PMID- 20691696 OWN - NLM STAT- MEDLINE DCOM- 20101007 LR - 20171116 IS - 1872-7905 (Electronic) IS - 0022-1759 (Linking) VI - 361 IP - 1-2 DP - 2010 Sep 30 TI - Neutrophil activation during transmigration in vivo and in vitro A translational study using the skin chamber model. PG - 82-8 LID - 10.1016/j.jim.2010.07.015 [doi] AB - Neutrophil transmigration can be studied in vitro by use of the transwell model and in vivo by the skin chamber model. Activation during transmigration involves translocation of secretory vesicles and granules to the plasma- and phagolysosome membranes. In this study, we compared the skin chamber model with the transwell model, focusing on the mobilization of CR1 (CD35), CR3 (CD11b/CD18) and CD63 from intracellular vesicles and granules. In addition, functional responses towards a bacterial related stimulus, formyl-methionyl-leucyl-phenylalanine (fMLP), in terms of CR3 expression and production of reactive oxygen species (ROS) were assessed. Discrepancies between the skin chamber model and the transwell model were observed. The expression of CR1 increased following in vivo transmigration (p<0.001) and, in contrast, decreased following in vitro transmigration (p=0.004). Furthermore, CR1 was mobilized following an isolation procedure included in the transwell model. The expression of CR3 increased following both in vivo (p<0.001) and in vitro (p=0.03) transmigration. However, in vitro transmigration did not influence the fMLP induced CR3 expression which was significantly increased following in vivo transmigration (p=0.01). In addition, the fMLP induced production of ROS was significantly reduced following in vitro transmigration (p=0.002) but unaltered after in vivo transmigration, indicating differences between the impact of the two systems on cellular activation. The observed discrepancies between the two models might be partly explained by granule mobilization and neutrophil priming, induced during the isolation procedure included in the transwell model, which results in an altered cellular activation. Therefore, mobilization of granules needs to be accounted for when interpreting data from different model systems. CI - Copyright (c) 2010 Elsevier B.V. All rights reserved. FAU - Paulsson, Josefin M AU - Paulsson JM AD - Department of Clinical Immunology, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden. josefin.paulsson@ki.se FAU - Jacobson, Stefan H AU - Jacobson SH FAU - Lundahl, Joachim AU - Lundahl J LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20100805 PL - Netherlands TA - J Immunol Methods JT - Journal of immunological methods JID - 1305440 RN - 0 (Antigens, CD) RN - 0 (Antigens, CD1) RN - 0 (CD1b antigen) RN - 0 (CD63 protein, human) RN - 0 (Platelet Membrane Glycoproteins) RN - 0 (Reactive Oxygen Species) RN - 0 (Receptors, Complement 3b) RN - 0 (Tetraspanin 30) RN - 59880-97-6 (N-Formylmethionine Leucyl-Phenylalanine) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Antigens, CD/immunology MH - Antigens, CD1/immunology MH - Apoptosis/*immunology MH - Cell Movement/*immunology MH - Cytoplasmic Granules/*immunology/ultrastructure MH - Female MH - Flow Cytometry MH - Humans MH - Male MH - Microscopy, Electron, Transmission MH - Middle Aged MH - N-Formylmethionine Leucyl-Phenylalanine/pharmacology MH - Neutrophil Activation/*immunology MH - Neutrophils/*immunology/ultrastructure MH - Platelet Membrane Glycoproteins/immunology MH - Reactive Oxygen Species/immunology MH - Receptors, Complement 3b/immunology MH - Secretory Vesicles/*immunology/ultrastructure MH - Tetraspanin 30 MH - Young Adult EDAT- 2010/08/10 06:00 MHDA- 2010/10/12 06:00 CRDT- 2010/08/10 06:00 PHST- 2010/05/21 00:00 [received] PHST- 2010/07/07 00:00 [revised] PHST- 2010/07/29 00:00 [accepted] PHST- 2010/08/10 06:00 [entrez] PHST- 2010/08/10 06:00 [pubmed] PHST- 2010/10/12 06:00 [medline] AID - S0022-1759(10)00211-5 [pii] AID - 10.1016/j.jim.2010.07.015 [doi] PST - ppublish SO - J Immunol Methods. 2010 Sep 30;361(1-2):82-8. doi: 10.1016/j.jim.2010.07.015. Epub 2010 Aug 5.