Dissipative metabolic patterns respond during neutrophil transmembrane signaling.
Self-organization is a common theme in biology. One mechanism of self-organization is the creation of chemical patterns by the diffusion of chemical reactants and their nonlinear interactions. We have recently observed sustained unidirectional traveling chemical redox [NAD(P)H - NAD(P)(+)] waves within living polarized neutrophils. The present study shows that an intracellular metabolic wave responds to formyl peptide receptor agonists, but not antagonists, by splitting into two waves traveling in opposite directions along a cell's long axis. Similar effects were noted with other neutrophil-activating substances. Moreover, when cells were exposed to an N-formyl-methionyl-leucyl-phenylalanine (FMLP) gradient whose source was perpendicular to the cell's long axis, cell metabolism was locally perturbed with reorientation of the pattern in a direction perpendicular to the initial cellular axis. Thus, extracellular activating signals and the signals' spatial cues are translated into distinct intracellular dissipative structures.
Department of Biological Sciences, Wayne State University, Detroit, MI 48202, USA. hpetty@biology.biosci.wayne.edu
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D000936:Antigen-Antibody Complex / Q000502:physiology; D002634:Chemotaxis, Leukocyte / Q000502:physiology*; D006801:Humans; D007371:Interferon-gamma / Q000494:pharmacology; D015850:Interleukin-6 / Q000494:pharmacology; D016209:Interleukin-8 / Q000494:pharmacology; D007975:Leukotriene B4 / Q000494:pharmacology; D008024:Ligands; D008070:Lipopolysaccharides / Q000494:pharmacology; D009240:N-Formylmethionine Leucyl-Phenylalanine / Q000494:pharmacology; D009249:NADP / Q000378:metabolism; D009504:Neutrophils / Q000187:drug effects / Q000378:metabolism* / Q000502:physiology; D010972:Platelet Activating Factor / Q000494:pharmacology; D015398:Signal Transduction / Q000187:drug effects* / Q000502:physiology; D013050:Spectrometry, Fluorescence / Q000379:methods
D000936:Antigen-Antibody Complex; D015850:Interleukin-6; D016209:Interleukin-8; D008024:Ligands; D008070:Lipopolysaccharides; D010972:Platelet Activating Factor; D007975:Leukotriene B4; D009249:NADP; D009240:N-Formylmethionine Leucyl-Phenylalanine; D007371:Interferon-gamma