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Macrophage-Stimulating 1 Polymorphism rs3197999 in Pediatric Patients with Inflammatory Bowel Disease
Jan Brylak1, Jan K Nowak1, Emilia Dybska1
1Department of Pediatric Gastroenterology and Metabolic Diseases, Poznan University of Medical Sciences, 60-572 Poznan, Poland.
Insights
The macrophage-stimulating 1 (MST1) rs3197999 polymorphism is linked to height Z-scores and C-reactive protein levels in pediatric inflammatory bowel disease (IBD). Further research is needed to explore genetic associations with IBD
Area of Science:
- Genetics and Genomics
- Pediatric Gastroenterology
- Inflammation and Immunology
Background:
- Inflammatory bowel disease (IBD), encompassing Crohn's disease (CD) and ulcerative colitis (UC), presents significant challenges in pediatric patients, often requiring extensive medical interventions.
- The macrophage-stimulating 1 (MST1) rs3197999 polymorphism has been implicated in IBD risk, but its specific clinical manifestations in pediatric populations require further elucidation.
- Understanding genetic influences on IBD clinical characteristics is crucial for personalized treatment strategies.
Purpose of the Study:
- To investigate the association between the MST1 rs3197999 genotype and various clinical parameters in children and adolescents diagnosed with IBD.
- To identify potential genotype-specific differences in disease activity, growth, and inflammatory markers.
- To contribute to a deeper understanding of the genetic underpinnings of IBD phenotypes in a pediatric cohort.
Main Methods:
- A multi-center cross-sectional study involving 367 pediatric patients with IBD (197 CD, 170 UC).
- Collection of clinical data including C-reactive protein (CRP), albumin, pediatric activity indices (PUCAI, PCDAI), anthropometric measurements, and treatment history.
- Genotyping for the MST1 rs3197999 polymorphism was performed using TaqMan hydrolysis probes.
Main Results:
- No significant associations were observed between MST1 genotypes and disease duration, age at biologic initiation, or hospitalization rates.
- A negative association was found between the CC genotype and height Z-score at the time of the worst disease flare (p = 0.016).
- The TT genotype was significantly associated with higher C-reactive protein levels at diagnosis (p = 0.023).
Conclusions:
- The MST1 rs3197999 polymorphism is associated with specific clinical characteristics in pediatric IBD, namely height Z-score and C-reactive protein levels.
- These findings highlight the potential role of MST1 in modulating disease phenotype in young IBD patients.
- Further research with comprehensive phenotyping is warranted to fully explore the complex interplay between genetics and the clinical course of IBD.
Abstract:
Background and Objectives: Inflammatory bowel disease (IBD), which includes Crohn's disease (CD) and ulcerative colitis (UC), often necessitates long-term treatment and hospitalizations and also may require surgery. The macrophage-stimulating 1 (MST1) rs3197999 polymorphism is strongly associated with the risk of IBD but its exact clinical correlates remain under investigation. We aimed to characterize the relationships between the MST1 rs3197999 genotype and the clinical characteristics in children and adolescents with IBD within a multi-center cross-sectional study. Materials and Methods: Clinical data included serum C-reactive protein (CRP), albumin, activity indices (PUCAI, PCDAI), anthropometric data, pharmacotherapy details, surgery, and disease severity. Genotyping for rs3197999 was carried out using TaqMan hydrolysis probes. Results: The study included 367 pediatric patients, 197 with Crohn's disease (CD) (40.6% female; a median age of 15.2 years [interquartile range 13.2-17.0]) and 170 with ulcerative colitis (UC) (45.8% female; a median age of 15.1 years [11.6-16.8]). No significant relationships were found between MST1 genotypes and age upon first biologic use, time from diagnosis to biological therapy introduction, PUCAI, PCDAI, or hospitalizations for IBD flares. However, in IBD, the height Z-score at the worst flare was negatively associated with the CC genotype (p = 0.016; CC: -0.4 [-1.2-0.4], CT: -0.1 [-0.7-0.8], TT: 0.0 [-1.2-0.7)]). The TT genotype was associated with higher C-reactive protein upon diagnosis (p = 0.023; CC: 4.3 mg/dL [0.7-21.8], CT 5.3 mg/dL [1.3-17.9], TT 12.2 mg/dL [3.0-32.9]). Conclusions: This study identified links between MST1 rs3197999 and the clinical characteristics of pediatric IBD: height Z-score and CRP. Further studies of the associations between genetics and the course of IBD are still warranted, with a focus on more extensive phenotyping.
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