Angiopoietin 1

Last updated
ANGPT1
Available structures
PDB Ortholog search: PDBe RCSB
Identifiers
Aliases ANGPT1 , AGP1, AGPT, ANG1, angiopoietin 1, HAE5, AGPT-1
External IDs OMIM: 601667 MGI: 108448 HomoloGene: 37447 GeneCards: ANGPT1
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_001146
NM_001199859
NM_001314051
NM_139290

NM_009640
NM_001286062

RefSeq (protein)

NP_001137
NP_001186788
NP_001300980

NP_001272991
NP_033770

Location (UCSC) Chr 8: 107.25 – 107.5 Mb Chr 15: 42.29 – 42.54 Mb
PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

Angiopoietin 1 is a type of angiopoietin and is encoded by the gene ANGPT1.

Contents

Angiopoietins are proteins with important roles in vascular development and angiogenesis. All angiopoietins bind with similar affinity to an endothelial cell-specific tyrosine-protein kinase receptor. The protein encoded by this gene is a secreted glycoprotein that activates the receptor by inducing its tyrosine phosphorylation. It plays a critical role in mediating reciprocal interactions between the endothelium and surrounding matrix and mesenchyme. The protein also contributes to blood vessel maturation and stability, and may be involved in early development of the heart. [5] During pregnancy, angiopoietins act complementary to the VEGF system and contribute to endothelial cell survival and the remodeling of vessels. Few studies have examined the role of angiopoietins in human pregnancy complications like preeclampsia and intrauterine growth restriction (IUGR).

A knockout model of ANGPT1 was introduced in mice embryos. Results showed that embryos began to appear abnormal by day 11 and were dead by day 12.5 of pregnancy. The embryos showed prominent defects in endocardial and myocardial development as well as a less complex vascular network.

[6] [7]

Interactions

Angiopoietin 1 has been shown to interact with TEK tyrosine kinase. [8] [9] [10] [11]

Placental Malaria

Recently, studies in malaria-endemic areas suggest that placental malaria (PM) may be associated with a dysregulation in angiopoietins. Increased levels of angiopoietin-1 appear to be associated with a decrease in placental weight and placental barrier thickness in women infected with Plasmodium (the causative agent of malaria). [12] In a mouse model of PM, Plasmodium infection of pregnant mice led to decreased angiopoietin-1, increased angiopoietin-2, and an elevated ratio of angiopoietin-2/angiopoietin-1 in the placenta. [13] This suggests that angiopoietin levels could be clinically significant biomarkers to identify mothers infected with PM.

See also

Related Research Articles

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<span class="mw-page-title-main">Angiopoietin</span> Protein family

Angiopoietin is part of a family of vascular growth factors that play a role in embryonic and postnatal angiogenesis. Angiopoietin signaling most directly corresponds with angiogenesis, the process by which new arteries and veins form from preexisting blood vessels. Angiogenesis proceeds through sprouting, endothelial cell migration, proliferation, and vessel destabilization and stabilization. They are responsible for assembling and disassembling the endothelial lining of blood vessels. Angiopoietin cytokines are involved with controlling microvascular permeability, vasodilation, and vasoconstriction by signaling smooth muscle cells surrounding vessels. There are now four identified angiopoietins: ANGPT1, ANGPT2, ANGPTL3, ANGPT4.

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The angiopoietin receptors are receptors that bind angiopoietin. TIE-1 and TIE-2 comprise the cell-surface receptors that bind and are activated by the angiopoietins,. The angiopoietins are protein growth factors required for the formation of blood vessels (angiogenesis).

<span class="mw-page-title-main">ANGPT2</span> Protein-coding gene in the species Homo sapiens

Angiopoietin-2 is a protein that in humans is encoded by the ANGPT2 gene.

<span class="mw-page-title-main">PTPN6</span> Protein-coding gene in the species Homo sapiens

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<span class="mw-page-title-main">TEK tyrosine kinase</span> Protein-coding gene in the species Homo sapiens

Angiopoietin-1 receptor also known as CD202B is a protein that in humans is encoded by the TEK gene. Also known as TIE2, it is an angiopoietin receptor.

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Ephrin A1 is a protein that in humans is encoded by the EFNA1 gene.

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<span class="mw-page-title-main">ANGPT4</span> Protein-coding gene in the species Homo sapiens

Angiopoietin-4 is a protein that in humans is encoded by the ANGPT4 gene.

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References

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Further reading

This article incorporates text from the United States National Library of Medicine, which is in the public domain.