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memory, curcumin

Nermeen Mohammed Faheem, Ahmad El Askary
OBJECTIVES: Diabetes mellitus causes impaired memory and cognitive functions. The hippocampus plays a key role in memory and learning. Curcumin attenuates diabetic nephropathy in vivo. Curcumin has shown a neurogenic effect and cognition-enhancing potential in aged rats. The aim of this study is to evaluate the possible protective role of curcumin on the histological and serological changes of the hippocampus in diabetic rats. MATERIALS AND METHODS: Forty albino rats were divided into four groups, ten rats each...
June 2017: Iranian Journal of Basic Medical Sciences
Taysa B Bassani, Joelle M Turnes, Eric L R Moura, Jéssica M Bonato, Valentín Cóppola-Segovia, Silvio M Zanata, Rúbia M M W Oliveira, Maria A B F Vital
Curcumin is a natural polyphenol with evidence of antioxidant, anti-inflammatory and neuroprotective properties. Recent evidence also suggests that curcumin increases cognitive performance in animal models of dementia, and this effect would be related to its capacity to enhance adult neurogenesis. The aim of this study was to test the hypothesis that curcumin treatment would be able to preserve cognition by increasing neurogenesis and decreasing neuroinflammation in the model of dementia of Alzheimer's type induced by an intracerebroventricular injection of streptozotocin (ICV-STZ) in Wistar rats...
August 8, 2017: Behavioural Brain Research
Ali Noorafshan, Fatemeh Karimi, Saied Karbalay-Doust, Ali Mohammad Kamali
Sleep Deprivation (SD) is known to result in a range of neurological consequences in chronically-afflicted subjects. Curcumin, a natural substance, has neuroprotective properties. This study aimed to evaluate the effects of curcumin on the medial Prefrontal Cortex (mPFC) of SD rats. Male rats were arbitrarily assigned to nine groups, including control, curcumin (100 mg/kg/day), olive oil, SD, SD+curcumin, SD+olive oil, grid, grid+curcumin, and grid+olive oil groups. SD was induced by a multiplatform box containing water...
2017: EXCLI journal
Fu-Chun Zhao, Yan Wu, Xiao-Jie Song
BACKGROUND Cognitive decline (e.g., memory loss), which mainly occurs in the elderly, is termed dementia. In the present study, we intended to explore the cholinesterase inhibitory activity of some novel synthesized chalcones, together with their effect on β-amyloid anti-aggregation. MATERIAL AND METHODS A novel class of chalcone derivatives have been synthesized and characterized by FT-IR, ¹H-NMR, ¹³C-NMR, and mass and elemental analysis. These derivatives were later used for the determination of acetylcholinesterase (AChE) inhibitory and b-amyloid anti-aggregation activity...
July 8, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Xianchan Li, Amir Saeid Mohammadi, Andrew G Ewing
We used single cell amperometry to examine whether curcumin and bisdemethoxycurcumin (BDMC), substances that are suggested to affect learning and memory, can modulate monoamine release from PC12 cells. Our results indicate both curcumin and BDMC need long-term treatment (72 h in this study) to influence exocytosis effectively. By analyzing the parameters calculated from single exocytosis events, it can be concluded that curcumin and BDMC affect exocytosis through different mechanisms. Curcumin accelerates the event dynamics with no significant change of the monoamine amount released from single exocytotic events, whereas BDMC attenuates the amount from single exocytotic event with no significant change of the event dynamics...
November 15, 2016: Journal of Electroanalytical Chemistry
Pengwen Wang, Caixin Su, Huili Feng, Xiaopei Chen, Yunfang Dong, Yingxue Rao, Ying Ren, Jinduo Yang, Jing Shi, Jinzhou Tian, Shucui Jiang
Recent studies have shown the therapeutic potential of curcumin in Alzheimer's disease (AD). In 2014, our lab found that curcumin reduced Aβ40, Aβ42 and Aβ-derived diffusible ligands in the mouse hippocampus, and improved learning and memory. However, the mechanisms underlying this biological effect are only partially known. There is considerable evidence in brain metabolism studies indicating that AD might be a brain-specific type of diabetes with progressive impairment of glucose utilisation and insulin signalling...
March 2017: International Journal of Immunopathology and Pharmacology
Ayodele Jacob Akinyemi, Ganiyu Oboh, Sunday Idowu Oyeleye, Opeyemi Ogunsuyi
Recently, combination therapy involving cholinesterase (ChE) inhibitor with other neuroprotective agents has shown better desirable effect in the management/prevention of dementia but limited information is available on their effect with dietary polyphenols. Hence, this study sought to assess the combined pretreatment effect of curcumin, the major polyphenolic compound of turmeric (Curcuma longa) rhizomes, with donepezil, a cholinesterase inhibitor, on cognitive function in scopolamine-induced memory impairment in rats...
