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Gabrawy MM, Westbrook R, King A, Khosravian N, Ochaney N, DeCarvalho T, Wang Q, Yu Y, Huang Q, Said A, Abadir M, Zhang C, Khare P, Fairman JE, Le A, Milne GL, Vonhoff FJ, Walston JD, Abadir PM. Dual treatment with kynurenine pathway inhibitors and NAD + precursors synergistically extends life span in Drosophila. Aging Cell 2024; 23:e14102. [PMID: 38481042 PMCID: PMC11019140 DOI: 10.1111/acel.14102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/19/2024] [Accepted: 01/24/2024] [Indexed: 04/17/2024] Open
Abstract
Tryptophan catabolism is highly conserved and generates important bioactive metabolites, including kynurenines, and in some animals, NAD+. Aging and inflammation are associated with increased levels of kynurenine pathway (KP) metabolites and depleted NAD+, factors which are implicated as contributors to frailty and morbidity. Contrastingly, KP suppression and NAD+ supplementation are associated with increased life span in some animals. Here, we used DGRP_229 Drosophila to elucidate the effects of KP elevation, KP suppression, and NAD+ supplementation on physical performance and survivorship. Flies were chronically fed kynurenines, KP inhibitors, NAD+ precursors, or a combination of KP inhibitors with NAD+ precursors. Flies with elevated kynurenines had reduced climbing speed, endurance, and life span. Treatment with a combination of KP inhibitors and NAD+ precursors preserved physical function and synergistically increased maximum life span. We conclude that KP flux can regulate health span and life span in Drosophila and that targeting KP and NAD+ metabolism can synergistically increase life span.
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Affiliation(s)
- Mariann M. Gabrawy
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Reyhan Westbrook
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Austin King
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
- Department of Biological SciencesUniversity of Maryland, Baltimore CountyBaltimoreMarylandUSA
| | - Nick Khosravian
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
- Department of Biological SciencesUniversity of Maryland, Baltimore CountyBaltimoreMarylandUSA
| | - Neeraj Ochaney
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
- Department of Biological SciencesUniversity of Maryland, Baltimore CountyBaltimoreMarylandUSA
| | - Tagide DeCarvalho
- Department of Biological SciencesUniversity of Maryland, Baltimore CountyBaltimoreMarylandUSA
| | - Qinchuan Wang
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Yuqiong Yu
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Qiao Huang
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Adam Said
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
- Emory UniversityAtlantaGeorgiaUSA
| | - Michael Abadir
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
- University of Maryland, College ParkCollege ParkMarylandUSA
| | | | | | - Jennifer E. Fairman
- Department of Arts as Applied to MedicineJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Anne Le
- Gigantest Inc.BaltimoreMarylandUSA
| | - Ginger L. Milne
- Vanderbilt UniversityVanderbilt Brain Institute, Neurochemistry CoreNashvilleTennesseeUSA
| | - Fernando J. Vonhoff
- Department of Biological SciencesUniversity of Maryland, Baltimore CountyBaltimoreMarylandUSA
| | - Jeremy D. Walston
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Peter M. Abadir
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
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Bai X, Yu K, Xiong S, Chen J, Yang Y, Ye X, Yao H, Wang F, Fang Q, Song Q, Ye G. CRISPR/Cas9-mediated mutagenesis of the white gene in an ectoparasitic wasp, Habrobracon hebetor. PEST MANAGEMENT SCIENCE 2024; 80:1219-1227. [PMID: 37899674 DOI: 10.1002/ps.7851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 09/25/2023] [Accepted: 10/30/2023] [Indexed: 10/31/2023]
Abstract
BACKGROUND The ectoparasitic wasp Habrobracon hebetor (Hymenoptera, Braconidae) can parasitize various species of lepidopteran pests. To maximize its potential for biological control, it is necessary to investigate its gene function through genome engineering. RESULTS To test the effectiveness of genome engineering system in H. hebetor, we injected the mixture of clustered regularly interspaced short palindromic repeats (CRISPR) -associated (Cas) 9 protein and single guide RNA(s) targeting gene white into embryos. The resulting mutants display a phenotype of eye pigment loss. The phenotype was caused by small indel and is heritable. Then, we compared some biological parameters between wildtype and mutant, and found there were no significant differences in other parameters except for the offspring female rate and adult longevity. In addition, cocoons could be used to extract genomic DNA for genotype during the gene editing process without causing unnecessary harm to H. hebetor. CONCLUSION Our results demonstrate that the CRISPR/Cas9 system can be used for H. hebetor genome editing and it does not adversely affect biological parameters of the parasitoid wasps. We also provide a feasible non-invasive genotype detection method using genomic DNA extracted from cocoons. Our study introduces a novel tool and method for studying gene function in H. hebetor, and may contribute to better application of H. hebetor in biocontrol. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Xue Bai
- State Key Laboratory of Rice Biology and Breeding, Ministry of Agricultural and Rural Affairs Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Kaili Yu
- State Key Laboratory of Rice Biology and Breeding, Ministry of Agricultural and Rural Affairs Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Shijiao Xiong
- State Key Laboratory of Rice Biology and Breeding, Ministry of Agricultural and Rural Affairs Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Jin Chen
- State Key Laboratory of Rice Biology and Breeding, Ministry of Agricultural and Rural Affairs Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Yi Yang
- State Key Laboratory of Rice Biology and Breeding, Ministry of Agricultural and Rural Affairs Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Xinhai Ye
- State Key Laboratory of Rice Biology and Breeding, Ministry of Agricultural and Rural Affairs Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Hongwei Yao
- State Key Laboratory of Rice Biology and Breeding, Ministry of Agricultural and Rural Affairs Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Fang Wang
- State Key Laboratory of Rice Biology and Breeding, Ministry of Agricultural and Rural Affairs Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Qi Fang
- State Key Laboratory of Rice Biology and Breeding, Ministry of Agricultural and Rural Affairs Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Qisheng Song
- Division of Plant Science and Technology, College of Agriculture, Food and Natural Resources, University of Missouri, Columbia, MO, USA
| | - Gongyin Ye
- State Key Laboratory of Rice Biology and Breeding, Ministry of Agricultural and Rural Affairs Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
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3
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Li F, Wu C, Wang G. Targeting NAD Metabolism for the Therapy of Age-Related Neurodegenerative Diseases. Neurosci Bull 2024; 40:218-240. [PMID: 37253984 PMCID: PMC10838897 DOI: 10.1007/s12264-023-01072-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 04/10/2023] [Indexed: 06/01/2023] Open
Abstract
As the aging population continues to grow rapidly, age-related diseases are becoming an increasing burden on the healthcare system and a major concern for the well-being of elderly individuals. While aging is an inevitable process for all humans, it can be slowed down and age-related diseases can be treated or alleviated. Nicotinamide adenine dinucleotide (NAD) is a critical coenzyme or cofactor that plays a central role in metabolism and is involved in various cellular processes including the maintenance of metabolic homeostasis, post-translational protein modifications, DNA repair, and immune responses. As individuals age, their NAD levels decline, and this decrease has been suggested to be a contributing factor to the development of numerous age-related diseases, such as cancer, diabetes, cardiovascular diseases, and neurodegenerative diseases. In pursuit of healthy aging, researchers have investigated approaches to boost or maintain NAD levels. Here, we provide an overview of NAD metabolism and the role of NAD in age-related diseases and summarize recent progress in the development of strategies that target NAD metabolism for the treatment of age-related diseases, particularly neurodegenerative diseases.
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Affiliation(s)
- Feifei Li
- School of Pharmaceutical Sciences, Ministry of Education Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Tsinghua University, Beijing, 100084, China
| | - Chou Wu
- School of Pharmaceutical Sciences, Ministry of Education Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Tsinghua University, Beijing, 100084, China
- Tsinghua-Peking Joint Center for Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Gelin Wang
- School of Pharmaceutical Sciences, Ministry of Education Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Tsinghua University, Beijing, 100084, China.
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Dang H, Castro-Portuguez R, Espejo L, Backer G, Freitas S, Spence E, Meyers J, Shuck K, Gardea EA, Chang LM, Balsa J, Thorns N, Corban C, Liu T, Bean S, Sheehan S, Korstanje R, Sutphin GL. On the benefits of the tryptophan metabolite 3-hydroxyanthranilic acid in Caenorhabditis elegans and mouse aging. Nat Commun 2023; 14:8338. [PMID: 38097593 PMCID: PMC10721613 DOI: 10.1038/s41467-023-43527-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 11/13/2023] [Indexed: 12/17/2023] Open
Abstract
Tryptophan metabolism through the kynurenine pathway influences molecular processes critical to healthy aging including immune signaling, redox homeostasis, and energy production. Aberrant kynurenine metabolism occurs during normal aging and is implicated in many age-associated pathologies including chronic inflammation, atherosclerosis, neurodegeneration, and cancer. We and others previously identified three kynurenine pathway genes-tdo-2, kynu-1, and acsd-1-for which decreasing expression extends lifespan in invertebrates. Here we report that knockdown of haao-1, a fourth gene encoding the enzyme 3-hydroxyanthranilic acid (3HAA) dioxygenase (HAAO), extends lifespan by ~30% and delays age-associated health decline in Caenorhabditis elegans. Lifespan extension is mediated by increased physiological levels of the HAAO substrate 3HAA. 3HAA increases oxidative stress resistance and activates the Nrf2/SKN-1 oxidative stress response. In pilot studies, female Haao knockout mice or aging wild type male mice fed 3HAA supplemented diet were also long-lived. HAAO and 3HAA represent potential therapeutic targets for aging and age-associated disease.
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Affiliation(s)
- Hope Dang
- Molecular & Cellular Biology, University of Arizona, Tucson, AZ, USA
| | | | - Luis Espejo
- Molecular & Cellular Biology, University of Arizona, Tucson, AZ, USA
| | | | - Samuel Freitas
- Molecular & Cellular Biology, University of Arizona, Tucson, AZ, USA
| | - Erica Spence
- Molecular & Cellular Biology, University of Arizona, Tucson, AZ, USA
| | - Jeremy Meyers
- Molecular & Cellular Biology, University of Arizona, Tucson, AZ, USA
| | - Karissa Shuck
- Molecular & Cellular Biology, University of Arizona, Tucson, AZ, USA
| | - Emily A Gardea
- Molecular & Cellular Biology, University of Arizona, Tucson, AZ, USA
| | - Leah M Chang
- Molecular & Cellular Biology, University of Arizona, Tucson, AZ, USA
| | - Jonah Balsa
- Molecular & Cellular Biology, University of Arizona, Tucson, AZ, USA
| | - Niall Thorns
- Molecular & Cellular Biology, University of Arizona, Tucson, AZ, USA
| | | | - Teresa Liu
- The Jackson Laboratory, Bar Harbor, ME, USA
| | | | | | | | - George L Sutphin
- Molecular & Cellular Biology, University of Arizona, Tucson, AZ, USA.
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5
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Sultana S, Elengickal A, Bensreti H, de Chantemèle EB, McGee-Lawrence ME, Hamrick MW. The kynurenine pathway in HIV, frailty and inflammaging. Front Immunol 2023; 14:1244622. [PMID: 37744363 PMCID: PMC10514395 DOI: 10.3389/fimmu.2023.1244622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 08/25/2023] [Indexed: 09/26/2023] Open
Abstract
Kynurenine (Kyn) is a circulating tryptophan (Trp) catabolite generated by enzymes including IDO1 that are induced by inflammatory cytokines such as interferon-gamma. Kyn levels in circulation increase with age and Kyn is implicated in several age-related disorders including neurodegeneration, osteoporosis, and sarcopenia. Importantly, Kyn increases with progressive disease in HIV patients, and antiretroviral therapy does not normalize IDO1 activity in these subjects. Kyn is now recognized as an endogenous agonist of the aryl hydrocarbon receptor, and AhR activation itself has been found to induce muscle atrophy, increase the activity of bone-resorbing osteoclasts, decrease matrix formation by osteoblasts, and lead to senescence of bone marrow stem cells. Several IDO1 and AhR inhibitors are now in clinical trials as potential cancer therapies. We propose that some of these drugs may be repurposed to improve musculoskeletal health in older adults living with HIV.
