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Nie R, Tian H, Zhang W, Li F, Zhang B, Zhang H. NR5A1 and NR5A2 regulate follicle development in chicken (Gallus gallus) by altering proliferation, apoptosis, and steroid hormone synthesis of granulosa cells. Poult Sci 2024; 103:103620. [PMID: 38492249 PMCID: PMC10959722 DOI: 10.1016/j.psj.2024.103620] [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: 12/22/2023] [Revised: 02/22/2024] [Accepted: 03/01/2024] [Indexed: 03/18/2024] Open
Abstract
Chicken ovarian follicle development is regulated by complex and dynamic gene expression. Nuclear receptor 5A1 and 5A2 (NR5A1 and NR5A2, respectively) are key genes that regulate steroid hormone production and gonadal development in mammals; however, studies on follicular development in the chicken ovary are scarce. In this study, we investigated the functions of NR5A1 and NR5A2 on follicle development in chickens. The results showed that the expression of NR5A1 and NR5A2 was significantly higher in small yellow follicles and F5. Furthermore, the expression of NR5A1 and NR5A2 was significantly higher in follicular tissues of peak-laying hens (30 wk) than in follicular tissues of late-laying hens (60 wk), with high expression abundance in granulosa cells (GC). The overexpression of NR5A1 and NR5A2 significantly promoted proliferation and inhibited apoptosis of cultured GC; upregulated STAR, CYP11A1, and CYP19A1 expression and estradiol (E2) and progesterone (P4) synthesis in GC from preovulatory follicles (po-GC); and increased STAR, CYP11A1, and CYP19A1 promoter activities. In addition, follicle-stimulating hormone treatment significantly upregulated NR5A1 and NR5A2 expression in po-GC and significantly promoted FSHR, CYP11A1, and HSD3B1 expression in GC from pre-hierarchical follicles and po-GC. The core promoter region of NR5A1 was identified at the -1,095- to -483-bp and -2,054- to -1,536-bp regions from the translation start site (+1), and the core promoter region of NR5A2 was at -998 to -489 bp. Two single nucleotide polymorphisms (SNP) were identified in the core promoter region of the NR5A1 gene, which differed between high- and low-yielding chicken groups. Our study suggested that NR5A1 and NR5A2 promoted chicken follicle development by promoting GC proliferation and E2 and P4 hormone synthesis and inhibiting apoptosis. Moreover, we identified the promoter core region or functional site that regulates NR5A1 and NR5A2 expression.
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Affiliation(s)
- Ruixue Nie
- State Key Laboratory of Animal Biotech Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Haoyu Tian
- State Key Laboratory of Animal Biotech Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Wenhui Zhang
- State Key Laboratory of Animal Biotech Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Fuwei Li
- Poultry Institute, Shangdong Academy of Agricultural Sciences, Jinan 250100, China
| | - Bo Zhang
- State Key Laboratory of Animal Biotech Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Hao Zhang
- State Key Laboratory of Animal Biotech Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
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Zhang W, Bai SS, Zhang Q, Shi RL, Wang HC, Liu YC, Ni TJ, Wu Y, Yao ZY, Sun Y, Wang MY. Physalin B reduces Aβ secretion through down-regulation of BACE1 expression by activating FoxO1 and inhibiting STAT3 phosphorylation. Chin J Nat Med 2021; 19:732-740. [PMID: 34688463 DOI: 10.1016/s1875-5364(21)60090-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Indexed: 11/18/2022]
Abstract
Physalin B (PB), one of the major active steroidal constituents of Solanaceae Physalis plants, has a wide variety of biological activities. We found that PB significantly down-regulated β-amyloid (Aβ) secretion in N2a/APPsw cells. However, the underlying mechanisms are not well understood. In the current study, we investigated the changes in key enzymes involved in β-amyloid precursor protein (APP) metabolism and other APP metabolites by treating N2a/APPsw cells with PB at different concentrations. The results indicated that PB reduced Aβ secretion, which was caused by down-regulation of β-secretase (BACE1) expression, as indicated at both the protein and mRNA levels. Further research revealed that PB regulated BACE1 expression by inducing the activation of forkhead box O1 (FoxO1) and inhibiting the phosphorylation of signal transducer and activator of transcription 3 (STAT3). In addition, the effect of PB on BACE1 expression and Aβ secretion was reversed by treatment with FoxO1 siRNA and STAT3 antagonist S3I-201. In conclusion, these data demonstrated that PB can effectively down-regulate the expression of BACE1 to reduce Aβsecretion by activating the expression of FoxO1 and inhibiting the phosphorylation of STAT3.
