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Li Z, Zhang F, Huang L, Deng J, Pan Y, Xu T, Liu J, Gao N, Duan R, Shao C, Wu C, Wang M, Lu L. Akt/mTOR Pathway Agonist SC79 Inhibits Autophagy and Apoptosis of Oligodendrocyte Precursor Cells Associated with Neonatal White Matter Dysplasia. Neurochem Res 2024; 49:670-683. [PMID: 38015410 PMCID: PMC10884134 DOI: 10.1007/s11064-023-04057-w] [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: 07/20/2023] [Revised: 10/18/2023] [Accepted: 10/25/2023] [Indexed: 11/29/2023]
Abstract
White matter dysplasia (WMD) in preterm infants due to intrauterine inflammation is caused by excessive apoptosis of oligodendrocyte precursor cells (OPCs). In recent years, studies have found that excessive autophagy and apoptosis are highly interconnected and important in infection and inflammatory diseases in general. Therefore, in this study, we aimed to confirm whether regulation of autophagy by using the Akt phosphorylation agonist SC79 can inhibit abnormal apoptosis of OPCs and promote myelin maturation and white matter development in neonatal rats with WMD. We investigated the effect of inflammation on oligodendrocyte development in P0 neonatal rats by intracerebellar injection of LPS, and collected brain tissue at P2 and P5. Immunohistochemical and immunofluorescence staining were used to evaluate white matter damage, while immunofluorescence staining, terminal deoxynucleotidyl transferase dUTP nick end labeling analysis (TUNEL), and western blotting were used to evaluate autophagy and apoptosis. First, we observed that white matter development was arrested and white matter fiber maturation was impaired in LPS-inflicted pups compared with those in the sham-operated group. Second, treatment with SC79 reduced the levels of LC3II, caspase 3, caspase 9, and Bax/Bcl-2 and increased the levels of p62, p-Akt, and p-mTOR in the brain tissue of neonatal rats. Finally, SC79 treatment inhibited OPC apoptosis by increasing the binding of Beclin 1 to Bcl-2, which promoted OPC differentiation and maturation. However, the opposite results were observed after rapamycin administration. Taken together, our results suggest that SC79 can inhibit the abnormal apoptosis of OPCs caused by excessive autophagy through the Akt/mTOR pathway and that SC79 is a potential therapeutic agent for WMD in preterm infants.
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Affiliation(s)
- Zhongni Li
- Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, No. 278, Middle Section of Baoguang Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
- Clinic Medical College, Chengdu Medical College, No. 783 Xindu Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
| | - Feng Zhang
- Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, No. 278, Middle Section of Baoguang Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
- Clinic Medical College, Chengdu Medical College, No. 783 Xindu Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
| | - Li Huang
- Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, No. 278, Middle Section of Baoguang Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
- Clinic Medical College, Chengdu Medical College, No. 783 Xindu Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
| | - Jiehong Deng
- Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, No. 278, Middle Section of Baoguang Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
- Clinic Medical College, Chengdu Medical College, No. 783 Xindu Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
| | - Yutong Pan
- Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, No. 278, Middle Section of Baoguang Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
- Clinic Medical College, Chengdu Medical College, No. 783 Xindu Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
| | - Ting Xu
- Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, No. 278, Middle Section of Baoguang Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
- Clinic Medical College, Chengdu Medical College, No. 783 Xindu Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
| | - Jingyi Liu
- Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, No. 278, Middle Section of Baoguang Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
- Clinic Medical College, Chengdu Medical College, No. 783 Xindu Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
| | - Na Gao
- Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, No. 278, Middle Section of Baoguang Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
- Clinic Medical College, Chengdu Medical College, No. 783 Xindu Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
| | - Rongrong Duan
- Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, No. 278, Middle Section of Baoguang Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
- Clinic Medical College, Chengdu Medical College, No. 783 Xindu Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
| | - Chunyan Shao
- Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, No. 278, Middle Section of Baoguang Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
- Clinic Medical College, Chengdu Medical College, No. 783 Xindu Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
| | - Chan Wu
- Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, No. 278, Middle Section of Baoguang Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
- Clinic Medical College, Chengdu Medical College, No. 783 Xindu Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
| | - Minrong Wang
- Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, No. 278, Middle Section of Baoguang Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
- Clinic Medical College, Chengdu Medical College, No. 783 Xindu Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China
| | - Liqun Lu
- Department of Pediatrics, The First Affiliated Hospital of Chengdu Medical College, No. 278, Middle Section of Baoguang Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China.
- Clinic Medical College, Chengdu Medical College, No. 783 Xindu Avenue, Xindu District, Chengdu, 610500, Sichuan Province, People's Republic of China.
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Ning JW, Zang CX, Shang MY, Bao XQ, Zhang D. Natural products and their derivatives alleviating cerebral white matter lesions. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2024; 26:146-153. [PMID: 38419338 DOI: 10.1080/10286020.2024.2301988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 01/02/2024] [Indexed: 03/02/2024]
Abstract
White matter lesions (WMLs), characterized by focal demyelination or myelination disorders, are commonly present in cerebral small vessel disease and various neurological diseases. Multiple etiologies lead to WMLs. However, there is no specific therapy or effective drugs for relieving WMLs. Natural products and their derivatives originate from bacterial, fungal, plant, and marine animal sources, many of which have multiple therapeutic targets. Compared to single target compounds, natural products and their derivatives are promising to be developed as better drugs to attenuate WMLs. Thus, this review attempts to summarize the status of natural products and their derivatives (2010-to date) alleviating cerebral white matter lesions for the discovery of new drugs.
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Affiliation(s)
- Jing-Wen Ning
- State Key Laboratory of Bioactive Substrate and Function of Natural Medicine, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Cai-Xia Zang
- State Key Laboratory of Bioactive Substrate and Function of Natural Medicine, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Mei-Yu Shang
- State Key Laboratory of Bioactive Substrate and Function of Natural Medicine, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Xiu-Qi Bao
- State Key Laboratory of Bioactive Substrate and Function of Natural Medicine, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Dan Zhang
- State Key Laboratory of Bioactive Substrate and Function of Natural Medicine, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
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Huang YT, Hong FF, Yang SL. Atherosclerosis: The Culprit and Co-victim of Vascular Dementia. Front Neurosci 2021; 15:673440. [PMID: 34421513 PMCID: PMC8377286 DOI: 10.3389/fnins.2021.673440] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Accepted: 06/11/2021] [Indexed: 11/24/2022] Open
Abstract
Vascular dementia (VD), a cerebrovascular disease which causes cognitive impairment, is one of the significant factors that affects the quality of senectitude. Atherosclerosis (AS) is a chronic inflammatory syndrome and closely associated with VD. Analyzing the role of AS in VD contribute greatly to its early detection and prevention, but their relationship has not been integrated into a complete network. This review summarizes AS biomarkers as VD predictors for the first time and describes the direct mechanisms of AS causing VD from five aspects: vascular morphogenesis, hemodynamic change, neurovascular unit damage (NVU), oxidative stress, and microRNA (miRNA). Finally, it discriminates the relationship between AS and VD in common risk factors which can be disease or some molecules. In particular, these data imply that the role of AS in VD is not only a pathogenic factor but also a comorbidity in VD. This review aims to bring new ideas for the prediction and treatment of VD.
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Affiliation(s)
- Ya-Ting Huang
- Department of Physiology, College of Medicine, Nanchang University, Nanchang, China.,Queen Marry College, School of Medicine, Nanchang University, Nanchang, China
| | - Fen-Fang Hong
- Experimental Center of Pathogen Biology, Nanchang University, Nanchang, China
| | - Shu-Long Yang
- Department of Physiology, College of Medicine, Nanchang University, Nanchang, China.,Department of Physiology, Fuzhou Medical College, Fuzhou, China
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Lim SH, Lee J. Supplementation with psyllium seed husk reduces myocardial damage in a rat model of ischemia/reperfusion. Nutr Res Pract 2019; 13:205-213. [PMID: 31214288 PMCID: PMC6548711 DOI: 10.4162/nrp.2019.13.3.205] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 03/13/2019] [Accepted: 03/23/2019] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND/OBJECTIVES Myocardial infarction (MI) is caused by extensive myocardial damage attributed to the occlusion of coronary arteries. Our previous study in a rat model of ischemia/reperfusion (I/R) demonstrated that administration of arabinoxylan (AX), comprising arabinose and xylose, protects against myocardial injury. In this study, we undertook to investigate whether psyllium seed husk (PSH), a safe dietary fiber containing a high level of AX (> 50%), also imparts protection against myocardial injury in the same rat model. MATERIALS/METHODS Rats were fed diets supplemented with PSH (1, 10, or 100 mg/kg/d) for 3 d. The rats were then subjected to 30 min ischemia through ligation of the left anterior descending coronary artery, followed by 3 h reperfusion through release of the ligation. The hearts were harvested and cut into four slices. To assess infarct size (IS), an index representing heart damage, the slices were stained with 2,3,5-triphenyltetrazolium chloride (TTC). To elucidate underlying mechanisms, Western blotting was performed for the slices. RESULTS Supplementation with 10 or 100 mg/kg/d of PSH significantly reduces the IS. PSH supplementation (100 mg/kg/d) tends to reduce caspase-3 generation and increase BCL-2/BAX ratio. PSH supplementation also upregulates the expression of nuclear factor erythroid 2-related factor 2 (NRF2), and its target genes including antioxidant enzymes such as glutathione S-transferase mu 2 (GSTM2) and superoxide dismutase 2 (SOD2). PSH supplementation upregulates some sirtuins (NAD+-dependent deacetylases) including SIRT5 (a mitochondrial sirtuin) and SIRT6 and SIRT7 (nuclear sirtuins). Finally, PSH supplementation upregulates the expression of protein kinase A (PKA), and increases phosphorylated cAMP response element-binding protein (CREB) (pCREB), a target protein of PKA. CONCLUSIONS The results from this study indicate that PSH consumption reduces myocardial I/R injury in rats by inhibiting the apoptotic cascades through modulation of gene expression of several genes located upstream of apoptosis. Therefore, we believe that PSH can be developed as a functional food that would be beneficial in the prevention of MI.
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Affiliation(s)
- Sun Ha Lim
- Department of Biochemistry, School of Medicine, Catholic University of Daegu, 33 Duryugongwon-ro 17-gil, Nam-gu, Daegu 42472, Republic of Korea
| | - Jongwon Lee
- Department of Biochemistry, School of Medicine, Catholic University of Daegu, 33 Duryugongwon-ro 17-gil, Nam-gu, Daegu 42472, Republic of Korea
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