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de la Peña I, Afable T, Dahilig-Talan VR, Cruz P. Review of Plant Extracts and Active Components: Mechanisms of Action for the Treatment of Obesity-Induced Cognitive Impairment. Brain Sci 2023; 13:929. [PMID: 37371407 DOI: 10.3390/brainsci13060929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 06/05/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
Obesity has been shown to negatively impact cognitive functions, but effective treatments for obesity-induced cognitive impairment are lacking. Natural dietary and plant products, functional foods, and plant-derived compounds have gained attention as potential remedies in part due to the nootropic properties of plants and certain plant-derived agents. This review discusses plant extracts and plant-derived substances that have been shown to ameliorate obesity-induced cognitive impairment in animal models. Mechanistic evaluations of their therapeutic effects are also summarized. A literature search was conducted using PubMed and Google Scholar databases, resulting in the review of 27 English language articles meeting the inclusion criteria. The nine plants (e.g., Ashwagandha, Adzuki bean, and olive) and 18 plant-derived substances (e.g., curcumin, Huperzine A, and Roxburgh's jewel orchid polysaccharides) included in this review improved obesity-induced cognitive impairment through several mechanisms, including attenuation of neuroinflammation, improvement in both central and peripheral insulin resistance, enhancement of neuroprotection and neurogenesis, and modulation of the synthesis and release of cognition-associated neurotransmitters. Based on these findings, plants and plant-derived substances may hold promise for the prevention and treatment of obesity-induced cognitive impairment. Further research is warranted to explore the clinical potential of these plant-derived treatments and to elucidate their underlying molecular mechanisms.
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Affiliation(s)
- Ike de la Peña
- Department of Pharmaceutical and Administrative Sciences, School of Pharmacy, Loma Linda University, Loma Linda, CA 92350, USA
| | - Timothy Afable
- Department of Pharmaceutical and Administrative Sciences, School of Pharmacy, Loma Linda University, Loma Linda, CA 92350, USA
| | | | - Philip Cruz
- Herbanext Laboratories, Inc., Negros South Road, Bago City 6101, Philippines
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Naomi R, Teoh SH, Embong H, Balan SS, Othman F, Bahari H, Yazid MD. The Role of Oxidative Stress and Inflammation in Obesity and Its Impact on Cognitive Impairments-A Narrative Review. Antioxidants (Basel) 2023; 12:antiox12051071. [PMID: 37237937 DOI: 10.3390/antiox12051071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/26/2023] [Accepted: 04/28/2023] [Indexed: 05/28/2023] Open
Abstract
Obesity is a chronic low-grade inflammatory condition that induces the generation of oxidative stress and inflammation. This oxidative stress and inflammation stimulate brain atrophy and some morphological changes in the brain that eventually result in cognitive impairments. However, there is no exact study that has summarized the role of oxidative stress and inflammation in obesity and its impact on cognitive impairments. Thus, the objective of this review is to recapitulate the current role of oxidative stress and inflammation in cognitive decline based on in vivo evidence. A comprehensive search was performed in Nature, Medline and Ovid, ScienceDirect, and PubMed, and the search was limited to the past 10 years of publication. From the search, we identified 27 articles to be further reviewed. The outcome of this study indicates that a greater amount of fat stored in individual adipocytes in obesity induces the formation of reactive oxygen species and inflammation. This will lead to the generation of oxidative stress, which may cause morphological changes in the brain, suppress the endogenous antioxidant system, and promote neuroinflammation and, eventually, neuronal apoptosis. This will impair the normal function of the brain and specific regions that are involved in learning, as well as memory. This shows that obesity has a strong positive correlation with cognitive impairments. Hence, this review summarizes the mechanism of oxidative stress and inflammation that induce memory loss based on animal model evidence. In conclusion, this review may serve as an insight into therapeutic development focusing on oxidative stress and inflammatory pathways to manage an obesity-induced cognitive decline in the future.
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Affiliation(s)
- Ruth Naomi
- Department of Human Anatomy, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang 43400, Malaysia
| | - Soo Huat Teoh
- Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas 13200, Malaysia
| | - Hashim Embong
- Department of Emergency Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
| | - Santhra Segaran Balan
- Department of Diagnostic and Allied Health Sciences, Faculty of Health and Life Sciences, Management and Science University, Shah Alam 40100, Malaysia
| | - Fezah Othman
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang 43400, Malaysia
| | - Hasnah Bahari
- Department of Human Anatomy, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang 43400, Malaysia
| | - Muhammad Dain Yazid
- Centre for Tissue Engineering and Regenerative Medicine (CTERM), Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
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Lan Y, Ma Z, Chang L, Peng J, Zhang M, Sun Q, Qiao R, Hou X, Ding X, Zhang Q, Peng Q, Dong J, Liu X. Sea buckthorn polysaccharide ameliorates high-fat diet induced mice neuroinflammation and synaptic dysfunction via regulating gut dysbiosis. Int J Biol Macromol 2023; 236:123797. [PMID: 36828095 DOI: 10.1016/j.ijbiomac.2023.123797] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 02/04/2023] [Accepted: 02/18/2023] [Indexed: 02/24/2023]
Abstract
Currently, definitive treatment for neurodegenerative diseases without side effects has not been developed, therefore, exploring natural polysaccharides with neuroprotection to prevent the occurrences and progressions of cognitive dysfunctions has important significance. The purpose of this study was to investigate the effects of sea buckthorn polysaccharide (SBP) on high-fat diet (HFD) induced mice cognitive dysfunctions and attempted to explore its biological mechanisms. Behavior tests (Y-maze and Barnes maze) suggested that SBP effectively alleviated the HFD induced behavioral disorders, which was in accordance with the inhibition of neuroinflammation via suppressing the NF-κB pathway and amelioration of synaptic dysfunction via upregulating CREB/BDNF/TrkB pathway in mice brain. Furthermore, SBP alleviated the gut barrier impairment, inflammatory responses, and lipopolysaccharide invasion into blood circulation via regulating the gut microbiome structure, especially correcting the reduction of Ileibacterium and increase of Lactobacillus, Dubosiella, Olsenella, Helicobacter, and Ruminiclostridium_9 in HFD mice. Therefore, the reversal effects of SBP on gut dysbiosis might be the important reason for its positive effects on cognitive dysfunction induced by HFD in mice.
