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Isolating Myofibrils from Skeletal Muscle Biopsies and Determining Contractile Function with a Nano-Newton Resolution Force Transducer
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Biologia
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JoVE Journal Biologia
Isolating Myofibrils from Skeletal Muscle Biopsies and Determining Contractile Function with a Nano-Newton Resolution Force Transducer

Isolating Myofibrils from Skeletal Muscle Biopsies and Determining Contractile Function with a Nano-Newton Resolution Force Transducer

DOI:
10.3791/61002-v

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07:55 min

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May 07, 2020

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, , , ,
1Department of Physiology,Amsterdam UMC, 2Department of Kinesiology and Physical Education, Faculty of Education,McGill University, 3IONOptix BV

Capitoli

  • 00:04Introduction
  • 00:50Myofibril and Mounting Needle Preparation
  • 02:08Experiment Initialization
  • 04:03Tension Redevelopment Rate Measurement
  • 05:04Stepwise Stretch
  • 05:33Results: Representative Active and Passive Tension Analyses
  • 07:03Conclusion

Summary

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Presented here is a protocol to assess the contractile properties of striated muscle myofibrils with nano-Newton resolution. The protocol employs a setup with an interferometry-based, optical force probe. This setup generates data with a high signal-to-noise ratio and enables the assessment of the contractile kinetics of myofibrils.

Tags

Keywords: MyofibrilsSkeletal Muscle BiopsiesContractile FunctionNano-Newton Resolution Force TransducerSarcomere DysfunctionSarcomeric ProteinsPermeabilized CardiomyocytesHomogenizationMyofibril SuspensionRelaxing SolutionPoly-HEMA Coated SlideShellac Ethanol GlueMounting NeedleMicro-manipulatorsSarcomere LengthVessel FunctionVideo ImagingMicroscope Stage

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