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Use of the Ramsay Assay to Measure Fluid Secretion and Ion Flux Rates in the Drosophila melanogaster Malpighian Tubule
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Use of the Ramsay Assay to Measure Fluid Secretion and Ion Flux Rates in the Drosophila melanogaster Malpighian Tubule

Use of the Ramsay Assay to Measure Fluid Secretion and Ion Flux Rates in the Drosophila melanogaster Malpighian Tubule

DOI:
10.3791/53144-v

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13:30 min

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November 25, 2015

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,
1Department of Internal Medicine,University of Texas Southwestern Medical Center

Chapters

  • 00:05Title
  • 00:53Preparing Tubule Transfer Rods
  • 01:33Preparing the Ion-Specific Electrodes
  • 03:38Preparing the Reference Electrodes and Calibrating the Electrodes
  • 07:16Tubule Dissection
  • 09:41Making Measurements
  • 11:06Results: Measurement K+ and Na+ Ion Fluxes to Investigate the Role of the Sodium-potassium-2-chloride Cotransporter (NKCC)
  • 12:07Conclusion

Summary

Automatic Translation

Automatic Translation

This protocol describes the use of the Ramsay assay to measure fluid secretion rates from isolated Malpighian (renal) tubules from Drosophila melanogaster. In addition, the use of ion-specific electrodes to measure sodium and potassium concentrations in the secreted fluid, allowing calculation of transepithelial ion flux, is described.

Tags

Keywords: Ramsay AssayFluid SecretionIon FluxDrosophila MelanogasterMalpighian TubuleEpithelial Ion TransportTransepithelial FluidIon-specific ElectrodesSodiumPotassiumGeneticsMolecular MechanismsHomeostasis

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