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Sousa D, Pereira SS, Pignatelli D. Modulation of Autophagy in Adrenal Tumors. Front Endocrinol (Lausanne) 2022; 13:937367. [PMID: 35966083 PMCID: PMC9373848 DOI: 10.3389/fendo.2022.937367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 06/15/2022] [Indexed: 01/18/2023] Open
Abstract
Adrenal masses are one of the most common tumors in humans. The majority are benign and non-functioning and therefore do not require immediate treatment. In contrast, the rare adrenal malignant tumors are often highly aggressive and with poor prognosis. Besides usually being detected in advanced stages, often already with metastases, one of the reasons of the unfavorable outcome of the patients with adrenal cancer is the absence of effective treatments. Autophagy is one of the intracellular pathways targeted by several classes of chemotherapeutics. Mitotane, the most commonly used drug for the treatment of adrenocortical carcinoma, was recently shown to also modulate autophagy. Autophagy is a continuous programmed cellular process which culminates with the degradation of cellular organelles and proteins. However, being a dynamic mechanism, understanding the autophagic flux can be highly complex. The role of autophagy in cancer has been described paradoxically: initially described as a tumor pro-survival mechanism, different studies have been showing that it may result in other outcomes, namely in tumor cell death. In adrenal tumors, this dual role of autophagy has also been addressed in recent years. Studies reported both induction and inhibition of autophagy as a treatment strategy of adrenal malignancies. Importantly, most of these studies were performed using cell lines. Consequently clinical studies are still required. In this review, we describe what is known about the role of autophagy modulation in treatment of adrenal tumors. We will also highlight the aspects that need further evaluation to understand the paradoxical role of autophagy in adrenal tumors.
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Affiliation(s)
- Diana Sousa
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- Cancer Signaling & Metabolism Group, IPATIMUP- Institute of Molecular Pathology and Immunology of the University of Porto, Porto, Portugal
| | - Sofia S. Pereira
- Unidade Multidisciplinar de Investigação Biomédica (UMIB), Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto, Porto, Portugal
- ITR - Laboratory for Integrative and Translational Research in Population Health, Porto, Portugal
| | - Duarte Pignatelli
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- Cancer Signaling & Metabolism Group, IPATIMUP- Institute of Molecular Pathology and Immunology of the University of Porto, Porto, Portugal
- Department of Endocrinology, Centro Hospitalar e Universitário de S. João, Porto, Portugal
- Department of Biomedicine, Faculty of Medicine of the University of Porto, Porto, Portugal
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2
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Gupta C, Xu J, Jin T, Khullar S, Liu X, Alatkar S, Cheng F, Wang D. Single-cell network biology characterizes cell type gene regulation for drug repurposing and phenotype prediction in Alzheimer's disease. PLoS Comput Biol 2022; 18:e1010287. [PMID: 35849618 PMCID: PMC9333448 DOI: 10.1371/journal.pcbi.1010287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 07/28/2022] [Accepted: 06/07/2022] [Indexed: 12/03/2022] Open
Abstract
Dysregulation of gene expression in Alzheimer's disease (AD) remains elusive, especially at the cell type level. Gene regulatory network, a key molecular mechanism linking transcription factors (TFs) and regulatory elements to govern gene expression, can change across cell types in the human brain and thus serve as a model for studying gene dysregulation in AD. However, AD-induced regulatory changes across brain cell types remains uncharted. To address this, we integrated single-cell multi-omics datasets to predict the gene regulatory networks of four major cell types, excitatory and inhibitory neurons, microglia and oligodendrocytes, in control and AD brains. Importantly, we analyzed and compared the structural and topological features of networks across cell types and examined changes in AD. Our analysis shows that hub TFs are largely common across cell types and AD-related changes are relatively more prominent in some cell types (e.g., microglia). The regulatory logics of enriched network motifs (e.g., feed-forward loops) further uncover cell type-specific TF-TF cooperativities in gene regulation. The cell type networks are also highly modular and several network modules with cell-type-specific expression changes in AD pathology are enriched with AD-risk genes. The further disease-module-drug association analysis suggests cell-type candidate drugs and their potential target genes. Finally, our network-based machine learning analysis systematically prioritized cell type risk genes likely involved in AD. Our strategy is validated using an independent dataset which showed that top ranked genes can predict clinical phenotypes (e.g., cognitive impairment) of AD with reasonable accuracy. Overall, this single-cell network biology analysis provides a comprehensive map linking genes, regulatory networks, cell types and drug targets and reveals cell-type gene dysregulation in AD.
