1
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Sikder K, Phillips E, Zhong Z, Wang N, Saunders J, Mothy D, Kossenkov A, Schneider T, Nichtova Z, Csordas G, Margulies KB, Choi JC. Perinuclear damage from nuclear envelope deterioration elicits stress responses that contribute to LMNA cardiomyopathy. SCIENCE ADVANCES 2024; 10:eadh0798. [PMID: 38718107 PMCID: PMC11078192 DOI: 10.1126/sciadv.adh0798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 04/03/2024] [Indexed: 05/12/2024]
Abstract
Mutations in the LMNA gene encoding lamins A/C cause an array of tissue-selective diseases, with the heart being the most commonly affected organ. Despite progress in understanding the perturbations emanating from LMNA mutations, an integrative understanding of the pathogenesis underlying cardiac dysfunction remains elusive. Using a novel conditional deletion model capable of translatome profiling, we observed that cardiomyocyte-specific Lmna deletion in adult mice led to rapid cardiomyopathy with pathological remodeling. Before cardiac dysfunction, Lmna-deleted cardiomyocytes displayed nuclear abnormalities, Golgi dilation/fragmentation, and CREB3-mediated stress activation. Translatome profiling identified MED25 activation, a transcriptional cofactor that regulates Golgi stress. Autophagy is disrupted in the hearts of these mice, which can be recapitulated by disrupting the Golgi. Systemic administration of modulators of autophagy or ER stress significantly delayed cardiac dysfunction and prolonged survival. These studies support a hypothesis wherein stress responses emanating from the perinuclear space contribute to the LMNA cardiomyopathy development.
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Affiliation(s)
- Kunal Sikder
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Elizabeth Phillips
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Zhijiu Zhong
- Translational Research and Pathology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Nadan Wang
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Jasmine Saunders
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - David Mothy
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
| | - Andrew Kossenkov
- Bioinformatics Facility, The Wistar Institute Cancer Center, Philadelphia, PA, USA
| | - Timothy Schneider
- Mitocare, Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Zuzana Nichtova
- Mitocare, Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Gyorgy Csordas
- Mitocare, Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Kenneth B. Margulies
- Cardiovascular Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jason C. Choi
- Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia PA, USA
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2
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Huang YM, Hsu TY, Liu CY, Hsieh YC, Lai KY, Yang YW, Lo KY. Exploring the multifaceted impact of lanthanides on physiological pathways in human breast cancer cells. Toxicology 2024; 502:153731. [PMID: 38253231 DOI: 10.1016/j.tox.2024.153731] [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: 11/20/2023] [Revised: 01/09/2024] [Accepted: 01/17/2024] [Indexed: 01/24/2024]
Abstract
Lanthanum (La) and cerium (Ce), rare earth elements with physical properties similar to calcium (Ca), are generally considered non-toxic when used appropriately. However, their ions possess anti-tumor capabilities. This investigation explores the potential applications and mechanisms of LaCl3 or CeCl3 treatment in triple-negative breast cancer (TNBC) cell lines. TNBC, characterized by the absence of estrogen receptor (ERα), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER-2) expression, is prone to early metastasis and resistant to hormone therapy. Our results demonstrate that La/Ce treatment reduces cell growth, and when combined with cisplatin, it synergistically inhibits cell growth and the PI3K/AKT pathway. La and Ce induce oxidative stress by disrupting mitochondrial function, leading to protein oxidation. Additionally, they interfere with protein homeostasis and induce nucleolar stress. Furthermore, disturbance in F-actin web formation impairs cell migration. This study delves into the mechanism by which calcium-like elements La and Ce inhibit breast cancer cell growth, shedding light on their interference in mitochondrial function, protein homeostasis, and cytoskeleton assembly.
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Affiliation(s)
- Yi-Ming Huang
- Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan, ROC
| | - Tsu-Yu Hsu
- Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan, ROC
| | - Ching-Yu Liu
- Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan, ROC
| | - Yu-Chen Hsieh
- Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan, ROC
| | - Kuan-Yun Lai
- Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan, ROC
| | - Ya-Wen Yang
- Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan, ROC.
| | - Kai-Yin Lo
- Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan, ROC.
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3
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Pelizzari-Raymundo D, Doultsinos D, Pineau R, Sauzay C, Koutsandreas T, Langlais T, Carlesso A, Gkotsi E, Negroni L, Avril T, Chatziioannou A, Chevet E, Eriksson LA, Guillory X. A novel IRE1 kinase inhibitor for adjuvant glioblastoma treatment. iScience 2023; 26:106687. [PMID: 37216120 PMCID: PMC10192531 DOI: 10.1016/j.isci.2023.106687] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 02/27/2023] [Accepted: 04/13/2023] [Indexed: 05/24/2023] Open
Abstract
Inositol-requiring enzyme 1 (IRE1) is a major mediator of the unfolded protein response (UPR), which is activated upon endoplasmic reticulum (ER) stress. Tumor cells experience ER stress due to adverse microenvironmental cues, a stress overcome by relying on IRE1 signaling as an adaptive mechanism. Herein, we report the discovery of structurally new IRE1 inhibitors identified through the structural exploration of its kinase domain. Characterization in in vitro and in cellular models showed that they inhibit IRE1 signaling and sensitize glioblastoma (GB) cells to the standard chemotherapeutic, temozolomide (TMZ). Finally, we demonstrate that one of these inhibitors, Z4P, permeates the blood-brain barrier (BBB), inhibits GB growth, and prevents relapse in vivo when administered together with TMZ. The hit compound disclosed herein satisfies an unmet need for targeted, non-toxic IRE1 inhibitors and our results support the attractiveness of IRE1 as an adjuvant therapeutic target in GB.
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Affiliation(s)
- Diana Pelizzari-Raymundo
- INSERM U1242, Université de Rennes, Rennes, France
- Centre de Lutte contre le Cancer Eugène Marquis, Rennes, France
| | - Dimitrios Doultsinos
- INSERM U1242, Université de Rennes, Rennes, France
- Centre de Lutte contre le Cancer Eugène Marquis, Rennes, France
| | - Raphael Pineau
- INSERM U1242, Université de Rennes, Rennes, France
- Centre de Lutte contre le Cancer Eugène Marquis, Rennes, France
| | - Chloé Sauzay
- INSERM U1242, Université de Rennes, Rennes, France
- Centre de Lutte contre le Cancer Eugène Marquis, Rennes, France
| | - Thodoris Koutsandreas
- e-NIOS PC, Kallithea-Athens, Greece
- Center of Systems Biology, Biomedical Research Foundation of the Academy of Athens, Athens, Greece
| | | | - Antonio Carlesso
- Department of Chemistry and Molecular Biology, University of Gothenburg, Göteborg, Sweden
| | - Elena Gkotsi
- e-NIOS PC, Kallithea-Athens, Greece
- Center of Systems Biology, Biomedical Research Foundation of the Academy of Athens, Athens, Greece
| | - Luc Negroni
- Proteomics platform, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC)/INSERM U964/CNRS UMR 7104/Université de Strasbourg, Illkirch, France
| | - Tony Avril
- INSERM U1242, Université de Rennes, Rennes, France
- Centre de Lutte contre le Cancer Eugène Marquis, Rennes, France
| | - Aristotelis Chatziioannou
- e-NIOS PC, Kallithea-Athens, Greece
- Center of Systems Biology, Biomedical Research Foundation of the Academy of Athens, Athens, Greece
| | - Eric Chevet
- INSERM U1242, Université de Rennes, Rennes, France
- Centre de Lutte contre le Cancer Eugène Marquis, Rennes, France
| | - Leif A. Eriksson
- Department of Chemistry and Molecular Biology, University of Gothenburg, Göteborg, Sweden
| | - Xavier Guillory
- INSERM U1242, Université de Rennes, Rennes, France
- Centre de Lutte contre le Cancer Eugène Marquis, Rennes, France
- Univ Rennes, CNRS, ISCR – UMR 6226, 35000 Rennes, France
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4
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Wu KX, Yogarajah T, Choy Loe MW, Kaur P, Hua Lee RC, Mok CK, Wong YH, Phuektes P, Yeo LS, Chow VT, Tan YW, Hann Chu JJ. The host-targeting compound peruvoside has a broad-spectrum antiviral activity against positive-sense RNA viruses. Acta Pharm Sin B 2023; 13:2039-2055. [DOI: 10.1016/j.apsb.2023.03.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 02/22/2023] [Accepted: 03/02/2023] [Indexed: 03/19/2023] Open
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5
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Arif W, Mathur B, Saikali MF, Chembazhi UV, Toohill K, Song YJ, Hao Q, Karimi S, Blue SM, Yee BA, Van Nostrand EL, Bangru S, Guzman G, Yeo GW, Prasanth KV, Anakk S, Cummins CL, Kalsotra A. Splicing factor SRSF1 deficiency in the liver triggers NASH-like pathology and cell death. Nat Commun 2023; 14:551. [PMID: 36759613 PMCID: PMC9911759 DOI: 10.1038/s41467-023-35932-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 01/09/2023] [Indexed: 02/11/2023] Open
Abstract
Regulation of RNA processing contributes profoundly to tissue development and physiology. Here, we report that serine-arginine-rich splicing factor 1 (SRSF1) is essential for hepatocyte function and survival. Although SRSF1 is mainly known for its many roles in mRNA metabolism, it is also crucial for maintaining genome stability. We show that acute liver damage in the setting of targeted SRSF1 deletion in mice is associated with the excessive formation of deleterious RNA-DNA hybrids (R-loops), which induce DNA damage. Combining hepatocyte-specific transcriptome, proteome, and RNA binding analyses, we demonstrate that widespread genotoxic stress following SRSF1 depletion results in global inhibition of mRNA transcription and protein synthesis, leading to impaired metabolism and trafficking of lipids. Lipid accumulation in SRSF1-deficient hepatocytes is followed by necroptotic cell death, inflammation, and fibrosis, resulting in NASH-like liver pathology. Importantly, SRSF1-depleted human liver cancer cells recapitulate this pathogenesis, illustrating a conserved and fundamental role for SRSF1 in preserving genome integrity and tissue homeostasis. Thus, our study uncovers how the accumulation of detrimental R-loops impedes hepatocellular gene expression, triggering metabolic derangements and liver damage.
