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Fatima A, Connaughton RM, Weiser A, Murphy AM, O'Grada C, Ryan M, Brennan L, O'Gaora P, Roche HM. Weighted Gene Co-Expression Network Analysis Identifies Gender Specific Modules and Hub Genes Related to Metabolism and Inflammation in Response to an Acute Lipid Challenge. Mol Nutr Food Res 2017; 62. [PMID: 28952191 DOI: 10.1002/mnfr.201700388] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 08/24/2017] [Indexed: 01/16/2023]
Abstract
SCOPE Inflammation is characteristic of diet-related diseases including obesity and type 2 diabetes (T2D). However, biomarkers of inflammation that reflect the early stage metabolic derangements are not optimally sensitive. Lipid challenges elicit postprandial inflammatory and metabolic responses. Gender-specific transcriptomic networks of the peripheral blood mononuclear cell (PBMC) were constructed in response to a lipid challenge. METHODS AND RESULTS Eighty-six adult males and females of comparable age, anthropometric, and biochemical profiles completed an oral lipid tolerance test (OLTT). PBMC transcriptome was profiled following OLTT. Weighted gene coexpression networks were constructed separately for males and females. Functional ontology analysis of network modules was performed and hub genes identified. Two modules of interest were identified in females-an "inflammatory" module and an "energy metabolism" module. NLRP3, which plays a central role in inflammation and STARD3 that is involved in cholesterol metabolism, were identified as hub genes for the respective modules. CONCLUSION The OLTT induced some gender-specific correlations of gene coexpression network modules. In females, biological processes relating to energy metabolism and inflammation pathways were evident. This suggests a gender specific link between inflammation and energy metabolism in response to lipids. In contrast, G-protein coupled receptor protein signaling pathway was common to both genders.
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Affiliation(s)
- Attia Fatima
- Nutrigenomics Research Group, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Republic of Ireland.,National Center for Bioinformatics, Quaid-i-Azam University, Islamabad, Pakistan
| | - Ruth M Connaughton
- Nutrigenomics Research Group, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Republic of Ireland.,Institute of Food and Health, University College Dublin, Dublin 4, Republic of Ireland
| | - Anna Weiser
- Nutrigenomics Research Group, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Republic of Ireland.,Nutritional Physiology, Technische Universität München, 85354, Freising, Germany
| | - Aoife M Murphy
- Nutrigenomics Research Group, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Republic of Ireland.,Institute of Food and Health, University College Dublin, Dublin 4, Republic of Ireland
| | - Colm O'Grada
- Nutrigenomics Research Group, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Republic of Ireland
| | - Miriam Ryan
- Institute of Food and Health, University College Dublin, Dublin 4, Republic of Ireland
| | - Lorraine Brennan
- Institute of Food and Health, University College Dublin, Dublin 4, Republic of Ireland
| | - Peadar O'Gaora
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Republic of Ireland
| | - Helen M Roche
- Nutrigenomics Research Group, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Republic of Ireland.,Institute of Food and Health, University College Dublin, Dublin 4, Republic of Ireland
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Ran X, Zhang G, Li S, Wang J. Characterization and antitumor activity of camptothecin from endophytic fungus Fusarium solani isolated from Camptotheca acuminate. Afr Health Sci 2017; 17:566-574. [PMID: 29062355 DOI: 10.4314/ahs.v17i2.34] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Camptothecin (CPT) is a potent drug against cancers, originally from plants. The endophytic fungi could produce the secondary metabolite same as the host and is used as medicine. OBJECTIVES The aim of this paper was to investigate an endophytic fungal CPT with anti-neoplastic activity. METHODS Endophytic fungi were isolated from Camptotheca acuminata in China. CPT from strain S-019 was characterized by TLC, HPLC and EI-MS analysis. Anti-tumor activity of fungal CPT was detected by MTT and fluorescent dye methods using Vero and PC-3 cells. RESULTS A total of 94 endophytic fungi strains were isolated from tissues of C. acuminata and 16 fungi strains displayed cytotoxic activity on Vero or PC3 cells. Of which, the fungal strain S-019, classified as Fusarium solani, displayed impressive cytotoxic activity on cancer cells and was found to produce CPT by analysis of TLC, HPLC and EI-MS methods. Bioassay studies confirmed that the fungi CPT had potent cytotoxicity on Vero cells and induced apoptosis of Vero cells. CONCLUSION The endophytic fungi from camptotheca trees are a reliable source for natural anticancer compounds. The endophytic fungi could produce CPT same as plant. The fungal CPT exhibited effective activity at inhibiting cell growth and inducing apoptosis on Vero cells.
