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Nong W, Wei G, Wang J, Lei X, Wang J, Wei Y, Dong M, He L. Nicotinamide Mononucleotide Improves Spermatogenic Disorders in Aluminum-Exposed Rats by Modulating the Glycolytic Pathway. Biol Trace Elem Res 2024; 202:3180-3192. [PMID: 37851298 DOI: 10.1007/s12011-023-03904-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 10/02/2023] [Indexed: 10/19/2023]
Abstract
This study aimed to investigate the protective effect of nicotinamide mononucleotide (NMN) on testicular spermatogenesis in aluminum chloride (AlCl3)-exposed rats and to elucidate the potential underlying mechanism. The results indicated that AlCl3-induced testicular damage, leading to reduced sperm quality, increased apoptosis, decreased cell proliferation, and impaired Sertoli cell function in rats. Additionally, glycolytic metabolism was observed to be hindered. However, after NMN treatment, there was a noticeable improvement in testicular damage among the rats, marked by increased sperm quality, reduced apoptosis, enhanced cell proliferation, improved Sertoli cell function, and an activated glycolytic metabolism. The findings of this study suggest that NMN alleviates testicular spermatogenesis impairment induced by AlCl3 exposure through the inhibition of spermatogenic cell apoptosis, promotion of spermatogenic cell proliferation, and activation of glycolytic pathways. The study contributes an experimental foundation for potential future clinical applications of NMN in cases of AlCl3-exposed spermatogenic dysfunction.
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Affiliation(s)
- Weihua Nong
- Department of Obstetrics and Gynecology, The Affiliated Hospital of Youjiang Medical University for Nationalities, Zhongshan Second Road, Baise, 533300, Guangxi, China
- Reproductive Medicine, Guangxi Medical and Health Key Discipline Construction Project of the Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
- Modern Industrial College of Biomedicine and Great Health, Youjiang Medical University for Nationalities, Chengxiang Road 98, Baise, 533300, Guangxi, China
| | - Gaomeng Wei
- Department of Urology, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Junli Wang
- Reproductive Medicine, Guangxi Medical and Health Key Discipline Construction Project of the Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Xiaocan Lei
- Department of Histology and Embryology, Clinical Anatomy & Reproductive Medicine Application Institute, Hengyang Medical School, University of South China, Hengyang, China
| | - Jinyuan Wang
- Department of Histology and Embryology, Clinical Anatomy & Reproductive Medicine Application Institute, Hengyang Medical School, University of South China, Hengyang, China
| | - Yanhong Wei
- Modern Industrial College of Biomedicine and Great Health, Youjiang Medical University for Nationalities, Chengxiang Road 98, Baise, 533300, Guangxi, China
| | - Mingyou Dong
- Modern Industrial College of Biomedicine and Great Health, Youjiang Medical University for Nationalities, Chengxiang Road 98, Baise, 533300, Guangxi, China.
| | - Liqiao He
- Department of Obstetrics and Gynecology, The Affiliated Hospital of Youjiang Medical University for Nationalities, Zhongshan Second Road, Baise, 533300, Guangxi, China.
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Xie N, Ma R, Wang L, Shu Y, He P, Zhou Y, Xiang Y, Wang Y. Cannabidiol regulates the activation of hepatic stellate cells by modulating the NOX4 and NF-κB pathways. Food Chem Toxicol 2024; 186:114517. [PMID: 38382869 DOI: 10.1016/j.fct.2024.114517] [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: 12/20/2023] [Revised: 02/12/2024] [Accepted: 02/12/2024] [Indexed: 02/23/2024]
Abstract
Cannabidiol (CBD) is an extract of natural cannabinoids that has therapeutic implications for a variety of ailments, such as neurological diseases, cardiomyopathy, and diabetes, due to its strong anti-inflammatory and oxidative stress properties. Our purpose was to reveal the possible underlying mechanisms and effect of CBD on the glucose oxidase (GO)-induced activation of HSC-T6 and LX-2 cells. The results showed that CBD effectively inhibited the proliferation and activation of HSC-T6 and LX-2 cells, and reduced the production of profibrotic factors to different degrees. CBD disrupted the NOX4 signalling pathway in activated HSC-T6 and LX-2 cells, reduced ROS and MDA levels, and increased SOD and GSH levels, thereby stabilizing the oxidative imbalance. CBD significantly inhibited the phosphorylation and degradation of NF-κB and IκBα, and decreased the release of TNF-α, IL-1β and IL-6. Moreover, CBD and an NF-κB-specific inhibitor (CAPE) effectively inhibited the expression of α-SMA, COL I, TNF-α and IL-1β to promote collagen metabolism and inhibit the inflammatory response. Overall, CBD inhibited HSCs activation through a and the mechanism involving the inhibition of NOX4 and NF-κB-dependent ROS regulation, thereby reducing inflammation and ameliorating oxidative imbalances.
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Affiliation(s)
- Na Xie
- Center for Clinical Laboratories, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, 550004, China; Xindu District People's Hospital, Department of Medical Laboratory, Chengdu, Sichuan, China
| | - Run Ma
- Center for Clinical Laboratories, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, 550004, China
| | - Lian Wang
- Center for Clinical Laboratories, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, 550004, China
| | - Yuanhui Shu
- Center for Clinical Laboratories, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, 550004, China; School of Clinical Laboratory Science, Guizhou Medical University, Guiyang, Guizhou, 550004, China
| | - Ping He
- Center for Clinical Laboratories, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, 550004, China; School of Clinical Laboratory Science, Guizhou Medical University, Guiyang, Guizhou, 550004, China
| | - Yan Zhou
- Center for Clinical Laboratories, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, 550004, China; School of Clinical Laboratory Science, Guizhou Medical University, Guiyang, Guizhou, 550004, China
| | - Yining Xiang
- Department of Pathology, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, 550004, China
| | - Yuping Wang
- Center for Clinical Laboratories, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, 550004, China; School of Clinical Laboratory Science, Guizhou Medical University, Guiyang, Guizhou, 550004, China.
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Xu C, Dai J, Ai H, Du W, Ji H. β-Nicotinamide Mononucleotide Promotes Cell Proliferation and Hair Growth by Reducing Oxidative Stress. Molecules 2024; 29:798. [PMID: 38398550 PMCID: PMC10893548 DOI: 10.3390/molecules29040798] [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: 12/24/2023] [Revised: 02/02/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024] Open
Abstract
β-Nicotinamide mononucleotide (NMN) has shown promising effects on intestinal health, and it is extensively applied as an anti-aging and Alzheimer's disease therapeutic, due to its medicinal properties. The effects of NMN on the growth of mouse hair were observed after hair removal. The results indicated that NMN can reverse the state of hair follicle atrophy, hair thinning, and hair sparsity induced by dihydrotestosterone (DHT), compared to that of minoxidil. In addition, the action mechanisms of NMN promoting hair growth in cultured human dermal papilla cells (HDPCs) treated with DHT were investigated in detail. The incubation of HDPCs with DHT led to a decrease in cell viability and the release of inflammatory mediators, including interleukin-6 (IL-6), interleukin-1Beta (IL-1β) and tumor necrosis factor Alpha (TNF-α). It was found that NMN can significantly lower the release of inflammatory factors induced by DHT in HDPCs. HDPCs cells are protected from oxidative stress damage by NMN, which inhibits the NF-κB p65 inflammatory signaling pathway. Moreover, the levels of androgen receptor (AR), dickkopf-1 (DKK-1), and β-catenin in the HDPCs were assessed using PCR, indicating that NMN can significantly enhance the expression of VEGF, reduced IL-6 levels and suppress the expression of AR and DKK-1, and notably increase β-catenin expression in DHT-induced HDPCs.
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Affiliation(s)
- Chuntao Xu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; (C.X.); (J.D.)
| | - Jiawei Dai
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; (C.X.); (J.D.)
| | - Hongxia Ai
- Guangdong Institute of Modern Agricultural Equipment, Guangzhou 510145, China
| | - Weian Du
- Guangdong Homy Genetics Ltd., Foshan 528000, China;
| | - Hongbing Ji
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; (C.X.); (J.D.)
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Institute of Green Petroleum Processing and Light Hydrocarbon, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
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Wang Y, Li Q, Ma Z, Xu H, Peng F, Chen B, Ma B, Qin L, Lan J, Li Y, Lan D, Li J, Wang S, Fu W. β-Nicotinamide Mononucleotide Alleviates Hydrogen Peroxide-Induced Cell Cycle Arrest and Death in Ovarian Granulosa Cells. Int J Mol Sci 2023; 24:15666. [PMID: 37958650 PMCID: PMC10649918 DOI: 10.3390/ijms242115666] [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: 08/18/2023] [Revised: 10/12/2023] [Accepted: 10/24/2023] [Indexed: 11/15/2023] Open
Abstract
Maintaining normal functions of ovarian granulosa cells (GCs) is essential for oocyte development and maturation. The dysfunction of GCs impairs nutrition supply and estrogen secretion by follicles, thus negatively affecting the breeding capacity of farm animals. Impaired GCs is generally associated with declines in Nicotinamide adenine dinucleotide (NAD+) levels, which triggers un-controlled oxidative stress, and the oxidative stress, thus, attack the subcellular structures and cause cell damage. β-nicotinamide mononucleotide (NMN), a NAD+ precursor, has demonstrated well-known antioxidant properties in several studies. In this study, using two types of ovarian GCs (mouse GCs (mGCs) and human granulosa cell line (KGN)) as cell models, we aimed to investigate the potential effects of NMN on gene expression patterns and antioxidant capacity of both mGCs and KGN that were exposed to hydrogen peroxide (H2O2). As shown in results of the study, mGCs that were exposed to H2O2 significantly altered the gene expression patterns, with 428 differentially expressed genes (DEGs) when compared with those of the control group. Furthermore, adding NMN to H2O2-cultured mGCs displayed 621 DEGs. The functional enrichment analysis revealed that DEGs were mainly enriched in key pathways like cell cycle, senescence, and cell death. Using RT-qPCR, CCK8, and β-galactosidase staining, we found that H2O2 exposure on mGCs obviously reduced cell activity/mRNA expressions of antioxidant genes, inhibited cell proliferation, and induced cellular senescence. Notably, NMN supplementation partially prevented these H2O2-induced abnormalities. Moreover, these similar beneficial effects of NMN on antioxidant capacity were confirmed in the KGN cell models that were exposed to H2O2. Taken together, the present results demonstrate that NMN supplementation protects against H2O2-induced impairments in gene expression pattern, cell cycle arrest, and cell death in ovarian GCs through boosting NAD+ levels and provide potential strategies to ameliorate uncontrolled oxidative stress in ovarian GCs.
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Affiliation(s)
- Yunduan Wang
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chendu 610041, China; (Y.W.); (H.X.); (J.L.)
| | - Qiao Li
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chendu 610041, China; (Y.W.); (H.X.); (J.L.)
| | - Zifeng Ma
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chendu 610041, China; (Y.W.); (H.X.); (J.L.)
| | - Hongmei Xu
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chendu 610041, China; (Y.W.); (H.X.); (J.L.)
| | - Feiyu Peng
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chendu 610041, China; (Y.W.); (H.X.); (J.L.)
| | - Bin Chen
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chendu 610041, China; (Y.W.); (H.X.); (J.L.)
| | - Bo Ma
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chendu 610041, China; (Y.W.); (H.X.); (J.L.)
| | - Linmei Qin
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chendu 610041, China; (Y.W.); (H.X.); (J.L.)
| | - Jiachen Lan
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chendu 610041, China; (Y.W.); (H.X.); (J.L.)
| | - Yueyue Li
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chendu 610041, China; (Y.W.); (H.X.); (J.L.)
| | - Daoliang Lan
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chendu 610041, China; (Y.W.); (H.X.); (J.L.)
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Southwest Minzu University, Ministry of Education, Chengdu 610041, China
| | - Jian Li
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chendu 610041, China; (Y.W.); (H.X.); (J.L.)
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Southwest Minzu University, Ministry of Education, Chengdu 610041, China
| | - Shujin Wang
- Institute of Life Sciences, Chongqing Medical University, Chongqing 400032, China
| | - Wei Fu
- College of Animal & Veterinary Sciences, Southwest Minzu University, Chendu 610041, China; (Y.W.); (H.X.); (J.L.)
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Southwest Minzu University, Ministry of Education, Chengdu 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu 610041, China
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Li Z, Liu H, Han W, Zhu S, Liu C. NMN Alleviates NP-Induced Learning and Memory Impairment Through SIRT1 Pathway in PC-12 Cell. Mol Neurobiol 2023; 60:2871-2883. [PMID: 36745337 DOI: 10.1007/s12035-023-03251-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Accepted: 01/28/2023] [Indexed: 02/07/2023]
Abstract
Nonylphenol (NP) is widely used in the chemical industry; it accumulates in organisms through environmental contamination and causes learning memory impairment. Nicotinamide mononucleotide (NMN) has been found to have a positive effect on the treatment of central nervous-related diseases. This study aimed to investigate the protective effect of NMN on NP-induced learning memory-related impairment in vitro and to further identify the underlying mechanisms. The results showed that NP induced oxidative stress and impaired the cholinergic system, 5-HT system in PC-12 cells. NMN alleviated NP-induced learning and memory impairment at the molecular level through alleviating oxidative stress and protective effects on the 5-HT system and cholinergic system. The 50 μM NP group significantly reduced the NAD+ content, and the relative expression of SIRT1, PGC-1α, Nrf2, MAOA, BDNF, and p-TrkB were significantly downregulated. Co-treatment of NMN with NP significantly reduced oxidative stress, improved the homeostasis of 5-HT and cholinergic system, enhanced the intracellular NAD+ content, and significantly upregulated the expression of SIRT1 pathway proteins. SIRT1 inhibitors reduced the expression of SIRT1 pathway-related proteins, which implied the impairment of learning and memory by NP and the protective effect of NMN might be achieved through the SIRT1-mediated PGC-1α/MAOA/BDNF signaling pathway. Overall, this study not only help us to understand the toxic mechanism of NP on learning memory impairment in vitro, but also have important reference significance to further explore the health care value of NMN and promote the development of related functional foods.
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Affiliation(s)
- Zhongyi Li
- College of Food Science, South China Agricultural University, 483#, Wu-Shan Ave., Tian-He District, Guangzhou, 510642, China
- Guangdong Provincial Key Laboratory of Food Quality and Safety, Guangzhou, 510642, China
| | - Huan Liu
- College of Food Science, South China Agricultural University, 483#, Wu-Shan Ave., Tian-He District, Guangzhou, 510642, China
- Guangdong Provincial Key Laboratory of Food Quality and Safety, Guangzhou, 510642, China
| | - Wenna Han
- College of Food Science, South China Agricultural University, 483#, Wu-Shan Ave., Tian-He District, Guangzhou, 510642, China
- Guangdong Provincial Key Laboratory of Food Quality and Safety, Guangzhou, 510642, China
| | - Siyu Zhu
- College of Food Science, South China Agricultural University, 483#, Wu-Shan Ave., Tian-He District, Guangzhou, 510642, China
- Guangdong Provincial Key Laboratory of Food Quality and Safety, Guangzhou, 510642, China
| | - Chunhong Liu
- College of Food Science, South China Agricultural University, 483#, Wu-Shan Ave., Tian-He District, Guangzhou, 510642, China.
- Guangdong Provincial Key Laboratory of Food Quality and Safety, Guangzhou, 510642, China.
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Tregub PP, Averchuk AS, Baranich TI, Ryazanova MV, Salmina AB. Physiological and Pathological Remodeling of Cerebral Microvessels. Int J Mol Sci 2022; 23:ijms232012683. [PMID: 36293539 PMCID: PMC9603917 DOI: 10.3390/ijms232012683] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 10/10/2022] [Accepted: 10/18/2022] [Indexed: 11/13/2022] Open
Abstract
There is growing evidence that the remodeling of cerebral microvessels plays an important role in plastic changes in the brain associated with development, experience, learning, and memory consolidation. At the same time, abnormal neoangiogenesis, and deregulated regulation of microvascular regression, or pruning, could contribute to the pathogenesis of neurodevelopmental diseases, stroke, and neurodegeneration. Aberrant remodeling of microvesselsis associated with blood-brain barrier breakdown, development of neuroinflammation, inadequate microcirculation in active brain regions, and leads to the dysfunction of the neurovascular unit and progressive neurological deficits. In this review, we summarize current data on the mechanisms of blood vessel regression and pruning in brain plasticity and in Alzheimer's-type neurodegeneration. We discuss some novel approaches to modulating cerebral remodeling and preventing degeneration-coupled aberrant microvascular activity in chronic neurodegeneration.
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Ru M, Wang W, Zhai Z, Wang R, Li Y, Liang J, Kothari D, Niu K, Wu X. Nicotinamide mononucleotide supplementation protects the intestinal function in aging mice and D-galactose induced senescent cells. Food Funct 2022; 13:7507-7519. [PMID: 35678708 DOI: 10.1039/d2fo00525e] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The nicotinamide adenine dinucleotide (NAD+) level shows a temporal decrease during the aging process, which has been deemed as an aging hallmark. Nicotinamide mononucleotide (NMN), a key NAD+ precursor, shows the potential to retard the age-associated functional decline in organs. In the current study, to explore whether NMN has an impact on the intestine during the aging process, the effects of NMN supplementation on the intestinal morphology, microbiota, and NAD+ content, as well as its anti-inflammatory, anti-oxidative and barrier functions were investigated in aging mice and D-galactose (D-gal) induced senescent IPEC-J2 cells. The results showed that 4 months of NMN administration had little impact on the colonic microbiota and NAD+ content in aging mice, while it significantly increased the jejunal NAD+ content and improved the jejunal structure including increasing the villus length and shortening the crypt. Moreover, NMN supplementation significantly up-regulated the mRNA expression of SIRT3, SIRT6, nuclear factor E2-related factor 2 (Nrf2), heme oxygenase-1 (HO-1), the catalytic subunit of glutamate-cysteine ligase (GCLC), superoxide dismutase 2 (SOD2), occludin, and claudin-1, but down-regulated the mRNA expression of tumor necrosis factor alpha (TNF-α). Specifically, in the D-gal induced senescent IPEC-J2 cells, 500 μM NMN restored the increased mRNA expression of interleukin 6 (IL6ST), IL-1A, nuclear factor (NF-κB1), and claudin-1 to normal levels to some extent. Furthermore, NMN treatment significantly affected the mRNA expression of antioxidant enzymes including NQO1, GCLC, SOD 2 and 3, and GSH-PX1, 3 and 4. In addition, 200 μM NMN enhanced the cell viability and total antioxidant capacity and lowered the reactive oxygen species level of senescent IPEC-J2 cells. Notably, NMN restored the down-regulated protein expression of occludin and claudin-1 induced by D-gal. The above data demonstrated the potential of NMN in ameliorating the structural and functional decline in the intestine during aging.
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Affiliation(s)
- Meng Ru
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang 330096, China.
| | - Wanwan Wang
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang 330096, China.
| | - Zhenya Zhai
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang 330096, China.
| | - Ruxia Wang
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang 330096, China.
| | - Yumeng Li
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang 330096, China. .,Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, PR China.
| | - Jiang Liang
- ERA Biotechnology (Shenzhen) Co., Ltd, Shenzhen 518155, China
| | - Damini Kothari
- Department of Animal Science and Technology, Konkuk University, Seoul 05029, South Korea
| | - Kaimin Niu
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang 330096, China. .,CAS Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, Hunan, China
| | - Xin Wu
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang 330096, China. .,Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, PR China. .,CAS Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, Hunan, China
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Zeng HF, Xu J, Wang XL, Li SJ, Han ZY. Nicotinamide mononucleotide alleviates heat stress-induced oxidative stress and apoptosis in BMECs through reducing mitochondrial damage and endoplasmic reticulum stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 235:113441. [PMID: 35358918 DOI: 10.1016/j.ecoenv.2022.113441] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 03/15/2022] [Accepted: 03/19/2022] [Indexed: 06/14/2023]
Abstract
Heat stress is directly correlated to mammary gland dysfunction in dairy cows, especially in summer. Abnormally high environmental temperature induces oxidative stress and apoptosis in bovine mammary epithelial cells (BMECs). Nicotinamide mononucleotide (NMN) has beneficial effects in maintaining the cellular physiological functions. In this study, we evaluate the protective effect of NMN on heat stress-induced apoptosis of BMECs and explore the potential underlying mechanisms. Our results showed that heat stress considerably decreased cell viability in BMECs, whereas pretreatment of BMECs with NMN (150 μM) for 24 h significantly alleviated the negative effects of heat stress on cells. NMN protected BMECs from heat stress-induced oxidative stress by inhibiting the excessive accumulation of reactive oxygen species (ROS) and increasing the activity of antioxidant enzymes. It also inhibited apoptosis by reducing the ratio of Bax/Bcl2 and blocking proteolytic the cleavage of Caspase-3 in heat stressed-BMECs. Importantly, NMN treatment could reduce mitochondrial damage through mediating the expression of mitochondrial fission and fusion-related genes, including Dynamin related protein 1 (Drp1), Mitochondrial fission 1 protein (Fis1), and Mitofusin1, 2 (MFN1, 2); and suppress endoplasmic reticulum stress through unfolded protein response regulator Glucose regulated protein 78 (GRP78), and downstream elements Recombinant activating transcription factor 4 (ATF4) and C/EBP homologous protein (CHOP). Above all, our results demonstrate that NMN supplemention attenuates heat stress-induced oxidative stress and apoptosis in BMECs by maintaining mitochondrial fission and fusion, and regulating endoplasmic reticulum stress, which provides the convincing evidence that NMN has valuable potential in alleviating mammary gland injury of dairy cows caused by environmental heat stress.
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Affiliation(s)
- Han-Fang Zeng
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Jie Xu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Xin-Ling Wang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Shu-Jie Li
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhao-Yu Han
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
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