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RNA Isolation from Cell Specific Subpopulations Using Laser-capture Microdissection Combined with Rapid Immunolabeling
Published on: April 11, 2015
A simple, efficient method for the separate isolation of RNA and DNA from the same cells
N C Nicolaides1, C J Stoeckert
1Department of Anatomy, University of Pennsylvania, School of Medicine, Philadelphia 19104.
Biotechniques
|February 11, 1990
Summary
This study presents a novel method for isolating both cytoplasmic RNA and high molecular weight DNA from the same cell sample. The technique ensures high yields of pure nucleic acids and is scalable for small cell quantities.
Area of Science:
- Molecular Biology
- Biochemistry
- Cell Biology
Background:
- Simultaneous isolation of RNA and DNA is crucial for multi-omic studies.
- Existing methods may compromise yield or purity for one nucleic acid type.
- Efficient extraction from limited cell numbers is often challenging.
Purpose of the Study:
- To develop a streamlined method for co-isolating total cytoplasmic RNA and high molecular weight DNA.
- To ensure high yield and purity of both RNA and DNA.
- To demonstrate the method's efficacy on small cell populations.
Main Methods:
- Gentle cell lysis using NP40 and vanadyl ribonucleoside complex.
- Differential centrifugation to pellet nuclei.
- Phenol/chloroform extraction and ethanol precipitation for RNA purification.
- Proteinase K and SDS digestion followed by salt precipitation for DNA purification.
Main Results:
- High yields of intact cytoplasmic RNA and high molecular weight DNA were achieved.
- The method effectively removed protein contaminants.
- Quantitative extraction was successful from as few as 1000 cells.
Conclusions:
- The described method provides a robust and efficient way to obtain both RNA and DNA from a single cell source.
- This technique is advantageous for applications requiring simultaneous analysis of both nucleic acid types, especially when cell numbers are limited.
- The method offers a valuable tool for molecular biology research, enabling comprehensive cellular analysis.
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