Mice acquire antibodies against a skin protein with age
An animal study across an age range found newly acquired skin-targeting antibodies alongside lifelong ones, without blisters or inflammation in aged mice.
Limit: The proposed pre-disease state rests on antibodies, without blisters or inflammation
Edited by Boris Djordjevic · AgingResearch.News
Researchers examined skin and blood serum from mice across an age range in an animal study. Aged mice showed lines of IgM, a class of antibodies, at the boundary between the skin’s outer and inner layers. They had no blisters or inflammation.
Blood IgM targeted two proteins at this boundary. Antibodies against type XVII collagen, a target in the blistering disease bullous pemphigoid, appeared with age. Antibodies against type VII collagen persisted throughout life. They were reduced in mice deficient in B-1a cells, a type of immune cell, supporting their origin as natural antibodies—antibodies present without prior exposure to their target. The authors proposed that lifelong natural antibodies coexist with age-acquired antibodies, suggesting a pre-disease state without visible symptoms of bullous pemphigoid.
Why it matters
Aging is a major risk factor for bullous pemphigoid. The work addresses how the immune system’s tolerance of the body’s own skin proteins may change with age.
Caveats
The proposed pre-disease state is an interpretation of antibody findings in mice that had no blisters or inflammation. This preprint has not been peer reviewed.
Where the evidence stands
Inflammation
- 1,019 independent labs in 75 countries
- 194 findings against
- Funders: National Institutes of Health and others
- 365 of 4,392 findings with company ties
COL17A1
- 5 independent labs in 4 countries
- Funders: Japan Society for the Promotion of Science and others
The paper
Hokkaido University
Research Square, Nov 2, 2026, Open access, Preprint, not peer-reviewed
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