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Affiliation(s)
- Waqar Arif
- Department of Biochemistry, University of Illinois Urbana-Champaign, Urbana, IL, USA
- College of Medicine, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Bhoomika Mathur
- Department of Molecular and Integrative Physiology, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Michael F Saikali
- Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON, Canada
| | - Ullas V Chembazhi
- Department of Biochemistry, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Katelyn Toohill
- Department of Biochemistry, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - You Jin Song
- Department of Cell and Developmental Biology, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Qinyu Hao
- Department of Cell and Developmental Biology, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Saman Karimi
- Department of Pathology, College of Medicine, Cancer Center, University of Illinois Hospital and Health Science Chicago, Chicago, IL, USA
| | - Steven M Blue
- Department of Cellular and Molecular Medicine, University of California at San Diego, La Jolla, CA, USA
- Institute for Genomic Medicine, University of California at San Diego, La Jolla, CA, USA
| | - Brian A Yee
- Department of Cellular and Molecular Medicine, University of California at San Diego, La Jolla, CA, USA
- Institute for Genomic Medicine, University of California at San Diego, La Jolla, CA, USA
| | - Eric L Van Nostrand
- Department of Cellular and Molecular Medicine, University of California at San Diego, La Jolla, CA, USA
- Institute for Genomic Medicine, University of California at San Diego, La Jolla, CA, USA
- Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Sushant Bangru
- Department of Biochemistry, University of Illinois Urbana-Champaign, Urbana, IL, USA
- Cancer Center @ Illinois, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Grace Guzman
- Department of Pathology, College of Medicine, Cancer Center, University of Illinois Hospital and Health Science Chicago, Chicago, IL, USA
| | - Gene W Yeo
- Department of Cellular and Molecular Medicine, University of California at San Diego, La Jolla, CA, USA
- Institute for Genomic Medicine, University of California at San Diego, La Jolla, CA, USA
| | - Kannanganattu V Prasanth
- Department of Cell and Developmental Biology, University of Illinois Urbana-Champaign, Urbana, IL, USA
- Cancer Center @ Illinois, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Sayeepriyadarshini Anakk
- Department of Molecular and Integrative Physiology, University of Illinois Urbana-Champaign, Urbana, IL, USA
- Cancer Center @ Illinois, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Carolyn L Cummins
- Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON, Canada
| | - Auinash Kalsotra
- Department of Biochemistry, University of Illinois Urbana-Champaign, Urbana, IL, USA.
- Cancer Center @ Illinois, University of Illinois Urbana-Champaign, Urbana, IL, USA.
- Carl R. Woese Institute of Genomic Biology, University of Illinois Urbana-Champaign, Urbana, IL, USA.
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6
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Sposito S, Secondo A, Romanelli AM, Montefusco A, Nanayakkara M, Auricchio S, Barone MV, Caputo I, Paolella G. Peculiar Ca 2+ Homeostasis, ER Stress, Autophagy, and TG2 Modulation in Celiac Disease Patient-Derived Cells. Int J Mol Sci 2023; 24:ijms24021495. [PMID: 36675008 PMCID: PMC9866799 DOI: 10.3390/ijms24021495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 01/02/2023] [Accepted: 01/05/2023] [Indexed: 01/15/2023] Open
Abstract
Celiac disease (CD) is an inflammatory intestinal disease caused by the ingestion of gluten-containing cereals by genetically predisposed individuals. Constitutive differences between cells from CD patients and control subjects, including levels of protein phosphorylation, alterations of vesicular trafficking, and regulation of type 2 transglutaminase (TG2), have been reported. In the present work, we investigated how skin-derived fibroblasts from CD and control subjects responded to thapsigargin, an endoplasmic reticulum ER stress inducer, in an attempt to contribute to the comprehension of molecular features of the CD cellular phenotype. We analyzed Ca2+ levels by single-cell video-imaging and TG2 activity by a microplate assay. Western blots and PCR analyses were employed to monitor TG2 levels and markers of ER stress and autophagy. We found that the cytosolic and ER Ca2+ level of CD cells was lower than in control cells. Treatments with thapsigargin differently activated TG2 in control and CD cells, as well as caused slightly different responses regarding the activation of ER stress and the expression of autophagic markers. On the whole, our findings identified further molecular features of the celiac cellular phenotype and highlighted that CD cells appeared less capable of adapting to a stress condition and responding in a physiological way.
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Affiliation(s)
- Silvia Sposito
- Department of Chemistry and Biology, University of Salerno, 84084 Fisciano, Italy
| | - Agnese Secondo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, University Federico II, 80138 Naples, Italy
| | | | - Antonio Montefusco
- Department of Chemistry and Biology, University of Salerno, 84084 Fisciano, Italy
| | - Merlin Nanayakkara
- Department of Translational Medical Science, University Federico II, 80138 Naples, Italy
| | - Salvatore Auricchio
- European Laboratory for the Investigation of Food-Induced Diseases (ELFID), University Federico II, 80138 Naples, Italy
| | - Maria Vittoria Barone
- Department of Translational Medical Science, University Federico II, 80138 Naples, Italy
- European Laboratory for the Investigation of Food-Induced Diseases (ELFID), University Federico II, 80138 Naples, Italy
| | - Ivana Caputo
- Department of Chemistry and Biology, University of Salerno, 84084 Fisciano, Italy
- European Laboratory for the Investigation of Food-Induced Diseases (ELFID), University Federico II, 80138 Naples, Italy
| | - Gaetana Paolella
- Department of Chemistry and Biology, University of Salerno, 84084 Fisciano, Italy
- Correspondence:
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7
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Yuan N, Song Q, Jin Y, Zhang Z, Wu Z, Sheng X, Qi X, Xing K, Xiao L, Wang X. Replication of standard bovine viral diarrhea strain OregonC24Va induces endoplasmic reticulum stress-mediated apoptosis of bovine trophoblast cells. Cell Stress Chaperones 2023; 28:49-60. [PMID: 36441379 PMCID: PMC9877273 DOI: 10.1007/s12192-022-01300-1] [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: 05/06/2022] [Revised: 08/13/2022] [Accepted: 09/14/2022] [Indexed: 11/29/2022] Open
Abstract
Bovine viral diarrhea (BVD) is a worldwide infectious disease caused by bovine viral diarrhea virus (BVDV) infection, which invades the placenta, causes abortion, produces immune tolerance and continuously infects calves, and causes huge economic losses to the cattle industry. The endoplasmic reticulum (ER) is an important organelle in cells, which is prone to ER stress after being stimulated by pathogens, thus activating the ER stress-related apoptosis. Studies have confirmed that BVDV can utilize the ER of its host to complete its own proliferation and stimulate ER stress to a certain extent. However, the role of ER stress in BVDV infecting bovine placental trophoblast cells (BTCs) and inducing apoptosis is still unclear. We are using the cytopathic strain of BVDV (OregonC24Va), which can cause apoptosis of BTCs, as a model system to determine how ER stress induced by BVDV affects placental toxicity. We show that OregonC24Va can infect BTCs and proliferate in it. With the proliferation of BVDV in BTCs, ER stress-related apoptosis is triggered. The ER stress inhibitor 4-PBA was used to inhibit the ER stress of BTCs, which not only inhibited the proliferation of BVDV, but also reduced the apoptosis of BTCs. The ER stress activator Tg can activate ER stress-related apoptosis, but the proliferation of BVDV does not change in BTCs. Therefore, BVDV utilizes the UPR of activated ER stress to promote the proliferation of BVDV in the early stage of infection, and activates the ER stress-related apoptosis of BTCs in the later stage with the virus proliferation to promote the cell apoptosis and further spread of the virus. Our research provides a new theoretical basis for exploring the placental infection and vertical transmission of BVDV.
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Affiliation(s)
- Naihan Yuan
- Animal Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China
| | - Quanjiang Song
- Key Laboratory of Applied Technology On Green-Eco-Healthy Animal Husbandry of Zhejiang Province, Zhejiang Provincial Engineering Research Center for Animal Health Diagnostics & Advanced Technology, Zhejiang International Science and Technology Cooperation Base for Veterinary Medicine and Health Management, China-Australia Joint Laboratory for Animal Health Big Data Analytics, College of Animal Science and Technology & College of Veterinary Medicine of Zhejiang, A&F University, Lin'an District, 666 Wusu StreetZhejiang Province, Hangzhou, 311300, China
| | - Yan Jin
- Animal Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China
| | - Zhenhao Zhang
- Animal Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China
| | - Zheng Wu
- Animal Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China
| | - Xihui Sheng
- Animal Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China
| | - Xiaolong Qi
- Animal Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China
| | - Kai Xing
- Animal Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China
| | - Longfei Xiao
- Animal Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China.
| | - Xiangguo Wang
- Animal Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China.
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8
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Halilovic M, Marx-Blümel L, Marx C, Buder K, Beck JF, Sonnemann J. Assessment of HDAC Inhibitor-Induced Endoplasmic Reticulum (ER) Stress. Methods Mol Biol 2023; 2589:253-268. [PMID: 36255630 DOI: 10.1007/978-1-0716-2788-4_17] [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] [Indexed: 06/16/2023]
Abstract
The endoplasmic reticulum (ER) is a multifunctional cell organelle which is important for the folding and processing of proteins. Different endogenous and exogenous factors can disturb the ER homeostasis, causing ER stress and activating the unfolded protein response (UPR) to remove misfolded proteins and aggregates. ER stress and the UPR are associated with several human diseases, such as diabetes, Alzheimer's or Parkinson's disease, and cancer. Histone deacetylase inhibitors (HDACi) are used to treat cancer and were shown to induce ER stress/to modulate the UPR, although the exact mechanism is not fully understood and needs further research. Several approaches to monitoring ER stress exist. Here we describe methods including qPCR, Western blot, transmission electron microscopy, and fluorescence microscopy to analyze changes in mRNA and protein expression levels as well as defects in ER structures after HDAC inhibitor-induced ER stress.
