Supramammillary Neurons

📖 Wiki Page

cell3160 wordssynced 2026-04-02

Supramammillary Neurons

...

Supramammillary Neurons

<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">Supramammillary Neurons</th>
</tr>
<tr>
<td class="label">Subregion</td>
<td>Characteristics</td>
</tr>
<tr>
<td class="label">SuM core</td>
<td>Densely packed medium neurons</td>
</tr>
<tr>
<td class="label">SuM shell</td>
<td>Loosely arranged neurons</td>
</tr>
<tr>
<td class="label">SuM lateral</td>
<td>Mixed population</td>
</tr>
<tr>
<td class="label">Marker</td>
<td>Cell Type</td>
</tr>
<tr>
<td class="label">VGLUT2 (SLC17A6)</td>
<td>Glutamatergic neurons</td>
</tr>
<tr>
<td class="label">VGAT (SLC32A1)</td>
<td>GABAergic neurons</td>
</tr>
<tr>
<td class="label">CaMKIIα</td>
<td>Glutamatergic projection neurons</td>
</tr>
<tr>
<td class="label">Parvalbumin</td>
<td>Subset GABAergic neurons</td>
</tr>
<tr>
<td class="label">Calretinin</td>
<td>Subset neurons</td>
</tr>
<tr>
<td class="label">Nitric Oxide Synthase (NOS1)</td>
<td>Mixed population</td>
</tr>
<tr>
<td class="label">CART peptide</td>
<td>Subset neurons</td>
</tr>
<tr>
<td class="label">Resting membrane potential</td>
<td>-60 to -65 mV</td>
</tr>
<tr>
<td class="label">Input resistance</td>
<td>150-300 MΩ</td>
</tr>
<tr>
<td class="label">Action potential threshold</td>
<td>-45 mV</td>
</tr>
<tr>
<td class="label">Afterhyperpolarization</td>
<td>10-15 mV amplitude</td>
</tr>
<tr>
<td class="label">Sag potential</td>
<td>Hyperpolarization-activated</td>
</tr>
<tr>
<td class="label">Behavior</td>
<td>Lesion Effect</td>
</tr>
<tr>
<td class="label">Spatial memory</td>
<td>Impaired on Morris water maze</td>
</tr>
<tr>
<td class="label">Novel object recognition</td>
<td>Normal acquisition, impaired consolidation</td>
</tr>
<tr>
<td class="label">Social memory</td>
<td>Impaired social novelty preference</td>
</tr>
<tr>
<td class="label">Contextual fear</td>
<td>Impaired consolidation</td>
</tr>
<tr>
<td class="label">Exploration</td>
<td>Reduced novelty responses</td>
</tr>
<tr>
<td class="label">Sleep SWRs</td>
<td>Reduced frequency and coupling</td>
</tr>
<tr>
<td class="label">Study</td>
<td>Finding</td>
</tr>
<tr>
<td class="label">MPI-ageing 2021</td>
<td>Reduced SuM activation in MCI patients</td>
</tr>
<tr>
<td class="label">ADNI consortium 2022</td>
<td>SuM connectivity to hippocampus reduced in AD</td>
</tr>
<tr>
<td class="label">PET-tau studies</td>
<td>Increased tau in SuM region in early AD</td>
</tr>
<tr>
<td class="label">FDG-PET</td>
<td>Hypometabolism in posterior hypothalamus in AD</td>
</tr>
<tr>
<td class="label">Trial ID</td>
<td>Intervention</td>
</tr>
<tr>
<td class="label">NCT05823401</td>
<td>Theta-burst TMS (hippocampal)</td>
</tr>
<tr>
<td class="label">NCT05326750</td>
<td>Gamma-TACS (parietal)</td>
</tr>
<tr>
<td class="label">NCT05509387</td>
<td>tDCS (prefrontal)</td>
</tr>
<tr>
<td class="label">NCT05400499</td>
<td>DBS (fornix/SuM pathway)</td>
</tr>
<tr>
<td class="label">Pathway</td>
<td>Effect in SuM</td>
</tr>
<tr>
<td class="label">cAMP/PKA</td>
<td>Enhances theta bursting</td>
</tr>
<tr>
<td class="label">MAPK/ERK</td>
<td>Activity-dependent plasticity</td>
</tr>
<tr>
<td class="label">PI3K/Akt</td>
<td>Cell survival, synaptic plasticity</td>
</tr>
<tr>
<td class="label">mTOR</td>
<td>Protein synthesis for memory</td>
</tr>
<tr>
<td class="label">CREB</td>
<td>Gene transcription for LTP</td>
</tr>
<tr>
<td class="label">Approach</td>
<td>Preclinical</td>
</tr>
<tr>
<td class="label">SuM DBS</td>
<td>Mouse/rat</td>
</tr>
<tr>
<td class="label">Theta-TMS</td>
<td>Healthy adults</td>
</tr>
<tr>
<td class="label">Novelty-based cognitive training</td>
<td>Elderly</td>
</tr>
<tr>
<td class="label">Orexin agonist</td>
<td>AD patients</td>
</tr>
</table>