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Affiliation(s)
| | | | | | | | | | - Mark W. Hamrick
- Medical College of Georgia, Augusta University, Augusta, GA, United States
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6
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Aleya A, Mihok E, Pecsenye B, Jolji M, Kertész A, Bársony P, Vígh S, Cziaky Z, Máthé AB, Burtescu RF, Oláh NK, Neamțu AA, Turcuș V, Máthé E. Phytoconstituent Profiles Associated with Relevant Antioxidant Potential and Variable Nutritive Effects of the Olive, Sweet Almond, and Black Mulberry Gemmotherapy Extracts. Antioxidants (Basel) 2023; 12:1717. [PMID: 37760021 PMCID: PMC10525884 DOI: 10.3390/antiox12091717] [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: 07/15/2023] [Revised: 08/15/2023] [Accepted: 08/23/2023] [Indexed: 09/29/2023] Open
Abstract
The extracts of whole plants or specific organs from different plant species are gaining increasing attention for their phytotherapy applications. Accordingly, we prepared standardized gemmotherapy extracts (GTEs) from young shoots/buds of olive (Olea europaea), sweet almond (Prunus amygdalus), and black mulberry (Morus nigra), and analyzed the corresponding phytonutrient profiles. We identified 42, 103, and 109 phytonutrients in the olive, almond, and black mulberry GTEs, respectively, containing amino acids, vitamins, polyphenols, flavonoids, coumarins, alkaloids, iridoids, carboxylic acids, lignans, terpenoids, and others. In order to assess the physiological effects generated by the GTEs, we developed a translational nutrition model based on Drosophila melanogaster and Cyprinus carpio. The results indicate that GTEs could influence, to a variable extent, viability and ATP synthesis, even though both are dependent on the specific carbohydrate load of the applied diet and the amino acid and polyphenol pools provided by the GTEs. It seems, therefore, likely that the complex chemical composition of the GTEs offers nutritional properties that cannot be separated from the health-promoting mechanisms that ultimately increase viability and survival. Such an approach sets the paves the way for the nutritional genomic descriptions regarding GTE-associated health-promoting effects.
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Affiliation(s)
- Amina Aleya
- Doctoral School of Animal Science, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Böszörményi Str. 128, 4032 Debrecen, Hungary; (A.A.); (E.M.); (A.K.)
| | - Emőke Mihok
- Doctoral School of Animal Science, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Böszörményi Str. 128, 4032 Debrecen, Hungary; (A.A.); (E.M.); (A.K.)
| | - Bence Pecsenye
- Doctoral School of Nutrition and Food Science, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Böszörményi Str. 128, 4032 Debrecen, Hungary (M.J.)
- Institute of Nutrition Science, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Böszörményi Str. 128, 4032 Debrecen, Hungary;
| | - Maria Jolji
- Doctoral School of Nutrition and Food Science, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Böszörményi Str. 128, 4032 Debrecen, Hungary (M.J.)
| | - Attila Kertész
- Doctoral School of Animal Science, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Böszörményi Str. 128, 4032 Debrecen, Hungary; (A.A.); (E.M.); (A.K.)
| | - Péter Bársony
- Institute of Animal Science, Biotechnology and Nature Conservation, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Böszörményi Str. 128, 4032 Debrecen, Hungary;
| | - Szabolcs Vígh
- Agricultural and Molecular Research Institute, University of Nyíregyháza, Sóstói Str. 31, 4400 Nyíregyháza, Hungary; (S.V.); (Z.C.)
| | - Zoltán Cziaky
- Agricultural and Molecular Research Institute, University of Nyíregyháza, Sóstói Str. 31, 4400 Nyíregyháza, Hungary; (S.V.); (Z.C.)
| | - Anna-Beáta Máthé
- Doctoral School of Neuroscience, Faculty of Medicine, University of Debrecen, Nagyerdei Str. 94, 4032 Debrecen, Hungary;
| | | | - Neli-Kinga Oláh
- PlantExtrakt Ltd., 407059 Cluj, Romania; (R.F.B.)
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Vasile Goldiș Western University from Arad, L.Rebreanu Str. 86, 310414 Arad, Romania
| | - Andreea-Adriana Neamțu
- Department of Life Sciences, Faculty of Medicine, Vasile Goldiș Western University from Arad, L.Rebreanu Str. 86, 310414 Arad, Romania
| | - Violeta Turcuș
- Department of Life Sciences, Faculty of Medicine, Vasile Goldiș Western University from Arad, L.Rebreanu Str. 86, 310414 Arad, Romania
- CE-MONT Mountain Economy Center, Costin C. Kirițescu National Institute of Economic Research, Romanian Academy, Petreni Str. 49, 725700 Suceava, Romania
| | - Endre Máthé
- Institute of Nutrition Science, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Böszörményi Str. 128, 4032 Debrecen, Hungary;
- Department of Life Sciences, Faculty of Medicine, Vasile Goldiș Western University from Arad, L.Rebreanu Str. 86, 310414 Arad, Romania
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Oxenkrug G, Navrotska V. Extension of life span by down-regulation of enzymes catalyzing tryptophan conversion into kynurenine: Possible implications for mechanisms of aging. Exp Biol Med (Maywood) 2023; 248:573-577. [PMID: 37300401 PMCID: PMC10350802 DOI: 10.1177/15353702231179411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023] Open
Abstract
The end products of catabolism of tryptophan (Trp), an essential amino acid, are known to affect mechanism(s) of aging, a neurodegenerative condition. This review focuses on the possible role of the initial step of Trp catabolism, kynurenine (Kyn) formation from Trp, in aging mechanism(s). Rate-limiting enzymes of Trp conversion into Kyn are tryptophan 2,3-dioxygenase 2 (TDO) or indoleamine 2,3-dioxygenase (IDO). Aging is associated with up-regulated production of cortisol, an activator of TDO, and pro-inflammatory cytokines, inducers of IDO. The other rate-limiting enzyme of Kyn formation from Trp is ATP-binding cassette (ABC) transporter that regulates Trp availability as a substrate for TDO. Inhibitors of TDO (alpha-methyl tryptophan) and ABC transporter (5-methyltryptophan) extended life span of wild-type Drosophila. Life span prolongation was observed in TDO knockdown of Caenorhabditis elegans and in TDO or ABC transporter-deficient Drosophila mutants. Down-regulation of enzymes catalyzing Kyn conversion into kynurenic acid (KYNA) and 3-hydroxykynurenine decreases life span. Considering that down-regulation of Methuselah (MTH) gene prolonged life span, aging-accelerating effect of KYNA, a GPR35/MTH agonist, might depend on MTH gene activation. Mice treated with TDO inhibitor, benserazide, an ingredient of anti-Parkinson medication carbidopa, and TDO-deficient Drosophila mutants were resistant to inducement of aging-associated Metabolic Syndrome by high-sugar or high-fat diets. Up-regulation of Kyn formation was associated with accelerated aging and increased mortality in human subjects. Trp-Kyn pathway is evolutionary conserved (from yeasts, through insects, worms, vertebrates to humans). Further studies might explore possible antiaging effect of down-regulation of Kyn formation from Trp by dietary, pharmacological, and genetic interventions.
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Ala M, Eftekhar SP. The Footprint of Kynurenine Pathway in Cardiovascular Diseases. Int J Tryptophan Res 2022; 15:11786469221096643. [PMID: 35784899 PMCID: PMC9248048 DOI: 10.1177/11786469221096643] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 03/28/2022] [Indexed: 12/30/2022] Open
Abstract
Kynurenine pathway is the main route of tryptophan metabolism and produces several metabolites with various biologic properties. It has been uncovered that several cardiovascular diseases are associated with the overactivation of kynurenine pathway and kynurenine and its metabolites have diagnostic and prognostic value in cardiovascular diseases. Furthermore, it was found that several kynurenine metabolites can differently affect cardiovascular health. For instance, preclinical studies have shown that kynurenine, xanthurenic acid and cis-WOOH decrease blood pressure; kynurenine and 3-hydroxyanthranilic acid prevent atherosclerosis; kynurenic acid supplementation and kynurenine 3-monooxygenase (KMO) inhibition improve the outcome of stroke. Indoleamine 2,3-dioxygenase (IDO) overactivity and increased kynurenine levels improve cardiac and vascular transplantation outcomes, whereas exacerbating the outcome of myocardial ischemia, post-ischemic myocardial remodeling, and abdominal aorta aneurysm. IDO inhibition and KMO inhibition are also protective against viral myocarditis. In addition, dysregulation of kynurenine pathway is observed in several conditions such as senescence, depression, diabetes, chronic kidney disease (CKD), cirrhosis, and cancer closely connected to cardiovascular dysfunction. It is worth defining the exact effect of each metabolite of kynurenine pathway on cardiovascular health. This narrative review is the first review that separately discusses the involvement of kynurenine pathway in different cardiovascular diseases and dissects the underlying molecular mechanisms.
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Affiliation(s)
- Moein Ala
- School of Medicine, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Seyed Parsa Eftekhar
- Student Research Committee, Health Research Center, Babol University of Medical Sciences, Babol, Iran
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9
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Abstract
SignificanceZinc deficiency in the human population, a major public health concern, can also be a consequence of nutritional deficiency in protein uptake. The discovery that tryptophan metabolites 3-hydroxykynurenine and xanthurenic acid are major zinc-binding ligands in insect cells establishes the kynurenine pathway as a regulator of systemic zinc homeostasis. Many biological processes influenced by zinc and the kynurenine pathway, including the regulation of innate and acquired immune responses to viral infections, have not been studied in light of the direct molecular links revealed in this study.
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Bottino-Rojas V, Ferreira-Almeida I, Nunes RD, Feng X, Pham TB, Kelsey A, Carballar-Lejarazú R, Gantz V, Oliveira PL, James AA. Beyond the eye: Kynurenine pathway impairment causes midgut homeostasis dysfunction and survival and reproductive costs in blood-feeding mosquitoes. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2022; 142:103720. [PMID: 34999199 PMCID: PMC11055609 DOI: 10.1016/j.ibmb.2022.103720] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/03/2022] [Accepted: 01/04/2022] [Indexed: 06/14/2023]
Abstract
Insect ommochrome biosynthesis pathways metabolize tryptophan to generate eye-color pigments and wild-type alleles of pathway genes are useful phenotypic markers in transgenesis studies. Pleiotropic effects of mutations in some genes exert a load on both survival and reproductive success in blood-feeding species. Here, we investigated the challenges imposed on mosquitoes by the increase of tryptophan metabolites resulting from blood meal digestion and the impact of disruptions of the ommochrome biosynthesis pathway. Female mosquitoes with spontaneous and induced mutations in the orthologs of the genes encoding kynurenine hydroxylase in Aedes aegypti, Anopheles stephensi and Culex quinquefasciatus exhibited impaired survival and reproductive phenotypes that varied in type and severity among the species. A compromised midgut permeability barrier function was also observed in An. stephensi. Surprisingly, mutant mosquitoes displayed an increase in microbiota compared to controls that was not accompanied by a general induction of immune genes. Antibiotic treatment rescued some deleterious traits implicating a role for the kynurenine pathway (KP) in midgut homeostasis. Supplemental xanthurenic acid, a KP end-product, rescued lethality and limited microbiota proliferation in Ae. aegypti. These data implicate the KP in the regulation of the host/microbiota interface. These pleiotropic effects on mosquito physiology are important in the development of genetic strategies targeting vector mosquitoes.
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Affiliation(s)
- Vanessa Bottino-Rojas
- Department of Microbiology & Molecular Genetics, University of California, Irvine, CA, USA
| | - Igor Ferreira-Almeida
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Rodrigo D Nunes
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Xuechun Feng
- Section of Cell and Developmental Biology, University of California San Diego, La Jolla, CA, USA
| | - Thai Binh Pham
- Department of Microbiology & Molecular Genetics, University of California, Irvine, CA, USA
| | - Adam Kelsey
- Department of Microbiology & Molecular Genetics, University of California, Irvine, CA, USA
| | | | - Valentino Gantz
- Section of Cell and Developmental Biology, University of California San Diego, La Jolla, CA, USA
| | - Pedro L Oliveira
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil; Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Rio de Janeiro, RJ, Brazil.
| | - Anthony A James
- Department of Microbiology & Molecular Genetics, University of California, Irvine, CA, USA; Department of Molecular Biology & Biochemistry, University of California, Irvine, CA, USA.
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11
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Zhao X, Golic FT, Harrison BR, Manoj M, Hoffman EV, Simon N, Johnson R, MacCoss MJ, McIntyre LM, Promislow DEL. The metabolome as a biomarker of aging in Drosophila melanogaster. Aging Cell 2022; 21:e13548. [PMID: 35019203 PMCID: PMC8844127 DOI: 10.1111/acel.13548] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 11/12/2021] [Indexed: 12/15/2022] Open
Abstract
Many biomarkers have been shown to be associated not only with chronological age but also with functional measures of biological age. In human populations, it is difficult to show whether variation in biological age is truly predictive of life expectancy, as such research would require longitudinal studies over many years, or even decades. We followed adult cohorts of 20 Drosophila Genetic Reference Panel (DGRP) strains chosen to represent the breadth of lifespan variation, obtain estimates of lifespan, baseline mortality, and rate of aging, and associate these parameters with age‐specific functional traits including fecundity and climbing activity and with age‐specific targeted metabolomic profiles. We show that activity levels and metabolome‐wide profiles are strongly associated with age, that numerous individual metabolites show a strong association with lifespan, and that the metabolome provides a biological clock that predicts not only sample age but also future mortality rates and lifespan. This study with 20 genotypes and 87 metabolites, while relatively small in scope, establishes strong proof of principle for the fly as a powerful experimental model to test hypotheses about biomarkers and aging and provides further evidence for the potential value of metabolomic profiles as biomarkers of aging.