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Affiliation(s)
- Melisa Halilovic
- Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Jena, Germany
| | - Lisa Marx-Blümel
- Department of Pediatric Hematology and Oncology, Children's Clinic, Jena University Hospital, Jena, Germany
- Research Center Lobeda, Jena University Hospital, Jena, Germany
| | - Christian Marx
- Center for Pandemic Vaccines and Therapeutics (ZEPAI), Paul Ehrlich Institute (PEI), Langen, Germany
| | - Katrin Buder
- Leibniz Institute on Aging - Fritz Lipmann Institute (FLI), Jena, Germany
| | - James F Beck
- Department of Pediatric Hematology and Oncology, Children's Clinic, Jena University Hospital, Jena, Germany
| | - Jürgen Sonnemann
- Department of Pediatric Hematology and Oncology, Children's Clinic, Jena University Hospital, Jena, Germany.
- Research Center Lobeda, Jena University Hospital, Jena, Germany.
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9
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Askari S, Javadpour P, Rashidi FS, Dargahi L, Kashfi K, Ghasemi R. Behavioral and Molecular Effects of Thapsigargin-Induced Brain ER- Stress: Encompassing Inflammation, MAPK, and Insulin Signaling Pathway. Life (Basel) 2022; 12:life12091374. [PMID: 36143409 PMCID: PMC9500646 DOI: 10.3390/life12091374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 08/24/2022] [Accepted: 08/30/2022] [Indexed: 11/16/2022] Open
Abstract
Accumulation of misfolded proteins, known as endoplasmic reticulum (ER) stress, is known to participate in Alzheimer’s disease (AD). AD is also correlated with impaired central insulin signaling. However, few studies have probed the relationship between memory, central ER stress, inflammation, hippocampal mitogen-activated protein kinase (MAPK) activity and insulin resistance. The present study aimed to investigate the causative role and underlying mechanisms of brain ER stress in memory impairment and develop a reliable animal model for ER-mediated memory loss. Thapsigargin (TG), a known ER stress activator, was centrally administered. The cognitive function of animals was evaluated by the Morris Water Maze (MWM). To verify the induction of central ER stress, we investigated the mRNA expression of UPR markers in the hippocampus. In addition, the activation of ER stress markers, including Bip, CHOP, and some related apoptosis and pro-inflammatory proteins, such as caspase-3, Bax, Bcl-2, TNF-α, MAPK, and insulin signaling markers, were assessed by Western-blots. The results demonstrated that TG impairs spatial cognition and hippocampal insulin signaling. Meanwhile, molecular results showed a concurrent increment of hippocampal UPR markers, apoptosis, P38 activity, and TNF-α. This study introduced TG-induced ER stress as a pharmacological model for memory impairment in rats and revealed some underlying mechanisms.
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Affiliation(s)
- Sahar Askari
- Department of Physiology, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran 11151-19857, Iran
| | - Pegah Javadpour
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran 11151-19857, Iran
| | - Fatemeh Sadat Rashidi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran 11151-19857, Iran
| | - Leila Dargahi
- Neurobiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran 11151-19857, Iran
| | - Khosrow Kashfi
- Department of Molecular, Cellular & Biomedical Sciences, City University of New York School of Medicine, New York, NY 10031, USA
| | - Rasoul Ghasemi
- Department of Physiology, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran 11151-19857, Iran
- Neurophysiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran 11151-19857, Iran
- Correspondence: ; Tel.: +98-21-22439971
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10
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Madison J, Wilhelm K, Meehan DT, Delimont D, Samuelson G, Cosgrove D. Glomerular basement membrane deposition of collagen α1(III) in Alport glomeruli by mesangial filopodia injures podocytes via aberrant signaling through DDR1 and integrin α2β1. J Pathol 2022; 258:26-37. [PMID: 35607980 PMCID: PMC9378723 DOI: 10.1002/path.5969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 04/29/2022] [Accepted: 05/20/2022] [Indexed: 11/20/2022]
Abstract
In Alport mice, activation of the endothelin A receptor (ETA R) in mesangial cells results in sub-endothelial invasion of glomerular capillaries by mesangial filopodia. Filopodia deposit mesangial matrix in the glomerular basement membrane (GBM), including laminin 211 which activates NF-κB, resulting in induction of inflammatory cytokines. Herein we show that collagen α1(III) is also deposited in the GBM. Collagen α1(III) localized to the mesangium in wild-type mice and was found in both the mesangium and the GBM in Alport mice. We show that collagen α1(III) activates discoidin domain receptor family, member 1 (DDR1) receptors both in vitro and in vivo. To elucidate whether collagen α1(III) might cause podocyte injury, cultured murine Alport podocytes were overlaid with recombinant collagen α1(III), or not, for 24 h and RNA was analyzed by RNA sequencing (RNA-seq). These same cells were subjected to siRNA knockdown for integrin α2 or DDR1 and the RNA was analyzed by RNA-seq. Results were validated in vivo using RNA-seq from RNA isolated from wild-type and Alport mouse glomeruli. Numerous genes associated with podocyte injury were up- or down-regulated in both Alport glomeruli and cultured podocytes treated with collagen α1(III), 18 of which have been associated previously with podocyte injury or glomerulonephritis. The data indicate α2β1 integrin/DDR1 co-receptor signaling as the dominant regulatory mechanism. This may explain earlier studies where deletion of either DDR1 or α2β1 integrin in Alport mice ameliorates renal pathology. © 2022 Boys Town National Research Hospital. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of The Pathological Society of Great Britain and Ireland.
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11
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Chen YM, Burrough E. The Effects of Swine Coronaviruses on ER Stress, Autophagy, Apoptosis, and Alterations in Cell Morphology. Pathogens 2022; 11:pathogens11080940. [PMID: 36015060 PMCID: PMC9416022 DOI: 10.3390/pathogens11080940] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/14/2022] [Accepted: 08/15/2022] [Indexed: 11/17/2022] Open
Abstract
Swine coronaviruses include the following six members, namely porcine epidemic diarrhea virus (PEDV), transmissible gastroenteritis virus (TGEV), porcine delta coronavirus (PDCoV), swine acute diarrhea syndrome coronavirus (SADS-CoV), porcine hemagglutinating encephalomyelitis virus (PHEV), and porcine respiratory coronavirus (PRCV). Clinically, PEDV, TGEV, PDCoV, and SADS-CoV cause enteritis, whereas PHEV induces encephalomyelitis, and PRCV causes respiratory disease. Years of studies reveal that swine coronaviruses replicate in the cellular cytoplasm exerting a wide variety of effects on cells. Some of these effects are particularly pertinent to cell pathology, including endoplasmic reticulum (ER) stress, unfolded protein response (UPR), autophagy, and apoptosis. In addition, swine coronaviruses are able to induce cellular changes, such as cytoskeletal rearrangement, alterations of junctional complexes, and epithelial-mesenchymal transition (EMT), that render enterocytes unable to absorb nutrients normally, resulting in the loss of water, ions, and protein into the intestinal lumen. This review aims to describe the cellular changes in swine coronavirus-infected cells and to aid in understanding the pathogenesis of swine coronavirus infections. This review also explores how the virus exerted subcellular and molecular changes culminating in the clinical and pathological findings observed in the field.
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Affiliation(s)
- Ya-Mei Chen
- College of Veterinary Medicine, National Pingtung University of Science and Technology, Neipu, Pingtung County 912301, Taiwan
- Correspondence:
| | - Eric Burrough
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA
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12
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Kyeong M, Lee JS. Endogenous BiP reporter system for simultaneous identification of ER stress and antibody production in Chinese hamster ovary cells. Metab Eng 2022; 72:35-45. [PMID: 35182754 DOI: 10.1016/j.ymben.2022.02.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 01/11/2022] [Accepted: 02/07/2022] [Indexed: 12/28/2022]
Abstract
As the biopharmaceutical industry expands, improving the production of therapeutic proteins using Chinese hamster ovary (CHO) cells is important. However, excessive and complicated protein production causes protein misfolding and triggers endoplasmic reticulum (ER) stress. When ER stress occurs, cells mediate the unfolded protein response (UPR) pathway to restore protein homeostasis and folding capacity of the ER. However, when the cells fail to control prolonged ER stress, UPR induces apoptosis. Therefore, monitoring the degree of UPR is required to achieve high productivity and the desired quality. In this study, we developed a fluorescence-based UPR monitoring system for CHO cells. We integrated mGFP into endogenous HSPA5 encoding BiP, a major ER chaperone, and the primary ER stress activation sensor, using CRISPR/Cas9-mediated targeted integration. The mGFP expression level changed according to the ER stress induced by chemical treatment and batch culture in the engineered cell line. Using this monitoring system, we demonstrated that host cells and recombinant CHO cell lines with different mean fluorescence intensities (MFI; basal expression levels of BiP) possess a distinct capacity for stress culture conditions induced by recombinant protein production. Antibody-producing recombinant CHO cell lines were generated using site-specific integration based on host cells equipped with the BiP reporter system. Targeted integrants showed a strong correlation between productivity and MFI, reflecting the potential of this monitoring system as a screening readout for high producers. Taken together, these data demonstrate the utility of the endogenous BiP reporter system for the detection of real-time dynamic changes in endogenous UPR and its potential for applications in recombinant protein production during CHO cell line development.
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Affiliation(s)
- Minji Kyeong
- Department of Molecular Science and Technology, Ajou University, Suwon, 16499, Republic of Korea
| | - Jae Seong Lee
- Department of Molecular Science and Technology, Ajou University, Suwon, 16499, Republic of Korea.