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3
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Zhao X, Tao X, Xu L, Yin L, Qi Y, Xu Y, Han X, Peng J. Dioscin Induces Apoptosis in Human Cervical Carcinoma HeLa and SiHa Cells through ROS-Mediated DNA Damage and the Mitochondrial Signaling Pathway. Molecules 2016; 21:molecules21060730. [PMID: 27271587 PMCID: PMC6273920 DOI: 10.3390/molecules21060730] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Revised: 05/24/2016] [Accepted: 05/31/2016] [Indexed: 11/16/2022] Open
Abstract
Dioscin, a natural product, has activity against glioblastoma multiforme, lung cancer and colon cancer. In this study, the effects of dioscin against human cervical carcinoma HeLa and SiHa cells were further confirmed, and the possible mechanism(s) were investigated. A transmission electron microscopy (TEM) assay and DAPI staining were used to detect the cellular morphology. Flow cytometry was used to assay cell apoptosis, ROS and Ca(2+) levels. Single cell gel electrophoresis and immunofluorescence assays were used to test DNA damage and cytochrome C release. The results showed that dioscin significantly inhibited cell proliferation and caused DNA damage in HeLa and SiHa cells. The mechanistic investigation showed that dioscin caused the release of cytochrome C from mitochondria into the cytosol. In addition, dioscin significantly up-regulated the protein levels of Bak, Bax, Bid, p53, caspase-3, caspase-9, and down-regulated the protein levels of Bcl-2 and Bcl-xl. Our work thus demonstrated that dioscin notably induces apoptosis in HeLa and SiHa cells through adjusting ROS-mediated DNA damage and the mitochondrial signaling pathway.
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Affiliation(s)
- Xinwei Zhao
- College of Pharmacy, Dalian Medical University, Western 9 Lvshunnan Road, Dalian 116044, China.
| | - Xufeng Tao
- College of Pharmacy, Dalian Medical University, Western 9 Lvshunnan Road, Dalian 116044, China.
| | - Lina Xu
- College of Pharmacy, Dalian Medical University, Western 9 Lvshunnan Road, Dalian 116044, China.
| | - Lianhong Yin
- College of Pharmacy, Dalian Medical University, Western 9 Lvshunnan Road, Dalian 116044, China.
| | - Yan Qi
- College of Pharmacy, Dalian Medical University, Western 9 Lvshunnan Road, Dalian 116044, China.
| | - Youwei Xu
- College of Pharmacy, Dalian Medical University, Western 9 Lvshunnan Road, Dalian 116044, China.
| | - Xu Han
- College of Pharmacy, Dalian Medical University, Western 9 Lvshunnan Road, Dalian 116044, China.
| | - Jinyong Peng
- College of Pharmacy, Dalian Medical University, Western 9 Lvshunnan Road, Dalian 116044, China.
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4
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Liu H, Wang J, Yang Z, Wang K. Serum Proteomic Analysis Based on iTRAQ in Miners Exposed to Soil Containing Rare Earth Elements. Biol Trace Elem Res 2015; 167:200-8. [PMID: 25800652 DOI: 10.1007/s12011-015-0312-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 03/12/2015] [Indexed: 02/02/2023]
Abstract
To explore the toxic effects of rare earth elements (REEs) accumulated in human body, adopting the inductively coupled plasma mass spectrometry (ICP-MS) method, the present study measured REEs and the contents of eight other elements (Ca, Fe, Cu, Na, K, Zn, Mg, and P) in the hair of eight persons exposed to soil containing REEs for a long time as well as in the control group. In addition, proteomic analysis of serum of the two groups was conducted by isobaric tags for relative and absolute quantitation (iTRAQ) technique. Experimental results show that in the hair of the two groups, 15 REEs and eight other elements were detected, in which the content of La, Ce, Pr, Nd, Tb, Ho, Tm, Yb, and Fe in the exposure group is significantly higher than that of the control group, but the content of Ca in the exposure group is significantly lower than that of the control group; analysis yields out 29 differentially expressed proteins, in which 16 proteins are upregulated and 13 proteins are downregulated. Bioinformatics analysis of differentially expressed proteins demonstrates that they participate in various biological processes and five Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways, forming an interaction network. Besides, some differentially expressed proteins may be related to neurovirulence, hepatotoxicity, pathological fibrosis, osteoporosis, and anticoagulation caused by REEs. The present experiment investigated the toxic effects of REEs accumulated in human body at the molecular level, which may lay a foundation for the future research of biological effect, threshold limit values, protection from exposure, and reasonable application of REEs.
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Affiliation(s)
- Heming Liu
- Orthopedic Surgery of the Second Affiliated Hospital of Medical institute of Xi'an Jiaotong University, Xi'an, Shannxi Province, China
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Luchetti F, Canonico B, Cesarini E, Betti M, Galluzzi L, Galli L, Tippins J, Zerbinati C, Papa S, Iuliano L. 7-Ketocholesterol and 5,6-secosterol induce human endothelial cell dysfunction by differential mechanisms. Steroids 2015; 99:204-11. [PMID: 25697053 DOI: 10.1016/j.steroids.2015.02.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 02/05/2015] [Accepted: 02/06/2015] [Indexed: 11/16/2022]
Abstract
7-Ketocholesterol and 5,6-secosterol are cholesterol autoxidation products generated under oxidative stress by two distinct mechanisms. They are present in atherosclerotic plaques and are candidate players in the disease initiation and progression. While 7-ketocholesterol affects at cellular level, in particular apoptosis, are well known and reported on diverse cell lines, 5,6-secosterol is a recently discovered oxysterol with relatively few reports on the potential to affect endothelial cell functions. Endothelial cells have a central role in cardiovascular disease as they provide the barrier between blood and the vessel wall where atherosclerosis starts and progresses. Insults to endothelial cells provoke their dysfunction favoring pro-atherogenic and pro-thrombotic effects. In the present work, we tested 7-ketocholesterol and 5,6-secosterol on endothelial cells - focusing on apoptosis and the associated mitochondrial/lysosome alterations - and on endothelial function using the in vitro model of arterial relaxation of aortic rings. Our data provide evidence that 7-ketocholesterol and 5,6-secosterol are efficient instigators of apoptosis, which for 5,6-secosterol is associated to PKC and p53 up-regulation. In addition 5,6-secosterol is a potent inhibitor of endothelial-dependent arterial relaxation through PKC-dependent mechanisms. This may contribute to pro-atherogenic and pro-thrombotic mechanisms of 5,6-secosterol and highlights the role of cholesterol autoxidation in cardiovascular disease.
