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The Schlemm’s canal is a VEGF-C/VEGFR-3–responsive lymphatic-like vessel

Identifieur interne : 002437 ( Main/Exploration ); précédent : 002436; suivant : 002438

The Schlemm’s canal is a VEGF-C/VEGFR-3–responsive lymphatic-like vessel

Auteurs : Aleksanteri Aspelund [Finlande] ; Tuomas Tammela [Finlande] ; Salli Antila [Finlande] ; Harri Nurmi [Finlande] ; Veli-Matti Lepp Nen [Finlande] ; Georgia Zarkada [Finlande] ; Lukas Stanczuk [Suède] ; Mathias Francois [Australie] ; Taija M Kinen [Suède] ; Pipsa Saharinen [Finlande] ; Ilkka Immonen [Finlande] ; Kari Alitalo [Finlande]

Source :

RBID : PMC:4153703

Abstract

In glaucoma, aqueous outflow into the Schlemm’s canal (SC) is obstructed. Despite striking structural and functional similarities with the lymphatic vascular system, it is unknown whether the SC is a blood or lymphatic vessel. Here, we demonstrated the expression of lymphatic endothelial cell markers by the SC in murine and zebrafish models as well as in human eye tissue. The initial stages of SC development involved induction of the transcription factor PROX1 and the lymphangiogenic receptor tyrosine kinase VEGFR-3 in venous endothelial cells in postnatal mice. Using gene deletion and function-blocking antibodies in mice, we determined that the lymphangiogenic growth factor VEGF-C and its receptor, VEGFR-3, are essential for SC development. Delivery of VEGF-C into the adult eye resulted in sprouting, proliferation, and growth of SC endothelial cells, whereas VEGF-A obliterated the aqueous outflow system. Furthermore, a single injection of recombinant VEGF-C induced SC growth and was associated with trend toward a sustained decrease in intraocular pressure in adult mice. These results reveal the evolutionary conservation of the lymphatic-like phenotype of the SC, implicate VEGF-C and VEGFR-3 as critical regulators of SC lymphangiogenesis, and provide a basis for further studies on therapeutic manipulation of the SC with VEGF-C in glaucoma treatment.


Url:
DOI: 10.1172/JCI75395
PubMed: 25061878
PubMed Central: 4153703


Affiliations:


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Le document en format XML

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<p>In glaucoma, aqueous outflow into the Schlemm’s canal (SC) is obstructed. Despite striking structural and functional similarities with the lymphatic vascular system, it is unknown whether the SC is a blood or lymphatic vessel. Here, we demonstrated the expression of lymphatic endothelial cell markers by the SC in murine and zebrafish models as well as in human eye tissue. The initial stages of SC development involved induction of the transcription factor PROX1 and the lymphangiogenic receptor tyrosine kinase VEGFR-3 in venous endothelial cells in postnatal mice. Using gene deletion and function-blocking antibodies in mice, we determined that the lymphangiogenic growth factor VEGF-C and its receptor, VEGFR-3, are essential for SC development. Delivery of VEGF-C into the adult eye resulted in sprouting, proliferation, and growth of SC endothelial cells, whereas VEGF-A obliterated the aqueous outflow system. Furthermore, a single injection of recombinant VEGF-C induced SC growth and was associated with trend toward a sustained decrease in intraocular pressure in adult mice. These results reveal the evolutionary conservation of the lymphatic-like phenotype of the SC, implicate VEGF-C and VEGFR-3 as critical regulators of SC lymphangiogenesis, and provide a basis for further studies on therapeutic manipulation of the SC with VEGF-C in glaucoma treatment.</p>
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<name sortKey="Saharinen, Pipsa" sort="Saharinen, Pipsa" uniqKey="Saharinen P" first="Pipsa" last="Saharinen">Pipsa Saharinen</name>
<name sortKey="Tammela, Tuomas" sort="Tammela, Tuomas" uniqKey="Tammela T" first="Tuomas" last="Tammela">Tuomas Tammela</name>
<name sortKey="Zarkada, Georgia" sort="Zarkada, Georgia" uniqKey="Zarkada G" first="Georgia" last="Zarkada">Georgia Zarkada</name>
</country>
<country name="Suède">
<noRegion>
<name sortKey="Stanczuk, Lukas" sort="Stanczuk, Lukas" uniqKey="Stanczuk L" first="Lukas" last="Stanczuk">Lukas Stanczuk</name>
</noRegion>
<name sortKey="M Kinen, Taija" sort="M Kinen, Taija" uniqKey="M Kinen T" first="Taija" last="M Kinen">Taija M Kinen</name>
</country>
<country name="Australie">
<noRegion>
<name sortKey="Francois, Mathias" sort="Francois, Mathias" uniqKey="Francois M" first="Mathias" last="Francois">Mathias Francois</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Wicri/Sante/explor/LymphedemaV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 002437 | SxmlIndent | more

Ou

HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 002437 | SxmlIndent | more

Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Wicri/Sante
   |area=    LymphedemaV1
   |flux=    Main
   |étape=   Exploration
   |type=    RBID
   |clé=     PMC:4153703
   |texte=   The Schlemm’s canal is a VEGF-C/VEGFR-3–responsive
lymphatic-like vessel
}}

Pour générer des pages wiki

HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Exploration/RBID.i   -Sk "pubmed:25061878" \
       | HfdSelect -Kh $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd   \
       | NlmPubMed2Wicri -a LymphedemaV1 

Wicri

This area was generated with Dilib version V0.6.31.
Data generation: Sat Nov 4 17:40:35 2017. Site generation: Tue Feb 13 16:42:16 2024