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Affiliation(s)
- Ying Lan
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Zhiyuan Ma
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China; College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Lili Chang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Jing Peng
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Mengqi Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Qingyang Sun
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Ruixue Qiao
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Xinglin Hou
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Xuechao Ding
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Qiang Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Qiang Peng
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China; Puredia Limited, Xining, China
| | - Juane Dong
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China; College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China.
| | - Xuebo Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China.
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Aging-related changes in metabolic indicators in female rats and their management with Tinospora cordifolia. Biogerontology 2022; 23:363-380. [PMID: 35488997 DOI: 10.1007/s10522-022-09962-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 04/12/2022] [Indexed: 12/24/2022]
Abstract
Conflicting reports of HRT necessitates exploration of therapeutic interventions with the least side effects to preserve metabolic homeodynamics in women later in life. The current study was designed to elucidate the cumulative effects of aging and/or high fat diet (HFD) on some metabolic indicators and their management by Tinospora cordifolia stem powder (TCP) using middle-aged acyclic and young adult cyclic female rats as the model system. Animals were fed on either normal chow or HFD supplemented with or without TCP. Blood and liver tissue were collected for biochemical, and histological studies as well as for expression of proteins regulating lipid metabolism. Animals fed with TCP supplemented normal chow feed showed bodyweight management over 12-weeks despite their high feed and calories intake compared to young and age-matched controls as well as HFD-fed animals. TCP dose used was not toxic and rather prevented age-associated liver dysfunctions and ameliorated dyslipidemia and oxidative stress, normalized blood glucose, insulin, leptin, and secretary pro-inflammatory cytokines. Further, bodyweight management effect of TCP was observed to target AMPK signalling pathway as the mediator of lipogenesis, sterol biosynthesis, lipolysis, and β-oxidation of fatty acids. These findings suggest that TCP supplementation in diet may be a potential interventional strategy to ameliorate aging-associated hepatic and metabolic dysfunctions and to promote healthy aging.
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Liu I, Varinthra P, Suresh P, Chokkalingam P, Ibiayo A. Anti-inflammatory and memory-enhancing properties of Chinese herbal extracts: The possible application in Alzheimer's disease. Tzu Chi Med J 2022. [DOI: 10.4103/tcmj.tcmj_139_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Quercetin exhibits potent antioxidant activity, restores motor and non-motor deficits induced by rotenone toxicity. PLoS One 2021; 16:e0258928. [PMID: 34767546 PMCID: PMC8589152 DOI: 10.1371/journal.pone.0258928] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 10/10/2021] [Indexed: 02/06/2023] Open
Abstract
The rotenone-induced animal model of Parkinson's disease (PD) has been used to investigate the pathogenesis of PD. Oxidative stress is one of the main contributors of neurodegeneration in PD. Flavonoids have the potential to modulate neuronal function and combat various neurodegenerative diseases. The pre- and post-supplementation of quercetin (50 mg/kg, p.o) was done in rats injected with rotenone (1.5 mg/kg, s.c). After the treatment, behavioral activities were monitored for motor activity, depression-like behavior, and cognitive changes. Rats were decapitated after behavioral analysis and the brain samples were dissected out for neurochemical and biochemical estimation. Results showed that supplementation of quercetin significantly (p<0.01) restored rotenone-induced motor and non-motor deficits (depression and cognitive impairments), enhanced antioxidant enzyme activities (p<0.01), and attenuated neurotransmitter alterations (p<0.01). It is suggested that quercetin supplementation improves neurotransmitter levels by mitigating oxidative stress via increasing antioxidant enzyme activity and hence improves motor activity, cognitive functions, and reduces depressive behavior. The results of the present study showed that quercetin pre-supplementation produced more significant results as compared to post-supplementation. These findings show that quercetin can be a potential therapeutic agent to reduce the risk and progression of PD.
