PMID- 11429160 OWN - NLM STAT- MEDLINE DCOM- 20010823 LR - 20181130 IS - 1079-9907 (Print) IS - 1079-9907 (Linking) VI - 21 IP - 5 DP - 2001 May TI - Monocyte chemoattractant protein-1 expression by osteoblasts following infection with Staphylococcus aureus or Salmonella. PG - 297-304 AB - Two common pathogens of bone, Staphylococcus aureus and Salmonella, were investigated for their ability to induce chemokine expression in bone-forming osteoblasts. Cultured mouse or human osteoblasts could rapidly respond to bacterial infection by upregulating the mRNA encoding the chemokine, monocyte chemoattractant protein-1 (MCP-1). This rapid induction occurred on infection with either the gram-positive pathogen, S. aureus, or the gram-negative pathogen, Salmonella. Increased mRNA expression translated into MCP-1 secretion by cultured mouse or human osteoblasts in response to viable bacteria, whereas UV-killed bacteria were less effective in stimulating chemokine secretion. There was a dose-response relationship observed between the amount of input bacteria and increases in MCP-1 secretion. Immunohistochemical staining of infected osteoblasts indicated that the majority of cells could express MCP-1, with some osteoblasts having a higher intensity of staining than others. Organ cultures of mouse calvaria (skullcap) bone showed increases in MCP-1 immunostaining following bacterial infection. The immunoreactive MCP-1 in infected calvaria localized to areas containing active osteoblasts. Taken together, these studies demonstrate a conserved osteoblast-derived MCP-1 response to two very different pathogens of bone. FAU - Bost, K L AU - Bost KL AD - Department of Biology, University of North Carolina at Charlotte, 9201 University City Boulevard, Charlotte, NC 28223-0001, USA. klbost@email.unc.edu FAU - Bento, J L AU - Bento JL FAU - Petty, C C AU - Petty CC FAU - Schrum, L W AU - Schrum LW FAU - Hudson, M C AU - Hudson MC FAU - Marriott, I AU - Marriott I LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Interferon Cytokine Res JT - Journal of interferon & cytokine research : the official journal of the International Society for Interferon and Cytokine Research JID - 9507088 RN - 0 (Chemokine CCL2) RN - 0 (RNA, Messenger) SB - IM MH - Animals MH - Cells, Cultured MH - Chemokine CCL2/*biosynthesis/genetics/metabolism MH - Humans MH - Immunohistochemistry MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - Organ Culture Techniques MH - Osteoblasts/*metabolism/*microbiology MH - RNA, Messenger/biosynthesis/metabolism MH - Salmonella enterica/*immunology MH - Staphylococcus aureus/*immunology EDAT- 2001/06/29 10:00 MHDA- 2001/08/24 10:01 CRDT- 2001/06/29 10:00 PHST- 2001/06/29 10:00 [pubmed] PHST- 2001/08/24 10:01 [medline] PHST- 2001/06/29 10:00 [entrez] AID - 10.1089/107999001300177484 [doi] PST - ppublish SO - J Interferon Cytokine Res. 2001 May;21(5):297-304. doi: 10.1089/107999001300177484.