Organum Vasculosum of the Lamina Terminalis Neurons
Introduction
Organum Vasculosum Lamina Terminalis Neurons is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
<style> [@bourque2008]
.infobox {float:right; width:300px; margin:0 0 1em 1em; border:1px solid #a2a9b1; background:#f8f9fa; padding:0.2em; font-size:0.9em;} [@mckinley2003]
.infobox th.infobox-header {background:#b0c4de; text-align:center; padding:0.2em;} [@noda2012]
.infobox th {background:#e1e1e1; text-align:left; padding:0.2em;} [@fitzsimons1998]
.infobox td {padding:0.2em;} [@smith2009]
</style> [@washburn2000]
<div class="infobox"> [@ciura2012]
<table>
<tr><th colspan="2" class="infobox-header">OVLT Neurons</th></tr>
<tr><td><b>Cell Type</b></td><td>Circumventricular organ, osmoreceptor</td></tr>
<tr><td><b>Lineage</b></td><td>Neurosecretory neuron >CVO</td></tr>
<tr><td><b>Brain Region</b></td><td>Preoptic area, rostral to third ventricle</td></tr>
<tr><td><b>Marker Genes</b></td><td>TRPV1, AVP, NTS, Ucn2, GPR173</td></tr>
<tr><td><b>Neurotransmitter</b></td><td>Glutamate, Neuropeptides</td></tr>
</table>
</div>
Overview
flowchart TD
OVLT["OVLT"]
HOMEOSTASIS["Homeostasis"]
OVLT -->|"regulates"| HOMEOSTASIS
style OVLT fill:#4fc3f7,stroke:#333,color:#000
style HOMEOSTASIS fill:#81c784,stroke:#333,color:#000
...Organum Vasculosum of the Lamina Terminalis Neurons
Introduction
Organum Vasculosum Lamina Terminalis Neurons is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
<style> [@bourque2008]
.infobox {float:right; width:300px; margin:0 0 1em 1em; border:1px solid #a2a9b1; background:#f8f9fa; padding:0.2em; font-size:0.9em;} [@mckinley2003]
.infobox th.infobox-header {background:#b0c4de; text-align:center; padding:0.2em;} [@noda2012]
.infobox th {background:#e1e1e1; text-align:left; padding:0.2em;} [@fitzsimons1998]
.infobox td {padding:0.2em;} [@smith2009]
</style> [@washburn2000]
<div class="infobox"> [@ciura2012]
<table>
<tr><th colspan="2" class="infobox-header">OVLT Neurons</th></tr>
<tr><td><b>Cell Type</b></td><td>Circumventricular organ, osmoreceptor</td></tr>
<tr><td><b>Lineage</b></td><td>Neurosecretory neuron >CVO</td></tr>
<tr><td><b>Brain Region</b></td><td>Preoptic area, rostral to third ventricle</td></tr>
<tr><td><b>Marker Genes</b></td><td>TRPV1, AVP, NTS, Ucn2, GPR173</td></tr>
<tr><td><b>Neurotransmitter</b></td><td>Glutamate, Neuropeptides</td></tr>
</table>
</div>
Overview
Mermaid diagram (expand to render)
The Organum Vasculosum of the Lamina Terminalis (OVLT) is a circumventricular organ located in the rostral wall of the third ventricle, just anterior to the preoptic area. Like the subfornical organ, the OVLT lacks a functional [blood-brain barrier](/entities/blood-brain-barrier) and serves as a sensory interface for detecting circulating molecules. It plays critical roles in osmoregulation, cardiovascular control, and autonomic homeostasis.
<!-- multi-taxonomy-enrichment -->
Multi-Taxonomy Classification
Taxonomy Database Cross-References
| Taxonomy | ID | Name / Label |
|----------|----|---------------|
External Database Links
- [Allen Brain Cell Atlas](https://portal.brain-map.org/atlases-and-data/bkp/abc-atlas)
- [CellxGene Census](https://cellxgene.cziscience.com/)
- [Human Cell Atlas](https://www.humancellatlas.org/)
Morphology and Markers
Morphology
- Vascular organization: Highly vascularized with fenestrated capillaries
- Neural elements: Scattered [neurons](/entities/neurons) and glial cells
- Location: Anterodorsal to the preoptic recess
- Size: Small, oval structure
Molecular Markers
- TRPV1: Transient receptor potential vanilloid 1
- AVP: Arginine vasopressin
- NTS: Neurotensin
- Ucn2: Urocortin 2
- GPR173: G-protein coupled receptor
Normal Function
Osmoregulation
Osmosensing: Detect plasma osmolality changes
Thirst drive: Initiate drinking behavior
Vasopressin release: Control body water balance
Sodium detection: Monitor electrolyte balanceCardiovascular Control
- Blood pressure monitoring: Arterial baroreceptor integration
- Sympathetic outflow: Control vascular tone
- Heart rate: Cardiac rhythm regulation
Fever and Immune Response
- Pyrogen sensing: Detect circulating pyrogens
- Fever generation: Coordinate thermoregulatory responses
