15 results on '"Rathor L"'
Search Results
2. Verminoside mediates life span extension and alleviates stress in Caenorhabditis elegans.
- Author
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Pant, A., Asthana, J., Yadav, A. K., Rathor, L., Srivastava, S., Gupta, M. M., and Pandey, R.
- Subjects
CAENORHABDITIS elegans ,AGE factors in disease ,LIFE spans ,OXYGEN in the body ,OXIDATIVE stress ,DRUG development - Abstract
The discovery of bioactive molecules modulating aging in living organism promotes development of natural therapeutics for curing age-related afflictions. The progression in age-related disorders can be attributed to increment in intracellular reactive oxygen species (ROS) and oxidative stress level. To this end, we isolated an iridoid verminoside (VMS) fromStereospermum suaveolens(Roxb.) DC. and evaluated its effect onCaenorhabditis elegans. The present study delineates VMS-mediated alteration of intracellular ROS, oxidative stress, and life span inC. elegans.The different tested doses of VMS (5 μM, 25 μM, and 50 μM) were able to enhance ROS scavenging and extend mean life span inC. elegans. The maximal life span extension was observed in 25 μM VMS, that is, 20.79% (P< 0.0001) followed by 9.84% (P< 0.0001) in 5 μM VMS and 8.54% (P< 0.0001) in 50 μM VMS. VMS was able to alleviate juglone-induced oxidative stress and enhanced thermotolerance in worms. The stress-modulating and ROS-scavenging potential of VMS was validated by increment in mean survival by 29.54% (P< 0.0001) in VMS-treated oxidative stress hypersensitivemev-1 mutant strain. Furthermore, VMS modulates expression of DAF-16 (a FoxO transcription factor) promoting stress resistance and longevity. Altogether, our results suggest that VMS attenuates intracellular ROS and stress (oxidative and thermal) level promoting longevity. The longevity and stress modulation can be attributed to VMS-mediated alterations indaf-16expression which regulates insulin signaling pathway. This study opens doors for development of phytomolecule-based therapeutics for prolonging life span and managing age-related severe disorders. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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3. Mitochondrial stress in GABAergic neurons non-cell autonomously regulates organismal health and aging.
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Rathor L, Curry S, Park Y, McElroy T, Robles B, Sheng Y, Chen WW, Min K, Xiao R, Lee MH, and Han SM
- Abstract
Mitochondrial stress within the nervous system can trigger non-cell autonomous responses in peripheral tissues. However, the specific neurons involved and their impact on organismal aging and health have remained incompletely understood. Here, we demonstrate that mitochondrial stress in γ-aminobutyric acid-producing (GABAergic) neurons in Caenorhabditis elegans ( C. elegans ) is sufficient to significantly alter organismal lifespan, stress tolerance, and reproductive capabilities. This mitochondrial stress also leads to significant changes in mitochondrial mass, energy production, and levels of reactive oxygen species (ROS). DAF-16/FoxO activity is enhanced by GABAergic neuronal mitochondrial stress and mediates the induction of these non-cell-autonomous effects. Moreover, our findings indicate that GABA signaling operates within the same pathway as mitochondrial stress in GABAergic neurons, resulting in non-cell-autonomous alterations in organismal stress tolerance and longevity. In summary, these data suggest the crucial role of GABAergic neurons in detecting mitochondrial stress and orchestrating non-cell-autonomous changes throughout the organism.
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- 2024
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4. Sex differences in frailty among older adults.
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Zeidan RS, McElroy T, Rathor L, Martenson MS, Lin Y, and Mankowski RT
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- Humans, Female, Male, Aged, Quality of Life, Sex Characteristics, Frail Elderly, Aging, Frailty
- Abstract
By definition, aging is a natural, gradual and continuous process. On the other hand, frailty reflects the increase in vulnerability to stressors and shortens the time without disease (health span) while longevity refers to the length of life (lifespan). The average life expectancy has significantly increased during the last few decades. A longer lifespan has been accompanied by an increase in frailty and decreased independence in older adults, with major differences existing between men and women. For example, women tend to live longer than men but also experience higher rates of frailty and disability. Sex differences prevent optimization of lifestyle interventions and therapies to effectively prevent frailty. Sex differences in frailty and aging are rooted in a complex interplay between uncontrollable (genetic, epigenetic, physiological), and controllable factors (psychosocial and lifestyle factors). Thus, understanding the underlying causes of sex differences in frailty and aging is essential for developing personalized interventions to promote healthy aging and improve quality of life in older men and women. In this review, we have discussed the key contributors and knowledge gaps related to sex differences in aging and frailty., Competing Interests: Declaration of competing interest The authors declare no competing interests., (Copyright © 2023. Published by Elsevier Inc.)
