scholarly journals Monocyte-Derived Human Macrophages and Peripheral Blood Mononuclear Cells Infected with Ebola Virus Secrete MIP-1α and TNF-α and Inhibit Poly-IC-Induced IFN-α in Vitro

Virology ◽  
2001 ◽  
Vol 284 (1) ◽  
pp. 20-25 ◽  
Author(s):  
Manisha Gupta ◽  
Siddhartha Mahanty ◽  
Rafi Ahmed ◽  
Pierre E. Rollin
Keyword(s):  
Peripheral Blood Mononuclear Cells ◽  
Peripheral Blood ◽  
Ebola Virus ◽  
Mononuclear Cells ◽  
Peripheral Blood Mononuclear ◽  
Human Macrophages ◽  
Tnf Α ◽  
Blood Mononuclear Cells

scholarly journals Modulation of TNF-α Secretion in Peripheral Blood Mononuclear Cells by Cocoa Flavanols and Procyanidins

2002 ◽  
Vol 9 (3) ◽  
pp. 135-141 ◽  
Author(s):  
T. K. Mao ◽  
J. van de Water ◽  
C. L. Keen ◽  
H. H. Schmitz ◽  
M. E. Gershwin
Keyword(s):  
Peripheral Blood Mononuclear Cells ◽  
Peripheral Blood ◽  
Mononuclear Cells ◽  
Human Peripheral Blood ◽  
Resting Cells ◽  
Peripheral Blood Mononuclear ◽  
Tnf Α ◽  
Blood Mononuclear Cells ◽  
Stimulation Of

Epidemiological reports have suggested that the consumption of foods rich in flavonoids is associated with a lower incidence of certain degenerative diseases, including cardiovascular disease. Flavanols and their related oligomers, the procyanidins CFP, isolated from cocoa can modulate the production and level of several signaling molecules associated with immune function and inflammationin vitro, including several cytokines and eicosanoids. To further elucidate the potential immuno-modulatory functions of flavanol-rich cocoa, the present investigation examined whether isolated CFP fractions (monomers through decamers) influence the secretion of tumor necrosis factor-α (TNF-α) from resting and phytohemagluttinin (PHA)-stimulated human peripheral blood mononuclear cells (PBMC). We used anin vitroculture system where PBMC from 14 healthy subjects were introduced to individual CFP fractions for 72 h prior to measuring the levels of TNF-α released. The intermediate-sized CFP fractions (tetramers through octamers) were the most active on resting cells, causing a 3–4 fold increase in TNF-α relative to media baseline. The monomers and dimers were the least stimulatory of the fractions tested, displaying a 42 and 31% increase, respectively, over media control, whereas the trimers, nonamers and decamers showed an intermediate stimulation of this cytokine. In the presence of PHA, the intermediate-sized CFP fractions again were the most active, enhancing TNF-α secretion in the range of 48–128% relative to the PHA control. The monomers and dimers were slightly inhibitory (–1.5 and –15%, respectively), while trimers, nonamers and decamers stimulated moderate increases in TNF-α levels (13, 19 and 15%, respectively). The above results lend support to the concept that CFP can be immunomodulatory. The stimulation of TNF-α secretion may contribute to the putative beneficial effects of dietary flavanoids against microbial infection and tumorigenesis.

scholarly journals Oral lactobacillus strains reduce cytotoxicity and cytokine release from peripheral blood mononuclear cells exposed to Aggregatibacter actinomycetemcomitans subtypes in vitro.

2020 ◽  
Author(s):  
Nuntiya Pahumunto ◽  
Amina Basic ◽  
Anna-Karin Östberg ◽  
Rawee Teanpaisan ◽  
Gunnar Dahlen
Keyword(s):  
Peripheral Blood Mononuclear Cells ◽  
Peripheral Blood ◽  
Blood Donors ◽  
Mononuclear Cells ◽  
Aggregatibacter Actinomycetemcomitans ◽  
Cytokine Release ◽  
Peripheral Blood Mononuclear ◽  
Tnf Α ◽  
Blood Mononuclear Cells

