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Follistatin 344

IGF Axis & Muscle
FST-344Follistatin

Overview

Follistatin 344, also known as FST-344 or simply Follistatin, is a glycoprotein originally identified in follicular fluid. It is encoded by the FST gene and is characterized by its ability to bind and neutralize members of the TGF-beta superfamily, particularly activins. Follistatin is synthesized in various tissues, including the liver and muscle, and is involved in numerous physiological processes. Researchers have primarily focused on its role in muscle growth and development, as well as its potential therapeutic applications in muscle-wasting conditions. Studies have shown that Follistatin 344 can promote muscle hypertrophy and improve muscle strength, making it a compound of interest in the field of muscle biology. Additionally, it has been investigated for its effects on the insulin-like growth factor (IGF) axis, which plays a crucial role in growth and metabolism. The mechanism of action of Follistatin 344 involves the inhibition of activins and myostatin, both of which are negative regulators of muscle growth. By binding to these proteins, Follistatin prevents them from interacting with their receptors, thereby promoting muscle cell proliferation and differentiation. This action is mediated through pathways that include the SMAD signaling cascade. Pharmacokinetic data on Follistatin 344 is limited, but researchers have noted that its stability and bioavailability can vary depending on the route of administration. The compound is generally considered to have a short half-life, necessitating frequent administration for sustained effects. Current research on Follistatin 344 is focused on its potential therapeutic applications, particularly in the treatment of muscle-wasting diseases such as muscular dystrophy. However, it is not yet approved for clinical use, and its regulatory status varies by region. Ongoing studies aim to better understand its safety profile and long-term effects.

Mechanism of Action

Follistatin 344 exerts its effects by binding to and inhibiting activins and myostatin, which are part of the TGF-beta superfamily. This inhibition prevents these proteins from activating their respective receptors, thereby promoting muscle growth through the SMAD signaling pathway.

Half-Life

IntranasalNot applicable
OralPoor bioavailability

Pharmacokinetic data is limited, and half-life may vary based on administration route.

Storage

Lyophilized

Stable for 2+ years at -20°C, 12 months at 4°C

Reconstituted

Use within 14 days when refrigerated at 4°C

Avoid

Avoid repeated freeze-thaw cycles, direct light

Solvent

Bacteriostatic water or sterile saline recommended

Solubility

Follistatin 344 is soluble in water and aqueous buffers but has limited solubility in organic solvents like acetonitrile and DMSO.

Legal Status

🇩🇪DE

Not approved as a medicinal product. Not a controlled substance. Sale as research chemical is a legal grey area.

🇺🇸US

Not approved by the FDA for clinical use. Not scheduled by the DEA.

🇦🇺AU

Not listed on the Australian Register of Therapeutic Goods. Not scheduled by the TGA.

🇬🇧UK

Not approved by the MHRA for medicinal use.

Legal status information is provided for general reference only and may not reflect the most current regulatory changes. Always verify with official government sources before making any decisions.

9 Research Publications

Influence of choline and follistatin supplementation during in vitro bovine oocyte maturation on oocyte competence and blastocyst development.

Unknown

Zygote (Cambridge, England) · 2024

Researchers studied the effects of choline and follistatin supplementation on the maturation of bovine oocytes (egg cells) in a lab setting. They found that these supplements positively influenced the quality of the oocytes and improved the development of embryos into blastocysts, which are early-stage embryos.

  • Researchers observed that choline supplementation enhanced the competence of bovine oocytes during maturation.
  • The addition of follistatin was found to improve the overall quality of the oocytes.
  • The study indicated that both supplements contributed to better blastocyst development from the matured oocytes.
PubMed

Follistatin and follistatin-like 3 in metabolic disorders.

Review

Prostaglandins & other lipid mediators · 2023

Researchers reviewed the role of follistatin and its related protein, follistatin-like 3, in metabolic disorders such as type 2 diabetes and obesity. They found that while some studies suggest a connection, the results are inconsistent and more research is needed to clarify their exact roles in these conditions.

  • Follistatin and follistatin-like 3 may influence the development of metabolic disorders.
  • Current studies on their effects in type 2 diabetes and obesity show conflicting results.
  • There is a strong need for further research to better understand their roles in diabetes and obesity.
PubMed

Follistatin-controlled activin-HNF4α-coagulation factor axis in liver progenitor cells determines outcome of acute liver failure.

