McLeod phenotype is one of the rare blood cell types, defined as those that occur at a frequency of 1:1,000 or less. We have screened donors for rare cells since 1987 using mouse monoclonal antibodies (MAbs). In the western regions of Japan a total of 16,160,714 donor red cells were screened using mouse anti-Kell MAbs (anti-k, anti-Ku and anti-K14) during 1987–2005. We found 182 blood cells with McLeod phenotype or Kmod and 286 with Ko. To identify McLeod phenotype, we examine the expression level of Kell antigens by flow cytometry, cell morphology (acanthocytes) by scanning electron microscopy, red cells of family members and the XK gene. As a result, we identified three donors with McLeod phenotype (two subsequently developed McLeod syndrome) and two with McLeod-like phenotype. Nine donors are now registered as McLeod phenotype in all Japan. Show
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Rights and permissionsCopyright information© 2008 Springer-Verlag Berlin Heidelberg About this chapterCite this chapterTani, Y., Takahashi, J., Tanaka, M., Shibata, H. (2008). McLeod Syndrome: A Perspective from Japanese Blood Centers. In: Walker, R.H., Saiki, S., Danek, A. (eds) Neuroacanthocytosis Syndromes II. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-71693-8_11 Download citation
Which antigen is reduced in the McLeod phenotype?The absence of Kx antigen and reduction of Kell antigen is known as the "McLeod phenotype," and refers only to the red blood cells.
Which phenotype can produce anti Jk3?Immunized individuals with the Jk(a-b-) phenotype may produce anti-Jk3.
Which among these diseases is commonly associated with the McLeod phenotype?The contiguous gene deletion syndrome is known to associate the Kell phenotype/McLeod syndrome with diseases such as X-linked chronic granulomatous disease, Duchenne muscular dystrophy, and X-linked retinitis pigmentosa.
How do you get antiIt is produced only after exposure to the antigen as a result of pregnancy or repeated blood transfusions and thus the anti-K antibody is seen frequently in individuals.
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