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Sachan, Nalani; Phoon, Colin K.L.; Zilberberg, Lior; Kugler, Matthias C.; Ene, Taylor; Mintz, Shana B.; Murtada, Sae-Il; Weiss, Dar; Fishman, Glenn I.; Humphrey, Jay D.; Rifkin, Daniel B.
Matrix biology, 08/2023, Letnik: 121Journal Article
•TGF beta2 heterozygosity synergizes with fibrillin1 hypomorphism to cause early death in mice.•Death is not from dissection and rupture.•Mortality is associated with abnormal aortic valves. To assess the contribution of individual TGF-β isoforms to aortopathy in Marfan syndrome (MFS), we quantified the survival and phenotypes of mice with a combined fibrillin1 (the gene defective in MFS) hypomorphic mutation and a TGF-β1, 2, or 3 heterozygous null mutation. The loss of TGF-β2, and only TGF-β2, resulted in 80% of the double mutant animals dying earlier, by postnatal day 20, than MFS only mice. Death was not from thoracic aortic rupture, as observed in MFS mice, but was associated with hyperplastic aortic valve leaflets, aortic regurgitation, enlarged aortic root, increased heart weight, and impaired lung alveolar septation. Thus, there appears to be a relationship between loss of fibrillin1 and TGF-β2 in the postnatal development of the heart, aorta and lungs.
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in: SICRIS
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