AI Article Synopsis

  • Researchers monitored the expression of listeriolysin O, an important virulence factor in Listeria monocytogenes, using a specific transcriptional fusion.
  • The phenolic compound arbutin was found to reduce the transcription of listeriolysin O.
  • In contrast, salicin, a similar compound, did not affect the expression of listeriolysin O.

Article Abstract

Expression of the listeriolysin O, a key virulence factor for Listeria monocytogenes, was monitored using a hlyA-luxAB transcriptional fusion. The phenolic beta-D-glucoside, arbutin, was found to repress the expression of the listeriolysin O at the level of transcription. In contrast, the structurally similar beta-glucoside salicin did not prevent expression of listeriolysin.

Download full-text PDF

Source
http://dx.doi.org/10.1111/j.1472-765x.1994.tb00958.xDOI Listing

Publication Analysis

Top Keywords

expression listeriolysin
12
listeria monocytogenes
8
phenolic beta-d-glucoside
8
beta-d-glucoside arbutin
8
repression listeriolysin
4
expression
4
listeriolysin expression
4
expression listeria
4
monocytogenes phenolic
4
arbutin expression
4

Similar Publications

LADS: a powerful vaccine platform for cancer immunotherapy and prevention.

BMC Biol

December 2024

Key Laboratory of Applied Biotechnology on Animal Science & Veterinary Medicine of Zhejiang Province, Zhejiang Engineering Research Center for Veterinary Diagnostics & Advanced Technology, Zhejiang International Science and Technology Cooperation Base for Veterinary Medicine and Health Management, Belt and Road International Joint Laboratory for One Health and Food Safety, China-Australia Joint Laboratory for Animal Health Big Data Analytics, College of Veterinary Medicine, Zhejiang A&F University, 666 Wusu Street, Lin'an District, Hangzhou, Zhejiang Province, 311300, China.

Background: The intracellular bacterium Listeria monocytogenes is an attractive vector for cancer immunotherapy as it can effectively deliver tumor antigens to antigen-presenting cells, leading to a robust antitumor response.

Results: In this study, we developed a novel vaccine platform called Listeria-based Live Attenuated Double Substitution (LADS), which involves introducing two amino acid substitutions (N478AV479A) into the virulence factor listeriolysin O (LLO). LADS is a safe vaccine platform, with an attenuation of nearly 7000-fold, while retaining complete immunogenicity due to the absence of deletion of any virulence factors.

View Article and Find Full Text PDF

The MICOS Complex Subunit Mic60 is Hijacked by Intracellular Bacteria to Manipulate Mitochondrial Dynamics and Promote Bacterial Pathogenicity.

Adv Sci (Weinh)

December 2024

Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, Zhejiang Provincial Engineering Research Center for Animal Health Diagnostics & Advanced Technology, Zhejiang International Science and Technology Cooperation Base for Veterinary Medicine and Health Management, China-Australia Joint Laboratory for Animal Health Big Data Analytics, College of Veterinary Medicine of Zhejiang A&F University, 666 Wusu Street, Lin'an District, Hangzhou, Zhejiang Province, 311300, China.

Article Synopsis
  • This study explores how Listeria monocytogenes manipulates host mitochondrial dynamics, specifically fission and fusion, to boost its pathogenicity.
  • *The virulence factor listeriolysin O (LLO) interacts with Mic60, a key component of mitochondrial structure, causing mitochondrial fragmentation that aids in bacterial infection.
  • *The research reveals Mic60's role in altering mitochondrial morphology and function during L. monocytogenes infection, suggesting new avenues for treating bacterial infections.
View Article and Find Full Text PDF

Listeriosis is highly prevalent in the animal farming industry, with as the causative pathogen. To identify potential therapeutic targets for LM infection, we investigated the mechanisms of LM infection in goat uteri. We inoculated a group of goats with LM via jugular vein injection, isolated and raised them, and subsequently collected sterile samples of their uterine tissue after they exhibited clinical symptoms of LM infection.

View Article and Find Full Text PDF

Infection by bacteria leads to tissue damage and inflammation, which need to be tightly controlled by host mechanisms to avoid deleterious consequences. It is previously reported that TMEM16F, a calcium-activated lipid scramblase expressed in various immune cell types including T cells and neutrophils, is critical for the control of infection by bacterium Listeria monocytogenes (Lm) in vivo. This function correlated with the capacity of TMEM16F to repair the plasma membrane (PM) damage induced in T cells in vitro, by the Lm toxin listeriolysin O (LLO).

View Article and Find Full Text PDF

Harnessing Microbial Effectors for Macrophage-Mediated Drug Delivery.

ACS Omega

April 2024

Experimental Medicine Research Group, Department of Medicine, Faculty of Medicine and Health Sciences, Stellenbosch University, Parow 7505, South Africa.

Macrophage-based drug delivery systems are promising, but their development is still in its infancy, with many limitations remaining to be addressed. Our aim was to design a system harnessing microbial effectors to facilitate controlled drug cargo expulsion from macrophages to enable the use of more toxic drugs without adding to the risk of off-target detrimental effects. The pore forming and actin polymerizing effectors listeriolysin-O (LLO) and actin assembly-inducing protein (ActA) were synthesized using a novel green fluorescent protein (GFP)-linked heterologous expression system.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!