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Affiliation(s)
- Wei Zhang
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang 453003, China
| | - Shan-Shan Bai
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang 453003, China; Central Laboratory, the First Affiliated Hospital of Henan University of Science and Technology, Luoyang 471003, China
| | - Qi Zhang
- Grade 2019, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang 453003, China
| | - Ru-Ling Shi
- School of Public Health, Xinxiang Medical University, Xinxiang 453003, China
| | - He-Cheng Wang
- School of Life and Pharmaceutical Sciences, Dalian University of Technology, Panjin 124221, China
| | - You-Cai Liu
- School of Basic Medical Sciences, Sanquan College of Xinxiang Medical University, Xinxiang 453003, China
| | - Tian-Jun Ni
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang 453003, China
| | - Ying Wu
- School of Nursing Care, Xinxiang Medical University, Xinxiang 453003, China
| | - Zhao-Yang Yao
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang 453003, China
| | - Yi Sun
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Ming-Yong Wang
- School of Laboratory Medicine, Xinxiang Medical University, Xinxiang 453003, China; Xinxiang Key Laboratory of Immunoregulation and Molecular Diagnostics, Xinxiang 453003, China.
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Suh J, Romano DM, Nitschke L, Herrick SP, DiMarzio BA, Dzhala V, Bae JS, Oram MK, Zheng Y, Hooli B, Mullin K, Gennarino VA, Wasco W, Schmahmann JD, Albers MW, Zoghbi HY, Tanzi RE. Loss of Ataxin-1 Potentiates Alzheimer's Pathogenesis by Elevating Cerebral BACE1 Transcription. Cell 2020; 178:1159-1175.e17. [PMID: 31442405 DOI: 10.1016/j.cell.2019.07.043] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 12/21/2018] [Accepted: 07/24/2019] [Indexed: 01/28/2023]
Abstract
Expansion of CAG trinucleotide repeats in ATXN1 causes spinocerebellar ataxia type 1 (SCA1), a neurodegenerative disease that impairs coordination and cognition. While ATXN1 is associated with increased Alzheimer's disease (AD) risk, CAG repeat number in AD patients is not changed. Here, we investigated the consequences of ataxin-1 loss of function and discovered that knockout of Atxn1 reduced CIC-ETV4/5-mediated inhibition of Bace1 transcription, leading to increased BACE1 levels and enhanced amyloidogenic cleavage of APP, selectively in AD-vulnerable brain regions. Elevated BACE1 expression exacerbated Aβ deposition and gliosis in AD mouse models and impaired hippocampal neurogenesis and olfactory axonal targeting. In SCA1 mice, polyglutamine-expanded mutant ataxin-1 led to the increase of BACE1 post-transcriptionally, both in cerebrum and cerebellum, and caused axonal-targeting deficit and neurodegeneration in the hippocampal CA2 region. These findings suggest that loss of ataxin-1 elevates BACE1 expression and Aβ pathology, rendering it a potential contributor to AD risk and pathogenesis.
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Affiliation(s)
- Jaehong Suh
- Genetics and Aging Research Unit, McCance Center for Brain Health, MassGeneral Institute of Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA.
