Prenatal Curcumin Administration Reverses Behavioral and Neurochemical Effects and Decreases iNOS and COX-2 Expressions in Ischemic Rat Pups

Abstract

The objectives were to evaluate alterations in ischemic rat pups, from dams administered with curcumin (25 and 50 mg/kg). Ten-day-old male pups were subjected or not (SO) to brain ischemia and reperfusion, for 1, 7, and 14 days (this last group was submitted to behavioral evaluation). After that, pups were euthanized for determinations of striatal DA and DOPAC in SO, ischemic from untreated (ICUD) or curcumin treated (ICTD) dams, as well as hippocampal immunohistochemistry assays for iNOS and COX-2 and cresyl violet staining. At the 14th postischemia day, the ICUD group showed increased locomotor activity and rearing behavior, which were reversed in ICTD animals. ICUD pups presented decreased striatal DA and DOPAC levels, relatively to SO, mainly at the 1st postischemia day, but also at the 7th and 14th days which were partially reversed in ICTD pups. A greater number of viable neurons were observed in ICTD, as related to the ICUD group. Ischemia increased iNOS and COX-2 expressions, in CA1 and CA3 areas, at the 1st, 7th, and 14th postischemia days, and these effects were minimized in ICTD pups. In conclusion, the prenatal curcumin treatment was shown to be neuroprotective where the drug anti-inflammatory and antioxidant effects probably play a role.

Resveratrol mitigates the oxidative stress mediated by hypoxic-ischemic brain injury in neonatal rats via Nrf2/HO-1 pathway

“…Nissl bodies (staining with cresyl violet) are an indicator of neuronal integrity and may be lost during neuronal damage, which aids in determining the number of viable neurons (Telles et al. 2014 ). Marked neuronal changes were observed in HI insulted rats with increased pyknotic neurons and less visible Nissl bodies (increased neuronal death).…”

Neurotherapeutic effect of mangiferin against hypoxic–ischemic encephalopathy in neonatal rats

“…Our results are well supported by Tan and his coworkers (2011), also pointed out that MF can effectively reduce the cerebral infarct size in a cerebral ischemic rat model by improving the antioxidant status and thus preserving the integrity of BBB. The degree of ischemic neuronal injury was determined by checking the number of normal motor neurons using cresyl violet staining procedure based on the presence of nissl bodies (Telles et al, 2014). Enormous changes in neuronal morphology were noticed in a hypoxic-ischemic group with pyknotic neurons as well as few visible nissl bodies, thus indicating the neurotoxicity in HI insult condition with reduced viable neuronal cells.…”