FST 344
Follistatin-344 (FST-344) is a 344-amino-acid splice variant of the naturally occurring glycoprotein follistatin. It is best classified as a protein/glycoprotein biologic rather than a simple peptide. FST-344 binds TGF-β superfamily ligands, especially activins and myostatin, with reported interactions involving other related ligands depending on experimental context.
FST 344
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Follistatin-344 (FST-344) is a 344-amino-acid splice variant of the naturally occurring glycoprotein follistatin. It is best classified as a protein/glycoprotein biologic rather than a simple peptide. FST-344 binds TGF-β superfamily ligands, especially activins and myostatin, with reported interactions involving other related ligands depending on experimental context.
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FST-344 serves as a key endogenous antagonist of myostatin (GDF-8) and activin and is widely used in published research examining muscle hypertrophy, sarcopenia, muscular dystrophy models, and the broader activin/myostatin signalling pathways. Its main research role involves binding and neutralizing myostatin and activin, thereby inhibiting downstream signalling activity through TGF-β family receptor pathways.
FST-344 is studied across multiple areas of scientific research, including:
- Muscle wasting and atrophy models, such as cachexia and sarcopenia, are used to evaluate the suppression of growth-inhibiting pathways.
- Muscle hypertrophy research focused on promoting lean mass through myostatin inhibition
- Regenerative medicine and tissue engineering applications involving tendon and ligament repair.
- Metabolic research examining potential effects on lipid regulation and insulin sensitivity
- Broader signalling studies using FST-344 to better understand TGF-β superfamily regulatory networks.
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