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Objective: To investigate the altered expression of lipid metabolism-related gene adipose differentiation-related protein (ADRP) in pre-eclampsia. Methods: Semi-quantitative RT-PCR and Western blotting were used to validate the altered expression of ADRP gene between pre-eclamptic placentas (preeclampsia group) and normotensive placentas (control group) respectively. In situ hybridization (ISH)was used to localize ADRP mRNA in pre-eclamptic placentas. Results: There was a significant difference in the levels of placental ADRP mRNA between pre-eclampsia group and control group (1.98± 0. 50 vs 1. 09±0. 20, P＜0.01). Western blotting showed that placentas both in pre-eclampsia group and control group expressed the special ADRP band at 48. 1 kD. The relative levels of ADRP protein in pre-eclampsia group were significantly higher than those of control group (0. 40 ±0. 19 vs 0. 19 ±0. 09, P＜ 0. 01).ADRP mRNA was diffusely distributed in pre-eclamptic placentas. Their positive staining existed in cytoplasm of trophoblast. Conclusion: Abnormal expression of ADRP gene in pre-eclamptic placenta may be associated with the pathogenesis of pre-eclampsia.