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Hu Y, Aljumaah MR, Azcarate-Peril MA. Galacto-oligosaccharides (GOS) and the Elderly Gut: Implications for Immune Restoration and Health. Adv Nutr 2024:100263. [PMID: 38897384 DOI: 10.1016/j.advnut.2024.100263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 04/23/2024] [Accepted: 06/13/2024] [Indexed: 06/21/2024] Open
Abstract
The increasing prevalence of non-communicable diseases in the aging population has been correlated with a decline in innate and adaptive immune responses; hence, it is imperative to identify approaches to improve immune function, prevent related disorders, and reduce or treat age-associated health complications. Prebiotic supplementation is a promising approach to modulating the gut microbiome and immune system, offering a potential strategy to maintain the integrity of immune function in older individuals. This review summarizes the current research on prebiotic galacto-oligosaccharides (GOS) immunomodulatory mechanisms mediated by bacterial-derived metabolites, including short-chain fatty acids (SCFAs) and secondary bile acids, to maintain immune homeostasis. The potential applications of GOS as immunotherapy for age-related disease prevention in older individuals are also highlighted. This aligns with the global shift towards proactive healthcare and emphasizes the significance of early intervention in directing an individual's health trajectory. STATEMENT OF SIGNIFICANCE: The review provides compelling evidence that GOS, as a dietary intervention, can significantly enhance gut health and immunomodulation in older adults. Based on these findings, the review urges further research to advance our comprehension of GOS and its potential to optimize the health of older individuals.
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Affiliation(s)
- Yunan Hu
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA; UNC Microbiome Core, Center for Gastrointestinal Biology and Disease (CGIBD), School of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Mashael R Aljumaah
- UNC Microbiome Core, Center for Gastrointestinal Biology and Disease (CGIBD), School of Medicine, University of North Carolina, Chapel Hill, NC, USA; Department of Plant and Microbial Biology, North Carolina State University, NC, Raleigh, USA; Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - M Andrea Azcarate-Peril
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA; UNC Microbiome Core, Center for Gastrointestinal Biology and Disease (CGIBD), School of Medicine, University of North Carolina, Chapel Hill, NC, USA.
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2
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Nigg JC, Castelló-Sanjuán M, Blanc H, Frangeul L, Mongelli V, Godron X, Bardin AJ, Saleh MC. Viral infection disrupts intestinal homeostasis via Sting-dependent NF-κB signaling in Drosophila. Curr Biol 2024:S0960-9822(24)00607-9. [PMID: 38823381 DOI: 10.1016/j.cub.2024.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 04/11/2024] [Accepted: 05/07/2024] [Indexed: 06/03/2024]
Abstract
Host-microbe interactions influence intestinal stem cell (ISC) activity to modulate epithelial turnover and composition. Here, we investigated the functional impacts of viral infection on intestinal homeostasis and the mechanisms by which viral infection alters ISC activity. We report that Drosophila A virus (DAV) infection disrupts intestinal homeostasis in Drosophila by inducing sustained ISC proliferation, resulting in intestinal dysplasia, loss of gut barrier function, and reduced lifespan. We found that additional viruses common in laboratory-reared Drosophila also promote ISC proliferation. The mechanism of DAV-induced ISC proliferation involves progenitor-autonomous epidermal growth factor receptor (EGFR) signaling, c-Jun N-terminal kinase (JNK) activity in enterocytes, and requires Sting-dependent nuclear factor κB (NF-κB) (Relish) activity. We further demonstrate that activating Sting-Relish signaling is sufficient to induce ISC proliferation, promote intestinal dysplasia, and reduce lifespan in the absence of infection. Our results reveal that viral infection can significantly disrupt intestinal physiology, highlight a novel role for Sting-Relish signaling, and support a role for viral infection in aging.
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Affiliation(s)
- Jared C Nigg
- Institut Pasteur, Université Paris Cité, CNRS UMR3569, Viruses and RNA Interference Unit, 75015 Paris, France
| | - Mauro Castelló-Sanjuán
- Institut Pasteur, Université Paris Cité, CNRS UMR3569, Viruses and RNA Interference Unit, 75015 Paris, France
| | - Hervé Blanc
- Institut Pasteur, Université Paris Cité, CNRS UMR3569, Viruses and RNA Interference Unit, 75015 Paris, France
| | - Lionel Frangeul
- Institut Pasteur, Université Paris Cité, CNRS UMR3569, Viruses and RNA Interference Unit, 75015 Paris, France
| | - Vanesa Mongelli
- Institut Pasteur, Université Paris Cité, CNRS UMR3569, Viruses and RNA Interference Unit, 75015 Paris, France
| | - Xavier Godron
- DNA Script SAS, 67 Avenue de Fontainebleau, 94270 Le Kremlin-Bicêtre, France
| | - Allison J Bardin
- Institut Curie, Université PSL, Sorbonne Université, CNRS UMR3215, INSERM U934, Genetics and Developmental Biology, 75005 Paris, France
| | - Maria-Carla Saleh
- Institut Pasteur, Université Paris Cité, CNRS UMR3569, Viruses and RNA Interference Unit, 75015 Paris, France.