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13
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Lei Y, Huang Y, Wen X, Yin Z, Zhang Z, Klionsky DJ. How Cells Deal with the Fluctuating Environment: Autophagy Regulation under Stress in Yeast and Mammalian Systems. Antioxidants (Basel) 2022; 11:antiox11020304. [PMID: 35204187 PMCID: PMC8868404 DOI: 10.3390/antiox11020304] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 01/28/2022] [Accepted: 01/31/2022] [Indexed: 12/04/2022] Open
Abstract
Eukaryotic cells frequently experience fluctuations of the external and internal environments, such as changes in nutrient, energy and oxygen sources, and protein folding status, which, after reaching a particular threshold, become a type of stress. Cells develop several ways to deal with these various types of stress to maintain homeostasis and survival. Among the cellular survival mechanisms, autophagy is one of the most critical ways to mediate metabolic adaptation and clearance of damaged organelles. Autophagy is maintained at a basal level under normal growing conditions and gets stimulated by stress through different but connected mechanisms. In this review, we summarize the advances in understanding the autophagy regulation mechanisms under multiple types of stress including nutrient, energy, oxidative, and ER stress in both yeast and mammalian systems.
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Affiliation(s)
- Yuchen Lei
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA; (Y.L.); (Y.H.); (X.W.); (Z.Y.); (Z.Z.)
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Yuxiang Huang
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA; (Y.L.); (Y.H.); (X.W.); (Z.Y.); (Z.Z.)
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Xin Wen
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA; (Y.L.); (Y.H.); (X.W.); (Z.Y.); (Z.Z.)
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Zhangyuan Yin
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA; (Y.L.); (Y.H.); (X.W.); (Z.Y.); (Z.Z.)
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Zhihai Zhang
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA; (Y.L.); (Y.H.); (X.W.); (Z.Y.); (Z.Z.)
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Daniel J. Klionsky
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA; (Y.L.); (Y.H.); (X.W.); (Z.Y.); (Z.Z.)
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
- Correspondence:
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14
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Tóth ME, Sárközy M, Szűcs G, Dukay B, Hajdu P, Zvara Á, Puskás LG, Szebeni GJ, Ruppert Z, Csonka C, Kovács F, Kriston A, Horváth P, Kővári B, Cserni G, Csont T, Sántha M. Exercise training worsens cardiac performance in males but does not change ejection fraction and improves hypertrophy in females in a mouse model of metabolic syndrome. Biol Sex Differ 2022; 13:5. [PMID: 35101146 PMCID: PMC8805345 DOI: 10.1186/s13293-022-00414-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 01/05/2022] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Metabolic syndrome (MetS) refers to a cluster of co-existing cardio-metabolic risk factors, including visceral obesity, dyslipidemia, hyperglycemia with insulin resistance, and hypertension. As there is a close link between MetS and cardiovascular diseases, we aimed to investigate the sex-based differences in MetS-associated heart failure (HF) and cardiovascular response to regular exercise training (ET). METHODS High-fat diet-fed male and female APOB-100 transgenic (HFD/APOB-100, 3 months) mice were used as MetS models, and age- and sex-matched C57BL/6 wild-type mice on standard diet served as healthy controls (SD/WT). Both the SD/WT and HFD/APOB-100 mice were divided into sedentary and ET groups, the latter running on a treadmill (0.9 km/h) for 45 min 5 times per week for 7 months. At month 9, transthoracic echocardiography was performed to monitor cardiac function and morphology. At the termination of the experiment at month 10, blood was collected for serum low-density lipoprotein (LDL)- and high-density lipoprotein (HDL)-cholesterol measurements and homeostatic assessment model for insulin resistance (HOMA-IR) calculation. Cardiomyocyte hypertrophy and fibrosis were assessed by histology. Left ventricular expressions of selected genes associated with metabolism, inflammation, and stress response were investigated by qPCR. RESULTS Both HFD/APOB-100 males and females developed obesity and hypercholesterolemia; however, only males showed insulin resistance. ET did not change these metabolic parameters. HFD/APOB-100 males showed echocardiographic signs of mild HF with dilated ventricles and thinner walls, whereas females presented the beginning of left ventricular hypertrophy. In response to ET, SD/WT males developed increased left ventricular volumes, whereas females responded with physiologic hypertrophy. Exercise-trained HFD/APOB-100 males presented worsening HF with reduced ejection fraction; however, ET did not change the ejection fraction and reversed the echocardiographic signs of left ventricular hypertrophy in HFD/APOB-100 females. The left ventricular expression of the leptin receptor was higher in females than males in the SD/WT groups. Left ventricular expression levels of stress response-related genes were higher in the exercise-trained HFD/APOB-100 males and exercise-trained SD/WT females than exercise-trained SD/WT males. CONCLUSIONS HFD/APOB-100 mice showed sex-specific cardiovascular responses to MetS and ET; however, left ventricular gene expressions were similar between the groups except for leptin receptor and several stress response-related genes.
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Affiliation(s)
- Melinda E. Tóth
- grid.481814.00000 0004 0479 9817Laboratory of Animal Genetics and Molecular Neurobiology, Institute of Biochemistry, Biological Research Centre, Eötvös Loránd Research Network, Temesvári krt. 62, Szeged, 6726 Hungary
| | - Márta Sárközy
- MEDICS Research Group, Department of Biochemistry, University of Szeged Albert Szent-Györgyi Medical School, Dóm tér 9, Szeged, 6720, Hungary. .,Interdisciplinary Center of Excellence, University of Szeged, Dugonics tér 13, Szeged, 6720, Hungary.
| | - Gergő Szűcs
- grid.9008.10000 0001 1016 9625MEDICS Research Group, Department of Biochemistry, University of Szeged Albert Szent-Györgyi Medical School, Dóm tér 9, Szeged, 6720 Hungary ,grid.9008.10000 0001 1016 9625Interdisciplinary Center of Excellence, University of Szeged, Dugonics tér 13, Szeged, 6720 Hungary
| | - Brigitta Dukay
- grid.481814.00000 0004 0479 9817Laboratory of Animal Genetics and Molecular Neurobiology, Institute of Biochemistry, Biological Research Centre, Eötvös Loránd Research Network, Temesvári krt. 62, Szeged, 6726 Hungary
| | - Petra Hajdu
- grid.481814.00000 0004 0479 9817Laboratory of Animal Genetics and Molecular Neurobiology, Institute of Biochemistry, Biological Research Centre, Eötvös Loránd Research Network, Temesvári krt. 62, Szeged, 6726 Hungary
| | - Ágnes Zvara
- grid.418331.c0000 0001 2195 9606Laboratory of Functional Genomics, Biological Research Centre, Eötvös Loránd Research Network, Temesvári krt. 62, Szeged, 6726 Hungary
| | - László G. Puskás
- grid.418331.c0000 0001 2195 9606Laboratory of Functional Genomics, Biological Research Centre, Eötvös Loránd Research Network, Temesvári krt. 62, Szeged, 6726 Hungary
| | - Gábor J. Szebeni
- grid.418331.c0000 0001 2195 9606Laboratory of Functional Genomics, Biological Research Centre, Eötvös Loránd Research Network, Temesvári krt. 62, Szeged, 6726 Hungary
| | - Zsófia Ruppert
- grid.481814.00000 0004 0479 9817Laboratory of Animal Genetics and Molecular Neurobiology, Institute of Biochemistry, Biological Research Centre, Eötvös Loránd Research Network, Temesvári krt. 62, Szeged, 6726 Hungary ,grid.9008.10000 0001 1016 9625Doctoral School in Biology, University of Szeged, Szeged, Hungary
| | - Csaba Csonka
- grid.9008.10000 0001 1016 9625MEDICS Research Group, Department of Biochemistry, University of Szeged Albert Szent-Györgyi Medical School, Dóm tér 9, Szeged, 6720 Hungary ,grid.9008.10000 0001 1016 9625Interdisciplinary Center of Excellence, University of Szeged, Dugonics tér 13, Szeged, 6720 Hungary
| | - Ferenc Kovács
- grid.481814.00000 0004 0479 9817Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Eötvös Loránd Research Network, Temesvári krt. 62, Szeged, 6726 Hungary ,Single-Cell Technologies Ltd, Temesvári krt. 62, Szeged, 6726 Hungary
| | - András Kriston
- grid.481814.00000 0004 0479 9817Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Eötvös Loránd Research Network, Temesvári krt. 62, Szeged, 6726 Hungary ,Single-Cell Technologies Ltd, Temesvári krt. 62, Szeged, 6726 Hungary
| | - Péter Horváth
- grid.481814.00000 0004 0479 9817Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Eötvös Loránd Research Network, Temesvári krt. 62, Szeged, 6726 Hungary ,Single-Cell Technologies Ltd, Temesvári krt. 62, Szeged, 6726 Hungary ,grid.7737.40000 0004 0410 2071Institute for Molecular Medicine Finland (FIMM), University of Helsinki, 00014 Helsinki, Finland
| | - Bence Kővári
- grid.9008.10000 0001 1016 9625Department of Pathology, Albert Szent-Györgyi Medical School, University of Szeged, Állomás utca 1, Szeged, 6720 Hungary
| | - Gábor Cserni
- grid.9008.10000 0001 1016 9625Department of Pathology, Albert Szent-Györgyi Medical School, University of Szeged, Állomás utca 1, Szeged, 6720 Hungary
| | - Tamás Csont
- grid.9008.10000 0001 1016 9625MEDICS Research Group, Department of Biochemistry, University of Szeged Albert Szent-Györgyi Medical School, Dóm tér 9, Szeged, 6720 Hungary ,grid.9008.10000 0001 1016 9625Interdisciplinary Center of Excellence, University of Szeged, Dugonics tér 13, Szeged, 6720 Hungary
| | - Miklós Sántha
- grid.481814.00000 0004 0479 9817Laboratory of Animal Genetics and Molecular Neurobiology, Institute of Biochemistry, Biological Research Centre, Eötvös Loránd Research Network, Temesvári krt. 62, Szeged, 6726 Hungary
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15
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Benzaldehyde Attenuates the Fifth Stage Larval Excretory–Secretory Product of Angiostrongylus cantonensis-Induced Injury in Mouse Astrocytes via Regulation of Endoplasmic Reticulum Stress and Oxidative Stress. Biomolecules 2022; 12:biom12020177. [PMID: 35204678 PMCID: PMC8961544 DOI: 10.3390/biom12020177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/24/2021] [Accepted: 01/20/2022] [Indexed: 02/07/2023] Open
Abstract
Excretory–secretory products (ESPs) are the main research targets for investigating the hosts and helminths interaction. Parasitic worms can migrate to parasitic sites and avoid the host immune response by secreting this product. Angiostrongylus cantonensis is an important food-borne zoonotic parasite that causes severe neuropathological damage and symptoms, including eosinophilic meningitis or meningoencephalitis in humans. Benzaldehydes are organic compounds composed of a benzene ring and formyl substituents. This compound has anti-inflammatory and antioxidation properties. Previous studies showed that 3-hydroxybenzaldehyde (3-HBA) and 4-hydroxybenzaldehyde (4-HBA) can reduce apoptosis in A. cantonensis ESP-treated astrocytes. These results on the protective effect underlying benzaldehyde have primarily focused on cell survival. The study was designed to investigate the molecular mechanisms of endoplasmic reticulum stress (ER stress) and oxidative stress in astrocytes in A. cantonensis ESP-treated astrocytes and to evaluate the therapeutic consequent of 3-HBA and 4-HBA. First, we initially established the RNA-seq dataset in each group, including normal, ESPs, ESPs + 3-HBA, and ESPs + 4-HBA. We also found that benzaldehyde (3-HBA and 4-HBA) can stimulate astrocytes to express ER stress-related molecules after ESP treatment. The level of oxidative stress could also be decreased in astrocytes by elevating antioxidant activity and reducing ROS generation. These results suggested that benzaldehyde may be a potential therapeutic compound for human angiostrongyliasis to support brain cell survival by inducing the expression levels of ER stress- and oxidative stress-related pathways.
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16
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Rauscher B, Mueller WF, Clauder-Münster S, Jakob P, Islam MS, Sun H, Ghidelli-Disse S, Boesche M, Bantscheff M, Pflaumer H, Collier P, Haase B, Chen S, Hoffman R, Wang G, Benes V, Drewes G, Snyder M, Steinmetz LM. Patient-derived gene and protein expression signatures of NGLY1 deficiency. J Biochem 2021; 171:187-199. [PMID: 34878535 DOI: 10.1093/jb/mvab131] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 10/13/2021] [Indexed: 11/14/2022] Open
Abstract
N-Glycanase 1 (NGLY1) deficiency is a rare and complex genetic disorder. Although recent studies have shed light on the molecular underpinnings of NGLY1 deficiency, a systematic characterization of gene and protein expression changes in patient-derived cells has been lacking. Here, we performed RNA-sequencing and mass spectrometry to determine the transcriptomes and proteomes of 66 cell lines representing 4 different cell types derived from 14 NGLY1 deficient patients and 17 controls. Although NGLY1 protein levels were up to 9.5-fold downregulated in patients compared to parents, residual and likely non-functional NGLY1 protein was detectable in all patient-derived lymphoblastoid cell lines. Consistent with the role of NGLY1 as a regulator of the transcription factor Nrf1, we observed a cell type-independent downregulation of proteasomal genes in NGLY1 deficient cells. In contrast, genes involved in ribosome biogenesis and mRNA processing were upregulated in multiple cell types. In addition, we observed cell type-specific effects. For example, genes and proteins involved in glutathione synthesis, such as the glutamate-cysteine ligase subunits GCLC and GCLM, were downregulated specifically in lymphoblastoid cells. We provide a web application that enables access to all results generated in this study at https://apps.embl.de/ngly1browser. This resource will guide future studies of NGLY1 deficiency in directions that are most relevant to patients.
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Affiliation(s)
- Benedikt Rauscher
- European Molecular Biology Laboratory, Genome Biology Unit, Heidelberg, Germany, Meyerhofstrasse 1, Heidelberg, Germany, 69117
| | | | - Sandra Clauder-Münster
- European Molecular Biology Laboratory, Genome Biology Unit, Heidelberg, Germany, Meyerhofstrasse 1, Heidelberg, Germany, 69117
| | - Petra Jakob
- European Molecular Biology Laboratory, Genome Biology Unit, Heidelberg, Germany, Meyerhofstrasse 1, Heidelberg, Germany, 69117
| | - M Saiful Islam
- Department of Genetics, Stanford University School of Medicine, Stanford, California, USA
| | - Han Sun
- Department of Genetics, Stanford University School of Medicine, Stanford, California, USA
| | - Sonja Ghidelli-Disse
- Cellzome GmbH, a GlaxoSmithKline Company, Meyerhofstrasse 1, Heidelberg, Germany, 69117
| | - Markus Boesche
- Cellzome GmbH, a GlaxoSmithKline Company, Meyerhofstrasse 1, Heidelberg, Germany, 69117
| | - Marcus Bantscheff
- Cellzome GmbH, a GlaxoSmithKline Company, Meyerhofstrasse 1, Heidelberg, Germany, 69117
| | - Hannah Pflaumer
- Cellzome GmbH, a GlaxoSmithKline Company, Meyerhofstrasse 1, Heidelberg, Germany, 69117
| | - Paul Collier
- European Molecular Biology Laboratory, Genome Biology Unit, Heidelberg, Germany, Meyerhofstrasse 1, Heidelberg, Germany, 69117
| | - Bettina Haase
- European Molecular Biology Laboratory, Genome Biology Unit, Heidelberg, Germany, Meyerhofstrasse 1, Heidelberg, Germany, 69117
| | - Songjie Chen
- Department of Genetics, Stanford University School of Medicine, Stanford, California, USA
| | - Rene Hoffman
- Department of Genetics, Stanford University School of Medicine, Stanford, California, USA
| | - Guangwen Wang
- Department of Genetics, Stanford University School of Medicine, Stanford, California, USA
| | - Vladimir Benes
- European Molecular Biology Laboratory, Genome Biology Unit, Heidelberg, Germany, Meyerhofstrasse 1, Heidelberg, Germany, 69117
| | - Gerard Drewes
- Cellzome GmbH, a GlaxoSmithKline Company, Meyerhofstrasse 1, Heidelberg, Germany, 69117
| | - Michael Snyder
- Department of Genetics, Stanford University School of Medicine, Stanford, California, USA
| | - Lars M Steinmetz
- European Molecular Biology Laboratory, Genome Biology Unit, Heidelberg, Germany, Meyerhofstrasse 1, Heidelberg, Germany, 69117.,Department of Genetics, Stanford University School of Medicine, Stanford, California, USA.,Stanford Genome Technology Center, Stanford University, Palo Alto, California, USA
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17
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Hakhamaneshi MS, Abdolahi A, Vahabzadeh Z, Abdi M, Andalibi P. Toll-Like Receptor 4: A Macrophage Cell Surface Receptor Is Activated By Trimethylamine-N-Oxide. CELL JOURNAL 2021; 23:516-522. [PMID: 34837678 PMCID: PMC8588815 DOI: 10.22074/cellj.2021.7849] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Accepted: 02/03/2021] [Indexed: 01/06/2023]
Abstract
OBJECTIVE Trimethylamine-N-Oxide (TMAO) is considered as a risk factor for atherosclerosis which further leads to inflammation during atherosclerosis. The exact mechanism(s) by which TMAO induces the inflammatory reactions remains to be determined. TMAO can cause the endoplasmic reticulum (ER) stress that triggers activation of Toll-Like Receptors (TLRs). In macrophages, this process stimulates the production of proinflammatory cytokines. This study designed to evaluate the expression level of TLR4 in TMAO-treated macrophages. MATERIALS AND METHODS In this experimental study, different concentrations of TMAO (37.5, 75, 150, and 300 μM) were exposed to murine macrophage (J774A.1 cell line) for 8, 18, 24, and 48 hours. The cells were also treated with 2.5 mM of 4-phenyl butyric acid as well as 2μg/ml of tunicamycin respectively as negative and positive controls for inducing ER-stress. We measured the viability of treated cells by the MTT test. Besides, the expression levels of TLR4 gene and protein were evaluated using western blotting and reverse transcription- quantitative polymerase chain reaction (RT-qPCR) analysis. One-Way ANOVA was used for statistical analysis. RESULTS No cell death was observed in treated cells. The cells treated with 150 and 300 μM doses of TMAO for 24 hours showed a significant elevation in the protein and/or mRNA levels of TLR4 when compared to normal control or tunicamycin-treated cells. CONCLUSION Our results may in part elucidate the mechanism by which TMAO induces the macrophage inflammatory reactions in response to the induction of ER stress, similar to what happens during atherosclerosis. It also provides documentation to support the direct contribution of TLR4 in TMAO-induced inflammation.
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Affiliation(s)
| | - Alina Abdolahi
- Department of Molecular Medicine and Genetics, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Zakaria Vahabzadeh
- Department of Biochemistry, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran. .,Liver and Digestive Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Mohammad Abdi
- Cellular and Molecular Research Centre, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Pedram Andalibi
- Department of Biochemistry, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
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18
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Shih SR, Bach DM, Rondeau NC, Sam J, Lovinger NL, Lopatkin AJ, Snow JW. Honey bee sHSP are responsive to diverse proteostatic stresses and potentially promising biomarkers of honey bee stress. Sci Rep 2021; 11:22087. [PMID: 34764357 PMCID: PMC8586346 DOI: 10.1038/s41598-021-01547-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 10/29/2021] [Indexed: 11/09/2022] Open
Abstract
The pollination services provided by the honey bee are critical in both natural and agricultural ecosystems. Honey bee colonies in the United States have suffered from an increased rate of die-off in recent years, stemming from a complex set of interacting stresses that remain poorly described. Defining specific common cellular processes and cellular stress responses impacted by multiple stressors represent a key step in understanding these synergies. Proteotoxic stresses negatively impact protein synthesis, folding, and degradation. Diverse proteotoxic stresses induce expression of genes encoding small heat shock proteins (sHSP) of the expanded lethal (2) essential for life (l(2)efl) gene family. In addition to upregulation by the Integrated Stress Response (ISR), the Heat Shock Response (HSR), and the Oxidative Stress Response (OSR), our data provide first evidence that sHSP genes are upregulated by the Unfolded Protein Response (UPR). As these genes appear to be part of a core stress response that could serve as a useful biomarker for cellular stress in honey bees, we designed and tested an RT-LAMP assay to detect increased l(2)efl gene expression in response to heat-stress. While this assay provides a powerful proof of principle, further work will be necessary to link changes in sHSP gene expression to colony-level outcomes, to adapt our preliminary assay into a Point of Care Testing (POCT) assay appropriate for use as a diagnostic tool for use in the field, and to couple assay results to management recommendations.
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Affiliation(s)
- Samantha R Shih
- Biology Department, Barnard College, New York, NY, 10027, USA
| | - Dunay M Bach
- Biology Department, Barnard College, New York, NY, 10027, USA
| | | | - Jessica Sam
- Biology Department, Barnard College, New York, NY, 10027, USA
| | | | | | - Jonathan W Snow
- Biology Department, Barnard College, New York, NY, 10027, USA.
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19
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Model Identifies Genetic Predisposition of Alzheimer's Disease as Key Decider in Cell Susceptibility to Stress. Int J Mol Sci 2021; 22:ijms222112001. [PMID: 34769426 PMCID: PMC8584528 DOI: 10.3390/ijms222112001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/22/2021] [Accepted: 10/27/2021] [Indexed: 11/28/2022] Open
Abstract
Accumulation of unfolded/misfolded proteins in neuronal cells perturbs endoplasmic reticulum homeostasis, triggering a stress cascade called unfolded protein response (UPR), markers of which are upregulated in Alzheimer’s disease (AD) brain specimens. We measured the UPR dynamic response in three human neuroblastoma cell lines overexpressing the wild-type and two familial AD (FAD)-associated mutant forms of amyloid precursor protein (APP), the Swedish and Swedish-Indiana mutations, using gene expression analysis. The results reveal a differential response to subsequent environmental stress depending on the genetic background, with cells overexpressing the Swedish variant of APP exhibiting the highest global response. We further developed a dynamic mathematical model of the UPR that describes the activation of the three branches of this stress response in response to unfolded protein accumulation. Model-based analysis of the experimental data suggests that the mutant cell lines experienced a higher protein load and subsequent magnitude of transcriptional activation compared to the cells overexpressing wild-type APP, pointing to higher susceptibility of mutation-carrying cells to stress. The model was then used to understand the effect of therapeutic agents salubrinal, lithium, and valproate on signalling through different UPR branches. This study proposes a novel integrated platform to support the development of therapeutics for AD.
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Kalwat MA, Scheuner D, Rodrigues-dos-Santos K, Eizirik DL, Cobb MH. The Pancreatic ß-cell Response to Secretory Demands and Adaption to Stress. Endocrinology 2021; 162:bqab173. [PMID: 34407177 PMCID: PMC8459449 DOI: 10.1210/endocr/bqab173] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Indexed: 02/06/2023]
Abstract
Pancreatic β cells dedicate much of their protein translation capacity to producing insulin to maintain glucose homeostasis. In response to increased secretory demand, β cells can compensate by increasing insulin production capability even in the face of protracted peripheral insulin resistance. The ability to amplify insulin secretion in response to hyperglycemia is a critical facet of β-cell function, and the exact mechanisms by which this occurs have been studied for decades. To adapt to the constant and fast-changing demands for insulin production, β cells use the unfolded protein response of the endoplasmic reticulum. Failure of these compensatory mechanisms contributes to both type 1 and 2 diabetes. Additionally, studies in which β cells are "rested" by reducing endogenous insulin demand have shown promise as a therapeutic strategy that could be applied more broadly. Here, we review recent findings in β cells pertaining to the metabolic amplifying pathway, the unfolded protein response, and potential advances in therapeutics based on β-cell rest.
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Affiliation(s)
- Michael A Kalwat
- Indiana Biosciences Research Institute, Indianapolis, IN 46202, USA
| | - Donalyn Scheuner
- Indiana Biosciences Research Institute, Indianapolis, IN 46202, USA
| | | | - Decio L Eizirik
- Indiana Biosciences Research Institute, Indianapolis, IN 46202, USA
- ULB Center for Diabetes Research, Medical Faculty, Université Libre de Bruxelles, Brussels, Belgium
| | - Melanie H Cobb
- Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
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Induction of Premature Cell Senescence Stimulated by High Doses of Antioxidants Is Mediated by Endoplasmic Reticulum Stress. Int J Mol Sci 2021; 22:ijms222111851. [PMID: 34769282 PMCID: PMC8584632 DOI: 10.3390/ijms222111851] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 10/26/2021] [Accepted: 10/29/2021] [Indexed: 12/19/2022] Open
Abstract
In our previous study, we found that high doses of several substances with antioxidant capacities (Tempol, resveratrol, diphenyleneiodonium) can cause genotoxic stress and induce premature senescence in the human mesenchymal stem cells (MSCs). Here, using whole-transcriptome analysis, we revealed the signs of endoplasmic reticulum stress and unfolded protein response (UPR) in MSCs stressed with Tempol and resveratrol. In addition, we found the upregulation of genes, coding the UPR downstream target APC/C, and E3 ubiquitin ligase that regulate the stability of cell cycle proteins. We performed the molecular analysis, which further confirmed the untimely degradation of APC/C targets (cyclin A, geminin, and Emi1) in MSCs treated with antioxidants. Human fibroblasts responded to antioxidant applications similarly. We conclude that endoplasmic reticulum stress and impaired DNA synthesis regulation can be considered as potential triggers of cell damage and premature senescence stimulated by high-dose antioxidant treatments.
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22
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IRE1-Mediated Unfolded Protein Response Promotes the Replication of Tick-Borne Flaviviruses in a Virus and Cell-Type Dependent Manner. Viruses 2021; 13:v13112164. [PMID: 34834970 PMCID: PMC8619205 DOI: 10.3390/v13112164] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 10/19/2021] [Accepted: 10/22/2021] [Indexed: 12/15/2022] Open
Abstract
Tick-borne flaviviruses (TBFV) can cause severe neurological complications in humans, but differences in tissue tropism and pathogenicity have been described for individual virus strains. Viral protein synthesis leads to the induction of the unfolded protein response (UPR) within infected cells. The IRE1 pathway has been hypothesized to support flavivirus replication by increasing protein and lipid biogenesis. Here, we investigated the role of the UPR in TBFV infection in human astrocytes, neuronal and intestinal cell lines that had been infected with tick-borne encephalitis virus (TBEV) strains Neudoerfl and MucAr-HB-171/11 as well as Langat virus (LGTV). Both TBEV strains replicated better than LGTV in central nervous system (CNS) cells. TBEV strain MucAr-HB-171/11, which is associated with gastrointestinal symptoms, replicated best in intestinal cells. All three viruses activated the inositol-requiring enzyme 1 (IRE1) pathway via the X-box binding protein 1 (XBP1). Interestingly, the neurotropic TBEV strain Neudoerfl induced a strong upregulation of XBP1 in all cell types, but with faster kinetics in CNS cells. In contrast, TBEV strain MucAr-HB-171/11 failed to activate the IRE1 pathway in astrocytes. The low pathogenic LGTV led to a mild induction of IRE1 signaling in astrocytes and intestinal cells. When cells were treated with IRE1 inhibitors prior to infection, TBFV replication in astrocytes was significantly reduced. This confirms a supporting role of the IRE1 pathway for TBFV infection in relevant viral target cells and suggests a correlation between viral tissue tropism and the cell-type dependent induction of the unfolded protein response.
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Kumar M, Garg H, Gupta N, Sharma A, Kaushal S, Kumar R, Dinda AK. Glucose- regulated protein 78 (GRP78) in renal cell carcinoma: A novel biomarker for predicting tumor behavior. Heliyon 2021; 7:e07300. [PMID: 34195416 PMCID: PMC8239724 DOI: 10.1016/j.heliyon.2021.e07300] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 04/17/2021] [Accepted: 06/09/2021] [Indexed: 11/30/2022] Open
Abstract
Objective To study the mRNA and protein expression of GRP78 in tumor and serum of the RCC patients and compare with the controls and to correlate the expression with the grade and stage of RCC. Materials and methods A prospective cohort study involving 60 patients planned for radical/partial nephrectomy for primary RCC between July 2017 to June 2019. The RCC and adjacent non-tumorous renal tissues (Control) along with serum samples of patients were collected. Control for the serum samples is from the patients undergoing simple nephrectomy for non-functioning kidney due to benign etiology. The GRP78 expression was studied using RT-PCR for mRNA expression, Western blot analysis and immunohistochemistry (IHC) for protein expression and using ELISA in serum for both the subjects and controls. Results Mean age of patients was 50.3 years. The mRNA and protein expression of GRP78 in tissue samples were significantly higher in RCC patients as compared to controls (p < 0.001). IHC also demonstrated significantly higher expression in tumour samples as compared to controls (p < 0.001). Circulatory levels of GRP78 in serum samples were also significantly increased (p < 0.0001) in RCC patients in comparison to control subjects. The expression of GRP78 in circulation significantly correlated with the pathological tumor stage (p = 0.03), grade of disease (p < 0.001). Conclusion The GRP78 in RCC is significantly upregulated both at molecular and protein level expression. The overexpression of GRP78 correlates with the stage and grade of disease, thereby, highlighting its prognostic ability.
