Table 3.
Allele-specific NLRC4 isoform expression in relation to the rs385076 genotype.
Association between mRNA (deltaCt) and rs385076 T alleles | Association between mRNA (deltaCt) and log(IL-18) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Isoforms | Description | delta Ct | Beta | SE | P | N | Beta | SE | P | N |
2, 4 | Including exon 2 | 5.1±1.4 | 0.305 | 0.047 | 2.0×10−10 | 1,175 | 0.009 | 0.008 | 0.254 | 1,459 |
1, 3 | Excluding exon 2 | 5.2±0.8 | −0.103 | 0.030 | 7.4×10−4 | 1,171 | 0.027 | 0.014 | 0.049 | 1,438 |
1, 2, 3, 4 | Total NLRC4 mRNA | 3.2±1.3 | 0.134 | 0.050 | 6.9×10−3 | 1,180 | 0.014 | 0.008 | 0.092 | 1,467 |
Expression levels of mRNA are represented as deltaCt values (deltaCt(transcript) = Ct(transcript) – Ct(GAPDH)), which are normalized for the housekeeping gene GAPDH. Beta estimates were calculated in a linear mixed model and refer to the change in deltaCt for each T allele of rs385076 and the change in log(IL-18), respectively. Therefore, a negative beta implies an increase in gene expression. N refers to the number of individuals with non-missing values used for a test.