PRKAA1 is decreased in placental tissues of women with GDM. Western blot analysis was used to measure the protein level of PRKAA1 in placental tissues of women without GDM (n=11) and with GDM (n=11). β-actin (~43 kDa) was used as the internal control. The relative density of PRKAA1 (~62 kDa) was determined with Image Pro Plus version 6.0 software. (A) Representative protein bands of PRKAA1 and β-actin in placental biopsies of five normal pregnant women and five women with GDM. (B) Relative density of PRKAA1 in placental tissues of the normal (n=11) and GDM (n=11) groups. Data are expressed as the mean ± standard error of the mean; statistical significance was determined using Student's t-test, *P<0.05. GDM, gestational diabetes mellitus; PRKAA1, protein kinase AMP-activated catalytic subunit α1; N, normal; G, GDM.