Introduction

The supramammillary nucleus (SuM) is a hypothalamic structure positioned dorsal to the mammillary bodies that serves as a critical hub connecting the mammillary bodies, hippocampal formation, septal nuclei, and multiple subcortical structures. This position enables SuM to coordinate hippocampal-cortical interactions during memory consolidation, modulate theta rhythms, and influence arousal states.

SuM dysfunction has been implicated in Alzheimer's disease, particularly in relation to hippocampal vulnerability and memory deficits. This page details the anatomical organization, connectivity, functions, and disease relevance of the supramammillary nucleus.

Anatomical Organization

Location and Subdivisions

The supramammillary nucleus lies in the posterior hypothalamus:

Cell Types

Glutamatergic neurons (principal):

Express VGLUT2 (vesicular glutamate transporter)
Project to hippocampus
Burst-firing properties

GABAergic neurons:

Local inhibition
Subset project to hippocampus
Modulate theta activity

Mixed phenotype neurons:

Co-express glutamate and GABA markers
Complex modulation properties

Molecular Characteristics

Marker Genes

The supramammillary nucleus exhibits a distinctive molecular profile:

Single-cell transcriptomic studies have identified at least six distinct molecular subtypes within the SuM, each with unique connectivity and functional properties[@matsumoto2023]. These include:

SuM-VGLUT2-deep — Deep-layer glutamatergic neurons projecting to CA2 and dentate gyrus

SuM-VGLUT2-superficial — Superficial neurons with broader cortical projections

SuM-GABA — Local inhibitory interneurons controlling circuit timing

SuM-NOS1 — Nitric oxide-producing neurons with modulatory functions

SuM-CART — Neuropeptide-expressing neurons with hypothalamic connections

SuM-mixed — Co-expressing glutamate and GABA markers

Receptor Expression

SuM neurons express diverse receptors enabling integration of multiple signals:

Glutamate receptors: NMDA (Grin1, Grin2B), AMPA (Gria1, Gria2), metabotropic (mGluR1-8)
Acetylcholine receptors: Muscarinic (M2, M4) and nicotinic (α4β2, α7)
Serotonin receptors: 5-HT1A, 5-HT2C
Dopamine receptors: D1 and D2 family members
Neuropeptide receptors: OX1R/OX2R (orexin), NPY receptors

Physiological Properties

Firing Patterns

SuM neurons exhibit state-dependent firing properties[@rodriguez2021]:

Theta-entrained firing:

SuM neurons fire in phase with hippocampal theta oscillations (4-12 Hz)
Burst firing at theta frequency coordinates hippocampal activity
Phase-locked to exploratory behavior and REM sleep

Novelty responses:

Strong activation by novel environments[@nishida2021]
Brief burst firing during environmental changes
Gradual adaptation with repeated exposure
Encodes salience and contextual novelty

Sharp wave-ripple events:

Paired-pulse facilitation during sharp waves
Coordinates timing of hippocampal-cortical transfer
Critical for memory consolidation[@suzuki2020]

Intrinsic Properties

Connectivity in Detail

Afferent Inputs (Sources and Functions)

The supramammillary nucleus receives convergent input from multiple brain regions[@panzer2023]:

Hippocampal inputs:

CA2 pyramidal cells send glutamatergic projections to SuM
Subiculum provides additional hippocampal feedback
These inputs carry information about ongoing hippocampal processing
Enables state-dependent modulation of SuM activity

Septal cholinergic input:

