PMID- 8978459 OWN - NLM STAT- MEDLINE DCOM- 19970317 LR - 20181003 IS - 0730-2312 (Print) IS - 0730-2312 (Linking) VI - 63 IP - 4 DP - 1996 Dec 15 TI - Fluid shear stress induces actin polymerization in human neutrophils. PG - 432-41 AB - We have previously reported that a physiological range of shear stress induces neutrophil homotypic aggregation mediated by lymphocyte function-associated antigen-1 (LFA-1) and intercellular adhesion molecule-3 (ICAM-3) interactions. To further characterized the homotypic aggregation, actin polymerization was investigated in neutrophils stimulated by shear stress in comparison with formyl-methionyl-leucyl-phenylalanine (fMLP). In fMLP-stimulated neutrophils, actin polymerization was localized in the pseudopods, and this reaction was not mediated by a cytosolic level of Ca2+. In contrast to fMLP stimulation, the actin polymerization induced by shear stress in a cone-plate viscometer was localized in cell-cell contact regions, and this polymerization required the increase of intracellular Ca2+. This shear stress-induced actin polymerization was not observed when neutrophils were pretreated with anti-LFA-1 or anti-ICAM-3 antibody. In conclusion, LFA-1 and ICAM-3 interaction mediated by the increase of [Ca2+]i generated the intercellular signal in order to accumulate F-actin in the cell-cell contact regions. FAU - Okuyama, M AU - Okuyama M AD - Department of Surgery II, Osaka University Medical School, Japan. FAU - Ohta, Y AU - Ohta Y FAU - Kambayashi, J AU - Kambayashi J FAU - Monden, M AU - Monden M LA - eng PT - Comparative Study PT - Journal Article PL - United States TA - J Cell Biochem JT - Journal of cellular biochemistry JID - 8205768 RN - 0 (Actins) RN - 0 (Antibodies, Blocking) RN - 0 (Antigens, CD) RN - 0 (Antigens, Differentiation) RN - 0 (Cell Adhesion Molecules) RN - 0 (ICAM3 protein, human) RN - 0 (Lymphocyte Function-Associated Antigen-1) RN - 0 (Polymers) RN - 59880-97-6 (N-Formylmethionine Leucyl-Phenylalanine) RN - SY7Q814VUP (Calcium) SB - IM MH - Actins/drug effects/*metabolism MH - Antibodies, Blocking/immunology MH - *Antigens, CD MH - *Antigens, Differentiation MH - Calcium/metabolism MH - Cell Adhesion Molecules/immunology MH - Cytosol/metabolism MH - Humans MH - Lymphocyte Function-Associated Antigen-1/immunology MH - Microscopy, Confocal MH - N-Formylmethionine Leucyl-Phenylalanine/pharmacology MH - Neutrophil Activation MH - Neutrophils/drug effects/*metabolism/physiology MH - Polymers/*metabolism MH - Pseudopodia/metabolism MH - Signal Transduction MH - Stress, Mechanical EDAT- 1996/12/15 00:00 MHDA- 2000/06/20 09:00 CRDT- 1996/12/15 00:00 PHST- 1996/12/15 00:00 [pubmed] PHST- 2000/06/20 09:00 [medline] PHST- 1996/12/15 00:00 [entrez] AID - 10.1002/(SICI)1097-4644(19961215)63:4<432::AID-JCB5>3.0.CO;2-U [pii] AID - 10.1002/(SICI)1097-4644(19961215)63:4%3C432::AID-JCB5%3E3.0.CO;2-U [doi] PST - ppublish SO - J Cell Biochem. 1996 Dec 15;63(4):432-41. doi: 10.1002/(SICI)1097-4644(19961215)63:4%3C432::AID-JCB5%3E3.0.CO;2-U.