Human

Hepatology (Baltimore, Md.) · 2022

Researchers studied how liver progenitor cells (LPCs) respond during acute liver failure (ALF) and found that the balance of certain proteins, particularly follistatin and activin, influences patient outcomes. They observed that patients who recovered from ALF had a healthier balance of these proteins, leading to better liver function compared to those who required a liver transplant.

  • Recovered ALF patients showed robust expression of HNF4α in LPCs, which is crucial for liver function.
  • A normal activin/follistatin ratio in recovered patients was linked to improved coagulation function.
  • Serum levels of follistatin could predict the risk and mortality associated with acute-on-chronic liver failure.
PubMed

Follistatin-Like Proteins: Structure, Functions and Biomedical Importance.

Review

Biomedicines · 2021

Researchers reviewed the role of follistatin-like proteins, which are important cellular messengers involved in various biological processes. They observed that these proteins play a crucial role in cell signaling and can impact health by regulating cell growth, differentiation, and inflammation. Understanding their functions could lead to advancements in biomedical applications.

  • Follistatin-like proteins are key messengers that can influence both their own cells and neighboring cells.
  • These proteins are involved in critical processes like the cell cycle and inflammation, with their dysfunction linked to serious health issues.
  • The study highlights the need for further research to fully understand the mechanisms of action of follistatin-like proteins.
PubMed

Detection of black market follistatin 344.

Unknown

Drug testing and analysis · 2019

Researchers studied black market products claiming to contain follistatin, a banned substance in sports. They found that while only nine out of seventeen products actually contained follistatin, some included other growth-promoting peptides. The researchers developed a reliable detection method to identify these substances in urine and serum samples.

  • Only nine of the seventeen tested black market products contained actual follistatin.
  • Some products also contained other growth-promoting peptides like MGF and GHRP-2.
  • The detection method developed can differentiate between the synthetic and natural forms of follistatin.
PubMed

Circulating follistatin in relation to energy metabolism.

Review

Molecular and cellular endocrinology · 2016

Researchers found that the liver plays a significant role in producing a protein called follistatin, which is regulated by the balance of glucagon and insulin in the body. This new understanding challenges previous beliefs about how follistatin circulates in the body and suggests it may be linked to energy metabolism and insulin sensitivity.

  • Researchers observed that the liver significantly contributes to the levels of circulating follistatin.
  • The study found that the balance between glucagon and insulin tightly regulates circulating follistatin.
  • Conditions with high levels of circulating follistatin are associated with decreased insulin sensitivity and increased glucagon levels.
PubMed

Follistatin.

Review

The international journal of biochemistry & cell biology · 1998

Researchers reviewed the role of follistatin, a protein that interacts with other proteins involved in growth and development. They found that follistatin is crucial for normal development, and its absence can lead to serious defects in newborns. The study suggests that follistatin may have potential as a treatment for diseases linked to overproduction of certain growth proteins.

  • Follistatin is essential for normal development, as shown by studies in mice.
  • Mice lacking follistatin experience severe defects and die shortly after birth.
  • Follistatin may be useful in addressing diseases caused by excess growth proteins.
PubMed

Activin/follistatin and atherosclerosis--a review.

Review

Journal of atherosclerosis and thrombosis · 1998

Researchers reviewed the roles of activin-A and follistatin in atherosclerosis, a condition characterized by the buildup of fats and cholesterol in arteries. They found that activin-A can hinder the removal of harmful LDL cholesterol, while follistatin appears to counteract this effect, promoting better cholesterol disposal. This study highlights the complex interactions between these proteins in the development of atherosclerosis.

  • Researchers observed that activin-A reduces the expression of a key receptor that helps clear harmful LDL cholesterol from the body.
  • The study found that follistatin can enhance the clearance of LDL cholesterol by blocking the effects of activin-A.
  • Researchers noted that both activin-A and follistatin are present in various atherosclerotic lesions in human arteries.
PubMed

Follistatin/activin-binding protein.

Unknown

Trends in endocrinology and metabolism: TEM · 1992

Researchers studied a protein called follistatin, which can suppress the secretion of follicle-stimulating hormone (FSH). They found that follistatin binds to another protein called activin, suggesting that it may have broader biological roles in various bodily systems.

  • Follistatin is distinct from inhibin but shares the ability to suppress FSH secretion.
  • Follistatin is identified as an activin-binding protein.
  • The binding of follistatin to activin indicates potential wider biological functions.
PubMed

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This page is for informational and research purposes only. All information is based on published scientific literature. Nothing on this page constitutes medical advice or replaces consultation with a qualified healthcare professional.