Predicting (side) effects for patients with inflammatory bowel disease: The promise of pharmacogenetics

Figure 1 Example of an automated computational pipeline that creates an individual pharmacogenetic passport based on an individual’s genotype. In this case, the individual is a heterozygous carrier of the loss-of-function TPMT*3A allele and homozygous carrier of the NUDT15*1 allele. Heterozygous carriers of TPMT*3A are at risk for thiopurine-induced myelosuppression due to intermediate TPMT enzyme activity levels. Hence, a reduced dose (30%-80% of target dose) is strongly recommended. Patients with a NUDT15*1/*1 genotype are considered as NUDT15 normal metabolizers[28]. TPMT: Thiopurine S-methyltransferase; NUDT: Nudix hydrolase.