| | - Donna M Romano
- Genetics and Aging Research Unit, McCance Center for Brain Health, MassGeneral Institute of Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
| | - Larissa Nitschke
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, TX 77030, USA; Integrative Molecular and Biomedical Sciences Graduate Program, Baylor College of Medicine, Houston, TX 77030, USA
| | - Scott P Herrick
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
| | - Britt A DiMarzio
- Genetics and Aging Research Unit, McCance Center for Brain Health, MassGeneral Institute of Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
| | - Volodymyr Dzhala
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
| | - Jun-Seok Bae
- Genetics and Aging Research Unit, McCance Center for Brain Health, MassGeneral Institute of Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
| | - Mary K Oram
- Genetics and Aging Research Unit, McCance Center for Brain Health, MassGeneral Institute of Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
| | - Yuejiao Zheng
- Genetics and Aging Research Unit, McCance Center for Brain Health, MassGeneral Institute of Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
| | - Basavaraj Hooli
- Genetics and Aging Research Unit, McCance Center for Brain Health, MassGeneral Institute of Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
| | - Kristina Mullin
- Genetics and Aging Research Unit, McCance Center for Brain Health, MassGeneral Institute of Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
| | - Vincenzo A Gennarino
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, TX 77030, USA
| | - Wilma Wasco
- Genetics and Aging Research Unit, McCance Center for Brain Health, MassGeneral Institute of Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
| | - Jeremy D Schmahmann
- Ataxia Unit, Cognitive Behavioral Neurology Unit, Laboratory for Neuroanatomy and Cerebellar Neurobiology, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Mark W Albers
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA
| | - Huda Y Zoghbi
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, TX 77030, USA; Integrative Molecular and Biomedical Sciences Graduate Program, Baylor College of Medicine, Houston, TX 77030, USA; Howard Hughes Medical Institute, Baylor College of Medicine, Houston, TX 77030, USA.
| | - Rudolph E Tanzi
- Genetics and Aging Research Unit, McCance Center for Brain Health, MassGeneral Institute of Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA.
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Anti-Inflammatory Activities of Marine Algae in Neurodegenerative Diseases. Int J Mol Sci 2019; 20:ijms20123061. [PMID: 31234555 PMCID: PMC6628294 DOI: 10.3390/ijms20123061] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 06/18/2019] [Accepted: 06/19/2019] [Indexed: 12/13/2022] Open
Abstract
Neuroinflammation is one of the main contributors to the onset and progression of neurodegenerative diseases such as Alzheimer’s and Parkinson’s diseases. Microglial and astrocyte activation is a brain defense mechanism to counteract harmful pathogens and damaged tissues, while their prolonged activation induces neuroinflammation that can trigger or exacerbate neurodegeneration. Unfortunately, to date there are no pharmacological therapies able to slow down or stop the progression of neurodegeneration. For this reason, research is turning to the identification of natural compounds with protective action against these diseases. Considering the important role of neuroinflammation in the onset and development of neurodegenerative pathologies, natural compounds with anti-inflammatory activity could be good candidates for developing effective therapeutic strategies. Marine organisms represent a huge source of natural compounds, and among them, algae are appreciated sources of important bioactive components such as antioxidants, proteins, vitamins, minerals, soluble dietary fibers, polyunsaturated fatty acids, polysaccharides, sterols, carotenoids, tocopherols, terpenes, phycobilins, phycocolloids, and phycocyanins. Recently, numerous anti-inflammatory compounds have been isolated from marine algae with potential protective efficacy against neuroinflammation. This review highlights the key inflammatory processes involved in neurodegeneration and the potential of specific compounds from marine algae to counteract neuroinflammation in the CNS.
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Gu MY, Chun YS, Zhao D, Ryu SY, Yang HO. Glycyrrhiza uralensis and Semilicoisoflavone B Reduce Aβ Secretion by Increasing PPARγ Expression and Inhibiting STAT3 Phosphorylation to Inhibit BACE1 Expression. Mol Nutr Food Res 2018; 62:e1700633. [PMID: 29143445 DOI: 10.1002/mnfr.201700633] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Revised: 11/07/2017] [Indexed: 12/19/2022]
Abstract
SCOPE Glycyrrhiza uralensis extract (GUE) has been reported to improve amyloid beta (Aβ)-induced cognitive deficits in mice. However, the mechanisms underlying this effect and the components involved have not been previously explored. Extracellular Aβ plaques are one of the major pathological hallmarks of Alzheimer's disease (AD). Therefore, decreasing Aβ levels is one strategy for preventing the etiology of AD. This study aims to test the effect of GUE and semilicoisoflavone B (SB) on Aβ secretion and investigates the mechanism underlying this effect. METHODS AND RESULTS GUE and its bio-activated compound SB reduce Aβ secretion. We find that this effect contribute to the downregulation of the β-secretase-1 (BACE1) protein and mRNA. In a subsequent mechanism study, we find that GUE and SB regulate BACE1 transcription factors by inducing the expression of peroxisome proliferator activated receptor γ (PPARγ) and inhibiting the phosphorylation of signal transducer and activator of transcription 3. In addition, the effect of GUE and SB on BACE1 expression and Aβ secretion are attenuated by treatment with PPARγ-siRNA or its antagonist, GW9662. CONCLUSION These findings indicate that GUE and SB may function as PPARγ agonists, thereby inhibiting BACE1 expression and ultimately reducing the secretion of Aβ.
