The mouse Pdgfc gene: dynamic expression in embryonic tissues during organogenesis

Area of Science:

• Developmental Biology
• Molecular Biology
• Genetics

Background:

• Platelet-derived growth factors (PDGF-A, PDGF-B) and their receptors (PDGFR-alpha, PDGFR-beta) are vital for cardiovascular, kidney, lung, and central nervous system development.
• A novel mouse cDNA encoding a protein with 95% identity to human PDGF-C was isolated.

Purpose of the Study:

• To characterize the expression pattern of the mouse Pdgfc gene during embryonic development.
• To compare the expression of Pdgfc with other PDGF family members.

Main Methods:

• cDNA isolation and sequencing.
• Amino acid sequence comparison with human PDGF-C.
• In situ hybridization or similar techniques to determine Pdgfc mRNA expression in E9.5-E15.5 mouse embryos.

Main Results:

• Mouse Pdgfc shares 95% amino acid identity with human PDGF-C.
• Mouse Pdgfc gene is located on chromosome 17, syntenic to human 6p21.3.
• Pdgfc exhibits broad expression in embryonic ectoderm, skin, placodes, oral cavity, gut, lung, kidney, and muscle precursors.
• Unlike PDGF-A, Pdgfc is largely absent from the central nervous system, heart, and vascular endothelium, with exceptions in the cerebellum and neural crest derivatives.

Conclusions:

• Pdgfc is a novel PDGF family member with a distinct expression profile during mouse embryogenesis.
• Its expression pattern suggests roles in the development of ectodermal appendages, sensory organs, oral cavity, gut, and musculoskeletal system.
• The differential expression compared to other PDGFs highlights unique functions of Pdgfc in specific developmental pathways.