Research Article

Interaction Effects of Season of Birth and Cytokine Genes on Schizotypal Traits in the General Population

Table 2

Genotyping conditions for the IL1B rs16944, IL4 rs2243250, and IL-1RN VNTR polymorphisms.

PolymorphismPrimerPCR reaction mixture and programRestriction endonucleasePCR or digestion products

IL1B
 rs16944
Forward
5′TGGCATTGATCTGGTTCATC3′ 
 reverse
5′GTTTAGGAATCTTCCCACTT3′
94°C/2 min
30 cycles:
94°C/20 s
50°C/20 s
72°C/20 s
72°C/4 min
Ama87I
(SybEnzym, Russia)
Digested
C allele,
190 +
115 bp,
nondigested
T allele,
305 bp

IL4
 rs2243250
Forward
5′ACTAGGCCTCACCTGATACG3′ 
 reverse
5′GTTGTAATGCAGTCCTCCTG3′
94°C/2 min
30 cycles:
94°C/30 s
50°C/30 s
72°C/30 s
72°C/4 min
BslFI
(SybEnzym, Russia)
Digested C allele,
177 +
18 bp,
nondigested
T allele, 195 bp

IL-1RN
 VNTR
Forward
5′-CTCAGCAACACTCCTAT-3′ 
 reverse
5′-TCCTGGTCTGCAGGTAA3′
94°C/2 min
30 cycles:
94°C/20 s
50°C/20 s
72°C/20 s
72°C/4 min
-Allele 1,
412 bp,
allele 2,
240 bp,
allele 3,
498 bp,
allele 4,
326 bp,
allele 5,
584 bp