PMID- 11564157 OWN - NLM STAT- MEDLINE DCOM- 20020122 LR - 20180822 IS - 0818-9641 (Print) IS - 0818-9641 (Linking) VI - 79 IP - 5 DP - 2001 Oct TI - Induction of multiple chemokine and colony-stimulating factor genes in experimental Burkholderia pseudomallei infection. PG - 490-501 AB - Melioidosis is a disease of the tropics caused by the facultative intracellular bacterium Burkholderia pseudomallei. In human infection, increased levels of IFN-gamma in addition to the chemokines interferon-gamma-inducible protein 10 (IP-10) and monocyte interferon-gamma-inducible protein (Mig) have been demonstrated. However, the role of these and other chemokines in the pathogenesis of melioidosis remains unknown. Using BALB/c and C57BL/6 mice as models of the acute and chronic forms of human melioidosis, the induction of mRNA was assessed for various chemokines and CSF (G-CSF, M-CSF, GM-CSF, IP-10, Mig, RANTES, MCP-1, KC and MIP-2) in spleen and liver following B. pseudomallei infection. Patterns of chemokine and CSF induction were similar in liver and spleen; however, responses were typically greater in spleen, which reflected higher tissue bacterial loads. In BALB/c mice, high-level expression of mRNA for all chemokines and CSF investigated was demonstrated at day 3 postinfection, correlating with peak bacterial load and extensive infiltration of leucocytes. In contrast, increased mRNA expression and bacterial numbers in C57BL/6 mice were greatest between 4 and 14 days following infection. This paralleled increases in the size and number of abscesses in liver and spleen of C57BL/6 mice at days 3 and 14 postinfection. Earlier induction of cytokine-induced neutrophil chemoattractant (KC), macrophage inflammatory protein-2 (MIP-2), monocyte chemoattractant protein-1 (MCP-1), granulocyte-macrophage CSF (GM-CSF) and macrophage CSF (M-CSF) mRNA was demonstrated in spleen, while MIP-2, MCP-1, IP-10 and Mig were demonstrated in liver of BALB/c mice when compared to spleen and liver of C57BL/6. The magnitude of cellular responses observed in the tissue correlated with increased levels of the chemokines and CSF investigated, as well as bacterial load. Compared with C57BL/6 mice, greater infiltration of neutrophils was observed in liver and spleen of BALB/c mice at day 3. In contrast, early lesions in C57BL/6 mice predominantly comprised macrophages. These results suggest that the inability of BALB/c mice to contain the infection at sites of inflammation may underlie the susceptible phenotype of this mouse strain towards B. pseudomallei infection. FAU - Barnes, J L AU - Barnes JL AD - School of Biomedical Science, James Cook University, Townsville, Queensland, Australia. jodie.barnes@jcu.edu.au FAU - Ulett, G C AU - Ulett GC FAU - Ketheesan, N AU - Ketheesan N FAU - Clair, T AU - Clair T FAU - Summers, P M AU - Summers PM FAU - Hirst, R G AU - Hirst RG LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Immunol Cell Biol JT - Immunology and cell biology JID - 8706300 RN - 0 (Chemokines) RN - 0 (Colony-Stimulating Factors) RN - 0 (RNA, Messenger) SB - IM MH - Animals MH - Burkholderia pseudomallei/growth & development/*immunology/physiology MH - Chemokines/*genetics/metabolism MH - Colony-Stimulating Factors/*genetics/metabolism MH - Disease Models, Animal MH - *Gene Expression Regulation MH - Humans MH - Liver/immunology/microbiology MH - Melioidosis/genetics/*immunology/microbiology MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - RNA, Messenger/genetics/metabolism MH - Reverse Transcriptase Polymerase Chain Reaction MH - Spleen/immunology/microbiology EDAT- 2001/09/21 10:00 MHDA- 2002/01/23 10:01 CRDT- 2001/09/21 10:00 PHST- 2001/09/21 10:00 [pubmed] PHST- 2002/01/23 10:01 [medline] PHST- 2001/09/21 10:00 [entrez] AID - icb1038 [pii] AID - 10.1046/j.1440-1711.2001.01038.x [doi] PST - ppublish SO - Immunol Cell Biol. 2001 Oct;79(5):490-501. doi: 10.1046/j.1440-1711.2001.01038.x.