Meester-Loeys Syndrome

Adv Exp Med Biol. 2021;1348:265-272. doi: 10.1007/978-3-030-80614-9_12.


Meester-Loeys syndrome is an X-linked form of syndromic thoracic aortic aneurysm, characterized by the involvement of multiple organ systems. More specifically, the cardiovascular, skeletal, craniofacial, cutaneous and neurological systems are affected. Clear clinical overlap with Marfan syndrome and Loeys-Dietz syndrome is observed. Aortic dissections occur typically at young ages and are most often observed in males. Meester-Loeys syndrome is caused by loss-of-function mutations in BGN, encoding the small leucine-rich proteoglycan biglycan. Although functional consequences of these mutations remain largely elusive, increased TGF-β signaling has been observed. Novel insights will provide opportunities for preventive therapeutic interventions.

Keywords: Aortic dissection; Biglycan; Connective tissue disorder; Loeys-Dietz syndrome; Loss-of-function mutations; Marfan syndrome; Meester-Loeys syndrome; Thoracic aortic aneurysm.

MeSH terms

  • Aortic Aneurysm, Thoracic*
  • Aortic Dissection*
  • Humans
  • Loeys-Dietz Syndrome* / diagnosis
  • Loeys-Dietz Syndrome* / genetics
  • Male
  • Marfan Syndrome*
  • Mutation