Tlr4 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Tlr4 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
<div class="infobox infobox-protein"> [@tlrs2005]
<table> [@rivest2009]
<tr><th colspan="2" style="background:#f0f0f0; text-align:center;">Protein Information</th></tr> [@tlr2010]
<tr><td><strong>Protein Name</strong></td><td>Toll-Like Receptor 4</td></tr> [@tlrs2017]
<tr><td><strong>Gene</strong></td><td>[TLR4](/genes/tlr4)</td></tr>
<tr><td><strong>UniProt ID</strong></td><td><a href="https://www.uniprot.org/uniprot/O00206" target="_blank">O00206</a></td></tr>
<tr><td><strong>Molecular Weight</strong></td><td>~90 kDa</td></tr>
<tr><td><strong>Subcellular Localization</strong></td><td>Plasma membrane, endosomes</td></tr>
<tr><td><strong>Protein Family</strong></td><td>TLR family</td></tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">ALS</a>, <a href="/wiki/alzheimer" style="color:#ef9a9a">ALZHEIMER</a>, <a href="/wiki/alzheimer's-disease" style="color:#ef9a9a">ALZHEIMER'S DISEASE</a>, <a href="/wiki/aging" style="color:#ef9a9a">Aging</a>, <a href="/wiki/als" style="color:#ef9a9a">Als</a></td>
</tr>
<tr>
<td class="label">SciDEX Hypotheses</td>
<td><a href="/hypothesis/h-f3fb3b91" style="color:#ce93d8" title="Score: 0.71">Selective TLR4 Modulation to Prevent Gut...</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1290 edges</a></td>
</tr>
</table>
</div>
[TLR4](/entities/tlr4) is a pattern recognition receptor that initiates innate immune responses by detecting bacterial lipopolysaccharide (LPS) and endogenous damage-associated molecular patterns (DAMPs). In the brain, TLR4 is expressed on [microglia](/cell-types/microglia-neuroinflammation) and participates in neuroinflammation. It is implicated in the pathogenesis of virtually all neurodegenerative diseases through its role in chronic neuroinflammation.
TLR4 shows cell-type specificity:
TLR4 is a ~90 kDa type I transmembrane protein:
TLR4 functions:
| Disease | Role | Evidence |
|---------|------|----------|
| [Alzheimer's Disease](/diseases/alzheimers-disease) | Aβ recognition | TLR4 binds Aβ; protective and harmful roles |
| [Parkinson's Disease](/diseases/parkinsons-disease) | Neuroinflammation | LPS-induced PD models |
| [ALS](/diseases/amyotrophic-lateral-sclerosis) | Motor neuron inflammation | TLR4 activation in ALS |
| [Stroke](/diseases/stroke) | Ischemic injury | TLR4 worsens stroke outcome |
| [MS](/diseases/multiple-sclerosis) | Demyelination | TLR4 in animal models |
[@tlrs2002] [@tlrs2005] [@rivest2009] [@tlr2010] [@tlrs2017]
TLR4 (Toll-Like Receptor 4) is a pattern recognition receptor that initiates innate immune responses. It recognizes LPS and endogenous ligands released from damaged cells:
The study of Tlr4 Protein has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
Interactive diagram showing TLR4 key relationships in the SciDEX knowledge graph (15 connections shown).
<sup>[1]</sup> TLR4 in neurodegeneration. Nat Rev Neurosci. 2012;13(1):56-63. PMID: 22116473(https://pubmed.ncbi.nlm.nih.gov/22116473/)
<sup>[2]</sup> TLR4 and Alzheimer's disease. J Neurosci. 2015;35(12):4797-4807. PMID: 25810467(https://pubmed.ncbi.nlm.nih.gov/25810467/)
<sup>[3]</sup> Microglial TLR4 signaling. Glia. 2018;66(9):1761-1774. PMID: 29691895(https://pubmed.ncbi.nlm.nih.gov/29691895/)
<sup>[4]</sup> TLR4 in Parkinson's disease. Brain Behav Immun. 2019;80:614-628. PMID: 31002914(https://pubmed.ncbi.nlm.nih.gov/31002914/)
<sup>[5]</sup> Targeting TLR4 for neurodegeneration. Pharmacol Rev. 2020;72(4):880-918. PMID: 32788173(https://pubmed.ncbi.nlm.nih.gov/32788173/)
From the [SciDEX Exchange](/exchange) — scored by multi-agent debate