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 (ăk′tə-vĭn, ăk-tĭv′ĭn)
A polypeptide growth factor that is synthesized in the pituitary gland and the gonads and stimulates the secretion of follicle-stimulating hormone.

[activ(ate) + (inhib)in (from its activating follicle-stimulating hormone).]
References in periodicals archive ?
This drug, an injectable activin type IIa receptor fusion protein, is designed to attach to a molecule that inhibits erythrocyte (immature RBC) production.
This investigation was a substudy of a study examining activin A as a marker of EP (22).
Many tumours produce a molecule called activin, which plays a role in muscle breakdown.
Antioxidant Products: Natural grape colors derived from the rubired grapes (most stable anthocyanins in nature); grape antioxidants (grape seed extract, ActiVin, GRAS affirmed by FDA); grape seed flour (high in fiber, antioxidants and is gluten-free); grape seed oil (cold pressed, no solvents used); other natural colors (new colors under development from other vegetables)
Others' reports show that grape seed extract (GSE) of Vitis venifera and a commercialized grape extract, ActiVin, have antibacterial properties of killing Escherichia coli 0157:H7, Salmonella typhimurium, and Listeria monocytogenes (Ahn et al.
b) APO-A1 M00001 PEPCK K03243 CYP1A2 K02422 Early growth response protein 1 M18416 Activin, beta E AF089825 G1/S-specific cyclin D1 D14014 HSP70 Z27118 CPT1 L07736 Protein disulfide M86870 isomerase--related protein Tumor necrosis factor receptor 1 M63122 Serine protease inhibitor M32247 ABC transporter AJO03004 U.
Also increased is the mRNA of a member of the TGF-[beta] superfamily, activin [[beta].
Smith and his co-workers at Innogenetics in Ghent, Belgium, and the National Institute for Medical Research in London, England, report in the June 21 NATURE that this compound, known as XTC-MIF, appears structurally similar to activin, a human growth factor.
Dalantercept is a novel protein therapeutic that inhibits angiogenesis by targeting the activin receptor-like kinase 1 (ALK1) pathway.
Acceleron reported that Sotatercept is a novel and first-in-class activin type IIA receptor (ActRIIA) fusion protein that acts during late-stage erythropoiesis (red blood cell production) to increase the production of mature red blood cells into circulation.
The oviduct can secrete many growth factors, such as EGF, TGF, IGF, and activin (Schell et al.
Several studies have shown that blocking the myostatin pathway can promote muscle growth, said Han, and some have shown that a molecule closely related to myostatin, called activin A, becomes more abundant in patients with some cancers.