January 19, 2017: Neurotoxicity Research
Zhihua Qi, Huiqin Zhang, Chuhua Fu, Xiao Liu, Bo Chen, Yanwei Dang, Huayun Chen, Lijun Liu
Prolonged hydrocephalus is a major cause of severe disability and death of intraventricular hemorrhage (IVH) patients. However, the therapeutic options to minimize the detrimental effects of post-hemorrhagic hydrocephalus are limited. Curcumin has been reported to confer neuroprotective effects in numerous neurological diseases and injuries, but its role in IVH-induced hydrocephalus has not been determined. The aim of present study was to determine whether curcumin treatment ameliorates blood brain barrier (BBB) damage and reduces the incidence of post-hemorrhagic hydrocephalus in IVH rat model...
January 10, 2017: Neuroscience Letters
Zun-Jing Liu, Zhong-Hao Li, Lei Liu, Wen-Xiong Tang, Yu Wang, Ming-Rui Dong, Cheng Xiao
Neuroinflammation is known to have a pivotal role in the pathogenesis of Alzheimer's disease (AD), and curcumin has been reported to have therapeutical effects on AD because of its anti-inflammatory effects. Curcumin is not only a potent PPARγ agonist, but also has neuroprotective effects on cerebral ischemic injury. However, whether PPARγ activated by curcumin is responsible for the anti-neuroinflammation and neuroprotection on AD remains unclear, and needs to be further investigated. Here, using both APP/PS1 transgenic mice and beta-amyloid-induced neuroinflammation in mixed neuronal/glial cultures, we showed that curcumin significantly alleviated spatial memory deficits in APP/PS1 mice and promoted cholinergic neuronal function in vivo and in vitro...
2016: Frontiers in Pharmacology
Dong Wook Lim, Hyun Jung Son, Min Young Um, In-Ho Kim, Daeseok Han, Suengmok Cho, Chang-Ho Lee
In the present study, we examined the ameliorating effects of demethoxycurcumin (DMC) on memory impairment induced by scopolamine using passive avoidance and Morris water maze tests in mice. Moreover, to determine the neurobiological effects underlying the ameliorating effects of the DMC, choline acetyltransferase (ChAT) immunoreactivity was evaluated in mice exposed to scopolamine. Our results demonstrated that chronic oral administration (28 days) of DMC (10 mg/kg) improved scopolamine-induced learning impairment in the passive avoidance task and memory impairment in the Morris water maze...
August 5, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Ayodele Jacob Akinyemi, Princess Kamsy Okonkwo, Opeyemi Ayodeji Faboya, Sunday Amos Onikanni, Adewale Fadaka, Israel Olayide, Elizabeth Olufisayo Akinyemi, Ganiyu Oboh
Curcumin, the main polyphenolic component of turmeric (Curcuma longa) rhizomes has been reported to exert cognitive enhancing potential with limited scientific basis. Hence, this study sought to evaluate the effect of curcumin on cerebral cortex acetylcholinesterase (AChE) and adenosine deaminase (ADA) activities in cadmium (Cd)-induced memory impairment in rats. Animals were divided into six groups (n = 6): saline/vehicle, saline/curcumin 12.5 mg/kg, saline/curcumin 25 mg/kg, Cd/vehicle, Cd/curcumin 12...
August 5, 2016: Metabolic Brain Disease
Hui-Li Feng, Hui-Zi Dang, Hui Fan, Xiao-Pei Chen, Ying-Xue Rao, Ying Ren, Jin-Duo Yang, Jing Shi, Peng-Wen Wang, Jin-Zhou Tian
Deficits in glucose, impaired insulin signalling and brain insulin resistance are common in the pathogenesis of Alzheimer's disease (AD); therefore, some scholars even called AD type 3 diabetes mellitus. Curcumin can reduce the amyloid pathology in AD. Moreover, it is a well-known fact that curcumin has anti-oxidant and anti-inflammatory properties. However, whether or not curcumin could regulate the insulin signal transduction pathway in AD remains unclear. In this study, we used APPswe/PS1dE9 double transgenic mice as the AD model to investigate the mechanisms and the effects of curcumin on AD...
December 2016: International Journal of Immunopathology and Pharmacology
Teresa A Barber, Edward M Edris, Paul J Levinsky, Justin M Williams, Ari R Brouwer, Shawn A Gessay
In the one-trial taste-avoidance task in day-old chicks, acetylcholine receptor activation has been shown to be important for memory formation. Injection of scopolamine produces amnesia, which appears to be very similar in type to that of Alzheimer's disease, which is correlated with low levels of acetylcholine in the brain. Traditional pharmacological treatments of Alzheimer's disease, such as cholinesterase inhibitors and glutamate receptor blockers, improve memory and delay the onset of impairments in memory compared with placebo controls...
