# CAS researchers develop Msc-RRBS method for single-cell DNA methylation analysis

- Published: 2026-11-07 04:02 UTC
- Section: Life & Health › Biotechnology
- Tags: Msc-RRBS protocol, single cell DNA methylation, Nature Protocols CAS, SingleCellMethPipe, epigenetic heterogeneity
- URL: https://realtech.media/news/rt-be2b3f8ae59aac03f828aa05_cas_researchers_develop/

**A streamlined protocol performs all enzymatic steps in a single microwell, cutting DNA loss and sequencing hundreds of single cells in six days.**

![CAS researchers develop Msc-RRBS method for single-cell DNA methylation analysis](https://realtech.media/media/2026/11/03889b978c34b503.jpg)
*Labrat879, Wikimedia Commons, CC BY-SA 4.0*

Researchers from the Hefei Institutes of Physical Science at the Chinese Academy of Sciences have developed a multiplexed single-cell reduced-representation bisulfite sequencing protocol, termed Msc-RRBS. The method enables parallel genome-wide DNA methylation profiling of hundreds of individual cells, pooled cells, or sub-nanogram amounts of purified genomic DNA. According to the protocol published in Nature Protocols, the full experimental workflow—from initial cell sorting to sequencing-ready libraries and baseline data analysis—takes approximately six days for one or more 96-well plates [1].

## Single-microwell reactions and barcoding

Conventional bulk RRBS measures average epigenetic marks across thousands of cells, which masks cell-to-cell heterogeneity during differentiation and oncogenesis. Single-cell variants often suffer from material loss due to repeated tube transfers and buffer exchanges. In the Msc-RRBS workflow, all core enzymatic steps—including cell lysis, restriction enzyme digestion, end repair, and adapter ligation—are carried out consecutively in a single microwell without intermediate buffer replacement [1].

The protocol utilizes short, indexed adapters that reduce adapter dimer formation and facilitate library purification using magnetic bead clean-up. Molecular barcoding enables the pooling of 24 single-cell samples for multiplexed downstream processing, significantly decreasing reagent consumption and hands-on time [1]. Data processing is supported by SingleCellMethPipe, an automated pipeline developed by the authors to handle raw read alignment, methylation pattern extraction, and quality control metrics.

## Validation on hematopoietic stem cells

To test the workflow on clinical specimens, the team profiled 96 individual blood-forming stem and progenitor cells isolated from a healthy donor and a patient diagnosed with myelodysplastic syndrome. Following sequencing and algorithmic evaluation, 86 single-cell libraries satisfied quality control thresholds, yielding an experimental success rate of 89.6% [1].

The resulting datasets resolved epigenetic divergence between cell subpopulations and highlighted distinct methylation signatures distinguishing normal hematopoiesis from myelodysplastic syndrome cells. Standard execution of the wet-lab protocol requires basic molecular biology training, while the accompanying software pipeline processes raw read outputs without advanced bioinformatics infrastructure [1].

## Sources

1. [Nature Protocols](https://doi.org/10.1038/s41596-026-01452-9)
2. [EurekAlert](https://www.eurekalert.org/news-releases/1150853)

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Source: RealTech, realtech.media — https://realtech.media/news/rt-be2b3f8ae59aac03f828aa05_cas_researchers_develop/