A Complete Workflow for High Throughput Human Single Skeletal Muscle Fiber Proteomics

Area of Science:

• Biochemistry
• Proteomics
• Skeletal Muscle Physiology

Background:

• Skeletal muscle's diverse fiber types regulate metabolism.
• Aging and diseases impact muscle fiber types differently.
• Understanding fiber-type specific proteomic changes is crucial.

Purpose of the Study:

• To develop a high-throughput method for single skeletal muscle fiber proteomics.
• To overcome the limitations of slow and laborious existing techniques.
• To enable large-scale studies of muscle fiber proteomes.

Main Methods:

• Utilized a single-cell proteomics approach for rapid quantification.
• Analyzed 53 isolated skeletal muscle fibers from two healthy individuals.
• Applied single-cell data analysis techniques for data integration.

Main Results:

• Achieved quantification of single muscle fiber proteomes in 15 minutes per fiber.
• Successfully differentiated between Type 1 and Type 2A muscle fibers.
• Identified 94 differentially abundant proteins related to metabolism and muscle function.

Conclusions:

• The new method is significantly faster and more efficient than previous techniques.
• Sufficient proteome depth is maintained for meaningful analysis.
• This high-throughput assay will facilitate extensive studies on single muscle fibers across populations.