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Multi-organ phenotypes in mice lacking latent TGFβ binding protein 2 (LTBP2)
Nicholas K Bodmer1,2, Russell H Knutsen2, Robyn A Roth2
1Department of Developmental Biology, Washington University School of Medicine, St Louis, Missouri, USA.
Summary
Mice lacking latent TGFβ-binding protein-2 (LTBP2) exhibit altered body weight, fat mass, bone, and skin development. These findings highlight LTBP2
Area of Science:
- Biochemistry
- Developmental Biology
- Extracellular Matrix Research
Background:
- Latent TGFβ-binding protein-2 (LTBP2) is a microfibril component that binds fibrillin-1.
- Unlike other LTBP proteins, LTBP2 does not bind TGFβ isoforms but may influence other LTBP functions or signaling pathways.
Purpose of the Study:
- To investigate the developmental and homeostatic roles of LTBP2.
- To identify phenotypes associated with the absence of LTBP2 in mice.
Main Methods:
- Generation and analysis of mice lacking Ltbp2 (Ltbp2-/-).
- Phenotypic assessment of body weight, fat mass, bone development, and skin development.
Main Results:
- Ltbp2-/- mice display significant alterations in body weight, fat mass, bone, and skin development.
- The strength of skin and bone tissues is differentially impacted by the loss of Ltbp2.
- Tissues with high Ltbp2 expression, like the aorta and lung, showed no developmental or homeostatic phenotype.
Conclusions:
- LTBP2 plays a complex role in development, potentially through direct extracellular matrix (ECM) modulation or interaction with ECM-regulating signaling pathways.
- The absence of LTBP2 leads to specific tissue phenotypes, underscoring its importance in developmental processes.
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