Class II histocompatibility molecules (Ia molecules) are essential for accessory cells such as macrophages to present polypeptide antigens to helper T cells.

the verdict

SUPPORTED

the evidence backs this

Recorded sources

3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that class II histocompatibility molecules (Ia molecules) are essential for accessory cells such as macrophages to present polypeptide antigens to helper T cells?

Yes. Class II major histocompatibility complex molecules expressed by accessory cells like macrophages are required for presenting processed peptide antigens to CD4+ helper T cells.

Verdict: SUPPORTED · 3 sources for, 0 against · Last checked 4 Oct 2026

The analysis

The retrieved papers uniformly support the fundamental immunological principle that class II histocompatibility (Ia) molecules on accessory cells such as macrophages are essential for presenting polypeptide antigens to helper T cells. Papers 0, 2, and 9 provide direct experimental and clinical context showing that CD4+ T cell activation relies on MHC class II antigen presentation by macrophages or antigen-presenting cells.

Evidence for · 3

Inhibition of antigen-specific T lymphocyte activation by structurally related Ir gene-controlled polymers. Evidence of specific competition for accessory cell antigen presentation.

1983

Demonstrates that MHC class II (Ia) molecules on accessory cells are required for antigen association and presentation to specific T cell hybridomas.

Get citation

Rock, K. L. & Benacerraf, B. (1983). Inhibition of antigen-specific T lymphocyte activation by structurally related Ir gene-controlled polymers. Evidence of specific competition for accessory cell antigen presentation.. doi.org. https://doi.org/10.1084/jem.157.5.1618

See more details

More for · 2

Accessory cell stimulation of T cell proliferation requires active antigen processing, Ia-restricted antigen presentation, and a separate nonspecific 2nd signal.

1981

Shows that accessory cell stimulation of T cell proliferation requires Ia-restricted antigen presentation.

Get citation

Germain, R. N. (1981). Accessory cell stimulation of T cell proliferation requires active antigen processing, Ia-restricted antigen presentation, and a separate nonspecific 2nd signal.. doi.org. https://doi.org/10.4049/jimmunol.127.5.1964

Antigen-specific adaptive immunity in Parkinson's disease: peripheral priming, brain-border reactivation and parenchymal injury.

2026

Highlights that antigen presentation by border-associated macrophages and other cells utilizes MHC class II (HLA-II) molecules to engage CD4+ helper T cells.

Get citation

K, W., K, H., & Y, W. (2026). Antigen-specific adaptive immunity in Parkinson's disease: peripheral priming, brain-border reactivation and parenchymal injury.. doi.org. https://doi.org/10.1186/s12974-026-03918-9

Receipt History

Anyone with this link can read the claim and its public receipt, including any personal information in that text. Open permanent receipt.

Check your own claim

Challenge the receipt

I have a source that contradicts this verdict I have a source that supports it No source: request a receipt review Requests are recorded for review. This does not start an automatic check or guarantee a response time.

See the evidence timeline

Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.

This receipt is an automated verdict against our published method · not an opinion about any author or publication.
Terms · Privacy · How verdicts work