The Effect of Beta‐Lipoprotein on Antistreptolysin‐O Antibody Titers

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  • BABA Toru
    Department of Dermatology, Yokohama City University School of Medicine, Yokohama, Virology Division, National Cancer Center Research Institute Department of Clinical Laboratory, Yokohama Citizen's Hospital Department of Orthopedic Surgery, Faculty of Medicine, University of Tokyo Department of Pediatrics, University of Colorado School of Medicine Department of Surgery, University of Colorado Medical Center Department of Dermatology, St. Marianna University, School of Medicine
  • SUZUKI Mitsuru
    Department of Dermatology, Yokohama City University School of Medicine, Yokohama, Virology Division, National Cancer Center Research Institute Department of Clinical Laboratory, Yokohama Citizen's Hospital Department of Orthopedic Surgery, Faculty of Medicine, University of Tokyo Department of Pediatrics, University of Colorado School of Medicine Department of Surgery, University of Colorado Medical Center
  • SONOZAKI Hidekichi
    Department of Dermatology, Yokohama City University School of Medicine, Yokohama, Virology Division, National Cancer Center Research Institute Department of Clinical Laboratory, Yokohama Citizen's Hospital Department of Orthopedic Surgery, Faculty of Medicine, University of Tokyo Department of Pediatrics, University of Colorado School of Medicine Department of Surgery, University of Colorado Medical Center
  • SCHRÖTER Gerhard
    Department of Dermatology, Yokohama City University School of Medicine, Yokohama, Virology Division, National Cancer Center Research Institute Department of Clinical Laboratory, Yokohama Citizen's Hospital Department of Orthopedic Surgery, Faculty of Medicine, University of Tokyo Department of Pediatrics, University of Colorado School of Medicine Department of Surgery, University of Colorado Medical Center
  • TORISU Motomichi
    Department of Dermatology, Yokohama City University School of Medicine, Yokohama, Virology Division, National Cancer Center Research Institute Department of Clinical Laboratory, Yokohama Citizen's Hospital Department of Orthopedic Surgery, Faculty of Medicine, University of Tokyo Department of Pediatrics, University of Colorado School of Medicine Department of Surgery, University of Colorado Medical Center The First Department of Surgery, School of Medicine, Kyushu University

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  • The Effect of Beta-Lipoprotein on Antistreptolysin-O Antibody Titers

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The relationship between antistreptolysin-O (ASLO) titers and β-lipoprotein were examined The following results were obtained. 1. Fifty-three children with unmeasurably low ASLO titers had variable β-lipoprotein concentrations which were within normal ranges. 2. Streptococcal infections in the children correlated well with the elevation of ASLO titers, but β-lipoprotein concentration in these sera did not show any correlation with the behavior of ASLO titers. 3. From the Sephadex G 200 gel filtration chromatographical study, no ASLO activities were found in the fraction containing β-lipoprotein except in some special cases that had the IgM ASLO antibody. 4. The inhibitory effect of β-lipoprotein upon hemolysis by streptolysin-O was incomplete and its effect decreased with a pro longed incubation time. 5. The partially purified β-lipoprotein had no effect upon the hemolytic activity of streptolysin-O, when the ASLO titers were measured by the method of 100% inhibition cf hemolysis. From these observations, it was concluded that the ASLO antibody titers were truly relate to streptococcal infection and not influenced by the presence of β-lipoprotein if the ASLO titers wer measured by the 100% inhibition of hemolysis.

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