Related Experiment Video
Updated: Jul 16, 2026
07:37
Isolation and Characterization of Satellite Cells from Rat Head Branchiomeric Muscles
Published on: July 20, 2015
Myogenic precursor cells in craniofacial muscles.
L K McLoon1, K M Thorstenson, A Solomon
1Department of Ophthalmology, University of Minnesota, Minneapolis, MN, USA.
Oral Diseases
|February 20, 2007
Summary
Craniofacial skeletal muscles (CSkM) possess unique regenerative properties due to distinct developmental origins and retained satellite cells. These characteristics suggest potential for CSkM precursor cells in repairing not only muscle but also other craniofacial tissues.
Area of Science:
- Regenerative medicine
- Muscle biology
- Craniofacial development
Background:
- Craniofacial skeletal muscles (CSkM) differ from limb skeletal muscles (SkM) in embryological origin, myosin expression, and growth factor profiles.
- Adult extraocular muscles (EOM) and laryngeal muscles (LM) retain activated satellite cells, unlike limb SkM.
Purpose of the Study:
- To investigate the unique properties of CSkM, particularly their regenerative potential.
- To explore the possibility of utilizing CSkM precursor cells for tissue repair beyond muscle.
Main Methods:
- Comparative analysis of CSkM properties versus limb SkM.
- Examination of satellite cell populations and myogenic factors in adult CSkM.
Main Results:
- CSkM exhibit distinct embryological origins and express immature myosin isoforms.
- Adult EOM and LM retain activated satellite cells, suggesting a higher regenerative capacity.
- CSkM may possess more satellite cells or apoptosis-resistant precursor cells compared to limb muscle.
Conclusions:
- CSkM possess unique biological characteristics that confer a high innate regenerative capacity.
- The proliferative precursor cells in CSkM present a promising avenue for regenerative medicine, potentially aiding in the repair of nervous tissue and bone.
Related Concept Videos
01:14Muscles for Facial Expressions
The craniofacial muscles are a collection of approximately 20 thin skeletal muscles situated beneath the skin of the face and scalp. These muscles, primarily responsible for the vast array of human facial expressions, originate from the bones or fibrous structures of the skull and extend outwards to connect with the skin. While most skeletal muscles in the body are enveloped in thick fascia, facial muscles generally have a more delicate fascial covering, with the buccinator muscle being a...
01:13Formation of Muscle Fibers from Myoblasts
De novo myogenesis, or the formation of muscle fibers, begins during the early embryonic stages. The skeletal muscle is formed from somites– blocks of embryonic cell layers. The somites are further divided into dermatomes, myotomes, sclerotomes, and syndetomes. Among these, the myotomes give rise to muscle fibers.
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription factors...
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription factors...
01:21Satellite Stem Cells and Muscular Dystrophy
Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...
01:18Cranial Part of Parasympathetic Division
The cranial part of the parasympathetic division plays a crucial role in regulating the visceral functions of the head and specific structures in the neck, thoracic, and abdominopelvic cavities. Preganglionic fibers of the parasympathetic division exit the brain through cranial nerves III (oculomotor), VII (facial), IX (glossopharyngeal), and X (vagus), delivering parasympathetic output to the respective visceral structures.
The vagus nerve (cranial nerve X) alone accounts for approximately 75...
The vagus nerve (cranial nerve X) alone accounts for approximately 75...
01:13Microscopic Anatomy of Skeletal Muscles
Skeletal muscle cells, also called muscle fibers, are distinctly elongated, multi-nucleated, slender biological units. They are packed with specialized structures designed to facilitate their primary function, which is contraction.
The muscle sarcolemma is a plasma membrane enclosing each muscle cell that conducts electrical signals called action potentials. The sarcolemma extends into the cell to form T-tubules, ensuring the neural impulses are uniformly distributed across the entire muscle...
The muscle sarcolemma is a plasma membrane enclosing each muscle cell that conducts electrical signals called action potentials. The sarcolemma extends into the cell to form T-tubules, ensuring the neural impulses are uniformly distributed across the entire muscle...
00:55Skeletal Muscle Anatomy
Skeletal muscle is the most abundant type of muscle in the body. Tendons are the connective tissue that attaches skeletal muscle to bones. Skeletal muscles pull on tendons, which in turn pull on bones to carry out voluntary movements.