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Affiliation(s)
- Xiaqing Zhao
- Department of Lab Medicine and Pathology University of Washington School of Medicine Seattle US
| | - Forrest T. Golic
- Department of Lab Medicine and Pathology University of Washington School of Medicine Seattle US
| | - Benjamin R. Harrison
- Department of Lab Medicine and Pathology University of Washington School of Medicine Seattle US
| | - Meghna Manoj
- Department of Lab Medicine and Pathology University of Washington School of Medicine Seattle US
| | - Elise V. Hoffman
- Department of Lab Medicine and Pathology University of Washington School of Medicine Seattle US
| | - Neta Simon
- Department of Lab Medicine and Pathology University of Washington School of Medicine Seattle US
| | - Richard Johnson
- Department of Genome Sciences University of Washington School of Medicine Seattle US
| | - Michael J. MacCoss
- Department of Genome Sciences University of Washington School of Medicine Seattle US
| | - Lauren M. McIntyre
- Genetics Institute University of Florida Gainesville USA
- Department of Molecular Genetics and Microbiology University of Florida Gainesville USA
| | - Daniel E. L. Promislow
- Department of Lab Medicine and Pathology University of Washington School of Medicine Seattle US
- Department of Biology University of Washington Seattle US
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12
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The effects of high-monosaccharide diets on development and biochemical composition of white-eyed mutant strain of house cricket (Acheta domesticus). Sci Rep 2021; 11:21147. [PMID: 34707140 PMCID: PMC8551166 DOI: 10.1038/s41598-021-00393-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 10/05/2021] [Indexed: 11/22/2022] Open
Abstract
Tryptophan (TRP) is one of the essential amino acids in the animal body. Its exogenicity and low concentrations mean that it can be regarded as one of the key regulatory molecules at the cellular as well as physiological level. It has been shown to have a number of essential functions, such as in the production of other biologically active molecules. The main objective of this project was to investigate the effects of a high monosaccharide diet (HMD) on a hemimetabolic insect-house cricket (Acheta domesticus) and a mutant strain with impaired visual pigment synthesis (closely related to the tryptophan and kynurenine (KYN) metabolic pathway)-white eye. This study was aimed at determining the effects of glucose and fructose on cricket development and biochemical composition. A parallel goal was to compare the response of both cricket strains to HMD. ELISA assays indicated dysfunction of the TRP-KYN pathway in white strain insects and an elevated KYN/TRP ratio. Biochemical analyses demonstrated the effects of HMD mainly on fat and glycogen content. A decrease in food intake was also observed in the groups on HMD. However, no changes in imago body weight and water content were observed. The results of the study indicate a stronger response of the white strain to HMD compared to the wild-type strain. At the same time, a stronger detrimental effect of fructose than of glucose was apparent. Sex was found to be a modulating factor in the response to HMD.
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13
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Landis GN, Hilsabeck TAU, Bell HS, Ronnen-Oron T, Wang L, Doherty DV, Tejawinata FI, Erickson K, Vu W, Promislow DEL, Kapahi P, Tower J. Mifepristone Increases Life Span of Virgin Female Drosophila on Regular and High-fat Diet Without Reducing Food Intake. Front Genet 2021; 12:751647. [PMID: 34659367 PMCID: PMC8511958 DOI: 10.3389/fgene.2021.751647] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 09/13/2021] [Indexed: 12/14/2022] Open
Abstract
Background: The synthetic steroid mifepristone is reported to have anti-obesity and anti-diabetic effects in mammals on normal and high-fat diets (HFD). We previously reported that mifepristone blocks the negative effect on life span caused by mating in female Drosophila melanogaster. Methods: Here we asked if mifepristone could protect virgin females from the life span-shortening effect of HFD. Mifepristone was assayed for effects on life span in virgin females, in repeated assays, on regular media and on media supplemented with coconut oil (HFD). The excrement quantification (EX-Q) assay was used to measure food intake of the flies after 12 days mifepristone treatment. In addition, experiments were conducted to compare the effects of mifepristone in virgin and mated females, and to identify candidate mifepristone targets and mechanisms. Results: Mifepristone increased life span of virgin females on regular media, as well as on media supplemented with either 2.5 or 5% coconut oil. Food intake was not reduced in any assay, and was significantly increased by mifepristone in half of the assays. To ask if mifepristone might rescue virgin females from all life span-shortening stresses, the oxidative stressor paraquat was tested, and mifepristone produced little to no rescue. Analysis of extant metabolomics and transcriptomics data suggested similarities between effects of mifepristone in virgin and mated females, including reduced tryptophan breakdown and similarities to dietary restriction. Bioinformatics analysis identified candidate mifepristone targets, including transcription factors Paired and Extra-extra. In addition to shortening life span, mating also causes midgut hypertrophy and activation of the lipid metabolism regulatory factor SREBP. Mifepristone blocked the increase in midgut size caused by mating, but did not detectably affect midgut size in virgins. Finally, mating increased activity of a SREBP reporter in abdominal tissues, as expected, but reporter activity was not detectably reduced by mifepristone in either mated or virgin females. Conclusion: Mifepristone increases life span of virgin females on regular and HFD without reducing food intake. Metabolomics and transcriptomics analyses suggest some similar effects of mifepristone between virgin and mated females, however reduced midgut size was observed only in mated females. The results are discussed regarding possible mifepristone mechanisms and targets.
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Affiliation(s)
- Gary N. Landis
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, CA, United States
| | - Tyler A. U. Hilsabeck
- Buck Institute for Research on Aging, Novato, CA, United States
- Davis School of Gerontology, University of Southern California, University Park, Los Angeles, CA, United States
| | - Hans S. Bell
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, CA, United States
| | - Tal Ronnen-Oron
- Buck Institute for Research on Aging, Novato, CA, United States
| | - Lu Wang
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA, United States
| | - Devon V. Doherty
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, CA, United States
| | - Felicia I. Tejawinata
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, CA, United States
| | - Katherine Erickson
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, CA, United States
| | - William Vu
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, CA, United States
| | - Daniel E. L. Promislow
- Department of Biology, University of Washington, Seattle, WA, United States
- Department of Laboratory Medicine and Pathology, University of Washington School of Medicine, Seattle, WA, United States
| | - Pankaj Kapahi
- Buck Institute for Research on Aging, Novato, CA, United States
| | - John Tower
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, CA, United States
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14
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Nazario-Yepiz NO, Fernández Sobaberas J, Lyman R, Campbell MR, Shankar V, Anholt RRH, Mackay TFC. Physiological and metabolomic consequences of reduced expression of the Drosophila brummer triglyceride Lipase. PLoS One 2021; 16:e0255198. [PMID: 34547020 PMCID: PMC8454933 DOI: 10.1371/journal.pone.0255198] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 09/07/2021] [Indexed: 11/18/2022] Open
Abstract
Disruption of lipolysis has widespread effects on intermediary metabolism and organismal phenotypes. Defects in lipolysis can be modeled in Drosophila melanogaster through genetic manipulations of brummer (bmm), which encodes a triglyceride lipase orthologous to mammalian Adipose Triglyceride Lipase. RNAi-mediated knock-down of bmm in all tissues or metabolic specific tissues results in reduced locomotor activity, altered sleep patterns and reduced lifespan. Metabolomic analysis on flies in which bmm is downregulated reveals a marked reduction in medium chain fatty acids, long chain saturated fatty acids and long chain monounsaturated and polyunsaturated fatty acids, and an increase in diacylglycerol levels. Elevated carbohydrate metabolites and tricarboxylic acid intermediates indicate that impairment of fatty acid mobilization as an energy source may result in upregulation of compensatory carbohydrate catabolism. bmm downregulation also results in elevated levels of serotonin and dopamine neurotransmitters, possibly accounting for the impairment of locomotor activity and sleep patterns. Physiological phenotypes and metabolomic changes upon reduction of bmm expression show extensive sexual dimorphism. Altered metabolic states in the Drosophila model are relevant for understanding human metabolic disorders, since pathways of intermediary metabolism are conserved across phyla.
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Affiliation(s)
- Nestor O. Nazario-Yepiz
- Department of Biochemistry and Genetics and Center for Human Genetics, Clemson University, Greenwood, South Carolina, United States of America
| | - Jaime Fernández Sobaberas
- Department of Biochemistry and Genetics and Center for Human Genetics, Clemson University, Greenwood, South Carolina, United States of America
| | - Roberta Lyman
- Department of Biochemistry and Genetics and Center for Human Genetics, Clemson University, Greenwood, South Carolina, United States of America
| | - Marion R. Campbell
- Department of Biochemistry and Genetics and Center for Human Genetics, Clemson University, Greenwood, South Carolina, United States of America
| | - Vijay Shankar
- Department of Biochemistry and Genetics and Center for Human Genetics, Clemson University, Greenwood, South Carolina, United States of America
| | - Robert R. H. Anholt
- Department of Biochemistry and Genetics and Center for Human Genetics, Clemson University, Greenwood, South Carolina, United States of America
| | - Trudy F. C. Mackay
- Department of Biochemistry and Genetics and Center for Human Genetics, Clemson University, Greenwood, South Carolina, United States of America
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15
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Landis GN, Doherty DV, Yen CA, Wang L, Fan Y, Wang I, Vroegop J, Wang T, Wu J, Patel P, Lee S, Abdelmesieh M, Shen J, Promislow DEL, Curran SP, Tower J. Metabolic Signatures of Life Span Regulated by Mating, Sex Peptide, and Mifepristone/RU486 in Female Drosophila melanogaster. J Gerontol A Biol Sci Med Sci 2021; 76:195-204. [PMID: 32648907 DOI: 10.1093/gerona/glaa164] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Indexed: 12/12/2022] Open
Abstract
Mating and transfer of male sex peptide (SP), or transgenic expression of SP, causes inflammation and decreased life span in female Drosophila. Mifepristone rescues these effects, yielding dramatic increases in life span. Here targeted metabolomics data were integrated with further analysis of extant transcriptomic data. Each of 7 genes positively correlated with life span were expressed in the brain or eye and involved regulation of gene expression and signaling. Genes negatively correlated with life span were preferentially expressed in midgut and involved protein degradation, amino acid metabolism, and immune response. Across all conditions, life span was positively correlated with muscle breakdown product 1/3-methylhistidine and purine breakdown product urate, and negatively correlated with tryptophan breakdown product kynurenic acid, suggesting a SP-induced shift from somatic maintenance/turnover pathways to the costly production of energy and lipids from dietary amino acids. Some limited overlap was observed between genes regulated by mifepristone and genes known to be regulated by ecdysone; however, mifepristone was unable to compete with ecdysone for activation of an ecdysone-responsive transgenic reporter. In contrast, genes regulated by mifepristone were highly enriched for genes regulated by juvenile hormone (JH), and mifepristone rescued the negative effect of JH analog methoprene on life span in adult virgin females. The data indicate that mifepristone increases life span and decreases inflammation in mated females by antagonizing JH signaling downstream of male SP. Finally, mifepristone increased life span of mated, but not unmated, Caenorhabditis elegans, in 2 of 3 trials, suggesting possible evolutionary conservation of mifepristone mechanisms.
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Affiliation(s)
- Gary N Landis
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles
| | - Devon V Doherty
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles
| | - Chia-An Yen
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles.,Leonard Davis School of Gerontology, University of Southern California, Los Angeles
| | - Lu Wang
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle
| | - Yang Fan
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles
| | - Ina Wang
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles
| | - Jonah Vroegop
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles
| | - Tianyi Wang
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles
| | - Jimmy Wu
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles
| | - Palak Patel
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles
| | - Shinwoo Lee
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles
| | - Mina Abdelmesieh
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles
| | - Jie Shen
- College of Life Information Science & Instrument Engineering, Hangzhou Dianzi University, China
| | - Daniel E L Promislow
- Department of Biology, University of Washington, Seattle.,Department of Pathology, University of Washington School of Medicine, Seattle
| | - Sean P Curran
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles.,Leonard Davis School of Gerontology, University of Southern California, Los Angeles
| | - John Tower
- Molecular and Computational Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, University of Southern California, Los Angeles.,Leonard Davis School of Gerontology, University of Southern California, Los Angeles
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16
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Shi D, Tan Q, Ruan J, Tian Z, Wang X, Liu J, Liu X, Liu Z, Zhang Y, Sun C, Niu Y. Aging-related markers in rat urine revealed by dynamic metabolic profiling using machine learning. Aging (Albany NY) 2021; 13:14322-14341. [PMID: 34016789 PMCID: PMC8202887 DOI: 10.18632/aging.203046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 04/29/2021] [Indexed: 12/29/2022]
Abstract
The process of aging and metabolism is intimately intertwined; thus, developing biomarkers related to metabolism is critical for delaying aging. However, few studies have identified reliable markers that reflect aging trajectories based on machine learning. We generated metabolomic profiles from rat urine using ultra-performance liquid chromatography/mass spectrometry. This was dynamically collected at four stages of the rat's age (20, 50, 75, and 100 weeks) for both the training and test groups. Partial least squares-discriminant analysis score plots revealed a perfect separation trajectory in one direction with increasing age in the training and test groups. We further screened 25 aging-related biomarkers through the combination of four algorithms (VIP, time-series, LASSO, and SVM-RFE) in the training group. They were validated in the test group with an area under the curve of 1. Finally, six metabolites, known or novel aging-related markers, were identified, including epinephrine, glutarylcarnitine, L-kynurenine, taurine, 3-hydroxydodecanedioic acid, and N-acetylcitrulline. We also found that, except for N-acetylcitrulline (p < 0.05), the identified aging-related metabolites did not differ between tumor-free and tumor-bearing rats at 100 weeks (p > 0.05). Our findings reveal the metabolic trajectories of aging and provide novel biomarkers as potential therapeutic antiaging targets.
