PubMed ID:
21775681
Public Release Type:
Journal
Publication Year: 2011
Affiliation: Department of Immunobiology, Yale University, New Haven, CT 06511, USA. kevan.herold@yale.edu
DOI:
https://doi.org/10.4049/jimmunol.1100539
Authors:
Gottlieb PA,
Asare A,
Becker DJ,
Bourcier K,
Dosch HM,
Gitelman SE,
Goland R,
Greenbaum CJ,
Herold KC,
Krause-Steinrauf H,
Krause-Steinrauf H,
Lachin JM,
Liu Z,
Marks JB,
McGee P,
McGee PF,
Moran AM,
Pescovitz,
Pescovitz MD,
Spain LM,
Type 1 Diabetes TrialNet Anti-CD20 Study Group
Studies:
TrialNet
Type 1 diabetes mellitus is believed to be due to the autoimmune destruction of β-cells by T lymphocytes, but a single course of rituximab, a monoclonal anti-CD20 B lymphocyte Ab, can attenuate C-peptide loss over the first year of disease. The effects of B cell depletion on disease-associated T cell responses have not been studied. We compare changes in lymphocyte subsets, T cell proliferative responses to disease-associated target Ags, and C-peptide levels of participants who did (responders) or did not (nonresponders) show signs of β-cell preservation 1 y after rituximab therapy in a placebo-controlled TrialNet trial. Rituximab decreased B lymphocyte levels after four weekly doses of mAb. T cell proliferative responses to diabetes-associated Ags were present at baseline in 75% of anti-CD20- and 82% of placebo-treated subjects and were not different over time. However, in rituximab-treated subjects with significant C-peptide preservation at 6 mo (58%), the proliferative responses to diabetes-associated total (p = 0.032), islet-specific (p = 0.048), and neuronal autoantigens (p = 0.005) increased over the 12-mo observation period. This relationship was not seen in placebo-treated patients. We conclude that in patients with type 1 diabetes mellitus, anti-B cell mAb causes increased proliferative responses to diabetes Ags and attenuated β-cell loss. The way in which these responses affect the disease course remains unknown.