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Affiliation(s)
- Francesca Luchetti
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, Italy.
| | - Barbara Canonico
- Department of Earth, Life and Environmental Science, University of Urbino "Carlo Bo", Urbino, Italy
| | - Erica Cesarini
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, Italy
| | - Michele Betti
- Department of Earth, Life and Environmental Science, University of Urbino "Carlo Bo", Urbino, Italy
| | - Luca Galluzzi
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, Italy
| | - Laura Galli
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, Italy
| | - John Tippins
- Division of Cell & Molecular Biology, Biochemistry Building, Imperial College, London, UK
| | - Chiara Zerbinati
- Department of Medico-Surgical Sciences and Biotechnologies Vascular Biology, Atherothrombosis & Mass Spectrometry, Sapienza University of Rome, Latina, Italy
| | - Stefano Papa
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, Italy
| | - Luigi Iuliano
- Department of Medico-Surgical Sciences and Biotechnologies Vascular Biology, Atherothrombosis & Mass Spectrometry, Sapienza University of Rome, Latina, Italy
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Wang X, Li Y, Xu G, Liu M, Xue L, Liu L, Hu S, Zhang Y, Nie Y, Liang S, Wang B, Ding J. Mechanism study of peptide GMBP1 and its receptor GRP78 in modulating gastric cancer MDR by iTRAQ-based proteomic analysis. BMC Cancer 2015; 15:358. [PMID: 25943993 PMCID: PMC4430905 DOI: 10.1186/s12885-015-1361-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 04/23/2015] [Indexed: 12/28/2022] Open
Abstract
Background Multidrug resistance (MDR) is a major obstacle to the treatment of gastric cancer (GC). Using a phage display approach, we previously obtained the peptide GMBP1, which specifically binds to the surface of MDR gastric cancer cells and is subsequently internalized. Furthermore, GMBP1 was shown to have the potential to reverse the MDR phenotype of gastric cancer cells, and GRP78 was identified as the receptor for this peptide. The present study aimed to investigate the mechanism of peptide GMBP1 and its receptor GRP78 in modulating gastric cancer MDR. Methods Fluorescence-activated cell sorting (FACS) and immunofluorescence staining were used to investigate the subcellular location and mechanism of GMBP1 internalization. iTRAQ was used to identify the MDR-associated downstream targets of GMBP1. Differentially expressed proteins were identified in GMBP1-treated compared to untreated SGC7901/ADR and SGC7901/VCR cells. GO and KEGG pathway analyses of the differentially expressed proteins revealed the interconnection of these proteins, the majority of which are involved in MDR. Two differentially expressed proteins were selected and validated by western blotting. Results GMBP1 and its receptor GRP78 were found to be localized in the cytoplasm of GC cells, and GRP78 can mediate the internalization of GMBP1 into MDR cells through the transferrin-related pathway. In total, 3,752 and 3,749 proteins were affected in GMBP1-treated SGC7901/ADR and SGC7901/VCR cells, respectively, involving 38 and 79 KEGG pathways. Two differentially expressed proteins, CTBP2 and EIF4E, were selected and validated by western blotting. Conclusion This study explored the role and downstream mechanism of GMBP1 in GC MDR, providing insight into the role of endoplasmic reticulum stress protein GRP78 in the MDR of cancer cells. Electronic supplementary material The online version of this article (doi:10.1186/s12885-015-1361-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xiaojuan Wang
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, 127 Changle Western Road, Xi'an, 710032, China.
| | - Yani Li
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, 127 Changle Western Road, Xi'an, 710032, China.
| | - Guanghui Xu
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, 127 Changle Western Road, Xi'an, 710032, China.
| | - Muhan Liu
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, 127 Changle Western Road, Xi'an, 710032, China.
| | - Lin Xue
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, 127 Changle Western Road, Xi'an, 710032, China.
| | - Lijuan Liu
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, 127 Changle Western Road, Xi'an, 710032, China.
| | - Sijun Hu
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, 127 Changle Western Road, Xi'an, 710032, China.
| | - Ying Zhang
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, 127 Changle Western Road, Xi'an, 710032, China.
| | - Yongzhan Nie
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, 127 Changle Western Road, Xi'an, 710032, China.
| | - Shuhui Liang
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, 127 Changle Western Road, Xi'an, 710032, China.
| | - Biaoluo Wang
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, 127 Changle Western Road, Xi'an, 710032, China.
| | - Jie Ding
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, 127 Changle Western Road, Xi'an, 710032, China.