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3
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Khan N, Kurnik-Łucka M, Latacz G, Gil K. Systematic-Narrative Hybrid Literature Review: Crosstalk between Gastrointestinal Renin-Angiotensin and Dopaminergic Systems in the Regulation of Intestinal Permeability by Tight Junctions. Int J Mol Sci 2024; 25:5566. [PMID: 38791603 PMCID: PMC11122119 DOI: 10.3390/ijms25105566] [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: 04/17/2024] [Revised: 05/12/2024] [Accepted: 05/18/2024] [Indexed: 05/26/2024] Open
Abstract
In the first part of this article, the role of intestinal epithelial tight junctions (TJs), together with gastrointestinal dopaminergic and renin-angiotensin systems, are narratively reviewed to provide sufficient background. In the second part, the current experimental data on the interplay between gastrointestinal (GI) dopaminergic and renin-angiotensin systems in the regulation of intestinal epithelial permeability are reviewed in a systematic manner using the PRISMA methodology. Experimental data confirmed the copresence of DOPA decarboxylase (DDC) and angiotensin converting enzyme 2 (ACE2) in human and rodent enterocytes. The intestinal barrier structure and integrity can be altered by angiotensin (1-7) and dopamine (DA). Both renin-angiotensin and dopaminergic systems influence intestinal Na+/K+-ATPase activity, thus maintaining electrolyte and nutritional homeostasis. The colocalization of B0AT1 and ACE2 indicates the direct role of the renin-angiotensin system in amino acid absorption. Yet, more studies are needed to thoroughly define the structural and functional interaction between TJ-associated proteins and GI renin-angiotensin and dopaminergic systems.
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Affiliation(s)
- Nadia Khan
- Faculty of Medicine, Department of Pathophysiology, Jagiellonian University Medical College, Czysta 18, 31-121 Krakow, Poland
- Faculty of Pharmacy, Department of Technology and Biotechnology of Drugs, Jagiellonian University Medical College, Medyczna 9, 31-008 Krakow, Poland
| | - Magdalena Kurnik-Łucka
- Faculty of Medicine, Department of Pathophysiology, Jagiellonian University Medical College, Czysta 18, 31-121 Krakow, Poland
| | - Gniewomir Latacz
- Faculty of Pharmacy, Department of Technology and Biotechnology of Drugs, Jagiellonian University Medical College, Medyczna 9, 31-008 Krakow, Poland
| | - Krzysztof Gil
- Faculty of Medicine, Department of Pathophysiology, Jagiellonian University Medical College, Czysta 18, 31-121 Krakow, Poland
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4
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Suntornsaratoon P, Antonio JM, Flores J, Upadhyay R, Veltri J, Bandyopadhyay S, Dadala R, Kim M, Liu Y, Balasubramanian I, Turner JR, Su X, Li WV, Gao N, Ferraris RP. Lactobacillus rhamnosus GG Stimulates Dietary Tryptophan-Dependent Production of Barrier-Protecting Methylnicotinamide. Cell Mol Gastroenterol Hepatol 2024; 18:101346. [PMID: 38641207 PMCID: PMC11193042 DOI: 10.1016/j.jcmgh.2024.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 04/10/2024] [Accepted: 04/11/2024] [Indexed: 04/21/2024]
Abstract
BACKGROUND & AIMS Lacticaseibacillus rhamnosus GG (LGG) is the world's most consumed probiotic but its mechanism of action on intestinal permeability and differentiation along with its interactions with an essential source of signaling metabolites, dietary tryptophan (trp), are unclear. METHODS Untargeted metabolomic and transcriptomic analyses were performed in LGG monocolonized germ-free mice fed trp-free or -sufficient diets. LGG-derived metabolites were profiled in vitro under anaerobic and aerobic conditions. Multiomic correlations using a newly developed algorithm discovered novel metabolites tightly linked to tight junction and cell differentiation genes whose abundances were regulated by LGG and dietary trp. Barrier-modulation by these metabolites were functionally tested in Caco2 cells, mouse enteroids, and dextran sulfate sodium experimental colitis. The contribution of these metabolites to barrier protection is delineated at specific tight junction proteins and enterocyte-promoting factors with gain and loss of function approaches. RESULTS LGG, strictly with dietary trp, promotes the enterocyte program and expression of tight junction genes, particularly Ocln. Functional evaluations of fecal and serum metabolites synergistically stimulated by LGG and trp revealed a novel vitamin B3 metabolism pathway, with methylnicotinamide (MNA) unexpectedly being the most robust barrier-protective metabolite in vitro and in vivo. Reduced serum MNA is significantly associated with increased disease activity in patients with inflammatory bowel disease. Exogenous MNA enhances gut barrier in homeostasis and robustly promotes colonic healing in dextran sulfate sodium colitis. MNA is sufficient to promote intestinal epithelial Ocln and RNF43, a master inhibitor of Wnt. Blocking trp or vitamin B3 absorption abolishes barrier recovery in vivo. CONCLUSIONS Our study uncovers a novel LGG-regulated dietary trp-dependent production of MNA that protects the gut barrier against colitis.
