Genetic markers in human bone: I. Deoxyribonucleic acid (DNA) analysis

Area of Science:

• Forensic Science
• Molecular Biology
• Genetics

Background:

• Deoxyribonucleic acid (DNA) analysis is crucial for human identification.
• Bone tissue is often the only biological material available for DNA extraction in forensic cases.
• Assessing the quality and quantity of DNA from bone is essential for reliable results.

Purpose of the Study:

• To evaluate the efficacy of DNA isolation from human bone tissue.
• To compare DNA typing results from bone and blood samples.
• To determine the suitability of bone-derived DNA for various genetic analyses.

Main Methods:

• DNA extraction from spongy and compact human bone tissue, and blood.
• Quantification and degradation assessment using spectrophotofluorometry and ethidium bromide visualization.
• DNA typing using restriction fragment length polymorphism (RFLP) and polymerase chain reaction (PCR) amplification for human leucocyte antigen (HLA)-DQ alpha and apolipoprotein B (APOB) gene polymorphisms.

Main Results:

• DNA was successfully isolated from human bone tissue, with yield estimated per milligram of starting tissue.
• Concordant RFLP typing results were obtained from several blood-bone DNA pairs using different protocols and probes.
• Concordant HLA-DQ alpha and APOB VNTR polymorphism results were achieved from blood-bone pairs using PCR-based methods.

Conclusions:

• Human bone tissue is a reliable source for DNA isolation and genetic analysis.
• DNA extracted from bone provides concordant typing results compared to blood DNA.
• Bone-derived DNA is suitable for forensic identification using RFLP, HLA, and VNTR analyses.