Oxidized Lipid Cascade

The complete causal chain from dietary oxidized fat to systemic disease. Every node is mechanistically characterized in peer-reviewed literature.

The Full Chain

Dietary oxidized fat (OXLAMs, 4-HNE, peroxides)
        ↓
Gut epithelium: 4-HNE adducts on occludin, claudin-1, ZO-1
        ↓
Intestinal permeability increases
        ↓
LPS translocates into portal circulation (from dysbiotic gram-negative bacteria)
        ↓
Hepatic glutathione depleted processing OXLAMs → systemic distribution
        ↓
OXLAMs activate TLR4 on mast cells, macrophages, dendritic cells
        ↓
NF-κB → systemic inflammatory baseline elevated
        ↓
MERTK and AXL efferocytosis receptors inactivated by OxLDL/OXLAMs
        ↓
Efferocytosis fails → apoptotic cells undergo secondary necrosis
        ↓
Nuclear material (DNA, histones, citrullinated proteins) released
        ↓
TLR7/TLR9 activation on B cells → autoantibody production
        ↓
Estrogen dominance (beta-glucuronidase from dysbiotic gut) removes Treg brake
        ↓
B cell hyperreactivity to self-antigens → autoimmune cascade
        ↓
4-HNE adducts on prolyl hydroxylase + lysyl oxidase
        ↓
Collagen synthesis and cross-linking impaired → connective tissue failure
        ↓
4-HNE adducts on histone proteins H2A, H3, H4
        ↓
Aberrant CpG methylation at anti-inflammatory gene promoters
        ↓
Epigenetic inflammatory programming → transgenerational transmission

Key Molecules

4-Hydroxynonenal (4-HNE)

• Primary toxic aldehyde from linoleic acid oxidation
• Bifunctional electrophile — forms covalent adducts with proteins, DNA, lipids
• Specifically inhibits: prolyl hydroxylase, lysyl oxidase, Complex I/II (mitochondria), MERTK/AXL (efferocytosis), autophagy machinery
• Genotoxic and cytotoxic at concentrations found in end-of-life fryer oil
• Modifies histone proteins → epigenetic programming
• → See [[Lipid Oxidation Chemistry]]

OXLAMs (Oxidized Linoleic Acid Metabolites)

• 9-HODE, 13-HODE, 9-oxoODE, 13-oxoODE
• Direct TLR4 agonists — same receptor as LPS
• Activate mast cells through CD36 and TLR4
• Accumulate in adipose tissue as reservoir
• → See [[Lipid Oxidation Chemistry]]

Total Polar Compounds (TPC)

• The aggregate non-volatile toxic burden
• Cannot be reduced by deodorization
• The only fraud-resistant quality measure
• European standard: 25–27% maximum
• US: no standard exists
• → See [[TPC Standards]]

The Efferocytosis Node

This is the initiating event for autoimmune disease in this framework. See [[Efferocytosis Failure]] for full mechanism.

The Estrogen Node

Beta-glucuronidase from dysbiotic gram-negative bacteria deconjugates estrogen glucuronides → estrogen recirculation → estrogen dominance → TLR7/TLR9 upregulation on B cells. See [[Estrobolome]].

The Epigenetic Node

4-HNE adducts on histones + MDA modification of CpG sites = persistent inflammatory epigenetic program. See [[Epigenetic Transmission]].

Connections

• [[Substrate Thesis]] — why this matters at population level
• [[Efferocytosis Failure]] — the autoimmune initiating event
• [[Mast Cell Biology]] — NLRP3 inflammasome, FcεRI upregulation
• [[Collagen Synthesis Pathway]] — structural consequence
• [[4-HNE]] — primary molecular actor
• [[EDS-MCAS-Eczema Cluster]] — phenotypic expression
• [[Phase 0 - Source Control and Redox]] — the correction