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Affiliation(s)
- Panan Suntornsaratoon
- Department of Pharmacology, Physiology and Neurosciences, New Jersey Medical School, Rutgers University, Newark, New Jersey; Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Jayson M Antonio
- Department of Pharmacology, Physiology and Neurosciences, New Jersey Medical School, Rutgers University, Newark, New Jersey
| | - Juan Flores
- Department of Biological Sciences, Rutgers University, Newark, New Jersey
| | - Ravij Upadhyay
- Department of Pharmacology, Physiology and Neurosciences, New Jersey Medical School, Rutgers University, Newark, New Jersey
| | - John Veltri
- Department of Pharmacology, Physiology and Neurosciences, New Jersey Medical School, Rutgers University, Newark, New Jersey
| | | | - Rhema Dadala
- Department of Pharmacology, Physiology and Neurosciences, New Jersey Medical School, Rutgers University, Newark, New Jersey
| | - Michael Kim
- Department of Pharmacology, Physiology and Neurosciences, New Jersey Medical School, Rutgers University, Newark, New Jersey
| | - Yue Liu
- Department of Biological Sciences, Rutgers University, Newark, New Jersey
| | | | - Jerrold R Turner
- Laboratory of Mucosal Barrier Pathobiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Xiaoyang Su
- Department of Medicine, Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey
| | - Wei Vivian Li
- Department of Statistics, University of California, Riverside, Riverside, California
| | - Nan Gao
- Department of Pharmacology, Physiology and Neurosciences, New Jersey Medical School, Rutgers University, Newark, New Jersey; Department of Biological Sciences, Rutgers University, Newark, New Jersey.
| | - Ronaldo P Ferraris
- Department of Pharmacology, Physiology and Neurosciences, New Jersey Medical School, Rutgers University, Newark, New Jersey.
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5
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Papila B, Karimova A, Onaran I. Altered lactate/pyruvate ratio may be responsible for aging-associated intestinal barrier dysfunction in male rats. Biogerontology 2024:10.1007/s10522-024-10102-0. [PMID: 38619668 DOI: 10.1007/s10522-024-10102-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 02/29/2024] [Indexed: 04/16/2024]
Abstract
Some evidence points to a link between aging-related increased intestinal permeability and mitochondrial dysfunction in in-vivo models. Several studies have also demonstrated age-related accumulation of the of specific deletion 4834-bp of "common" mitochondrial DNA (mtDNA) in various rat tissues and suggest that this deletion may disrupt mitochondrial metabolism. The present study aimed to investigate possible associations among the mitochondrial DNA (mtDNA) common deletion, mitochondrial function, intestinal permeability, and aging in rats. The study was performed on the intestinal tissue from (24 months) and young (4 months) rats. mtDNA4834 deletion, mtDNA copy number, mitochondrial membrane potential, and ATP, lactate and pyruvate levels were analyzed in tissue samples. Zonulin and intestinal fatty acid-binding protein (I-FABP) levels were also evaluated in serum. Serum zonulin and I-FABP levels were significantly higher in 24-month-old rats than 4-month-old rats (p = 0.04, p = 0.026, respectively). There is not significant difference in mtDNA4834 copy levels was observed between the old and young intestinal tissues (p > 0.05). The intestinal mitochondrial DNA copy number was similar between the two age groups (p > 0.05). No significant difference was observed in ATP levels in the intestinal tissue lysates between old and young rats (p > 0.05). ATP levels in isolated mitochondria from both groups were also similar. Analysis of MMP using JC-10 in intestinal tissue mitochondria showed that mitochondrial membrane potentials (red/green ratios) were similar between the two age groups (p > 0.05). Pyruvate tended to be higher in the 24-month-old rat group and the L/P ratio was found to be approximately threefold lower in the intestinal tissue of the older rats compared to the younger rats (p < 0.002). The tissue lactate/pyruvate ratio (L/P) was three times lower in old rats than in young rats. Additionally, there were significant negative correlations between intestinal permeability parameters and L/P ratios. The intestinal tissues of aged rats are not prone to accumulate mtDNA common deletion, we suggest that this mutation does not explain the age-related increase in intestinal permeability. It seems to be more likely that altered glycolytic capacity could be a link to increased intestinal permeability with age. This observation strengthens assertions that the balance between glycolysis and mitochondrial metabolism may play a critical role in intestinal barrier functions.
