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. 1991 Sep;32(3):289–293. doi: 10.1111/j.1365-2125.1991.tb03901.x

N-acetylation phenotyping using dapsone in a Jordanian population.

Y M Irshaid 1, H F al-Hadidi 1, M A Abuirjeie 1, N M Rawashdeh 1
PMCID: PMC1368520  PMID: 1777365

Abstract

1. The N-acetylation of dapsone (DDS) was studied in 160 unrelated healthy Jordanian volunteers. 2. The frequency of slow acetylators determined using the plasma monoacetyldapsone (MADDS) to DDS ratio (MADDS/DDS), was 67.5% with a 95% confidence interval of 59 to 76%. Slow acetylators had an acetylation ratio of less than 0.42. 3. Applying the Hardy-Weinberg Law, the frequency of the recessive allele controlling slow acetylation was found to be 0.82 +/- 0.02. 4. The frequency distribution histogram of the plasma MADDS/DDS ratio showed an apparent trimodal pattern. The number of homozygous (n = 16) and heterozygous (n = 36) rapid acetylators derived from the observed data did not agree with those predicted for the respective rapid acetylators (n = 5 and n = 47) according to the Hardy-Weinberg Law. The suggested antimode used to discriminate the two groups was 0.82. 5. The mean plasma concentration of MADDS and the mean plasma acetylation ratio were about three times lower in slow than in rapid acetylators. However, there was no difference in mean plasma DDS concentration between slow and rapid acetylators. 6. There was a significant correlation (r = 0.853, P less than 0.001) between plasma MADDS concentration and the acetylation ratio. For DDS such a correlation was absent (r = 0.059, P = 0.23).

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Selected References

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