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Affiliation(s)
- Chirag Gupta
- Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Jielin Xu
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Ting Jin
- Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Saniya Khullar
- Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Xiaoyu Liu
- Department of Statistics, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Sayali Alatkar
- Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Computer Sciences, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Feixiong Cheng
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
- Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, Ohio, United States of America
- Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio, United States of America
| | - Daifeng Wang
- Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Department of Computer Sciences, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
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3
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Low-molecular-weight chondroitin sulfate attenuated injury by inhibiting oxidative stress in amyloid β-treated SH-SY5Y cells. Neuroreport 2019; 29:1174-1179. [PMID: 29985831 DOI: 10.1097/wnr.0000000000001092] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The neurotoxicity of aggregated amyloid β (Aβ) has been implicated as a critical cause in the pathogenesis of Alzheimer's disease. In a previous work, we have shown that low-molecular-weight chondroitin sulfate (LMWCS), a derivative of chondroitin sulfate, protected the SH-SY5Y neuroblastoma cells from Aβ25-35-induced neurotoxicity, decreased intracellular reactive oxygen species level and inhibited the cell apoptosis. However, the underlying mechanism of the antioxidative effect of LMWCS in the SH-SY5Y cells has not been well explored. In the present study, the SH-SY5Y cells were cultured and exposed to 30 μM Aβ25-35 in the absence or presence of LMWCS (50, 100 and 200 μg/ml). Results indicate that incubation of cells with LMWCS before Aβ25-35 exposure increased superoxide dismutase, glutathione peroxidase and Na/K-ATPase activities and decreased the malondialdehyde content. In addition, LMWCS inhibited the imbalance of Bcl-2 and Bax and decreased caspase-3 and caspase-9 expressions. LMWCS antagonizes Aβ25-35-induced neurotoxicity by attenuating oxidative stress, and our results suggest that LMWCS might be used as a potential compound for Alzheimer's disease prevention.
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Sulima SO, Kampen KR, Vereecke S, Pepe D, Fancello L, Verbeeck J, Dinman JD, De Keersmaecker K. Ribosomal Lesions Promote Oncogenic Mutagenesis. Cancer Res 2018; 79:320-327. [PMID: 30482776 DOI: 10.1158/0008-5472.can-18-1987] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 10/17/2018] [Accepted: 11/20/2018] [Indexed: 12/22/2022]
Abstract
Ribosomopathies are congenital disorders caused by mutations in ribosomal proteins (RP) or assembly factors and are characterized by cellular hypoproliferation at an early stage. Paradoxically, many of these disorders have an elevated risk to progress to hyperproliferative cancer at a later stage. In addition, somatic RP mutations have recently been identified in various cancer types, for example, the recurrent RPL10-R98S mutation in T-cell acute lymphoblastic leukemia (T-ALL) and RPS15 mutations in chronic lymphocytic leukemia (CLL). We previously showed that RPL10-R98S promotes expression of oncogenes, but also induces a proliferative defect due to elevated oxidative stress. In this study, we demonstrate that this proliferation defect is eventually rescued by RPL10-R98S mouse lymphoid cells that acquire 5-fold more secondary mutations than RPL10-WT cells. The presence of RPL10-R98S and other RP mutations also correlated with a higher mutational load in patients with T-ALL, with an enrichment in NOTCH1-activating lesions. RPL10-R98S-associated cellular oxidative stress promoted DNA damage and impaired cell growth. Expression of NOTCH1 eliminated these phenotypes in RPL10-R98S cells, in part via downregulation of PKC-θ, with no effect on RPL10-WT cells. Patients with RP-mutant CLL also demonstrated a higher mutational burden, enriched for mutations that may diminish oxidative stress. We propose that oxidative stress due to ribosome dysfunction causes hypoproliferation and cellular insufficiency in ribosomopathies and RP-mutant cancer. This drives surviving cells, potentiated by genomic instability, to acquire rescuing mutations, which ultimately promote transition to hyperproliferation. SIGNIFICANCE: Ribosomal lesions cause oxidative stress and increase mutagenesis, promoting acquisition of rescuing mutations that stimulate proliferation.