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Affiliation(s)
- Dan Shi
- National Key Discipline Laboratory, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, PR China
- Department of Nutrition and Food Hygiene, School of Public Health and Management, Chongqing Medical University, Chongqing 400016, PR China
| | - Qilong Tan
- Department of Epidemiology and Biostatistics, School of Public Health, Harbin Medical University, Harbin, PR China
| | - Jingqi Ruan
- National Key Discipline Laboratory, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, PR China
| | - Zhen Tian
- National Key Discipline Laboratory, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, PR China
| | - Xinyue Wang
- National Key Discipline Laboratory, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, PR China
| | - Jinxiao Liu
- National Key Discipline Laboratory, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, PR China
| | - Xin Liu
- National Key Discipline Laboratory, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, PR China
| | - Zhipeng Liu
- National Key Discipline Laboratory, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, PR China
| | - Yuntao Zhang
- National Key Discipline Laboratory, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, PR China
| | - Changhao Sun
- National Key Discipline Laboratory, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, PR China
| | - Yucun Niu
- National Key Discipline Laboratory, Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, PR China
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17
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G‐Santoyo I, González‐Tokman D, Tapia‐Rodríguez M, Córdoba‐Aguilar A. What doesn't kill you makes you stronger: Detoxification ability as a mechanism of honesty in a sexually selected signal. Funct Ecol 2021. [DOI: 10.1111/1365-2435.13798] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Isaac G‐Santoyo
- Neuroecology Lab Facultad de Psicología Universidad Nacional Autónoma de MéxicoCiudad Universitaria Ciudad de México México
| | | | - Miguel Tapia‐Rodríguez
- Unidad de MicroscopíaInstituto de Investigaciones BiomédicasUniversidad Nacional Autónoma de MéxicoCiudad Universitaria Ciudad de México México
| | - Alex Córdoba‐Aguilar
- Instituto de Ecología Universidad Nacional Autónoma de MéxicoCiudad Universitaria Ciudad de México México
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18
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Aimaiti M, Wumaier A, Aisa Y, Zhang Y, Xirepu X, Aibaidula Y, Lei X, Chen Q, Feng X, Mi N. Acteoside exerts neuroprotection effects in the model of Parkinson's disease via inducing autophagy: Network pharmacology and experimental study. Eur J Pharmacol 2021; 903:174136. [PMID: 33940032 DOI: 10.1016/j.ejphar.2021.174136] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 04/20/2021] [Accepted: 04/26/2021] [Indexed: 12/27/2022]
Abstract
Parkinson's disease (PD) is the second most common neurodegenerative disease after Alzheimer's disease. At present, the incidence rate of PD is increasing worldwide, there is no effective cure available so far, and currently using drugs are still limited in efficacy due to serious side effects. Acteoside (ACT) is an active ingredient of many valuable medicinal plants, possesses potential therapeutic effects on many pathological conditions. In this study, we dissected the neuroprotection effects of ACT on PD and its potential molecular mechanism in our PD model pathology based on network pharmacology prediction and experimental assays. Network pharmacology and bioinformatics analysis demonstrated that ACT has 381 potential targets; among them 78 putative targets associated with PD were closely related to cellular autophagy and apoptotic processes. Our experimental results showed that ACT exerted significant neuroprotection effects on Rotenone (ROT) -induced injury of neuronal cells and Drosophila melanogaster (D. melanogaster). Meanwhile, ACT treatment induced autophagy in both neuronal cell lines and fat bodies of D. melanogaster. Furthermore, ACT treatment decreased ROT induced apoptotic rate and reactive oxygen species production, increased mitochondrial membrane potentials in neuronal cells, and promoted clearance of α-synuclein (SNCA) aggregations in SNCA overexpressed cell model through the autophagy-lysosome pathway. Interestingly, ACT treatment significantly enhanced mitophagy and protected cell injury in neuronal cells. Taken together, ACT may represent a potent stimulator of mitophagy pathway, thereby exerts preventive and therapeutic effects against neurodegenerative diseases such as PD by clearing pathogenic proteins and impaired cellular organelles like damaged mitochondria in neurons.
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Affiliation(s)
- Mutalifu Aimaiti
- State Key Laboratory of Pathogenesis, Prevention and Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, Xinjiang, China; Department of Pharmacology, College of Pharmacy, Xinjiang Medical University, Urumqi, 830017, Xinjiang, China; Central Laboratory, Xinjiang Medical University, Urumqi, 830011, Xinjiang, China
| | - Ainiwaer Wumaier
- Department of Pharmacology, College of Pharmacy, Xinjiang Medical University, Urumqi, 830017, Xinjiang, China
| | - Yiliyasi Aisa
- State Key Laboratory of Pathogenesis, Prevention and Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, Xinjiang, China; Department of Pharmacology, College of Pharmacy, Xinjiang Medical University, Urumqi, 830017, Xinjiang, China
| | - Yu Zhang
- State Key Laboratory of Pathogenesis, Prevention and Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, Xinjiang, China; Department of Biology, School of Basic Medical Sciences, Xinjiang Medical University, Urumqi, 830017, Xinjiang, China
| | - Xirenayi Xirepu
- State Key Laboratory of Pathogenesis, Prevention and Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, Xinjiang, China; Department of Teaching and Research of Crude Drugs, College of Pharmacy, Xinjiang Medical University, Urumqi, 830017, Xinjiang, China
| | - Yilizire Aibaidula
- State Key Laboratory of Pathogenesis, Prevention and Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, Xinjiang, China; Department of Pharmaceutical Analysis, College of Pharmacy, Xinjiang Medical University, Urumqi, 830017, Xinjiang, China
| | - XiuYing Lei
- State Key Laboratory of Pathogenesis, Prevention and Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, Xinjiang, China; Department of Biochemistry, College of Basic Medical Sciences, Xinjiang Medical University, Urumqi, 830017, Xinjiang, China
| | - Qian Chen
- State Key Laboratory of Pathogenesis, Prevention and Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, Xinjiang, China; Department of Biochemistry, College of Basic Medical Sciences, Xinjiang Medical University, Urumqi, 830017, Xinjiang, China
| | - XueZhao Feng
- State Key Laboratory of Pathogenesis, Prevention and Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, Xinjiang, China; Department of Biochemistry, College of Basic Medical Sciences, Xinjiang Medical University, Urumqi, 830017, Xinjiang, China
| | - Na Mi
- State Key Laboratory of Pathogenesis, Prevention and Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, Xinjiang, China.
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19
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Gut Bacteria Mediate Nutrient Availability in Drosophila Diets. Appl Environ Microbiol 2020; 87:AEM.01401-20. [PMID: 33067193 PMCID: PMC7755257 DOI: 10.1128/aem.01401-20] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 10/13/2020] [Indexed: 12/12/2022] Open
Abstract
Drosophila melanogaster gut microbes play important roles in host nutritional physiology. However, these associations are often indirect, and studies typically are in the context of specialized nutritional conditions, making it difficult to discern how microbiome-mediated impacts translate to physiologically relevant conditions, in the laboratory or nature. In this study, we quantified changes in dietary nutrients due to D. melanogaster gut bacteria on three artificial diets and a natural diet of grapes. We show that under all four diet conditions, bacteria altered the protein, carbohydrates, and moisture of the food substrate. An in-depth analysis of one diet revealed that bacteria also increased the levels of tryptophan, an essential amino acid encountered scarcely in nature. These nutrient changes result in an increased protein-to-carbohydrate (P:C) ratio in all diets, which we hypothesized to be a significant determinant of microbiome-mediated host nutritional physiology. To test this, we compared life history traits of axenic flies reared on the three artificial diets with increased P:C ratios or continuous bacterial inoculation. We found that while on some diets, an environment of nutritional plenitude had impacts on life history, it did not fully explain all microbiome-associated phenotypes. This suggests that other factors, such as micronutrients and feeding behavior, likely also contribute to life history traits in a diet-dependent manner. Thus, while some bacterial impacts on nutrition occur across diets, others are dictated by unique dietary environments, highlighting the importance of diet-microbiome interactions in D. melanogaster nutritional physiology.IMPORTANCE Both in the laboratory and in nature, D. melanogaster-associated microbes serve as nutritional effectors, either through the production of metabolites or as direct sources of protein biomass. The relationship between the microbiome and the resulting host nutritional physiology is significantly impacted by diet composition, yet studies involving D. melanogaster are performed using a wide range of artificial diets, making it difficult to discern which aspects of host-microbe interactions may be universal or diet dependent. In this study, we utilized three standard D. melanogaster diets and a natural grape diet to form a comprehensive understanding of the quantifiable nutritional changes mediated by the host microbial community. We then altered these artificial diets based on the observed microbe-mediated changes to demonstrate their potential to influence host physiology, allowing us to identify nutritional factors whose effects were either universal for the three artificial diets or dependent on host diet composition.
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20
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Targeting metabolic pathways for extension of lifespan and healthspan across multiple species. Ageing Res Rev 2020; 64:101188. [PMID: 33031925 DOI: 10.1016/j.arr.2020.101188] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 08/20/2020] [Accepted: 09/21/2020] [Indexed: 12/16/2022]
Abstract
Metabolism plays a significant role in the regulation of aging at different levels, and metabolic reprogramming represents a major driving force in aging. Metabolic reprogramming leads to impaired organismal fitness, an age-dependent increase in susceptibility to diseases, decreased ability to mount a stress response, and increased frailty. The complexity of age-dependent metabolic reprogramming comes from the multitude of levels on which metabolic changes can be connected to aging and regulation of lifespan. This is further complicated by the different metabolic requirements of various tissues, cross-organ communication via metabolite secretion, and direct effects of metabolites on epigenetic state and redox regulation; however, not all of these changes are causative to aging. Studies in yeast, flies, worms, and mice have played a crucial role in identifying mechanistic links between observed changes in various metabolic traits and their effects on lifespan. Here, we review how changes in the organismal and organ-specific metabolome are associated with aging and how targeting of any one of over a hundred different targets in specific metabolic pathways can extend lifespan. An important corollary is that restriction or supplementation of different metabolites can change activity of these metabolic pathways in ways that improve healthspan and extend lifespan in different organisms. Due to the high levels of conservation of metabolism in general, translating findings from model systems to human beings will allow for the development of effective strategies for human health- and lifespan extension.
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21
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Jang IY, Park JH, Kim JH, Lee S, Lee E, Lee JY, Park SJ, Kim DA, Hamrick MW, Kim BJ. The association of circulating kynurenine, a tryptophan metabolite, with frailty in older adults. Aging (Albany NY) 2020; 12:22253-22265. [PMID: 33188590 DOI: 10.18632/aging.104179] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Accepted: 09/05/2020] [Indexed: 06/11/2023]
Abstract
Despite the accumulating evidence from in vitro and animal experiments supporting the role of kynurenine (a tryptophan metabolite) in a number of degenerative age-related changes, the relationship between kynurenine and frailty in older adults is not well understood. We collected blood samples from 73 participants who underwent a comprehensive geriatric assessment, measuring kynurenine levels using liquid chromatography-tandem mass spectrometry. We assessed the phenotypic frailty and the deficit accumulation frailty index using widely validated approaches proposed by Fried et al. and Rockwood et al., respectively. After adjusting for sex, age, and body mass index, the frail participants presented 52.9% and 34.3% higher serum kynurenine levels than those with robustness and prefrailty, respectively (P = 0.005 and 0.014, respectively). Serum kynurenine levels were positively associated with the frailty index, time to complete 5 chair stands, and patient health questionnaire-2 score and inversely associated with grip strength and gait speed (P = 0.042 to <0.001). Furthermore, the odds ratio per increase in serum kynurenine level for phenotypic frailty was approximately 2.62 (95% confidence interval = 1.22-5.65, P = 0.014). These data provide clinical evidence that circulating kynurenine might be a potential biomarker for assessing the risk of frailty in humans.