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Affiliation(s)
- Berrin Papila
- Department of General Surgery, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Cerrahpasa, Fatih, 34098, Istanbul, Turkey.
| | - Ayla Karimova
- Department of Medical Biology and Genetics, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Ilhan Onaran
- Department of Medical Biology and Genetics, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
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Yuan Q, Luo M, Xie Y, Song W, Wang Y, Deng D, Chen S, Guo H. Chronic trans fatty acid consumption shortens lifespan in male Drosophila melanogaster on a high-sugar and high-fat diet. Biogerontology 2024:10.1007/s10522-024-10101-1. [PMID: 38582786 DOI: 10.1007/s10522-024-10101-1] [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: 01/18/2024] [Accepted: 02/21/2024] [Indexed: 04/08/2024]
Abstract
Aging entails the progressive decline in the body's self-regulation and functionality over time. Notably, obesity and aging exhibit parallel phenotypes, with obesity further accelerating the aging process across multiple dimensions and diminishing lifespan. In this study, we explored the impact of trans fatty acid (TFA) consumption on the overall health and lifespan of male Drosophila melanogaster under an isocaloric high-sugar and high-fat diet. Our results indicate that TFA intake results in a shortened lifespan, elevated body weight, and increased triglyceride levels in flies fed a high-sugar and high-fat diet with equivalent caloric intake. Additionally, TFA exposure induces oxidative stress, locomotor deficits, and damage to the intestinal barrier in flies. Collectively, chronic TFA consumption expedites the aging process and reduces the lifespan of male Drosophila melanogaster. These results contribute supplementary evidence regarding the adverse health effects associated with TFAs.
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Affiliation(s)
- Qianhua Yuan
- Department of Nutrition, School of Public Health, Guangdong Medical University, Dongguan, 523808, China
| | - Mengliu Luo
- Department of Nutrition, School of Public Health, Guangdong Medical University, Dongguan, 523808, China
| | - Yutong Xie
- Department of Nutrition, School of Public Health, Guangdong Medical University, Dongguan, 523808, China
| | - Wanhan Song
- Department of Nutrition, School of Public Health, Guangdong Medical University, Dongguan, 523808, China
| | - Ya Wang
- Department of Nutrition, School of Public Health, Guangdong Medical University, Dongguan, 523808, China
| | - Dazhang Deng
- Department of Nutrition, School of Public Health, Guangdong Medical University, Dongguan, 523808, China
| | - Shuyan Chen
- Department of Nutrition, School of Public Health, Guangdong Medical University, Dongguan, 523808, China
| | - Honghui Guo
- Department of Nutrition, School of Public Health, Guangdong Medical University, Dongguan, 523808, China.
- Dongguan Key Laboratory of Prevention and Treatment of Chronic Noncommunicable Diseases, School of Public Health, Guangdong Medical University, Dongguan, 523808, China.
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Gu Y, Gao L, He J, Luo M, Hu M, Lin Y, Li J, Hou T, Si J, Yu Y. β-Nicotinamide mononucleotide supplementation prolongs the lifespan of prematurely aged mice and protects colon function in ageing mice. Food Funct 2024; 15:3199-3213. [PMID: 38445897 DOI: 10.1039/d3fo05221d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
Ageing is defined as the degeneration of physiological functions in numerous tissues and organs of an organism, which occurs with age. As we age, the gut undergoes a series of changes and weaknesses that may contribute to overall ageing. Emerging evidence suggests that β-nicotinamide mononucleotide (NMN) plays a role in regulating intestinal function, but there is still a lack of literature on its role in maintaining the colon health of ageing mice. In our research, Zmpste24-/- mice proved that NMN prolonged their life span and delayed senescence. This study was designed to investigate the effects of long-term intervention on regulating colon function in ageing mice. Our results indicated that NMN improved the pathology of intestinal epithelial cells and intestinal permeability by upregulating the expression of intestinal tight junction proteins and the number of goblet cells, increasing the release of anti-inflammatory factors, and increasing beneficial intestinal bacteria. NMN increased the expression of the proteins SIRT1, NMNAT2, and NMNAT3 and decreased the expression of the protein P53. It also regulated the activity of ISCs by increasing Wnt/β-catenin and Lgr5. Our findings also revealed that NMN caused a significant increase in the relative abundance of Akkermansia muciniphila and Bifidobacterium pseudolongum and notable differences in metabolic pathways related to choline metabolism in cancer. In summary, NMN supplementation can delay frailty in old age, aid healthy ageing, and delay gut ageing.