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Affiliation(s)
- Sergey O Sulima
- Department of Oncology, KU Leuven, LKI - Leuven Cancer Institute, Leuven, Belgium
| | - Kim R Kampen
- Department of Oncology, KU Leuven, LKI - Leuven Cancer Institute, Leuven, Belgium
| | - Stijn Vereecke
- Department of Oncology, KU Leuven, LKI - Leuven Cancer Institute, Leuven, Belgium
| | - Daniele Pepe
- Department of Oncology, KU Leuven, LKI - Leuven Cancer Institute, Leuven, Belgium
| | - Laura Fancello
- Department of Oncology, KU Leuven, LKI - Leuven Cancer Institute, Leuven, Belgium
| | - Jelle Verbeeck
- Department of Oncology, KU Leuven, LKI - Leuven Cancer Institute, Leuven, Belgium
| | - Jonathan D Dinman
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland
| | - Kim De Keersmaecker
- Department of Oncology, KU Leuven, LKI - Leuven Cancer Institute, Leuven, Belgium.
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Li B, Duan P, Han X, Yan W, Xing Y. NICD inhibits cell proliferation and promotes apoptosis and autophagy in PC12 cells. Mol Med Rep 2017; 16:2755-2760. [PMID: 28677782 DOI: 10.3892/mmr.2017.6878] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 04/10/2017] [Indexed: 11/05/2022] Open
Abstract
Pheochromocytoma is a tumor of the adrenal medulla for which surgical resection is the only therapy. Though the Notch1 signaling pathway has been suggested as a target for pheochromocytoma treatment, the effect of Notch1 intracellular domain (NICD) on pheochromocytoma cell growth remains unknown. In the present study, the effect of NICD on pheochromocytoma cell growth was examined, by use of a tetracycline‑inducible system for NICD overexpression in the PC12 pheochromocytoma cell line. Flow cytometry was used to determine the effect of NICD on cell cycle phase distribution and apoptosis in PC12 cells. Protein expression levels of microtubule associated protein 1 light chain 3 B (LC3B), Beclin 1, autophagy‑related (ATG) 5 and ATG7 were examined using western blot analysis. Untreated PC12 cells lack NICD expression, while treatment with doxycycline resulted in a significant NICD overexpression. NICD overexpression promoted cell apoptosis and suppressed cell proliferation via regulating S‑phase arrest. In addition, NICD overexpression stimulated the expression of autophagy‑related proteins LC3B, Beclin 1, ATG5 and ATG7. In conclusion, NICD promoted cell apoptosis, suppressed cell proliferation, and stimulated autophagy‑related protein expression in PC12 cells. The present data indicate that overexpression of NICD may be a promising potential therapy for pheochromocytoma.