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7
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Jaishy B, Zhang Q, Chung HS, Riehle C, Soto J, Jenkins S, Abel P, Cowart LA, Van Eyk JE, Abel ED. Lipid-induced NOX2 activation inhibits autophagic flux by impairing lysosomal enzyme activity. J Lipid Res 2014; 56:546-561. [PMID: 25529920 DOI: 10.1194/jlr.m055152] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Autophagy is a catabolic process involved in maintaining energy and organelle homeostasis. The relationship between obesity and the regulation of autophagy is cell type specific. Despite adverse consequences of obesity on cardiac structure and function, the contribution of altered cardiac autophagy in response to fatty acid overload is incompletely understood. Here, we report the suppression of autophagosome clearance and the activation of NADPH oxidase (Nox)2 in both high fat-fed murine hearts and palmitate-treated H9C2 cardiomyocytes (CMs). Defective autophagosome clearance is secondary to superoxide-dependent impairment of lysosomal acidification and enzyme activity in palmitate-treated CMs. Inhibition of Nox2 prevented superoxide overproduction, restored lysosome acidification and enzyme activity, and reduced autophagosome accumulation in palmitate-treated CMs. Palmitate-induced Nox2 activation was dependent on the activation of classical protein kinase Cs (PKCs), specifically PKCβII. These findings reveal a novel mechanism linking lipotoxicity with a PKCβ-Nox2-mediated impairment in pH-dependent lysosomal enzyme activity that diminishes autophagic turnover in CMs.
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Affiliation(s)
- Bharat Jaishy
- Division of Endocrinology, Metabolism, and Diabetes and Program in Molecular Medicine, University of Utah School of Medicine, Salt Lake City, UT 84112; Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT 84112; Fraternal Order of Eagles Diabetes Research Center and Division of Endocrinology and Metabolism, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA 52242
| | - Quanjiang Zhang
- Division of Endocrinology, Metabolism, and Diabetes and Program in Molecular Medicine, University of Utah School of Medicine, Salt Lake City, UT 84112; Fraternal Order of Eagles Diabetes Research Center and Division of Endocrinology and Metabolism, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA 52242
| | - Heaseung S Chung
- Department of Biological Chemistry, Johns Hopkins University, Baltimore, MD 21224
| | - Christian Riehle
- Division of Endocrinology, Metabolism, and Diabetes and Program in Molecular Medicine, University of Utah School of Medicine, Salt Lake City, UT 84112; Fraternal Order of Eagles Diabetes Research Center and Division of Endocrinology and Metabolism, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA 52242
| | - Jamie Soto
- Division of Endocrinology, Metabolism, and Diabetes and Program in Molecular Medicine, University of Utah School of Medicine, Salt Lake City, UT 84112; Fraternal Order of Eagles Diabetes Research Center and Division of Endocrinology and Metabolism, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA 52242
| | - Stephen Jenkins
- Division of Endocrinology, Metabolism, and Diabetes and Program in Molecular Medicine, University of Utah School of Medicine, Salt Lake City, UT 84112
| | - Patrick Abel
- Division of Endocrinology, Metabolism, and Diabetes and Program in Molecular Medicine, University of Utah School of Medicine, Salt Lake City, UT 84112
| | - L Ashley Cowart
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29403
| | - Jennifer E Van Eyk
- Department of Biological Chemistry, Johns Hopkins University, Baltimore, MD 21224; Department of Medicine, Division of Cardiology, Johns Hopkins University, Baltimore, MD 21224; Bayview Proteomics Center, Johns Hopkins University, Baltimore, MD 21224
| | - E Dale Abel
- Division of Endocrinology, Metabolism, and Diabetes and Program in Molecular Medicine, University of Utah School of Medicine, Salt Lake City, UT 84112; Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT 84112; Fraternal Order of Eagles Diabetes Research Center and Division of Endocrinology and Metabolism, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA 52242.
