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Nucleofection of Rodent Neuroblasts to Study Neuroblast Migration In vitro
Published on: November 13, 2013
Quantitation and characterisation of poly(A)-containing messenger RNAs from mouse neuroblastoma cells
Abstract:
Comparison of several isolation procedures for neuroblastoma poly(A)-containing mRNAs shows that the highest percentage recovery of undegraded and biologically active messenger RNAs is obtained using proteinase K prior to phenol extraction. The messenger RNAs thus isolated comprise approximately 1.5% of the total ribosomal RNAs and have negligible contamination with 18 and 28 S RNAs. On denaturing polyacrylamide gels they have an average molecular weight of 6.5-10(5) with a range from 2.2-10(5) to 1.53-10(6). The messenger RNAs have an average poly(A) content of 154 nucleotides. They are highly active in wheat germ in vitro protein synthesizing systems, giving as much as 4.3 pmol [35S]methionine incorporation into total protein per mol of mRNA. This is almost as active as a control globin mRNA preparation.
Insights
Proteinase K treatment before phenol extraction yields the best recovery of undegraded neuroblastoma messenger RNAs (mRNAs). These isolated mRNAs are biologically active and suitable for in vitro protein synthesis.
Area of Science:
- Molecular Biology
- Biochemistry
Background:
- Messenger RNAs (mRNAs) are crucial for protein synthesis.
- Efficient isolation of intact and active mRNAs is essential for molecular studies.
- Neuroblastoma mRNA isolation methods require optimization for yield and purity.
Purpose of the Study:
- To compare different isolation procedures for neuroblastoma poly(A)-containing mRNAs.
- To identify the optimal method for obtaining undegraded and biologically active messenger RNAs.
Main Methods:
- Comparison of several mRNA isolation techniques.
- Utilized proteinase K treatment prior to phenol extraction.
- Assessed mRNA integrity, purity, molecular weight, and poly(A) content.
Main Results:
- Proteinase K followed by phenol extraction provided the highest recovery of undegraded, biologically active mRNAs.
- Isolated mRNAs represented ~1.5% of total ribosomal RNA with minimal 18S and 28S rRNA contamination.
- Average mRNA molecular weight was 6.5x10^5 Da, with high activity in in vitro protein synthesis.
Conclusions:
- Proteinase K pre-treatment is superior for isolating high-quality neuroblastoma mRNAs.
- The optimized method yields pure, intact, and highly functional messenger RNAs for research applications.
