Clinical Scorecard: Hidden DNA Complicates Shroud Analysis

At a Glance

Key Highlights

• Researchers analyzed 12 specimens from an official collection obtained in 1978; seven yielded enough DNA for sequencing.
• More than 98% of the short DNA fragments lacked molecular damage patterns generally associated with ancient DNA, and testing identified modern DNA contamination.
• The predominant mitochondrial lineage matched that of sample collector Pierluigi Baima Bollone; genome-wide analysis linked DNA in three samples to him or a first-degree relative.
• Microbial, plant, and animal DNA indicated varied sources, including repeated handling and at least some relatively recent contamination.
• The researchers concluded that metagenomic testing could not determine whether the Shroud was medieval or approximately 2,000 years old.

Guideline-Based Recommendations

Diagnosis

• The study used clean-room DNA extraction, shotgun next-generation sequencing, mitochondrial DNA analysis, metagenomic profiling, and bioinformatics to characterize sample DNA.

Management

Monitoring & Follow-up

Risks

• Sample history, handling, environmental exposure, and modern contamination can complicate molecular analysis of historical material.
• Mixed genetic material prevented researchers from linking the DNA to an original individual or determining when it was deposited.

Patient & Prescribing Data

Not applicable; no patients or treatments were studied.

Not applicable; the article reports laboratory analysis of artifact samples, not treatment or prescribing data.

Clinical Best Practices

• The study used clean-room conditions and a method designed for highly fragmented genetic material.
• The researchers assessed contamination and interpreted DNA findings alongside microbial, plant, animal, and proteomic results.
• The two radiocarbon-dated linen threads were associated with documented repairs in 1534 and 1694 and were not used to determine the age of the Shroud itself.

Related Resources & Content

• Scientific Reports study described in the article