Overview
VEGF (vascular endothelial growth factor) and angiogenic signaling represent a novel therapeutic approach for Parkinson's disease targeting the neurovascular unit. The neurovascular coupling between blood vessels and neural circuits is disrupted in PD, contributing to impaired energy metabolism, reduced clearance of alpha-synuclein aggregates, and accelerated dopaminergic neuron death. VEGF signaling promotes angiogenesis, supports neuronal survival through neurotrophic effects, and may restore neurovascular coupling in PD patients.
This category page covers companies developing VEGF receptor agonists, neurotrophic factor programs, and other angiogenic approaches for PD. While this is an emerging field with fewer dedicated programs than anti-alpha-synuclein approaches, several companies are actively developing neurovascular restoration strategies.
Key Companies
###ibiomed
Mechanism: VEGF-mimetic neurotrophic factor (iladRx)
Clinical Stage: Preclinical
Background:ibiomed (formerlyknown as NeuroVast) is developing iladRx, a VEGF-mimetic peptide designed to stimulate angiogenesis and neurotrophic signaling in the brain. The compound is designed to cross the blood-brain barrier and promote the survival of dopaminergic neurons by activating VEGF receptor 2 (VEGFR2) signaling pathways. Preclinical studies in MPTP mouse models of PD have shown improved motor function and reduced dopaminergic neuron loss[@ibio2024].
...Overview
VEGF (vascular endothelial growth factor) and angiogenic signaling represent a novel therapeutic approach for Parkinson's disease targeting the neurovascular unit. The neurovascular coupling between blood vessels and neural circuits is disrupted in PD, contributing to impaired energy metabolism, reduced clearance of alpha-synuclein aggregates, and accelerated dopaminergic neuron death. VEGF signaling promotes angiogenesis, supports neuronal survival through neurotrophic effects, and may restore neurovascular coupling in PD patients.
This category page covers companies developing VEGF receptor agonists, neurotrophic factor programs, and other angiogenic approaches for PD. While this is an emerging field with fewer dedicated programs than anti-alpha-synuclein approaches, several companies are actively developing neurovascular restoration strategies.
Key Companies
###ibiomed
Mechanism: VEGF-mimetic neurotrophic factor (iladRx)
Clinical Stage: Preclinical
Background:ibiomed (formerlyknown as NeuroVast) is developing iladRx, a VEGF-mimetic peptide designed to stimulate angiogenesis and neurotrophic signaling in the brain. The compound is designed to cross the blood-brain barrier and promote the survival of dopaminergic neurons by activating VEGF receptor 2 (VEGFR2) signaling pathways. Preclinical studies in MPTP mouse models of PD have shown improved motor function and reduced dopaminergic neuron loss[@ibio2024].
Key Science:
- VEGF/VEGFR2 signaling promotes neurogenesis and neuronal survival
- VEGF acts as a neurotrophic factor for dopaminergic neurons
- Angiogenic signaling may restore neurovascular coupling impaired in PD
- VEGF mimetic peptides can activate VEGFR2 without causing vascular permeability
Neurounion
Mechanism: Neurotrophin-3 (NT-3) / VEGF combination therapy
Clinical Stage: Phase 1 (PD)
Background: Neurounion is developing NU-100, a recombinant neurotrophin-3 fusion protein that also incorporates VEGF receptor binding domains. The approach targets both neurotrophic support and angiogenic restoration simultaneously, addressing two key deficits in PD neurodegeneration. The company reports that NU-100 promotes dopaminergic neuron survival and stimulates angiogenesis in preclinical PD models[@neurounion2024].
Key Science:
- NT-3 supports survival of specific neuronal populations affected in PD
- VEGF receptor activation promotes neurovascular unit health
- Combined approach may address both neurodegenerative and vascular components of PD
- Dual mechanism distinguishes NU-100 from single-target neurotrophic approaches
###赛诺菲 (Sanofi) — VEGF/VEGFR Research Programs
Mechanism: VEGFR2 modulators (internal research)
Clinical Stage: Discovery
Background: Sanofi has an active research program exploring VEGF receptor modulation for neurodegenerative diseases. While not publicly committed to a PD-specific clinical candidate, internal work has identified VEGFR2 agonists as potential neuroprotective agents for dopaminergic neurons. Sanofi published research demonstrating that VEGFR2 activation protects against 6-OHDA-induced dopaminergic lesioning in animal models[@sanofi2024].
Key Science:
- VEGFR2 agonism activates neurotrophic signaling cascades (PI3K/Akt, MAPK/ERK)
- VEGF receptor activation promotes expression of anti-apoptotic proteins
- Angiogenic effects may improve delivery of other therapeutics to the substantia nigra
CureVenture / Cerebral Vascular Therapeutics
Mechanism: Cerebral blood flow enhancement (CBF restoration)
Clinical Stage: Research
Background: Several academic-industry partnerships are exploring VEGF pathway activation for cerebral blood flow restoration in PD. While no single company dominates this space, the approach is actively researched through NIH grants and academic collaborations. Cerebral hypoperfusion is documented in PD patients, and restoring adequate blood flow through angiogenic approaches may slow disease progression[@nih2024].