- Published
- 2023
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5. frpr-18, a neuropeptide receptor, regulates organismal lifespan and stress tolerance in C. elegans .
- Author
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Ouaakki H, Joshi H, Rathor L, and Han SM
- Abstract
The mechanisms underlying neuropeptide signaling regulation of lifespan in Caenorhabditis elegans ( C. elegans ) remain unclear. FRPR-18 is a mammalian orexin/hypocretin-like receptor and modulates C. elegans arousal behavior by acting as a receptor for FLP-2 neuropeptide signaling, which is also associated with the systemic activation of the mitochondrial unfolded protein response (mitoUPR). Here we report our preliminary findings on the role of the frpr-18 gene in regulating lifespan and healthspan parameters, including stress resistance. Our results showed that frpr-18(ok2698) null mutants had a shorter lifespan and reduced survivability against thermal stress and paraquat treatment. On the other hand, loss of flp-2 function did not affect lifespan or paraquat tolerance but was necessary for normal thermal stress tolerance. These findings suggest that frpr-18 could play a role in regulating lifespan and stress resistance, possibly through flp-2 independent or parallel neuropeptide signaling pathways., Competing Interests: The authors declare that there are no conflicts of interest present., (Copyright: © 2023 by the authors.)
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- 2023
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6. Melatonin protects against cadmium-induced oxidative stress via mitochondrial STAT3 signaling in human prostate stromal cells.
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Hyun M, Kim H, Kim J, Lee J, Lee HJ, Rathor L, Meier J, Larner A, Lee SM, Moon Y, Choi J, Han SM, and Heo JD
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- Male, Humans, Animals, Mice, Reactive Oxygen Species metabolism, STAT3 Transcription Factor metabolism, Prostate, Fibroblasts metabolism, Mitochondria metabolism, Oxidative Stress, Cadmium metabolism, Melatonin pharmacology
- Abstract
Melatonin protects against Cadmium (Cd)-induced toxicity, a ubiquitous environmental toxicant that causes adverse health effects by increasing reactive oxygen species (ROS) production and mitochondrial dysfunction. However, the underlying mechanism remains unclear. Here, we demonstrate that Cd exposure reduces the levels of mitochondrially-localized signal transducer and activator of transcription 3 (mitoSTAT3) using human prostate stromal cells and mouse embryonic fibroblasts. Melatonin enhances mitoSTAT3 abundance following Cd exposure, which is required to attenuate ROS damage, mitochondrial dysfunction, and cell death caused by Cd exposure. Moreover, melatonin increases mitochondrial levels of GRIM-19, an electron transport chain component that mediates STAT3 import into mitochondria, which are downregulated by Cd. In vivo, melatonin reverses the reduced size of mouse prostate tissue and levels of mitoSTAT3 and GRIM-19 induced by Cd exposure. Together, these data suggest that melatonin regulates mitoSTAT3 function to prevent Cd-induced cytotoxicity and could preserve mitochondrial function during Cd-induced stress., (© 2023. The Author(s).)
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- 2023
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7. The role of mitochondria in the recovery of neurons after injury.
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McElroy T, Zeidan RS, Rathor L, Han SM, and Xiao R
- Abstract
Competing Interests: None
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- 2023
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8. Towards the development of phytoextract based healthy ageing cognitive booster formulation, explored through Caenorhabditis elegans model.
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Pandey R, Mani D, Shanker K, Bawankule DU, Chanda D, Lal RK, Pal A, Khare P, Kumar N, Tandon S, Saikia D, Gupta AK, Srivastava RK, Kumar S, Suresh R, Singh S, Kalra A, Maurya A, Singh DP, Pandey T, Trivedi S, Smita SS, Pant A, Rathor L, Asthana J, Trivedi M, and Trivedi PK
- Abstract
The positive effect of herbal supplements on aging and age-related disorders has led to the evolution of natural curatives for remedial neurodegenerative diseases in humans. The advancement in aging is exceedingly linked to oxidative stress. Enhanced oxidative stress interrupts health of humans in various ways, necessitating to find stress alleviating herbal resources. Currently, minimal scientifically validated health and cognitive booster resources are available. Therefore, we explored the impact of plant extracts in different combinations on oxidative stress, life span and cognition using the multicellular transgenic humanized C. elegans , and further validated the same in Mus musculus , besides testing their safety and toxicity. In our investigations, the final product-the HACBF (healthy ageing cognitive booster formulation) thus developed was found to reduce major aging biomarkers like lipofuscin, protein carbonyl, lipid levels and enhanced activity of antioxidant enzymes. Further confirmation was done using transgenic worms and RT-PCR. The cognitive boosting activities analyzed in C. elegans and M. musculus model system were found to be at par with donepezil and L-dopa, the two drugs which are commonly used to treat Parkinson's and Alzheimer's diseases. In the transgenic C. elegans model system, the HACBF exhibited reduced aggregation of misfolded disease proteins α-synuclein and increased the health of nicotinic acetylcholine receptor, levels of Acetylcholine and Dopamine contents respectively, the major neurotransmitters responsible for memory, language, learning behavior and movement. Molecular studies clearly indicate that HACBF upregulated major genes responsible for healthy aging and cognitive booster activities in C. elegans and as well as in M. musculus . As such, the present herbal product thus developed may be quite useful for healthy aging and cognitive boosting activities, and more so during this covid-19 pandemic., Supplementary Information: The online version contains supplementary material available at 10.1007/s13237-022-00407-1., Competing Interests: Conflict of interestThe authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© The Author(s) under exclusive licence to Archana Sharma Foundation of Calcutta 2022, Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.)
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- 2022
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9. Comparative toxicities of BPA, BPS, BPF, and TMBPF in the nematode Caenorhabditis elegans and mammalian fibroblast cells.
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Hyun M, Rathor L, Kim HJ, McElroy T, Hwang KH, Wohlgemuth S, Curry S, Xiao R, Leeuwenburgh C, Heo JD, and Han SM
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- Adenosine Triphosphate metabolism, Animals, Benzhydryl Compounds administration & dosage, Benzhydryl Compounds chemistry, Caenorhabditis elegans drug effects, Cell Survival drug effects, Cells, Cultured, Dose-Response Relationship, Drug, Environmental Pollutants administration & dosage, Environmental Pollutants chemistry, Fibroblasts cytology, Humans, Mice, Mitochondria drug effects, Mitochondria pathology, Phenols administration & dosage, Phenols chemistry, Reactive Oxygen Species metabolism, Sulfones administration & dosage, Sulfones chemistry, Benzhydryl Compounds toxicity, Environmental Pollutants toxicity, Fibroblasts drug effects, Phenols toxicity, Sulfones toxicity
- Abstract
Bisphenol A (BPA) is a chemical compound commonly used in the production of plastics for daily lives and industry. As BPA is well known for its adverse health effects, several alternative materials have been developed. This study comprehensively analyzed the toxicity of BPA and its three substitutes including bisphenol S (BPS), bisphenol F (BPF), and tetramethyl bisphenol F (TMBPF) on aging, healthspan, and mitochondria using an in vivo Caenorhabditis elegans (C. elegans) model animal and cultured mammalian fibroblast cells. C. elegans treated with 1 mM BPA exhibited abnormalities in the four tested parameters related to development and growth, including delayed development, decreased body growth, reduced reproduction, and abnormal tissue morphology. Exposure to the same concentration of each alternative including TMBPF, which has been proposed as a relatively safe BPA alternative, detrimentally affected at least three of these events. Moreover, all bisphenols (except BPS) remarkably shortened the organismal lifespan and increased age-related changes in neurons. Exposure to BPA and BPF resulted in mitochondrial abnormalities, such as reduced oxygen consumption and mitochondrial membrane potential. In contrast, the ATP levels were noticeably higher after treatment with all bisphenols. In mammalian fibroblast cells, exposure to increasing concentrations of all bisphenols (ranging from 50 μM to 500 μM) caused a severe decrease in cell viability in a dose-dependent manner. BPA increased ATP levels and decreased ROS but did not affect mitochondrial permeability transition pores (mPTP). Notably, TMBPF was the only bisphenol that caused a significant increase in mitochondrial ROS and mPTP opening. These results suggest that the potentially harmful physiological effects of BPA alternatives should be considered., (Copyright © 2021 The Authors. Published by Elsevier B.V. All rights reserved.)
