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- W1988697665 abstract "ABSTRACT: Membrane properties associated with chemoattractant-mediated cellular responsiveness of neonatal polymorphonuclear leukocytes (PMN) were analyzed using n-formylmethionyl-leucyl-phenylalanine. Inasmuch as aliphatic alcohols as a membrane fluidizer can enhance the chemoattractant binding and affect subsequent cellular responsiveness in adult PMN, neonatal PMN were studied for such properties by their treatment with iso-propyl alcohol, an aliphatic alcohol. The alcohol (<2.5%) treatment enhanced the N-formylmethionyl-leucyl-phenylalanine binding to adult PMN, but there were no changes in the N-formylmethionyl-leucyl-phenylalanine binding to neonatal PMN. Although the N-formylmethionyl-leucyl-phenylalanine-induced subsequent responsiveness including migration, lysosomal enzyme release and superoxide anion production were modulated by the alcohol treatment in adult PMN, there was no such modulation in neonatal PMN. Because membrane fluidity is largely involved in the regulation of the receptor functions, the membrane fluidity of neonatal PMN was next measured by an excimer-forming lipid technique in flow cytometry. The membrane fluidity value (0.45 ± 0.037) of neonatal PMN was lower than that (0.74 ± 0.072) of adult PMN (p < 0.01). Although the aliphatic alcohol enhanced the membrane fluidity of adult PMN, it did not affect the membrane fluidity of neonatal PMN. We conclude that there is abnormal membrane fluidity as a cause of impaired functional dynamics of the chemoattractant receptors, which appears to underlie the defective modulation of cell functions by the membrane fluidizer in neonatal PMN." @default.
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- W1988697665 date "1988-10-01" @default.
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- W1988697665 title "Abnormal Membrane Fluidity as a Cause of Impaired Functional Dynamics of Chemoattractant Receptors on Neonatal Polymorphonuclear Leukocytes: Lack of Modulation of the Receptors by a Membrane Fluidizer" @default.
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- W1988697665 doi "https://doi.org/10.1203/00006450-198810000-00005" @default.
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