alexa Placental abruption is more frequent in women with the angiotensinogen Thr235 mutation.
Genetics

Genetics

Advancements in Genetic Engineering

Author(s): Zhang XQ, Craven C, Nelson L, Varner MW, Ward KJ

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Abstract OBJECTIVE: Obstetrical complications such as preeclampsia, fetal growth restriction, and placental abruption are associated with inadequate placental perfusion. Previous studies have shown that the angiotensinogen (AGT) Thr235 mutation is associated with abnormal remodeling of the uterine spiral arteries and occurs at higher frequencies in preeclampsia. This study was done to evaluate whether the AGT Thr235 mutation increases the risk of placental abruption. MATERIALS AND METHODS: We compared 62 placentas from women who had placental abruption with 240 control patients of similar age and ethnicity. DNA was extracted from paraffin blocks from placentas. AGT Met235Thr mutation status was determined by single fluoresceine labeled probe real-time PCR using a LightCycler system. RESULT: AGT genotypes were divided into three groups: MM (homozygous wild), TT (homozygous mutant), and MT (heterozygous). The constituent ratio of AGT genotype in abrupted placentas (MM 14.5\%, MT 43.5\%, TT 41.9\%) was significantly different from in control group (MM42.5\%, MT 39.6\%, TT 17.9\%) (p<0.001). AGT mutant allele frequency in placental abruption (0.637) was significantly higher than in the control group (0.377) (p<0.001). CONCLUSION: The AGT Thr235 mutation was observed more frequently in placental abruption. AGT Thr235 mutation may be considered a risk factor for placental abruption. This article was published in Placenta and referenced in Advancements in Genetic Engineering

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