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Affiliation(s)
- Yanrou Gu
- Department of Gastroenterology, The Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou325035, China.
| | - Lidan Gao
- Department of Scientific Research Center, The Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou Maternal and Child Health Care Hospital, Wenzhou325035, China
| | - Jiamin He
- Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou310058, China.
- Institution of Gastroenterology, Zhejiang University, Hangzhou310058, China
- Prevention and Treatment Research Center for Senescent Disease, Zhejiang University School of Medicine, Hangzhou310058, China
| | - Man Luo
- Department of Clinical Nutrition, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou310058, China
| | - Mei Hu
- Department of Gastroenterology, The Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou325035, China.
| | - Yuxian Lin
- Department of Gastroenterology, The Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou325035, China.
| | - Jianxin Li
- Department of Gastroenterology, The Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou325035, China.
| | - Tongyao Hou
- Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou310058, China.
- Institution of Gastroenterology, Zhejiang University, Hangzhou310058, China
| | - Jianmin Si
- Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou310058, China.
- Institution of Gastroenterology, Zhejiang University, Hangzhou310058, China
- Prevention and Treatment Research Center for Senescent Disease, Zhejiang University School of Medicine, Hangzhou310058, China
| | - Yingcong Yu
- Department of Gastroenterology, The Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People's Hospital, Wenzhou325035, China.
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Scorza C, Goncalves V, Finsterer J, Scorza F, Fonseca F. Exploring the Prospective Role of Propolis in Modifying Aging Hallmarks. Cells 2024; 13:390. [PMID: 38474354 DOI: 10.3390/cells13050390] [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: 12/28/2023] [Revised: 02/18/2024] [Accepted: 02/22/2024] [Indexed: 03/14/2024] Open
Abstract
Aging populations worldwide are placing age-related diseases at the forefront of the research agenda. The therapeutic potential of natural substances, especially propolis and its components, has led to these products being promising agents for alleviating several cellular and molecular-level changes associated with age-related diseases. With this in mind, scientists have introduced a contextual framework to guide future aging research, called the hallmarks of aging. This framework encompasses various mechanisms including genomic instability, epigenetic changes, mitochondrial dysfunction, inflammation, impaired nutrient sensing, and altered intercellular communication. Propolis, with its rich array of bioactive compounds, functions as a potent functional food, modulating metabolism, gut microbiota, inflammation, and immune response, offering significant health benefits. Studies emphasize propolis' properties, such as antitumor, cardioprotective, and neuroprotective effects, as well as its ability to mitigate inflammation, oxidative stress, DNA damage, and pathogenic gut bacteria growth. This article underscores current scientific evidence supporting propolis' role in controlling molecular and cellular characteristics linked to aging and its hallmarks, hypothesizing its potential in geroscience research. The aim is to discover novel therapeutic strategies to improve health and quality of life in older individuals, addressing existing deficits and perspectives in this research area.
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Affiliation(s)
- Carla Scorza
- Disciplina de Neurociência, Departamento de Neurologia e Neurocirurgia, Universidade Federal de São Paulo (UNIFESP), São Paulo 04039-032, Brazil
| | - Valeria Goncalves
- Disciplina de Neurociência, Departamento de Neurologia e Neurocirurgia, Universidade Federal de São Paulo (UNIFESP), São Paulo 04039-032, Brazil
| | | | - Fúlvio Scorza
- Disciplina de Neurociência, Departamento de Neurologia e Neurocirurgia, Universidade Federal de São Paulo (UNIFESP), São Paulo 04039-032, Brazil
| | - Fernando Fonseca
- Laboratório de Análises Clínicas da Faculdade de Medicina do ABC, Santo André 09060-650, Brazil
- Departamento de Ciencias Farmaceuticas, Universidade Federal de Sao Paulo (UNIFESP), Diadema 09972-270, Brazil
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9
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Ureña E, Xu B, Regan JC, Atilano ML, Minkley LJ, Filer D, Lu YX, Bolukbasi E, Khericha M, Alic N, Partridge L. Trametinib ameliorates aging-associated gut pathology in Drosophila females by reducing Pol III activity in intestinal stem cells. Proc Natl Acad Sci U S A 2024; 121:e2311313121. [PMID: 38241436 PMCID: PMC10823232 DOI: 10.1073/pnas.2311313121] [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: 07/12/2023] [Accepted: 11/17/2023] [Indexed: 01/21/2024] Open
Abstract
Pharmacological therapies are promising interventions to slow down aging and reduce multimorbidity in the elderly. Studies in animal models are the first step toward translation of candidate molecules into human therapies, as they aim to elucidate the molecular pathways, cellular mechanisms, and tissue pathologies involved in the anti-aging effects. Trametinib, an allosteric inhibitor of MEK within the Ras/MAPK (Ras/Mitogen-Activated Protein Kinase) pathway and currently used as an anti-cancer treatment, emerged as a geroprotector candidate because it extended lifespan in the fruit fly Drosophila melanogaster. Here, we confirm that trametinib consistently and robustly extends female lifespan, and reduces intestinal stem cell (ISC) proliferation, tumor formation, tissue dysplasia, and barrier disruption in guts in aged flies. In contrast, pro-longevity effects of trametinib are weak and inconsistent in males, and it does not influence gut homeostasis. Inhibition of the Ras/MAPK pathway specifically in ISCs is sufficient to partially recapitulate the effects of trametinib. Moreover, in ISCs, trametinib decreases the activity of the RNA polymerase III (Pol III), a conserved enzyme synthesizing transfer RNAs and other short, non-coding RNAs, and whose inhibition also extends lifespan and reduces gut pathology. Finally, we show that the pro-longevity effect of trametinib in ISCs is partially mediated by Maf1, a repressor of Pol III, suggesting a life-limiting Ras/MAPK-Maf1-Pol III axis in these cells. The mechanism of action described in this work paves the way for further studies on the anti-aging effects of trametinib in mammals and shows its potential for clinical application in humans.
