Hypothesis Comparison

graph TD
    A["Choroid Plexus
Epithelial Cell"] --> B["AQP1 Water Channel
Enhancement"]
    A --> C["Na+/K+-ATPase Pump
Basolateral Membrane"]
    B --> D["Increased Water Transport
Across Apical Membrane"]
    C --> E["Sodium Gradient
Establishment"]
    E --> F["Osmotic Driving Force
Generation"]
    D --> G["CSF Production
Restoration"]
    F --> G
    H["Carbonic Anhydrase II
Bicarbonate Formation"] --> I["Na+/HCO3- Cotransporter
NBC Activity"]
    I --> J["Ionic Homeostasis
Maintenance"]
    K["Inflammatory Cytokines
TNF-alpha and IL-1beta"] --> L["NF-kappaB Pathway
Activation"]
    L --> M["AQP1 Gene
Transcriptional Suppression"]
    N["Oxidative Stress"] --> O["p38 MAPK Pathway
Activation"]
    O --> P["AQP1 Protein Stability
Reduction"]
    Q["HIF-1alpha Transcription
Factor Dysregulation"] --> M
    G --> R["Enhanced CSF Clearance
of Toxic Aggregates"]
    J --> G
    R --> S["Neuroprotection and
Reduced Neurodegeneration"]

    classDef normal fill:#4fc3f7
    classDef therapeutic fill:#81c784
    classDef pathology fill:#ef5350
    classDef outcome fill:#ffd54f
    classDef molecular fill:#ce93d8

    class A,H,I normal
    class B,D,G,R therapeutic
    class K,L,M,N,O,P,Q pathology
    class S outcome
    class C,E,F,J molecular

graph TD
    A["Orexin neurons in
lateral hypothalamus
circadian dysregulation"] -->|"reduced signaling"| B["OX1R and OX2R
orexin receptors
decreased activation"]
    
    B -->|"targeted modulation"| C["Orexin receptor
antagonist therapy
suvorexant/lemborexant"]
    
    C -->|"promotes"| D["Enhanced sleep
consolidation and
NREM sleep stages"]
    
    D -->|"activates"| E["Noradrenergic locus
coeruleus suppression
during sleep"]
    
    E -->|"reduces"| F["Astrocytic AQP4
water channel
polarization enhanced"]
    
    F -->|"facilitates"| G["CSF influx along
periarterial spaces
Virchow-Robin spaces"]
    
    G -->|"drives"| H["CSF-ISF mixing
in brain parenchyma
convective flow"]
    
    H -->|"mobilizes"| I["Amyloid-beta and
tau protein aggregates
from interstitium"]
    
    I -->|"clearance via"| J["Perivenous drainage
pathways activated
during sleep"]
    
    J -->|"exits to"| K["Cervical lymphatic
vessels and
systemic circulation"]
    
    A -->|"disrupts"| L["Circadian clock genes
Per1/Per2/Clock/Bmal1
expression altered"]
    
    L -->|"affects"| M["Glymphatic system
circadian regulation
10-20 fold variance"]
    
    M -->|"impairs"| N["Sleep-dependent
protein aggregate
clearance capacity"]
    
    N -->|"leads to"| O["Alzheimer pathology
progression and
neurodegeneration"]
    
    K -->|"reduces"| P["Brain toxic protein
burden and
oxidative stress"]
    
    P -->|"slows"| Q["Cognitive decline
and memory
impairment"]
    
    D -->|"strengthens"| R["Circadian rhythm
restoration and
sleep architecture"]
    
    R -->|"enhances"| M
    
    O -->|"without treatment"| S["Progressive
neuronal loss
and dementia"]

    classDef normal fill:#4fc3f7,stroke:#2196f3
    classDef therapeutic fill:#81c784,stroke:#4caf50
    classDef pathology fill:#ef5350,stroke:#f44336
    classDef outcome fill:#ffd54f,stroke:#ff9800
    classDef molecular fill:#ce93d8,stroke:#9c27b0

    class A,B,F,L,M pathology
    class C,D,E therapeutic
    class G,H,I,J,K,P,R normal
    class N,O,S pathology
    class Q,S outcome
    class A,B,F,I molecular