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Chen H, Xu L, Yin L, Xu Y, Han X, Qi Y, Zhao Y, Liu K, Peng J. iTRAQ-based proteomic analysis of dioscin on human HCT-116 colon cancer cells. Proteomics 2014; 14:51-73. [DOI: 10.1002/pmic.201300101] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 10/24/2013] [Accepted: 10/28/2013] [Indexed: 12/27/2022]
Affiliation(s)
- Hao Chen
- College of Pharmacy; Dalian Medical University; Dalian China
| | - Lina Xu
- College of Pharmacy; Dalian Medical University; Dalian China
| | - Lianhong Yin
- College of Pharmacy; Dalian Medical University; Dalian China
| | - Youwei Xu
- College of Pharmacy; Dalian Medical University; Dalian China
| | - Xu Han
- College of Pharmacy; Dalian Medical University; Dalian China
| | - Yan Qi
- College of Pharmacy; Dalian Medical University; Dalian China
| | - Yanyan Zhao
- College of Pharmacy; Dalian Medical University; Dalian China
| | - Kexin Liu
- College of Pharmacy; Dalian Medical University; Dalian China
| | - Jinyong Peng
- College of Pharmacy; Dalian Medical University; Dalian China
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Mialoundama AS, Jadid N, Brunel J, Di Pascoli T, Heintz D, Erhardt M, Mutterer J, Bergdoll M, Ayoub D, Van Dorsselaer A, Rahier A, Nkeng P, Geoffroy P, Miesch M, Camara B, Bouvier F. Arabidopsis ERG28 tethers the sterol C4-demethylation complex to prevent accumulation of a biosynthetic intermediate that interferes with polar auxin transport. THE PLANT CELL 2013; 25:4879-93. [PMID: 24326590 PMCID: PMC3903993 DOI: 10.1105/tpc.113.115576] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Revised: 10/10/2013] [Accepted: 11/20/2013] [Indexed: 05/22/2023]
Abstract
Sterols are vital for cellular functions and eukaryotic development because of their essential role as membrane constituents. Sterol biosynthetic intermediates (SBIs) represent a potential reservoir of signaling molecules in mammals and fungi, but little is known about their functions in plants. SBIs are derived from the sterol C4-demethylation enzyme complex that is tethered to the membrane by Ergosterol biosynthetic protein28 (ERG28). Here, using nonlethal loss-of-function strategies focused on Arabidopsis thaliana ERG28, we found that the previously undetected SBI 4-carboxy-4-methyl-24-methylenecycloartanol (CMMC) inhibits polar auxin transport (PAT), a key mechanism by which the phytohormone auxin regulates several aspects of plant growth, including development and responses to environmental factors. The induced accumulation of CMMC in Arabidopsis erg28 plants was associated with diagnostic hallmarks of altered PAT, including the differentiation of pin-like inflorescence, loss of apical dominance, leaf fusion, and reduced root growth. PAT inhibition by CMMC occurs in a brassinosteroid-independent manner. The data presented show that ERG28 is required for PAT in plants. Furthermore, it is accumulation of an atypical SBI that may act to negatively regulate PAT in plants. Hence, the sterol pathway offers further prospects for mining new target molecules that could regulate plant development.
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Affiliation(s)
- Alexis Samba Mialoundama
- Institut de Biologie Moléculaire des Plantes, Centre National de la Recherche Scientifique and Université de Strasbourg, 67084 Strasbourg cedex, France
| | - Nurul Jadid
- Institut de Biologie Moléculaire des Plantes, Centre National de la Recherche Scientifique and Université de Strasbourg, 67084 Strasbourg cedex, France
- Department of Biology Botanical and Plant Tissue Culture Laboratory, Sepuluh Nopember Institut of Technology, 60111 East-Java, Indonesia
| | - Julien Brunel
- Institut de Biologie Moléculaire des Plantes, Centre National de la Recherche Scientifique and Université de Strasbourg, 67084 Strasbourg cedex, France
| | - Thomas Di Pascoli
- Institut de Biologie Moléculaire des Plantes, Centre National de la Recherche Scientifique and Université de Strasbourg, 67084 Strasbourg cedex, France
| | - Dimitri Heintz
- Institut de Biologie Moléculaire des Plantes, Centre National de la Recherche Scientifique and Université de Strasbourg, 67084 Strasbourg cedex, France
| | - Mathieu Erhardt
- Institut de Biologie Moléculaire des Plantes, Centre National de la Recherche Scientifique and Université de Strasbourg, 67084 Strasbourg cedex, France
| | - Jérôme Mutterer
- Institut de Biologie Moléculaire des Plantes, Centre National de la Recherche Scientifique and Université de Strasbourg, 67084 Strasbourg cedex, France
| | - Marc Bergdoll
- Institut de Biologie Moléculaire des Plantes, Centre National de la Recherche Scientifique and Université de Strasbourg, 67084 Strasbourg cedex, France
| | - Daniel Ayoub
- Laboratoire de Spectrométrie de Masse Bio-Organique, Département des Sciences Analytiques, Institut Pluridisciplinaire Hubert Curien, 67087 Strasbourg cedex 2, France
| | - Alain Van Dorsselaer
- Laboratoire de Spectrométrie de Masse Bio-Organique, Département des Sciences Analytiques, Institut Pluridisciplinaire Hubert Curien, 67087 Strasbourg cedex 2, France
| | - Alain Rahier
- Institut de Biologie Moléculaire des Plantes, Centre National de la Recherche Scientifique and Université de Strasbourg, 67084 Strasbourg cedex, France
