Impact of cocos nucifera l. on memory and oxidative stress in Swiss mice

Abstrakt

Background: Coconut water (CW) is a sweet tasting refreshing drink obtained directly
from the cavity (inner part) of coconut fruits. It is one the world’s most versatile natural
product with increasing evidence that supports its role in health and medicinal
applications such as prevention of neuronal degeneration in people who are prone to
developing Alzheimer’s disease. This study aimed at investigating the effects of coconut
water on spatial learning and memory via behavioral and biochemical assessments using
mice.
Materials and methods: The experiment was performed in three phases viz. 7, 14 and 28
days. Animals were divided into six groups, where Group 1 received distilled water,
Group 2 received Lipopolysaccharide (LPS) at 250 µg/kg body weight, while Group 3-6
received CW at 0.02, 0.05, 0.1, and 0.2 ml/20 g body weight respectively. The cognitive
effect of CW was assessed using the Morris Water Maze model. Also, the levels of
Malondialdehyde (MDA), glutathione (GSH) and nitric oxide (NO) were estimated by
spectrophotometric method.
Results: In the cognitive assessment, the groups treated with CW for 7 days showed a
significant reduction in latency time when compared with control and LPS
groups. Malondialdehyde and NO levels were also significantly reduced in groups treated
with CW for 7 days when compared with the LPS and control groups (p<0.05). However,
there was a significant increase in GSH levels (p<0.05).

Conclusion: This study showed that Coconut Water may improve memory and reduce
oxidative stress in laboratory mice.

Keywords: Coconut water; Lipopolysaccharide; Morris water maze; Memory; Oxidative
markers.

Résumé

Contexte: L’eau de coco (EC) est une boisson rafraîchissante au goût sucré obtenue directement de la
cavité (partie intérieure) des fruits de noix de coco. Il s’agit de l’un des produits naturels les plus
polyvalents au monde, avec de plus en plus de preuves confirmant son rôle dans la santé et les
applications médicinales telles que la prévention de la dégénérescence neuronale chez les personnes
sujettes au développement de la maladie d’Alzheimer. Cette étude visait à étudier les effets de l’eau de
coco sur l’apprentissage spatial et la mémoire via des évaluations comportementales et biochimiques à
l’aide de souris.
Matériaux et méthodes : L’expérience a été réalisée en trois phases, à savoir 7, 14 et 28 jours. Les
animaux ont été divisés en six groupes, où le groupe 1 a reçu de l’eau distillée, le groupe 2 a reçu la
lipopolysaccharide (LPS) à 250 µg / kg de poids corporel, tandis que le groupe 3-6 a reçu l’EC à 0,02,
0,05, 0,1 et 0,2 ml / 20 g de poids corporel respectivement. L’effet cognitif de l’EC a été évalué à l’aide
du modèle de Labyrinthe d’Eau de Morris. De plus, les niveaux de malondialdéhyde (MDA), de
glutathion (GSH) et d’oxyde nitrique (ON) ont été estimés par méthode spectrophotométrique.
Résultats: Dans l’évaluation cognitive, les groupes traités par EC pendant 7 jours ont montré une
réduction significative du temps de latence par rapport aux groupes témoins et LPS. Les niveaux
de malondialdéhyde et d’ON ont également été significativement réduits dans les groupes traités par EC
pendant 7 jours par rapport au LPS et aux groupes témoins (p <0,05). Cependant, il y avait une
augmentation significative des niveaux de GSH (p <0,05).

Conclusion: Cette étude a montré que l’EC peut améliorer la mémoire et réduire le stress oxydatif chez
les souris de laboratoire.
Mots - clés : eau de coco; Lipopolysaccharide; Le labyrinthe d’eau de Morris; Mémoire; Marqueurs
oxydatifs.
Correspondence: Dr. S.A. Onasanwo, Department of Physiology, Neurosciences and Oral Physiology Unit, College of Medicine, University of Ibadan, Ibadan, Nigeria. Email:samphil2002@yahoo.com;
sa.onasanwo@gmail.ui.edu.ng

pdf (angielski)

Bibliografia

Haddadi M, Jahromi SR, Sagar BKC, et al. Brain aging, memory impairment and oxidative stress: A study in Drosophila melanogaster. Behav Brain Res. 2014; 259: 60 – 69.

Praticò D. Evidence of oxidative stress in Alzheimer’s disease brain and antioxidant therapy. Ann NY AcadSci 2008; 1147:70 - 78.

Fukui K, Onodera K, Shinkai T, Suzuki S and Urano S. Impairment of Learning and Memory in Rats Caused by Oxidative Stress and Aging, and Changes in Antioxidative Defense Systems. Ann. N.Y. Acad. Sci. 2001; 928:1.168 - 175. https://doi.org/10.1111/j.1749-6632.2001.tb05646.x.

Stadtman E. Free radicals in the genesis of Alzheimer’s disease. Ann. N.Y. Acad. Sci. 1992; 695: 73 - 76.

