A single-cell transcriptomic atlas characterizes the silk-producing organ in the silkworm

Area of Science:

• Developmental Biology
• Genomics
• Molecular Biology

Background:

• The silkworm (Bombyx mori) silk gland produces high-quality silk, but the specific cells and regulatory mechanisms for silk protein synthesis remain unclear.
• Understanding cell heterogeneity and gene expression dynamics is crucial for deciphering silk production processes.

Purpose of the Study:

• To create a comprehensive single-cell atlas of the silkworm silk gland.
• To identify distinct cell types, their spatial distribution, and developmental trajectories.
• To discover novel marker genes regulating silk gland development and silk protein synthesis.

Main Methods:

• Single-cell RNA sequencing (scRNA-seq) was employed to analyze 14,972 high-quality cells.
• Cell types were annotated, and their distributions within the silk gland were mapped across three early developmental stages.
• Gene expression patterns and developmental trajectories were decoded.

Main Results:

• A cell atlas comprising 10 distinct cell types was constructed.
• The spatial distribution and developmental dynamics of these cell types were elucidated.
• Key marker genes involved in silk gland development and silk protein synthesis were identified.

Conclusions:

• This research provides unprecedented insight into the cellular heterogeneity and gene expression dynamics of the silkworm silk gland at the single-cell level.
• The identified cell types and marker genes offer a foundation for further investigation into silk production mechanisms and potential applications.