Nontypeable Haemophilus influenzae inhibits autolysis and fratricide of Streptococcus pneumoniae in vitro.
Nontypeable Haemophilus influenzae inhibits autolysis and fratricide of Streptococcus pneumoniae in vitro.
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不可用的流感嗜血杆菌抑制肺炎链球菌的自溶和体外的自溶。
DOI：
10.1016/j.micinf.2013.11.006
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发表时间：
2014-03
影响因子：
5.8
通讯作者：
Kerschner JE
中科院分区：
文献类型：
--
作者：
Hong W;Khampang P;Erbe C;Kumar S;Taylor SR;Kerschner JE
Streptococcus pneumoniae (SP) and nontypeable Haemophilus influenzae (NTHi) are common commensals of the human airway and major bacterial pathogens of otitis media (OM) and other upper airway infections.它们之间的相互作用可能在多种微生物感染的发病机制中发挥重要作用。 Although previous studies suggested NTHi could promote pneumococcal survival and biofilm formation, how NTHi affects pneumococcal activities has not been defined. Our data in the present studies indicated that the outcome of the interaction between SP and NTHi was in a cell-density-dependent manner and the enhancement of pneumococcal survival happened at the later stages of culturing. Using quantitative PCR, we found that the expression of pneumococcal genes regulating autolysis and fratricide, lytA and cbpD, were significantly down-regulated in co-culture with NTHi. We further observed that influence of NTHi was not on direct cell-to-cell contact, but that this contact may contribute to the interaction between these two microorganisms. These results suggest that pneumococcal survival and biofilm formation can be enhanced by down-regulating pneumococcal cell wall hydrolase production thereby inhibiting pneumococcal autolysis and fratricide in the presence of NTHi.
Streptococcus pneumoniae (SP) and nontypeable Haemophilus influenzae (NTHi) are common commensals of the human airway and major bacterial pathogens of otitis media (OM) and other upper airway infections. The interaction between them may play an important role in the pathogenesis of polymicrobial infections. Although previous studies suggested NTHi could promote pneumococcal survival and biofilm formation, how NTHi affects pneumococcal activities has not been defined. Our data in the present studies indicated that the outcome of the interaction between SP and NTHi was in a cell-density-dependent manner and the enhancement of pneumococcal survival happened at the later stages of culturing. Using quantitative PCR, we found that the expression of pneumococcal genes regulating autolysis and fratricide, lytA and cbpD, were significantly down-regulated in co-culture with NTHi. We further observed that influence of NTHi was not on direct cell-to-cell contact, but that this contact may contribute to the interaction between these two microorganisms. These results suggest that pneumococcal survival and biofilm formation can be enhanced by down-regulating pneumococcal cell wall hydrolase production thereby inhibiting pneumococcal autolysis and fratricide in the presence of NTHi.
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影响因子：
3.6
作者：
Black, S;Shinefield, H;Edwards, K
通讯作者：
Edwards, K
影响因子：
6.7
作者：
Lysenko ES;Ratner AJ;Nelson AL;Weiser JN
通讯作者：
Weiser JN
影响因子：
5.5
作者：
Jacoby P;Watson K;Bowman J;Taylor A;Riley TV;Smith DW;Lehmann D;Kalgoorlie Otitis Media Research Project Team
通讯作者：
Kalgoorlie Otitis Media Research Project Team
影响因子：
14.2
作者：
Jourdain, S.;Smeesters, P. R.;Vergison, A.
通讯作者：
Vergison, A.
影响因子：
4.4
作者：
Holm, C;Jespersen, L
通讯作者：
Jespersen, L