Cellular augmentation of polymorphonuclear leukocyte chemotaxis

1979 ◽  
Vol 236 (1) ◽  
pp. C22-C29 ◽  
Author(s):  
A. Takeuchi ◽  
R. H. Persellin
Keyword(s):  
Polymorphonuclear Leukocyte ◽  
Polymorphonuclear Leukocytes ◽  
Cellular Response ◽  
Active Component ◽  
Cell Contact ◽  
Cytoplasmic Fraction ◽  
Activated Neutrophils ◽  
Leukocyte Chemotaxis ◽  
Number Of Cells ◽  
Insufficient Number

The density of neutrophils influences the number of cells that will respond to a chemoattractant, endotoxin-activated serium. When fewer than 3 x 10(5) polymorphonuclear leukocytes (PMN) were placed in the top compartment of a modified Boyden chemotaxis chamber, the cellular response was weak. Complete membrane penetration by activated neutrophils rarely was observed. When this number of PMN was exceeded, however, both the number of cells and the percentage of neutrophils responding to the leukoattractant increased. The density of cells required for effective chemotactic response to occur was such that intimate cell-to-cell contact was suggested. This indicated that PMN exerted a kinetic influence upon one another. Extracts of disrupted PMN induced an otherwise insufficient number of neutrophils to respond to the chemotactic stimulus. The active component was isolated in the cytoplasmic fraction (postcentrifugation, 100,000 x g, 60 min) of PMN, but was not present in other subcellular fractions. This cytoplasmic augmentor of chemotaxis (CACh) increased random mobility of neutrophils, but was not, itself, a chemotactic factor. These findings suggest that PMN cooperate in their response to a leukotactic stimulus.

Effect of Some Anti-Inflammatory Drugs on Human Neutrophil Chemotaxis

1994 ◽  
Vol 22 (2) ◽  
pp. 100-106 ◽  
Author(s):  
G Hasçelik ◽  
B ŞLener ◽  
Z Hasçelik
Keyword(s):  
Acetylsalicylic Acid ◽  
Polymorphonuclear Leukocyte ◽  
Polymorphonuclear Leukocytes ◽  
Diclofenac Sodium ◽  
Tiaprofenic Acid ◽  
Boyden Chamber ◽  
Random Migration ◽  
Leukocyte Chemotaxis ◽  
Inflammatory Drugs ◽  
Anti Inflammatory

The effects of piroxicam, tenoxicam, diclofenac sodium, acetylsalicylic acid and tiaprofenic acid on the chemotaxis and random migration of human polymorphonuclear leukocytes were investigated, using zymosan-activated serum as chemo-attractant, with a modified Boyden chamber technique. All five compounds significantly reduced chemotaxis. The random migration of polymorphonuclear leukocytes was inhibited by piroxicam, diclofenac sodium and tiaprofenic acid but not by tenoxicam or acetylsalicylic acid. The inhibitory effect of these non-steroidal anti-inflammatory drugs on polymorphonuclear leukocyte chemotaxis and on random migration was generally dose-dependent. The results suggest that the drugs studied may have a direct effect on polymorphonuclear leukocyte chemotaxis and that this activity may contribute to their anti-inflammatory properties.

scholarly journals Cell polarity: an examination of its behavioral expression and its consequences for polymorphonuclear leukocyte chemotaxis.

1981 ◽  
Vol 89 (3) ◽  
pp. 585-592 ◽  
Author(s):  
S H Zigmond ◽  
H I Levitsky ◽  
B J Kreel
Keyword(s):  
Cell Polarity ◽  
Polymorphonuclear Leukocyte ◽  
Polymorphonuclear Leukocytes ◽  
Asymmetric Distribution ◽  
Behavioral Expression ◽  
Morphological Polarity ◽  
Chemotactic Factors ◽  
Leukocyte Chemotaxis ◽  
Chemotactic Ability ◽  
Chemotactic Gradient

Locomoting polymorphonuclear leukocytes (PMNs) exhibit a morphological polarity. We demonstrate that they also exhibit a behavioral polarity in their responsiveness to chemotactic factor stimulation. This is demonstrated by (a) the pattern of their locomotion in a homogeneous concentration of chemotactic factors, (b) their responses to increases in the homogeneous concentration of chemotactic factors, and (c) their responses to changes in the direction of a chemotactic gradient. The behavioral polarity is not a function of the rate of locomotion of the particular stimulant used to orient the cells, but may reflect an asymmetric distribution of chemotactic receptors or the motile machinery. The polar behavior affects the chemotactic ability of PMNs. The data are discussed in relation to possible mechanisms of sensing a chemotactic gradient.

An Inverse Relation Between Cell Density and the Number of Microvilli in Cultures of BHK 21 Hamster Fibroblasts

1970 ◽  
Vol 7 (3) ◽  
pp. 695-709
Author(s):  
C. H. O'NEILL ◽  
E. A. C. FOLLETT
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Monolayer Culture ◽  
Cell Contact ◽  
Inverse Relation ◽  
Culture Density ◽  
Microscope Technique ◽  
The Relationship ◽  
Number Of Cells ◽  
Scanning Electron

The relationship between culture density and the number of microvilli on the cell surface has been studied using BHK21 cells in established monolayer culture. The number of microvilli can be estimated quantitatively by a scanning electron-microscope technique. It can be increased by applying specific antiserum, but whether antibody is applied or not a significant number of cells regularly bear microvilli. This number is characteristic of the culture density. In sparse cultures above a certain minimum density it is relatively high, and in confluent cultures it is much reduced. These results indicate that microvilli may be inhibited by cell contact.

