Effects of Latilactobacillus sakei LZ217 on Gastric Mucosal Colonization, Metabolic Interference, and Urease Expression in Helicobacter pylori InfectionXia, Chenlan; Chen, Ziqi; Chen, Yongqiang; Wei, Fangtong; Wu, Shiying; Zhou, Qingqing; Li, Ping; Gu, Qing
2024 Helicobacter
doi: 10.1111/hel.13130pmid: 39152663
Emerging evidence suggests differential antagonism of lactic acid‐producing bacteria (LAB) to Helicobacter pylori, posing challenges to human health and food safety due to unclear mechanisms. This study assessed 21 LAB strains from various sources on H. pylori growth, urease activity, and coaggregation. Composite scoring revealed that Latilactobacillus sakei LZ217, derived from fresh milk, demonstrates strong inhibitory effects on both H. pylori growth and urease activity. L. sakei LZ217 significantly reduced H. pylori adherence of gastric cells in vitro, with inhibition ratios of 47.62%. Furthermore, in vivo results showed that L. sakei LZ217 alleviated H. pylori‐induced gastric mucosa damage and inflammation in mice. Metabolomic exploration revealed metabolic perturbations in H. pylori induced by L. sakei LZ217, including reduced amino acid levels (e.g., isoleucine, leucine, glutamate, aspartate, and phenylalanine) and impaired carbohydrate and nucleotide synthesis, contributing to the suppression of ureA (28.30%), ureE (84.88%), and ureF (59.59%) expressions in H. pylori. This study underscores the efficacy of LAB against H. pylori and highlights metabolic pathways as promising targets for future interventions against H. pylori growth and colonization.
Animal Models of Helicobacter pylori Infection and Vaccines: Current Status and Future ProspectsLiu, Zhili; Li, He; Huang, Xiaotian; Liu, Qiong
2024 Helicobacter
doi: 10.1111/hel.13119pmid: 39108210
Helicobacter pylori infection causes chronic gastritis, ulcers, and gastric cancer, making it a threat to human health. Despite the use of antibiotic therapy, the global prevalence of H. pylori infection remains high, necessitating early eradication measures. Immunotherapy, especially vaccine development, is a promising solution in this direction, albeit the selection of an appropriate animal model is critical in efficient vaccine production. Accordingly, we conducted a literature, search and summarized the commonly used H. pylori strains, H. pylori infection‐related animal models, and models for evaluating H. pylori vaccines. Based on factors such as the ability to replicate human diseases, strain compatibility, vaccine types, and eliciting of immune responses, we systematically compared the advantages and disadvantages of different animal models, to obtain the informed recommendations. In addition, we have proposed novel perspectives on H. pylori–related animal models to advance research and vaccine evaluation for the prevention and treatment of diseases such as gastric cancer.