Injected cells provide a valuable complement to cell-free systems for analysis of gene expression
J B Gurdon1, K Javed1, M H Wen1
1Wellcome Trust, University of Cambridge, CB2 1QN, United Kingdom; Cancer Research UK Gurdon Institute, University of Cambridge, CB2 1QN, United Kingdom.
Experimental Cell Research
|September 27, 2020
Summary
Cell injection allows studying molecular functions within a cell's natural environment, maintaining normal component concentrations. This method enhances understanding of DNA transcription and protein synthesis, revealing stable transcription factor binding dynamics.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- Cell-free systems offer a controlled environment for analyzing cellular component functions.
- Achieving physiological concentrations of cellular components in cell-free systems is challenging.
- Investigating molecular functions within a native cellular context remains crucial.
Purpose of the Study:
- To highlight the advantages of purified molecule injection into living cells.
- To present cell injection as a complementary approach to cell-free systems.
- To discuss the implications for analyzing cellular component function and dynamics.
Main Methods:
- Review of studies employing purified molecule injection into living cells.
- Comparison of cell injection techniques with traditional cell-free systems.
- Analysis of data from DNA transcription and messenger RNA injection experiments.
Main Results:
- Cell injection maintains physiological concentrations of cellular components, unlike cell-free systems.
- Demonstrated efficiency and long duration of DNA transcription by RNA polymerase II via injection.
- Successful protein synthesis achieved through purified messenger RNA injection.
- Revealed long-term transcription factor residence on DNA/chromatin, a novel finding.
Conclusions:
- Cell injection provides a superior method for studying molecular functions in a native cellular environment.
- This technique offers new insights into gene expression regulation, including transcription factor dynamics.
- Revisiting the concept of stable transcription factor binding during the cell cycle.
