| First Author | Li X | Year | 2011 |
| Journal | Am J Obstet Gynecol | Volume | 205 |
| Issue | 1 | Pages | 84.e1-6 |
| PubMed ID | 21529760 | Mgi Jnum | J:357669 |
| Mgi Id | MGI:7763906 | Doi | 10.1016/j.ajog.2011.02.071 |
| Citation | Li X, et al. (2011) SOD1 overexpression in vivo blocks hyperglycemia-induced specific PKC isoforms: substrate activation and consequent lipid peroxidation in diabetic embryopathy. Am J Obstet Gynecol 205(1):84.e1-6 |
| abstractText | OBJECTIVE: Oxidative stress plays a causative role in diabetic embryopathy. We tested whether mitigating oxidative stress, using superoxide dismutase 1 (SOD1) transgenic (Tg) mice, would block hyperglycemia-induced specific protein kinase C (PKC) isoform activation and its downstream cascade. STUDY DESIGN: Day 8.5 embryos from nondiabetic wild-type control (NC), diabetic mellitus wild-type (DM), and diabetic SOD1-Tg mice (DM-SOD1-Tg) were used for detection of phosphorylated (p-) PKCalpha/betaII and p-PKCdelta, and levels of 2 prominent PKC substrates, phosphorylated myristoylated alanine-rich protein kinase C substrate (MARCKS) and receptor for activated C kinase 1 (RACK1), and lipid peroxidation markers, 4-hydroxynonenal (4-HNE) and malondialdehyde (MDA). RESULTS: Levels of p-PKCalpha/betaII, p-PKCdelta, p-MARCKS, 4-HNE, and MDA were significantly elevated in the DM group compared with those in the NC group and the DM-SOD1-Tg group. The NC and DM-SOD1-Tg groups had comparable levels of these protein and lipid peroxidation markers. RACK1 levels did not differ among the 3 groups. CONCLUSION: Mitigating oxidative stress by SOD1 overexpression blocks maternal hyperglycemia-induced activation of specific PKC isoforms and downstream cascades. |
