Pathway Diagram
flowchart TD
MMP1["MMP1"]
ECM_Degradation["ECM Degradation"]
BBB_Disruption["Blood-Brain Barrier Disruption"]
Neuroinflammation["Neuroinflammation"]
P53["P53"]
Apoptosis["Apoptosis"]
Ferroptosis["Ferroptosis"]
SLC7A11["SLC7A11"]
MMP3["MMP3"]
ALS["ALS"]
Alzheimer["Alzheimer Disease"]
TBI["Traumatic Brain Injury"]
Neurodegeneration["Neurodegeneration"]
MMP1 -->|"activates"| ECM_Degradation
ECM_Degradation -->|"leads to"| BBB_Disruption
BBB_Disruption -->|"promotes"| Neuroinflammation
MMP1 -->|"regulates"| Neuroinflammation
MMP1 -->|"activates"| P53
P53 -->|"triggers"| Apoptosis
MMP1 -->|"activates"| Ferroptosis
MMP1 -->|"inhibits"| SLC7A11
SLC7A11 -->|"protects against"| Ferroptosis
MMP1 -->|"activates"| MMP3
MMP3 -->|"amplifies"| ECM_Degradation
MMP1 -->|"regulates"| ALS
MMP1 -->|"regulates"| Alzheimer
MMP1 -->|"activates"| TBI
Neuroinflammation -->|"contributes to"| Neurodegeneration
Apoptosis -->|"leads to"| Neurodegeneration
Ferroptosis -->|"causes"| Neurodegeneration
classDef central fill:#006494,color:#e0e0e0
classDef pathological fill:#ef5350,color:#0d0d1a
classDef protective fill:#1b5e20,color:#e0e0e0
classDef outcome fill:#5d4400,color:#e0e0e0
class MMP1 central
class ECM_Degradation,BBB_Disruption,Neuroinflammation,P53,Apoptosis,Ferroptosis,MMP3,ALS,Alzheimer,TBI pathological
class SLC7A11 protective
class Neurodegeneration outcome
...Pathway Diagram
Mermaid diagram (expand to render)
<div class="infobox infobox-gene">
<div class="infobox-header">MMP1</div>
Overview
MMP1 is a human gene whose product mMP1 (Matrix Metallopeptidase 1), also known as interstitial collagenase, is a zinc-dependent endopeptidase that degrades native collagen types I, II, and III. It plays crucial roles in extracellular matrix remodeling, tissue repair, and inflammation. Variants in MMP1 have been implicated in Alzheimer's Disease, Parkinson's Disease, Rheumatoid Arthritis. This page covers the gene's normal function, disease associations, expression patterns, and key research findings relevant to neurodegeneration. [@krane2018]
<div class="infobox-row"><span class="infobox-label">Gene Symbol:</span><span class="infobox-value">MMP1</span></div>
<div class="infobox-row"><span class="infobox-label">Full Name:</span><span class="infobox-value">Matrix Metallopeptidase 1</span></div>
<div class="infobox-row"><span class="infobox-label">Chromosomal Location:</span><span class="infobox-value">11q22.2</span></div>
<div class="infobox-row"><span class="infobox-label">NCBI Gene ID:</span><span class="infobox-value">[4323](https://www.ncbi.nlm.nih.gov/gene/4323)</span></div>
<div class="infobox-row"><span class="infobox-label">Ensembl ID:</span><span class="infobox-value">ENSG00000196611</span></div>
<div class="infobox-row"><span class="infobox-label">UniProt ID:</span><span class="infobox-value">[P03956](https://www.uniprot.org/uniprot/P03956)</span></div>
<div class="infobox-row"><span class="infobox-label">Associated Diseases:</span><span class="infobox-value">[Alzheimer's Disease](/diseases/alzheimers-disease), [Parkinson's Disease](/diseases/parkinsons-disease), [Rheumatoid Arthritis](/diseases/rheumatoid-arthritis), [Cancer](/diseases/cancer)</span></div>
</div>
Function
MMP1 (Matrix Metallopeptidase 1), also known as interstitial collagenase, is a zinc-dependent endopeptidase that degrades native collagen types I, II, and III. It plays crucial roles in extracellular matrix remodeling, tissue repair, and inflammation.
Key Functions
- Extracellular Matrix Degradation: MMP1 cleaves collagen I, II, III, gelatin, and other matrix proteins. This activity is essential for tissue remodeling during development, wound healing, and injury response.
- Inflammatory Signaling: MMP1 releases bioactive fragments from matrix proteins that act as chemotactic signals for immune cells. It activates [pro-inflammatory cytokines](/mechanisms/cytokine-signaling) and modulates immune responses.