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Affiliation(s)
- Ming-Yao Gu
- Natural Products Research Center, Korea Institute of Science and Technology, Gangneung, Gangwon-do, Republic of Korea.,Division of Bio-Medical Science &Technology, KIST School, Korea University of Science and Technology, Seoul, Republic of Korea
| | - Yoon Sun Chun
- Natural Products Research Center, Korea Institute of Science and Technology, Gangneung, Gangwon-do, Republic of Korea
| | - Dong Zhao
- Natural Products Research Center, Korea Institute of Science and Technology, Gangneung, Gangwon-do, Republic of Korea.,Division of Bio-Medical Science &Technology, KIST School, Korea University of Science and Technology, Seoul, Republic of Korea
| | - Shi Yong Ryu
- Research Center for Medicinal Chemistry, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
| | - Hyun Ok Yang
- Natural Products Research Center, Korea Institute of Science and Technology, Gangneung, Gangwon-do, Republic of Korea.,Division of Bio-Medical Science &Technology, KIST School, Korea University of Science and Technology, Seoul, Republic of Korea
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6
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Choi JY, Jang JS, Son DJ, Im HS, Kim JY, Park JE, Choi WR, Han SB, Hong JT. Antarctic Krill Oil Diet Protects against Lipopolysaccharide-Induced Oxidative Stress, Neuroinflammation and Cognitive Impairment. Int J Mol Sci 2017; 18:ijms18122554. [PMID: 29182579 PMCID: PMC5751157 DOI: 10.3390/ijms18122554] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 11/19/2017] [Accepted: 11/22/2017] [Indexed: 12/15/2022] Open
Abstract
Oxidative stress and neuroinflammation are implicated in the development and pathogenesis of Alzheimer’s disease (AD). Here, we investigated the anti-inflammatory and antioxidative effects of krill oil. Oil from Euphausia superba (Antarctic krill), an Antarctic marine species, is rich in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). We examined whether krill oil diet (80 mg/kg/day for one month) prevents amyloidogenesis and cognitive impairment induced by intraperitoneal lipopolysaccharide (LPS) (250 µg/kg, seven times daily) injections in AD mice model and found that krill oil treatment inhibited the LPS-induced memory loss. We also found that krill oil treatment inhibited the LPS-induced expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) and decreased reactive oxygen species (ROS) and malondialdehyde levels. Krill oil also suppresses IκB degradation as well as p50 and p65 translocation into the nuclei of LPS-injected mice brain cells. In association with the inhibitory effect on neuroinflammation and oxidative stress, krill oil suppressed amyloid beta (1–42) peptide generation by the down-regulating APP and BACE1 expression in vivo. We found that eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) (50 and 100 µM) dose-dependently decreased LPS-induced nitric oxide and ROS generation, and COX-2 and iNOS expression as well as nuclear factor-κB activity in cultured microglial BV-2 cells. These results suggest that krill oil ameliorated impairment via anti-inflammatory, antioxidative, and anti-amyloidogenic mechanisms.
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Affiliation(s)
- Ji Yeon Choi
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaemgmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju 28160, Chungbuk, Korea.
| | - Jun Sung Jang
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaemgmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju 28160, Chungbuk, Korea.
| | - Dong Ju Son
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaemgmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju 28160, Chungbuk, Korea.
| | - Hyung-Sik Im
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaemgmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju 28160, Chungbuk, Korea.
| | - Ji Yeong Kim
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaemgmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju 28160, Chungbuk, Korea.
| | - Joung Eun Park
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaemgmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju 28160, Chungbuk, Korea.
| | - Won Rak Choi
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaemgmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju 28160, Chungbuk, Korea.
| | - Sang-Bae Han
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaemgmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju 28160, Chungbuk, Korea.
| | - Jin Tae Hong
- College of Pharmacy and Medical Research Center, Chungbuk National University, 194-31 Osongsaemgmyeong 1-ro, Osong-eup, Heungdeok-gu, Cheongju 28160, Chungbuk, Korea.