- Published
- 2021
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10. Discovery of a New Donepezil-like Acetylcholinesterase Inhibitor for Targeting Alzheimer's Disease: Computational Studies with Biological Validation.
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Akhoon BA, Choudhary S, Tiwari H, Kumar A, Barik MR, Rathor L, Pandey R, and Nargotra A
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- Acetylcholinesterase metabolism, Binding Sites, Donepezil, Humans, Alzheimer Disease drug therapy, Cholinesterase Inhibitors pharmacology, Cholinesterase Inhibitors therapeutic use
- Abstract
Alzheimer's disorder is one of the most common worldwide health problems, and its prevalence continues to increase, thereby straining the healthcare budgets of both developed and developing countries. So far, donepezil is the only Food and Drug Administration-approved dual-binding site inhibitor of acetylcholinesterase (AChE) that can amplify the cholinergic activity and also decrease Aβ aggregation in Alzheimer patients. We report herein a new donepezil-like natural compound derivative (D1) as a convincing AChE inhibitor. The in silico studies suggests that D1 exhibits a dual-binding mode of action and interacts with both the catalytic anionic site and peripheral anionic site (PAS) of human AChE. The biological studies confirm the dual-binding site character of D1 and revealed that D1 not only enhances the acetylcholine levels but also reduces the accumulation of Aβ plaques in Caenorhabditis elegans . In fact, 5 μM D1 was seen more potent in elevating the acetylcholine expression than 25 μM donepezil. While most of the non-cholinergic functions of donepezil, associated with the PAS of AChE, were gradually lost at higher concentrations, D1 was more functional at similar doses. Promisingly, D1 also exerted an agonistic effect on the α7 nicotinic acetylcholine receptor.
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- 2020
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11. C. elegans protein interaction network analysis probes RNAi validated pro-longevity effect of nhr-6, a human homolog of tumor suppressor Nr4a1.
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Akhoon BA, Gupta SK, Tiwari S, Rathor L, Pant A, Singh N, Gupta SK, Dandekar T, and Pandey R
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- Animals, Caenorhabditis elegans genetics, Humans, Protein Interaction Maps, Caenorhabditis elegans metabolism, Caenorhabditis elegans Proteins metabolism, Genes, Tumor Suppressor, Molecular Probes, Nuclear Receptor Subfamily 4, Group A, Member 1 metabolism, RNA Interference
- Abstract
Protein-protein interaction (PPI) studies are gaining momentum these days due to the plethora of various high-throughput experimental methods available for detecting PPIs. Proteins create complexes and networks by functioning in harmony with other proteins and here in silico network biology hold the promise to reveal new functionality of genes as it is very difficult and laborious to carry out experimental high-throughput genetic screens in living organisms. We demonstrate this approach by computationally screening C. elegans conserved homologs of already reported human tumor suppressor and aging associated genes. We select by this nhr-6, vab-3 and gst-23 as predicted longevity genes for RNAi screen. The RNAi results demonstrated the pro-longevity effect of these genes. Nuclear hormone receptor nhr-6 RNAi inhibition resulted in a C. elegans phenotype of 23.46% lifespan reduction. Moreover, we show that nhr-6 regulates oxidative stress resistance in worms and does not affect the feeding behavior of worms. These findings imply the potential of nhr-6 as a common therapeutic target for aging and cancer ailments, stressing the power of in silico PPI network analysis coupled with RNAi screens to describe gene function.
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- 2019
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12. Age-induced diminution of free radicals by Boeravinone B in Caenorhabditis elegans.
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Rathor L and Pandey R
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- Animals, Antioxidants pharmacology, Caenorhabditis elegans Proteins genetics, Caenorhabditis elegans Proteins metabolism, Cytochromes b genetics, Gene Expression Regulation, Glutathione Transferase metabolism, Heat-Shock Proteins metabolism, Hot Temperature, NADH Dehydrogenase genetics, Oxidative Stress drug effects, Signal Transduction, Stress, Physiological drug effects, Superoxide Dismutase metabolism, Caenorhabditis elegans physiology, Flavonoids pharmacology, Free Radicals metabolism, Longevity, Reactive Oxygen Species metabolism
- Abstract
Oxidative damage is accrual of molecular deterioration from reactive oxygen species (ROS) while decrease in generation of ROS is related with free radical scavenging enzymes. Boerhaavia diffusa L. (Nyctaginaceae) derived novel molecule Boeravinone B (BOB) possesses a variety of pharmacological activities, yet their anti-aging potential has not been explored. The aim of the present study was to elucidate the mechanism of BOB mediated oxidative stress resistance and lifespan extension in Caenorhabditis elegans. The results showed that the BOB significantly extends the lifespan of C. elegans with its anti-oxidative potential via reducing accumulation of reactive oxygen species (ROS). BOB was found to recover the shortened lifespan of oxidative stress prone mutants mev-1 and gas-1 (14.75 and 16.11%, respectively). Additionally, this finding supported by the reduced ROS levels seen in BOB treated worms. Further, the effective concentration of BOB (25 μM) significantly enhanced the expressions of target genes such as superoxide dismutase (SOD-3), glutathione-S-transferase (GST-4) and heat shock protein (HSP-16.2) fused to green fluorescent protein (GFP), and it does so by modulating the stress-related signaling pathways (SEK-1) and transcription factors (SKN-1/Nrf and DAF-16/Foxo). Moreover, BOB exposure (25 μM) caused significant changes of age-dependent biomarkers such as pharyngeal pumping, body bend, locomotor activity and lipofuscin accumulation were also showed that BOB retards the aging. Overall, the findings highlight the antioxidant supplement triggering pharmaceutical potential of BOB which may serve as a new future perspective for healthy aging or delayed onset of oxidative related diseases., (Copyright © 2018 Elsevier Inc. All rights reserved.)
- Published
- 2018
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13. Withanolide A extends the lifespan in human EGFR-driven cancerous Caenorhabditis elegans.
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Akhoon BA, Rathor L, and Pandey R
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- Adipose Tissue metabolism, Animals, Caenorhabditis elegans, ErbB Receptors pharmacology, Oxidative Stress drug effects, Phytotherapy methods, Plant Extracts pharmacology, Up-Regulation, Withania, Longevity drug effects, Neoplasms physiopathology, Withanolides pharmacology
- Abstract
The conserved EGFR pathway is linked with multiple cancers in humans including breast, ovarian, and lung carcinoma. Withanolide A, one of the major withanolidal active compounds isolated from the Withania somnifera, extends lifespan and ameliorates stress resistance in wild-type C. elegans by targeting the Insulin/IGF-1 signaling pathway. Up-regulation of IGF1 can transactivate EGFR which inturn reduces longevity and promotes tumor development in an organism. We examined the effects of Withanolide A on the lifespan of a human EGFR-driven C. elegans transgenic model exhibiting the multivulva (Muv) phenotype. The results showed that WA extends the lifespan of both wild human EGFR-driven C. elegans model (human wild-type tyrosine kinase) as well as models bearing single (L858R), and double mutations (T790M-L858R). The lifespan extension observed in these transgenic strains was 20.35, 24.21 and 21.27%, respectively. Moreover, the reduced fat levels were noticed in both wild-type N2 worms and transgenic strains. These observations support the heathspan promoting effect of WA as lipid-rich diet has been reported to promote tumor development. In view of the fact that most of the well known FDA approved drugs such as gefitinib fail to inhibit the EGFR-associated cancers because of these mutations, the present findings show the potential of Withanolide A as a foreseen future nutraceutical to improve the average survival of cancer patients., (Copyright © 2018 Elsevier Inc. All rights reserved.)
- Published
- 2018
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14. An antidiabetic polyherbal phytomedicine confers stress resistance and extends lifespan in Caenorhabditis elegans.
