Authors: Emmanuel Bissé Nathalie Zorn Sabine PreislerAdams Thomas Epting Olaf Sommer Christine Schaeffer Alain Van Dorsselaer Jürgen Horst Heinrich Wieland
Publish Date: 2008/03/26
Volume: 87, Issue: 6, Pages: 463-466
Abstract
Inclusion bodies associated with Hb Hokusetsu have never been published We investigated the autoxidation of this variant as a cause for the inclusion bodies in three unrelated families Moreover haplotype analysis was carried out to unravel the origin of this variant also found in the Japanese population The presence of inclusion bodies was revealed by incubating the fresh peripheral blood with brilliant cresyl blue We further characterised this variant using mass spectrometry and DNA analysis The generation of superoxide radical ROS during the autoxidation was assayed by electron spin resonance spectrometry Inclusion bodies were seen in about 25 of red cells Hb Hokusetsu turned out to be less thermostable than the control It showed a tenfoldenhanced ROS formation versus control The analysis of the βglobin haplotypes for the three unrelated families showed that Hb Hokosetsu was linked with haplotype I 5′ + − − − − + + 3′ This is the first case published in the German population The inclusion bodies could be due to the instability of the variant This is supported by the increased autoxidation The absence of anaemia evokes an elimination of the inclusion bodies by the proteolytic mechanism of the red cells The association of the variant in three unrelated families with the five polymorphisms of haplotype I indicates a single common mutation event In the presence of Hb Hokusetsu HbA 1C standard methods used to assess glycaemic control are mistaken
Keywords: