1
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Dai KY, Wang RH, Mu L, Ji HY, Liu AJ. Structural characteristics and anti-tumor activity of alcohol-precipitated polysaccharides from Cordyceps militaris under different ethanol concentrations. Int J Biol Macromol 2024; 278:134784. [PMID: 39151863 DOI: 10.1016/j.ijbiomac.2024.134784] [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: 03/22/2024] [Revised: 07/09/2024] [Accepted: 08/14/2024] [Indexed: 08/19/2024]
Abstract
Six Cordyceps militaris polysaccharides (named CMP-1, CMP-2, CMP-3, CMP-4, CMP-9, and CMP-A) were obtained by fractional alcohol precipitation. The experimental results showed that the six Cordyceps militaris polysaccharides had similar chemical composition and spectral features, and different molecular weights, monosaccharide compositions and anti-tumor activities. Purification of CMP-9 yielded the small molecule polysaccharide LMW-CMP (3.06 kDa). Structural experiments showed that LMW-CMP is an α-glucan with (1 → 4)-α-D-Glcp as the main chain and a glucose branched chain attached at the O-6 position. The results of cell experiments showed that LMW-CMP could effectively inhibit the growth and proliferation of HepG2 cells, activate the downstream NF-κB signaling pathway through the MAPK pathway to induce apoptosis of HepG2 cells, and block apoptosis at the G1 phase. Animal experiments showed that LMW-CMP inhibited the proliferation of tumor cells in H22 tumor-bearing mice by improving the state of immune organs, increasing the activity of immune cells and cytokine levels in the body, and regulating the distribution of lymphocyte subpopulations, with a tumor inhibition rate of 45.70 % (200 mg/kg).
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Affiliation(s)
- Ke-Yao Dai
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Ruo-Han Wang
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Lan Mu
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Hai-Yu Ji
- College of Life Sciences, Yantai University, Yantai, Shandong 264005, China.
| | - An-Jun Liu
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China.
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2
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Lei Z, Shi Y, Zou J, Zhang X, Xin B, Guo D, Sun J, Luan F. A review of the polysaccharides against fatigue and the underlying mechanism. Int J Biol Macromol 2024; 275:133601. [PMID: 38969031 DOI: 10.1016/j.ijbiomac.2024.133601] [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: 03/11/2024] [Revised: 06/22/2024] [Accepted: 06/30/2024] [Indexed: 07/07/2024]
Abstract
Fatigue is a common physiological state that affects normal human activities. Prolonged fatigue induces a variety of diseases and seriously affects human health, so it is imperative to discover nutritional dietary supplements and treatments without side effects, among which natural anti-fatigue polysaccharides have shown great potential. Polysaccharides, a class of biomolecules produced by a variety of organisms such as plants, animals, bacteria and algae, have attracted much attention in recent years due to their anti-fatigue activity and fewer side effects. This review summarizes the classification, dosage and experimental models of polysaccharides with anti-fatigue activity obtained from different natural sources. We also review the fatigue-relieving effects of these polysaccharides through mechanisms such as modulating oxidative damage, regulating energy metabolism and influencing intestinal flora, as well as the effects of molecular weights, monosaccharide compositions, structural features and chemical modifications of the polysaccharides on their anti-fatigue activities to support their potential application value in functional foods and pharmaceuticals. New valuable insights for future research on natural polysaccharides are also presented in the field of natural production of bio-based functional materials, functional foods and therapeutic agents.
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Affiliation(s)
- Ziwen Lei
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China
| | - Yajun Shi
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China
| | - Junbo Zou
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China
| | - Xiaofei Zhang
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China
| | - Bao Xin
- School of Public Health, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China
| | - Dongyan Guo
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China
| | - Jing Sun
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China
| | - Fei Luan
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China.
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3
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Yang Y, Feng Z, Luo YH, Chen JM, Zhang Y, Liao YJ, Jiang H, Long Y, Wei B. Exercise-Induced Central Fatigue: Biomarkers, and Non-Medicinal Interventions. Aging Dis 2024:AD.2024.0567. [PMID: 39012671 DOI: 10.14336/ad.2024.0567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Accepted: 06/27/2024] [Indexed: 07/17/2024] Open
Abstract
Fatigue, commonly experienced in daily life, is a feeling of extreme tiredness, shortage or lack of energy, exhaustion, and difficulty in performing voluntary tasks. Central fatigue, defined as a progressive failure to voluntarily activate the muscle, is typically linked to moderate- or light-intensity exercise. However, in some instances, high-intensity exercise can also trigger the onset of central fatigue. Exercise-induced central fatigue often precedes the decline in physical performance in well-trained athletes. This leads to a reduction in nerve impulses, decreased neuronal excitability, and an imbalance in brain homeostasis, all of which can adversely impact an athlete's performance and the longevity of their sports career. Therefore, implementing strategies to delay the onset of exercise-induced central fatigue is vital for enhancing athletic performance and safeguarding athletes from the debilitating effects of fatigue. In this review, we discuss the structural basis, measurement methods, and biomarkers of exercise-induced central fatigue. Furthermore, we propose non-pharmacological interventions to mitigate its effects, which can potentially foster improvements in athletes' performances in a healthful and sustainable manner.
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Affiliation(s)
- Ying Yang
- Institute of Translational Medicine, School of Basic Medical, Department of Special Medicine, School of Public Health, Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Zhi Feng
- Institute of Translational Medicine, School of Basic Medical, Department of Special Medicine, School of Public Health, Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Yu-Hang Luo
- Institute of Translational Medicine, School of Basic Medical, Department of Special Medicine, School of Public Health, Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Jue-Miao Chen
- Institute of Translational Medicine, School of Basic Medical, Department of Special Medicine, School of Public Health, Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Yu Zhang
- Institute of Translational Medicine, School of Basic Medical, Department of Special Medicine, School of Public Health, Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Yi-Jun Liao
- Institute of Translational Medicine, School of Basic Medical, Department of Special Medicine, School of Public Health, Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Hui Jiang
- Institute of Translational Medicine, School of Basic Medical, Department of Special Medicine, School of Public Health, Hengyang Medical College, University of South China, Hengyang, 421001, China
| | - Yinxi Long
- Department of Neurology, Affiliated Hengyang Hospital of Hunan Normal University &;amp Hengyang Central Hospital, Hengyang, 421001, China
| | - Bo Wei
- Institute of Translational Medicine, School of Basic Medical, Department of Special Medicine, School of Public Health, Hengyang Medical College, University of South China, Hengyang, 421001, China
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4
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Li W, Huang X, Wei Y, Yin T, Diao L. Connecting the dots: the role of fatigue in female infertility. Reprod Biol Endocrinol 2024; 22:66. [PMID: 38849828 PMCID: PMC11157719 DOI: 10.1186/s12958-024-01235-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 05/21/2024] [Indexed: 06/09/2024] Open
Abstract
Fatigue, an increasingly acknowledged symptom in various chronic diseases, has garnered heightened attention, during the medical era of bio-psycho-social model. Its persistence not only significantly compromises an individual's quality of life but also correlates with chronic organ damage. Surprisingly, the intricate relationship between fatigue and female reproductive health, specifically infertility, remains largely unexplored. Our exploration into the existing body of evidence establishes a compelling link between fatigue with uterine and ovarian diseases, as well as conditions associated with infertility, such as rheumatism. This observation suggests a potentially pivotal role of fatigue in influencing overall female fertility. Furthermore, we propose a hypothetical mechanism elucidating the impact of fatigue on infertility from multiple perspectives, postulating that neuroendocrine, neurotransmitter, inflammatory immune, and mitochondrial dysfunction resulting from fatigue and its co-factors may further contribute to endocrine disorders, menstrual irregularities, and sexual dysfunction, ultimately leading to infertility. In addition to providing this comprehensive theoretical framework, we summarize anti-fatigue strategies and accentuate current knowledge gaps. By doing so, our aim is to offer novel insights, stimulate further research, and advance our understanding of the crucial interplay between fatigue and female reproductive health.
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Grants
- 82371684, 82271672 General Program of the National Natural Science Foundation of China
- 82371684, 82271672 General Program of the National Natural Science Foundation of China
- 82371684, 82271672 General Program of the National Natural Science Foundation of China
- 82371684, 82271672 General Program of the National Natural Science Foundation of China
- 82371684, 82271672 General Program of the National Natural Science Foundation of China
- JCRCWL-2022-001 the Interdisciplinary Innovative Talents Foundation from Renmin Hospital of Wuhan University
- JCRCWL-2022-001 the Interdisciplinary Innovative Talents Foundation from Renmin Hospital of Wuhan University
- JCRCWL-2022-001 the Interdisciplinary Innovative Talents Foundation from Renmin Hospital of Wuhan University
- JCRCWL-2022-001 the Interdisciplinary Innovative Talents Foundation from Renmin Hospital of Wuhan University
- JCRCWL-2022-001 the Interdisciplinary Innovative Talents Foundation from Renmin Hospital of Wuhan University
- 2022A1515010650, 2023A1515011675 the General Program of the Natural Science Foundation of Guangdong Province
- 2022A1515010650, 2023A1515011675 the General Program of the Natural Science Foundation of Guangdong Province
- 2022A1515010650, 2023A1515011675 the General Program of the Natural Science Foundation of Guangdong Province
- 2022A1515010650, 2023A1515011675 the General Program of the Natural Science Foundation of Guangdong Province
- 2022A1515010650, 2023A1515011675 the General Program of the Natural Science Foundation of Guangdong Province
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Affiliation(s)
- Wenzhu Li
- Reproductive Medical Center, Renmin Hospital of Wuhan University and Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan, 430060, China
| | - Xiaoyan Huang
- Department of Rheumatology, The University of Hong Kong- Shenzhen Hospital, Shenzhen, 518053, China
| | - Yiqiu Wei
- Reproductive Medical Center, Renmin Hospital of Wuhan University and Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan, 430060, China
| | - Tailang Yin
- Reproductive Medical Center, Renmin Hospital of Wuhan University and Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan, 430060, China.
| | - Lianghui Diao
- Shenzhen Key Laboratory of Reproductive Immunology for Peri-implantation, Shenzhen Zhongshan Institute for Reproductive Medicine and Genetics, Shenzhen Zhongshan Obstetrics & Gynecology Hospital (formerly Shenzhen Zhongshan Urology Hospital), Shenzhen, 518045, China.
- Guangdong Engineering Technology Research Center of Reproductive Immunology for Peri- implantation, Shenzhen, 518045, China.
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Chen N, Hu M, Jiang T, Xiao P, Duan JA. Insights into the molecular mechanisms, structure-activity relationships and application prospects of polysaccharides by regulating Nrf2-mediated antioxidant response. Carbohydr Polym 2024; 333:122003. [PMID: 38494201 DOI: 10.1016/j.carbpol.2024.122003] [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: 12/11/2023] [Revised: 02/24/2024] [Accepted: 02/26/2024] [Indexed: 03/19/2024]
Abstract
The occurrence and development of many diseases are closely related to oxidative stress. In this context, accumulating evidence suggests that Nrf2, as the master switch of cellular antioxidant signaling, plays a central role in controlling the expression of antioxidant genes. The core molecular mechanism of polysaccharides treatment of oxidative stress-induced diseases is to activate Keap1/Nrf2/ARE signaling pathway, promote nuclear translocation of Nrf2, and up-regulate the expression of antioxidant enzymes. However, recent studies have shown that other signaling pathways in which polysaccharides exert antioxidant effects, such as PI3K/Akt/GSK3β, JNK/Nrf2 and NF-κB, have complex crosstalk with Keap1/Nrf2/ARE, may have direct effects on the nuclear translocation of Nrf2. This suggests a new strategy for designing polysaccharides as modulators of Nrf2-dependent pathways to target the antioxidant response. Therefore, in this work, we investigate the crosstalk between Keap1/Nrf2/ARE and other antioxidant signaling pathways of polysaccharides by regulating Nrf2-mediated antioxidant response. For the first time, the structural-activity relationship of polysaccharides, including molecular weight, monosaccharide composition, and glycosidic linkage, is systematically elucidated using principal component analysis and cluster analysis. This review also summarizes the application of antioxidant polysaccharides in food, animal production, cosmetics and biomaterials. The paper has significant reference value for screening antioxidant polysaccharides targeting Nrf2.
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Affiliation(s)
- Nuo Chen
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, and Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Meifen Hu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, and Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Tingyue Jiang
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, and Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Ping Xiao
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, and Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Nanjing University of Chinese Medicine, Nanjing 210023, PR China.
| | - Jin-Ao Duan
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, and Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Nanjing University of Chinese Medicine, Nanjing 210023, PR China.
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6
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Qian L, Ruan Y, Gong X, Yu Z, Lin S, Li X, Shen Y, Luo H, Si Z, Liu Y. The neuroprotective effect of LCZ696 on methamphetamine-induced cognitive impairment in mice. Neurosci Lett 2024; 823:137630. [PMID: 38215873 DOI: 10.1016/j.neulet.2024.137630] [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: 10/13/2023] [Revised: 12/03/2023] [Accepted: 01/08/2024] [Indexed: 01/14/2024]
Abstract
OBJECTIVE Methamphetamine (METH) exposure commonly causes cognitive impairment. An angiotensin II receptor/neprilysin inhibitor (ARNI), LCZ696 has been demonstrated to inhibit inflammation, oxidative stress and apoptosis. The present study was designed to examine the effect of LCZ696 on METH-induced cognitive impairment and the underlying mechanism. METHODS Following daily treatment of either saline or METH (5 mg/kg) for 5 consecutive days, the cognitive function was tested using the Y-maze and the Novel Object Recognition (NOR) in Experiment 1. In Experiment 2, mice were initially treated with saline or LCZ696 (60 mg/kg) for 9 consecutive days, followed by LCZ696, METH or saline for 5 days. Cognitive testing was carried out as Experiment 1. In Experiment 3, SH-SY5Y cells were treated with either METH (2.5 Mm) or ddH2O for 12 h. The apoptosis and reactive oxygen species (ROS) level of SH-SY5Y were examined. In Experiment 4, SH-SY5Y cells were pretreated with either ddH2O or LCZ696 (70um) for 30 min, followed by ddH2O or METH treatment for 12 h. Nrf2 and HO-1 protein expression was examined in the ventral tegemental area (VTA) of all the animals and SH-SY5Y cells. RESULTS LCZ696 significantly improved METH-induced cognitive impairment, in conjunction with decreased apoptosis and ROS levels in VTA of METH-treated mice and SH-SY5Y cells. METH significantly decreased Nrf2 and HO-1 protein expression in VTA of mice and SH-SY5Y cells, which was reversed by LCZ696 treatment. CONCLUSION LCZ696 yields a neuroprotective effect against METH-induced cognitive dysfunction via the Nrf2/HO-1 signaling pathway.
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Affiliation(s)
- Liyin Qian
- School of Public Health, Health Science Center, Ningbo University, Ningbo 315021, China
| | - Yuer Ruan
- Department of Psychology, Faculty of Teacher Education, Ningbo University, Ningbo 315021, China
| | - Xinshuang Gong
- School of Public Health, Health Science Center, Ningbo University, Ningbo 315021, China
| | - Zhaoying Yu
- Department of Psychology, Faculty of Teacher Education, Ningbo University, Ningbo 315021, China
| | - Shujun Lin
- Department of Psychology, Faculty of Teacher Education, Ningbo University, Ningbo 315021, China
| | - Xiaofang Li
- Department of Psychology, Faculty of Teacher Education, Ningbo University, Ningbo 315021, China
| | - Yao Shen
- School of Public Health, Health Science Center, Ningbo University, Ningbo 315021, China
| | - Hu Luo
- Department of Psychology, Faculty of Teacher Education, Ningbo University, Ningbo 315021, China
| | - Zizhen Si
- School of Basic Medical Sciences, Health Science Center, Ningbo University, Ningbo 315021, China
| | - Yu Liu
- School of Basic Medical Sciences, Health Science Center, Ningbo University, Ningbo 315021, China.
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Kong H, Xu T, Wang S, Zhang Z, Li M, Qu S, Li Q, Gao P, Cong Z. The molecular mechanism of polysaccharides in combating major depressive disorder: A comprehensive review. Int J Biol Macromol 2024; 259:129067. [PMID: 38163510 DOI: 10.1016/j.ijbiomac.2023.129067] [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: 05/17/2023] [Revised: 12/10/2023] [Accepted: 12/25/2023] [Indexed: 01/03/2024]
Abstract
Major depressive disorder (MDD) is a complex psychiatric condition with diverse etiological factors. Typical pathological features include decreased cerebral cortex, subcortical structures, and grey matter volumes, as well as monoamine transmitter dysregulation. Although medications exist to treat MDD, unmet needs persist due to limited efficacy, induced side effects, and relapse upon drug withdrawal. Polysaccharides offer promising new therapies for MDD, demonstrating antidepressant effects with minimal side effects and multiple targets. These include neurotransmitter, neurotrophin, neuroinflammation, hypothalamic-pituitary-adrenal axis, mitochondrial function, oxidative stress, and intestinal flora regulation. This review explores the latest advancements in understanding the pharmacological actions and mechanisms of polysaccharides in treating major depression. We discuss the impact of polysaccharides' diverse structures and properties on their pharmacological actions, aiming to inspire new research directions and facilitate the discovery of novel anti-depressive drugs.
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Affiliation(s)
- Hongwei Kong
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Tianren Xu
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Shengguang Wang
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Zhiyuan Zhang
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Min Li
- Institute of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Suyan Qu
- Tai 'an Taishan District People's Hospital, China
| | - Qinqing Li
- Shanxi University of Chinese Medicine, China
| | - Peng Gao
- Institute of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China.
| | - Zhufeng Cong
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China; Affiliated Cancer Hospital of Shandong First Medical University, China.
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Farrell K, Auerbach A, Musaus M, Navabpour S, Liu C, Lin Y, Xie H, Jarome TJ. Phosphorylation of RPT6 Controls Its Ability to Bind DNA and Regulate Gene Expression in the Hippocampus of Male Rats during Memory Formation. J Neurosci 2024; 44:e1453232023. [PMID: 38124005 PMCID: PMC10860611 DOI: 10.1523/jneurosci.1453-23.2023] [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: 08/01/2023] [Revised: 10/31/2023] [Accepted: 11/29/2023] [Indexed: 12/23/2023] Open
Abstract
Memory formation requires coordinated control of gene expression, protein synthesis, and ubiquitin-proteasome system (UPS)-mediated protein degradation. The catalytic component of the UPS, the 26S proteasome, contains a 20S catalytic core surrounded by two 19S regulatory caps, and phosphorylation of the 19S cap regulatory subunit RPT6 at serine 120 (pRPT6-S120) has been widely implicated in controlling activity-dependent increases in proteasome activity. Recently, RPT6 was also shown to act outside the proteasome where it has a transcription factor-like role in the hippocampus during memory formation. However, little is known about the proteasome-independent function of "free" RPT6 in the brain or during memory formation and whether phosphorylation of S120 is required for this transcriptional control function. Here, we used RNA-sequencing along with novel genetic approaches and biochemical, molecular, and behavioral assays to test the hypothesis that pRPT6-S120 functions independently of the proteasome to bind DNA and regulate gene expression during memory formation. RNA-sequencing following siRNA-mediated knockdown of free RPT6 revealed 46 gene targets in the dorsal hippocampus of male rats following fear conditioning, where RPT6 was involved in transcriptional activation and repression. Through CRISPR-dCas9-mediated artificial placement of RPT6 at a target gene, we found that RPT6 DNA binding alone may be important for altering gene expression following learning. Further, CRISPR-dCas13-mediated conversion of S120 to glycine on RPT6 revealed that phosphorylation at S120 is necessary for RPT6 to bind DNA and properly regulate transcription during memory formation. Together, we reveal a novel function for phosphorylation of RPT6 in controlling gene transcription during memory formation.
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Affiliation(s)
- Kayla Farrell
- Departments of School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg 24060, Virginia
| | - Aubrey Auerbach
- Biological Sciences, Virginia Polytechnic Institute and State University, Blacksburg 24060, Virginia
| | - Madeline Musaus
- School of Neuroscience, Virginia Polytechnic Institute and State University, Blacksburg 24060, Virginia
| | - Shaghayegh Navabpour
- Translational Biology, Medicine, and Health Graduate Program, Virginia Polytechnic Institute and State University, Blacksburg 24060, Virginia
| | - Catherine Liu
- Departments of School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg 24060, Virginia
| | - Yu Lin
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Blacksburg 24060, Virginia
| | - Hehuang Xie
- School of Neuroscience, Virginia Polytechnic Institute and State University, Blacksburg 24060, Virginia
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Blacksburg 24060, Virginia
- Fralin Life Science Institute at Virginia Tech, Blacksburg 24060, Virginia
| | - Timothy J Jarome
- Departments of School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg 24060, Virginia
- School of Neuroscience, Virginia Polytechnic Institute and State University, Blacksburg 24060, Virginia
- Translational Biology, Medicine, and Health Graduate Program, Virginia Polytechnic Institute and State University, Blacksburg 24060, Virginia
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9
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Liu Y, Feng Z, Hu Y, Xu X, Kuang T, Liu Y. Polysaccharides derived from natural edible and medicinal sources as agents targeting exercise-induced fatigue: A review. Int J Biol Macromol 2024; 256:128280. [PMID: 38000591 DOI: 10.1016/j.ijbiomac.2023.128280] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 11/16/2023] [Accepted: 11/17/2023] [Indexed: 11/26/2023]
Abstract
Exercise-induced fatigue (EF) is a common occurrence during prolonged endurance and excessive exercise and is mainly caused by energy depletion, harmful metabolite accumulation, oxidative stress, and inflammation. EF usually leads to a reduction in initiating or maintaining spontaneous activities and muscle performance and ultimately results in a decrease in the quality of life of people who engage in physical work. Therefore, the interest in investigating EF-targeting agents with minimal side effects and good long-term efficacy has substantially increased. Natural edible and medicinal polysaccharides have shown positive anti-EF effects, but the relevant reviews are rare. This review comprehensively summarizes studies on natural polysaccharides from edible and medicinal sources that can relieve EF and improve physical performance from the past decade, focusing on their sources, monosaccharide compositions, anti-EF effects, and possible molecular mechanisms. Most of these anti-EF polysaccharides are heteropolysaccharides and are mainly composed of glucose, arabinose, galactose, rhamnose, xylose, and mannose. In EF animal models, the polysaccharides exert positive EF-alleviating effects through energy supply, metabolic regulation, antioxidation, anti-inflammation, and gut microbiota remodeling. However, further studies are still needed to clarify the anti-EF effects of these polysaccharides on human beings. In summary, the present review expects to provide scientific data for the future research and development of natural polysaccharide-based anti-EF drugs, dietary supplements, and health-care products for specific fatigue groups.