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Affiliation(s)
- Il-Young Jang
- Division of Geriatrics, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Jin Hoon Park
- Department of Neurological Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Jeoung Hee Kim
- Department of Neurological Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Seungjoo Lee
- Department of Neurological Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Eunju Lee
- Division of Geriatrics, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Jin Young Lee
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - So Jeong Park
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Da Ae Kim
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Mark W Hamrick
- Department of Cell Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Beom-Jun Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
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22
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Maddison DC, Alfonso-Núñez M, Swaih AM, Breda C, Campesan S, Allcock N, Straatman-Iwanowska A, Kyriacou CP, Giorgini F. A novel role for kynurenine 3-monooxygenase in mitochondrial dynamics. PLoS Genet 2020; 16:e1009129. [PMID: 33170836 PMCID: PMC7654755 DOI: 10.1371/journal.pgen.1009129] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 09/22/2020] [Indexed: 11/19/2022] Open
Abstract
The enzyme kynurenine 3-monooxygenase (KMO) operates at a critical branch-point in the kynurenine pathway (KP), the major route of tryptophan metabolism. As the KP has been implicated in the pathogenesis of several human diseases, KMO and other enzymes that control metabolic flux through the pathway are potential therapeutic targets for these disorders. While KMO is localized to the outer mitochondrial membrane in eukaryotic organisms, no mitochondrial role for KMO has been described. In this study, KMO deficient Drosophila melanogaster were investigated for mitochondrial phenotypes in vitro and in vivo. We find that a loss of function allele or RNAi knockdown of the Drosophila KMO ortholog (cinnabar) causes a range of morphological and functional alterations to mitochondria, which are independent of changes to levels of KP metabolites. Notably, cinnabar genetically interacts with the Parkinson's disease associated genes Pink1 and parkin, as well as the mitochondrial fission gene Drp1, implicating KMO in mitochondrial dynamics and mitophagy, mechanisms which govern the maintenance of a healthy mitochondrial network. Overexpression of human KMO in mammalian cells finds that KMO plays a role in the post-translational regulation of DRP1. These findings reveal a novel mitochondrial role for KMO, independent from its enzymatic role in the kynurenine pathway.
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Affiliation(s)
- Daniel C. Maddison
- Department of Genetics and Genome Biology, University of Leicester, Leicester, LE1 7RH, United Kingdom
| | - Mónica Alfonso-Núñez
- Department of Genetics and Genome Biology, University of Leicester, Leicester, LE1 7RH, United Kingdom
| | - Aisha M. Swaih
- Department of Genetics and Genome Biology, University of Leicester, Leicester, LE1 7RH, United Kingdom
| | - Carlo Breda
- Department of Genetics and Genome Biology, University of Leicester, Leicester, LE1 7RH, United Kingdom
- Leicester School of Allied Health Sciences, Faculty of Health and Life Sciences, De Montfort University, Leicester, LE1 9BH, United Kingdom
| | - Susanna Campesan
- Department of Genetics and Genome Biology, University of Leicester, Leicester, LE1 7RH, United Kingdom
| | - Natalie Allcock
- Core Biotechnology Services, Adrian Building, University of Leicester, University Road, Leicester, LE1 7RH, Leicestershire, United Kingdom
| | - Anna Straatman-Iwanowska
- Core Biotechnology Services, Adrian Building, University of Leicester, University Road, Leicester, LE1 7RH, Leicestershire, United Kingdom
| | - Charalambos P. Kyriacou
- Department of Genetics and Genome Biology, University of Leicester, Leicester, LE1 7RH, United Kingdom
| | - Flaviano Giorgini
- Department of Genetics and Genome Biology, University of Leicester, Leicester, LE1 7RH, United Kingdom
- * E-mail:
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23
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24
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Castro-Portuguez R, Sutphin GL. Kynurenine pathway, NAD + synthesis, and mitochondrial function: Targeting tryptophan metabolism to promote longevity and healthspan. Exp Gerontol 2020; 132:110841. [PMID: 31954874 DOI: 10.1016/j.exger.2020.110841] [Citation(s) in RCA: 119] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 01/12/2020] [Accepted: 01/13/2020] [Indexed: 12/12/2022]
Abstract
Aging is characterized by a progressive decline in the normal physiological functions of an organism, ultimately leading to mortality. Nicotinamide adenine dinucleotide (NAD+) is an essential cofactor that plays a critical role in mitochondrial energy production as well as many enzymatic redox reactions. Age-associated decline in NAD+ is implicated as a driving factor in several categories of age-associated disease, including metabolic and neurodegenerative disease, as well as deficiency in the mechanisms of cellular defense against oxidative stress. The kynurenine metabolic pathway is the sole de novo NAD+ biosynthetic pathway, generating NAD+ from ingested tryptophan. Altered kynurenine pathway activity is associated with both aging and a variety of age-associated diseases. Kynurenine pathway interventions can extend lifespan in both fruit flies and nematodes, and altered NAD+ metabolism represents one potential mediating mechanism. Recent studies demonstrate that supplementation with NAD+ or NAD+-precursors increase longevity and promote healthy aging in fruit flies, nematodes, and mice. NAD+ levels and the intrinsic relationship to mitochondrial function have been widely studied in the context of aging. Mitochondrial function and dynamics have both been implicated in longevity determination in a range of organisms from yeast to humans, at least in part due to their intimate link to regulating an organism's cellular energy economy and capacity to resist oxidative stress. Recent findings support the idea that complex communication between the mitochondria and the nucleus orchestrates a series of events and stress responses involving mitophagy, mitochondrial number, mitochondrial unfolded protein response (UPRmt), and mitochondria fission and fusion events. In this review, we discuss how mitochondrial morphological changes and dynamics operate during aging, and how altered metabolism of tryptophan to NAD+ through the kynurenine pathway interacts with these processes.
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Affiliation(s)
- Raul Castro-Portuguez
- Cancer Biology Graduate Interdisciplinary Program, University of Arizona, Tucson, 85721, AZ, USA
| | - George L Sutphin
- Cancer Biology Graduate Interdisciplinary Program, University of Arizona, Tucson, 85721, AZ, USA; Department of Molecular and Cellular Biology, University of Arizona, Tucson, 85721, AZ, USA.
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25
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Kynurenine signaling through the aryl hydrocarbon receptor: Implications for aging and healthspan. Exp Gerontol 2019; 130:110797. [PMID: 31786316 DOI: 10.1016/j.exger.2019.110797] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 11/25/2019] [Indexed: 12/25/2022]
Abstract
The tryptophan metabolite kynurenine increases with aging and inflammation, and appears to contribute directly to the development and progression of several age-related conditions. Kynurenine is now known to signal through the aryl hydrocarbon receptor (Ahr) to modulate levels of reactive oxygen species (ROS). The Ahr promoter region contains several sites for NF-kB binding, indicating that inflammation is a key factor modulating Ahr expression. Furthermore, kynurenine activation of Ahr is observed to stimulate expression of the enzyme IDO1, which generates kynurenine by degrading tryptophan, representing a positive feedback loop that may link inflammation with ROS production. On the other hand, the antioxidant system-inducing transcription factor Nrf2 can be stimulated by Ahr, and Nrf2 can itself activate Ahr expression. The balance between pro- and antioxidant functions of Ahr mediated by kynurenine may therefore regulate healthy versus unhealthy aging in different tissues and organ systems. Potential therapeutic approaches to target this pathway include exercise to alter kynurenine production or molecules such as metformin or resveratrol that may suppress Ahr activity.
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26
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Tryptophan metabolism as a common therapeutic target in cancer, neurodegeneration and beyond. Nat Rev Drug Discov 2019; 18:379-401. [PMID: 30760888 DOI: 10.1038/s41573-019-0016-5] [Citation(s) in RCA: 746] [Impact Index Per Article: 149.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
L-Tryptophan (Trp) metabolism through the kynurenine pathway (KP) is involved in the regulation of immunity, neuronal function and intestinal homeostasis. Imbalances in Trp metabolism in disorders ranging from cancer to neurodegenerative disease have stimulated interest in therapeutically targeting the KP, particularly the main rate-limiting enzymes indoleamine-2,3-dioxygenase 1 (IDO1), IDO2 and tryptophan-2,3-dioxygenase (TDO) as well as kynurenine monooxygenase (KMO). However, although small-molecule IDO1 inhibitors showed promise in early-stage cancer immunotherapy clinical trials, a phase III trial was negative. This Review summarizes the physiological and pathophysiological roles of Trp metabolism, highlighting the vast opportunities and challenges for drug development in multiple diseases.
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27
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Hoffman JM, Ross C, Tran V, Promislow DEL, Tardif S, Jones DP. The metabolome as a biomarker of mortality risk in the common marmoset. Am J Primatol 2018; 81:e22944. [PMID: 30585652 DOI: 10.1002/ajp.22944] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 11/13/2018] [Indexed: 12/26/2022]
Abstract
Recently, the common marmoset has been proposed as a non-human primate model of aging. Their short lifespan coupled with pathologies that are similar to humans make them an ideal model to understand the genetic, metabolic, and environmental factors that influence aging and longevity. However, many of the underlying physiological changes that occur with age in the marmoset are unknown. Here, we attempt to determine if individual metabolites are predictive of future death and to recapitulate past metabolomic results after a change in environment (move across the country) was imposed on a colony of marmosets. We first determined that low levels of tryptophan metabolism metabolites were associated with risk of death in a 2-year follow-up in the animals, suggesting these metabolites may be used as future biomarkers of mortality. We also discovered that betaine metabolism and methionine metabolism are associated with aging regardless of environment for the animals, or of metabolomic assay technique. These two metabolic pathways are therefore of particular interest to examine as future targets for health and lifespan extending interventions. Many of the pathways associated with age in our first study of marmoset metabolomics were not found to have significant age effects in our second study, suggesting more work is needed to understand the reproducibility of large scale metabolomic studies in mammalian models. Overall, we were able to show that while several metabolomics markers show promise in understanding health and lifespan relationships with aging, it is possible that choice of technique for assay and reproducibility in these types of studies are still issues that need to be examined further.
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Affiliation(s)
- Jessica M Hoffman
- Department of Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Corinna Ross
- Department of Science and Mathematics, Texas A&M University San Antonio, San Antonio, Texas
| | - ViLinh Tran
- Division of Pulmonary Allergy and Critical Care, Department of Medicine, Emory University, Atlanta, Georgia.,Clinical Biomarkers Laboratory, Department of Medicine, Emory University, Atlanta, Georgia
| | - Daniel E L Promislow
- Department of Pathology, University of Washington, Seattle, Washington.,Department of Biology, University of Washington, Seattle, Washington
| | - Suzette Tardif
- Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, Texas
| | - Dean P Jones
- Division of Pulmonary Allergy and Critical Care, Department of Medicine, Emory University, Atlanta, Georgia.,Clinical Biomarkers Laboratory, Department of Medicine, Emory University, Atlanta, Georgia
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28
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Shaposhnikov MV, Zemskaya NV, Koval LA, Schegoleva EV, Zhavoronkov A, Moskalev AA. Effects of N-acetyl-L-cysteine on lifespan, locomotor activity and stress-resistance of 3 Drosophila species with different lifespans. Aging (Albany NY) 2018; 10:2428-2458. [PMID: 30243020 PMCID: PMC6188487 DOI: 10.18632/aging.101561] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 09/13/2018] [Indexed: 04/28/2023]
Abstract
N-acetyl-L-cysteine (NAC) is a derivative of the sulphur-containing amino acid L-cysteine with potential anti-aging properties. We studied 3 Drosophila species with contrast longevity differences (D. virilis is longest-lived, D. kikkawai is shortest-lived and D. melanogaster has moderate lifespan) to test the effects of NAC at 8 different concentrations (from 10 nM to 100 mM) on the lifespan, stress-resistance and locomotor activity. Except the adverse effects of highest (10 mM and 100 mM) concentrations NAC demonstrated sexually opposite and male-biased effects on Drosophila lifespan, stress-resistance and locomotor activity and not satisfied the criteria of a geroprotector in terms of the reproducibility of lifespan extending effects in different model organisms. The concentration- and sex-dependent changes in the relative expression levels of the antioxidant genes (Cat/CG6871 and Sod1/CG11793) and genes involved in hydrogen sulfide biosynthesis (Cbs/CG1753, Eip55E/CG5345 and Nfs1/CG12264) suggest the involvement of hormetic mechanisms in the geroprotective effects of NAC.