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Affiliation(s)
- Manoj Kumar
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
| | - Harshit Garg
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
| | - Nidhi Gupta
- Department of Biochemistry, All India Institute of Medical Sciences, New Delhi, India
| | - Alpana Sharma
- Department of Biochemistry, All India Institute of Medical Sciences, New Delhi, India
| | - Seema Kaushal
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - Rajeev Kumar
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
| | - Amit Kumar Dinda
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
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Calcium as a reliable marker for the quantitative assessment of endoplasmic reticulum stress in live cells. J Biol Chem 2021; 296:100779. [PMID: 34000299 PMCID: PMC8191341 DOI: 10.1016/j.jbc.2021.100779] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 05/01/2021] [Accepted: 05/11/2021] [Indexed: 11/20/2022] Open
Abstract
Calcium (Ca2+) is an essential mineral of endoplasmic reticulum (ER) luminal biochemistry because of the Ca2+ dependence of ER-resident chaperones charged with folding de novo proteins that transit this cellular compartment. ER Ca2+ depletion reduces the ability of chaperones to properly fold the proteins entering the ER, thus leading to an accumulation of misfolded proteins and the onset of a state known as ER stress. However, not all conditions that cause ER stress do so in a manner dependent on ER Ca2+ depletion. Agents such as tunicamycin inhibit the glycosylation of de novo polypeptides, a key step in the maturation process of newly synthesized proteins. Despite this established effect of tunicamycin, our understanding of how such conditions modulate ER Ca2+ levels is still limited. In the present study, we report that a variety of ER stress–inducing agents that have not been known to directly alter ER Ca2+ homeostasis can also cause a marked reduction in ER Ca2+ levels. Consistent with these observations, protecting against ER stress using small chemical chaperones, such as 4-phenylbutyrate and tauroursodeoxycholic acid, also attenuated ER Ca2+ depletion caused by these agents. We also describe a novel high-throughput and low-cost assay for the rapid quantification of ER stress using ER Ca2+ levels as a surrogate marker. This report builds on our understanding of ER Ca2+ levels in the context of ER stress and also provides the scientific community with a new, reliable tool to study this important cellular process in vitro.
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UFMylation inhibits the proinflammatory capacity of interferon-γ-activated macrophages. Proc Natl Acad Sci U S A 2021; 118:2011763118. [PMID: 33372156 DOI: 10.1073/pnas.2011763118] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Macrophages activated with interferon-γ (IFN-γ) in combination with other proinflammatory stimuli, such as lipopolysaccharide or tumor necrosis factor-α (TNF-α), respond with transcriptional and cellular changes that enhance clearance of intracellular pathogens at the risk of damaging tissues. IFN-γ effects must therefore be carefully balanced with inhibitory mechanisms to prevent immunopathology. We performed a genome-wide CRISPR knockout screen in a macrophage cell line to identify negative regulators of IFN-γ responses. We discovered an unexpected role of the ubiquitin-fold modifier (Ufm1) conjugation system (herein UFMylation) in inhibiting responses to IFN-γ and lipopolysaccharide. Enhanced IFN-γ activation in UFMylation-deficient cells resulted in increased transcriptional responses to IFN-γ in a manner dependent on endoplasmic reticulum stress responses involving Ern1 and Xbp1. Furthermore, UFMylation in myeloid cells is required for resistance to influenza infection in mice, indicating that this pathway modulates in vivo responses to infection. These findings provide a genetic roadmap for the regulation of responses to a key mediator of cellular immunity and identify a molecular link between the UFMylation pathway and immune responses.
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26
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Pharmacological Activation of Nrf2 by Rosolic Acid Attenuates Endoplasmic Reticulum Stress in Endothelial Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:2732435. [PMID: 33897939 PMCID: PMC8052152 DOI: 10.1155/2021/2732435] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 11/17/2020] [Accepted: 12/05/2020] [Indexed: 12/18/2022]
Abstract
Endoplasmic reticulum (ER) plays a key role in the folding, modification, and trafficking of proteins. When the homeostasis of the ER is disturbed, un/misfolded proteins accumulate in the ER which leads to ER stress. Sustained ER stress results in apoptosis, which is associated with various diseases. Nuclear factor erythroid 2-related factor 2 (Nrf2) is a major transcription factor in redox homeostasis by regulating various genes associated with detoxification and cell-protective mechanisms. We found that Rosolic acid (RA) treatment dose-dependently activates Nrf2 in endothelial cells using the enzyme fragment complementation assay. The cytoprotective role of RA against ER stress-induced endothelial apoptosis and its molecular mechanism was explored in the present study. The Nrf2 and its target genes, as well as ER stress marker expressions, were measured by qPCR in ER stress-exposed endothelial cells. The contribution of Nrf2 in RA-mediated defense mechanism in endothelial cells was established by knockout studies using Nrf2-CRISPR/Cas9. The treatment with RA to ER stress-induced endothelial cells exhibited activation of Nrf2, as demonstrated by Nrf2 translocation and reduction of ER stress markers. We found that the Nrf2 knockout sensitized the endothelial cells against ER stress, and further, RA failed to mediate its cytoprotective effect. Proteomic studies using LC-MS/MS revealed that among the 1370 proteins detected, we found 296 differentially regulated proteins in ER stress-induced endothelial cells, and RA administration ameliorated 71 proteins towards the control levels. Of note, the ER stress in endothelial cells was attenuated by the treatment with the RA, suggesting the role of the Nrf2 activator in the pathological conditions of ER stress-associated diseases.
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JAK/STAT inhibitor therapy partially rescues the lipodystrophic autoimmune phenotype in Clec16a KO mice. Sci Rep 2021; 11:7372. [PMID: 33795715 PMCID: PMC8016875 DOI: 10.1038/s41598-021-86493-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 03/08/2021] [Indexed: 02/06/2023] Open
Abstract
CLEC16A is implicated in multiple autoimmune diseases. We generated an inducible whole-body knockout (KO), Clec16aΔUBC mice to address the role of CLEC16A loss of function. KO mice exhibited loss of adipose tissue and severe weight loss in response to defective autophagic flux and exaggerated endoplasmic reticulum (ER) stress and robust cytokine storm. KO mice were glucose tolerant and displayed a state of systemic inflammation with elevated antibody levels, including IgM, IgA, Ig2b and IgG3, significantly reduced circulating insulin levels in the presence of normal food consumption. Metabolic analysis revealed disturbances in the lipid profile, white adipose decreasing concomitantly with enhanced inflammatory response, and energy wasting. Mechanistically, endoplasmic reticulum (ER) stress triggers excessive hormone sensitive lipases (HSL) mediated lipolysis which contributes to adipose inflammation via activation of JAK-STAT, stress kinases (ERK1/2, P38, JNK), and release of multiple proinflammatory mediators. Treatment with a JAK-STAT inhibitor (tofacitinib) partially rescued the inflammatory lipodystrophic phenotype and improved survival of Clec16aΔUBC mice by silencing cytokine release and modulating ER stress, lipolysis, mitophagy and autophagy. These results establish a mechanistic link between CLEC16A, lipid metabolism and the immune system perturbations. In summary, our Clec16aΔUBC mouse model highlights multifaceted roles of Clec16a in normal physiology, including a novel target for weight regulation and mutation-induced pathophysiology.
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Wang J, Wong WP, Link EO, Olivares S, Adelman CT, Henkel AS, El Muayed M. Single well, single-common primer pair, dual probe, duplex qPCR assay for the quantification of mRNA splicing variants. Biol Methods Protoc 2021; 6:bpab002. [PMID: 33655078 PMCID: PMC7903517 DOI: 10.1093/biomethods/bpab002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/31/2021] [Accepted: 02/05/2021] [Indexed: 12/03/2022] Open
Abstract
Quantifying the ratio of alternatively spliced mRNA variants of genes with known alternative splicing variants is highly relevant for many applications. Herein, we describe the validation of a quantitative PCR design for the simplified quantification of known mRNA splice variants. The assay uses a single-common primer pair, dual probe design for the determination of splicing variants in a single well configuration. We used murine XBP-1 splicing variants, XBP-1S and XBP-1U, to validate and demonstrate the performance characteristics of this approach. Using synthetic XBP-1S and XBP-1U cDNA as well as cDNA synthesized from mouse beta-cell line MIN6, we established the performance parameters and dynamic range of the assay. Reliable quantification of both variants at varying concentration gradients was shown. No cross detection of XBP-1U by the XBP-1S probe was detected and only marginal XBP-1S cross detection by the XBP-1U probe was detected at high concentration gradients that are unlikely to be relevant. We demonstrated that the assay accurately detected changes of XBP-1 splice variants in mouse liver subjected to pharmacologically induced ER stress without the need for normalization to a reference gene.
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Affiliation(s)
- Janice Wang
- Division of Endocrinology, Metabolism and Molecular Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Winifred P Wong
- Division of Endocrinology, Metabolism and Molecular Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Emma O Link
- Masters of Biomedical Studies Program, Drexel University, Philadelphia, PA 19104, USA
| | - Shantel Olivares
- Division of Gastroenterology and Hepatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Cade T Adelman
- Division of Endocrinology, Metabolism and Molecular Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.,Department of Biomedical Engineering, George Washington University School of Engineering and Applied Sciences, Washington, DC 20052, USA
| | - Anne S Henkel
- Division of Gastroenterology and Hepatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Malek El Muayed
- Division of Endocrinology, Metabolism and Molecular Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
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Read DE, Gupta A, Cawley K, Fontana L, Agostinis P, Samali A, Gupta S. Downregulation of miR-17-92 Cluster by PERK Fine-Tunes Unfolded Protein Response Mediated Apoptosis. Life (Basel) 2021; 11:life11010030. [PMID: 33418948 PMCID: PMC7825066 DOI: 10.3390/life11010030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/31/2020] [Accepted: 01/02/2021] [Indexed: 01/07/2023] Open
Abstract
An important event in the unfolded protein response (UPR) is activation of the endoplasmic reticulum (ER) kinase PERK. The PERK signalling branch initially mediates a prosurvival response, which progresses to a proapoptotic response upon prolonged ER stress. However, the molecular mechanisms of PERK-mediated cell death are not well understood. Here we show that expression of the primary miR-17-92 transcript and mature miRNAs belonging to the miR-17-92 cluster are decreased during UPR. We found that miR-17-92 promoter reporter activity was reduced during UPR in a PERK-dependent manner. Furthermore, we show that activity of the miR-17-92 promoter is repressed by ectopic expression of ATF4 and NRF2. Promoter deletion analysis mapped the region responding to UPR-mediated repression to a site in the proximal region of the miR-17-92 promoter. Hypericin-mediated photo-oxidative ER damage reduced the expression of miRNAs belonging to the miR-17-92 cluster in wild-type but not in PERK-deficient cells. Importantly, ER stress-induced apoptosis was inhibited upon miR-17-92 overexpression in SH-SY5Y and H9c2 cells. Our results reveal a novel function for ATF4 and NRF2, where repression of the miR-17-92 cluster plays an important role in ER stress-mediated apoptosis. Mechanistic details are provided for the potentiation of cell death via sustained PERK signalling mediated repression of the miR-17-92 cluster.
