Effect of single MgSO4 injection on brain transcripts in naive and ishemic 5 day-old mice

MgSO4 is given to prevent preterms neurological deficits. We have investigated proper effects and hypoxia-ischemia interfering effects of MgSO4 on transcription in neonate mice at day 5 (a brain development stage mimicking preterm maturity), at neuroprotection dose (600 mg/kg). Pools of RNA from 6 forebrains (3 males and 3 females) were used for total RNA extraction at 5 times post single MgSO4 injection (1.5H, 3H, 6H, 12H, 24H). Separately, MgSO4 effects were assessed post hypoxia-ischemia (3H and 12H). Co-hybridization of MgSO4-treated mRNA (labelled Cy5) and control tissues mRNA (labelled Cy3) were performed on Agilent (design 026655) micro-arrays in 4-7 replicates. Co-hybridization of saline injected (Labelled Cy3) or MgSO4 injected (Labelled Cy5) hypoxia-ischemia (according to Rice Vannucci (RV) procedure) exposed mice brains were performed on Aglient (design 026655) microarrays in triplicates. Two color experiments : MgSO4 treatment (Cy5)/matched time post Phosphate buffer saline injections (Cy3) and Hypoxia-ischmia brains from saline treated (Cy3) and MgSO4 treated (Cy5) mice.