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Paul S, Chakraborty S, Anand U, Dey S, Nandy S, Ghorai M, Saha SC, Patil MT, Kandimalla R, Proćków J, Dey A. Withania somnifera (L.) Dunal (Ashwagandha): A comprehensive review on ethnopharmacology, pharmacotherapeutics, biomedicinal and toxicological aspects. Biomed Pharmacother 2021; 143:112175. [PMID: 34649336 DOI: 10.1016/j.biopha.2021.112175] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 09/03/2021] [Accepted: 09/07/2021] [Indexed: 12/24/2022] Open
Abstract
Withania somnifera (L.) Dunal (Solanaceae) has been used as a traditional Rasayana herb for a long time. Traditional uses of this plant indicate its ameliorative properties against a plethora of human medical conditions, viz. hypertension, stress, diabetes, asthma, cancer etc. This review presents a comprehensive summary of the geographical distribution, traditional use, phytochemistry, and pharmacological activities of W. somnifera and its active constituents. In addition, it presents a detailed account of its presence as an active constituent in many commercial preparations with curative properties and health benefits. Clinical studies and toxicological considerations of its extracts and constituents are also elucidated. Comparative analysis of relevant in-vitro, in-vivo, and clinical investigations indicated potent bioactivity of W. somnifera extracts and phytochemicals as anti-cancer, anti-inflammatory, apoptotic, immunomodulatory, antimicrobial, anti-diabetic, hepatoprotective, hypoglycaemic, hypolipidemic, cardio-protective and spermatogenic agents. W. somnifera was found to be especially active against many neurological and psychological conditions like Parkinson's disease, Alzheimer's disease, Huntington's disease, ischemic stroke, sleep deprivation, amyotrophic lateral sclerosis, attention deficit hyperactivity disorder, bipolar disorder, anxiety, depression, schizophrenia and obsessive-compulsive disorder. The probable mechanism of action that imparts the pharmacological potential has also been explored. However, in-depth studies are needed on the clinical use of W. somnifera against human diseases. Besides, detailed toxicological analysis is also to be performed for its safe and efficacious use in preclinical and clinical studies and as a health-promoting herb.
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Affiliation(s)
- Subhabrata Paul
- School of Biotechnology, Presidency University (2nd Campus), Kolkata 700156, West Bengal, India
| | - Shreya Chakraborty
- Department of Life Sciences, Presidency University, 86/1 College Street, Kolkata 700073, West Bengal, India
| | - Uttpal Anand
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Swarnali Dey
- Department of Botany, University of Calcutta, Kolkata 700019, West Bengal, India
| | - Samapika Nandy
- Department of Life Sciences, Presidency University, 86/1 College Street, Kolkata 700073, West Bengal, India
| | - Mimosa Ghorai
- Department of Life Sciences, Presidency University, 86/1 College Street, Kolkata 700073, West Bengal, India
| | - Suchismita Chatterjee Saha
- Department of Zoology, Nabadwip Vidyasagar College (Affiliated to the University of Kalyani), Nabadwip 741302, West Bengal, India
| | - Manoj Tukaram Patil
- Post Graduate Department of Botany, SNJB's KKHA Arts, SMGL Commerce and SPHJ Science College (Affiliated to Savitribai Phule Pune University), Chandwad, Nashik 423101, Maharashtra, India
| | - Ramesh Kandimalla
- CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad 500007, Telangana, India; Department of Biochemistry, Kakatiya Medical College, Warangal-506007, Telangana, India
| | - Jarosław Proćków
- Department of Plant Biology, Institute of Environmental Biology, Wrocław University of Environmental and Life Sciences, Kożuchowska 5b, 51-631 Wrocław, Poland.
| | - Abhijit Dey
- Department of Life Sciences, Presidency University, 86/1 College Street, Kolkata 700073, West Bengal, India.
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Adebayo OG, Onasanwo SA, Ajayi AM, Aduema W, Oyebanjo OT, Nicodemus OU. Cnidoscolus aconitifolius-supplemented diet enhanced neurocognition, endogenous antioxidants and cholinergic system and maintains hippocampal neuronal integrity in male Wistar rats. Drug Metab Pers Ther 2021; 37:81-93. [PMID: 35385891 DOI: 10.1515/dmpt-2021-0138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 06/07/2021] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Cnidoscolus aconitifolius have been investigated to have abundant phytochemicals. However, study on the effect of Cnidoscolus aconitifolius on neurobehavioral performance when supplemented with diet is lacking. The study is aimed at investigating the memory-enhancing effect of Cnidoscolus aconitifolius-supplemented diet (CAD) using Morris water maze and Novel object recognition test. METHODS Ninety male Wistar rats (80-100 g) were fed with CAD (1, 2.5, 5 and 10%) continuously for a period of 4, 8 and 12 weeks respectively. Six animals per group were used for assessment of memory performance (Morris water maze [MWM] and Novel object recognition test [NORT]); afterwards the brain tissues were harvested for malondialdehyde (MDA), glutathione (GSH) and catalase (CAT) estimation. Acetylcholinesterase (AChE) concentration was also determined. Hippocampal architectural change in the neuron was examined using hematoxylin and eosin (H&E) and cresyl fast violet (Nissl) stain. RESULTS Higher percentage of CAD significantly (p<0.05) improve memory performance with time-dependent effects in rats fed with CAD on MMW and NORT. MDA significantly (p<0.05) reduce in 1 and 2.5% CAD groups at 4th weeks and in 2.5 and 5% CAD groups at 8th weeks while GSH concentration significantly (p<0.05) increase at 12th weeks in 2.5 and 10% CAD groups. However, CAT concentration significantly (p<0.05) increase in 2.5, and 5%, CAD groups, 1, 5, and 10% CAD groups and in 5, and 10% CAD groups at 4th, 8th and 12th weeks. AChE significantly (p<0.05) reduce at 4th and 12th weeks. Histological assessment reveals no neuronal and pyramidal degeneration (chromatolysis) at the hippocampal Cornu Ammonis 3 (CA3) region. CONCLUSIONS The results suggest that CAD boost memory performance in rats through positive modulation of oxidative stress, cholinergic system and degeneration of hippocampal neurons.
