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JCI Insight. 2019 Feb 21;4(4). pii: 125556. doi: 10.1172/jci.insight.125556. eCollection 2019 Feb 21.

Cell type-specific immune phenotypes predict loss of insulin secretion in new-onset type 1 diabetes.

Author information

1
Systems Immunology Program and.
2
Diabetes Clinical Research Program, Benaroya Research Institute at Virginia Mason, Seattle, Washington, USA.

Abstract

The rate of decline in insulin secretion after diagnosis with type 1 diabetes (T1D) varies substantially among individuals and with age at diagnosis, but the mechanism(s) behind this heterogeneity are not well understood. We investigated the loss of pancreatic β cell function in new-onset T1D subjects using unbiased whole blood RNA-seq and verified key findings by targeted cell count measurements. We found that patients who lost insulin secretion more rapidly had immune phenotypes ("immunotypes") characterized by higher levels of B cells and lower levels of neutrophils, especially neutrophils expressing primary granule genes. The B cell and neutrophil immunotypes showed strong age dependence, with B cell levels in particular predicting rate of progression in young subjects only. This age relationship suggested that therapy targeting B cells in T1D would be most effective in young subjects with high pretreatment B cell levels, a prediction which was supported by data from a clinical trial of rituximab in new-onset subjects. These findings demonstrate a link between age-related immunotypes and disease outcome in new-onset T1D. Furthermore, our data suggest that greater success could be achieved by targeted use of immunomodulatory therapy in specific T1D populations defined by age and immune characteristics.

KEYWORDS:

Autoimmunity; Bioinformatics; Diabetes; Immunotherapy

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