BiXia Liu, YaRu Gu, YangXue Ou, LuXuan Liu, WenHao Wang, JinRui Zhou, Ying Wang, YeXiang Du, Jing Xie, Yuan Liu, Rui Zhang, QianFei Zuo, Bin Wang
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引用次数: 0
Abstract
Klebsiella pneumoniae is the principal cause of hospital-acquired infection with a high morbidity and mortality in immunocompromised individuals, yet no vaccine is approved. Here, we developed a novel bivalent subunit vaccine for the prevention of K. pneumoniae infection based on the outer membrane protein GlnH and the fimbriae protein FimA. The survival rate of immunized mice was significantly increased compared to that of unimmunized mice, while the bacterial burden, weight loss, and lung pathology were drastically reduced. Furthermore, vaccine-elicited CD4+ TRM cells were observed in lung tissues and appeared to play a critical role in vaccine efficacy. Transcriptomic analysis of total lung tissues from mice treated by FTY720 (S1PR1 inhibitor that blocks lymphocyte egress from secondary lymphoid structures) showed that cell activation, cytokine secretion and enhancement of the killing ability of neutrophils were related to the mechanism of protection against K. pneumoniae infection. These findings indicate that GlnH and FimA are effective candidate bivalent vaccine to fight K. pneumoniae infection.
期刊介绍:
Microbes and Infection publishes 10 peer-reviewed issues per year in all fields of infection and immunity, covering the different levels of host-microbe interactions, and in particular:
the molecular biology and cell biology of the crosstalk between hosts (human and model organisms) and microbes (viruses, bacteria, parasites and fungi), including molecular virulence and evasion mechanisms.
the immune response to infection, including pathogenesis and host susceptibility.
emerging human infectious diseases.
systems immunology.
molecular epidemiology/genetics of host pathogen interactions.
microbiota and host "interactions".
vaccine development, including novel strategies and adjuvants.
Clinical studies, accounts of clinical trials and biomarker studies in infectious diseases are within the scope of the journal.
Microbes and Infection publishes articles on human pathogens or pathogens of model systems. However, articles on other microbes can be published if they contribute to our understanding of basic mechanisms of host-pathogen interactions. Purely descriptive and preliminary studies are discouraged.