Abstract Background: This study evaluated the effect of oral lactobacilli on the cytotoxicity and cytokine release from peripheral blood mononuclear cells (PBMCs) when exposed to Aggregatibacter actinomycetemcomitans subtypes in vitro. The supernatants and cell wall extracts (CWEs) of eight A. actinomycetemcomitans strains, representing different subtypes, and three Lactobacillus strains were used. The PBMCs from six blood donors were exposed to supernatants and CWEs of A. actinomycetemcomitans or Lactobacillus strains alone or combinations and untreated cells as control. The cytotoxicity was determined by trypan blue exclusion method and IL-1β secretion by ELISA. TNF-α, IL-6, and IL-8 secretions were measured using Bioplex Multiplex Immunoassay. Results: Supernatants or CWEs from all bacterial strains showed cytotoxicity and IL-1β secretion and the subtypes of A. actinomycetemcomitans showed generally a significantly higher effect on PBMCs than that of the Lactobacillus strains. Two highly toxic A. actinomycetemcomitans strains (JP2 and JP2-like) induced a higher response than all other strains. When combined, Lactobacillus significantly reduced the toxicity and the IL-1β secretion induced by A. acinomycetemcomitans. The effect varied between the subtypes and the reduction was highest for the JP2 and JP2-like strains. The Lactobacillus paracasei strain SD1 had a higher reducing effect than the other Lactobacillus strains. This strain had a consistent reducing effect on all subtypes of A. actinomycetemcomitans cytotoxicity, and release of IL-1β, IL-6, IL-8, and TNF-α from PBMCs of the blood donors. A strong and significant variation in cytokine release between the six blood donors was noticed.Conclusions: Lactobacillus spp. and L. paracasei SD1 in particular, showed a limited but statistically significant reducing interaction with A. actinomycetemcomitans toxicity and release of cytokines in vitro.

scholarly journals Oral Lactobacillus strains reduce cytotoxicity and cytokine release from peripheral blood mononuclear cells exposed to Aggregatibacter actinomycetemcomitans subtypes in vitro

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Nuntiya Pahumunto ◽  
Amina Basic ◽  
Anna-Karin Östberg ◽  
Rawee Teanpaisan ◽  
Gunnar Dahlen
Keyword(s):  
Peripheral Blood Mononuclear Cells ◽  
Peripheral Blood ◽  
Blood Donors ◽  
Mononuclear Cells ◽  
Aggregatibacter Actinomycetemcomitans ◽  
Cytokine Release ◽  
Peripheral Blood Mononuclear ◽  
Tnf Α ◽  
Blood Mononuclear Cells

Abstract Background This study evaluated the effect of oral lactobacilli on the cytotoxicity and cytokine release from peripheral blood mononuclear cells (PBMCs) when exposed to Aggregatibacter actinomycetemcomitans subtypes in vitro. The supernatants and cell wall extracts (CWEs) of eight A. actinomycetemcomitans strains, representing different subtypes, and three Lactobacillus strains were used. The PBMCs from six blood donors were exposed to supernatants and CWEs of A. actinomycetemcomitans or Lactobacillus strains alone or combinations and untreated cells as control. The cytotoxicity was determined by trypan blue exclusion method and IL-1β secretion by ELISA. TNF-α, IL-6, and IL-8 secretions were measured using Bioplex Multiplex Immunoassay. Results Supernatants or CWEs from all bacterial strains showed cytotoxicity and IL-1β secretion and the subtypes of A. actinomycetemcomitans showed generally a significantly higher effect on PBMCs than that of the Lactobacillus strains. Two highly toxic A. actinomycetemcomitans strains (JP2 and JP2-like) induced a higher response than all other strains. When combined, Lactobacillus significantly reduced the toxicity and the IL-1β secretion induced by A. acinomycetemcomitans. The effect varied between the subtypes and the reduction was highest for the JP2 and JP2-like strains. The Lactobacillus paracasei strain SD1 had a higher reducing effect than the other Lactobacillus strains. This strain had a consistent reducing effect on all subtypes of A. actinomycetemcomitans cytotoxicity, and release of IL-1β, IL-6, IL-8, and TNF-α from PBMCs of the blood donors. A strong and significant variation in cytokine release between the six blood donors was noticed. Conclusions Lactobacillus spp. and L. paracasei SD1 in particular, showed a limited but statistically significant reducing interaction with A. actinomycetemcomitans toxicity and release of cytokines in vitro.

scholarly journals Oral Lactobacillus strains reduce cytotoxicity and cytokine release from peripheral blood mononuclear cells exposed to Aggregatibacter actinomycetemcomitans subtypes in vitro.