- Author
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Rathor L, Pant A, Awasthi H, Mani D, and Pandey R
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- Animals, Animals, Genetically Modified, Caenorhabditis elegans Proteins metabolism, Dose-Response Relationship, Drug, Drug Combinations, Medicine, Ayurvedic, Oxidative Stress drug effects, Reactive Oxygen Species metabolism, Survival Rate, Treatment Outcome, Caenorhabditis elegans drug effects, Caenorhabditis elegans physiology, Longevity drug effects, Longevity physiology, Oxidative Stress physiology, Plant Extracts administration & dosage
- Abstract
An Ayurvedic polyherbal extract (PHE) comprising six herbs viz. Berberis aristata, Cyperus rotundus, Cedrus deodara, Emblica officinalis, Terminalia chebula and Terminalia bellirica is mentioned as an effective anti-hyperglycemic agent in 'Charaka Samhita', the classical text of Ayurveda. Previously, antidiabetic drug metformin was found to elicit antiaging effects and PHE was also found to exhibit antidiabetic effects in humans. Therefore, we screened it for its in vivo antioxidant antiaging effect on stress and lifespan using human homologous Caenorhabditis elegans model system. The effect on aging is evaluated by studying effect of PHE on mean survival in worms. The stress modulatory potential was assessed by quantification of intracellular ROS level, autofluorescent age pigment lipofuscin, oxidative and thermal stress assays. Additionally, stress response was quantified using gene reporter assays. The 0.01 µg/ml dose of PHE was able to enhance mean lifespan by 16.09% (P < 0.0001) in C. elegans. Furthermore, PHE treated worms demonstrated oxidative stress resistance in both wild type and stress hypersensitive mev-1 mutant along with upregulation of stress response genes sod-3 and gst-4. The delayed aging under stress can be attributed to its direct reactive oxygen species-scavenging activity and regulation of some age associated genes like daf-2, daf-16, skn-1, sod-3 and gst-4 in wild-type worms. Additonally, PHE delayed age related paralysis phenotype in CL4176 transgenic worms. Altogether, our results suggest PHE significantly improves the oxidative stress and life span in C. elegans. Overall the present study suggests this polyherbal formulation might play important role in regultaing aging and related complications like diabetes.
- Published
- 2017
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15. Folic acid supplementation at lower doses increases oxidative stress resistance and longevity in Caenorhabditis elegans.
- Author
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Rathor L, Akhoon BA, Pandey S, Srivastava S, and Pandey R
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- Animals, Caenorhabditis elegans, Caenorhabditis elegans Proteins metabolism, DNA-Binding Proteins metabolism, Forkhead Transcription Factors metabolism, Glutathione Transferase metabolism, Insulin metabolism, Insulin-Like Growth Factor I metabolism, Microscopy, Fluorescence, Models, Animal, Oxidation-Reduction, Real-Time Polymerase Chain Reaction, Signal Transduction, Sirtuins metabolism, Superoxide Dismutase metabolism, TOR Serine-Threonine Kinases metabolism, Transcription Factors metabolism, Aging drug effects, Folic Acid administration & dosage, Folic Acid pharmacology, Longevity drug effects, Oxidative Stress drug effects
- Abstract
Folic acid (FA) is an essential nutrient that the human body needs but cannot be synthesized on its own. Fortified foods and plant food sources such as green leafy vegetables, beans, fruits, and juices are good sources of FA to meet the daily requirements of the body. The aim was to evaluate the effect of dietary FA levels on the longevity of well-known experimental aging model Caenorhabditis elegans. Here, we show for first time that FA extends organism life span and causes a delay in aging. We observed that FA inhibits mechanistic target of rapamycin (mTOR) and insulin/insulin growth factor 1 (IGF-1) signaling pathways to control both oxidative stress levels and life span. The expression levels of stress- and life span-relevant gerontogenes, viz. daf-16, skn-1, and sir. 2.1, and oxidative enzymes, such as glutathione S-transferase 4 (GST-4) and superoxide dismutase 3 (SOD-3), were also found to be highly enhanced to attenuate the intracellular reactive oxygen species (ROS) damage and to delay the aging process. Our study promotes the use of FA to mitigate abiotic stresses and other aging-related ailments., Competing Interests: The authors declare that they have no competing interests.
- Published
- 2015
- Full Text
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