<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">TGFB1 — Transforming Growth Factor Beta 1</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>TGFB1</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>19q13.2</td>
</tr>
<tr>
<td class="label">Official Full Name</td>
<td>Transforming Growth Factor Beta 1</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>P01137</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000127616</td>
</tr>
<tr>
<td class="label">Gene Type</td>
<td>Protein coding</td>
</tr>
<tr>
<td class="label">Length</td>
<td>23,431 bp (genomic)</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>390 amino acids (latent propeptide + 112 aa mature)</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">ALS</a>, <a href="/wiki/aging" style="color:#ef9a9a">Aging</a>, <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></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">371 edges</a></td>
</tr>
</table>
Overview
TGFB1 encodes Transforming Growth Factor Beta 1, a key cytokine with complex roles in neuroinflammation, neuroprotection, and synaptic plasticity. Dysregulation of TGFB1 signaling is implicated in multiple neurodegenerative diseases including Alzheimer's disease (AD), Parkinson's disease (PD), and amyotrophic lateral sclerosis (ALS)[@tesseur2006].
Protein Structure and Function
TGF-beta1 is synthesized as a preproprotein consisting of:
- Signal peptide: 1-29 aa
- Latency-associated peptide (LAP): 30-249 aa
- Mature TGF-beta1: 250-390 aa (112 aa active cytokine)
Activation Mechanism
TGF-beta1 requires activation from its latent form:
Latent Complex: TGF-beta1 is secreted bound to LAP, forming the small latent complex (SLC)
Latent TGF-beta Binding Protein (LTBP): In the large latent complex (LLC), LTBP targets TGF-beta to the extracellular matrix
Activation: Various stimuli can release active TGF-beta1:
- Proteases (MMP-2, MMP-9, plasmin)
- Integrins (alpha-v-beta-6, alpha-v-beta-8)
- [Reactive oxygen species](/entities/reactive-oxygen-species)
- Acidic microenvironment
Signaling Pathway
Active TGF-beta1 binds to:
Type II receptor (TGFBR2): Constitutively active serine/threonine kinase
Type I receptor (TGFBR1/ALK5): Recruited and phosphorylated by TGFBR2
SMAD proteins: R-SMAD2/3 form complexes with SMAD4
Nuclear translocation: SMAD complexes regulate gene transcriptionRole in Neurodegeneration
Alzheimer's Disease
TGF-beta1 has complex, stage-dependent roles in AD[@caraci2012]:
- Neuroprotective Effects: Promotes neuronal survival, modulates amyloid metabolism
- Microglial Modulation: Can shift [microglia](/cell-types/microglia-neuroinflammation) toward a protective phenotype
- [Blood-Brain Barrier](/entities/blood-brain-barrier): Regulates BBB integrity and function
- Synaptic Plasticity: Influences hippocampal synaptic function
Parkinson's Disease
In PD, TGF-beta1 signaling is implicated in[@sanches2021]:
- Dopaminergic Neuroprotection: TGF-beta1 can protect dopaminergic [neurons](/entities/neurons)
- Neuroinflammation: Modulates microglial activation states
- [Alpha-Synuclein](/proteins/alpha-synuclein): May influence aggregation and clearance
Amyotrophic Lateral sclerosis
TGF-beta1 dysregulation is observed in ALS[@phatnani2013]:
- Increased TGF-beta1 in serum and CSF of ALS patients
- Motor neuron vulnerability
- Glial cell involvement
Genetic Associations
Single Nucleotide Polymorphisms (SNPs)
- rs1800469 (-509C>T): Associated with TGF-beta1 expression levels
- rs1982073 (T29C): Affects protein secretion
- rs1800470 (L10P): Alters bioactivity
Expression Changes in Disease
- Elevated TGFB1 in AD [hippocampus](/brain-regions/hippocampus) and [cortex](/brain-regions/cortex)
- Increased in PD substantia nigra
- Upregulated in ALS motor cortex and spinal cord
Therapeutic Implications
TGF-beta-Based Therapies
- Recombinant TGF-beta1: Being explored for neuroprotection
