Trending Now - Immune Checkpoint Mutations Drive Evolution in Autoimmunity

WHO:

Nature - Researchers from the Wellcome Sanger Institute, Cambridge University Hospitals NHS Foundation Trust, and the University of Cambridge.

Neuroscience News - Dr. Andrew Lawson, co-first author at the Wellcome Sanger Institute; Dr. Pantelis Nicola, co-first author formerly of the Wellcome PhD Programme for Clinicians in Cambridge; Professor Chris Goodnow, Bill and Patricia Ritchie Chair at the Garvan Institute and University of New South Wales Sydney; Dr. Iñigo Martincorena, senior author at the Wellcome Sanger Institute.

WHAT:

Nature - The study revealed many B cell clones acquiring loss-of-function mutations in immune checkpoint genes TNFRSF14 (HVEM) and CD274 (PD-L1).

Neuroscience News - The research provides the strongest evidence to date that somatic mutations are a fundamental driver of common autoimmune diseases, specifically thyroid conditions like Hashimoto’s and Graves’ disease.

Neuroscience News - Autoimmune diseases affect 5% to 10% of the global population.

WHERE:

Neuroscience News - The study focused on autoimmune thyroid disease, including samples from patients with Hashimoto’s and Graves’ disease.

WHEN:

Neuroscience News - The findings were reported on April 14th, 2026.

Neuroscience News - The “forbidden clone” theory was first speculated about in the 1950s.

WHY:

Nature - The research supports the hypothesis that somatic mutations in autoimmune lymphocytes may allow them to escape tolerance constraints, contributing to autoimmune disease.

HOW:

Nature - The researchers used whole-exome and targeted NanoSeq, an accurate single-molecule DNA sequencing protocol, to search for driver mutations in autoimmune thyroid disease.

Nature - The study employed laser microdissection, methylation sequencing, spatial transcriptomics, immunostaining, single-nucleus DNA sequencing, and antibody synthesis to localize mutations to B cells and confirm some as self-reactive.

Neuroscience News - The researchers found that many B cells had developed inactivating mutations in key genes that control the immune system, allowing the immune system to attack healthy tissues.

(UPDATED April 15, 2026 11:20 UTC)

Researchers from the Wellcome Sanger Institute and the University of Cambridge have made significant strides in understanding autoimmune diseases, revealing that many B cell clones acquire loss-of-function mutations in immune checkpoint genes, which may drive conditions like Hashimoto’s and Graves’ disease. The findings, reported on Tuesday, provide the strongest evidence yet that somatic mutations are fundamental in these common autoimmune disorders, which affect 5% to 10% of the global population. Utilizing advanced techniques like single-molecule DNA sequencing and spatial transcriptomics, the team confirmed that these mutations allow B cells to escape immune tolerance, leading to attacks on healthy tissues.