Legionella Pneumophila Transcriptome during Intracellular Multiplication in Human Macrophages.
Legionella Pneumophila Transcriptome during Intracellular Multiplication in Human Macrophages.
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DOI：
10.3389/fmicb.2011.00060
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发表时间：
2011
影响因子：
5.2
通讯作者：
Shuman HA
中科院分区：
文献类型：
--
作者：
Faucher SP;Mueller CA;Shuman HA
Legionella pneumophila is the causative agent of Legionnaires’ disease, an acute pulmonary infection. L. pneumophila is able to infect and multiply in both phagocytic protozoa, such as Acanthamoeba castellanii, and mammalian professional phagocytes. The best-known L. pneumophila virulence determinant is the Icm/Dot type IVB secretion system, which is used to translocate more than 150 effector proteins into host cells. While the transcriptional response of Legionella to the intracellular environment of A. castellanii has been investigated, much less is known about the Legionella transcriptional response inside human macrophages. In this study, the transcriptome of L. pneumophila was monitored during exponential and post-exponential phase in rich AYE broth as well as during infection of human cultured macrophages. This was accomplished with microarrays and an RNA amplification procedure called selective capture of transcribed sequences to detect small amounts of mRNA from low numbers of intracellular bacteria. Among the genes induced intracellularly are those involved in amino acid biosynthetic pathways leading to l-arginine, l-histidine, and l-proline as well as many transport systems involved in amino acid and iron uptake. Genes involved in catabolism of glycerol are also induced during intracellular growth, suggesting that glycerol could be used as a carbon source. The genes encoding the Icm/Dot system are not differentially expressed inside cells compared to control bacteria grown in rich broth, but the genes encoding several translocated effectors are strongly induced. Moreover, we used the transcriptome data to predict previously unrecognized Icm/Dot effector genes based on their expression pattern and confirmed translocation for three candidates. This study provides a comprehensive view of how L. pneumophila responds to the human macrophage intracellular environment.
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影响因子：
12.3
作者：
Gentleman RC;Carey VJ;Bates DM;Bolstad B;Dettling M;Dudoit S;Ellis B;Gautier L;Ge Y;Gentry J;Hornik K;Hothorn T;Huber W;Iacus S;Irizarry R;Leisch F;Li C;Maechler M;Rossini AJ;Sawitzki G;Smith C;Smyth G;Tierney L;Yang JY;Zhang J
通讯作者：
Zhang J
影响因子：
3.6
作者：
Eylert, Eva;Schaer, Jennifer;Eisenreich, Wolfgang
通讯作者：
Eisenreich, Wolfgang
DOI：
10.1164/ajrccm.149.3.8118629
发表时间：
1994-03-01
影响因子：
24.7
作者：
CARRATALA, J;GUDIOL, F;MANRESA, F
通讯作者：
MANRESA, F
影响因子：
3.4
作者：
Bruggemann, Holger;Hagman, Arne;Buchrieser, Carmen
通讯作者：
Buchrieser, Carmen
影响因子：
3.2
作者：
Charpentier, Xavier;Faucher, Sebastien P.;Shuman, Howard A.
通讯作者：
Shuman, Howard A.