Scholarlink

<p>Pneumococcal meningitis is the most common form of bacterial meningitis, with high case fatality rates. Bacterial genetics influence disease severity, but the underlying mechanisms remain poorly understood. Here, we evaluated top variants from a genome-wide association study (GWAS) linking <i>Streptococcus pneumoniae</i> genetic variation to disease outcome. Fifteen <i>S. pneumoniae</i> knockout mutants were tested for virulence in a zebrafish embryo meningitis model; six showed reduced virulence compared to wild-type, but four were excluded following competitive index and growth assays. Loss of <i>SPV_1044 (lacR)</i> and <i>SPV_1393 (trxB)</i> resulted in lower bacterial loads, impaired neuroinvasion and a reduced inflammatory response. Furthermore, deletion of <i>lacR</i>, encoding a regulator of galactose metabolism, led to delayed growth in galactose and human cerebrospinal fluid. Deletion of <i>trxB</i>, encoding thioredoxin reductase, increased susceptibility to oxidative stress. This proof-of-concept study, combining pathogen GWAS with in vivo validation, identifies two pneumococcal virulence genes linked to disease severity.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

LacR and TrxB are key virulence factors involved in pneumococcal meningitis as identified by a genome-wide association study

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月8日

查看全文
  • Rutger Koning,
  • Kin Ki Jim,
  • Philip H. C. Kremer,
  • Hsueh-Chien Raymond Cheng,
  • Valery Jaspers,
  • Mans Perez,
  • Bart Ferwerda,
  • Bevika Sewgoolam,
  • Roy Ummels,
  • Maikel Boot,
  • John A. Lees,
  • Stephen D. Bentley,
  • Jan-Willem Veening,
  • Christina M.J.E. Vandenbroucke-Grauls,
  • Matthijs C. Brouwer,
  • Diederik van de Beek

摘要

Pneumococcal meningitis is the most common form of bacterial meningitis, with high case fatality rates. Bacterial genetics influence disease severity, but the underlying mechanisms remain poorly understood. Here, we evaluated top variants from a genome-wide association study (GWAS) linking Streptococcus pneumoniae genetic variation to disease outcome. Fifteen S. pneumoniae knockout mutants were tested for virulence in a zebrafish embryo meningitis model; six showed reduced virulence compared to wild-type, but four were excluded following competitive index and growth assays. Loss of SPV_1044 (lacR) and SPV_1393 (trxB) resulted in lower bacterial loads, impaired neuroinvasion and a reduced inflammatory response. Furthermore, deletion of lacR, encoding a regulator of galactose metabolism, led to delayed growth in galactose and human cerebrospinal fluid. Deletion of trxB, encoding thioredoxin reductase, increased susceptibility to oxidative stress. This proof-of-concept study, combining pathogen GWAS with in vivo validation, identifies two pneumococcal virulence genes linked to disease severity.