Project description:Reconstruction of ancient epigenomes by DNA methylation (DNAm) can shed light into the composition of cell types, disease states, and age at death. However, such analysis is hampered by impaired DNA quality and little is known how decomposition affects DNAm. In this study, we determined if EPIC Illumina BeadChip technology is applicable for specimen from mummies of the 18th century CE. Overall, the signal intensity on the microarray was extremely low, but for one of two samples we detected characteristic DNAm signals in a subset of CG dinucleotides (CpGs), which were selected with a stringent processing pipeline. Using only these CpGs we could train epigenetic signatures with reference DNAm profiles of multiple tissues and our predictions were in line with the fact that the specimen was lung tissue of a female 28-year-old donor. Thus, we provide proof of principle that Illumina BeadChips are applicable for DNAm profiling in ancient samples.

2021-08-04 | GSE169595 | GEO

Genomic Analysis of 18th-Century Kazakh Individuals and Their Oral Microbiome.

Project description: Not available

| S-EPMC8698332 | biostudies-literature