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Choi JY, Hwang CJ, Lee HP, Kim HS, Han SB, Hong JT. Inhibitory effect of ethanol extract of Nannochloropsis oceanica on lipopolysaccharide-induced neuroinflammation, oxidative stress, amyloidogenesis and memory impairment. Oncotarget 2017; 8:45517-45530. [PMID: 28489589 PMCID: PMC5542205 DOI: 10.18632/oncotarget.17268] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Accepted: 03/26/2017] [Indexed: 12/20/2022] Open
Abstract
Oxidative stress and neuroinflammation is implicated in the pathogenesis and development of Alzheimer's disease (AD). Here, we investigated the suppressive possibility of ethanol extract of Nannochloropsis oceanica (N. oceanica) on memory deficiency along with the fundamental mechanisms in lipopolysaccharide (LPS)-treated mice model. Among several extracts of 32 marine microalgae, ethanol extract of N. oceanica showed the most significant inhibitory effect on nitric oxide (NO) generation, NF-κB activity and β-secretase activity in cultured BV-2 cells, neuronal cells and Raw 264.7 cells. Ethanol extract of N. oceanica (50, 100 mg/kg) also ameliorated LPS (250 μg/kg)-induced memory impairment. We also found that ethanol extract of N. oceanica inhibited the LPS-induced expression of iNOS and COX-2. Furthermore, the production of reactive oxygen species (ROS), malondialdehyde (MDA) level as well as glutathione (GSH) level was also decreased by treatment of ethanol extract of N.oceanica. The ethanol extract of N. oceanica also suppresses IκB degradation as well as p50 and p65 translocation into the nucleus in LPS-treated mice brain. Associated with the inhibitory effect on neuroinflammation and oxidative stress, ethanol extract of N. oceanica suppressed Aβ1-42 generation through down-regulation of APP and BACE1 expression in in vivo. These results suggest that ethanol extract of N. oceanica ameliorated memory impairment via anti-inflammatory, anti-oxidant and anti-amyloidogenic mechanisms.
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Affiliation(s)
- Ji Yeon Choi
- College of Pharmacy and Medical Research Center, Chungbuk National University, Osong-eup, Heungdeok-gu, Cheongju, Chungbuk 28160, Republic of Korea
| | - Chul Ju Hwang
- College of Pharmacy and Medical Research Center, Chungbuk National University, Osong-eup, Heungdeok-gu, Cheongju, Chungbuk 28160, Republic of Korea
| | - Hee Pom Lee
- College of Pharmacy and Medical Research Center, Chungbuk National University, Osong-eup, Heungdeok-gu, Cheongju, Chungbuk 28160, Republic of Korea
| | - Hee Sik Kim
- Sustainable Bioresource Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Yuseoung, Daejeon 305-806, Republic of Korea
| | - Sang-Bae Han
- College of Pharmacy and Medical Research Center, Chungbuk National University, Osong-eup, Heungdeok-gu, Cheongju, Chungbuk 28160, Republic of Korea
| | - Jin Tae Hong
- College of Pharmacy and Medical Research Center, Chungbuk National University, Osong-eup, Heungdeok-gu, Cheongju, Chungbuk 28160, Republic of Korea
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Shi Z, Hong Y, Zhang K, Wang J, Zheng L, Zhang Z, Hu Z, Han X, Han Y, Chen T, Yao Q, Cui H, Hong W. BAG-1M co-activates BACE1 transcription through NF-κB and accelerates Aβ production and memory deficit in Alzheimer's disease mouse model. Biochim Biophys Acta Mol Basis Dis 2017; 1863:2398-2407. [PMID: 28502705 DOI: 10.1016/j.bbadis.2017.05.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Revised: 05/01/2017] [Accepted: 05/10/2017] [Indexed: 12/13/2022]
Abstract
Accumulation of amyloid β protein (Aβ)-containing neuritic plaques in the brain is a neuropathological feature of Alzheimer's disease (AD). The β-site APP-cleaving enzyme 1 (BACE1) is essential for Aβ generation and dysregulation of BACE1 expression may lead to AD pathogenesis. Bcl-2-associated athanogen 1M (BAG-1M), initially identified as an anti-apoptotic protein, has also been found to be highly expressed in the same neurons that contain intracellular amyloid in the hippocampus of AD patient. In this report, we found that over-expression of BAG-1M enhances BACE1-mediated cleavage of amyloid precursor protein (APP) and Aβ production by up-regulating BACE1 gene transcription. The regulation of BACE1 transcription by BAG-1M was dependent on NF-κB, as BAG-1M complexes NF-κB at the promoter of BACE1 gene and co-activates NF-κB-facilitated BACE1 transcription. Moreover, expression of BAG-1M by lentiviral vector in the hippocampus of AD transgenic model mice promotes Aβ generation and formation of neuritic plaque, and subsequently accelerates memory deficits of the mice. These results provide evidence for an emerging role of BAG-1M in the regulation of BACE1 expression and AD pathogenesis and that targeting the BAG-1M-NF-κB complex may provide a mechanism for inhibiting Aβ production and plaque formation.
