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Humoral and cellular immune responses induced by serogroup W135 meningococcal conjugate and polysaccharide vaccines.
Cheng, Yahui; Shen, Rong; Liu, Fanglei; Li, Yanting; Wang, Jing; Hou, Yali; Liu, Yueping; Zhou, Haifei; Hou, Fengping; Wang, Yunjin; Li, Xiongxiong; Qiao, Ruijie; Luo, Shuquan.
Afiliação
  • Cheng Y; Lanzhou Institute of Biological Products Co., Ltd., Lanzhou 730046, China.
  • Shen R; Lanzhou Institute of Biological Products Co., Ltd., Lanzhou 730046, China.
  • Liu F; Lanzhou Institute of Biological Products Co., Ltd., Lanzhou 730046, China.
  • Li Y; Lanzhou Institute of Biological Products Co., Ltd., Lanzhou 730046, China.
  • Wang J; Lanzhou Institute of Biological Products Co., Ltd., Lanzhou 730046, China.
  • Hou Y; Lanzhou Institute of Biological Products Co., Ltd., Lanzhou 730046, China.
  • Liu Y; Lanzhou Institute of Biological Products Co., Ltd., Lanzhou 730046, China.
  • Zhou H; Lanzhou Institute of Biological Products Co., Ltd., Lanzhou 730046, China.
  • Hou F; Lanzhou Institute of Biological Products Co., Ltd., Lanzhou 730046, China.
  • Wang Y; Lanzhou Institute of Biological Products Co., Ltd., Lanzhou 730046, China.
  • Li X; Lanzhou Institute of Biological Products Co., Ltd., Lanzhou 730046, China.
  • Qiao R; Lanzhou Institute of Biological Products Co., Ltd., Lanzhou 730046, China. Electronic address: Qruijie@126.com.
  • Luo S; Lanzhou Institute of Biological Products Co., Ltd., Lanzhou 730046, China. Electronic address: sqluo@vacmic.com.
Vaccine ; 42(11): 2781-2792, 2024 Apr 19.
Article em En | MEDLINE | ID: mdl-38508928
ABSTRACT
Investigating the mechanisms by which W135 meningococcal conjugate (PSW135-TT) activates adaptive immune responses in mice can provide a comprehensive understanding of the immune mechanisms of bacterial polysaccharide conjugate vaccines. We compared B-cell and T-cell immune responses immunized with W135 meningococcal capsular polysaccharides (PSW135), tetanus toxoid (TT) and PSW135-TT in mice. The results showed that PSW135-TT could induce higher PSW135-specific and TT-specific IgG antibodies with a significant enhancement after two doses. All serum antibodies immunized with PSW135- TT had strong bactericidal activity, whereas none of the serum antibodies immunized with PSW135 had bactericidal activity. Besides, IgM and IgG antibodies immunized with PSW135-TT after two doses were positively correlated with the titer of bactericidal antibodies. We also found Th cells favored Th2 humoral immune responses in PSW135-TT, PSW135, and TT-immunized mice, especially peripheral blood lymphocytes. Furthermore, PSW135-TT and TT could effectively activate bone marrow derived dendritic cells (BMDCs) and promote BMDCs to highly express major histocompatibility complex Ⅱ (MHCⅡ), CD86 and CD40 molecules in mice, whereas PSW135 couldn't. These data verified the typical characteristics of PSW135-TT and TT as T cell dependent antigen (TD-Ag) and PSW135 as T cell independent antigen (TI-Ag), which will be very helpful for further exploration of the immune mechanism of polysaccharide-protein conjugate vaccines and improvement of the quality of bacterial polysaccharide conjugate vaccines in future.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Vacinas Meningocócicas / Neisseria meningitidis Sorogrupo W-135 / Infecções Meningocócicas Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Vacinas Meningocócicas / Neisseria meningitidis Sorogrupo W-135 / Infecções Meningocócicas Idioma: En Ano de publicação: 2024 Tipo de documento: Article