02973nas a2200277   4500008004100000022001400041245012000055210006900175260000800244300002100252490000700273520204300280653002102323653002202344653001502366653001402381653001402395653002202409653000902431653001402440653002902454100001602483700002802499700003602527856013202563       2020                        eng d  a1759-091400aMelatonin reduces GSK3 beta-mediated tau phosphorylation, enhances Nrf2 nuclear translocation and anti-inflammation0 aMelatonin reduces GSK3 betamediated tau phosphorylation enhances  cDEC  a17590914209812040 v123 a<p>Alzheimer's disease is a neuropathological condition with abnormal accumulation of extracellular Amyloid-beta plaques and intracellular neurofibrillary tangles of Microtubule-associated protein Tau (Tau) in the brain. In pathological conditions, Tau undergoes post-translational modifications such as hyperphosphorylation by the activity of cellular kinases, which eventually leads to protein aggregation in neurons. Melatonin is a neuro-hormone that is mainly secreted from the pineal gland and functions to modulate the cellular kinases. In our study, we have checked the neuroprotective function of Melatonin by MTT and LDH assay, where Melatonin inhibited the Tau aggregates-mediated cytotoxicity and membrane leakage in Neuro2A cells. The potency of Melatonin has also been studied for the quenching of intracellular reactive oxygen species level by DCFDA assay and caspase 3 activity. Melatonin was shown to reduce the GSK3 beta mRNA and subsequent protein level as well as the phospho-Tau level (pThr181 and pThr212-pSer214) in okadaic acid-induced Neuro2A cells, as observed by western blot and immunofluorescence assay. Further, Melatonin has increased the cellular Nrf2 level and its nuclear translocation as an oxidative stress response in Tauopathy. The Melatonin was found to induce pro- and anti-inflammatory cytokines levels in N9 microglia. The mRNA level of cellular kinases such as as-GSK3 beta, MAPK were also studied by qRT-PCR assay in Tau-exposed N9 and Neuro2A cells. The immunomodulatory effect of Melatonin was evident as it induced IL-10 and TGF-beta cytokine levels and activated MAP3K level in Tau-exposed microglia and neurons, respectively. Melatonin also downregulated the mRNA level of pro-inflammatory markers, IL-1 beta and Cyclooxygenase-2 in N9 microglia. Together, these findings suggest that Melatonin remediated the cytokine profile of Tau-exposed microglia, reduced Tau hyperphosphorylation by downregulating GSK3 beta level, and alleviated oxidative stress via Nrf2 nuclear translocation.</p>
10aAlzheimer&\#821710aAnti-inflammatory10aGSK3&\#94610amelatonin10amicroglia10aneurodegeneration10aNrf210as disease10aTau hyperphosphorylation1 aDas, Rashmi1 aBalmik, Abhishek, Ankur1 aChinnathambi, Subashchandrabose  uhttps://library.ncl.res.in/content/melatonin-reduces-gsk3-beta-mediated-tau-phosphorylation-enhances-nrf2-nuclear-translocation02240nas a2200277   4500008004100000022001400041245007900055210006900134260000800203300001100211490000800222520137500230653002001605653001501625653000901640653002201649653001101671653002001682653002401702100001801726700002101744700002301765700002701788700003601815856011101851       2023                        eng d  a0141-813000aBacopa monnieri reduces Tau aggregation and Tau-mediated toxicity in cells0 aBacopa monnieri reduces Tau aggregation and Taumediated toxicity  cAPR  a1231710 v2343 a<p>
	Alzheimer's disease is a neurodegenerative disease characterized by progressive memory loss and behavioral impairments. In the present study, the ethanolic extract of Bacopa monnieri was studied for its potency to inhibit Tau aggregation and rescuing of the viability of Tau-stressed cells. Bacopa monnieri was observed to inhibit the Tau aggregation in vitro. The cells exposed to Bacopa monnieri were also observed to have a low level of ROS and caspase-3 activity. The immunoblot and immunofluorescence analysis showed that Bacopa monnieri acts as an antioxidant and restored the Nrf2 levels in Neuro2a cells. Bacopa monnieri treatment to Neuro2a cells was observed to reduce the phospho-Tau load in formaldehyde-stressed cells. Furthermore, the treatment of Bacopa monnieri reduced the phosphorylation of GSK-3 beta in formaldehyde-stressed cells. Ran and NUP358 are the key proteins involved in nuclear transport. It was observed that formaldehyde treatment impaired the nuclear transport by missorting the NUP358 arrangement in Neuro2a cells. On the contrary, Bacopa monnieri treatment restored the NUP358 arrangement in cells. The overall results of the present study suggested that Bacopa monnieri could be considered a potent herb against Tau phosphorylation and Tau aggregation, which projects it as a promising formulation for Alzheimer's disease.</p>
10aBacopa monnieri10aGSK-3 beta10aNrf210aNuclear transport10aNUP35810aTau Aggregation10aTau phosphorylation1 aDubey, Tushar1 aKushwaha, Preeti1 aThulasiram, H., V.1 aChandrashekar, Madhura1 aChinnathambi, Subashchandrabose  uhttps://library.ncl.res.in/content/bacopa-monnieri-reduces-tau-aggregation-and-tau-mediated-toxicity-cells