Spatial transcriptomics and immunophenotyping uncover chronic inflammation-induced immune adaptations favoring dysplasia development in patients at risk of colitis-associated cancer - Summary - MDSpire
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Spatial transcriptomics and immunophenotyping uncover chronic inflammation-induced immune adaptations favoring dysplasia development in patients at risk of colitis-associated cancer
To determine chronic inflammation-induced immune cell reprogramming, particularly focusing on specific immune cell types, in IBD patients at risk for developing colitis-associated cancer (CAC).
Key Findings:
Histologically uninflamed colon from CAC patients showed upregulated metabolism and stress response pathways compared to SCRC patients, indicating a potential link to dysplasia.
Increased IL-10 expression was observed in lamina propria IgA+ plasma cells and CD163+ macrophages in CAC, suggesting a shift in immune response.
Downregulation of T cell recruitment and effector pathways was noted in CAC, with decreased CD8+ intraepithelial T cells (IELs), which may contribute to reduced immunosurveillance.
IBD patients who developed dysplasia had significantly lower levels of CD8+ IELs compared to those who did not, highlighting a potential biomarker for risk assessment.
Interpretation:
Chronic inflammation induces endogenous anti-inflammatory mechanisms that may limit inflammation but also reduce immunosurveillance, thereby promoting dysplasia and the development of CAC in IBD patients, suggesting avenues for targeted therapies.
Limitations:
The study focused on a limited number of patients, which may affect the generalizability of the findings.
Potential confounding factors related to treatment history, such as specific medications and duration of IBD, were not fully controlled, which could influence results.
Conclusion:
Chronic inflammation leads to immune adaptations that undermine immunosurveillance, potentially facilitating the development of dysplasia and CAC in IBD patients.
by Sofía Frigerio, Hina N Khan, Mojtaba Amini, Bregje Mol, Andra Neefjes-Borst, Manon E Wildenberg, Cyriel Y Ponsioen, Geert R D’Haens, Yvonne Vercoulen, Joep Grootjans
