A method for improving the efficiency of DNA extraction from clotted blood samples

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• Genomic DNA extraction from clotted blood is challenging due to low yield and poor quality.
• Conventional methods often fail to provide acceptable DNA yields from clot samples.
• Developing efficient extraction techniques is crucial for genomic research.

Purpose of the Study:

• To develop a simple and safe method for dispersing blood clots using ball bearing metal shots.
• To improve existing salting-out DNA extraction methods for clotted blood.
• To evaluate the efficiency of the modified method compared to commercial kits.

Main Methods:

• Clotted blood samples were treated with phosphate-buffered saline (PBS) and ball bearing metal shots for clot dispersion.
• Genomic DNA was extracted using a modified salting-out method and compared with a modified and standard QIAamp DNA Blood Midi Kit.
• DNA concentration and quality were assessed using a UV-visible spectrophotometer.

Main Results:

• The modified salting-out method yielded significantly higher amounts of DNA compared to the other methods (P < 0.001).
• DNA purity was also improved with the modified salting-out approach.
• The extracted DNA was suitable for downstream applications like PCR and gel electrophoresis.

Conclusions:

• The proposed modified salting-out method offers a simple, efficient, and low-cost solution for isolating genomic DNA from old blood clots.
• This technique is easy to implement in routine laboratory settings.
• The method enhances DNA yield and purity, facilitating genomic research.