Component
Cystine uptake in N18-RE-105 neuronal hybrid cells
Context-specific entity; species, compartment and exposure are stated on each claim.
3 recorded relationships. Experimental role, claim status and evidence remain attached to each record.
How nutrients influence it
Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.
Other things that act on it
Enzymes, hormones, genes, and other components with a recorded effect. These are not nutrients, so they do not count toward the arrows above. Each finding names the chapter that recorded it.
How nutrients reach it in more than one step
Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.
Tracing routes…
What it does
Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.
What acts on it
Added extracellular glutamate inhibited cystine uptake in N18-RE-105 neuronal hybrid cells, and toxicity tracked that inhibition.
Experimental context and source evidence
- evidence_access
- Primary abstract
- experimental_model
- Neuroblastoma/primary-retina hybrid-cell culture; transport and toxicity assays.
- limitations
- The early paper does not genetically resolve SLC7A11; it is not an oral glutamate exposure study.
- nutrient_topic
- L-Glutamate collection; species, compartment, exposure, co-substrates and manipulation remain explicit. · L-Glutamate
- plain_language
- The same molecule used to build an antioxidant can obstruct another required ingredient when outside these cells.
- primary_references
- Glutamate toxicity in a neuronal cell line involves inhibition of cystine transport leading to oxidative stress. · 1989 · https://pubmed.ncbi.nlm.nih.gov/2576375/ · DOI 10.1016/0896-6273(89)90043-3
L-Glutamate / L-glutamic acid: carbon and nitrogen allocation, signaling and cross-nutrient mechanisms (2026-09-19) · lines 330–336
AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Neuroblastoma/primary-retina hybrid-cell culture; transport and toxicity assays. · source_derived_draft · unverified_draft
## glutamate-extracellular-cystine-block The same molecule used to build an antioxidant can obstruct another required ingredient when outside these cells. Added extracellular glutamate inhibited cystine uptake in N18-RE-105 neuronal hybrid cells, and toxicity tracked that inhibition. Model: Neuroblastoma/primary-retina hybrid-cell culture; transport and toxicity assays. Limitations: The early paper does not genetically resolve SLC7A11; it is not an oral glutamate exposure study. Evidence access: Primary abstract Glutamate toxicity in a neuronal cell line involves inhibition of cystine transport leading to oxidative stress. · 1989 · https://pubmed.ncbi.nlm.nih.gov/2576375/ · DOI 10.1016/0896-6273(89)90043-3
Complete structured claim and evidence
Where it participates (unsigned role)
Lowering culture-medium cystine mimicked glutamate-associated glutathione loss and oxidative cytotoxicity in N18-RE-105 cells.
Experimental context and source evidence
- availability_state
- nutrient_deficiency Imported condition classification; unverified.
- evidence_access
- Primary abstract
- experimental_model
- Neuronal hybrid-cell nutrient-withdrawal experiment.
- limitations
- The deficient precursor is cystine/cysteine supply, not glutamate; no human dietary threshold is established.
- nutrient_topic
- L-Glutamate collection; species, compartment, exposure, co-substrates and manipulation remain explicit. · L-Glutamate
- plain_language
- Removing the missing precursor reproduced the supply failure.
- primary_references
- Glutamate toxicity in a neuronal cell line involves inhibition of cystine transport leading to oxidative stress. · 1989 · https://pubmed.ncbi.nlm.nih.gov/2576375/ · DOI 10.1016/0896-6273(89)90043-3
- trigger_kind
- nutrient_deficiency Imported condition classification; unverified.
L-Glutamate / L-glutamic acid: carbon and nitrogen allocation, signaling and cross-nutrient mechanisms (2026-09-19) · lines 346–352
AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Neuronal hybrid-cell nutrient-withdrawal experiment. · source_derived_draft · unverified_draft
## glutamate-cystine-shortage Removing the missing precursor reproduced the supply failure. Lowering culture-medium cystine mimicked glutamate-associated glutathione loss and oxidative cytotoxicity in N18-RE-105 cells. Model: Neuronal hybrid-cell nutrient-withdrawal experiment. Limitations: The deficient precursor is cystine/cysteine supply, not glutamate; no human dietary threshold is established. Evidence access: Primary abstract Glutamate toxicity in a neuronal cell line involves inhibition of cystine transport leading to oxidative stress. · 1989 · https://pubmed.ncbi.nlm.nih.gov/2576375/ · DOI 10.1016/0896-6273(89)90043-3
Complete structured claim and evidenceExtracellular glutamate exposure lowered glutathione and increased intracellular peroxides in N18-RE-105 cells alongside inhibited cystine uptake.
Experimental context and source evidence
- evidence_access
- Primary abstract
- experimental_model
- Neuronal hybrid-cell transport, glutathione and peroxide assays.
- limitations
- A specific experimental toxicity mechanism is retained without inferring normal food-related brain injury.
- nutrient_topic
- L-Glutamate collection; species, compartment, exposure, co-substrates and manipulation remain explicit. · L-Glutamate
- plain_language
- Oxidative injury arose through precursor supply, a different route from opening an excitatory receptor.
- primary_references
- Glutamate toxicity in a neuronal cell line involves inhibition of cystine transport leading to oxidative stress. · 1989 · https://pubmed.ncbi.nlm.nih.gov/2576375/ · DOI 10.1016/0896-6273(89)90043-3
L-Glutamate / L-glutamic acid: carbon and nitrogen allocation, signaling and cross-nutrient mechanisms (2026-09-19) · lines 338–344
AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Neuronal hybrid-cell transport, glutathione and peroxide assays. · source_derived_draft · unverified_draft
## glutamate-extracellular-gsh-loss Oxidative injury arose through precursor supply, a different route from opening an excitatory receptor. Extracellular glutamate exposure lowered glutathione and increased intracellular peroxides in N18-RE-105 cells alongside inhibited cystine uptake. Model: Neuronal hybrid-cell transport, glutathione and peroxide assays. Limitations: A specific experimental toxicity mechanism is retained without inferring normal food-related brain injury. Evidence access: Primary abstract Glutamate toxicity in a neuronal cell line involves inhibition of cystine transport leading to oxidative stress. · 1989 · https://pubmed.ncbi.nlm.nih.gov/2576375/ · DOI 10.1016/0896-6273(89)90043-3
Complete structured claim and evidence
The events it takes part in
A mechanism often involves more than two components. These are the full events, with every participant and its role.
Situations it appears in
Low-supply and faulty-machinery situations recorded in the chapters where this component plays a part.
In the sources
Preserved passages that mention this component, quoted exactly. Open one to read it in context.
Open hypotheses
Proposed ideas that involve this component. They are labeled as hypotheses and do not change any recorded statement.
This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.