Curcumin counteracts the aluminum-induced ageing-related alterations in oxidative stress, Na+K+-ATPase and protein kinase C in adult and old rat brain regions. Biogerontology
School of Life Sciences, Jawaharlal Nehru University, New Delhi, India.Biogerontology (Impact Factor: 3.29). 12/2008; 10(4):489-502. DOI: 10.1007/s10522-008-9195-x
This study investigated the effect of curcumin on aluminium-induced alterations in ageing-related parameters: lipid peroxidation, superoxide dismutase (SOD), glutathione peroxidase (GPx), glutathione-s-transferase (GST), protein kinase C (PKC), Na(+), K(+)-adenosine triphosphatase (Na(+), K(+)-ATPase) and acetylcholinesterase (AChE) in the cerebral cortex and hippocampus of the brain of 10- and 24-month-old rats. Measurements taken from aluminium-fed rats were compared with those from rats in which curcumin and aluminium were co-administered. In aluminium-treated rats the levels of lipid peroxidation, PKC and AChE were enhanced while the activities of SOD, GPx, GST and Na(+), K(+)-ATPase were significantly decreased in both the brain regions of both age-groups. In animals co-administered with curcumin and aluminium, the levels of lipid peroxidation, activities of PKC and AChE were significantly lowered while the activities of SOD, GPx, GST and Na(+), K(+)-ATPase were significantly enhanced in the two brain regions studied indicating curcumin's protective effects against aluminium toxicity. Though the magnitudes of curcumin-induced alterations varied in young and old animals, the results of the present study also demonstrated that curcumin exerts a protective effect against aluminium-induced elevation of ageing-related changes by modulating the extent of oxidative stress (by upregulating the activities of antioxidant enzymes) and by regulating the activities of Na(+), K(+) ATPase, PKC and AChE. Therefore, it is suggested that curcumin counters aluminium-induced enhancement in ageing-related processes.
[Show abstract] [Hide abstract]
- "Al is a commonly studied neurotoxin that affects the nervous system , including various regions of the brain (Nehru & Bhalla 2006). Some experts believe that Al crosses the blood–brain barrier and plays a role in the formation of Alzheimer-like neurofibrillary tangles (Sharma et al. 2009). Al +3 and other metals influence the oligomerization and conformational changes of the b-amyloid protein as a cross-linker in the 'amyloid cascade hypothesis', and therefore, their implications are important in this context. "
ABSTRACT: Aluminium (Al) toxicity is closely linked to the pathogenesis of Alzheimer's disease (AD). This experimental study investigated the neuroprotective effect of melatonin (Mel; 10 mg/kg bwt) on aluminium chloride (AlCl3 ; 34 mg/kg bwt) induced neurotoxicity and oxidative stress in rats. Adult male albino Wistar rats were injected with AlCl3 for 7 days. The effect on brain structure, lipid peroxidation (LPO), nitric oxide (NO) levels, glutathione (GSH) content, antioxidant enzymes (SOD, CAT, GPx and GR), apoptotic proteins (Bax and Bcl-2) and an apoptotic enzyme (caspase-3) was investigated. No apparent changes occurred following the injection of melatonin. Melatonin pretreatment of the AlCl3 -administered rats reduced brain damage, and the tissues appeared like those of the control rats. Compared to treatment with AlCl3 , pretreatment with melatonin decreased LPO and NO levels and increased the GSH content and antioxidant enzyme activity. Moreover, melatonin increased the levels of the anti-apoptotic protein, Bcl-2, decreased the levels of the pro-apoptotic protein, Bax, and inhibited caspase-3 activity. Therefore, our results indicate that melatonin may provide therapeutic value against aluminium-induced oxidative stress and histopathological alternations in the rat brain and that these effects may be related to anti-apoptotic and antioxidant activities. © 2015 The Authors. International Journal of Experimental Pathology © 2015 International Journal of Experimental Pathology.International Journal of Experimental Pathology 04/2015; 96(3). DOI:10.1111/iep.12122 · 2.17 Impact Factor
[Show abstract] [Hide abstract]
- "Curcumin confers protection via antioxidant, anti-inflammatory (Huang et al., 1991), anti-microbial, anti-parasitic, anti-mutagen and anticancer properties (Conney et al., 1991). Antioxidant properties of curcumin are related to its powerful scavenging of superoxide anion, hydroxyl radical and nitric oxide (Sharma et al., 2008). The purpose of this study is to examine mechanism(s) of neurotoxicity as well as haematological changes induced by long term of Al treatment. "