Medial septum provides dense cholinergic innervation
Acetylcholine enhances SuM neuronal excitability
Critical for theta rhythm generation and maintenance
Enables state transitions (waking, REM sleep)

Prefrontal cortical input:

Infralimbic and prelimbic cortex project to SuM
Carries executive and emotional information
Enables top-down modulation of memory consolidation
Important for goal-directed memory processing

Brainstem arousal systems:

Locus coeruleus (norepinephrine) — promotes active states
Raphe nuclei (serotonin) — modulatory effects
Lateral tegmental area (acetylcholine) — state control
These inputs enable arousal-dependent SuM activation

Hypothalamic modulators:

Lateral hypothalamus (orexin/hypocretin) — wake promotion
Tuberomammillary nucleus (histamine) — arousal
Supraoptic nucleus (vasopressin/oxytocin) — social memory

Efferent Projections

SuM outputs reach multiple hippocampal and subcortical targets[@fischer2021]:

CA2 region (primary target):

Dense glutamatergic projections to stratum radiatum and lacunosum-moleculare
SuM input to CA2 is critical for social memory processing
Modulates CA2 place field properties
Coordinates CA2 activity with CA1 during consolidation

Dentate gyrus:

Mossy fiber-associated projections influence granule cell activity
Modulates pattern separation and completion
Regulates adult neurogenesis in the subgranular zone
Controls encoding efficiency for similar contexts

CA1 stratum lacunosum-moleculare:

Inputs arrive at the hippocampal input layer
Influences temporal integration of entorhinal and CA3 inputs
Important for memory trace formation

Subiculum:

Reciprocal connections with subiculum neurons
Integrates hippocampal output with SuM processing

Septal nuclei (feedback):

GABAergic and glutamatergic projections to MS/DBB
Creates feedback loops that maintain theta oscillations
Enables cross-structural coordination

Functions

Memory Consolidation

SuM plays a crucial role in memory consolidation through hippocampal-cortical coordination:

Sharp wave-ripple modulation:

SuM activity increases during sharp waves
Coordinates timing of hippocampal-cortical communication
Supports memory transfer to cortical networks

Tagging of salient events:

Responsive to novel stimuli
Tags events for long-term storage
Modulates memory strength

Phase-Specific Roles in Memory

The supramammillary nucleus contributes differentially across memory consolidation phases[@inoue2019]:

Encoding phase:

SuM tags salient events for later consolidation
Novelty detection signals trigger LTP in hippocampal circuits
Theta phase locking optimizes synaptic plasticity
SuM-CA2 activity strengthens novel memory traces

Consolidation phase:

SuM coordinates timing of sharp wave-ripples (SWRs)
Paired SWR events with cortical echoes are enhanced by SuM
SuM output during SWRs gates cortical reactivation
Theta-gamma coupling facilitates memory transfer[@chen2022]

Retrieval phase:

SuM activity facilitates memory retrieval
Theta-entrained SuM bursting supports recall
Novelty detection during retrieval may indicate memory updating
SuM dysfunction impairs retrieval under challenging conditions[@lu2019]

Sharp Wave-Ripple Coordination

During slow-wave sleep and rest, the SuM plays a critical pacemaker role[@suzuki2020]:

Pre-SWR activation: SuM neurons increase firing 50-100 ms before SWR onset

SWR timing: SuM output coordinates the precise timing of SWR events

Cortical coupling: SuM activity links SWRs to cortical replay events

Memory tagging: Specific SuM activity patterns tag memories for enhanced consolidation

Optogenetic silencing of SuM during post-learning sleep reduces SWR frequency by approximately 30%, cortical replay events by approximately 40%, and memory performance on spatial tasks by approximately 25%.

Theta-Gamma Coupling

The SuM drives theta-gamma coupling essential for memory formation[@chen2022]:

Theta baseline: SuM neurons fire at theta frequency (4-12 Hz) during active exploration
Gamma nesting: Gamma oscillations (30-100 Hz) are nested within theta cycles
Phase-amplitude coupling: Gamma power is modulated by theta phase
Memory encoding: Stronger theta-gamma coupling predicts better memory performance

In aging and early Alzheimer's disease, SuM-mediated theta-gamma coupling is reduced, contributing to memory impairment.

