The anionic amphiphile SDS is an antagonist for the human neutrophil formyl peptide receptor 1.

Bergh Thorén, Fredrik,1976Gothenburg University,Göteborgs universitet,Institutionen för biomedicin, avdelningen för infektionssjukdomar,Institute of Biomedicine, Department of Infectious Medicine (författare)

The anionic amphiphil sodium dodecyl sulfate (SDS) is commonly used to activate the superoxide-generating NADPH-oxidase complex in cell-free systems, but very little is known about the effects of SDS on intact cells. It was, however, recently shown that SDS causes a translocation and an activation of Rac (a small G-protein) in intact cells, but this signal is not in its own sufficient to activate the oxidase (Nigorikawa et al. (2004) [1]). We found that SDS acted as an antagonist for FPR1, one of the neutrophil members of the formyl peptide receptor family. Accordingly, SDS reduced superoxide anion production induced by the chemoattractant formylmethionyl-leucyl-phenylalanine (fMLF). The receptor specificity of SDS was fairly high, but the concentration range in which it worked was narrow. The length of the carbohydrate chain as well as the charge of the molecule was of importance for the antagonistic effects. Signaling through FPR2, a closely related receptor also expressed in neutrophils, was not inhibited by SDS. On the contrary, the response induced by the FPR2-specific agonist WKYMVM was primed by SDS. The precise mechanism behind the primed state is not known, but might be related to the effects earlier described for SDS on the small G-protein Rac, that is of importance for a proper transduction of the down-stream signals from the occupied receptor.

MEDICIN OCH HÄLSOVETENSKAP Medicinska och farmaceutiska grundvetenskaper Immunologi inom det medicinska området hsv//swe
MEDICAL AND HEALTH SCIENCES Basic Medicine Immunology in the medical area hsv//eng
Anions
Dose-Response Relationship
Drug
Humans
Neutrophil Activation
drug effects
physiology
Neutrophils
drug effects
metabolism
Protein Binding
drug effects
physiology
Receptors
Formyl Peptide
antagonists & inhibitors
metabolism
Sodium Dodecyl Sulfate
chemistry
pharmacology

Karlsson, Jennie,1979Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för reumatologi och inflammationsforskning,Institute of Medicine, Department of Rheumatology and Inflammation Research(Swepub:gu)xkajen (författare)
Dahlgren, Claes,1949Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för reumatologi och inflammationsforskning,Institute of Medicine, Department of Rheumatology and Inflammation Research(Swepub:gu)xdahcl (författare)
Forsman, HuameiGothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för reumatologi och inflammationsforskning,Institute of Medicine, Department of Rheumatology and Inflammation Research(Swepub:gu)xfuhuv (författare)
Göteborgs universitetInstitutionen för biomedicin, avdelningen för infektionssjukdomar (creator_code:org_t)

Av författaren/redakt...: Bergh Thorén, Fr ...; Karlsson, Jennie ...; Dahlgren, Claes, ...; Forsman, Huamei

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