Activin A inhibits BMP-signaling by binding ACVR2A and ACVR2B.

Oddrun Elise Olsen, Karin Fahl Wader, Hanne Hella, Anne Kærsgaard Mylin, Ingemar Turesson, Ingerid Nesthus, Anders Waage, Anders Sundan, Toril Holien

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Activins are members of the TGF-β family of ligands that have multiple biological functions in embryonic stem cells as well as in differentiated tissue. Serum levels of activin A were found to be elevated in pathological conditions such as cachexia, osteoporosis and cancer. Signaling by activin A through canonical ALK4-ACVR2 receptor complexes activates the transcription factors SMAD2 and SMAD3. Activin A has a strong affinity to type 2 receptors, a feature that they share with some of the bone morphogenetic proteins (BMPs). Activin A is also elevated in myeloma patients with advanced disease and is involved in myeloma bone disease.
Original languageEnglish
Article number27
JournalCell Communication and Signaling
Issue number1
Publication statusPublished - 2015

Subject classification (UKÄ)

  • Hematology


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