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Affiliation(s)
- Bo Li
- Department of Physiology, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China
| | - Ping Duan
- Department of Physiology, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China
| | - Xuefei Han
- Stem Cell Research Center, Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Wenhai Yan
- Department of Pathophysiology, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China
| | - Ying Xing
- Department of Physiology, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China
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Alemany S, Vilor-Tejedor N, Bustamante M, Pujol J, Macià D, Martínez-Vilavella G, Fenoll R, Alvárez-Pedrerol M, Forns J, Júlvez J, Suades-González E, Llop S, Rebagliato M, Sunyer J. A Genome-Wide Association Study of Attention Function in a Population-Based Sample of Children. PLoS One 2016; 11:e0163048. [PMID: 27656889 PMCID: PMC5033492 DOI: 10.1371/journal.pone.0163048] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 09/01/2016] [Indexed: 01/19/2023] Open
Abstract
Background Attention function filters and selects behaviorally relevant information. This capacity is impaired in some psychiatric disorders and has been proposed as an endophenotype for Attention-Deficit/Hyperactivity Disorder; however, its genetic basis remains largely unknown. This study aimed to identify single nucleotide polymorphism (SNPs) associated with attention function. Materials and Methods The discovery sample included 1655 children (7–12 years) and the replication sample included 546 children (5–8 years). Five attention outcomes were assessed using the computerized Attentional Network Test (ANT): alerting, orienting, executive attention, Hit Reaction time (HRT) and the standard error of HRT (HRTSE). A Genome-wide Association Study was conducted for each outcome. Gene set enrichment analyses were performed to detect biological pathways associated with attention outcomes. Additional neuroimaging analyses were conducted to test neural effects of detected SNPs of interest. Results Thirteen loci showed suggestive evidence of association with attention function (P<10−5) in the discovery sample. One of them, the rs4321351 located in the PID1 gene, was nominally significant in the replication sample although it did not survive multiple testing correction. Neuroimaging analysis revealed a significant association between this SNP and brain structure and function involving the frontal-basal ganglia circuits. The mTOR signaling and Alzheimer disease-amyloid secretase pathways were significantly enriched for alerting, orienting and HRT respectively (FDR<5%). Conclusion These results suggest for the first time the involvement of the PID1 gene, mTOR signaling and Alzheimer disease-amyloid secretase pathways, in attention function during childhood. These genes and pathways have been proposed to play a role in neuronal plasticity, memory and neurodegenerative disease.
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Affiliation(s)
- Silvia Alemany
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiology and Public Health (CIBERESP), Barcelona, Spain
- * E-mail:
| | - Natàlia Vilor-Tejedor
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiology and Public Health (CIBERESP), Barcelona, Spain
| | - Mariona Bustamante
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiology and Public Health (CIBERESP), Barcelona, Spain
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Jesús Pujol
- MRI Research Unit, Department of Radiology, Hospital del Mar, Barcelona, Spain
- Centro Investigación Biomédica en Red de Salud Mental, CIBERSAM G21, Barcelona, Spain
| | - Dídac Macià
- MRI Research Unit, Department of Radiology, Hospital del Mar, Barcelona, Spain
| | | | - Raquel Fenoll
- MRI Research Unit, Department of Radiology, Hospital del Mar, Barcelona, Spain
| | - Mar Alvárez-Pedrerol
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiology and Public Health (CIBERESP), Barcelona, Spain
| | - Joan Forns
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiology and Public Health (CIBERESP), Barcelona, Spain
- Department of Genes and Environment, Division of Epidemiology, Norwegian Institute of Public Health, Oslo, Norway
| | - Jordi Júlvez
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiology and Public Health (CIBERESP), Barcelona, Spain
| | - Elisabet Suades-González
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiology and Public Health (CIBERESP), Barcelona, Spain
- Learning Disabilities Unit (UTAE); Neuropediatrics Department, Hospital de Sant Joan de Déu, Universitat de Barcelona, Barcelona, Spain
| | - Sabrina Llop
- CIBER Epidemiology and Public Health (CIBERESP), Barcelona, Spain
- Epidemiology and Environmental Health Joint Research Unit, FISABIO−Universitat Jaume I−Universitat de València, Valencia, Spain
| | - Marisa Rebagliato
- CIBER Epidemiology and Public Health (CIBERESP), Barcelona, Spain
- Epidemiology and Environmental Health Joint Research Unit, FISABIO−Universitat Jaume I−Universitat de València, Valencia, Spain
- University Jaime I (UJI), Castellón, Spain
| | - Jordi Sunyer
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiology and Public Health (CIBERESP), Barcelona, Spain
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
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Cai Z, Zhao B, Deng Y, Shangguan S, Zhou F, Zhou W, Li X, Li Y, Chen G. Notch signaling in cerebrovascular diseases (Review). Mol Med Rep 2016; 14:2883-98. [PMID: 27574001 PMCID: PMC5042775 DOI: 10.3892/mmr.2016.5641] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Accepted: 07/22/2016] [Indexed: 12/30/2022] Open
Abstract
The Notch signaling pathway is a crucial regulator of numerous fundamental cellular processes. Increasing evidence suggests that Notch signaling is involved in inflammation and oxidative stress, and thus in the progress of cerebrovascular diseases. In addition, Notch signaling in cerebrovascular diseases is associated with apoptosis, angiogenesis and the function of blood-brain barrier. Despite the contradictory results obtained to date as to whether Notch signaling is harmful or beneficial, the regulation of Notch signaling may provide a novel strategy for the treatment of cerebrovascular diseases.
