Glucosamine and Selenium Effects in Human Retinal Neural Cells Under Glutamate Stress

In a study of human retinal neural cells under glutamate stress, glucosamine (GlcN) was found to preserve certain metabolic functions but lowered overall metabolic activity. Selenium exhibited dose-dependent effects, benefiting some metabolic aspects while increasing lipid oxidation at higher doses. Compounds like RSL3 and erastin reduced cell viability, while Ferrostatin-1 helped restore it, suggesting complex cellular interactions.

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Source: Read original source (PMID 42869306)

This plain-English summary was written by AI from a published abstract and may contain errors. It is not medical advice. Read the original study and talk to your MS team before making decisions about treatment.

Human efficacy: Not yet assessed
Mechanism: Not yet assessed
Evidence strength: Not yet assessed
Outcome: Not yet assessed

Why it matters

These findings highlight potential metabolic alterations in retinal cells during stress conditions, which may inform future research on neuroprotection in conditions like multiple sclerosis.

What this does not prove

The study does not demonstrate clinical efficacy in MS patients; it focuses solely on cellular responses in a controlled environment, not on human clinical outcomes.

Next milestone

No next milestone was established from the available source.

Study facts

Study design: Not reported
Participants / samples: Not reported
Randomised: Not reported
Controlled: Not reported
Primary endpoint met: Not reported
Relevant MS type: Not reported
Publication date: 2026-10-13
Evidence reviewed: Abstract only
Regulatory approval: Not reported
Research areas: Not classified

Original sources

Primary evidenceGlucosamine and selenium differentially regulate glutathione, lipid peroxidation, and mitochondrial function during glutamate stress in retinal neural cells. ↗DOI: 10.1016/j.freeradbiomed.2026.10.031

Supporting passages (8)

subjectsIn normal human optic nerve, redox/lipid-peroxidation programs were highest in myeloid cells, whereas hexosamine/O-GlcNAc capacity and SLC7A11 expression were prominent in astrocytic-stromal compartments.

publication date2026-10-13

interventionWe integrated human multiple-sclerosis optic-chiasm transcriptomics (GSE100297), glutamate-treated primary-neuron RNA sequencing (GSE255041), R28 differential-expression summaries, a normal human optic-nerve single-nucleus atlas (GSE236566), and R28 retinal precursor-cell experiments to characterize glucosamine (GlcN) and selenium responses.

comparatorGlutamate

findingsGlcN (2.5 mM) shifted the glutamate dose-response curve rightward and preserved GSH/GSSG and respiration, but lowered basal metabolic activity, mitochondrial membrane potential, and ATP-based viability.

findingsSelenium showed dose-dependent effects: 1 and 5 μM preserved metabolic activity, 5 μM reduced lipid oxidation, and 20 μM increased basal lipid oxidation.

findingsRSL3 and erastin markedly reduced viability without glutamate; Fer-1 substantially restored viability, whereas GlcN did not.

limitationsTitle: Glucosamine and selenium differentially regulate glutathione, lipid peroxidation, and mitochondrial function during glutamate stress in retinal neural cells.

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