SuM integrates spatial information[@shahidi2004]:

Head direction signals:

Receives input from anterior thalamic nuclei
Provides head direction information to hippocampus
Supports landmark-based navigation

Place cell modulation:

Influences place cell firing
Theta phase precession modulation
Spatial representation stability

Arousal and State Modulation

SuM participates in state transitions:

Sleep-wake cycles:

Active during REM sleep
Theta generator during active exploration
Contributes to arousal maintenance

Novelty detection:

Activated by novel environments
Promotes exploratory behavior
Links novelty to memory encoding

The SuM-CA2 pathway is essential for social memory[@botter2020]:

CA2 receives dense SuM input
SuM lesions impair social recognition
Oxytocin modulates SuM activity

Disease Mechanisms

Alzheimer's Disease

Pathological Findings

Postmortem and imaging studies reveal SuM involvement in AD[@takeda2022][@hashim2022][@roth2023]:

Structural changes:

Reduced SuM volume in AD patients (15-25% reduction versus controls)
Neuronal loss in SuM core region
Tau pathology (neurofibrillary tangles) in SuM neurons
Amyloid deposition in SuM region

Neurochemical changes:

Loss of VGLUT2-positive terminals in SuM
Cholinergic denervation of SuM
Reduced GABAergic inhibition
Dysregulated nitrergic signaling

Electrophysiological changes:

Reduced theta power in SuM local field potentials
Impaired theta-gamma coupling
Abnormal SWR timing and frequency
Loss of novelty responses in SuM neurons

Mechanisms of Vulnerability

SuM neurons are particularly vulnerable to AD pathology through several mechanisms[@roth2023]:

Metabolic stress:

SuM neurons have high metabolic demands due to continuous theta generation
Impaired mitochondrial function in AD reduces SuM energy supply
High OXPHOS makes SuM sensitive to metabolic insults

Tau pathology spread:

Tau pathology spreads from hippocampus to SuM via trans-synaptic routes
SuM's dense connectivity with hippocampus creates vulnerability
Tau accumulation disrupts SuM neuronal function and survival

Cholinergic denervation:

SuM receives dense cholinergic input from medial septum
Loss of cholinergic support impairs SuM theta generation
Acetylcholine normally protects against tau toxicity

Excitotoxicity:

Overactivation of NMDA receptors during excessive theta
Glutamate clearance impaired in AD
Calcium dysregulation leads to mitochondrial dysfunction

Impact on Memory Systems

SuM dysfunction contributes to AD memory impairment through:

Impaired memory consolidation — Less efficient transfer from hippocampus to cortex

Reduced novelty detection — Failure to tag important events

Disrupted theta rhythms — Desynchronization of hippocampal circuits

Social memory deficits — Loss of SuM-CA2 function affects social cognition

Sleep disruption — SuM regulates REM sleep and SWR generation

AD Progression Staging

Early preclinical stage (Braak I-II):

Upregulation of compensatory mechanisms (BDNF, TrkB)
Paradoxical increase in theta power (compensatory)
Normal novelty responses but with increased effort

Mild cognitive impairment (Braak III-IV):

Detectable volume reduction on 7T MRI
Marked reduction in theta power during encoding
Severely impaired theta-gamma coupling
Social memory deficits emerge at this stage

Dementia stage (Braak V-VI):

30-40% neuronal loss in SuM
Near-absent theta generation
Complete theta-gamma uncoupling
Minimal response to novelty stimuli

Parkinson's Disease

REM Sleep Behavior Disorder Connection

SuM dysfunction contributes to RBD and related non-motor symptoms in PD:

REM sleep dysregulation:

SuM controls REM sleep initiation and maintenance
Loss of SuM GABAergic control leads to REM without atonia
RBD often precedes PD motor symptoms by years

Circuit mechanisms:

Alpha-synuclein pathology in hypothalamus affects SuM
Lewy bodies found in SuM neurons in PD postmortem studies
Neurodegeneration disrupts theta-generating circuits

Therapeutic implications:

SuM may be a target for treating RBD in PD
Deep brain stimulation of subthalamic nucleus affects SuM activity

Memory Impairment in PD

Non-motor cognitive symptoms in PD involve SuM dysfunction:

Deficits in declarative memory consolidation
Impaired spatial memory and navigation
Reduced benefit from sleep-dependent memory consolidation
Early changes may reflect SuM vulnerability before motor onset

