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CD26 / sCD26 (DPPIV): biomarker evidence

CD26 / sCD26 (DPPIV) appears in 1 entry of the OSMF biomarker atlas, covering ME/CFS. Across those entries it is mixed in 1. It is currently reported in a single condition in this atlas; cross-condition comparison will be added as the dataset grows. Each row below links to a page with the comparison group, associated symptoms, test details and primary citation.

ME/CFS

Where CD26 / sCD26 (DPPIV) is reported

Also listed as: T cell activation marker

ConditionDirectionCompared againstAssociated symptomsSource
ME/CFS↕ inconsistenthealthy controlsImmune dysregulationMaksoud et al. 2023

Frequently asked questions

In which conditions is CD26 / sCD26 (DPPIV) altered?

In the OSMF atlas CD26 / sCD26 (DPPIV) is reported in ME/CFS. It is mixed in 1 across 1 entries.

Is there a standard clinical test for CD26 / sCD26 (DPPIV)?

The atlas entries for CD26 / sCD26 (DPPIV) do not carry a LOINC code, which usually means the marker was measured with research assays or study-specific methods rather than a routine clinical panel.

Is one abnormal CD26 / sCD26 (DPPIV) result diagnostic?

No single biomarker result is diagnostic of any of these conditions. Findings reflect group averages from published cohorts with substantial overlap between patients and controls.

Cite this page

Open Source Medicine Foundation. (2026). CD26 / sCD26 (DPPIV) across conditions: biomarker evidence. OSMF Research Tracker. Retrieved October 7, 2026, from https://research.opensourcemed.info/biomarkers/markers/cd26-scd26-dppiv.html
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Last reviewed: 2026-06-29 · Browse: Biomarker Index · All marker pages · Biomarker Atlas

Disclaimer: Educational synthesis of peer-reviewed research; not medical advice. Findings are group-level and vary with study design. Discuss any result with a qualified clinician.