Considerations for RNA-seq analysis of circadian rhythms

Area of Science:

• Molecular Biology
• Genomics
• Chronobiology

Background:

• Circadian rhythms govern daily physiological and behavioral cycles.
• Molecular basis involves core clock genes and clock-controlled genes (CCGs).
• Identifying CCGs is crucial for understanding circadian clock influence on health.

Purpose of the Study:

• To provide practical recommendations for studying circadian rhythms using genome-scale transcriptional profiling.
• To address technical challenges associated with RNA sequencing in circadian research.
• To guide researchers in designing experiments for analyzing large, complex circadian datasets.

Main Methods:

• Discussion of considerations for RNA sequencing in circadian studies.
• Emphasis on practical recommendations for experimental design.
• Utilizing computational simulations and prior research experience.

Main Results:

• Recommendations cover sampling density, read depth, alignment, normalization, and cycling detection algorithms.
• Guidelines are based on computational simulations and empirical experience.
• Aimed at improving the analysis of rhythmically expressed mRNAs.

Conclusions:

• RNA sequencing offers powerful tools for circadian biology research.
• Adhering to recommended practices enhances data quality and interpretation.
• Facilitates systematic identification and characterization of CCGs.