Component
Rat stearoyl-CoA desaturase 1 / Scd1
Context-specific entity; species, compartment and exposure are stated on each claim.
2 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
Methionine restriction reduced hepatic Scd1 expression and serum fatty-acid desaturation indices; cysteine supplementation reversed these changes.
Experimental context and source evidence
- evidence_access
- Primary abstract
- experimental_model
- Rat liver RNA/protein and serum lipid profiling.
- limitations
- Desaturation indices are indirect activity readouts; no isolated human enzyme effect is established.
- nutrient_topic
- L-Methionine collection; species, compartment, exposure, co-substrates and manipulation remain explicit. · L-Methionine
- plain_language
- Sulfur-amino-acid composition influenced a lipid-metabolism enzyme.
- primary_references
- Cysteine supplementation reverses methionine restriction effects on rat adiposity: significance of stearoyl-coenzyme A desaturase. · 2011 · https://pubmed.ncbi.nlm.nih.gov/20871132/ · DOI 10.1194/jlr.M010215
L-Methionine: transport, methylation, sulfur metabolism and cross-nutrient mechanisms (2026-09-19) · lines 372–378
AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Rat liver RNA/protein and serum lipid profiling. · source_derived_draft · unverified_draft
## methionine-rat-scd1-response Sulfur-amino-acid composition influenced a lipid-metabolism enzyme. Methionine restriction reduced hepatic Scd1 expression and serum fatty-acid desaturation indices; cysteine supplementation reversed these changes. Model: Rat liver RNA/protein and serum lipid profiling. Limitations: Desaturation indices are indirect activity readouts; no isolated human enzyme effect is established. Evidence access: Primary abstract Cysteine supplementation reverses methionine restriction effects on rat adiposity: significance of stearoyl-coenzyme A desaturase. · 2011 · https://pubmed.ncbi.nlm.nih.gov/20871132/ · DOI 10.1194/jlr.M010215
Complete structured claim and evidenceHFCS-55 exposure was associated with increased hepatic Scd1 expression in female rats.
Experimental context and source evidence
- dose
- 13% w/v HFCS-55, sucrose or fructose solution versus water
- duration
- 8 weeks
- evidence_access
- Primary abstract/metadata; unrecovered methods explicitly retained.
- evidence_scope
- literature_reviewed; source-specific curation
- experimental_model
- Female rats, seven per group
- exposure_scope
- Direct HFCS-55 animal evidence
- limitations
- Hypercaloric animal setting. Expression and fatty-acid composition suggest lipogenesis but are not isotope flux measurements; differences do not establish HFCS superiority/inferiority in humans.
- nutrient_topic
- HFCS chapter: actual formulation studies, component biochemistry and interventions are explicitly distinguished. · High-Fructose Corn Syrup / HFCS
- organism
- Female rats, seven per group
- plain_language
- HFCS-55 exposure was associated with increased hepatic Scd1 expression in female rats.
- primary_references
- High-fructose corn syrup-55 consumption alters hepatic lipid metabolism and promotes triglyceride accumulation. (2017). https://pubmed.ncbi.nlm.nih.gov/27768909/ DOI: 10.1016/j.jnutbio.2016.09.010
- route
- Oral ad libitum solution
- tissue
- Hepatic lipid and expression endpoints
High-Fructose Corn Syrup: mechanism of action and metabolic impact (2026-09-20) · lines 437–447
Original AI-assisted curation of twenty primary studies and official FDA composition information, with one reused canonical glucose-transport claim. Study-specific citations, negative findings and limitations retained. Not publisher full text. · supports · Female rats, seven per group · source_derived_draft · unverified_draft
## hfcs-rat-scd1 HFCS-55 exposure was associated with increased hepatic Scd1 expression in female rats. Model/species: Female rats, seven per group Tissue: Hepatic lipid and expression endpoints Exposure: 13% w/v HFCS-55, sucrose or fructose solution versus water Route: Oral ad libitum solution Duration: 8 weeks Exposure scope: Direct HFCS-55 animal evidence Limits: Hypercaloric animal setting. Expression and fatty-acid composition suggest lipogenesis but are not isotope flux measurements; differences do not establish HFCS superiority/inferiority in humans. Reference: High-fructose corn syrup-55 consumption alters hepatic lipid metabolism and promotes triglyceride accumulation. (2017). https://pubmed.ncbi.nlm.nih.gov/27768909/ DOI: 10.1016/j.jnutbio.2016.09.010 Access: Primary abstract/metadata; unrecovered methods explicitly retained.
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.