| | - Paul Nkeng
- Laboratoire Interuniversitaire des Sciences de l'Education et de la Communication, 67000 Strasbourg, France
| | - Philippe Geoffroy
- Laboratoire de Chimie Organique Synthétique, Université de Strasbourg-Institut de Chimie, 67008 Strasbourg cedex, France
| | - Michel Miesch
- Laboratoire de Chimie Organique Synthétique, Université de Strasbourg-Institut de Chimie, 67008 Strasbourg cedex, France
| | - Bilal Camara
- Institut de Biologie Moléculaire des Plantes, Centre National de la Recherche Scientifique and Université de Strasbourg, 67084 Strasbourg cedex, France
| | - Florence Bouvier
- Institut de Biologie Moléculaire des Plantes, Centre National de la Recherche Scientifique and Université de Strasbourg, 67084 Strasbourg cedex, France
- Address correspondence to
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10
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SUMO-1 is Associated with a Subset of Lysosomes in Glial Protein Aggregate Diseases. Neurotox Res 2012; 23:1-21. [DOI: 10.1007/s12640-012-9358-z] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 10/19/2012] [Accepted: 10/26/2012] [Indexed: 10/27/2022]
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Sukhanova A, Gorin A, Serebriiskii IG, Gabitova L, Zheng H, Restifo D, Egleston BL, Cunningham D, Bagnyukova T, Liu H, Nikonova A, Adams GP, Zhou Y, Yang DH, Mehra R, Burtness B, Cai KQ, Klein-Szanto A, Kratz LE, Kelley RI, Weiner LM, Herman GE, Golemis EA, Astsaturov I. Targeting C4-demethylating genes in the cholesterol pathway sensitizes cancer cells to EGF receptor inhibitors via increased EGF receptor degradation. Cancer Discov 2012. [PMID: 23125191 DOI: 10.1158/2159-8290.cd-12-0031.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
UNLABELLED Persistent signaling by the oncogenic EGF receptor (EGFR) is a major source of cancer resistance to EGFR targeting. We established that inactivation of 2 sterol biosynthesis pathway genes, SC4MOL (sterol C4-methyl oxidase-like) and its partner, NSDHL (NADP-dependent steroid dehydrogenase-like), sensitized tumor cells to EGFR inhibitors. Bioinformatics modeling of interactions for the sterol pathway genes in eukaryotes allowed us to hypothesize and then extensively validate an unexpected role for SC4MOL and NSDHL in controlling the signaling, vesicular trafficking, and degradation of EGFR and its dimerization partners, ERBB2 and ERBB3. Metabolic block upstream of SC4MOL with ketoconazole or CYP51A1 siRNA rescued cancer cell viability and EGFR degradation. Inactivation of SC4MOL markedly sensitized A431 xenografts to cetuximab, a therapeutic anti-EGFR antibody. Analysis of Nsdhl-deficient Bpa(1H/+) mice confirmed dramatic and selective loss of internalized platelet-derived growth factor receptor in fibroblasts, and reduced activation of EGFR and its effectors in regions of skin lacking NSDHL. SIGNIFICANCE This work identifies a critical role for SC4MOL and NSDHL in the regulation of EGFR signaling and endocytic trafficking and suggests novel strategies to increase the potency of EGFR antagonists in tumors.
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Affiliation(s)
- Anna Sukhanova
- Program in Developmental Therapeutics, Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, USA
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12
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Sukhanova A, Gorin A, Serebriiskii IG, Gabitova L, Zheng H, Restifo D, Egleston BL, Cunningham D, Bagnyukova T, Liu H, Nikonova A, Adams GP, Zhou Y, Yang DH, Mehra R, Burtness B, Cai KQ, Klein-Szanto A, Kratz LE, Kelley RI, Weiner LM, Herman GE, Golemis EA, Astsaturov I. Targeting C4-demethylating genes in the cholesterol pathway sensitizes cancer cells to EGF receptor inhibitors via increased EGF receptor degradation. Cancer Discov 2012; 3:96-111. [PMID: 23125191 DOI: 10.1158/2159-8290.cd-12-0031] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
UNLABELLED Persistent signaling by the oncogenic EGF receptor (EGFR) is a major source of cancer resistance to EGFR targeting. We established that inactivation of 2 sterol biosynthesis pathway genes, SC4MOL (sterol C4-methyl oxidase-like) and its partner, NSDHL (NADP-dependent steroid dehydrogenase-like), sensitized tumor cells to EGFR inhibitors. Bioinformatics modeling of interactions for the sterol pathway genes in eukaryotes allowed us to hypothesize and then extensively validate an unexpected role for SC4MOL and NSDHL in controlling the signaling, vesicular trafficking, and degradation of EGFR and its dimerization partners, ERBB2 and ERBB3. Metabolic block upstream of SC4MOL with ketoconazole or CYP51A1 siRNA rescued cancer cell viability and EGFR degradation. Inactivation of SC4MOL markedly sensitized A431 xenografts to cetuximab, a therapeutic anti-EGFR antibody. Analysis of Nsdhl-deficient Bpa(1H/+) mice confirmed dramatic and selective loss of internalized platelet-derived growth factor receptor in fibroblasts, and reduced activation of EGFR and its effectors in regions of skin lacking NSDHL. SIGNIFICANCE This work identifies a critical role for SC4MOL and NSDHL in the regulation of EGFR signaling and endocytic trafficking and suggests novel strategies to increase the potency of EGFR antagonists in tumors.