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Affiliation(s)
- Enric Ureña
- Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, LondonWC1E 7JE, United Kingdom
| | - Bowen Xu
- Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, LondonWC1E 7JE, United Kingdom
| | - Jennifer C. Regan
- Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, LondonWC1E 7JE, United Kingdom
| | - Magda L. Atilano
- Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, LondonWC1E 7JE, United Kingdom
| | - Lucy J. Minkley
- Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, LondonWC1E 7JE, United Kingdom
| | - Danny Filer
- Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, LondonWC1E 7JE, United Kingdom
| | - Yu-Xuan Lu
- Max Planck Institute for Biology of Ageing, CologneD-50931, Germany
| | - Ekin Bolukbasi
- Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, LondonWC1E 7JE, United Kingdom
| | - Mobina Khericha
- Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, LondonWC1E 7JE, United Kingdom
| | - Nazif Alic
- Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, LondonWC1E 7JE, United Kingdom
| | - Linda Partridge
- Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, LondonWC1E 7JE, United Kingdom
- Max Planck Institute for Biology of Ageing, CologneD-50931, Germany
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10
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Zhang S, Li M, Chang L, Mao X, Jiang Y, Shen X, Niu K, Lu X, Zhang R, Song Y, Ma K, Li H, Wei C, Hou Y, Wu Y. Bazi Bushen capsule improves the deterioration of the intestinal barrier function by inhibiting NLRP3 inflammasome-mediated pyroptosis through microbiota-gut-brain axis. Front Microbiol 2024; 14:1320202. [PMID: 38260869 PMCID: PMC10801200 DOI: 10.3389/fmicb.2023.1320202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 12/18/2023] [Indexed: 01/24/2024] Open
Abstract
Purpose The senescence-accelerated prone mouse 8 (SAMP8) is a widely used model for accelerating aging, especially in central aging. Mounting evidence indicates that the microbiota-gut-brain axis may be involved in the pathogenesis and progression of central aging-related diseases. This study aims to investigate whether Bazi Bushen capsule (BZBS) attenuates the deterioration of the intestinal function in the central aging animal model. Methods In our study, the SAMP8 mice were randomly divided into the model group, the BZ-low group (0.5 g/kg/d BZBS), the BZ-high group (1 g/kg/d BZBS) and the RAPA group (2 mg/kg/d rapamycin). Age-matched SAMR1 mice were used as the control group. Next, cognitive function was detected through Nissl staining and two-photon microscopy. The gut microbiota composition of fecal samples was analyzed by 16S rRNA gene sequencing. The Ileum tissue morphology was observed by hematoxylin and eosin staining, and the intestinal barrier function was observed by immunofluorescence. The expression of senescence-associated secretory phenotype (SASP) factors, including P53, TNF-α, NF-κB, IL-4, IL-6, and IL-10 was measured by real-time quantitative PCR. Macrophage infiltration and the proliferation and differentiation of intestinal cells were assessed by immunohistochemistry. We also detected the inflammasome and pyroptosis levels in ileum tissue by western blotting. Results BZBS improved the cognitive function and neuronal density of SAMP8 mice. BZBS also restored the intestinal villus structure and barrier function, which were damaged in SAMP8 mice. BZBS reduced the expression of SASP factors and the infiltration of macrophages in the ileum tissues, indicating a lower level of inflammation. BZBS enhanced the proliferation and differentiation of intestinal cells, which are essential for maintaining intestinal homeostasis. BZBS modulated the gut microbiota composition, by which BZBS inhibited the activation of inflammasomes and pyroptosis in the intestine. Conclusion BZBS could restore the dysbiosis of the gut microbiota and prevent the deterioration of intestinal barrier function by inhibiting NLRP3 inflammasome-mediated pyroptosis. These results suggested that BZBS attenuated the cognitive aging of SAMP8 mice, at least partially, by targeting the microbiota-gut-brain axis.
