Myotube Analyzer

Myotube Analyzer quantifies myogenic features from microscopic images of muscle stem cell cultures (including human adult satellite cells) to assess myogenic potency using metrics such as fusion index, nucleus clustering, and myotube shape.

Key Features:

• Enhanced Quantitative Metrics: Computes the conventional fusion index plus five novel parameters that quantify nucleus clustering and myotube shape for a more comprehensive assessment of myogenic potency.
• Image Processing and Segmentation: Provides image adjustment, mask editing, and semi-automatic segmentation functions for preprocessing and delineation of nuclei and myotubes.
• Sample and Marker Compatibility: Processes fixed differentiated myoblast cultures stained with nuclear markers and MyHC (myosin heavy chain) markers.
• Validation and Reliability: Validation comparing satellite cell cultures from children with cerebral palsy to typically developing children showed five of six parameters with intra-class correlation coefficients (ICC) greater than 0.75.
• Data Output: Outputs traditional metrics (e.g., fusion index), the novel parameters, and raw data for downstream analysis.

Scientific Applications:

• Assessment of Myogenic Potency: Quantitatively evaluates myogenic potential of skeletal muscle stem cell cultures using multiple morphological parameters.
• Comparative Pathology Studies: Identifies and quantifies differences in nucleus and myotube features between pathological conditions (e.g., cerebral palsy) and typical development.
• Morphological Phenotyping: Enables detailed phenotyping of myotube shape and nuclear organization in differentiated myoblast cultures stained for nuclear and MyHC markers.

Methodology:

Analysts define parameters using the Myotube Analyzer application; the software processes fixed differentiated myoblast cultures stained with nuclear and MyHC markers and outputs fusion index, the five novel parameters, and raw data.