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Affiliation(s)
- Anna Sukhanova
- Program in Developmental Therapeutics, Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, USA
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13
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Engelke R, Becker AC, Dengjel J. The degradative inventory of the cell: proteomic insights. Antioxid Redox Signal 2012; 17:803-12. [PMID: 22074050 DOI: 10.1089/ars.2011.4393] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
SIGNIFICANCE Protein degradation has been identified as being deregulated in numerous human diseases. Hence, proteins involved in proteasomal as well as lysosomal degradation are regarded as interesting potential drug targets and are thoroughly investigated in clinical studies. RECENT ADVANCES Technical advances in the field of quantitative mass spectrometry (MS)-based proteomics allow for detailed investigations of protein degradation dynamics and identifications of responsible protein-protein interaction networks enabling a systematic analysis of the degradative inventory of the cell and its underlying molecular mechanisms. CRITICAL ISSUES In the current review we outline recent technical advances and their limitations in MS-based proteomics and discuss their use for the analysis of protein dynamics involved in degradation processes. FUTURE DIRECTIONS In the next years the analysis of crosstalk between different posttranslational modifications (PTMs) will be a major focus of MS-based proteomics studies. Increasing evidence highlights the complexity of PTMs with positive and negative feedbacks being discovered. In this regard, the generation of absolute quantitative proteomic data will be essential for theoretical scientists to construct predictive network models that constitute a valuable tool for fast hypothesis testing and for explaining underlying molecular mechanisms.
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Affiliation(s)
- Rudolf Engelke
- Freiburg Institute for Advanced Studies, School of Life Science-LifeNet, University of Freiburg, Germany
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14
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Castagna A, Polati R, Bossi AM, Girelli D. Monocyte/macrophage proteomics: recent findings and biomedical applications. Expert Rev Proteomics 2012; 9:201-15. [PMID: 22462790 DOI: 10.1586/epr.12.11] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Macrophages, originating from the migration and differentiation of circulating monocytes into virtually all tissues, are extremely flexible and plastic cells that play vital homeostatic roles, but also contribute to the pathophysiology of many human diseases. For these reasons, they are intensively studied by different approaches, recently including proteomics. Macrophage cells can be taken from a range of different sources, including blood monocytes and macrophages from tissues. Macrophages can also be generated by in vitro culture from blood monocytes, and cell lines derived from this lineage can be used. Similarly, many different proteomic techniques can be used, ranging from classic approaches based on 2D gel electrophoresis to more recent high-throughput gel-free techniques essentially based on mass spectrometry. Here, we review the application of such techniques to the study of monocytes/macrophages, and summarize some results potentially relevant to two paradigmatic conditions - atherosclerosis and disorders of iron metabolism.
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Affiliation(s)
- Annalisa Castagna
- Department of Medicine, Unit of Internal Medicine, University of Verona, Policlinico G.B. Rossi, Piazzale L.A. Scuro 10, Verona, Italy
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15
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Wang J, Beauchemin M, Bertrand R. Phospho-Bcl-x(L)(Ser62) plays a key role at DNA damage-induced G(2) checkpoint. Cell Cycle 2012; 11:2159-69. [PMID: 22617334 PMCID: PMC3368867 DOI: 10.4161/cc.20672] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Accumulating evidence suggests that Bcl-xL, an anti-apoptotic member of the Bcl-2 family, also functions in cell cycle progression and cell cycle checkpoints. Analysis of a series of phosphorylation site mutants reveals that cells expressing Bcl-xL(Ser62Ala) mutant are less stable at the G 2 checkpoint and enter mitosis more rapidly than cells expressing wild-type Bcl-xL or Bcl-xL phosphorylation site mutants, including Thr41Ala, Ser43Ala, Thr47Ala, Ser56Ala and Thr115Ala. Analysis of the dynamic phosphorylation and location of phospho-Bcl-xL(Ser62) in unperturbed, synchronized cells and during DNA damage-induced G 2 arrest discloses that a pool of phospho-Bcl-xL(Ser62) accumulates into nucleolar structures in etoposide-exposed cells during G 2 arrest. In a series of in vitro kinase assays, pharmacological inhibitors and specific siRNAs experiments, we found that Polo kinase 1 and MAPK9/JNK2 are major protein kinases involved in Bcl-xL(Ser62) phosphorylation and accumulation into nucleolar structures during the G 2 checkpoint. In nucleoli, phospho-Bcl-xL(Ser62) binds to and co-localizes with Cdk1(cdc2), the key cyclin-dependent kinase required for entry into mitosis. These data indicate that during G 2 checkpoint, phospho-Bcl-xL(Ser62) stabilizes G 2 arrest by timely trapping of Cdk1(cdc2) in nucleolar structures to slow mitotic entry. It also highlights that DNA damage affects the dynamic composition of the nucleolus, which now emerges as a piece of the DNA damage response.