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Affiliation(s)
- Zhiyou Cai
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Bin Zhao
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Yanqing Deng
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Shouqin Shangguan
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Faming Zhou
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Wenqing Zhou
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Xiaoli Li
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Yanfeng Li
- Department of Neurology, Peking Union Medical College Hospital, Beijing 100730, P.R. China
| | - Guanghui Chen
- Department of Neurology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
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Zhang YZ, Lou JY, Bai HY, Wang YL, Li JF, Yin HL. Protective effect of bone marrow mesenchymal stem cells on PC12 cells apoptosis mediated by TAG1. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2015; 8:12093-12100. [PMID: 26722394 PMCID: PMC4680339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 09/22/2015] [Indexed: 06/05/2023]
Abstract
OBJECTIVE This study aims to explore the protection effect of bone marrow mesenchymal stem cells (BMSCs) on PC12 cells apoptosis mediated by transient axonal glycoprotein 1 (TAG1). METHODS PC12 cells were divided into control group, Aβ25-35 group and BMSCs + Aβ25-35 group. The effects of BMSCs on PC12 cells treated by Aβ25-35 were detected using MTT, Hoechst 33258 and Annexin V-FITC/PI staining methods. The expression levels of TAG1, β-amyloid precursor protein (APP), AICD and p53 were determined by RT-PCR and Western blotting methods. The expression levels of Bax and Bcl-2 were determined by Western blotting method. The activity of Caspase 3 was detected by spectrophotometric method. RESULTS MTT results showed that cell activity decreased after the treatment of 20 μM Aβ25-35 for 48 h (P<0.01) while it increased in BMSCs + Aβ25-35 group (P<0.01). Hoechst 33258 and Annexin V-FITC/PI staining results showed that Aβ25-35 could induce the apoptosis of PC12 cells while the apoptosis of PC12 cells was inhibited in BMSCs + Aβ25-35 group. RT-PCR and Western blotting methods showed that 20 μM Aβ25-35 could increase the expression levels of TAG1, APP, AICD and p53 (P<0.01) while they decreased in BMSCs + Aβ25-35 group (P<0.01). 20 μM Aβ25-35 could increase the expression levels of Bax and decrease the expression levels of Bcl-2 (P<0.01), while the expression levels of Bax decreased and the expression levels of Bcl-2 increase in BMSCs + Aβ25-35 group (P<0.01). 20 μM Aβ25-35 could enhance Caspase 3 activity while it decreased in BMSCs + Aβ25-35 group (P<0.01). Conclusions BMSCs with Aβ25-35 could inhibit the apoptosis of PC12 cells, which maybe related with TAG1/APP/AICD signal pathway.
