Beyond the Mouse: The Mouse Lemur as a New Primate Model for Cardiovascular Research

Area of Science:

• Primate genetics and genomics
• Cardiovascular research
• Model organism development

Background:

• Current mouse models inadequately represent human cardiovascular anatomy, physiology, and disease.
• A need exists for practical model organisms that better mimic human biology.
• Lemur cardiovascular physiology was previously poorly understood.

Purpose of the Study:

• To establish the mouse lemur (Microcebus spp.) as a tractable genetic model organism for biomedical research.
• To investigate primate-specific cardiovascular function and disease.
• To leverage new genomic and cellular resources for enhanced discovery.

Main Methods:

• Systematic phenotypic screening and classical genetic mapping in non-human primates.
• Development and application of a transcriptomic cell atlas for the mouse lemur.
• Generation of a near telomere-to-telomere (T2T), phased diploid genome assembly.

Main Results:

• Identification and genetic mapping of human-like cardiac arrhythmias in mouse lemurs.
• Creation of a comprehensive cell atlas profiling over 4000 cardiac cells and identifying 15 heart cell types.
• Documentation of the first null mutations in lemurs and characterization of their transcriptional phenotypes.
• Generation of a high-quality genome assembly facilitating gene and mutation discovery.

Conclusions:

• The mouse lemur is a valuable and practical model organism for primate biomedical research, particularly for cardiovascular studies.
• Forward and reverse genetic approaches are now feasible in lemurs.
• The established cellular, molecular, and genomic resources provide a robust foundation for future research.