Apr 28, 2020
Trypan blue and Turk solution
- Marco Cosentino1,
- Elisa Storelli1,
- Alessandra Luini1,
- Emanuela Rasini1,
- Massimiliano Legnaro1,
- Marco Ferrari1,
- Franca Marino1
- 1Center for Research in Medical Pharmacology, University of Insubria (Varese, Italy)
Document Citation: Marco Cosentino, Elisa Storelli, Alessandra Luini, Emanuela Rasini, Massimiliano Legnaro, Marco Ferrari, Franca Marino 2020. Trypan blue and Turk solution. protocols.io https://dx.doi.org/10.17504/protocols.io.beegjbbw
License: This is an open access document distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited
Created: March 31, 2020
Last Modified: April 28, 2020
Document Integer ID: 34984
Keywords: blue test trypan, viable cell trypan blue, turk solution trypan blue test trypan, dye exclusion method, staining method, red blood cell, aqueous methylene blue, white blood cell, hematological stain, staining, membrane of red blood cell, distinctive blue colour, stain, dead cell, live cell, blood sample, trypan, turk solution trypan, cell, nuclei of the white blood cell, blood, intact cell membrane, tissues with intact cell membrane, test, crystal violet
Abstract
Trypan Blue test
Trypan is test used as a stain to selectively colour dead cells. Live cells or tissues with intact cell membranes are not coloured. Since cells are very selective in the compounds that pass through the membrane, in a viable cell trypan blue is not absorbed; however, it traverses the membrane in a dead cell. Hence, dead cells appear as a distinctive blue colour under a microscope. Since live cells are excluded from staining, this staining method is also described as a dye exclusion method.Trypan is test used as a stain to selectively colour dead cells. Live cells or tissues with intact cell membranes are not coloured. Since cells are very selective in the compounds that pass through the membrane, in a viable cell trypan blue is not absorbed; however, it traverses the membrane in a dead cell. Hence, dead cells appear as a distinctive blue colour under a microscope. Since live cells are excluded from staining, this staining method is also described as a dye exclusion method.
Türk's solution
Türk's solution is a hematological stain (crystal violet or aqueous methylene blue) that destroys the membrane of red blood cells (RBCs), white blood cells (WBCs) and platelets and platelets within a blood sample, and stains the nuclei of the white blood cells, making them easier to see and count. Turk's solution is a gold standard for counting leukocytes in a defined volume of blood.
Troubleshooting
Turk solution:
Add 0.2 ml of Gentian Violet 1% + 0.3 ml of Acetic Acid 100 % to 0.950 ml of ultrapure water.
Work under chemical hood (Room TSO8).
Gentian Violet is in closet 1 (Room TSO8), Acetic Acid is in acid and basic cabinet (Room TSO8).
Storage: 4 °C in the dark covered with aluminium foil. Fridge 1- (Room TSO8).
Acetic Acid 100%: catalog number A6283, Sigma Italy.
Gentian Violet 1%: Marco Viti
Trypan Blue solution 0.4 %:
Prepare a dilution at 0.2% (v/v): 0.5 ml of Trypan Blue stock solution + 0.5 ml of sterile PBS.
Work under laminar flow hood (Room PSO3).
Trypan Blue solution 0.4 % is in poisons closet (Room TSO8).
Storage: 4 °C in the dark covered with aluminium foil. Fridge 1- (Room PSO3).
Trypan Blue solution 0.4%: catalog number T8154, Sigma Italy.