Bacteria as cell surface markers on normal and malignant mammalian cells

1971 ◽  
Vol 27 (11) ◽  
pp. 1321-1322 ◽  
Author(s):  
P. S. Meadows
Keyword(s):  
Cell Surface ◽  
Mammalian Cells ◽  
Surface Markers ◽  
Cell Surface Markers

scholarly journals Bifidobacterial Species Differentially Affect Expression of Cell Surface Markers and Cytokines of Dendritic Cells Harvested from Cord Blood

2004 ◽  
Vol 11 (4) ◽  
pp. 686-690 ◽  
Author(s):  
Sarah L. Young ◽  
Mary A. Simon ◽  
Margaret A. Baird ◽  
Gerald W. Tannock ◽  
Rodrigo Bibiloni ◽  
...  
Keyword(s):  
Immune Response ◽  
Dendritic Cells ◽  
Cell Surface ◽  
Cord Blood ◽  
Cell Activation ◽  
Bifidobacterium Longum ◽  
Surface Markers ◽  
Cell Surface Markers ◽  
Atopic Diseases ◽  
Dendritic Cell Activation

ABSTRACT The gut microbiota may be important in the postnatal development of the immune system and hence may influence the prevalence of atopic diseases. Bifidobacteria are the most numerous bacteria in the guts of infants, and the presence or absence of certain species could be important in determining the geographic incidence of atopic diseases. We compared the fecal populations of bifidobacteria from children aged 25 to 35 days in Ghana (which has a low prevalence of atopy), New Zealand, and the United Kingdom (high-prevalence countries). Natal origin influenced the detection of bifidobacterial species in that fecal samples from Ghana almost all contained Bifidobacterium infantis whereas those of the other children did not. Choosing species on the basis of our bacteriological results, we tested bifidobacterial preparations for their effects on cell surface markers and cytokine production by dendritic cells harvested from cord blood. Species-specific effects on the expression of the dendritic-cell activation marker CD83 and the production of interleukin-10 (IL-10) were observed. Whereas CD83 expression was increased and IL-10 production was induced by Bifidobacterium bifidum, Bifidobacterium longum, and Bifidobacterium pseudocatenulatum, B. infantis failed to produce these effects. We concluded that B. infantis does not trigger the activation of dendritic cells to the degree necessary to initiate an immune response but that B. bifidum, B. longum, and B. pseudocatenulatum induce a Th2-driven immune response. A hypothesis is presented to link our observations to the prevalence of atopic diseases in different countries.

Neonatal stem cells exhibit specific characteristics in function, proliferation, and cellular signaling that distinguish them from their adult counterparts

2008 ◽  
Vol 294 (5) ◽  
pp. R1491-R1497 ◽  
Author(s):  
Troy A. Markel ◽  
Meijing Wang ◽  
Paul R. Crisostomo ◽  
Maiuxi C. Manukyan ◽  
Jeffrey A. Poynter ◽  
...  
Keyword(s):  
Stem Cells ◽  
Cell Surface ◽  
Surface Markers ◽  
Cell Surface Markers ◽  
Local Inflammatory Response ◽  
Cell Counts ◽  
Marrow Mesenchymal Stem Cells ◽  
Growth Factor Production ◽  
Erk Inhibition ◽  
Different Levels

Stem cells may be a novel treatment modality for organ ischemia, possibly through beneficial paracrine mechanisms. Stem cells from older hosts have been shown to exhibit decreased function during stress. We therefore hypothesized that 1) neonatal bone marrow mesenchymal stem cells (nBMSCs) would produce different levels of IL-6, VEGF, and IGF-1 compared with adults (aBMSCs) when stimulated with TNF or LPS; 2) differences in cytokines would be due to distinct cellular characteristics, such as proliferation or pluripotent potential; and 3) differences in cytokines would be associated with differences in p38 MAPK and ERK signaling within nBMSCs. BMSCs were isolated from adult and neonatal mice. Cells were exposed to TNF or LPS with or without p38 or ERK inhibition. Growth factors were measured via ELISA, proliferation via daily cell counts, cell surface markers via flow cytometry, and pluripotent potential via alkaline phosphatase activity. nBMSCs produced lower levels of IL-6 and VEGF, but higher levels of IGF-1 under basal conditions, as well as after stimulation with TNF, but not LPS. Neonatal and adult BMSCs had similar pluripotent potentials and cell surface markers, but nBMSCs proliferated faster. Furthermore, p38 and ERK appeared to play a more substantial role in nBMSC cytokine and growth factor production. Neonatal stem cells may aid in decreasing the local inflammatory response during ischemia, and could possibly be expanded more rapidly than adult cells prior to therapeutic use.

Immunoenzymatic staining methods for simultaneous demonstration of chromosomes and cell surface markers

1987 ◽  
Vol 27 (2) ◽  
pp. 229-240 ◽  
Author(s):  
Oskar A. Haas ◽  
Ursula Köller ◽  
Peter Ambros ◽  
Rosa Kornmüller ◽  
Otto Majdic ◽  
...  
Keyword(s):  
Cell Surface ◽  
Surface Markers ◽  
Cell Surface Markers ◽  
Staining Methods
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