Jun 17, 2016

Aquaporin-1, a New Maternally Expressed Gene, Regulates Placental Development in the Mouse

Biology of Reproduction
Jing GuoQiong Wu


Imprinted genes play an important role in placental and embryonic development. Abnormalities in their regulation can result in placental and embryonic dysplasia, leading to congenital diseases. The imprinting state, expression, and function of aquaporin-1 (Aqp1) were explored in knockout mice by imprinting analysis, real-time PCR, and immunohistochemistry. In the present study, Aqp1 was identified as a new, imprinted, and placenta-specific maternally expressed gene in the mouse. Compared with wild-type Aqp1(+/+) mice, there was significant placental and embryonic overgrowth in Aqp1(-/+) (loss of maternal allele) and Aqp1(-/-) mice, but not in Aqp1(+/-) (loss of paternal allele) mice at Embryonic Day (E) 12.5-E18.5. In addition, the masses of Postnatal Day 0 (P0) embryos (Aqp1(-/-) and Aqp1(-/+)) were highest among the four types. In Aqp1(-/+) and Aqp1(-/-) mice, phenotypic analysis indicated that the number and branching of blood vessels, as well as the labyrinth area, increased significantly in placentae of E12.5-E18.5 mice. Moreover, there were abnormalities in the placental junctional zone and the labyrinthine zone at E15.5. Quantitative analysis showed that Aqp1 expression decreased significantly in the placentae of Aqp1(-/...Continue Reading

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Mentioned in this Paper

Real-Time Polymerase Chain Reaction
Right Bony Labyrinth
Entire Labyrinth
Placenta Specimen