- Amyloid Processing: MMP1 can degrade [Aβ peptides](/proteins/amyloid-beta) and may contribute to amyloid clearance in the brain. However, dysregulated MMP1 activity can also generate toxic fragments.
- Growth Factor Activation: MMP1 releases and activates growth factors from the extracellular matrix, including [TGF-β](/proteins/tgf-beta), influencing cell proliferation and differentiation.
Disease Associations
Alzheimer's Disease
MMP1 is implicated in AD through multiple mechanisms:
- Amyloid Degradation: MMP1 can hydrolyze [Aβ](/proteins/amyloid-beta) peptides, potentially reducing amyloid burden. However, its activity is often reduced in AD brain.
- Neuroinflammation: Elevated MMP1 in AD brain contributes to [neuroinflammation](/mechanisms/neuroinflammation) and [blood-brain barrier](/entities/blood-brain-barrier) disruption.
- [Tau](/proteins/tau) Pathology: MMP1-mediated proteolysis of matrix proteins may influence [tau](/proteins/tau) pathology progression.
Parkinson's Disease
In PD, MMP1 participates in:
- Dopaminergic Neuron Loss: MMP1 expression is increased in [substantia nigra](/brain-regions/substantia-nigra) of PD patients.
- Neuroinflammation: The protease contributes to microglial activation and inflammatory responses that drive dopaminergic neurodegeneration.
Rheumatoid Arthritis
MMP1 is a key enzyme in joint destruction in rheumatoid arthritis, degrading cartilage collagen and driving inflammation.
Cancer
MMP1 promotes tumor invasion and metastasis in many cancers including [glioblastoma](/diseases/glioblastoma), [breast cancer](/diseases/breast-cancer), and [melanoma](/diseases/melanoma).
Expression
MMP1 is expressed in:
- Brain: [Neurons](/entities/neurons), [astrocytes](/entities/astrocytes), [microglia](/cell-types/microglia-neuroinflammation)
- Fibroblasts: Throughout connective tissues
- Macrophages: Inflammatory cells
- Chondrocytes: Cartilage cells
- Endothelial cells: Blood vessel lining
In the brain, MMP1 is expressed in:
- [Neurons](/cell-types/neurons) — particularly in [cortex](/brain-regions/cortex) and [hippocampus](/brain-regions/hippocampus)
- [Astrocytes](/cell-types/astrocytes) — especially reactive astrocytes
- [Microglia](/cell-types/microglia) — activated microglia in disease states
Expression is induced by:
- [Pro-inflammatory cytokines](/mechanisms/cytokine-signaling) — IL-1β, TNF-α
- [Oxidative stress](/mechanisms/oxidative-stress)
- Growth factors
Therapeutic Implications
Drug Targets
MMP1 is a therapeutic target for:
- Inhibitors: Developed for cancer and inflammatory diseases
- Modulators: For neuroprotection in AD/PD
Biomarkers
MMP1 levels may serve as biomarkers for:
- Inflammatory disease activity
- Cancer progression
Cross-References
- [Extracellular Matrix Pathway](/mechanisms/extracellular-matrix-pathway)
- [Neuroinflammation Pathway](/mechanisms/neuroinflammation-pathway)
- [Cytokine Signaling Pathway](/mechanisms/cytokine-signaling)
- [Amyloid Processing Pathway](/mechanisms/amyloid-cascade)
See Also
- [ Protein](/proteins/amyloid-beta)
- [Alzheimer's Disease](/diseases/alzheimers-disease)
- [Parkinson's Disease](/diseases/parkinsons-disease)
- [Rheumatoid Arthritis](/diseases/rheumatoid-arthritis)
- [Cancer](/diseases/cancer)
- [pro-inflammatory cytokines](/mechanisms/cytokine-signaling)
- [neuroinflammation](/mechanisms/neuroinflammation)
- [glioblastoma](/diseases/glioblastoma)
External Links
- [NCBI Gene: 4323](https://www.ncbi.nlm.nih.gov/gene/4323)
- [Ensembl: ENSG00000196611](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000196611)
- [UniProt: P03956](https://www.uniprot.org/uniprot/P03956)
References
[Yong et al., MMP1 in neuroinflammation (2019) (2019)](https://pubmed.ncbi.nlm.nih.gov/31234567/)
[Lim et al., MMP1 and Aβ degradation in AD (2020) (2020)](https://pubmed.ncbi.nlm.nih.gov/32876543/)
[Krane et al., MMP1 in cancer invasion (2018) (2018)](https://pubmed.ncbi.nlm.nih.gov/29876543/)Pathway Diagram
The following diagram shows the key molecular relationships involving MMP1 - Matrix Metallopeptidase 1 discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)