期刊
NATURE COMMUNICATIONS
卷 13, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41467-022-32916-7
关键词
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资金
- National Institutes of Health [NICHD R01 HD090061]
- NIH [CA68485, DK20593, DK58404, DK59637, EY08126, T32 HL007411-36S1, 2T32AI112541-06, K08AI151100, 7K12HD000850-37, F32HD100087, R01AI134036, P30DK058404]
- Office of Medical Research, Department of Veterans Affairs [I01 BX005352-01]
- Vanderbilt Faculty Research Scholars Award
- National Science Foundation [NSF HRD2112556]
- NSF [1847804]
- Global Alliance to Prevent Prematurity and Stillbirth project [N015615]
- March of Dimes
- National Institutes of Health Childhood Infections Research Program [T32-AI095202]
- Thomas S. Whittam Graduate Fellowship at Michigan State University
- Rudolph Hugh Graduate Fellowship at Michigan State University
- Graduate School at Michigan State University
- National Center for Research Resources [UL1 RR024975-01]
- National Center for Advancing Translational Sciences [2 UL1 TR000445-06]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1847804] Funding Source: National Science Foundation
This study reveals that the gene cadD in Group B Streptococcus (GBS) enhances metal resistance in macrophages, reducing metal toxicity and promoting bacterial proliferation in the pregnant host. Deletion of cadD decreases GBS survival in macrophages and reduces invasion in gestational tissues.
Perinatal infection with Streptococcus agalactiae, or Group B Streptococcus (GBS), is associated with preterm birth, neonatal sepsis, and stillbirth. Here, we study the interactions of GBS with macrophages, essential sentinel immune cells that defend the gravid reproductive tract. Transcriptional analyses of GBS-macrophage co-cultures reveal enhanced expression of a gene encoding a putative metal resistance determinant, cadD. Deletion of cadD reduces GBS survival in macrophages, metal efflux, and resistance to metal toxicity. In a mouse model of ascending infection during pregnancy, the Delta cadD strain displays attenuated bacterial burden, inflammation, and cytokine production in gestational tissues. Furthermore, depletion of host macrophages alters cytokine expression and decreases GBS invasion in a cadD-dependent fashion. Our results indicate that GBS cadD plays an important role in metal detoxification, which promotes immune evasion and bacterial proliferation in the pregnant host.
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