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Affiliation(s)
- Mikhail V. Shaposhnikov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia
- Institute of Biology of Komi Science Center of Ural Branch of RAS, Syktyvkar 167982, Russia
| | - Nadezhda V. Zemskaya
- Institute of Biology of Komi Science Center of Ural Branch of RAS, Syktyvkar 167982, Russia
| | - Liubov A. Koval
- Institute of Biology of Komi Science Center of Ural Branch of RAS, Syktyvkar 167982, Russia
| | - Eugenia V. Schegoleva
- Institute of Biology of Komi Science Center of Ural Branch of RAS, Syktyvkar 167982, Russia
| | - Alex Zhavoronkov
- Insilico Medicine, Inc, JHU, Rockville, MD 21218, USA
- Moscow Institute of Physics and Technology, Dolgoprudny 141700, Russia
| | - Alexey A. Moskalev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia
- Institute of Biology of Komi Science Center of Ural Branch of RAS, Syktyvkar 167982, Russia
- Moscow Institute of Physics and Technology, Dolgoprudny 141700, Russia
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29
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Cervenka I, Agudelo LZ, Ruas JL. Kynurenines: Tryptophan's metabolites in exercise, inflammation, and mental health. Science 2018; 357:357/6349/eaaf9794. [PMID: 28751584 DOI: 10.1126/science.aaf9794] [Citation(s) in RCA: 719] [Impact Index Per Article: 119.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Kynurenine metabolites are generated by tryptophan catabolism and regulate biological processes that include host-microbiome signaling, immune cell response, and neuronal excitability. Enzymes of the kynurenine pathway are expressed in different tissues and cell types throughout the body and are regulated by cues, including nutritional and inflammatory signals. As a consequence of this systemic metabolic integration, peripheral inflammation can contribute to accumulation of kynurenine in the brain, which has been associated with depression and schizophrenia. Conversely, kynurenine accumulation can be suppressed by activating kynurenine clearance in exercised skeletal muscle. The effect of exercise training on depression through modulation of the kynurenine pathway highlights an important mechanism of interorgan cross-talk mediated by these metabolites. Here, we discuss peripheral mechanisms of tryptophan-kynurenine metabolism and their effects on inflammatory, metabolic, oncologic, and psychiatric disorders.
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Affiliation(s)
- Igor Cervenka
- Department of Physiology and Pharmacology, Molecular and Cellular Exercise Physiology, Karolinska Institutet, SE-17177 Stockholm, Sweden
| | - Leandro Z Agudelo
- Department of Physiology and Pharmacology, Molecular and Cellular Exercise Physiology, Karolinska Institutet, SE-17177 Stockholm, Sweden
| | - Jorge L Ruas
- Department of Physiology and Pharmacology, Molecular and Cellular Exercise Physiology, Karolinska Institutet, SE-17177 Stockholm, Sweden.
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30
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Sathyasaikumar KV, Breda C, Schwarcz R, Giorgini F. Assessing and Modulating Kynurenine Pathway Dynamics in Huntington's Disease: Focus on Kynurenine 3-Monooxygenase. Methods Mol Biol 2018; 1780:397-413. [PMID: 29856028 DOI: 10.1007/978-1-4939-7825-0_18] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The link between disturbances in kynurenine pathway (KP) metabolism and Huntington's disease (HD) pathogenesis has been explored for a number of years. Several novel genetic and pharmacological tools have recently been developed to modulate key regulatory steps in the KP such as the reaction catalyzed by the enzyme kynurenine 3-monooxygenase (KMO). This insight has offered new options for exploring the mechanistic link between this metabolic pathway and HD, and provided novel opportunities for the development of candidate drug-like compounds. Here, we present an overview of the field, focusing on some novel approaches for interrogating the pathway experimentally.
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Affiliation(s)
- Korrapati V Sathyasaikumar
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Carlo Breda
- Department of Genetics and Genome Biology, University of Leicester, Leicester, UK
| | - Robert Schwarcz
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Flaviano Giorgini
- Department of Genetics and Genome Biology, University of Leicester, Leicester, UK.
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31
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Zhou YZ, Yan ML, Gao L, Zhang JQ, Qin XM, Zhang X, Du GH. Metabonomics approach to assessing the metabolism variation and gender gap of Drosophila melanogaster in aging process. Exp Gerontol 2017; 98:110-119. [DOI: 10.1016/j.exger.2017.07.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 07/25/2017] [Accepted: 07/31/2017] [Indexed: 02/06/2023]
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Beasley V, Dowse H. Suppression of Tryptophan 2,3-Dioxygenase Produces a Slow Heartbeat Phenotype in Drosophila melanogaster. ACTA ACUST UNITED AC 2017; 325:651-664. [PMID: 28127944 DOI: 10.1002/jez.2057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 11/23/2016] [Accepted: 12/01/2016] [Indexed: 12/27/2022]
Abstract
The primary pathway utilizing tryptophan leads initially to kynurenine before branching. Products include nicotinamide adenine dinucleotide and important pigments in the eye. Products in this pathway have been linked to a number of pathologies. The gene encoding the first step in this pathway, tryptophan 2,3-dioxegenase, is encoded by the gene vermilion, initially discovered in Drosophila. In the fly, v is an important eye color marker, but is found to have multiple pleiotropic effects. We have uncovered significant effects of this mutation on the fly heart. The heart beats more slowly and more rhythmically in both males and females and in strains which we have outcrossed. In addition, the fly heart normally beats irregularly with multiple brief stoppages, and the time structure of these stoppages, as investigated by looking at interbeat intervals, is changed in flies bearing this mutation. Fewer flies bearing the v1 mutation show long hiatuses in beat compared to wild type, however, in some strains of the mutant animals that do, the number of stoppages in much greater and the mean duration is longer.
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Affiliation(s)
- Vernon Beasley
- School of Biology and Ecology, University of Maine, Orono, Maine
| | - Harold Dowse
- School of Biology and Ecology, University of Maine, Orono, Maine.,Department of Mathematics and Statistics, University of Maine, Orono, Maine
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33
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Schwarcz R, Stone TW. The kynurenine pathway and the brain: Challenges, controversies and promises. Neuropharmacology 2017; 112:237-247. [PMID: 27511838 PMCID: PMC5803785 DOI: 10.1016/j.neuropharm.2016.08.003] [Citation(s) in RCA: 252] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 07/29/2016] [Accepted: 08/05/2016] [Indexed: 12/29/2022]
Abstract
Research on the neurobiology of the kynurenine pathway has suffered years of relative obscurity because tryptophan degradation, and its involvement in both physiology and major brain diseases, was viewed almost exclusively through the lens of the well-established metabolite serotonin. With increasing recognition that kynurenine and its metabolites can affect and even control a variety of classic neurotransmitter systems directly and indirectly, interest is expanding rapidly. Moreover, kynurenine pathway metabolism itself is modulated in conditions such as infection and stress, which are known to induce major changes in well-being and behaviour, so that kynurenines may be instrumental in the etiology of psychiatric and neurological disorders. It is therefore likely that the near future will not only witness the discovery of additional physiological and pathological roles for brain kynurenines, but also ever-increasing interest in drug development based on these roles. In particular, targeting the kynurenine pathway with new specific agents may make it possible to prevent disease by appropriate pharmacological or genetic manipulations. The following overview focuses on areas of kynurenine research which are either controversial, of major potential therapeutic interest, or just beginning to receive the degree of attention which will clarify their relevance to neurobiology and medicine. It also highlights technical issues so that investigators entering the field, and new research initiatives, are not misdirected by inappropriate experimental approaches or incorrect interpretations at this time of skyrocketing interest in the subject matter. This article is part of the Special Issue entitled 'The Kynurenine Pathway in Health and Disease'.
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Affiliation(s)
- Robert Schwarcz
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD, USA.
| | - Trevor W Stone
- Institute of Neuroscience and Psychology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
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34
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Navrotskaya V, Oxenkrug G. Effect of kynurenic acid on development and aging in wild type and vermilion mutants of Drosophila melanogaster. ACTA ACUST UNITED AC 2016; 1. [PMID: 28393115 PMCID: PMC5381657 DOI: 10.15761/pddt.1000104] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Background Up-regulation of tryptophan (Trp) conversion into kynurenine (Kyn) and increased formation of down-stream metabolites of Kyn is one of the mechanisms of aging and neurodegenerative disorders. Kyn is an immediate precursor of kynurenic acid (KYNA), an antagonist to NMDA and α7nAChR receptors and activator of aryl hydrocarbon receptor. Increased formation of KYNA ameliorates neurodegeneration and eclosion defect in Drosophila model of Huntington’s Disease. Aims Effect of KYNA on pupae viability and life span was evaluated in wild type (Canton-S, CS) and vermilion Drosophila mutants with deficient formation of Kyn due to mutation of vermilion gene (v) that encodes the Trp-2,3-dioxygenase (TDO), enzyme catalyzing Trp conversion into Kyn. Methods Vermilion mutants were transferred into the Canton-S genetic background (v-CS). KYNA effect on viability (number of filial generation pupae and %% of their lethality) was assessed in pupae maintained at standard temperature (23°C). KYNA effect on life span was evaluated in adult (imago) flies maintained at 28°C (accelerated aging). Results KYNA drastically increased (4 fold from 8.36 to 33.62) %% of dead pupae in Canton-S but not in v-CS flies (p=0.0001). KYNA did not affect life span of female Canton-S flies but decreased life span of v-CS female flies (from 17.15 to 14.29 days). KYNA increased life span of male Canton-S (from 17.92 to 19.96 days) and v-CS flies (14.52 to 17.75 days). Discussion This the first (to the best of our knowledge) observation of the toxic effect of KYNA in Drosophila pupae. KYNA effect on high-temperature induced aging acceleration was gender dependent. Present data support the role of downstream Kyn metabolites in aging mechanisms.
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Affiliation(s)
- Valeriya Navrotskaya
- Department of Genetics and Cytology, V.N. Karazin Kharkiv National University, Ukraine
| | - Gregory Oxenkrug
- Psychiatry and Inflammation Program, Department of Psychiatry, Tufts University/Tufts Medical Center, Boston, USA
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35
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Tryptophan-2,3-dioxygenase (TDO) inhibition ameliorates neurodegeneration by modulation of kynurenine pathway metabolites. Proc Natl Acad Sci U S A 2016; 113:5435-40. [PMID: 27114543 DOI: 10.1073/pnas.1604453113] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Metabolites of the kynurenine pathway (KP) of tryptophan (TRP) degradation have been closely linked to the pathogenesis of several neurodegenerative disorders. Recent work has highlighted the therapeutic potential of inhibiting two critical regulatory enzymes in this pathway-kynurenine-3-monooxygenase (KMO) and tryptophan-2,3-dioxygenase (TDO). Much evidence indicates that the efficacy of KMO inhibition arises from normalizing an imbalance between neurotoxic [3-hydroxykynurenine (3-HK); quinolinic acid (QUIN)] and neuroprotective [kynurenic acid (KYNA)] KP metabolites. However, it is not clear if TDO inhibition is protective via a similar mechanism or if this is instead due to increased levels of TRP-the substrate of TDO. Here, we find that increased levels of KYNA relative to 3-HK are likely central to the protection conferred by TDO inhibition in a fruit fly model of Huntington's disease and that TRP treatment strongly reduces neurodegeneration by shifting KP flux toward KYNA synthesis. In fly models of Alzheimer's and Parkinson's disease, we provide genetic evidence that inhibition of TDO or KMO improves locomotor performance and ameliorates shortened life span, as well as reducing neurodegeneration in Alzheimer's model flies. Critically, we find that treatment with a chemical TDO inhibitor is robustly protective in these models. Consequently, our work strongly supports targeting of the KP as a potential treatment strategy for several major neurodegenerative disorders and suggests that alterations in the levels of neuroactive KP metabolites could underlie several therapeutic benefits.
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Navrotskaya V, Oxenkrug G, Vorobyova L, Summergrad P. Attenuation of high sucrose diet-induced insulin resistance in ABC transporter deficient white mutant of Drosophila melanogaster. INTEGRATIVE OBESITY AND DIABETES 2016; 2:187-190. [PMID: 27375855 PMCID: PMC4928640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Exposure to high sugar diet (HSD) is an experimental model of insulin resistance (IR) and type 2 diabetes (T2D) in mammals and insects. In Drosophila, HSD-induced IR delays emergence of pupae from larvae and eclosion of imago from pupae. Understanding of mechanisms of IR/T2D is essential for refining T2D prevention and treatment strategies. Dysregulation of tryptophan (Trp)-kynurenine (Kyn) pathway was suggested as one of the mechanisms of IR/T2D development. Rate-limiting enzyme of Trp-Kyn pathway in Drosophila is Trp 2,3-dioxygenase (TDO), an evolutionary conserved ortholog of human TDO. We previously reported attenuation of HSD-induced IR in vermilion mutants with inactive TDO. Conversion of Trp to Kyn is regulated not only by TDO activity but by intracellular Trp transport via ATP-binding cassette (ABC) transporter encoded by white gene in Drosophila. In order to evaluate the possible impact of deficient intracellular Trp transport on the inducement of IR by HSD, we compared the effect of HSD on pre-imago development in wild type flies, Canton-Special (C-S), and C-S flies containing white gene, white (C-S). Presence of white gene attenuated (by 50%) HSD-induced delay of pupae emergence from larvae and female and male imago eclosion from pupae. Present study together with our earlier report reveals that both decreased TDO activity (due to vermilion gene mutation) or deficient Trp transport into cell without affecting TDO levels (due to white gene mutation) attenuate HSD-induced development of IR in Drosophila model of T2D. Our data provide further support for hypothesis that dysregulation of Trp-Kyn pathway is one of the pathophysiological mechanisms and potential target for early diagnosis, prevention and treatment of IR/T2D.