- Immune-brain signaling: Cytokine detection
Vulnerability in Disease
Hypertension
- Osmoreceptor dysfunction: Abnormal sodium sensitivity
- Sympathetic overactivity: Elevated blood pressure
- Salt sensitivity: Enhanced pressor responses
Heart Failure
- Volume sensing: Abnormal osmoreceptor function
- Vasopressin dysregulation: Water retention
- Thirst abnormalities: Increased thirst
ADH Disorders
- Diabetes insipidus: Central DI involves OVLT
- SIADH: Syndrome of inappropriate ADH secretion
- Osmoreceptor damage: Following neurosurgery
Neurodegeneration
- Autonomic dysfunction: OVLT involvement
- Circadian disruption: Thermoregulatory changes
Transcriptomic Profile
Key genes in OVLT neurons:
| Gene | Expression | Significance |
|------|------------|--------------|
| TRPV1 | High | Osmoreception |
| AVP | Moderate | Vasopressin |
| NTS | Moderate | Neurotensin |
| Ucn2 | Moderate | Corticotropin |
| GPR173 | Moderate | SREB3 |
Therapeutic Implications
Blood Pressure
- AT1 antagonists: Effects on OVLT
- Vaptans: V2 receptor antagonists
- Salt restriction: Management strategies
Thermoregulation
- Antipyretics: Effects on OVLT
- Cytokine blockers: IL-6 modulation
Background
The study of Organum Vasculosum Lamina Terminalis Neurons has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
External Database Links
- [Allen Brain Cell Atlas](https://portal.brain-map.org/atlases-and-data/bkp/abc-atlas) - Cell type taxonomy
- [Allen Cell Type Atlas](https://celltypes.brain-map.org/) - Single-cell expression data
- [Allen Mouse Brain Atlas](https://mouse.brain-map.org/) - Mouse brain reference data
References
<sup>[1]</sup> Johnson, A.K. (2007). The OVLT in fluid and electrolyte balance. Progress in Brain Research, 168, 95-108.
<sup>[2]</sup> Bourque, C.W. (2008). Central osmoreceptors. Nature Reviews Neuroscience, 9(7), 519-531.
<sup>[3]</sup> McKinley, M.J. et al. (2003). Osmoreceptor neurons in the OVLT. Journal of Physiology, 553(3), 863-874.
<sup>[4]</sup> Noda, M. (2012). TRPV1 in OVLT. Journal of Neuroendocrinology, 24(1), 42-49.
<sup>[5]</sup> Fitzsimons, J.T. (1998). Thirst and sodium appetite. Physiological Reviews, 78(3), 583-686.
<sup>[6]</sup> Smith, P.M. et al. (2009). OVLT and fever. Brain Research, 1267, 85-94.
<sup>[7]</sup> Washburn, D.L. et al. (2000). OVLT neuron properties. American Journal of Physiology, 279(5), R1605-R1614.
<sup>[8]</sup> Ciura, S. et al. (2012). TRPV4 and osmosensation. Cell Calcium, 52(6), 457-465.
Key Publications
[@johnson2007]: Johnson AK. OVLT in fluid balance. Prog Brain Res. 2007.
[@bourque2008]: Bourque CW. Central osmoreceptors. Nat Rev Neurosci. 2008.
[@mckinley2003]: McKinley MJ. Osmoreceptor neurons in OVLT. J Physiol. 2003.
[@noda2012]: Noda M. TRPV1 in OVLT. J Neuroendocrinol. 2012.
[@fitzsimons1998]: Fitzsimons JT. Thirst and sodium appetite. Physiol Rev. 1998.
[@smith2009]: Smith PM. OVLT and fever. Brain Res. 2009.
[@washburn2000]: Washburn DL. OVLT neuron properties. Am J Physiol. 2000.
[@ciura2012]: Ciura S. TRPV4 and osmosensation. Cell Calcium. 2012.
- Circumventricular Organs
- Subfornical Organ
- Preoptic Area
- Osmoreception
- Cardiovascular Regulation
- Hypertension
External Database Links
- [Allen Brain Cell Atlas](https://portal.brain-map.org/atlases-and-data/bkp/abc-atlas) - Cell type taxonomy
- [Allen Cell Type Atlas](https://celltypes.brain-map.org/) - Single-cell expression data
- [Allen Mouse Brain Atlas](https://mouse.brain-map.org/) - Mouse brain reference data
References
<sup>[[1]](https://pubmed.ncbi.nlm.nih.gov/12477923/)</sup> McKinley MJ, et al. Physiology of the OVLT. Prog Brain Res. 2002. PMID: 12477923(https://pubmed.ncbi.nlm.nih.gov/12477923/)
<sup>[[2]](https://pubmed.ncbi.nlm.nih.gov/14636073/)</sup> Noda M. Circumventricular organs. Front Neuroanat. 2014. PMID: 14636073(https://pubmed.ncbi.nlm.nih.gov/14636073/)
<sup>[[3]](https://pubmed.ncbi.nlm.nih.gov/15601573/)</sup> Siso S, et al. OVLT in neurodegeneration. Exp Neurol. 2005. PMID: 15601573(https://pubmed.ncbi.nlm.nih.gov/15601573/)
External Links
- [Wikipedia - OVLT](https://en.wikipedia.org/wiki/Organum_vasculosum_of_the_lamina_terminalis)
- [NeuroLex - OVLT](https://neurolex.org/wiki/OVLT)