Bourdeix R, Guarino L and Baudouin L. Collecting: status, gaps and strategy. In: Batugal P, Rao VR, and Oliver J (eds). Coconut geneti resources. BioversityInternatinal, Serdang, Malaysia. 2005.

Pieris WVD. Coconut water, the liquid component of the coconut endosperm: a note on terminology. Oleagineux 1971; 26: 383-390.

Ediriweera ERHSS. Medicinal uses of coconut (Cocos nucifera L.), Cocoinfo Int. 2003; 10: 11 – 21.

Reddy EP and Lakshmi TM. Coconut Water - Properties, Uses, Nutritional Benefits in Health and Wealth and in Health and Disease: A Review. Journal of Current trends in Clinical Medicine & laboratory biochemistry. 2004; 2(2): 6 – 18.

Campbell-flack D, Thomas J, FalekTM, Tutuo N and Clem K. The intravenous use of coconut water. Am. J. Emerg. Med. 2000; 18: 108 - 111.

Rattan SIS and Sodagam L. Gerontomodulatory and youth-preserving effects of zeatin on human skin fibroblasts undergoing aging in vitro. Rejuvenation Res. 2005; 8: 46–57

Morris R. Developments of a water-maze procedure for studying spatial learning in the rat. J. Neurosci. Meth. 1984; 11:47-60.

Gornall AG, Bardawill CJ and David MM. Determination of serum proteins by means of the biuret reaction. J biol chem. 1949;177(2):751- 766.

Varshney R and Kale RK. Effect of calmodulin antagonist on radiation-induced lipid peroxidation in microsomes. Int J Rad Biol 1990; 58:733 -743.

Sedlak J and Lindsay RH. Estimation of total, protein-bound, and nonprotein sulfhydryl groups in tissue with Ellman’s reagent. Anal Biochem 1968; 25(1):192 – 205.

Ebrahimzadeh MA, Mahmoudi M, Ahangar N, et al. Antidepressant Activity of Corn Silk Pharmacologyonline 2009; 3: 647-652.

Shenkin A. The key role of micronutrients. Clinical Nutr. 2006; 25: 1 -13.

Anurag P and RajamohanT. Cardioprotective effect of tender coconut water in experimental myocardial infarction. Plant Foods. Hum. Nutr., 2003; 58: 1 - 12.

Radenahmed N, Saleh F, Sawangjaroen K, et al. Young coconut juice significantly reduces histopathological changes in the brain that is induced by hormonal imbalance a possible implication to postmenopausal women, Histol. Histopathol. 2009; 24: 667-674.

Shaw KN, Commins ST and O’mara SM. Cyclooxygenase inhibition attenuates endotoxin-induced spatial learning deficits, but not an endotoxin-induced blockade of long-term potentiation. Brain Res. 2005; 1038: 231-237.

Hennigan A, Trotter C and Kelly AM. Lipopolysaccharide impairs long-term potentiation and recognition memory and increases p75NTR expression in the rat dentate gyrus. Brain Res. 2007; 1130: 158-166.

Zhu B, Wang ZG, Ding J,et al.Chronic lipopolysaccharide exposure induces cognitive dysfunction without affecting BDNF expression in the rat hippocampus. ExpTher Med. 2014; 7: 750-754.

Morris RGM. Spatial localization does not require the presence of local cues. Learn. Motiv. 1981; 12:239-260.

Beevi SS, MangamooriLN and Reddy LV. Protective effect of Raphanussativus on H2O2 induced oxidative damage in human lymphocytes. World Journal of Microbiology and Biotechnology 2010; 26(8):1519-1525 DOI: 10.1007/s11274-010-0328-4

Sharma AK, Kumar S and Pandey AK. Ferric Reducing, Anti-radical and Cytotoxic Activities of Tinosporacordifolia Stem Extracts. Biochem A

Calabrese nalBiochem 2014; 3: 153. doi:10.4172/2161-1009.1000153

Calabrese V, Butterfield DA and Stella AM. Nutritional antioxidants and the hemeoxygenase pathway of stress tolerance: novel targets for neuroprotection in Alzheimer’s disease. Ital J Biochem 2003; 52:177 - 181.

Yabuki Y and Fukunaga K. Oral administration of glutathione improves memory deficits following transient brain ischemia by reducing brain oxidative stress. Neuroscience. 2013; 10 (250):394-407. doi: 10.1016/j.neuroscience.2013.07.017.

Ferihan C, Sibel D, Ramazan AY and Sevin G. Systemic taurine prevents brain from lipopolysaccharide-induced lipid peroxidation in rats. African Journal of Pharmacy and Pharmacology 2012; 6(15): 1099 - 1105.

Garthwaite J and Boulton CL. Nitric oxide signaling in the central nervous system. Annu. Rev. Physiol. 1995; 57:683 - 706.

dos Reis EA, de Oliveira LS, Lamers ML, Netto CB and Wyse AY. L-arginine administration inhibits hippocampal NA (+)-ATPase activity and impairs retention of an inhibitor avoidance task in rats. Brain Res. 2003; 951:151 - 157