- Small Molecule Agonists: Targeting TGF-beta receptors
- Gene Therapy: AAV-mediated delivery in preclinical models
Challenges
- Complex dose-dependent effects
- Peripheral vs. central nervous system delivery
- Need for targeted approaches
Receptors
- [TGFBR1](/proteins/tgfbr1-protein) - Type I receptor
- [TGFBR2](/proteins/tgfbr2-protein) - Type II receptor
Signaling Molecules
- SMAD2 - R-SMAD
- SMAD3 - R-SMAD
- SMAD4 - Co-SMAD
- [Neuroinflammation](/mechanisms/neuroinflammation-microglia)
- [Blood-Brain Barrier](/mechanisms/blood-brain-barrier)
- [TGF-beta Signaling](/mechanisms/tgf-beta-signaling)
See Also
- [TGFB1 Protein](/proteins/tgfbr1-protein)
- [Neuroinflammation](/mechanisms/neuroinflammation-microglia)
- [Blood-Brain Barrier](/mechanisms/blood-brain-barrier)
- [TGF-beta Signaling](/mechanisms/tgf-beta-signaling)
External Links
- [Ensembl: ENSG00000127616](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000127616)
- [NCBI Gene: TGFB1](https://www.ncbi.nlm.nih.gov/gene/?term=TGFB1)
- [GeneCards: TGFB1](https://www.genecards.org/cgi-bin/carddisp.pl?gene=TGFB1)
- [OMIM: TGFB1](https://omim.org/search?search=TGFB1)
- [Allen Brain Atlas: TGFB1](https://human.brain-map.org/microarray/search/show?search_term=TGFB1)
TGFβ in Immune Modulation
Neuroinflammation
TGFβ effects on immune cells[@tesseur2006]
Microglial modulation:
- [Anti-inflammatory](/clinical-trials/ntrx-07-neurotherapia-nct07058688)
- [Phagocytosis](/therapeutics/phagocytosis-modulation-therapy)
- Surveillance
References
TGFβ1: Comprehensive Analysis
Signal Transduction
Intracellular pathways[@tesseur2006]
SMAD-dependent:
- Receptor activation
- SMAD complex formation
- Nuclear translocation
SMAD-independent:
Receptor Biology
Type I, II, and III receptors[@sanches2021]
Ligand binding:
- TGFβ1, β2, β3
- Latent TGFβ binding
- Activation mechanisms
Signal modulation:
- Receptor traffi- Endocytosis
- D
TGFβ in the Nervous System
Neurodevelopment
Developmental functions[^5][^6]:
Neurulation:
- Neural tube formation
- Dorsal-ventral patterning
- Cell fate decisions
Cortical development:
- Proliferation
- Migration
- Differentiation
Synaptic Function
Activity modulation[^7][^8]:
Synaptic plasticity:
- LTP/LTD effects
- Homeostatic plasticity
- Behavior
Neurotransmission:
- GABAergic signaling
- Glutamate receptors
- Excitability
Neuroinflammation
Microglial Modulation
TGFβ effects on glia[^9][^10]:
Anti-inflammatory:
- M2 polarization
- Cytokine production
- Phagocytosis
Neuroprotection:
- Trophic support
- Tissue repair
- Aβ clearance
Autoimmune Diseases
MS and EAE[^11][^12]:
Pro-inflammatory effects:
- Th17 differentiation
- Demyelination
- Pathology
Therapeutic targeting:
- Neutralizing antibodies
- Receptor kinase inhibitors
- Cell therapy
Tissue Repair
Wound Healing
Regeneration mechanisms[^13][^14]:
Inflammation phase:
- Immune cell recruitment
- Cytokine release
- Debridement
Proliferation:
- Fibroblast proliferation
- Extracellular matrix
- Angiogenesis
Remodeling:
- Collagen deposition
- Scar formation
- Maturation
Fibrosis
Pathological scarring[^15][^16]:
Mechanisms:
- Myofibroblast differentiation
- ECM accumulation
- Contraction
Therapeutic approaches:
- TGFβ neutralization
- Kinase inhibitors
- Gene therapy
References
[^5[^7
From the [SciDEX Exchange](/exchange) — scored by multi-agent debate
- [Ocular Immune Privilege Extension](/hypothesis/h-6a065252) — <span style="color:#ffd54f;font-weight:600">0.47</span> · Target: FOXP3/TGFB1
- [Microbiome-Derived Tryptophan Metabolite Neuroprotection](/hypothesis/h-f9c6fa3f) — <span style="color:#ff8a65;font-weight:600">0.39</span> · Target: AHR, IL10, TGFB1
Pathway Diagram
Mermaid diagram (expand to render)
Pathway Diagram
The following diagram shows the key molecular relationships involving TGFB1 — Transforming Growth Factor Beta 1 discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)