September 2016: Behavioural Pharmacology
Sajad Shahbazi, Tammanna R Sahrawat, Monalisa Ray, Swagatika Dash, Dattatreya Kar, Shikha Singh
Cyclooxygenase-2 (COX-2) plays an important role in memory consolidation and synaptic activity, the most fundamental functions of the brain. It converts arachidonic acid to prostaglandin endoperoxide H2. In contrast, if over-expressed, it causes inflammation in response to cytokine, pro-inflammatory molecule, and growth factor. Anti-inflammatory agents, by allosteric or competitive inhibition of COX-2, alleviate the symptoms of inflammation. Coxib family drugs, particularly celecoxib, are the most famous anti-inflammatory agents available in the market showing significant inhibitory effect on COX-2 activity...
2016: PloS One
Tomohiro Umeda, Kenjiro Ono, Ayumi Sakai, Minato Yamashita, Mineyuki Mizuguchi, William L Klein, Masahito Yamada, Hiroshi Mori, Takami Tomiyama
Amyloid-β, tau, and α-synuclein, or more specifically their soluble oligomers, are the aetiologic molecules in Alzheimer's disease, tauopathies, and α-synucleinopathies, respectively. These proteins have been shown to interact to accelerate each other's pathology. Clinical studies of amyloid-β-targeting therapies in Alzheimer's disease have revealed that the treatments after disease onset have little benefit on patient cognition. These findings prompted us to explore a preventive medicine which is orally available, has few adverse effects, and is effective at reducing neurotoxic oligomers with a broad spectrum...
May 2016: Brain: a Journal of Neurology
Yingkun He, Pengwen Wang, Peng Wei, Huili Feng, Ying Ren, Jinduo Yang, Yingxue Rao, Jing Shi, Jinzhou Tian
Significant losses of synapses have been demonstrated in studies of Alzheimer's disease (AD), but structural and functional changes in synapses that depend on alterations of the postsynaptic density (PSD) area occur prior to synaptic loss and play a crucial role in the pathology of AD. Evidence suggests that curcumin can ameliorate the learning and memory deficits of AD. To investigate the effects of curcumin on synapses, APPswe/PS1dE9 double transgenic mice (an AD model) were used, and the ultra-structures of synapses and synapse-associated proteins were observed...
June 2016: International Journal of Immunopathology and Pharmacology
Zhenwei Qiu, Shuangzhu Yue
OBJECTIVE: To investigate the effect of curcumin on learning and memory function of rats with subarachnoid hemorrhage (SAH) and the possible mechanism. METHODS: A total of 30 male Sprague-Dawley rats were randomly divided into three groups: Sham group, SAH group and curcumin (Cur) therapy group. Experimental SAH rat models were established by injecting autologous blood into the cisterna magna. Neurological deficits of rats were examined at different time points...
March 2016: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
Shilei Song, Qingmei Nie, Zhifang Li, Gang Du
Our previous study has demonstrated that curcumin (CM), a natural ingredient isolated from Zingiberaceae, exerts the effect of inhibiting hippocampal injury in 6-hydroxydopamine (6-OHDA)-induced parkinsonian rat. However, the potential effect of CM on 6-OHDA-injured substantia nigra (SN) needs to be investigated. This study aimed to further evaluate the therapeutic effectiveness of CM against damaged SN in rats. Methodologically, Parkinson's disease (PD) rat was prepared by using a surgical approach of injecting 6-hydroxydopamine (6-OHDA) into the SN...
April 2016: Pathology, Research and Practice
Kunmu Zheng, Xiaoman Dai, Nai'an Xiao, Xilin Wu, Zhen Wei, Wenting Fang, Yuangui Zhu, Jing Zhang, Xiaochun Chen
Alzheimer's disease (AD) is the most common dementia and the trigger of its pathological cascade is widely believed to be the overproduction and accumulation of β-amyloid protein (Aβ) in the affected brain. However, effective AD remedies are still anxiously awaited. Recent evidence suggests that curcumin may be a potential agent for AD treatment. In this study, we used 5×FAD transgenic mice as an AD model to investigate the effects of curcumin on AD. Our results showed that curcumin administration (150 or 300 mg/kg/day, intragastrically, for 60 days) dramatically reduced Aβ production by downregulating BACE1 expression, preventing synaptic degradation, and improving spatial learning and memory impairment of 5×FAD mice...
April 2017: Molecular Neurobiology
Carmela Spagnuolo, Marianna Napolitano, Idolo Tedesco, Stefania Moccia, Alfonsina Milito, Gian Luigi Russo
Neurodegenerative diseases cause a progressive functional alteration of neuronal systems, resulting in a state of dementia which is considered one of the most common psychiatric disorders of the elderly. Dementia implies an irreversible impairment of intellect that increases with age causing alteration of memory, language and behavioral problems. The most common form, which occurs in more than half of all cases, is Alzheimer's disease, characterized by accumulation of amyloid plaques and neurofibrillary tangles...
2016: Current Topics in Medicinal Chemistry
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