Эрдэмтэд түүхэн дурсгалт гар бичмэлүүдийн бүтцийг өөрчлөхгүйгээр дотор нь хадгалагдаж буй биологийн мэдээллийг олж авах шинэ аргыг боловсруулжээ.
Судлаачид Дьюкийн их сургуулийн Рубенштейний номын санд хадгалагдаж буй VIII зуунаас XX зууны эхэн үед хамаарах 91 гар бичмэл дээр уг аргыг туршсан байна. Тэд пергамент буюу амьтны арьсан дээр бичигдсэн эдгээр баримтыг огтлох, хусахын оронд эмнэлгийн зориулалттай хуурай сойз ашиглан гадаргуугаас нь эсийн дээж авчээ. Ийнхүү авсан дээжийг орчин үеийн удамшлын дараалал тогтоох (next-generation sequencing) технологиор шинжилснээр олдворын бүрэн бүтэн байдлыг алдагдуулахгүйгээр үнэтэй мэдээлэл цуглуулах боломжтой болсон байна.
Энэхүү судалгааны багийн гишүүн, Хойд Каролинагийн их сургуулийн дэд профессор Тим Стинсоны тайлбарласнаар, пергамент нь амьтны арьсаар хийгддэг тул тухайн амьтны ДНХ-ийн мэдээллийг өөртөө хадгалж үлддэг. Энэхүү генетикийн өгөгдөл нь гар бичмэл хэзээ, хаана бүтээгдсэнийг тогтоохоос гадна тухайн үеийн мал аж ахуйн хөгжил, малын үүлдэр угсаа, өвчин эмгэгийн тархалт зэргийг судлах түүхийн ховор эх сурвалж болж байна.
Судалгааны багийнхан энэ арга нь түүхэн дурсгалт зүйлсийг хадгалж буй байгууллагуудад итгэл төрүүлж, цаашид судалгааны ажлыг өргөжүүлэхэд чухал алхам болно гэж үзэж байна. Одоогийн байдлаар энэхүү салбар нь шинжлэх ухааны хувьд нээгдээгүй том орон зай хэвээр байгаа бөгөөд генетик болон түүхийн ухааныг холбосон салбар дундын судалгааг үргэлжлүүлэхээр төлөвлөж байна.
Дэлгэрэнгүйг эх сурвалжаас харах
↓Эх сурвалжийг нээх ↓
For centuries, parchment manuscripts have preserved far more than the words written on their pages. Researchers have now uncovered a hidden layer of biological information locked inside these historic documents, opening a new avenue for studying the past without compromising the artifacts themselves.
Historic parchments have long fascinated historians for the stories recorded in their text. Yet the material used to create them has remained largely overlooked. Scientists have now found a way to investigate that forgotten record while leaving manuscripts that have survived for centuries completely intact.
Parchment was widely used across Europe, the Middle East, and parts of Africa for legal records, religious texts, maps, and administrative documents. Made from animal skins, these manuscripts also retain biological traces from the animals that supplied the material. As reported in Manuscript Studies: A Journal of the Schoenberg Institute for Manuscript Studies, researchers have shown that this hidden archive can now be accessed through modern DNA sequencing techniques without damaging the documents.
A Simple Brush Makes DNA Sampling Easier
To evaluate the technique, the research team analyzed 91 historic manuscripts preserved at Duke University’s Rubenstein Library. The collection included documents originating from England, Ethiopia, and other regions, with dates ranging from the late eighth century to the early twentieth century.
Rather than cutting or scraping the parchment, researchers gently rubbed its surface with a dry cytology brush, the same type commonly used for Pap smears. The brush collected cellular material while leaving the manuscripts intact. Matthew Breen, co-author of the study, added that:
“Cytology brushes can be used when dry and do an excellent job of harvesting cellular material without damaging the integrity of the artifact being sampled.”
After collection, scientists extracted the cells and analyzed them using forensic-level next-generation sequencing technologies. These methods recovered and amplified genetic sequences suitable for detailed analysis without altering the condition of the historic documents.
Ancient Parchments Preserve More Than Written History
As explained in the latest research, the value of parchment extends well beyond the words written on its surface. Since the material originates from animal skins, it retains DNA that can help answer historical questions about the manuscripts themselves.
“That genetic information, in turn, offers us a window into the past, answering questions about things such as when and where a manuscript was made.” explained Tim Stinson, the study’s corresponding author and an associate professor of English at North Carolina State University.
The DNA preserved in parchment has value beyond the manuscripts themselves. As mentioned in a press release published by NC State University, it could reveal how farm animals evolved, how livestock breeds developed over the centuries, and how diseases spread among them.
The written content of many parchments already documents historical events, legal agreements, or religious practices. Their preserved DNA now offers an additional layer of evidence that can be examined alongside the text, creating a richer historical resource.
Historic Collections Could Soon Be Easier to Study
One of the main challenges facing parchment genetics has been gaining access to rare manuscripts. Libraries, archives, and museums have understandably been cautious about allowing scientific sampling because of concerns that valuable artifacts could be damaged during the process.
The research team demonstrated that cellular material can be collected without affecting the integrity of the parchment. Stinson described this achievement as “a big step forward,” noting that the method could help reassure institutions responsible for preserving culturally significant collections.
“We’ve shown that we’re able to extract a tremendous amount of new information from these parchments without harming them,” said Breen. “This will hopefully engender trust with those organizations that are responsible for preserving these historic documents.”
The study team also stressed that the field remains largely unexplored. Stinson said the team is seeking funding to continue investigating what he called “a vast, untapped source of historical information.”
“We have a remarkable opportunity here. It is essentially a whole new field, bringing together a truly interdisciplinary range of expertise spanning fields from genetics to medieval history,” he concluded.
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