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Tissue Homogenization and Cell Lysis

Tissue Homogenization and Cell Lysis

Tissue homogenization involves disintegrating tissue architecture and lysing cells, and is an early step in isolating and analyzing cellular components. The method used for homogenization depends on the sample type, the amount of sample available, the analyte to be obtained, and the sensitivity of the method. These methods are broadly classified as mechanical and non-mechanical methods.
Mechanical methods of tissue homogenization
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Updated: Sep 20, 2025

Escherichia coli-Based Cell-Free Protein Synthesis: Protocols for a robust, flexible, and accessible platform technology

Escherichia coli-Based Cell-Free Protein Synthesis: Protocols for a robust, flexible, and accessible platform technology

Published on: February 25, 2019

Optimization of E. Coli Tip-Sonication for High-Yield Cell-Free Extract using Finite Element Modeling.

Sakib Ferdous¹, Jared L Dopp¹, Nigel F Reuel¹

¹Department of Chemical and Biological Engineering, Iowa State University.

Aiche Journal. American Institute of Chemical Engineers

|June 6, 2022

Summary

Optimizing tip sonication settings, including immersion depth, is crucial for preparing viable cell extracts. Maintaining solution temperatures below 32°C maximizes yield, while higher temperatures significantly reduce it.

Keywords:

Cell-free protein synthesis bacterial cell lysis protein-denaturation sonolysis tip-sonication ultrasonic cell disruption

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Area of Science:

Biotechnology
Bioprocess Engineering
Biochemistry

Background:

Sonication is vital for cell lysis and extract preparation.
Temperature-sensitive procedures require precise control of sonication parameters.
Cavitation hotspots can cause localized overheating, impacting biological sample integrity.

Purpose of the Study:

To determine optimal tip sonication settings for viable cell extract preparation.
To investigate the impact of temperature on *E. coli* cell extract performance.
To develop a predictive model for sonication parameter optimization.

Main Methods:

Finite element (FE) heat transfer modeling to simulate temperature distribution.
Experimental validation of the FE model with high correlation (R² > 97%).
Assessment of *E. coli* BL21 DE3 star strain extract yield at varying temperatures.

Main Results:

Optimal tip immersion depth identified as 20-30% below the liquid surface for enhanced mixing and heat dissipation.
Maximum relative yields observed for solution temperatures below 32°C.
Relative yields decreased to below 50% at temperatures above 47°C.

Conclusions:

Precise control of sonication parameters, particularly tip immersion depth and temperature, is essential for maximizing viable cell extract yield.
The developed FE model and master plots provide a generalized workflow for optimizing sonication parameters.
Understanding temperature thresholds is critical for reproducible and efficient cell extract preparation.