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Affiliation(s)
- Yuzhou Liu
- Chengdu Sport University, Chengdu 610041, China
| | - Zige Feng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 610037, China; School of Pharmacy, Southwest Minzu University, Chengdu 610041, China
| | - Yao Hu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 610037, China; School of Physical Education and Health, Chengdu University of Traditional Chinese Medicine, Chengdu 610037, China
| | - Xinmei Xu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 610037, China
| | - Tingting Kuang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 610037, China.
| | - Yue Liu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 610037, China.
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Zhao R, Wu R, Jin J, Ning K, Wang Z, Yi X, Kapilevich L, Liu J. Signaling pathways regulated by natural active ingredients in the fight against exercise fatigue-a review. Front Pharmacol 2023; 14:1269878. [PMID: 38155906 PMCID: PMC10752993 DOI: 10.3389/fphar.2023.1269878] [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: 07/31/2023] [Accepted: 12/04/2023] [Indexed: 12/30/2023] Open
Abstract
Exercise fatigue is a normal protective mechanism of the body. However, long-term fatigue hinders normal metabolism and exercise capacity. The generation and recovery from exercise fatigue involves alterations in multiple signaling pathways, mainly AMPK, PI3K/Akt, Nrf2/ARE, NF-κB, PINK1/Parkin, and BDNF/TrkB, as well as MAPK signaling pathways that mediate energy supply, reduction of metabolites, oxidative stress homeostasis, muscle fiber type switching, and central protective effects. In recent studies, a rich variety of natural active ingredients have been identified in traditional Chinese medicines and plant extracts with anti-fatigue effects, opening up the field of research in new anti-fatigue drugs. In this review we give an overview of the signaling pathways associated with the activity of natural food active ingredients against exercise fatigue. Such a comprehensive review is necessary to understand the potential of these materials as preventive measures and treatments of exercise fatigue. We expect the findings highlighted and discussed here will help guide the development of new health products and provide a theoretical and scientific basis for future research on exercise fatigue.
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Affiliation(s)
- Rongyue Zhao
- College of Exercise and Health, Shenyang Sport University, Shenyang, China
| | - Ruomeng Wu
- College of Exercise and Health, Shenyang Sport University, Shenyang, China
| | - Junjie Jin
- College of Exercise and Health, Shenyang Sport University, Shenyang, China
| | - Ke Ning
- College of Exercise and Health, Shenyang Sport University, Shenyang, China
| | - Zhuo Wang
- College of Exercise and Health, Shenyang Sport University, Shenyang, China
| | - Xuejie Yi
- Exercise and Health Research Center, Department of Kinesiology, Shenyang Sport University, Shenyang, Liaoning, China
| | - Leonid Kapilevich
- Faculty of Physical Education, Nаtionаl Reseаrch Tomsk Stаte University, Tomsk, Russia
| | - Jiao Liu
- College of Exercise and Health, Shenyang Sport University, Shenyang, China
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11
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Sha A, Liu Y, Qiu X, Xiong B. Polysaccharide from Paris polyphylla improves learning and memory ability in D-galactose-induced aging model mice based on antioxidation, p19/p53/p21, and Wnt/β-catenin signaling pathways. Int J Biol Macromol 2023; 251:126311. [PMID: 37579895 DOI: 10.1016/j.ijbiomac.2023.126311] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 07/30/2023] [Accepted: 08/11/2023] [Indexed: 08/16/2023]
Abstract
The current study aimed to investigate the effects and mechanisms of Paris polyphylla polysaccharide component 1 (PPPm-1) to improve learning and memory in D-galactose-induced aging model mice. We determined the effects of PPPm-1 on the brain, organ index, and behavior in the aging model mice induced by D-galactose to study learning and memory improvement. UV-Vis spectrophotometry helped determine the PPPm-1 effect on antioxidant parameters associated with learning and memory in the brain and related organs of aging mice. Moreover, in the hippocampi of aging model mice, PPPm-1 effect on the mRNA and protein expressions of p19, p53, p21, P16, Rb, Wnt/1, β-catenin, CyclinD1, TCF-4, and GSK-3β were detected using the quantitative real-time PCR and enzyme-linked immunosorbent assay (ELISA), respectively. The results indicated that PPPm-1 could increase the brain and organ indexes, the avoidance latency, the total distance and average speed in the water maze, and the SOD and GSH-PX activities in the brain, liver tissues, and plasma. Moreover, the mRNA and protein expressions of Wnt/1, β-catenin, CyclinD1, and TCF-4 were also elevated in the hippocampi of aging model mice. However, the error times in step-through tests, the MDA content in the brain and liver tissues, the AChE activity in the brain tissue, the protein expressions of P16, Rb in the hippocampi, and the mRNA and protein expressions of p19, p53, p21, and GSK-3β in the hippocampi of aging model mice were significantly decreased. Thus, PPPm-1 significantly enhanced the learning and memory impairment induced by D-galactose in mice. The action mechanisms were associated with anti-oxidative stress, cholinergic nervous system function regulation, LTP enhancement in long-term memory, down-regulated expression of p19/p53/p21 signaling pathway factors, and Wnt/β-catenin signaling pathway activation.
