HUMAN Growth Peptides GDF-8 Gdf-8 Myostatin 1mg

Product details:
Product Name: GDF 8 Powder 1mg/vial
Pharmaceutical Raw Materials High purity GDF-8 ( myostatin )
Brand Name : SENDI
Packing : 1box / 10vials, 1mg / vial
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Product Details

Lyophilized Bodybuilding Peptide GDF-8 Gdf-8 Myostatin 1mg

hk@chembj.com

Product details:
Product Name:  GDF 8 Powder 1mg/vial  
Pharmaceutical Raw Materials High purity GDF-8 ( myostatin )  
Brand Name : SENDI 
Packing : 1box / 10vials, 1mg / vial
CAS No:  901758-09-6
Molecular Formula:  C221H366N72O67S
Application:  Pharmaceutical raw materials
Purity:  > 99.9%

MOQ: 5-10Vials


Descriptions of GDF-8 :
Myostatin (also known as growth differentiation factor 8, abbreviated GDF-8) is a myokine, a protein produced and released by myocytes that acts on muscle cells' autocrine function to inhibit myogenesis: muscle cell growth and differentiation. In humans it is encoded by the MSTN gene. Myostatin is a secreted growth differentiation factor that is a member of the TGF beta protein family.Animals either lacking myostatin or treated with substances that block the activity of myostatin have significantly more muscle mass. Furthermore, individuals who have mutations in both copies of the myostatin gene have significantly more muscle mass and are stronger than normal. Blocking the activity of myostatin may have therapeutic application in treating muscle wasting diseases such as muscular dystrophy.


GDF-8 Purity:
GDF-8 has a peptide purity level that exceeds 99.0% as determined by HPLC.


GDF-8 Usage:
The gene encoding myostatin was discovered in 1997 by geneticists Se-Jin Lee and Alexandra McPherron who produced a strain of mutant mice that lack the gene. These myostatin "knockout" mice have approximately twice as much muscle as normal mice. These mice were subsequently named "mighty mice".
 
Naturally occurring deficiencies of myostatin have been identified in cattle by Ravi Kambadur, whippets, and humans; in each case the result is a dramatic increase in muscle mass. A mutation in the 3' UTR of the myostatin gene in Texel sheep creates target sites for the microRNAs miR-1 and miR-206. This is likely to cause the muscular phenotype of this breed of sheep.
 
Human myostatin consists of two identical subunits, each consisting of 109 (NCBI database claims human myostatin is 375 residues long) amino acid residues. Its total molecular weight is 25.0 kDa. The protein is inactive until a protease cleaves the NH2-terminal, or "pro-domain" portion of the molecule, resulting in the active COOH-terminal dimer. Myostatin binds to the activin type II receptor, resulting in a recruitment of either coreceptor Alk-3 or Alk-4. This coreceptor then initiates a cell signaling cascade in the muscle, which includes the activation of transcription factors in the SMAD family - SMAD2 and SMAD3. These factors then induce myostatin-specific gene regulation. When applied to myoblasts, myostatin inhibits their differentiation into mature muscle fibers.
 
Myostatin also inhibits Akt, a kinase that is sufficient to cause muscle hypertrophy, in part through the activation of protein synthesis. However, Akt is not responsible for all of the observed muscle hyperthrophic effects which are mediated by myostatin inhibition Thus myostatin acts in two ways: by inhibiting muscle differentiation, and by inhibiting Akt-induced protein synthesis.
 
Further research into myostatin and the myostatin gene may lead to therapies for muscular dystrophy. The idea is to introduce substances that block myostatin. A monoclonal antibody specific to myostatin increases muscle mass in mice and monkeys.
 
A two-week treatment of normal mice with soluble activin type IIB receptor, a molecule that is normally attached to cells and binds to myostatin, leads to a significantly increased muscle mass (up to 60%). It is thought that binding of myostatin to the soluble activin receptor prevents it from interacting with the cell-bound receptors.
 
It remains unclear as to whether long-term treatment of muscular dystrophy with myostatin inhibitors is beneficial, as the depletion of muscle stem cells could worsen the disease later on. As of 2012, no myostatin-inhibiting drugs for humans are on the market. An antibody genetically engineered to neutralize myostatin, stamulumab, which was under development by pharmaceutical company Wyeth., is no longer under development. Some athletes, eager to get their hands on such drugs, turn to the internet where fake "myostatin blockers" are being sold.
 
Myostatin levels are effectively decreased by creatine supplementation.
Inhibition of myostatin leads to muscle hyperplasia and hypertrophy. Myostatin inhibitors can improve athletic performance and therefore there is a concern these inhibitors might be abused in the field of sports. However, studies in mice suggest that myostatin inhibition does not directly increase the strength of individual muscle fibers.

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