Qing Liu

Publications48
h-index15
Citations780
Highly Influential Citations19
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Effect of Deletion of Genes Involved in Lipopolysaccharide Core and O-Antigen Synthesis on Virulence and Immunogenicity of Salmonella enterica Serovar Typhimurium
TLDR
The results indicate that nonreversible truncation of the outer core is not a viable option for developing a live oral Salmonella vaccine, while a wzy mutant that retains one O-antigen unit is adequate for stimulating the optimal protective immunity to homologous or heterologous antigens by oral, intranasal, or intraperitoneal routes of administration.
Salmonella Synthesizing 1-Monophosphorylated Lipopolysaccharide Exhibits Low Endotoxic Activity while Retaining Its Immunogenicity
TLDR
Rec recombinant, plasmid-free strains of Salmonella are constructed that produce predominantly 1-dephosphorylated lipid A, similar to the adjuvant approved for human use, and mice inoculated with these detoxified strains were protected against wild-type challenge.
Genetically engineered Salmonella Typhimurium: Recent advances in cancer therapy.
Phosphate Groups of Lipid A Are Essential for Salmonella enterica Serovar Typhimurium Virulence and Affect Innate and Adaptive Immunity
TLDR
Attenuated and dephosphorylated Salmonella vaccines were able to induce adaptive immunity against heterologous (PspA of Streptococcus pneumoniae) and homologous antigens (lipopolysaccharide [LPS] and outer membrane proteins [OMPs]).
Outer membrane vesicles derived from Salmonella Typhimurium mutants with truncated LPS induce cross-protective immune responses against infection of Salmonella enterica serovars in the mouse model.
Regulated Delayed Expression of rfaH in an Attenuated Salmonellaenterica Serovar Typhimurium Vaccine Enhances Immunogenicity of Outer Membrane Proteins and a Heterologous Antigen
TLDR
Three mutant strains of rfaH were constructed that expressed different levels of RfaH by altering the ribosome-binding sequence and start codon and led to increased levels of protection compared to that of the parent χ9241 and of a ΔrfaH derivative of χ 9241.
Outer membrane vesicles from flagellin-deficient Salmonella enterica serovar Typhimurium induce cross-reactive immunity and provide cross-protection against heterologous Salmonella challenge
TLDR
The results indicate that the flagellin-deficient OMVs may represent a new vaccine platform that could be exploited to facilitate the production of a broadly protective vaccine.
Regulated delayed synthesis of lipopolysaccharide and enterobacterial common antigen of Salmonella Typhimurium enhances immunogenicity and cross-protective efficacy against heterologous Salmonella…
Outer Membrane Vesicles Derived from Salmonella Enteritidis Protect against the Virulent Wild-Type Strain Infection in a Mouse Model.
TLDR
Native OMVs used in immunizations by either the intranasal route or the intraperitoneal route could elicit significant humoral and mucosal immune responses and provide strong protective efficiency against a lethal dose of wild-type S. Enteritidis infection.
Identification of the crp gene in avian Pasteurella multocida and evaluation of the effects of crp deletion on its phenotype, virulence and immunogenicity
TLDR
The deletion of the crp gene has an inhibitory effect on bacterial growth and bacterial resistance to serum complement in vitro and aiding the formulation of a novel vaccine against P. multocida.
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