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Affiliation(s)
- Yu-Zhen Zhang
- Department of Neurology, The Second Affiliated Hospital of Zhengzhou UniversityZhengzhou, P. R. China
| | - Ji-Yu Lou
- Department of Neurology, The Second Affiliated Hospital of Zhengzhou UniversityZhengzhou, P. R. China
| | - Hong-Ying Bai
- Department of Neurology, The Second Affiliated Hospital of Zhengzhou UniversityZhengzhou, P. R. China
| | - Yun-Liang Wang
- Department of Neurology, 148 Hospital of PLAZibo, P. R. China
| | - Jin-Feng Li
- Department of Neurology, 148 Hospital of PLAZibo, P. R. China
| | - Hong-Lei Yin
- Department of Neurology, 148 Hospital of PLAZibo, P. R. China
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9
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Influence of Jagged1 on apoptosis-related gene expression: a microarray database analysis. Genes Genomics 2015. [DOI: 10.1007/s13258-015-0316-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Lamoke F, Mazzone V, Persichini T, Maraschi A, Harris MB, Venema RC, Colasanti M, Gliozzi M, Muscoli C, Bartoli M, Mollace V. Amyloid β peptide-induced inhibition of endothelial nitric oxide production involves oxidative stress-mediated constitutive eNOS/HSP90 interaction and disruption of agonist-mediated Akt activation. J Neuroinflammation 2015; 12:84. [PMID: 25935150 PMCID: PMC4438457 DOI: 10.1186/s12974-015-0304-x] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 04/21/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Amyloid β (Aβ)-induced vascular dysfunction significantly contributes to the pathogenesis of Alzheimer's disease (AD). Aβ is known to impair endothelial nitric oxide synthase (eNOS) activity, thus inhibiting endothelial nitric oxide production (NO). METHOD In this study, we investigated Aβ-effects on heat shock protein 90 (HSP90) interaction with eNOS and Akt in cultured vascular endothelial cells and also explored the role of oxidative stress in this process. RESULTS Treatments of endothelial cells (EC) with Aβ promoted the constitutive association of HSP90 with eNOS but abrogated agonist (vascular endothelial growth factor (VEGF))-mediated HSP90 interaction with Akt. This effect resulted in blockade of agonist-mediated phosphorylation of Akt and eNOS at serine 1179. Furthermore, Aβ stimulated the production of reactive oxygen species in endothelial cells and concomitant treatments of the cells with the antioxidant N-acetyl-cysteine (NAC) prevented Aβ effects in promoting HSP90/eNOS interaction and rescued agonist-mediated Akt and eNOS phosphorylation. CONCLUSIONS The obtained data support the hypothesis that oxidative damage caused by Aβ results in altered interaction of HSP90 with Akt and eNOS, therefore promoting vascular dysfunction. This mechanism, by contributing to Aβ-mediated blockade of nitric oxide production, may significantly contribute to the cognitive impairment seen in AD patients.
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Affiliation(s)
- Folami Lamoke
- Department of Ophthalmology, Georgia Regents University, Health Sciences Campus, 1120 15th St., Augusta, GA, 30912, USA.
| | - Valeria Mazzone
- Department of Biology, University of Rome 'Roma Tre', Via Ostiense, 169, Rome, 00154, Italy.
| | - Tiziana Persichini
- Department of Biology, University of Rome 'Roma Tre', Via Ostiense, 169, Rome, 00154, Italy.
| | - Annamaria Maraschi
- Department of Neurology and Laboratory of Neuroscience, IRCCS Istituto Auxologico Italiano, Cusano Milanino 20095, Milan, Italy.
| | - Michael Brennan Harris
- Department of Kinesiology, College of William and Mary, 200 Stadium Dr., Williamsburg, VA, 23186, USA.
| | - Richard C Venema
- Vascular Biology Center, Georgia Regents University, 1120 15th St., Augusta, GA, 30912, USA.
| | - Marco Colasanti
- Department of Biology, University of Rome 'Roma Tre', Via Ostiense, 169, Rome, 00154, Italy.
| | - Micaela Gliozzi
- IRC-FSH, Department of Health Sciences, University of Catanzaro 'Magna Graecia', Catanzaro Complesso 'Ninì Barbieri', Roccelletta di Borgia, 88021, Italy.
| | - Carolina Muscoli
- IRC-FSH, Department of Health Sciences, University of Catanzaro 'Magna Graecia', Catanzaro Complesso 'Ninì Barbieri', Roccelletta di Borgia, 88021, Italy. .,IRCCS San Raffaele Pisana, Via di Val Cannuta, 247, 00166, Rome, Italy.
| | - Manuela Bartoli
- Department of Ophthalmology, Georgia Regents University, Health Sciences Campus, 1120 15th St., Augusta, GA, 30912, USA.
| | - Vincenzo Mollace
- IRC-FSH, Department of Health Sciences, University of Catanzaro 'Magna Graecia', Catanzaro Complesso 'Ninì Barbieri', Roccelletta di Borgia, 88021, Italy. .,IRCCS San Raffaele Pisana, Via di Val Cannuta, 247, 00166, Rome, Italy.
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