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Affiliation(s)
- Olusegun G Adebayo
- Department of Physiology, Neurosciences and Oral Physiology Unit, University of Ibadan, Ibadan, Nigeria.,Department of Physiology, Neurophysiology Unit, PAMO University of Medical Sciences, Port-Harcourt, Nigeria
| | - Samuel A Onasanwo
- Department of Physiology, Neurosciences and Oral Physiology Unit, University of Ibadan, Ibadan, Nigeria
| | - Abayomi M Ajayi
- Department of Pharmacology, Neuropharmacology Unit, University of Ibadan, Ibadan, Nigeria
| | - Wadioni Aduema
- Department of Physiology, Faculty of Basic Medical Sciences, Bayelsa Medical University, Yenagoa, Bayelsa State, Nigeria
| | - Oyetola T Oyebanjo
- Department of Physiology, Neurosciences and Oral Physiology Unit, University of Ibadan, Ibadan, Nigeria.,Department of Physiology, Babcock University, Ilishan-Remo, Nigeria
| | - Omeje U Nicodemus
- Department of Physiology, Neurosciences and Oral Physiology Unit, University of Ibadan, Ibadan, Nigeria
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Adebayo OG, Onasanwo SA, Ajayi AM, Aduema W, Oyebanjo OT, Nicodemus OU. Cnidoscolus aconitifolius-supplemented diet enhanced neurocognition, endogenous antioxidants and cholinergic system and maintains hippocampal neuronal integrity in male Wistar rats. Drug Metab Pers Ther 2021; 0:dmdi-2021-0138. [PMID: 34390637 DOI: 10.1515/dmdi-2021-0138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 06/07/2021] [Indexed: 12/12/2022]
Abstract
OBJECTIVES Cnidoscolus aconitifolius have been investigated to have abundant phytochemicals. However, study on the effect of Cnidoscolus aconitifolius on neurobehavioral performance when supplemented with diet is lacking. The study is aimed at investigating the memory-enhancing effect of Cnidoscolus aconitifolius-supplemented diet (CAD) using Morris water maze and Novel object recognition test. METHODS Ninety male Wistar rats (80-100 g) were fed with CAD (1, 2.5, 5 and 10%) continuously for a period of 4, 8 and 12 weeks respectively. Six animals per group were used for assessment of memory performance (Morris water maze [MWM] and Novel object recognition test [NORT]); afterwards the brain tissues were harvested for malondialdehyde (MDA), glutathione (GSH) and catalase (CAT) estimation. Acetylcholinesterase (AChE) concentration was also determined. Hippocampal architectural change in the neuron was examined using hematoxylin and eosin (H&E) and cresyl fast violet (Nissl) stain. RESULTS Higher percentage of CAD significantly (p<0.05) improve memory performance with time-dependent effects in rats fed with CAD on MMW and NORT. MDA significantly (p<0.05) reduce in 1 and 2.5% CAD groups at 4th weeks and in 2.5 and 5% CAD groups at 8th weeks while GSH concentration significantly (p<0.05) increase at 12th weeks in 2.5 and 10% CAD groups. However, CAT concentration significantly (p<0.05) increase in 2.5, and 5%, CAD groups, 1, 5, and 10% CAD groups and in 5, and 10% CAD groups at 4th, 8th and 12th weeks. AChE significantly (p<0.05) reduce at 4th and 12th weeks. Histological assessment reveals no neuronal and pyramidal degeneration (chromatolysis) at the hippocampal Cornu Ammonis 3 (CA3) region. CONCLUSIONS The results suggest that CAD boost memory performance in rats through positive modulation of oxidative stress, cholinergic system and degeneration of hippocampal neurons.
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Affiliation(s)
- Olusegun G Adebayo
- Department of Physiology, Neurosciences and Oral Physiology Unit, University of Ibadan, Ibadan, Nigeria
- Department of Physiology, Neurophysiology Unit, PAMO University of Medical Sciences, Port-Harcourt, Nigeria
| | - Samuel A Onasanwo
- Department of Physiology, Neurosciences and Oral Physiology Unit, University of Ibadan, Ibadan, Nigeria
| | - Abayomi M Ajayi
- Department of Pharmacology, Neuropharmacology Unit, University of Ibadan, Ibadan, Nigeria
| | - Wadioni Aduema
- Department of Physiology, Faculty of Basic Medical Sciences, Bayelsa Medical University, Yenagoa, Bayelsa State, Nigeria
| | - Oyetola T Oyebanjo
- Department of Physiology, Neurosciences and Oral Physiology Unit, University of Ibadan, Ibadan, Nigeria
- Department of Physiology, Babcock University, Ilishan-Remo, Nigeria
| | - Omeje U Nicodemus
- Department of Physiology, Neurosciences and Oral Physiology Unit, University of Ibadan, Ibadan, Nigeria
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Experimental evidence and mechanism of action of some popular neuro-nutraceutical herbs. Neurochem Int 2021; 149:105124. [PMID: 34245808 DOI: 10.1016/j.neuint.2021.105124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 06/28/2021] [Accepted: 06/30/2021] [Indexed: 12/12/2022]
Abstract
Brain and neuronal circuits constitute the most complex organ networks in human body. They not only control and coordinate functions of all other organs, but also represent one of the most-affected systems with stress, lifestyle and age. With global increase in aging populations, these neuropathologies have emerged as major concern for maintaining quality of life. Recent era has witnessed a surge in nutritional remediation of brain dysfunctions primarily by "nutraceuticals" that refer to functional foods and supplements with pharmacological potential. Specific dietary patterns with a balanced intake of carbohydrates, fatty acids, vitamins and micronutrients have also been ascertained to promote brain health. Dietary herbs and their phytochemicals with wide range of biological and pharmacological activities and minimal adverse effects have gained remarkable attention as neuro-nutraceuticals. Neuro-nutraceutical potentials of herbs are often expressed as effects on cognitive response, circadian rhythm, neuromodulatory, antioxidant and anti-inflammatory activities that are mediated by effects on gene expression, epigenetics, protein synthesis along with their turnover and metabolic pathways. Epidemiological and experimental evidence have implicated enormous applications of herbal supplementation in neurodegenerative and psychiatric disorders. The present review highlights the identification, experimental evidence and applications of some herbs including Bacopa monniera, Withania somnifera, Curcuma longa, Helicteres angustifolia, Undaria pinnatifida, Haematococcus pluvialis, and Vitis vinifera, as neuro-nutraceuticals.