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Affiliation(s)
- Zhemin Shi
- Department of Histology and Embryology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Yuheng Hong
- School of Medical Imaging, Tianjin Medical University, Tianjin 300203, China
| | - Kun Zhang
- Department of Histology and Embryology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Jingzhao Wang
- Department of Histology and Embryology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Lina Zheng
- Department of Histology and Embryology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Zhen Zhang
- Department of Histology and Embryology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Zhimei Hu
- Department of Histology and Embryology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Xiaohui Han
- Department of Histology and Embryology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Yawei Han
- Department of Histology and Embryology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Ting Chen
- Department of Histology and Embryology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Qingbin Yao
- Department of Histology and Embryology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Hongmei Cui
- Department of Histology and Embryology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Wei Hong
- Department of Histology and Embryology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China.
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9
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Liu S, Liu H, Qin R, Shu Y, Liu Z, Zhang P, Duan C, Hong D, Yu J, Zou L. The cellular senescence of leukemia-initiating cells from acute lymphoblastic leukemia is postponed by β-Arrestin1 binding with P300-Sp1 to regulate hTERT transcription. Cell Death Dis 2017; 8:e2756. [PMID: 28425985 PMCID: PMC5603829 DOI: 10.1038/cddis.2017.164] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 02/15/2017] [Accepted: 02/16/2017] [Indexed: 01/11/2023]
Abstract
Although we previously reported that the self-renewal of leukemia-initiating cells of B-lineage acute lymphoblastic leukemia (B-ALL LICs) was regulated by β-Arrestin1, a multiple-function protein, the cellular senescence is critical for LICs fate and leukemia progress, and worthy for further investigation. Here we found that depletion of β-Arrestin1 extended the population doubling time and the percentage of senile cells, the signatures of cellular senescence, of B-ALL LICs. Moreover, lack of β-Arrestin1 enhanced the expression of proteins (CBX, HIRA) and genes (P53, P16) related to senescence in leukemic Reh cells and B-ALL-LICs-derived leukemic mice. Further results showed that loss of β-Arrestin1 induced senescence of Reh cells through mediating hTERT-telomerase-telomere axis, which was reversed by BIBR1532, the telomerase activity inhibitor. Importantly, depletion of β-Arrestin1 decreased the binding of Sp1 to hTERT promoter at the region of −28 to −36 bp. The anti-sense oligonucleotide of this key region downregulated the transcription of hTERT and aggravated the senescence of Reh cells. Further data demonstrated that the depleted β-Arrestin1 reduced the interaction of P300 with Sp1, thus to reduce Sp1 binding to hTERT promoter, downregulate hTERT transcription, decrease telomerase activity, shorten telomere length, and promote Reh cell senescence. Interestingly, the percentage of senile cells in B-ALL LICs was decreased, which was negatively correlated to good prognosis and β-Arrestin1 mRNA expression in childhood B-ALL patients. Our study shed a light on the senescence of B-ALL LICs and is regulated by β-Arrestin1, providing the potential therapeutic target of leukemia by promoting cellular senescence with a key region of hTERT promoter.
