'Phagocytosis is central to bacterial clearance, but the exact mechanism is incompletely understood. Here, we show a novel and critical role for lumican, the connective tissue extracellular matrix small leucine-rich repeat proteoglycan, in CD14-mediated bacterial phagocytosis. In Psuedomonas aeruginosa lung infections, lumican-deficient (Lum(-/-)) mice failed to clear the bacterium from ... More
Multipotent stem cells from trabecular meshwork become phagocytic TM cells.
AuthorsDu Y, Roh DS, Mann MM, Funderburgh ML, Funderburgh JL, Schuman JS,
JournalInvest Ophthalmol Vis Sci
PubMed ID22297497
'To isolate and characterize stem cells from human trabecular meshwork (TM) and to investigate the potential of these stem cells to differentiate into TM cells. Human trabecular meshwork stem cells (TMSCs) were isolated as side population cells by fluorescence-activated cell sorting or isolated by clonal cultures. Passaged TMSCs were compared ... More
Antibody to Langerin/CD207 localizes large numbers of CD8alpha+ dendritic cells to the marginal zone of mouse spleen.
AuthorsIdoyaga J, Suda N, Suda K, Park CG, Steinman RM,
JournalProc Natl Acad Sci U S A
PubMed ID19168629
Dendritic cells (DCs) are strategically positioned to take up antigens and initiate adaptive immunity. One DC subset expresses CD8alphaalpha in mice and is specialized to capture dying cells and process antigens for MHC class I ... More
Functional dissociation of the basolateral transcytotic compartment from the apical phago-lysosomal compartment in human osteoclasts.
AuthorsMeagher J, Zellweger R, Filgueira L,
JournalJ Histochem Cytochem
PubMed ID15872059
Tartrate-resistant acid phosphatase (TRAP) is essential for elimination of Staphylococcus aureus, the main infectious agent responsible for osteomyelitis. This in vitro study investigated uptake and processing of fluorescence-labeled S. aureus by human osteoclasts and dendritic cells. The cells were stained for TRAP and the acidic compartment using a fluorescence-based protocol. ... More
Heterogeneity in macrophage phagocytosis of Staphylococcus aureus strains: high-throughput scanning cytometry-based analysis.
AuthorsDeLoid GM, Sulahian TH, Imrich A, Kobzik L,
JournalPLoS One
PubMed ID19593389
Alveolar macrophages (AMs) can phagocytose unopsonized pathogens such as S. aureus via innate immune receptors, such as scavenger receptors (SRs). Cytoskeletal events and signaling pathways involved in phagocytosis of unopsonized bacteria likely govern the fate of ingested pathogens, but are poorly characterized. We have developed a high-throughput scanning cytometry-based assay ... More
Opposite effects of simvastatin on the bactericidal and inflammatory response of macrophages to opsonized S. aureus.
AuthorsBenati D, Ferro M, Savino MT, Ulivieri C, Schiavo E, Nuccitelli A, Pasini FL, Baldari CT,
JournalJ Leukoc Biol
PubMed ID19892847
Besides lowering circulating cholesterol, statins act as immunomodulators. Although the effects of statins on lymphocyte activation and differentiation have been clearly defined, there is no consensus as to effects of these drugs on phagocytes. We have addressed the outcome of simvastatin treatment on the activation and effector function of human ... More