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Afewerky HK, Ayodeji AE, Tiamiyu BB, Orege JI, Okeke ES, Oyejobi AO, Bate PNN, Adeyemi SB. Critical review of the Withania somnifera (L.) Dunal: ethnobotany, pharmacological efficacy, and commercialization significance in Africa. BULLETIN OF THE NATIONAL RESEARCH CENTRE 2021; 45:176. [PMID: 34697529 PMCID: PMC8529567 DOI: 10.1186/s42269-021-00635-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 10/08/2021] [Indexed: 05/10/2023]
Abstract
BACKGROUND Withania somnifera (L.) Dunal (W. somnifera) is a herb commonly known by its English name as Winter Cherry. Africa is indigenous to many medicinal plants and natural products. However, there is inadequate documentation of medicinal plants, including W. somnifera, in Africa. There is, therefore, a need for a comprehensive compilation of research outcomes of this reviewed plant as used in traditional medicine in different regions of Africa. METHODOLOGY Scientific articles and publications were scooped and sourced from high-impact factor journals and filtered with relevant keywords on W. somnifera. Scientific databases, including GBIF, PubMed, NCBI, Google Scholar, Research Gate, Science Direct, SciFinder, and Web of Science, were accessed to identify the most influential articles and recent breakthroughs published on the contexts of ethnography, ethnomedicinal uses, phytochemistry, pharmacology, and commercialization of W. somnifera. RESULTS This critical review covers the W. somnifera ethnography, phytochemistry, and ethnomedicinal usage to demonstrate the use of the plant in Africa and elsewhere to prevent or alleviate several pathophysiological conditions, including cardiovascular, neurodegenerative, reproductive impotence, as well as other chronic diseases. CONCLUSION W. somnifera is reportedly safe for administration in ethnomedicine as several research outcomes confirmed its safety status. The significance of commercializing this plant in Africa for drug development is herein thoroughly covered to provide the much-needed highlights towards its cultivations economic benefit to Africa.
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Affiliation(s)
- Henok Kessete Afewerky
- Department of Neurobiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 China
- Department of Pathology and Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 China
- School of Allied Health Professions, Asmara College of Health Sciences, 00291 Asmara, Eritrea
- Organization of African Academic Doctors, Nairobi, 00100 Kenya
| | - Ayeni Emmanuel Ayodeji
- Organization of African Academic Doctors, Nairobi, 00100 Kenya
- Department of Pharmacognosy and Drug Development, Ahmadu Bello University Zaria, PMB 1044, Kaduna, 800211 Nigeria
| | - Bashir Bolaji Tiamiyu
- Organization of African Academic Doctors, Nairobi, 00100 Kenya
- Department of Plant Biology, Faculty of Life Sciences, University of Ilorin, Ilorin, 240001 Nigeria
| | - Joshua Iseoluwa Orege
- Organization of African Academic Doctors, Nairobi, 00100 Kenya
- Department of Industrial Chemistry, Ekiti State University, PMB 5363, Ado-Ekiti, 362001 Nigeria
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China
| | - Emmanuel Sunday Okeke
- Organization of African Academic Doctors, Nairobi, 00100 Kenya
- Department of Biochemistry, FBS and Natural Science Unit, SGS, University of Nigeria, Nsukka, 410001 Nigeria
- School of Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013 China
| | - Aanuoluwapo Opeyemi Oyejobi
- Organization of African Academic Doctors, Nairobi, 00100 Kenya
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China
| | - Petuel Ndip Ndip Bate
- Organization of African Academic Doctors, Nairobi, 00100 Kenya
- Guangzhou Institute of Biomedicine and Health, Guangzhou, 510530 China
| | - Sherif Babatunde Adeyemi
- Organization of African Academic Doctors, Nairobi, 00100 Kenya
- Department of Plant Biology, Faculty of Life Sciences, University of Ilorin, Ilorin, 240001 Nigeria
- C.G. Bhakta Institute of Biotechnology, Uka Tarsadia University, Bardoli-Mahuva Road, Bardoli, Surat, Gujarat 394350 India
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Tinospora cordifolia ameliorates brain functions impairments associated with high fat diet induced obesity. Neurochem Int 2020; 143:104937. [PMID: 33309979 DOI: 10.1016/j.neuint.2020.104937] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 12/07/2020] [Accepted: 12/08/2020] [Indexed: 02/06/2023]
Abstract
Obesity is a rapidly growing health problem worldwide and its prevalence has increased markedly in both the developing and developed nations. It is associated with a range of co-morbidities such as cardiovascular disease, type 2 diabetes mellitus, and cognitive dysfunctions. Therefore, the need for a safe and effective treatment has led to the exploration of natural products for the management of obesity. In the present study, we tested the anxiolytic, anti-apoptotic, and anti-neuroinflammatory potential of Tinospora cordifolia in a high fat diet-induced obesity rat model system. Young female Wistar albino rats were divided into three groups: (1) Low fat diet (LFD), fed on normal chow feed; (2) High fat diet (HFD), fed on diet containing 30% fat by weight; and (3) High fat diet containing extract (HFDE), fed on high fat diet supplemented with the stem powder of T. cordifolia (TCP). The rats from each group were kept on their respective feeding regimen for 12 weeks. The body weight and calorie intake were recorded weekly. The elevated plus maze test and rotarod performance test were performed to evaluate the anxiety-like behavior and locomotor coordination, respectively. The levels of serum cytokines (IL-6 and TNF-α) were estimated and various markers for inflammation, synaptic plasticity, apoptosis, and energy homeostasis were studied by western blotting. The HFDE rats showed reduced anxiety-like behavior and improved locomotor behavior as compared to HFD-induced obese rats. The TCP supplementation in high fat diet suppressed the expression of inflammatory molecules, including serum cytokines (IL-6 and TNF-α), and modulated apoptosis and synaptic plasticity. TCP was found to be effective in managing body weight in HFD-fed rats by maintaining energy metabolism and cellular homeostasis. T. cordifolia may be recommended as a potential therapeutic agent to prevent the adverse effects of obesity and obesity-associated brain dysfunctions.