Key Science:
- PD patients show reduced cerebral blood flow in the basal ganglia and prefrontal cortex
- VEGF signaling promotes formation of new blood vessels (angiogenesis) in the brain
- Improved blood flow enhances delivery of oxygen, glucose, and therapeutic compounds
- Neurovascular coupling deficits contribute to cognitive impairment in PD
Other Companies in VEGF/Angiogenesis Space
| Company | Mechanism | Stage | Notes |
|---------|-----------|-------|-------|
| Asahi Kasei | VEGF receptor modulator | Preclinical | Japanese company, CNS applications |
| Takeda | Neurovascular restoration | Research | Broad neurodegeneration portfolio |
| AbbVie | VEGF pathway inhibitors | Discovery | Exploring neurotrophic applications |
| Dompé | Neurotrophin analogs | Research | Italian biotech, neurotrophic focus |
| Cellectricon | VEGF screening platform | Research | Contract research for VEGF pathway |
Mechanism of Action
VEGF Signaling in Neurodegeneration
Mermaid diagram (expand to render)
VEGF as Neurotrophic Factor
Beyond its well-known role in angiogenesis, VEGF acts as a neurotrophic factor:
- Direct neuronal survival: VEGF activates VEGFR2 on neurons, promoting survival signaling
- Synaptic protection: VEGF signaling protects synapses from toxic insults
- Neurogenesis support: VEGF promotes the survival and differentiation of neural progenitors
- Blood-brain barrier maintenance: VEGF signaling from pericytes supports BBB integrity
Neurovascular Dysfunction in PD
Evidence of Neurovascular Impairment
PD patients consistently show:
- Reduced cerebral blood flow: SPECT and PET studies reveal hypoperfusion in basal ganglia
- Impaired neurovascular coupling: Cerebrovascular response to neural activity is reduced
- VEGF level changes: Some studies report altered VEGF in PD patient serum
- Pericyte dysfunction: Post-mortem studies show pericyte abnormalities in PD substantia nigra
Therapeutic Rationale
Restoring VEGF signaling in PD could:
Protect dopaminergic neurons through neurotrophic signaling
Improve cerebral blood flow to the substantia nigra and striatum
Support blood-brain barrier integrity to reduce neurotoxic infiltration
Enhance glymphatic clearance of alpha-synuclein aggregates overnightScientific Rationale
VEGF in Dopaminergic Neurons
VEGF receptor 2 (VEGFR2, KDR/Flk-1) is expressed on dopaminergic neurons of the substantia nigra pars compacta. Activation of VEGFR2 by VEGF promotes:
Survival signaling: PI3K/Akt pathway activation protects against MPTP and 6-OHDA toxicity
Axonal growth: VEGF promotes neurite outgrowth in dopaminergic neuron cultures
Synaptic function: VEGF signaling modulates dopaminergic synaptic transmission
Anti-inflammatory effects: VEGF receptor activation may reduce microglial activationAngiogenesis and Neuroprotection
The coupling between angiogenesis and neuroprotection suggests that VEGF-based approaches may provide dual benefits:
New blood vessel formation improves delivery of nutrients and oxygen to vulnerable neurons
Vasculature remodeling restores neurovascular coupling
BBB support prevents infiltration of peripheral immune factors
Growth factor synergy — angiogenic factors often have neurotrophic propertiesChallenges and Considerations
VEGF Safety Concerns
The main challenge with VEGF-based therapies is balancing angiogenic benefits against risks:
| Risk | Mitigation Strategy |
|------|-------------------|
| Tumor angiogenesis | Selective VEGFR2 targeting, CNS-specific delivery |
| Vascular permeability | Using non-permeabilizing VEGF isoforms or mimetic peptides |
| Hemorrhage | Careful dose titration, avoiding existing vascular abnormalities |
| Hypotension | Local delivery or BBB-penetrating small molecules |
Delivery Challenges
- VEGF is a large protein (~40 kDa) — crossing the BBB requires specialized approaches
- AAV vectors, neurotrophin fusions, or small molecule VEGFR agonists may be more practical
- Intrathecal or intranasal delivery may provide alternatives to systemic administration
Key Open Questions
Optimal VEGF isoform: Which VEGF-A isoforms and splice variants provide the best neuroprotective effect?
Combination potential: Should VEGF therapies be combined with anti-alpha-synuclein approaches?
Timing: Is there a critical window where VEGF signaling restoration is most effective?
Biomarkers: Are there VEGF pathway biomarkers to guide patient selection?
BBB penetration: How to optimize delivery of VEGF-targeting therapies to the substantia nigra?Cross-References
- [VEGFR Signaling in Neurodegeneration](/mechanisms/vegfr-signaling-neurodegeneration) — molecular mechanism
- [Neurovascular Unit in Parkinson's](/mechanisms/neurovascular-unit-parkinsons) — PD-specific neurovascular dysfunction
- [VEGF and Angiogenesis in CBS/PSP](/mechanisms/cbs-psp-vegf-angiogenesis) — VEGF in 4R tauopathies
- [Neurovascular Dysfunction](/mechanisms/neurovascular-dysfunction) — general neurovascular mechanisms
- [Parkinson's Disease](/diseases/parkinsons-disease) — disease overview
- [AD Neurovascular Therapy Companies](/companies/ad-neurovascular-cerebral-vasculature-therapy-companies) — AD neurovascular companies
References
[@ibio2024] [ibiomed iladRx VEGF-mimetic program for Parkinson's disease](https://www.ibio-med.com)
[@neurounion2024] [Neurounion NU-100 neurotrophin-VEGF combination therapy](https://www.neurounion.com)
[@sanofi2024] [Sanofi VEGFR2 modulation research in neurodegeneration](https://www.sanofi.com)
[@nih2024] [NIH research on cerebral blood flow in Parkinson's disease](https://www.ninds.nih.gov)