2020 ◽  
Author(s):  
Nuntiya Pahumunto ◽  
Amina Basic ◽  
Anna-Karin Östberg ◽  
Rawee Teanpaisan ◽  
Gunnar Dahlen
Keyword(s):  
Peripheral Blood Mononuclear Cells ◽  
Peripheral Blood ◽  
Blood Donors ◽  
Mononuclear Cells ◽  
Aggregatibacter Actinomycetemcomitans ◽  
Cytokine Release ◽  
Peripheral Blood Mononuclear ◽  
Tnf Α ◽  
Blood Mononuclear Cells

Abstract Background: This study evaluated the effect of oral lactobacilli on the cytotoxicity and cytokine release from peripheral blood mononuclear cells (PBMCs) when exposed to Aggregatibacter actinomycetemcomitans subtypes in vitro. The supernatants and cell wall extracts (CWEs) of eight A. actinomycetemcomitans strains, representing different subtypes, and three Lactobacillus strains were used. The PBMCs from six blood donors were exposed to supernatants and CWEs of A. actinomycetemcomitans or Lactobacillus strains alone or combinations and untreated cells as control. The cytotoxicity was determined by trypan blue exclusion method and IL-1β secretion by ELISA. TNF-α, IL-6, and IL-8 secretions were measured using Bioplex Multiplex Immunoassay. Results: Supernatants or CWEs from all bacterial strains showed cytotoxicity and IL-1β secretion and the subtypes of A. actinomycetemcomitans showed generally a significantly higher effect on PBMCs than that of the Lactobacillus strains. Two highly toxic A. actinomycetemcomitans strains (JP2 and JP2-like) induced a higher response than all other strains. When combined, Lactobacillus significantly reduced the toxicity and the IL-1β secretion induced by A. acinomycetemcomitans . The effect varied between the subtypes and the reduction was highest for the JP2 and JP2-like strains. The Lactobacillus paracasei strain SD1 had a higher reducing effect than the other Lactobacillus strains. This strain had a consistent reducing effect on all subtypes of A. actinomycetemcomitans cytotoxicity, and release of IL-1β , IL-6, IL-8, and TNF-α from PBMCs of the blood donors. A strong and significant variation in cytokine release between the six blood donors was noticed. Conclusions: Lactobacillus spp. and L. paracasei SD1 in particular, showed a limited but statistically significant reducing interaction with A. actinomycetemcomitans toxicity and release of cytokines in vitro .

scholarly journals Oral lactobacilli reduce cytotoxicity and cytokine release from peripheral blood mononuclear cells exposed to Aggregatibacter actinomycetemcomitans subtypes in vitro.

2020 ◽  
Author(s):  
Nuntiya Pahumunto ◽  
Amina Basic ◽  
Anna-Karin Östberg ◽  
Rawee Teanpaisan ◽  
Gunnar Dahlen
Keyword(s):  
Peripheral Blood Mononuclear Cells ◽  
Peripheral Blood ◽  
Blood Donors ◽  
Mononuclear Cells ◽  
Aggregatibacter Actinomycetemcomitans ◽  
Cytokine Release ◽  
Peripheral Blood Mononuclear ◽  
Tnf Α ◽  
Blood Mononuclear Cells

Abstract Background: This study evaluated the effect of oral lactobacilli on the cytotoxicity and cytokine release from peripheral blood mononuclear cells (PBMC) when exposed to Aggregatibacter actinomycetemcomitans subtypes in vitro. The supernatants and cell wall extracts (CWEs) of eight A. actinomycetemcomitans strains, representing different subtypes, and three Lactobacillus strains were used. The PBMC cells from six blood donors were exposed to supernatants and CWEs of A. actinomycetemcomitans or Lactobacillus strains alone or combinations and untreated cells as control. The cytotoxicity was determined by trypan blue exclusion-method and IL-1β secretion by ELISA. TNF-α, IL-6 and IL-8 secretions were measured using Bioplex Multiplex Immunoassay. Results: Supernatants or CWEs from all bacterial strains showed cytotoxicity and IL-1β secretion and the subtypes of A. actinomycetemcomitans showed generally a significantly higher effect on PBMC´s than that of the Lactobacillus strains. Two highly toxic A. actinomycetemcomitans strains (JP2 and JP2-like) induced a higher response than all other strains. Two non-serotypable strains (NS1 and NS2) showed a weaker although significant effect than other A. actinomycetemcomitans or Lactobacillus strains tested. CWEs showed generally a higher effect on PBMC´s than the supernatants. When combined, Lactobacillus significantly reduced the toxicity and IL-1β secretion induced by A. acinomycetemcomitans. The effect varied between the subtypes and the reduction was highest for the JP2 and JP2-like strains. The Lactobacillus paracasei strain SD1 had a higher reducing effect that the other Lactobacillus strains. This strain had a consistent reducing effect on all subtypes of A. actinomycetemcomitans cytotoxicity, and release of IL-1β and TNF-α from PBMC´s of the blood donors. A strong and significant variation in cytokine release between the 6 blood donors was noticed. Conclusions: Lactobacillus spp and L. paracasei strain SD1 in particular, showed a significant reducing interaction with A. actinomycetemcomitans toxicity and release of cytokines in vitro.

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