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Saini V, Kaur T, Kalotra S, Kaur G. The neuroplasticity marker PSA-NCAM: Insights into new therapeutic avenues for promoting neuroregeneration. Pharmacol Res 2020; 160:105186. [DOI: 10.1016/j.phrs.2020.105186] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 08/25/2020] [Accepted: 08/30/2020] [Indexed: 02/06/2023]
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Singh H, Sharma AK, Gupta M, Singh AP, Kaur G. Tinospora cordifolia attenuates high fat diet-induced obesity and associated hepatic and renal dysfunctions in rats. PHARMANUTRITION 2020. [DOI: 10.1016/j.phanu.2020.100189] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Gabbia D, Saponaro M, Sarcognato S, Guido M, Ferri N, Carrara M, De Martin S. Fucus vesiculosus and Ascophyllum nodosum Ameliorate Liver Function by Reducing Diet-Induced Steatosis in Rats. Mar Drugs 2020; 18:E62. [PMID: 31963560 PMCID: PMC7024370 DOI: 10.3390/md18010062] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/11/2020] [Accepted: 01/13/2020] [Indexed: 12/16/2022] Open
Abstract
The Asian coastal communities have used the brown seaweeds Fucus vesiculosus and Ascophyllum nodosum since ancient times. Recently, some in vitro and in vivo studies have demonstrated their abilities in reducing risk factors for metabolic syndrome. Here, we analyzed the protective effect of a phytocomplex extracted from these seaweeds on the deposition of fat in the liver after the administration of a high-fat diet (HFD) to rats for five weeks. The administration of F. vesiculosus and A. nodosum led to significant reductions in microvescicular steatosis and plasma biochemical and lipid parameters, such as alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), total and conjugated bilirubin, and triglycerides. Furthermore, the postprandial glycemic peak was delayed and significantly reduced (p < 0.01) by the algal extract administration. In conclusion, this extract is effective in reducing microvescicular steatosis and improving glycemic control, thereby lowering the risk of nonalcoholic fatty liver disease, obesity, and diabetes, diseases related to the consumption of fat and sugar-enriched diets.
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Affiliation(s)
- Daniela Gabbia
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35100 Padova, Italy; (D.G.); (N.F.); (M.C.)
| | - Miriam Saponaro
- Department of Medicine, University of Padova, 35100 Padova, Italy;
- Venetian Institute of Molecular Medicine—VIMM, 35100 Padova, Italy
| | - Samantha Sarcognato
- Department of Medicine, General Pathology and Cytophatology Unit, University of Padova, 35100 Padova, Italy; (S.S.); (M.G.)
- Department of Pathology, Azienda ULSS2 Marca Trevigiana, 31100 Treviso, Italy
| | - Maria Guido
- Department of Medicine, General Pathology and Cytophatology Unit, University of Padova, 35100 Padova, Italy; (S.S.); (M.G.)
- Department of Pathology, Azienda ULSS2 Marca Trevigiana, 31100 Treviso, Italy
| | - Nicola Ferri
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35100 Padova, Italy; (D.G.); (N.F.); (M.C.)
| | - Maria Carrara
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35100 Padova, Italy; (D.G.); (N.F.); (M.C.)
| | - Sara De Martin
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35100 Padova, Italy; (D.G.); (N.F.); (M.C.)
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Ng QX, Loke W, Foo NX, Tan WJ, Chan HW, Lim DY, Yeo WS. A systematic review of the clinical use of Withania somnifera (Ashwagandha) to ameliorate cognitive dysfunction. Phytother Res 2019; 34:583-590. [PMID: 31742775 DOI: 10.1002/ptr.6552] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 08/25/2019] [Accepted: 10/28/2019] [Indexed: 11/12/2022]
Abstract
Many developed countries are experiencing a rapidly "greying" population, and cognitive decline is common in the elderly. There is no cure for dementia, and pharmacotherapy options to treat cognitive dysfunction provide limited symptomatic improvements. Withania somnifera (Ashwagandha), a popular herb highly valued in Ayurvedic medicine, has often been used to aid memory and cognition. This systematic review thus aimed to evaluate the clinical evidence base and investigate the potential role of W. somnifera in managing cognitive dysfunction. Using the following keywords [withania somnifera OR indian ginseng OR Ashwagandha OR winter cherry] AND [brain OR cognit* OR mental OR dementia OR memory], a comprehensive search of PubMed, EMBASE, Medline, PsycINFO and Clinicaltrials.gov databases found five clinical studies that met the study's eligibility criteria. Overall, there is some early clinical evidence, in the form of randomized, placebo-controlled, double-blind trials, to support the cognitive benefits of W. somnifera supplementation. However, a rather heterogeneous study population was sampled, including older adults with mild cognitive impairment and adults with schizophrenia, schizoaffective disorder, or bipolar disorder. In most instances, W. somnifera extract improved performance on cognitive tasks, executive function, attention, and reaction time. It also appears to be well tolerated, with good adherence and minimal side effects.
