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Brain-derived neurotrophic factor (BDNF) across conditions

Brain-derived neurotrophic factor (BDNF) appears in 2 entries of the OSMF biomarker atlas, covering Gulf War Illness, Major Depressive Disorder. Across those entries it is reduced in 1, mixed in 1. Because the same marker shifts in several unrelated conditions, it is best understood as a signal of shared biology such as inflammation, vascular or metabolic stress rather than as a condition-specific test. Each row below links to a page with the comparison group, associated symptoms, test details and primary citation.

Gulf War IllnessMajor Depressive Disorder

Where Brain-derived neurotrophic factor (BDNF) is reported

Also listed as: BDNF; Neurotrophin

ConditionDirectionCompared againstAssociated symptomsSource
Gulf War Illness↕ inconsistenthealthy Gulf War veteran controlsCognitive dysfunctionGean et al. 2021
Major Depressive Disorder↓ reducedMDD patients vs healthy controls—Nobis et al. 2020

Frequently asked questions

In which conditions is Brain-derived neurotrophic factor (BDNF) altered?

In the OSMF atlas Brain-derived neurotrophic factor (BDNF) is reported in Gulf War Illness, Major Depressive Disorder. It is reduced in 1, mixed in 1 across 2 entries.

Does Brain-derived neurotrophic factor (BDNF) point to one specific diagnosis?

No. Because Brain-derived neurotrophic factor (BDNF) changes in several conditions (Gulf War Illness, Major Depressive Disorder), an abnormal result cannot identify which condition, if any, is present. It must be interpreted with symptoms, history and other tests.

Is there a standard clinical test for Brain-derived neurotrophic factor (BDNF)?

The atlas entries for Brain-derived neurotrophic factor (BDNF) 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 Brain-derived neurotrophic factor (BDNF) 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). Brain-derived neurotrophic factor (BDNF) across conditions: biomarker evidence. OSMF Research Tracker. Retrieved October 7, 2026, from https://research.opensourcemed.info/biomarkers/markers/brain-derived-neurotrophic-factor-bdnf.html
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Last reviewed: 2026-07-03 · 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.