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Affiliation(s)
- Shixiong Zhang
- College of Traditional Chinese Medicine, College of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- National Key Laboratory for Innovation and Transformation of Luobing Theory, Shijiazhuang, China
| | - Mengnan Li
- National Key Laboratory for Innovation and Transformation of Luobing Theory, Shijiazhuang, China
- Key Laboratory of State Administration of TCM (Cardio-Cerebral Vessel Collateral Disease), Shijiazhuang, China
| | - Liping Chang
- National Key Laboratory for Innovation and Transformation of Luobing Theory, Shijiazhuang, China
- Key Laboratory of State Administration of TCM (Cardio-Cerebral Vessel Collateral Disease), Shijiazhuang, China
| | - Xinjing Mao
- College of Traditional Chinese Medicine, College of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- National Key Laboratory for Innovation and Transformation of Luobing Theory, Shijiazhuang, China
| | - Yuning Jiang
- College of Traditional Chinese Medicine, College of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- National Key Laboratory for Innovation and Transformation of Luobing Theory, Shijiazhuang, China
| | - Xiaogang Shen
- Key Laboratory of State Administration of TCM (Cardio-Cerebral Vessel Collateral Disease), Shijiazhuang, China
- High-level TCM Key Disciplines of National Administration of Traditional Chinese Medicine—Luobing Theory, Shijiazhuang, China
| | - Kunxu Niu
- Key Laboratory of State Administration of TCM (Cardio-Cerebral Vessel Collateral Disease), Shijiazhuang, China
- High-level TCM Key Disciplines of National Administration of Traditional Chinese Medicine—Luobing Theory, Shijiazhuang, China
| | - Xuan Lu
- National Key Laboratory for Innovation and Transformation of Luobing Theory, Shijiazhuang, China
- High-level TCM Key Disciplines of National Administration of Traditional Chinese Medicine—Luobing Theory, Shijiazhuang, China
| | - Runtao Zhang
- National Key Laboratory for Innovation and Transformation of Luobing Theory, Shijiazhuang, China
- High-level TCM Key Disciplines of National Administration of Traditional Chinese Medicine—Luobing Theory, Shijiazhuang, China
| | - Yahui Song
- Key Laboratory of State Administration of TCM (Cardio-Cerebral Vessel Collateral Disease), Shijiazhuang, China
- High-level TCM Key Disciplines of National Administration of Traditional Chinese Medicine—Luobing Theory, Shijiazhuang, China
| | - Kun Ma
- Key Laboratory of State Administration of TCM (Cardio-Cerebral Vessel Collateral Disease), Shijiazhuang, China
- High-level TCM Key Disciplines of National Administration of Traditional Chinese Medicine—Luobing Theory, Shijiazhuang, China
| | - Hongrong Li
- National Key Laboratory for Innovation and Transformation of Luobing Theory, Shijiazhuang, China
- Key Laboratory of State Administration of TCM (Cardio-Cerebral Vessel Collateral Disease), Shijiazhuang, China
| | - Cong Wei
- National Key Laboratory for Innovation and Transformation of Luobing Theory, Shijiazhuang, China
- Key Laboratory of State Administration of TCM (Cardio-Cerebral Vessel Collateral Disease), Shijiazhuang, China
| | - Yunlong Hou
- National Key Laboratory for Innovation and Transformation of Luobing Theory, Shijiazhuang, China
| | - Yiling Wu
- College of Traditional Chinese Medicine, College of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- National Key Laboratory for Innovation and Transformation of Luobing Theory, Shijiazhuang, China
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Zane F, Bouzid H, Sosa Marmol S, Brazane M, Besse S, Molina JL, Cansell C, Aprahamian F, Durand S, Ayache J, Antoniewski C, Todd N, Carré C, Rera M. Smurfness-based two-phase model of ageing helps deconvolve the ageing transcriptional signature. Aging Cell 2023; 22:e13946. [PMID: 37822253 PMCID: PMC10652310 DOI: 10.1111/acel.13946] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/17/2023] [Accepted: 07/18/2023] [Indexed: 10/13/2023] Open
Abstract
Ageing is characterised at the molecular level by six transcriptional 'hallmarks of ageing', that are commonly described as progressively affected as time passes. By contrast, the 'Smurf' assay separates high-and-constant-mortality risk individuals from healthy, zero-mortality risk individuals, based on increased intestinal permeability. Performing whole body total RNA sequencing, we found that Smurfness distinguishes transcriptional changes associated with chronological age from those associated with biological age. We show that transcriptional heterogeneity increases with chronological age in non-Smurf individuals preceding the other five hallmarks of ageing that are specifically associated with the Smurf state. Using this approach, we also devise targeted pro-longevity genetic interventions delaying entry in the Smurf state. We anticipate that increased attention to the evolutionary conserved Smurf phenotype will bring about significant advances in our understanding of the mechanisms of ageing.
