New recessive truncating mutation in LTBP3 in a family with oligodontia, short stature, and mitral valve prolapse.

Latent TGFB-binding protein 3 (LTBP3) is known to increase bio-availability of TGFB. A homozygous mutation in this gene has previously been associated with oligodontia and short stature in a single family. We report on two sisters with homozygous truncating mutations in LTBP3. In addition to oligodontia and short stature, both sisters have mitral valve prolapse, suggesting a link between truncating LTBP3 mutations and mitral valve disease mediated through the TGFB pathway.