ABSTRACT: Aluminium (Al) is a ubiquitous element introduced into the environment and is implicated in the pathogenesis of several neurological disorders associated with cognitive impairment. Free radical-mediated cytotoxicity is involved in Al detrimental effects, where the brain is a core target of Al toxicity being more vulnerable to oxidative damage as a result of its high lipid content. This work aims to evaluate the potential role of curcumin in modulating the neurobehavioral toxic action(s) induced experimentally by Al in rats, using ascorbic acid as reference treatment. Male adult Sprague Dawley rats were divided into seven groups; two control groups, administered distilled water and 9% ethanol. The other group were AlCl ³ (4.2mg/kg, i.p), ascorbic acid (85mg/kg, p.o) or curcumin (100 mg/kg, p.o) treated groups. In addition, ascorbic acid or curcumin was administered combined with Al in the last two groups. The different regimens were administered for 28 consecutive days. Rats were subjected to behavioral tests, namely open field and conditioned avoidance, then brain Al content as well as brain neurotransmitters contents [serotonin, norepinephrine and dopamine] were estimated. Markers of oxidative stress [brain reduced glutathione and malondialdehyde]; lactate dehydrogenase and acetylcholine esterase were also measured in the whole brain homogenate. In addition, haematological tests were performed by evaluating red blood cells count, haemoglobin concentration, and haematocrit %. In the open field, the latency time was increased in Al treated rats while the ambulation frequency, rearing and grooming were decreased. This inhibition in motor activity was accompanied by a decline in learning and memory performance in conditioned avoidance. Brain Al content increased while their content of 5-HT, NE and DA were suppressed. Lactate dehydrogenase activity and malondialdehyde content were elevated, while acetylcholine esterase activity and reduced glutathione concentration were reduced. Concomitant administration of curcumin restored all parameters measured, an effect that was comparable to ascorbic acid. In conclusion, curcumin may confer protection against Al induced neurobehavioral toxic effects through its decreased brain Al content, antioxidant action as well as restoration of neurotransmitter content, as evident by decreased LDH activity and obvious improvements of neurobehavioural tests.
- "Curcumin (diferuloylmethane), a yellow extract from the plant Curcuma longa (turmeric, a popular Indian spice), is a main bioactive polyphenol, which has been used widely as a spice, food additive , and as a herbal medicine in Asia . A large number of studies have demonstrated that curcumin possesses diverse physiological functions that combat inflammation, diabetes, spasticity, allergy, rheumatism, and cancer   . Furthermore , curcumin has antioxidant properties, which may act directly as a chemical oxidant or indirectly as a modulator of cellular defenses . "
Article: Curcumin and aging[Show abstract] [Hide abstract]
ABSTRACT: Turmeric has been used commonly as a spice, food additive, and an herbal medicine worldwide. Known as a bioactive polyphenolic extract of Turmeric, curcumin has a broad range of health benefit properties for humans. Recently, active research on curcumin with respect to aging and related traits in model organisms has demonstrated that curcumin and its metabolite, tetrahydrocurcumin (THC), increase mean lifespan of at least three model organisms: nematode roundworm, fruit fly Drosophila, and mouse. Nematodes grown on media containing curcumin showed a significantly increased lifespan by reducing the production of reactive oxygen species. Genes osr-1, sek-1, mek-1, skn-1, unc-43, sir-2.1, and age-1 are required for curcumin-mediated lifespan extension. The lifespan extension of Drosophila by curcumin supplementation was associated with increased superoxide dismutase (SOD) activity, and decreased lipofuscin and malondialdehyde levels. Curcumin up-regulated expression of SOD genes and down-regulated expression of several age-related genes, such as dInR, ATTD, Def, CecB, and DptB. In addition, THC extended lifespan in Drosophila and inhibited the oxidative stress response by regulating FOXO and Sir2. Mice fed diets containing THC starting at the age of 13 months had significantly increased mean lifespan. In summary, the positive effects of curcumin on lifespan extension likely arise from beneficial regulation of common oxidative stress responses and age-related genes. Understanding the molecular mechanism(s) of curcumin action has provided base knowledge and rationale for future human clinical trials, and for nutritional intervention in aging and age-associated disorders in humans. © 2013 BioFactors, 2013.BioFactors 02/2013; 39(1). DOI:10.1002/biof.1086 · 4.59 Impact Factor
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.