Korean J Otorhinolaryngol-Head Neck Surg.
2012 Mar;55(3):155-160. 10.3342/kjorl-hns.2012.55.3.155.
The Relationship between Single Nucleotide Polymorphisms of the Carbonic Anhydrase 6 Gene andPhenylthiocarbamide Taste Sensitivity, Taste Disorder
- Affiliations
-
- 1Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, Korea.
- 2Korea Food Research Institute, Seongnam, Korea.
- 3Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Catholic University of Daegu, Daegu, Korea. miky@cu.ac.kr
- KMID: 2277334
- DOI: http://doi.org/10.3342/kjorl-hns.2012.55.3.155
Abstract
- BACKGROUND AND OBJECTIVES
The phenylthiocarbamide (PTC) and 6-n-propylthiouracil (PROP) taste sensitivity varies among individuals. Recently, it is reported that PROP taste responsiveness is associated with carbonic anhydrase 6 (CA6) gene polymorphism. The CA6 gene, a zinc metalloprotein in human saliva, is affected in taste function and might be correlated with gustatory diversity. The aim of this study was to examine whether PTC taste sensitivity and taste disorder is associated with the CA6 gene polymorphism rs2274327 (C/T), rs2274328 (A/C), and rs2274333 (A/G).
SUBJECTS AND METHOD
A total of 217 healthy normal subjects were recruited as controls, and 50 taste disorder patients were recruited as experimental group. The polymorphisms of CA6 gene were genotyped by polymerase chain reaction-restriction fragment length polymorphism analysis. All statistical analyses were calculated using the statistical package for the social science software. Haplotypes were estimated by Haploveiw and the PHASE programs.
RESULTS
The CA6 gene polymorphisms showed association with taste disorder but not with PTC sensitivity (taster/nontaster). The number of control subjects carrying AA genotype of single nucleotide polymorphism rs2274328 (A/C) in the CA6 gene was higher than the number of the subjects with taste disorder (p=0.048). However, there was no association between controls and taste disorder subjects in the haplotype analysis.
CONCLUSION
These data suggest that the CA6 gene polymorphism rs2274328 could affect taste function impairment in patients with taste disorder. This observation requires a further functional study of gustin protein to clarify the association of the CA6 gene polymorphisms with the taste disorder and sensitivity.
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