Decellularization-Based Quantification of Skeletal Muscle Fatty Infiltration

Area of Science:

• Biomedical Engineering
• Muscle Physiology
• Histopathology

Background:

• Fatty infiltration, the accumulation of adipocytes in skeletal muscle, is a hallmark of various myopathies and metabolic disorders.
• Current clinical assessments in humans use imaging like CT, MRI, and ultrasound.
• Existing methods for small animals, such as CT, MRI, and histology, face challenges with cost, spatial resolution, and sampling bias.

Purpose of the Study:

• To present a novel decellularization protocol for comprehensive qualitative and quantitative analysis of fatty infiltration in intact skeletal muscle.
• To overcome limitations of current imaging and histological techniques in small animal models.
• To provide an accessible and cost-effective method for assessing muscle adiposity.

Main Methods:

• A decellularization protocol was developed to process intact skeletal muscle tissue.
• The method allows for visualization of adipocyte distribution and quantification of fatty infiltration at the tissue and individual adipocyte levels.
• The protocol is adaptable for various muscles, species, and human biopsies.

Main Results:

• The decellularization technique provides comprehensive visualization of fatty infiltration throughout intact muscle.
• It enables both qualitative and quantitative assessments of adipocyte accumulation.
• The method is demonstrated to be cost-effective and usable with standard laboratory equipment.

Conclusions:

• Decellularization offers a superior method for assessing skeletal muscle fatty infiltration compared to existing techniques.
• This protocol enhances the ability to study myopathies and metabolic disorders in preclinical models.
• The accessibility and scalability of this method can benefit a wide range of research laboratories studying muscle pathology.