Table 1 TYMS combined genotypes classified according to expected expression of thymidylate synthase

From: Predictors of survival and toxicity in patients on adjuvant therapy with 5-fluorouracil for colorectal cancer

 

Expression level

TYMS 5′UTR

TYMS 3′UTR

n

G>C SNP (Kawakami and Watanabe, 2003)

High

2R/3RG,3RC/3RG, 3RG/3RG

58

 

Low

2R/2R, 2R/3RC, 3RC/3RC

72

Combination A (Hitre et al, 2005)

High

3R3R

Any genotype

61

  

2R3R

ins/ins

 
 

Low

2R3R

ins/del–del/del

69

  

2R2R

any genotype

 
 

High

2R/3RG,3RC/3RG, 3RG/3RG

ins/ins

8

Combination B

Intermediate

2R/3RG,3RC/3RG, 3RG/3RG

ins/del–del/del

88

  

2R/2R, 2R/3RC, 3RC/3RC

ins/ins

 
 

Low

2R/2R, 2R/3RC, 3RC/3RC

ins/del–del/del

34

  1. Abbreviations: SNP=single nucleotide polymorphism; UTR=untranslated region.