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Affiliation(s)
- Qin Xiang Ng
- MOH Holdings Pte Ltd., 1 Maritime Square, 099253, Singapore, Singapore.,Institute of Mental Health, 10 Buangkok View, 539747, Singapore, Singapore
| | - Wayren Loke
- MOH Holdings Pte Ltd., 1 Maritime Square, 099253, Singapore, Singapore
| | - Nadine Xinhui Foo
- MOH Holdings Pte Ltd., 1 Maritime Square, 099253, Singapore, Singapore
| | - Weng Jun Tan
- MOH Holdings Pte Ltd., 1 Maritime Square, 099253, Singapore, Singapore.,Institute of Mental Health, 10 Buangkok View, 539747, Singapore, Singapore
| | - Hwei Wuen Chan
- National University Hospital, National University Health System, 119074, Singapore, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, 117597, Singapore, Singapore
| | - Donovan Yutong Lim
- Institute of Mental Health, 10 Buangkok View, 539747, Singapore, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, 117597, Singapore, Singapore
| | - Wee Song Yeo
- National University Hospital, National University Health System, 119074, Singapore, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, 117597, Singapore, Singapore
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Butanol Extract of Tinospora cordifolia Ameliorates Cognitive Deficits Associated with Glutamate-Induced Excitotoxicity: A Mechanistic Study Using Hippocampal Neurons. Neuromolecular Med 2019; 22:81-99. [DOI: 10.1007/s12017-019-08566-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 08/21/2019] [Indexed: 01/08/2023]
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18
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Bawari S, Tewari D, Argüelles S, Sah AN, Nabavi SF, Xu S, Vacca RA, Nabavi SM, Shirooie S. Targeting BDNF signaling by natural products: Novel synaptic repair therapeutics for neurodegeneration and behavior disorders. Pharmacol Res 2019; 148:104458. [DOI: 10.1016/j.phrs.2019.104458] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 09/13/2019] [Accepted: 09/15/2019] [Indexed: 12/12/2022]
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Gao Z. Diets, obesity and inflammation for cognitive disorder: which is a true risk? Which is a confounding risk? J Public Health (Oxf) 2019; 41:646-647. [PMID: 30239911 DOI: 10.1093/pubmed/fdy162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 08/12/2018] [Accepted: 08/24/2018] [Indexed: 11/12/2022] Open
Affiliation(s)
- Zhenhua Gao
- Department of Cardiology, Han Dan Central Hospital, No. 15 South of Zhong Hua Street, Han Shan District, Han Dan, People's Republic of China
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Gupta M, Kaur G. Withania somnifera (L.) Dunal ameliorates neurodegeneration and cognitive impairments associated with systemic inflammation. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 19:217. [PMID: 31416451 PMCID: PMC6694620 DOI: 10.1186/s12906-019-2635-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 08/08/2019] [Indexed: 12/31/2022]
Abstract
BACKGROUND Systemic inflammation driven neuroinflammation is an event which correlates with pathogenesis of several neurodegenerative diseases. Therefore, targeting peripheral and central inflammation simultaneously could be a promising approach for the management of these diseases. Nowadays, herbal medicines are emerging as potent therapeutics against various brain pathologies. Therefore, in this contemporary study, the neuroprotective activity of Ashwagandha (Withania somnifera) was elucidated against the inflammation associated neurodegeneration and cognitive impairments induced by systemic LPS administration using in vivo rat model system. METHODS To achieve this aim, young adult wistar strain male albino rats were randomized into four groups: (i) Control, (ii) LPS alone, (iii) LPS + ASH-WEX, (iv) ASH-WEX alone. Post regimen, the animals were subjected to Rotarod, Narrow Beam Walking and Novel Object Recognition test to analyze their neuromuscular coordination, working memory and learning functions. The rats were then sacrificed to isolate the brain regions and expression of proteins associated with synaptic plasticity and cell survival was studied using Western blotting and Quantitative real time PCR. Further, neuroprotective potential of ASH-WEX and its active fraction (FIV) against inflammatory neurodegeneration was studied and validated using in vitro model system of microglial conditioned medium-treated neuronal cultures and microglial-neuronal co-cultures. RESULTS Orally administered ASH-WEX significantly suppressed the cognitive and motor-coordination impairments in rats. On the molecular basis, ASH-WEX supplementation also regulated the expression of various proteins involved in synaptic plasticity and neuronal cell survival. Since microglial-neuronal crosstalk is crucial for maintaining CNS homeostasis, the current study was further extended to ascertain whether LPS-mediated microglial activation caused damage to neurons via direct cell to cell contact or through secretion of inflammatory mediators. ASH-WEX and FIV pretreatment was found to restore neurite outgrowth and protect neurons from apoptotic cell death caused by LPS-induced neuroinflammation in both activated microglial conditioned medium-treated neuronal cultures as well as microglial-neuronal co-cultures. CONCLUSION This extensive study using in vivo and in vitro model systems provides first ever pre-clinical evidence that ASH-WEX can be used as a promising natural therapeutic remedial for the prevention of neurodegeneration and cognitive impairments associated with peripheral inflammation and neuroinflammation.