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Affiliation(s)
- Valeriya Navrotskaya
- Department of Genetics and Cytology, V.N. Karazin Kharkiv National University, Ukraine
| | - Gregory Oxenkrug
- Psychiatry and Inflammation Program, Department of Psychiatry, Tufts University/Tufts Medical Center, USA
| | - Lyudmila Vorobyova
- Department of Genetics and Cytology, V.N. Karazin Kharkiv National University, Ukraine
| | - Paul Summergrad
- Psychiatry and Inflammation Program, Department of Psychiatry, Tufts University/Tufts Medical Center, USA
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Liu S, Yang B, Luo J, Tang J, Wu J. A Comparative Study on the Population Fitness of Three Strains of Nilaparvata lugens (Hemiptera: Delphacidae) Differ in Eye Color-Related Genes. JOURNAL OF ECONOMIC ENTOMOLOGY 2015; 108:1675-1682. [PMID: 26470308 DOI: 10.1093/jee/tov154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 05/19/2015] [Indexed: 06/05/2023]
Abstract
The brown planthopper, Nilaparvata lugens (Stål), is a destructive insect pest on rice throughout Asia. As a visible genetic marker, red eye mutant colony of brown planthopper is a valuable material. Here, we established the near-isogenic lines, NIL-BB and NIL-rr, through mating red eye females to brown eye brothers for eight successive generations. Biological experiments showed that NIL-BB had big fitness cost; however, NIL-rr had comparable survival and fertility parameters with BB, a normal laboratory brown planthopper strain. Significantly lower number eggs per female and egg hatchability were the key factors resulting in big fitness cost of NIL-BB. The population trend indexes of BB, NIL-rr, and NIL-BB were 52.18, 43.80, and 4.19, respectively. Real-time PCR study suggested that the poorer fertility of NIL-BB was not mediated by the differential expression of genes relating to oogenesis. The stronger fitness of NIL-rr compared with NIL-BB may be caused by the eye mutant gene or its closely linked genes having stronger compensation ability for reproduction. The comparable fitness of NIL-rr with BB indicated that NIL-rr may be used in field research. The NIL-BB strain with significantly declined fecundity and survival ability can be used as study model for the signal pathways relating to fecundity.
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Affiliation(s)
- Shuhua Liu
- School of Plant Protection, Yangzhou University, Yangzhou 225009, China. State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310000, China.
| | - Baojun Yang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310000, China
| | - Ju Luo
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310000, China
| | - Jian Tang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310000, China
| | - Jincai Wu
- School of Plant Protection, Yangzhou University, Yangzhou 225009, China.
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3-Hydroxykynurenic Acid and Type 2 Diabetes: Implications for Aging, Obesity, Depression, Parkinson’s Disease, and Schizophrenia. TRYPTOPHAN METABOLISM: IMPLICATIONS FOR BIOLOGICAL PROCESSES, HEALTH AND DISEASE 2015. [DOI: 10.1007/978-3-319-15630-9_8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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He C, Tsuchiyama SK, Nguyen QT, Plyusnina EN, Terrill SR, Sahibzada S, Patel B, Faulkner AR, Shaposhnikov MV, Tian R, Tsuchiya M, Kaeberlein M, Moskalev AA, Kennedy BK, Polymenis M. Enhanced longevity by ibuprofen, conserved in multiple species, occurs in yeast through inhibition of tryptophan import. PLoS Genet 2014; 10:e1004860. [PMID: 25521617 PMCID: PMC4270464 DOI: 10.1371/journal.pgen.1004860] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Accepted: 10/29/2014] [Indexed: 11/29/2022] Open
Abstract
The common non-steroidal anti-inflammatory drug ibuprofen has been associated with a reduced risk of some age-related pathologies. However, a general pro-longevity role for ibuprofen and its mechanistic basis remains unclear. Here we show that ibuprofen increased the lifespan of Saccharomyces cerevisiae, Caenorhabditis elegans and Drosophila melanogaster, indicative of conserved eukaryotic longevity effects. Studies in yeast indicate that ibuprofen destabilizes the Tat2p permease and inhibits tryptophan uptake. Loss of Tat2p increased replicative lifespan (RLS), but ibuprofen did not increase RLS when Tat2p was stabilized or in an already long-lived strain background impaired for aromatic amino acid uptake. Concomitant with lifespan extension, ibuprofen moderately reduced cell size at birth, leading to a delay in the G1 phase of the cell cycle. Similar changes in cell cycle progression were evident in a large dataset of replicatively long-lived yeast deletion strains. These results point to fundamental cell cycle signatures linked with longevity, implicate aromatic amino acid import in aging and identify a largely safe drug that extends lifespan across different kingdoms of life. Aging is the greatest risk factor for many diseases, which together account for the majority of global deaths and healthcare costs. Here we show that the common drug ibuprofen increases the lifespan of yeast, worms and flies, indicative of conserved longevity effects. In budding yeast, an excellent model of cellular longevity mechanisms, ibuprofen's pro-longevity action is independent of its known anti-inflammatory role. We show that the critical function of ibuprofen in longevity is to inhibit the uptake of aromatic amino acids, by destabilizing the high-affinity tryptophan permease. We further show that ibuprofen alters cell cycle progression. Mirroring the effects of ibuprofen, we found that most yeast long-lived mutants were also similarly affected in cell cycle progression. These findings identify a safe drug that extends the lifespan of divergent organisms and reveal fundamental cellular properties associated with longevity.
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Affiliation(s)
- Chong He
- Buck Institute for Research on Aging, Novato, California, United States of America
| | - Scott K. Tsuchiyama
- Buck Institute for Research on Aging, Novato, California, United States of America
| | - Quynh T. Nguyen
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas, United States of America
| | - Ekaterina N. Plyusnina
- Institute of Biology of Komi Science Center of Ural Branch of RAS, Syktyvkar, Russia
- Syktyvkar State University, Syktyvkar, Russia
| | - Samuel R. Terrill
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas, United States of America
| | - Sarah Sahibzada
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas, United States of America
| | - Bhumil Patel
- Buck Institute for Research on Aging, Novato, California, United States of America
| | - Alena R. Faulkner
- Buck Institute for Research on Aging, Novato, California, United States of America
| | - Mikhail V. Shaposhnikov
- Institute of Biology of Komi Science Center of Ural Branch of RAS, Syktyvkar, Russia
- Syktyvkar State University, Syktyvkar, Russia
| | - Ruilin Tian
- Buck Institute for Research on Aging, Novato, California, United States of America
| | - Mitsuhiro Tsuchiya
- Buck Institute for Research on Aging, Novato, California, United States of America
| | - Matt Kaeberlein
- Department of Pathology, University of Washington, Seattle, Washington, United States of America
| | - Alexey A. Moskalev
- Institute of Biology of Komi Science Center of Ural Branch of RAS, Syktyvkar, Russia
- Syktyvkar State University, Syktyvkar, Russia
- Moscow Institute of Physics and Technology (State University), Dolgoprudny, Russia
| | - Brian K. Kennedy
- Buck Institute for Research on Aging, Novato, California, United States of America
- * E-mail: (BKK); (MP)
| | - Michael Polymenis
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas, United States of America
- * E-mail: (BKK); (MP)
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Jaronen M, Quintana FJ. Immunological Relevance of the Coevolution of IDO1 and AHR. Front Immunol 2014; 5:521. [PMID: 25368620 PMCID: PMC4202789 DOI: 10.3389/fimmu.2014.00521] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 10/06/2014] [Indexed: 11/25/2022] Open
Abstract
The aryl hydrocarbon receptor (AHR) is a ligand-activated transcription factor initially identified because of its role in controlling the cellular response to environmental molecules. More recently, AHR has been shown to play a crucial role in controlling innate and adaptive immune responses through several mechanisms, one of which is the regulation of tryptophan metabolism. Indoleamine-2,3-dioxygenase (IDO) and tryptophan-2,3-dioxygenase (TDO) are considered rate-limiting enzymes in the tryptophan catabolism and play important roles in the regulation of the immunity. Moreover, AHR and IDO/TDO are closely interconnected: AHR regulates IDO and TDO expression, and kynurenine produced by IDO/TDO is an AHR agonist. In this review, we propose to examine the relationship between AHR and IDO/TDO and its relevance for the regulation of the immune response in health and disease.
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Affiliation(s)
- Merja Jaronen
- Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School , Boston, MA , USA
| | - Francisco J Quintana
- Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School , Boston, MA , USA
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Navrotskaya V, Oxenkrug G, Vorobyova L, Sharma H, Muresanu D, Summergrad P. Cerebrolysin Accelerates Metamorphosis and Attenuates Aging-Accelerating Effect of High Temperature in Drosophila Melanogaster. ACTA ACUST UNITED AC 2014; 6:65-68. [PMID: 25798213 DOI: 10.1166/ajnn.2014.1083] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Cerebrolysin® (CBL) is a neuroprotective drug used for the treatment of neurodegenerative diseases. CBL's mechanisms of action remain unclear. Involvement of tryptophan (TRP)-kynurenine (KYN) pathway in neuroprotective effect of CBL might be suggested considering that modulation of KYN pathway of TRP metabolism by CBL, and protection against eclosion defect and prolongation of life span of Drosophila melanogaster with pharmacologically or genetically-induced down-regulation of TRP conversion into KYN. To investigate possible involvement of TRP-KYN pathway in mechanisms of neuroprotective effect of CBL, we evaluated CBL effects on metamorphosis and life span of Drosophila melanogaster maintained at 23 °C and 28 °C ambient temperature. CBL accelerated metamorphosis, exerted strong tendency (p = 0.04) to prolong life span in female but not in male flies, and attenuated aging-accelerating effect of high (28 °C) ambient temperature in both female and male flies. Further research of CBL effects on metamorphosis and resistance to aging-accelerating effect of high temperature might offer new insights in mechanisms of its neuroprotective action and expand its clinical applications.
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Affiliation(s)
- V Navrotskaya
- Department of Genetics and Cytology, V. N. Karazin Kharkiv National University, Kharkiv, Ukraine
| | - G Oxenkrug
- Neuroinflammation Program, Department of Psychiatry, Tufts University/Tufts Medical Center, Boston, MA, USA
| | - L Vorobyova
- Department of Genetics and Cytology, V. N. Karazin Kharkiv National University, Kharkiv, Ukraine
| | - H Sharma
- Cerebrovascular Research Laboratory, Department of Surgical Sciences, Anesthesiology and Intensive Care Medicine, University Hospital, Uppsala University, Uppsala, Sweden
| | - D Muresanu
- Department of Neurology, University of Medicine and Pharmacy Iuliu Hatieganu, Cluj-Napoca, Romania
| | - P Summergrad
- Neuroinflammation Program, Department of Psychiatry, Tufts University/Tufts Medical Center, Boston, MA, USA
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Ott M, Litzenburger UM, Rauschenbach KJ, Bunse L, Ochs K, Sahm F, Pusch S, Opitz CA, Blaes J, von Deimling A, Wick W, Platten M. Suppression of TDO-mediated tryptophan catabolism in glioblastoma cells by a steroid-responsive FKBP52-dependent pathway. Glia 2014; 63:78-90. [PMID: 25132599 DOI: 10.1002/glia.22734] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Accepted: 07/17/2014] [Indexed: 02/04/2023]
Abstract
Tryptophan catabolism is increasingly recognized as a key and druggable molecular mechanism active in cancer, immune, and glioneural cells and involved in the modulation of antitumor immunity, autoimmunity and glioneural function. In addition to the pivotal rate limiting enzyme indoleamine-2,3-dioxygenase, expression of tryptophan-2,3-dioxygenase (TDO) has recently been described as an alternative pathway responsible for constitutive tryptophan degradation in malignant gliomas and other types of cancer. In addition, TDO has been implicated as a key regulator of neurotoxicity involved in neurodegenerative diseases and ageing. The pathways regulating TDO expression, however, are largely unknown. Here, a siRNA-based transcription factor profiling in human glioblastoma cells revealed that the expression of human TDO is suppressed by endogenous glucocorticoid signaling. Similarly, treatment of glioblastoma cells with the synthetic glucocorticoid dexamethasone led to a reduction of TDO expression and activity in vitro and in vivo. TDO inhibition was dependent on the immunophilin FKBP52, whose FK1 domain physically interacted with the glucocorticoid receptor as demonstrated by bimolecular fluorescence complementation and in situ proximity ligation assays. Accordingly, gene expression profile analyses revealed negative correlation of FKBP52 and TDO in glial and neural tumors and in normal brain. Knockdown of FKBP52 and treatment with the FK-binding immunosuppressant FK506 enhanced TDO expression and activity in glioblastoma cells. In summary, we identify a novel steroid-responsive FKBP52-dependent pathway suppressing the expression and activity of TDO, a central and rate-limiting enzyme in tryptophan metabolism, in human gliomas.
