Pertussis toxin effects on chemoattractant-induced response heterogeneity in human PMNs utilizing Fluo-3 and flow cytometry.
Pertussis toxin effects on chemoattractant-induced response heterogeneity in human PMNs utilizing Fluo-3 and flow cytometry.
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利用 Fluo-3 和流式细胞术研究百日咳毒素对人类 PMN 中化学引诱剂诱导的反应异质性的影响。
DOI:
10.1002/cyto.990120308
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发表时间:
1991
期刊:
影响因子:
--
通讯作者:
Harter,JM
中科院分区:
文献类型:
--
作者:
Omann,GM;Harter,JM
Flow cytometric methods were utilized to determine N‐formylpeptide‐induced cytosolic calcium levels in human polymorphonuclear leukocytes (PMNs) detected with the calcium indicator Fluo‐3. Fluo‐3 was readily loaded into PMNs as the acetoxymethyl ester. At room temperature Fluo‐3 extrusion was minimal (<10%) over a 2 h time period. Flow cytometric histograms yielded symmetric distributions indicating homogeneous labelling of the cells. Stimulation of the cells with N‐formyl‐met‐leu‐phe (FMLP) caused homogeneous activation of all cells as indicated by a shift of the fluorescence distribution to higher fluorescence levels while still maintaining a symmetrical distribution. Resting values or FMLP‐induced cytosolic calcium levels were similar in cells loaded over a 20‐fold range of Fluo‐3‐acetoxymethyl ester. The effect of graded pertussis toxin (PT) treatment on the calcium response was determined by incubating cells with different concentrations of pertussis toxin for a time period that yielded a range of ADP ribosolation levels inside the cells. When these cells were activated with FMLP, the fluorescence histograms showed that pertussis toxin treatment resulted in a conversion of cells from responders to nonresponders. The responding cells responded with maximum calcium elevations similar to controls. This behavior may reflect heterogeneous insertion of the A‐protomer of PT or a very sharp threshold of coupled G‐proteins required to transduce the responses.
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影响因子:
4
作者:
A. Lückhoff
通讯作者:
A. Lückhoff
影响因子:
3.4
作者:
KONISHI, M;OLSON, A;BAYLOR, SM
通讯作者:
BAYLOR, SM
DOI:
--
发表时间:
1986
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Lazzari,KG;Proto,PJ;Simons,ER
通讯作者:
Simons,ER
DOI:
--
发表时间:
1989
期刊:
Cytometry
影响因子:
--
作者:
Marc Lopez;Daniel Olive;Patrice Mannoni
通讯作者:
Patrice Mannoni
影响因子:
--
作者:
Sklar,LA
通讯作者:
Sklar,LA