Effects of Erythromycin, Josamycin and Spiramycin on Rat Polymorphonuclear Leukocyte Chemotaxis

Chemotherapy ◽  
1986 ◽  
Vol 32 (4) ◽  
pp. 379-382 ◽  
Author(s):  
A. Eyraud ◽  
J. Descotes ◽  
J.Y. Lombard ◽  
A. Laschi-Loquerie ◽  
P. Tachon ◽  
...  
Keyword(s):  
Polymorphonuclear Leukocyte ◽  
Leukocyte Chemotaxis

scholarly journals Intracellular localization of Rickettsia tsutsugamushi in polymorphonuclear leukocytes.

1979 ◽  
Vol 150 (3) ◽  
pp. 703-708 ◽  
Author(s):  
Y Rikihisa ◽  
S Ito
Keyword(s):  
Guinea Pig ◽  
Cell Cultures ◽  
Polymorphonuclear Leukocyte ◽  
Polymorphonuclear Leukocytes ◽  
Intracellular Localization ◽  
The Other ◽  
Cytoplasmic Organelles

Rickettsia tsutsugamushi (Gilliam strain) was serially propagated in BHK-21 cell cultures and incubated with guinea pig peritoneal polymorphonuclear leukocytes to study the ultrastructural features of rickettsial uptake and entry into the leukocytes. Significant numbers of rickettsiae were phagocytized selectively by these leukocytes within 30 min. About one-half of these rickettsiae remained sequestered in phagosomes but the other one-half were free from the phagosome and localized directly in the polymorphonuclear leukocyte cytoplasm. Various stages of rickettsial release from the phagosomes were observed. Once free within the polymorphonuclear leukocyte cytoplasm, the rickettsiae were preferentially localized in the glycogen-packed areas which are devoid of lysosomes and other cytoplasmic organelles. This study indicates that rickettsiae phagocytized by polymorphonuclear leukocytes can escape from the phagosome into the cytoplasm.

scholarly journals Effect of Nedocromil Sodium on Polymorphonuclear Leukocyte Plasma Membrane

1994 ◽  
Vol 3 (7) ◽  
pp. S21-S24 ◽  
Author(s):  
A. Kantar ◽  
N. Oggiano ◽  
P. L. Giorgi ◽  
G. V. Coppa ◽  
R. Gabbianelli ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Steady State ◽  
Membrane Fluidity ◽  
Fluorescence Anisotropy ◽  
Polymorphonuclear Leukocyte ◽  
Polymorphonuclear Leukocytes ◽  
Plasma Membranes ◽  
Nedocromil Sodium ◽  
Plasma Membrane Fluidity ◽  
Steady State Fluorescence

The effect of nedocromil sodium on the plasma membrane fluidity of polymorphonuclear leukocytes (PMNs) was investigated by measuring steady-state fluorescence anisotropy of 1-[4-trimethylammonium-phenyl]-6-phenyl- 1,3,5-hexatriene (TMA-DPH) incorporated in the membrane. Our results show that nedocromil sodium 300 μM significantly decreased membrane fluidity of PMNs. The decrease in membrane fluidity of PMNs induced by fMLP was abolished in the presence of nedocromil sodium. These data suggest that nedocromil sodium interferes with the plasma membranes of PMNs and modulates their activities.

scholarly journals Endothelial-secreted arachidonic acid metabolites modulate polymorphonuclear leukocyte chemotaxis and diapedesis in vitro

Blood ◽  
1988 ◽  
Vol 71 (3) ◽  
pp. 771-779 ◽  
Author(s):  
J Doukas ◽  
HB Hechtman ◽  
D Shepro
Keyword(s):  
Arachidonic Acid ◽  
Polymorphonuclear Leukocyte ◽  
Thromboxane A2 ◽  
In Vitro Assays ◽  
General Effect ◽  
Random Motility ◽  
Acid Metabolites ◽  
Leukocyte Chemotaxis ◽  
High Doses

Abstract The influence of endothelial cells (ECs) on polymorphonuclear leukocyte (PMN) motility was examined using in vitro assays of PMN diapedesis and chemotaxis. ECs are seen to release arachidonic acid (20:4) metabolites that directly increase or decrease PMN movement, with their general effect being enhanced motility. This effect can be increased or decreased by treating ECs with stimulators or inhibitors of 20:4 metabolism, respectively. The metabolites include thromboxane B2, which increases PMN random motility, chemotaxis, and diapedesis in a dose- responsive manner and which acts as a chemoattractant; 6-keto-PGF1 alpha, which increases chemotaxis and diapedesis at high doses but decreases these responses at low doses; and a lipoxygenase-derived metabolite, suggested to be 5-hydroxyeicosatetraenoic acid, which increases chemotaxis and diapedesis. Thromboxane A2 and prostacyclin mimetics also affect chemotaxis in qualitatively similar manners as TxB2 and 6-keto-PGF1 alpha, respectively, but display greater potency. EC release of these metabolites is also seen to be substratum modulated, with an increased production by cells cultured on extracellular matrices. These results suggest that ECs are capable of modulating PMN motility and suggest a role for ECs in the control of PMN diapedesis.

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