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High Pressure Cell Disruptors from Constant Systems

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Constant Systems Cell Disruptors are highly utilised by research groups in the areas of drug discovery, protein characterisation and functional studies of cellular processes. To date, CS cell disruptors have directly contributed to research published in over 1,200 peer reviewed papers across a range of academic journals, including Nature and the Journal of Biological Chemistry.

Comparative Lysis Efficiency of Escherichia coli at 20 and 35 kpsi

Escherichia coli Lysis Rate with Varying Pressure and Cell Count

Escherichia coli Lysis Rate with Multiple Passes and Pressures

Culture: Lyophilised Baker’s Yeast (Saccharomyces cerevisiae) was used to inoculate 200 mL sterile YMB (Yeast Mold Broth: Peptone 5 g/L, Dextrose 10 g/L, Maltose 3 g/L, Yeast Extract 3g/L) in 1 L flasks which were then incubated at 30°C with shaking at approximately 100 rpm for 24 hours.

Disruption: The resulting culture was passed in 30 mL aliquots through either a Constant Systems Ltd. ‘Z+’ 1.1 kW Continuous Flow Cell Disruptor or a Thermo Spectronic French Pressure Cell Press at
40 kpsi. The samples were weighed before and after being passed through the machines, and the time taken to process was recorded. The machines were rinsed with 30 mL deionised water between each use.

Counting: After being passed through the machines, 10 µL of lysate was mixed 1:1 with the viability stain Trypan Blue. White live cells and blue dead cells were counted using a hemocytometer. A sample of unlysed cells from the same culture was used as a control, from which the percentage partial lysis (including blue cells) and complete lysis was calculated.

Many machines that perform mechanical lysis and homogenisation
of cells are sold based on the pressure they are capable of reaching.
However, recent research demonstrates there is much more to
mechanical cell disruption than just one number