CAS 87616-84-0 GHRP-6



Product Name:Mechano growth factor
Alias: Pegylated MGF, PEG Ec
Sequence: PEG-Tyr-Gln-PRO-PRO-Ser-Thr-Asn-Lys-Asn-Thr-Lys-Ser-Gln-Arg-Arg-Lys-Gly-Ser-Thr-Phe-Glu-Glu-Arg-Lys-NH2
MF: C121H200N42O39
MW: 2888.16
Purity: 99%
Specification: 2mg/vial
Appearance: White Lyophilized Powder


MGF is a splice variant of the IGF gene which increases stem cell count in the muscle and allows for muscle fibers to fuse and mature. This is a process required for growth of adult muscle. Natural MGF is made locally and does not travel into the bloodstream. Synthetic MGF is water based and when administered intramuscularly, travels into the bloodstream. MGF is only stable in the blood stream for only a few minutes.

PEGylation is the act of attaching a Polyethylene glycol (PEG) structure to another larger molecule (in this case, MGF). The PEG acts as a protective coating and the theory here is that this will allow the MGF to be carried through the blood stream without being broken down.

Pegylated MGF is more bioavailable. Injected 2-3 times per week, it maintains effective concentration for a long period.

In bodybuilding this drug is used to accelerate muscle growth. Other effects of the drug include decrease of fat mass of the body, endurance increase, improvement of immune defenceand skin, bone strengthening, lowering of cholesterol level, accelerated recovery. Those who administered MGF declared that they experienced no side effects, which frequently occur with the use of other drugs for gaining body mass.

Pegylated Mechano Growth Factor dosage regimen:

The average dose is 1000 mcg per 24 hours; the frequency is 2-3 times per week. The drug is injected subcutaneously 1-2 hours before training to imitate physiologic secretion. The cycle duration is 5-6 weeks.

MGF Mechano growth factor (MGF) is a novel splice variant of the insulin growth factor -1 (IGF-1), also known as IGF-1Ec in humans and IGF-1Eb in rodents. It is actually originally called MGF because the RNA form of it is expressed in muscle tissues in response to the overload or/and damage. The C-terminal peptide of the mechano growth factor (MGF) is a crucial region for the alternative splicing of the peptide. The alternative splicing in the MGF is brought about by the shift in the reading frame in which a specific C-terminal sequence (E-domain) is econded by exon 5 and the first part of the exon 6. Another interesting point in MGF is that, because of the E domain it contains, MGF can act on muscles independently from the rest of the molecule.

Furthermore, MGF can elicit very different effects with mGF promoting satellite cells proliferation and IGF-1 inducing differentiation (Dluzniewska et al. 2005). MGF was suggested to play a number of physiological roles because the failure in its expression may result to age-related loss of skeletal function. Included in its functions is its ability to become a potent neuroprotective as supported by the study that has shown functional copies of the MGF cDNA to be expressed in a plasmid vector which then protected facial neurons after nerve damage (Dluzniewska et al. 2005). One such failure is called sarcopenia.

Sarcopenia is the progressive loss of muscle tissues with the advancement in age. This illness is considered to be one of the major public health problems which are being experienced especially by the industrialized countries, and their effects are expected to place an increasing demand on public healthcare worldwide (Lynch 2004). When mechanical overload is introduced to a muscle (as by weight training), the IGF-1 gene is released and is differentially spliced during the body’s response. Initially, it is spliced to produce predominantly IGF-1Ec (called the MGF splice variant of IGF-1). This early splicing stimulates satellite cells into activation. This in turn allows the activation of extra undamaged nuclei to grow new muscle fibre and tissue.

The appearance of MGF also initiates the upregulation of new protein synthesis. After this initial splicing of IGF-1 into MGF, production then switches towards producing a systemic release of IGF-1Ea from the liver, which also upregulates protein synthesis as well. The expression of IGF-1 splice variants, over the course of the healing and regrowth phase of muscle repair is thought to be the primary anabolic mechanism by which the body produces new muscle. MGF is available as an injectable peptide, and it has been anecdotally shown that injecting it will cause a response in the area resulting in localized muscle growth.

It would also appear that with regards to age, the young have a better ability to respond to MGF (4), and that the elderly experience a decreased response to MGF which results in a decreased ability to stimulate the growth of new muscle tissue.

Insulin like growth factor-1 (IGF-1) expression is implicated in myocardial pathophysiology, and two IGF-1 mRNA splice variants have been detected in rodents, IGF-1Ea and mechano-growth factor (MGF). We investigated the expression pattern of IGF-1 gene transcripts in rat myocardium from 1 h up to 8 weeks after myocardial infarction induced by left anterior descending coronary artery ligation. In addition, we characterized IGF-1 and MGF E peptide action and their respective signalling in H9C2 myocardial-like cells in vitro. IGF-1Ea and MGF expression were significantly increased, both at transcriptional and translational levels, during the late post infarction period (4 and 8 weeks) in infarcted rat myocardium. Measurements of serum IGF-1 levels in infarcted rats were initially decreased (24 h up to 1 week) but remained unaltered throughout the late experimental phase (4 to 8 weeks) compared with sham-operated rats. Furthermore, specific anti-IGF-1R neutralizing antibody failed to block the synthetic MGF E peptide action, whereas it completely blocked IGF-1 action on the proliferation of H9C2 cells. Moreover, this synthetic MGF E peptide did not activate Akt phosphorylation, whereas it activated ERK1/2 in H9C2 rat myocardial cells. These data support the role of IGF-1 expression in the myocardial repair process and suggest that synthetic MGF E peptide actions may be mediated via an IGF-1R independent pathway in rat myocardial cells, as suggested by our in vitro experiments





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CAS 87616-84-0 GHRP-6
CAS 87616-84-0 GHRP-6
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