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Affiliation(s)
- Flaminia Zane
- Université Paris Cité, INSERM UMR U1284ParisFrance
- Institut de Biologie Paris Seine, Sorbonne UniversitéParisFrance
| | - Hayet Bouzid
- Université Paris Cité, INSERM UMR U1284ParisFrance
- Institut de Biologie Paris Seine, Sorbonne UniversitéParisFrance
| | | | - Mira Brazane
- Institut de Biologie Paris Seine, Sorbonne UniversitéParisFrance
| | | | | | - Céline Cansell
- Université Paris‐Saclay, AgroParisTech, INRAE, UMR PNCAPalaiseauFrance
| | - Fanny Aprahamian
- Metabolomics and Cell Biology Platforms, UMS AMMICaInstitut Gustave RoussyVillejuifFrance
- Centre de Recherche des Cordeliers, Equipe Labellisée par la Ligue Contre le CancerUniversité de Paris, Sorbonne Université, INSERM U1138, Institut Universitaire de FranceParisFrance
| | - Sylvère Durand
- Metabolomics and Cell Biology Platforms, UMS AMMICaInstitut Gustave RoussyVillejuifFrance
- Centre de Recherche des Cordeliers, Equipe Labellisée par la Ligue Contre le CancerUniversité de Paris, Sorbonne Université, INSERM U1138, Institut Universitaire de FranceParisFrance
| | - Jessica Ayache
- Institut Jacques Monod, CNRS UMR 7592, Université Paris CitéParisFrance
| | | | - Nicolas Todd
- Eco‐Anthropologie (EA), Muséum National d'Histoire Naturelle, CNRSUniversité de Paris, Musée de l'HommeParisFrance
| | - Clément Carré
- Institut de Biologie Paris Seine, Sorbonne UniversitéParisFrance
| | - Michael Rera
- Université Paris Cité, INSERM UMR U1284ParisFrance
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Homolak J. Gastrointestinal redox homeostasis in ageing. Biogerontology 2023; 24:741-752. [PMID: 37436501 DOI: 10.1007/s10522-023-10049-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 06/26/2023] [Indexed: 07/13/2023]
Abstract
The gastrointestinal (GI) barrier acts as the primary interface between humans and the external environment. It constantly faces the risk of inflammation and oxidative stress due to exposure to foreign substances and microorganisms. Thus, maintaining the structural and functional integrity of the GI barrier is crucial for overall well-being, as it helps prevent systemic inflammation and oxidative stress, which are major contributors to age-related diseases. A healthy gut relies on maintaining gut redox homeostasis, which involves several essential elements. Firstly, it requires establishing a baseline electrophilic tone and an electrophilic mucosal gradient. Secondly, the electrophilic system needs to have sufficient capacity to generate reactive oxygen species, enabling effective elimination of invading microorganisms and rapid restoration of the barrier integrity following breaches. These elements depend on physiological redox signaling mediated by electrophilic pathways such as NOX2 and the H2O2 pathway. Additionally, the nucleophilic arm of redox homeostasis should exhibit sufficient reactivity to restore the redox balance after an electrophilic surge. Factors contributing to the nucleophilic arm include the availability of reductive substrates and redox signaling mediated by the cytoprotective Keap1-Nrf2 pathway. Future research should focus on identifying preventive and therapeutic strategies that enhance the strength and responsiveness of GI redox homeostasis. These strategies aim to reduce the vulnerability of the gut to harmful stimuli and address the decline in reactivity often observed during the aging process. By strengthening GI redox homeostasis, we can potentially mitigate the risks associated with age-related gut dyshomeostasis and optimize overall health and longevity.
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Affiliation(s)
- Jan Homolak
- Department of Pharmacology, University of Zagreb School of Medicine, Salata 11, 10 000, Zagreb, Croatia.
- Croatian Institute for Brain Research, University of Zagreb School of Medicine, Salata 12, 10 000, Zagreb, Croatia.
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Chen Y, Shen Y. Deteriorating maintenance of the intestinal wall. NATURE AGING 2023; 3:1046-1047. [PMID: 37640904 DOI: 10.1038/s43587-023-00477-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Affiliation(s)
- Yifan Chen
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yidong Shen
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai, China.
- University of Chinese Academy of Sciences, Beijing, China.
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