of specific CPs secreted from Giardia and our results collectively indicate their roles in the disruption of the intestinal epithelial barrier and modulating immune responses during Giardia infections.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.