Study on Membrane Fluidity of Liver Peroxisomes

  • H. Hayashi
  • K. Nakata
  • F. Hashimoto
Part of the Proceedings in Life Sciences book series (LIFE SCIENCES)


The membrane fluidity of liver peroxisomes from normal and clofibrate-treated rats was investigated by using a fluorescence probe, 1-anilinonaphthalene-8-sulfonate (ANS). The excitation maximum of the probe was changed from 347 nm to 380 nm and the emission maximum from 493 nm to 463 nm in the presence of peroxisomes, and fluorescence intensity was enhanced more than 50 times. These results suggest that ANS was bound to the peroxisomal membrane. Fluorescence depolarization (P-value) was determined with such ANS- labeled peroxisomes. The P-values of peroxisomes from both normal and clofibrate-treated gradually decreased with increasing temperature, but that of clofibrate-treated peroxisomes was always smaller than that of normal peroxisomes. P-values were observed at 37° C for 60 min. The average P-value of normal peroxisomes was 0.270, while that of clofibrate-treated peroxisomes was 0.248. These results indicate that the membrane fluidity of liver peroxisomes is increased by the treatment with clofibrate. treatment of rats with another inducer of liver peroxisome proliferaton, di (2- ethylhexyl)phthalate, had an effect similar to that of clofibrate. However, alloxan treated (diabetic) rats showed no change of peroxisomal membrane fluidity.


Membrane Fluidity Quinine Sulfate Peroxisomal Membrane Fluorescence Depolarization Liver Peroxisome 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1987

Authors and Affiliations

  • H. Hayashi
    • 1
  • K. Nakata
    • 1
  • F. Hashimoto
    • 1
  1. 1.Department of Physiological ChemistryJosai UniversitySakado, SaitamaJapan

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