Hacioglu_2021_Biol.Trace.Elem.Res_199_3793

Synaptosomes are used as an ex vivo model in the investigation of neuronal transmission and neurodegenerative processes. In this study, we aimed to determine the protective effects of boric acid (BA) and curcumin, which have antioxidant and anti-inflammatory properties, on Abeta1-42 induced neurodegenerative damage. Synaptosomes obtained from the rat cerebral cortex were divided into five groups: control, 10 microM Abeta1-42, 10 microM Abeta1-42 + 25 mM BA, 10 microM Abeta1-42 + 10 microM curcumin, and 10 microM Abeta1-42 + 25 mM BA+10 microM curcumin. Synaptosomes treated with Abeta1-42 caused a significant decline in synaptophysin levels and increase in malondialdehyde (MDA) levels, acetylcholinesterase (AChE) activities, DNA fragmentation values, and nitric oxide (NO) levels compared with the control group (P<0.01). Synaptosomes treated with BA showed a significant reduction in MDA and NO levels against Abeta1-42 exposure (P<0.01). In addition, curcumin treatment has been found to cause a significant reduction in AChE activities and MDA levels in synaptosomes (P<0.05). Co-administration of BA and curcumin on synaptosomes exposed to Abeta1-42 resulted in a significant decrease in DNA fragmentation values, MDA levels, and AChE activities. Curcumin and BA + curcumin combination showed an enhancement in synaptophysin levels of Abeta1-42-induced synaptosomes (P<0.01). The results showed that BA and curcumin had protective effects on rat brain synaptosomes against Abeta1-42 exposure. BA and curcumin treatment can have abilities to prevent the alterations of the cholinergic system and inhibit oxidative stress in the cerebral cortex synapses of Abeta1-42 exposed.