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Affiliation(s)
- Jianfang Wang
- Centre de recherche; Centre hospitalier de l’Université of Montréal (CRCHUM) - Hôpital Notre-Dame and Institut du Cancer de Montréal; Montréal, Québec, Canada
| | - Myriam Beauchemin
- Centre de recherche; Centre hospitalier de l’Université of Montréal (CRCHUM) - Hôpital Notre-Dame and Institut du Cancer de Montréal; Montréal, Québec, Canada
| | - Richard Bertrand
- Centre de recherche; Centre hospitalier de l’Université of Montréal (CRCHUM) - Hôpital Notre-Dame and Institut du Cancer de Montréal; Montréal, Québec, Canada
- Département de médecine; Université de Montréal; Montréal, Québec, Canada
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16
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Horvat S, Mcwhir J, Rozman D. Defects in cholesterol synthesis genes in mouse and in humans: lessons for drug development and safer treatments. Drug Metab Rev 2011; 43:69-90. [DOI: 10.3109/03602532.2010.540580] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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17
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Hussain SK, Broederdorf LJ, Sharma UM, Voth DE. Host Kinase Activity is Required for Coxiella burnetii Parasitophorous Vacuole Formation. Front Microbiol 2010; 1:137. [PMID: 21772829 PMCID: PMC3119423 DOI: 10.3389/fmicb.2010.00137] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Accepted: 12/04/2010] [Indexed: 11/24/2022] Open
Abstract
Coxiella burnetii is the etiologic agent of human Q fever and targets alveolar phagocytic cells in vivo wherein the pathogen generates a phagolysosome-like parasitophorous vacuole (PV) for replication. C. burnetii displays a prolonged growth cycle, making PV maintenance critical for bacterial survival. Previous studies showed that C. burnetii mediates activation of eukaryotic kinases to inhibit cell death, indicating the importance of host signaling during infection. In the current study, we examined the role of eukaryotic kinase signaling in PV establishment. A panel of 113 inhibitors was analyzed for their impact on C. burnetii infection of human THP-1 macrophage-like cells and HeLa cells. Inhibition of 11 kinases or two phosphatases altered PV formation and prevented pathogen growth, with most inhibitor-treated cells harboring organisms in tight-fitting phagosomes, indicating kinase/phosphatase activation is required for PV maturation. Five inhibitors targeted protein kinase C (PKC), suggesting a critical role for this protein during intracellular growth. The PKC-specific substrate MARCKS was phosphorylated at 24 h post-infection and remained phosphorylated through 5 days post-infection, indicating prolonged regulation of the PKC pathway by C. burnetii. Infection also altered the activation status of p38, myosin light chain kinase, and cAMP-dependent protein kinase, suggesting C. burnetii subverts numerous phosphorylation cascades. These results underscore the importance of intracellular host signaling for C. burnetii PV biogenesis.
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Affiliation(s)
- S Kauser Hussain
- Department of Microbiology and Immunology, University of Arkansas for Medical Sciences Little Rock, AR, USA
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18
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Parent N, Scherer M, Liebisch G, Schmitz G, Bertrand R. Protein kinase C-δ isoform mediates lysosome labilization in DNA damage-induced apoptosis. Int J Oncol 2010; 38:313-24. [PMID: 21174057 DOI: 10.3892/ijo.2010.881] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2010] [Accepted: 11/05/2010] [Indexed: 11/05/2022] Open
Abstract
A lysosomal pathway, characterized by the partial rupture or labilization of lysosomal membranes (LLM) and cathepsin release into the cytosol, is evoked during the early events of 20-S-camptothecin lactone (CPT)-induced apoptosis in human cancer cells, including human histiocytic lymphoma U-937 cells. These lysosomal events begin rapidly and simultaneously with mitochondrial permeabilization and caspase activation within 3 h after drug treatment. Recently, in a comparative proteomics analysis performed on highly-enriched lysosomal extracts, we identified proteins whose translocation to lysosomes correlated with LLM induction after CPT treatment, including protein kinase C-δ (PKC-δ). In this study, we show that the PKC-δ translocation to lysosomes is required for LLM, as silencing its expression with RNA interference or suppressing its activity with the inhibitor, rottlerin, prevents CPT-induced LLM. PKC-δ translocation to lysosomes is associated with lysosomal acidic sphingomyelinase (ASM) phosphorylation and activation, which in turn leads to an increase in ceramide (CER) content in lysosomes. The accumulation of endogenous CER in lysosomes is a critical event for CPT-induced LLM as suppressing PKC-δ or ASM activity reduces both the CPT-mediated CER generation in lysosomes and CPT-induced LLM. These findings reveal a novel mechanism by which PKC-δ mediates ASM phosphorylation/activation and CER accumulation in lysosomes in CPT-induced LLM, rapidly activating the lysosomal pathway of apoptosis after CPT treatment.
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Affiliation(s)
- Nicolas Parent
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Hôpital Notre-Dame and Institut du Cancer de Montréal, Montreal, QC H2L 4M1, Canada
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19
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Johansson AC, Appelqvist H, Nilsson C, Kågedal K, Roberg K, Ollinger K. Regulation of apoptosis-associated lysosomal membrane permeabilization. Apoptosis 2010; 15:527-40. [PMID: 20077016 PMCID: PMC2850995 DOI: 10.1007/s10495-009-0452-5] [Citation(s) in RCA: 340] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Lysosomal membrane permeabilization (LMP) occurs in response to a large variety of cell death stimuli causing release of cathepsins from the lysosomal lumen into the cytosol where they participate in apoptosis signaling. In some settings, apoptosis induction is dependent on an early release of cathepsins, while under other circumstances LMP occurs late in the cell death process and contributes to amplification of the death signal. The mechanism underlying LMP is still incompletely understood; however, a growing body of evidence suggests that LMP may be governed by several distinct mechanisms that are likely engaged in a death stimulus- and cell-type-dependent fashion. In this review, factors contributing to permeabilization of the lysosomal membrane including reactive oxygen species, lysosomal membrane lipid composition, proteases, p53, and Bcl-2 family proteins, are described. Potential mechanisms to safeguard lysosomal integrity and confer resistance to lysosome-dependent cell death are also discussed.
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