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Affiliation(s)
- Ailong Sha
- School of Teacher Education, Chongqing Three Gorges University, Chongqing 404120, China; School of biology and food engineering, Chongqing Three Gorges University, Chongqing, 404120, China.
| | - Yi Liu
- School of biology and food engineering, Chongqing Three Gorges University, Chongqing, 404120, China
| | - Xinyu Qiu
- School of biology and food engineering, Chongqing Three Gorges University, Chongqing, 404120, China
| | - Binbing Xiong
- School of biology and food engineering, Chongqing Three Gorges University, Chongqing, 404120, China
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12
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Bai C, Su F, Zhang W, Kuang H. A Systematic Review on the Research Progress on Polysaccharides from Fungal Traditional Chinese Medicine. Molecules 2023; 28:6816. [PMID: 37836659 PMCID: PMC10574063 DOI: 10.3390/molecules28196816] [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: 09/02/2023] [Revised: 09/14/2023] [Accepted: 09/20/2023] [Indexed: 10/15/2023] Open
Abstract
Traditional Chinese medicine (TCM) is a class of natural drugs with multiple components and significant therapeutic effects through multiple targets. It also originates from a wide range of sources containing plants, animals and minerals, and among them, plant-based Chinese medicine also includes fungi. Fungal traditional Chinese medicine is a medicinal resource with a long history and widespread application in China. Accumulating evidence confirms that polysaccharide is the main pharmacodynamic material on which fungal TCM is based. The purpose of the current systematic review is to summarize the extraction, isolation, structural identification, biological functions, quality control and medicinal and edible applications of polysaccharides from fungal TCM in the past three years. This paper will supplement and deepen the understanding and application of polysaccharides from fungal TCM, and propose some valuable insights for further research and development of drugs and functional foods.
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Affiliation(s)
| | | | | | - Haixue Kuang
- Key Laboratory of Basic and Application Research of Beiyao, Ministry of Education, Heilongjiang University of Chinese Medicine, Harbin 150040, China; (C.B.); (F.S.); (W.Z.)
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13
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Ma Y, Wang Z, Hu Y. Insight into Nrf2: a bibliometric and visual analysis from 2000 to 2022. Front Genet 2023; 14:1266680. [PMID: 37779908 PMCID: PMC10540848 DOI: 10.3389/fgene.2023.1266680] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 09/06/2023] [Indexed: 10/03/2023] Open
Abstract
Background: Nrf2 plays a pivotal role in governing the antioxidant defense system, triggering the transcription of diverse genes involved in cellular protection. Its role in mitigating oxidative damage and modulating inflammatory processes has made Nrf2 an attractive target for therapeutic interventions. Despite the growing interest in Nrf2 research, a bibliometric analysis is relatively rare. This study aimed to clarify Nrf2's role in multiple diseases, identify emerging trends and hotspots using bibliometric analysis, and provide valuable insights and potential directions for future therapeutic interventions. Methods: The Science Citation Index of Web of Science Core library from 2000 to 2022 was searched on 22 October 2022. Use Microsoft Excel, CiteSpace, Bibliometrix, and VOS viewers for data collection and visualization of research focus and trends. Results: A vast collection of 22,040 research studies on Nrf2 published between 2000 and 2022 were identified. Nrf2 research has seen significant growth globally from 2000 to 2022. China leaded in publication numbers (9,623, 43.66%), while the United States dominated in citation frequency with 261,776 citations. China Medical University was the most productive institutions (459, 2.08%). Masayuki Yamamoto topped in publications (307), while Itoh K. ranked first in citations with 3669. Free Radical Biology and Medicine was the journal with the most studies and citations on Nrf2 (613, 29,687 citations). The analysis of keyword clustering enhanced the categorization of topics and can be summarized as oxidative stress, cancer, disorders in glycolipid metabolism, inflammation, and neurological conditions. Conclusion: China and the United States are the pioneers in Nrf2 research. Recently, there has been a comprehensive exploration of Nrf2 involving both experimental and clinical aspects, as well as mechanisms and therapeutic applications. Investigating novel molecular mechanisms, including NF-κB, Ho1, and Keap1, and developing enhanced, targeted Nrf2 activators or inhibitors to uncover the interplay among cancer, glycolipid metabolic disorder, inflammation, and neurological disorders will be upcoming trends and hotspots.