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Affiliation(s)
- Martina Ott
- German Cancer Consortium (DKTK) Clinical Cooperation Unit Neuroimmunology and Brain Tumor Immunology, German Cancer Research Center (DKFZ), Heidelberg, Germany; Department of Neurooncology, University Hospital Heidelberg and National Center for Tumor Diseases, Heidelberg, Germany
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Liu SH, Yao J, Yao HW, Jiang PL, Yang BJ, Tang J. Biological and biochemical characterization of a red-eye mutant in Nilaparvata lugens (Hemiptera: Delphacidae). INSECT SCIENCE 2014; 21:469-476. [PMID: 23955841 DOI: 10.1111/1744-7917.12049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/14/2013] [Indexed: 06/02/2023]
Abstract
A red-eye colony was established in our laboratory in brown planthopper (BPH), Nilaparvata lugens (Stål), a major rice pest in Asia. Except for the red-eye phenotype, no other differences were observed between the wild-type (brown eye) and the mutant-type (red eye) in external characters. Genetic analysis revealed that the red-eye phenotype was controlled by a single autosomal recessive allele. Biological studies found that egg production and egg viability in the red-eye mutant colony were not significantly different from those in the wild-type BPH. Biochemical analysis and electronic microscopy examination revealed that the red-eye mutants contained decreased levels of both xanthommatin (brown) and pteridine (red) and reduced number of pigment granules. Thus, the changes of amount and ratio of the two pigments is the biochemical basis of this red-eye mutation. Our results indicate that the red-eye mutant gene (red) might be involved in one common gene locus shared by the two pigments in pigment transportation, pigment granule formation or some other processes.
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Affiliation(s)
- Shu-Hua Liu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou
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Hoffman JM, Soltow QA, Li S, Sidik A, Jones DP, Promislow DEL. Effects of age, sex, and genotype on high-sensitivity metabolomic profiles in the fruit fly, Drosophila melanogaster. Aging Cell 2014; 13:596-604. [PMID: 24636523 PMCID: PMC4116462 DOI: 10.1111/acel.12215] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/25/2014] [Indexed: 12/24/2022] Open
Abstract
Researchers have used whole-genome sequencing and gene expression profiling to identify genes associated with age, in the hope of understanding the underlying mechanisms of senescence. But there is a substantial gap from variation in gene sequences and expression levels to variation in age or life expectancy. In an attempt to bridge this gap, here we describe the effects of age, sex, genotype, and their interactions on high-sensitivity metabolomic profiles in the fruit fly, Drosophila melanogaster. Among the 6800 features analyzed, we found that over one-quarter of all metabolites were significantly associated with age, sex, genotype, or their interactions, and multivariate analysis shows that individual metabolomic profiles are highly predictive of these traits. Using a metabolomic equivalent of gene set enrichment analysis, we identified numerous metabolic pathways that were enriched among metabolites associated with age, sex, and genotype, including pathways involving sugar and glycerophospholipid metabolism, neurotransmitters, amino acids, and the carnitine shuttle. Our results suggest that high-sensitivity metabolomic studies have excellent potential not only to reveal mechanisms that lead to senescence, but also to help us understand differences in patterns of aging among genotypes and between males and females.
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Affiliation(s)
| | - Quinlyn A. Soltow
- Division of Pulmonary Allergy & Critical Care Medicine Department of Medicine Emory University Atlanta GA 30322USA
- Department of Medicine Clinical Biomarkers Laboratory Emory University Atlanta GA 30322USA
- ClinMet Inc. 3210 Merryfield Row San Diego CA 92121USA
| | - Shuzhao Li
- Division of Pulmonary Allergy & Critical Care Medicine Department of Medicine Emory University Atlanta GA 30322USA
| | - Alfire Sidik
- Department of Genetics University of Georgia Athens GA 30602USA
| | - Dean P. Jones
- Division of Pulmonary Allergy & Critical Care Medicine Department of Medicine Emory University Atlanta GA 30322USA
- Department of Medicine Clinical Biomarkers Laboratory Emory University Atlanta GA 30322USA
- Center for Health Discovery & Well Being Emory University Atlanta GA 30322 USA
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Avanesov AS, Ma S, Pierce KA, Yim SH, Lee BC, Clish CB, Gladyshev VN. Age- and diet-associated metabolome remodeling characterizes the aging process driven by damage accumulation. eLife 2014; 3:e02077. [PMID: 24843015 PMCID: PMC4003482 DOI: 10.7554/elife.02077] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Aging is thought to be associated with increased molecular damage, but representative markers vary across conditions and organisms, making it difficult to assess properties of cumulative damage throughout lifespan. We used nontargeted metabolite profiling to follow age-associated trajectories of >15,000 metabolites in Drosophila subjected to control and lifespan-extending diets. We find that aging is associated with increased metabolite diversity and low-abundance molecules, suggesting they include cumulative damage. Remarkably, the number of detected compounds leveled-off in late-life, and this pattern associated with survivorship. Fourteen percent of metabolites showed age-associated changes, which decelerated in late-life and long-lived flies. In contrast, known metabolites changed in abundance similarly to nontargeted metabolites and transcripts, but did not increase in diversity. Targeted profiling also revealed slower metabolism and accumulation of lifespan-limiting molecules. Thus, aging is characterized by gradual metabolome remodeling, and condition- and advanced age-associated deceleration of this remodeling is linked to mortality and molecular damage.DOI: http://dx.doi.org/10.7554/eLife.02077.001.
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Affiliation(s)
- Andrei S Avanesov
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, United States
| | - Siming Ma
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, United States
| | | | - Sun Hee Yim
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, United States
| | - Byung Cheon Lee
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, United States
| | | | - Vadim N Gladyshev
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, United States Broad Institute, Cambridge, United States
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Navrotskaya V, Oxenkrug G, Vorobyova L, Summergrad P. Berberine Attenuated Aging-Accelerating Effect of High Temperature in Drosophila Model. ACTA ACUST UNITED AC 2014; 5:275-278. [PMID: 26167393 PMCID: PMC4498585 DOI: 10.4236/ajps.2014.53037] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We have observed that berberine prolonged life span and improved viability of pupae and climbing activity of imagoes of wild-type Drosophila melanogaster maintained at 23°C. As a continuation of our studies of berberine effect on life span, we were interested to evaluate the effect of berberine of life span in flies maintained at a higher temperature (28°C) known to accelerate aging in wild type flies. Considering that genetically or pharmacologically induced deficiency of TRP conversion into KYN prolonged life span in a Drosophila model, we compared the effects of berberine, a powerful inhibitor of kynurenine (KYN) formation from tryptophan (TRP), on life span in wild type and in Drosophila melanogaster mutants (vermilion) with deficient TRP-KYN metabolism maintained at 23°C and 28°C. High (28°C) ambient temperature decreased life span in both wild type and vermilion flies. Aging accelerating effect of high temperature was more pronounced in Oregon than in vermilion flies (-60% vs. -40% decrease of mean life span, resp). Berberine attenuated the aging-accelerating effect of high temperature. Effect of berberine was more pronounced in Oregon (+46%) than in vermilion (+22%) flies. The obtained data suggested the possible involvement of TRP-KYN metabolism in the aging-acceleration effect of the high temperature and in protective effect of berberine.
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Affiliation(s)
| | - Gregory Oxenkrug
- Tufts University School of Medicine, Tufts Medical Center, Boston, USA
| | | | - Paul Summergrad
- Tufts University School of Medicine, Tufts Medical Center, Boston, USA
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Oxenkrug G. Serotonin-kynurenine hypothesis of depression: historical overview and recent developments. Curr Drug Targets 2013; 14:514-21. [PMID: 23514379 DOI: 10.2174/1389450111314050002] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Revised: 03/14/2013] [Accepted: 03/15/2013] [Indexed: 12/17/2022]
Abstract
This mini-review focuses on the studies of late Prof. IP Lapin (1903 - 2012) and his research team on the role of methoxyindole and kynurenine (KYN) pathways of tryptophan (TRP) metabolism in the pathogenesis of depression and action mechanisms of antidepressant effect. In the late 60s of the last century Prof. IP Lapin suggested that "intensification of central serotoninergic processes is a determinant of the thymoleptic (mood elevating) component" while "activation of noradrenergic processes is responsible for psychoenergetic and motor-stimulating component of the clinical antidepressant effect". The cause of serotonin deficiency in depression was attributed to the shunt of TRP "metabolism away from serotonin production towards KYN production" due to cortisol-induced activation of liver enzyme, tryptophan 2,3- dioxygenase, the rate-limiting enzyme of TRP - KYN pathway. Prof. Lapin suggested and discovered that KYN and its metabolites affect brain functions, and proposed the role of neurokynurenines in pathogenesis of depression and action mechanisms of antidepressant effect (kynurenine hypothesis). Further research suggested the antidepressant and cognition- enhancing effects of post-serotonin metabolite, N-acetylserotonin (NAS), an agonist to tyrosine kinase B (TrkB) receptor; and link between depression and chronic inflammation-associated disorders (e.g., insulin resistance, hepatitis C virus) via inflammation-induced activation of indoleamine 2,3- dioxygenase, brain located rate-limiting enzyme of TRY - KYN metabolism. NAS and kynurenines might be the targets for prevention and treatment of depression and associated conditions.
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Affiliation(s)
- Gregory Oxenkrug
- Department of Psychiatry, Tufts University School of Medicine, Director, Psychiatry and Inflammation Program, Tufts Medical Center, Boston, MA 02111, USA.
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Coburn C, Gems D. The mysterious case of the C. elegans gut granule: death fluorescence, anthranilic acid and the kynurenine pathway. Front Genet 2013; 4:151. [PMID: 23967012 PMCID: PMC3735983 DOI: 10.3389/fgene.2013.00151] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Accepted: 07/21/2013] [Indexed: 12/31/2022] Open
Abstract
Gut granules are lysosome-like organelles with acidic interiors that are found in large numbers within the intestine of the nematode Caenorhabditis elegans. They are particularly prominent when viewed under ultraviolet light, which causes them to emit intense blue fluorescence. Yet the function of these large and abundant organelles in this heavily-studied model organism remains unclear. One possibility is that they serve as storage organelles, for example of zinc. A new clue to gut granule function is the identification of the blue fluorescent material that they contain as a glycosylated form of anthranilic acid, which is derived from tryptophan by action of the kynurenine pathway. This compound can also serve a surprising role as a natural, endogenous marker of organismal death.
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Affiliation(s)
| | - David Gems
- Institute of Healthy Ageing, and Department of Genetics, Evolution and Environment, University College LondonLondon, UK
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Navrotskaya VV, Oxenkrug G, Vorobyova LI, Summergrad P. Berberine Prolongs Life Span and Stimulates Locomotor Activity of Drosophila melanogaster. ACTA ACUST UNITED AC 2012; 3:1037-1040. [PMID: 26167392 DOI: 10.4236/ajps.2012.327123] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Drosophila melanogaster mutants with deficient kynurenine (KYN) formation from tryptophan (TRP) have longer life span than wild type flies. Administration of alpha-methyl-TRP and 5-methyl-TRY, the inhibitors of TRP-KYN metabolism, prolonged life span in wild-type flies. Both inhibitors are not available for human use. Berberine, an isoquinoline alkaloid isolated from Berberis aristata, is known as the herb widely used in traditional Chinese and Indian medicine. Berberin is a strong inhibitor of the enzyme catalyzing TRP conversion into KYN. Considering this particular feature we investigated the effect of berberine on life- and health-span in wild-type Drosophila melanogaster. The results of our study showed that Berberine extended mean, median and maximum life span of female flies. Berberine did not affect the number of pupae of filial generation and decreased their lethality. Berberine increased locomotor activity (vertical climbing). The results of the study suggest that berberine prolongs life- and improves health-span of Drosophila melanogaster. Berberine might be a candidate drug for prevention and treatment of aging and aging-associated medical and psychiatric disorders.
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Affiliation(s)
| | - G Oxenkrug
- Tufts University, Tufts Medical Center, Boston, USA
| | - L I Vorobyova
- V. N. Karazin Kharkiv National University, Kharkiv, Ukraine
| | - P Summergrad
- Tufts University, Tufts Medical Center, Boston, USA
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