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Affiliation(s)
- Muskan Gupta
- Department of Biotechnology, Medical Biotechnology Laboratory, Guru Nanak Dev University, Amritsar, Amritsar, Punjab 143005 India
| | - Gurcharan Kaur
- Department of Biotechnology, Medical Biotechnology Laboratory, Guru Nanak Dev University, Amritsar, Amritsar, Punjab 143005 India
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Onaolapo AY, Obelawo AY, Onaolapo OJ. Brain Ageing, Cognition and Diet: A Review of the Emerging Roles of Food-Based Nootropics in Mitigating Age-related Memory Decline. Curr Aging Sci 2019; 12:2-14. [PMID: 30864515 PMCID: PMC6971896 DOI: 10.2174/1874609812666190311160754] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 02/16/2019] [Accepted: 02/27/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Age-related cognitive decline has been suggested to result from an increase in the brain neuron loss, which is attributable to continued derangement of the brain's oxidant/ antioxidant balance. Increased oxidative stress and a concomitant decrease in the brain's antioxidant defense system have been associated with functional senescence and organismal ageing. However, nature has configured certain foods to be rich sources of nootropic agents, with research showing that increased consumption of such foods or food ingredients may be protective against ageing-related memory decline. This knowledge is becoming increasingly valuable in an era when the boundary that separates food from medicine is becoming blurred. In this review, we examine extant literature dealing with the impact of ageing on brain structure and function, with an emphasis on the roles of oxidative stress. Secondly, we review the benefits of food-based antioxidants with nootropic effects and/or food-based nootropic agents in mitigating memory decline; with a view to improving our understanding of likely mechanisms. We also highlight some of the limitations to the use of food-based nootropics and suggest ways in which they can be better employed in the clinical management of age-related cognitive decline. CONCLUSION While it is known that the human brain endures diverse insults in the process of ageing, food-based nootropics are likely to go a long way in mitigating the impacts of these insults. Further research is needed before we reach a point where food-based nootropics are routinely prescribed.
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Affiliation(s)
| | | | - Olakunle James Onaolapo
- Address correspondence to this author at the Behavioural Neuroscience/Neuropharmacology Unit, Department of Pharmacology, Ladoke
Akintola University of Technology, Osogbo, Osun State, Nigeria;
Tel: 2347031986101; E-mail:
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Gupta M, Kaur G. Withania somnifera as a Potential Anxiolytic and Anti-inflammatory Candidate Against Systemic Lipopolysaccharide-Induced Neuroinflammation. Neuromolecular Med 2018; 20:343-362. [DOI: 10.1007/s12017-018-8497-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 05/24/2018] [Indexed: 12/14/2022]
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Kaur T, Kaur G. Withania somnifera as a potential candidate to ameliorate high fat diet-induced anxiety and neuroinflammation. J Neuroinflammation 2017; 14:201. [PMID: 29025435 PMCID: PMC5639730 DOI: 10.1186/s12974-017-0975-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 10/02/2017] [Indexed: 01/04/2023] Open
Abstract
Background The epidemic of obesity has reached alarming levels in both developing and developed nations. Excessive calorie intake and sedentary lifestyle due to technological advancements are the main causal factors for overweight and obesity among the human population. Obesity has been associated with a number of co-morbidities such as hypertension, type 2 diabetes mellitus, cardiovascular diseases, and neurodegeneration and dementia. The progression of neurological disorders in obese subjects has been mainly attributed to neuroinflammation. Withania somnifera has been used in numerous Ayurvedic formulations owing to its wide array of health-promoting properties. The current study was designed to test the hypothesis whether dry leaf powder of W. somnifera has anxiolytic and anti-neuroinflammatory potential in diet-induced obesity. Methods Young adult female rats were divided into four groups: low fat diet group (LFD) fed with regular chow feed, high fat diet group (HFD) fed with diet containing 30% fat by weight, low fat diet plus extract group (LFDE) fed with regular chow feed supplemented with dry leaf powder of W. somnifera 1 mg/g of body weight (ASH), and high fat diet plus extract group (HFDE) fed with diet containing 30% fat by weight and supplemented with ASH. All the animals were kept on respective feeding regimen for 12 weeks; following which, the animals were tested for their anxiety-like behavior using elevated plus maze test. The animals were sacrificed and used to study various inflammatory markers such as GFAP, Iba1, PPARγ, iNOS, MCP-1, TNFα, IL-1β, IL-6, and various markers of NF-κB pathway by Western blotting and quantitative real-time PCR. Serum levels of leptin, insulin and pro-inflammatory cytokines were also assayed. Results ASH treated rats showed less anxiety levels as compared to HFD animals. At molecular level, ASH ameliorated the HFD-induced reactive gliosis and microgliosis and suppressed the expression of inflammatory markers such as PPARγ, iNOS, MCP-1, TNFα, IL-1β, and IL-6. Further, ASH ameliorated leptin and insulin resistance and prevented HFD-induced apoptosis. Conclusions Dry leaf powder of W. somnifera may prove to be a potential therapeutic agent to attenuate neuroinflammation associated with obesity and may prevent its co-morbidities.
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Affiliation(s)
- Taranjeet Kaur
- Department of Biotechnology, Guru Nanak Dev University, Amritsar, Punjab, 143005, India
| | - Gurcharan Kaur
- Department of Biotechnology, Guru Nanak Dev University, Amritsar, Punjab, 143005, India.
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