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Affiliation(s)
- Yawei Ma
- Department of Ophthalmology, The First Hospital of China Medical University, Shenyang, China
| | - Zhongqing Wang
- Department of Information Center, The First Hospital of China Medical University, Shenyang, China
| | - Yuedong Hu
- Department of Ophthalmology, The First Hospital of China Medical University, Shenyang, China
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14
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Zhou Y, Chu Z, Luo Y, Yang F, Cao F, Luo F, Lin Q. Dietary Polysaccharides Exert Anti-Fatigue Functions via the Gut-Muscle Axis: Advances and Prospectives. Foods 2023; 12:3083. [PMID: 37628082 PMCID: PMC10453516 DOI: 10.3390/foods12163083] [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: 07/28/2023] [Revised: 08/11/2023] [Accepted: 08/11/2023] [Indexed: 08/27/2023] Open
Abstract
Due to today's fast-paced lifestyle, most people are in a state of sub-health and face "unexplained fatigue", which can seriously affect their health, work efficiency, and quality of life. Fatigue is also a common symptom of several serious diseases such as Parkinson's, Alzheimer's, cancer, etc. However, the contributing mechanisms are not clear, and there are currently no official recommendations for the treatment of fatigue. Some dietary polysaccharides are often used as health care supplements; these have been reported to have specific anti-fatigue effects, with minor side effects and rich pharmacological activities. Dietary polysaccharides can be activated during food processing or during gastrointestinal transit, exerting unique effects. This review aims to comprehensively summarize and evaluate the latest advances in the biological processes of exercise-induced fatigue, to understand dietary polysaccharides and their possible molecular mechanisms in alleviating exercise-induced fatigue, and to systematically elaborate the roles of gut microbiota and the gut-muscle axis in this process. From the perspective of the gut-muscle axis, investigating the relationship between polysaccharides and fatigue will enhance our understanding of fatigue and may lead to a significant breakthrough regarding the molecular mechanism of fatigue. This paper will provide new perspectives for further research into the use of polysaccharides in food science and food nutrition, which could help develop potential anti-fatigue agents and open up novel therapies for sub-health conditions.
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Affiliation(s)
- Yaping Zhou
- National Engineering Research Center of Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, College of Food Science and Engineering, Central South University of Forestry and Technology, No. 498, Shaoshan Road, Changsha 410004, China; (Y.Z.); (Z.C.); (F.Y.); (F.L.)
| | - Zhongxing Chu
- National Engineering Research Center of Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, College of Food Science and Engineering, Central South University of Forestry and Technology, No. 498, Shaoshan Road, Changsha 410004, China; (Y.Z.); (Z.C.); (F.Y.); (F.L.)
| | - Yi Luo
- Department of Clinical Medicine, Medical College of Xiangya, Central South University, Changsha 410008, China;
| | - Feiyan Yang
- National Engineering Research Center of Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, College of Food Science and Engineering, Central South University of Forestry and Technology, No. 498, Shaoshan Road, Changsha 410004, China; (Y.Z.); (Z.C.); (F.Y.); (F.L.)
| | - Fuliang Cao
- Co-Innovation Center for the Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing 210037, China;
| | - Feijun Luo
- National Engineering Research Center of Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, College of Food Science and Engineering, Central South University of Forestry and Technology, No. 498, Shaoshan Road, Changsha 410004, China; (Y.Z.); (Z.C.); (F.Y.); (F.L.)
| | - Qinlu Lin
- National Engineering Research Center of Deep Process of Rice and Byproducts, Hunan Key Laboratory of Grain-Oil Deep Process and Quality Control, College of Food Science and Engineering, Central South University of Forestry and Technology, No. 498, Shaoshan Road, Changsha 410004, China; (Y.Z.); (Z.C.); (F.Y.); (F.L.)
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