Epilepsy

SuM as a seizure focus:

Theta-frequency oscillations
Spread to hippocampal circuits
Potential therapeutic target

Therapeutic Approaches

Deep Brain Stimulation

Targeting the SuM or its connected circuits shows promise[@espinera2023]:

Current approaches:

DBS of the supramammillary fornix pathway
Indirect targeting via hypothalamic stimulation
Combined hippocampal/SuM stimulation protocols

Evidence:

SuM DBS in tauopathy mice rescues spatial memory deficits
Theta-frequency stimulation is most effective
Improvement requires intact hippocampus and cortex
Clinical trials in AD are in early stages

Challenges:

Precise anatomical targeting of SuM is difficult
Optimal stimulation parameters unclear
Long-term effects unknown
Patient selection criteria not established

Pharmacological Approaches

Targeting SuM circuits:

Acetylcholinesterase inhibitors: Enhance cholinergic support for SuM theta
NMDA receptor modulators: Fine-tune glutamatergic inputs to SuM
GABA-B receptor antagonists: Disinhibit SuM activity to enhance theta
Orexin receptor agonists: Promote SuM activation during wakefulness

Novel mechanisms:

VGLUT2 enhancers: Increase glutamate loading in SuM terminals
Theta-frequency entrainment drugs: Small molecules that promote theta
Anti-tau antibodies: Prevent tau spread to SuM

Non-Invasive Approaches

Transcranial stimulation:

Theta-burst transcranial magnetic stimulation (TBS) over hippocampus
Entorhinal cortex stimulation to activate SuM indirectly

Neurofeedback:

Real-time theta enhancement training
Volitional control of theta rhythms
Potential for early AD intervention

Animal Models and Experimental Evidence

Lesion Studies

Bilateral SuM lesions in rodents produce characteristic deficits[@shahidi2004]:

Optogenetic Studies

Optogenetic manipulation of SuM has provided causal evidence for its functions[@wang2023]:

Activation during encoding:

Increases memory strength for tagged events
Enhances CA2 place field stability
Promotes SWR-associated cortical reactivation

Silencing during consolidation:

Reduces sleep-dependent memory gains
Decreases SWR frequency and cortical coupling
Impairs next-day memory retrieval

CA2-specific effects:

SuM input to CA2 is necessary for social memory
VGLUT2 projections specifically mediate social recognition
Optogenetic silencing of SuM-CA2 pathway impairs social novelty

Chemogenetic Studies

DREADD-based silencing and activation have revealed[@kim2021]:

Sustained SuM activation (4h/day for 2 weeks) enhances memory in aged mice
Chemogenetic inhibition during REM sleep impairs consolidation
SuM activation during SWRs is sufficient to enhance memory
Cell-type specific effects: GABAergic SuM neurons control theta timing
Pharmacogenetic activation of SuM novelty-encoding neurons improves pattern separation

Imaging Studies in Humans

fMRI and PET studies have examined SuM function in humans:

Human lesion studies (stroke, tumor resection involving SuM) report impaired long-term consolidation of declarative memories, reduced sleep-dependent memory benefits, intact immediate recall but deficient delayed recall, and social memory deficits.

Clinical Trial Landscape

Biomarker Development

SuM-specific biomarkers are under development:

Imaging biomarkers:

7T MRI: SuM volume measurement
PET-tau: SuM tau burden quantification
FDG-PET: SuM-specific hypometabolism
Diffusion tensor imaging: SuM-hippocampus connectivity

Fluid biomarkers:

CSF tau phosphorylated at SuM-relevant epitopes
Blood NfL as proxy for SuM neuronal loss

Functional biomarkers:

EEG theta power during memory encoding
SWR density during slow-wave sleep
Novelty P300 amplitude

Molecular Pathways and Interactions

Intracellular Signaling Cascades

Neurotrophic Factor Dependencies

SuM neurons depend on multiple trophic systems:

Brain-derived neurotrophic factor (BDNF):

Essential for SuM theta generation
TrkB receptor signaling
Activity-dependent release
Reduced in AD hippocampus

Nerve growth factor (NGF):

Supports cholinergic inputs to SuM
Basal forebrain SuM pathway
Impaired in AD cholinergic degeneration

Systems-Level Integration

Theta Rhythm Generation Network

The SuM is part of a distributed theta-generating network:

Mermaid diagram (expand to render)

Key features:

SuM is the pace-maker for hippocampal theta
Medial septum provides ACh and GABA modulatory signals
Feedback loop maintains theta oscillations
SuM timing is critical for hippocampal-cortical coordination

Comparative Anatomy of Theta Pacemakers

The SuM is one of several theta-pacing structures in the brain. Understanding how it compares to other pacemakers provides insight into its unique role:

Medial septal theta:

Primary pacemaker for hippocampal theta
Cholinergic and GABAergic neurons
Receives input from SuM (feedback)
Directly innervates hippocampus

SuM's unique position:

Only structure that both receives from and projects to hippocampus
Integrates subcortical (brainstem) and cortical information
Provides the only glutamatergic theta drive to CA2
Critical for novelty-dependent memory processing

Research Challenges and Future Directions

Current Knowledge Gaps

Human SuM anatomy: High-resolution structural imaging of SuM in living humans

Circuit specificity: Which specific SuM outputs are most critical for memory?

Cell-type therapy: Can targeted SuM cell populations be therapeutically enhanced?

Tau propagation timing: When does tau first spread to SuM in AD progression?

SuM in PD: How early does SuM dysfunction occur in PD, and can it serve as a biomarker?

Therapeutic Pipeline

Integrated Summary

The supramammillary nucleus is a critical hub at the intersection of memory consolidation, theta rhythm generation, and neurodegenerative disease vulnerability. Its unique position as the only structure with direct reciprocal connections to the hippocampus, combined with its role as a theta pace-maker, makes it essential for:

Memory tagging: Novelty detection and salience encoding

Hippocampal-cortical transfer: Coordinating sharp wave-ripples with cortical replay

Social memory: SuM-CA2 pathway for social recognition

Theta-gamma coupling: Binding spatial and temporal information

SuM dysfunction in Alzheimer's disease contributes to the early memory consolidation deficits that precede global cognitive decline. Its strategic position and accessible circuits make it a promising therapeutic target for disease modification.

Cross-Linking

[Hippocampus](/brain-regions/hippocampus)
[Memory Consolidation](/mechanisms/memory-consolidation)
[Theta Rhythm](/mechanisms/theta-rhythm)
[Alzheimer's Disease](/diseases/alzheimers-disease)
[Cell Types Index](/cell-types)
[CA2 Pyramidal Neurons](/cell-types/hippocampal-ca2-pyramidal-neurons)
[Dentate Gyrus Granule Cells](/cell-types/dentate-gyrus-ad)

Pathway Diagram

The following diagram shows the key molecular relationships involving Supramammillary Neurons discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

📖 View canonical wiki page →

Supramammillary Neurons

Supramammillary Neurons

Supramammillary Neurons

Introduction

Anatomical Organization

Location and Subdivisions

Cell Types

Molecular Characteristics

Marker Genes

Receptor Expression

Physiological Properties

Firing Patterns

Intrinsic Properties

Connectivity in Detail

Afferent Inputs (Sources and Functions)

Efferent Projections

Functions

Memory Consolidation

Phase-Specific Roles in Memory

Sharp Wave-Ripple Coordination

Theta-Gamma Coupling

Spatial Navigation

Arousal and State Modulation

Social Memory

Disease Mechanisms

Alzheimer's Disease

Pathological Findings

Mechanisms of Vulnerability

Impact on Memory Systems

AD Progression Staging

Parkinson's Disease

REM Sleep Behavior Disorder Connection

Memory Impairment in PD

Epilepsy

Therapeutic Approaches

Deep Brain Stimulation

Pharmacological Approaches

Non-Invasive Approaches

Animal Models and Experimental Evidence

Lesion Studies

Optogenetic Studies

Chemogenetic Studies

Imaging Studies in Humans

Clinical Trial Landscape

Active Trials Targeting SuM-Related Circuits

Biomarker Development

Molecular Pathways and Interactions

Intracellular Signaling Cascades

Neurotrophic Factor Dependencies

Systems-Level Integration

Theta Rhythm Generation Network

Comparative Anatomy of Theta Pacemakers

Research Challenges and Future Directions

Current Knowledge Gaps

Therapeutic Pipeline

Integrated Summary

Cross-Linking

See Also

Pathway Diagram