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Affiliation(s)
- Shan Liu
- Center for Clinical Molecular Medicine, Children's Hospital, Chongqing Medical Universtiy, Chongqing 400014, China.,Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing 400014, China.,Key Laboratory of Pediatrics in Chongqing, Chongqing 400014, China
| | - Haiyan Liu
- Center for Clinical Molecular Medicine, Children's Hospital, Chongqing Medical Universtiy, Chongqing 400014, China.,Key Laboratory of Pediatrics in Chongqing, Chongqing 400014, China.,Division of Hematology, Children's Hospital, Chongqing Medical University, Chongqing 400014, China
| | - Ru Qin
- Center for Clinical Molecular Medicine, Children's Hospital, Chongqing Medical Universtiy, Chongqing 400014, China.,Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing 400014, China.,Key Laboratory of Pediatrics in Chongqing, Chongqing 400014, China.,Center for Clinical Laboratory Medicine, Children's Hospital, Chongqing Medical Universtiy, Chongqing 400014, China
| | - Yi Shu
- Center for Clinical Molecular Medicine, Children's Hospital, Chongqing Medical Universtiy, Chongqing 400014, China.,Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing 400014, China.,Key Laboratory of Pediatrics in Chongqing, Chongqing 400014, China
| | - Zhidai Liu
- Center for Clinical Molecular Medicine, Children's Hospital, Chongqing Medical Universtiy, Chongqing 400014, China.,Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing 400014, China.,Key Laboratory of Pediatrics in Chongqing, Chongqing 400014, China
| | - Penghui Zhang
- Center for Clinical Molecular Medicine, Children's Hospital, Chongqing Medical Universtiy, Chongqing 400014, China.,Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing 400014, China.,Center for Clinical Laboratory Medicine, Children's Hospital, Chongqing Medical Universtiy, Chongqing 400014, China
| | - Caiwen Duan
- Key Laboratory of Cell Differentiation and Apoptosis, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Dengli Hong
- Key Laboratory of Cell Differentiation and Apoptosis, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Jie Yu
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing 400014, China.,Key Laboratory of Pediatrics in Chongqing, Chongqing 400014, China.,Division of Hematology, Children's Hospital, Chongqing Medical University, Chongqing 400014, China
| | - Lin Zou
- Center for Clinical Molecular Medicine, Children's Hospital, Chongqing Medical Universtiy, Chongqing 400014, China.,Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing 400014, China.,Key Laboratory of Pediatrics in Chongqing, Chongqing 400014, China.,Chongqing Stem Cell Therapy Engineering Technical Research Center, Chongqing 400014, China
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Zeng H, Huang P, Wang X, Wu J, Wu M, Huang J. Galangin-induced down-regulation of BACE1 by epigenetic mechanisms in SH-SY5Y cells. Neuroscience 2015; 294:172-81. [PMID: 25779965 DOI: 10.1016/j.neuroscience.2015.02.054] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 01/22/2015] [Accepted: 02/06/2015] [Indexed: 11/19/2022]
Abstract
Alzheimer's disease (AD), the most common cause of dementia in aging people, is found to have a critical link with the deposition of β-amyloid (Aβ) in the brain. The inhibition of β-site amyloid precursor protein-cleaving enzyme 1 (BACE1), a key enzyme for Aβ production, is a promising target for AD therapy. In pursuit to find a potent inhibitor of BACE1, we identified galangin, a natural flavonoid, had a significant lowering effect on Aβ levels. Furthermore, a dramatic reduction of BACE1 at mRNA and protein levels was observed after galangin treatment. We further investigated whether epigenetic mechanisms, such as histone acetylation and DNA methylation, were involved in galangin-induced transcriptional regulation of BACE1. Our data show that galangin induces a decrease of acetylated H3 in the BACE1 promoter regions through the up-regulation of endogenous HDAC1-mediated deacetylation, which is independent of DNA methylation status. The above findings suggest a novel mechanism for polyphenols' neuroprotective effect in neurodegeneration and galangin as a potential drug candidate for AD therapy.
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Affiliation(s)
- H Zeng
- College of Life Sciences, Wuhan University, Wuhan, Hubei 430072, China
| | - P Huang
- College of Life Sciences, Wuhan University, Wuhan, Hubei 430072, China
| | - X Wang
- College of Life Sciences, Wuhan University, Wuhan, Hubei 430072, China
| | - J Wu
- College of Life Sciences, Wuhan University, Wuhan, Hubei 430072, China
| | - M Wu
- College of Life Sciences, Wuhan University, Wuhan, Hubei 430072, China
| | - J Huang
- College of Life Sciences, Wuhan University, Wuhan, Hubei 430072, China.
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