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Myostatin is a myokine that is produced and released by myocytes and acts on muscle cells to inhibit muscle growth. [7] Myostatin is a secreted growth differentiation factor that is a member of the TGF beta protein family. [8] [9] Myostatin is assembled and produced in skeletal muscle before it is released into the blood stream. [10]
MyoD, also known as myoblast determination protein 1, [5] is a protein in animals that plays a major role in regulating muscle differentiation. MyoD, which was discovered in the laboratory of Harold M. Weintraub , [ 6 ] belongs to a family of proteins known as myogenic regulatory factors (MRFs). [ 7 ]
A myokine is one of several hundred cytokines or other small proteins (~5–20 kDa) and proteoglycan peptides that are produced and released by skeletal muscle cells (muscle fibers) in response to muscular contractions. [1] They have autocrine, paracrine and/or endocrine effects; [2] their systemic effects occur at picomolar concentrations. [3] [4]
Finally, the muscle fibers that form later arise from satellite cells. [3] Two genes significant in muscle fusion are Mef2 and the twist transcription factor. Studies have shown knockouts for Mef2C in mice lead to muscle defects in cardiac and smooth muscle development, particularly in fusion. [13] The twist gene plays a role in muscle ...
The dystrophin-associated protein complex, also known as the dystrophin-associated glycoprotein complex is a multiprotein complex that includes dystrophin and the dystrophin-associated proteins. [1] It is one of the two protein complexes that make up the costamere in striated muscle cells. The other complex is the integrin-vinculin-talin complex.
These satellite cells are the main source of most muscle cell formation postnatally, with embryonic myoblasts being responsible for prenatal muscle generation. A single satellite cell can proliferate and become a larger amount of muscle cells. [28] With the understanding that myosatellite cells are the progenitor of most skeletal muscle cells ...
Tropomyosin is a two-stranded alpha-helical, coiled coil protein found in many animal and fungal cells. In animals, it is an important component of the muscular system which works in conjunction with troponin to regulate muscle contraction.
Human cTnT is an ~36-kDa protein consisting of 297 amino acids including the first methionine with an isoelectric point (pI) of 4.88. It is the tropomyosin- binding and thin filament anchoring subunit of the troponin complex in cardiac muscle cells. [7] [8] [9] TNNT2 gene is expressed in vertebrate cardiac muscles and embryonic skeletal muscles ...