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Affiliation(s)
- Danielle E. Read
- Discipline of Pathology, Cancer Progression and Treatment Research Group, Lambe Institute for Translational Research, School of Medicine, National University of Ireland-Galway, H91 TK33 Galway, Ireland;
| | - Ananya Gupta
- Discipline of Physiology, School of Medicine, National University of Ireland-Galway, H91 TK33 Galway, Ireland;
| | - Karen Cawley
- Apoptosis Research Centre, School of Natural Sciences, National University of Ireland Galway, H91 TK33 Galway, Ireland; (K.C.); (A.S.)
| | - Laura Fontana
- Ragon Institute of MGH, MIT and Harvard, Cambridge, 02138 MA, USA;
| | - Patrizia Agostinis
- Cell Death Research and Therapy Group, Department of Cellular and Molecular Medicine, KU Leuven, 3000 Leuven, Belgium;
- VIB Center for Cancer Biology Research, 3000 Leuven, Belgium
| | - Afshin Samali
- Apoptosis Research Centre, School of Natural Sciences, National University of Ireland Galway, H91 TK33 Galway, Ireland; (K.C.); (A.S.)
| | - Sanjeev Gupta
- Discipline of Pathology, Cancer Progression and Treatment Research Group, Lambe Institute for Translational Research, School of Medicine, National University of Ireland-Galway, H91 TK33 Galway, Ireland;
- Correspondence:
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Kim P, Scott MR, Meador-Woodruff JH. Dysregulation of the unfolded protein response (UPR) in the dorsolateral prefrontal cortex in elderly patients with schizophrenia. Mol Psychiatry 2021; 26:1321-1331. [PMID: 31578497 PMCID: PMC7113111 DOI: 10.1038/s41380-019-0537-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 09/10/2019] [Accepted: 09/23/2019] [Indexed: 12/12/2022]
Abstract
Abnormalities in protein localization, function, and posttranslational modifications are targets of schizophrenia (SCZ) research. As a major contributor to the synthesis, folding, trafficking, and modification of proteins, the endoplasmic reticulum (ER) is well-positioned to sense cellular stress. The unfolded protein response (UPR) is an evolutionarily conserved adaptive reaction to environmental and pathological perturbation in ER function. The UPR is a highly orchestrated and complex cellular response, which is mediated through the ER chaperone protein, BiP, three known ER transmembrane stress sensors, protein kinase RNA-like ER kinase (PERK), activating transcription factor-6 (ATF6), inositol requiring enzyme 1α (IRE1α), and their downstream effectors. In this study, we measured protein expression and phosphorylation states of UPR sensor pathway proteins in the dorsolateral prefrontal cortex (DLPFC) of 22 matched pairs of elderly SCZ and comparison subjects. We observed increased protein expression of BiP, decreased PERK, and decreased phosphorylation of IRE1α. We also observed decreased p-JNK2 and increased sXBP1, downstream targets of the IRE1α arm of the UPR. The disconnect between decreased p-IRE1α and increased sXBP1 protein expression led us to measure sXbp1 mRNA. We observed increased expression of the ratio of sXbp1/uXbp1 transcripts, suggesting that splicing of Xbp1 mRNA by IRE1α is increased and drives upregulation of sXBP1 protein expression. These findings suggest an abnormal pattern of UPR activity in SCZ, with specific dysregulation of the IRE1α arm. Dysfunction of this system may lead to abnormal responses to cellular stressors and contribute to protein processing abnormalities previously observed in SCZ.
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Affiliation(s)
- Pitna Kim
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA.
| | - Madeline R. Scott
- grid.265892.20000000106344187Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, Birmingham, AL 35294 USA
| | - James H. Meador-Woodruff
- grid.265892.20000000106344187Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, Birmingham, AL 35294 USA
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Yadavalli T, Suryawanshi R, Koganti R, Hopkins J, Ames J, Koujah L, Iqbal A, Madavaraju K, Agelidis A, Shukla D. Standalone or combinatorial phenylbutyrate therapy shows excellent antiviral activity and mimics CREB3 silencing. SCIENCE ADVANCES 2020; 6:eabd9443. [PMID: 33277262 PMCID: PMC7821892 DOI: 10.1126/sciadv.abd9443] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 10/22/2020] [Indexed: 05/12/2023]
Abstract
Herpesviruses are ubiquitous human pathogens that tightly regulate many cellular pathways including the unfolded protein response to endoplasmic reticulum (ER) stress. Pharmacological modulation of this pathway results in the inhibition of viral replication. In this study, we tested 4-phenylbutyrate (PBA), a chemical chaperone-based potent alleviator of ER stress, for its effects on herpes simplex virus (HSV) type 1 infection. Through in vitro studies, we observed that application of PBA to HSV-infected cells results in the down-regulation of a proviral, ER-localized host protein CREB3 and a resultant inhibition of viral protein synthesis. PBA treatment caused viral inhibition in cultured human corneas and human skin grafts as well as murine models of ocular and genital HSV infection. Thus, we propose that this drug can provide an alternative to current antivirals to treat both ocular HSV-1 and genital HSV-2 infections and may be a strong candidate for human trials.
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Affiliation(s)
- Tejabhiram Yadavalli
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Rahul Suryawanshi
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Raghuram Koganti
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - James Hopkins
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Joshua Ames
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Lulia Koujah
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Aqsa Iqbal
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Krishnaraju Madavaraju
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Alex Agelidis
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Deepak Shukla
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA.
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL 60612, USA
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Kong X, Wang X, Qin Y, Han J. Effects of sunset yellow on proliferation and differentiation of intestinal epithelial cells in murine intestinal organoids. J Appl Toxicol 2020; 41:953-963. [DOI: 10.1002/jat.4080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 08/14/2020] [Accepted: 09/02/2020] [Indexed: 12/15/2022]
Affiliation(s)
- Xiunan Kong
- School of Food Science and Biotechnology Zhejiang Gongshang University Hangzhou China
| | - Xiu Wang
- School of Food Science and Biotechnology Zhejiang Gongshang University Hangzhou China
| | - Yumei Qin
- School of Food Science and Biotechnology Zhejiang Gongshang University Hangzhou China
| | - Jianzhong Han
- School of Food Science and Biotechnology Zhejiang Gongshang University Hangzhou China
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Li J, Snyder EY, Tang FHF, Pasqualini R, Arap W, Sidman RL. Nna1 gene deficiency triggers Purkinje neuron death by tubulin hyperglutamylation and ER dysfunction. JCI Insight 2020; 5:136078. [PMID: 33004692 PMCID: PMC7566705 DOI: 10.1172/jci.insight.136078] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 08/26/2020] [Indexed: 02/06/2023] Open
Abstract
Posttranslational glutamylation/deglutamylation balance in tubulins influences dendritic maturation and neuronal survival of cerebellar Purkinje neurons (PNs). PNs and some additional neuronal types degenerate in several spontaneous, independently occurring Purkinje cell degeneration (pcd) mice featuring mutant neuronal nuclear protein induced by axotomy (Nna1), a deglutamylase gene. This defective deglutamylase allows glutamylases to form hyperglutamylated tubulins. In pcd, all PNs die during postnatal “adolescence.” Neurons in some additional brain regions also die, mostly later than PNs. We show in laser capture microdissected single PNs, in cerebellar granule cell neuronal clusters, and in dissected hippocampus and substantia nigra that deglutamase mRNA and protein were virtually absent before pcd PNs degenerated, whereas glutaminase mRNA and protein remained normal. Hyperglutamylated microtubules and dimeric tubulins accumulated in pcd PNs and were involved in pcd PN death by glutamylase/deglutamylase imbalance. Importantly, treatment with a microtubule depolymerizer corrected the glutamylation/deglutamylation ratio, increasing PN survival. Further, before onset of neuronal death, pcd PNs displayed prominent basal polylisosomal masses rich in ER. We propose a “seesaw” metamorphic model summarizing mutant Nna1-induced tubulin hyperglutamylation, the pcd’s PN phenotype, and report that the neuronal disorder involved ER stress, unfolded protein response, and protein synthesis inhibition preceding PN death by apoptosis/necroptosis. Purkinje cell degeneration is due to ER stress, unfolded protein response, and protein synthesis inhibition preceding Purkinje neuron death by apoptosis/necroptosis.
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Affiliation(s)
- Jianxue Li
- Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Evan Y Snyder
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Fenny HF Tang
- Rutgers Cancer Institute of New Jersey and Division of Cancer Biology, Department of Radiation Oncology, Rutgers New Jersey Medical School, Newark, New Jersey, USA
| | - Renata Pasqualini
- Rutgers Cancer Institute of New Jersey and Division of Cancer Biology, Department of Radiation Oncology, Rutgers New Jersey Medical School, Newark, New Jersey, USA
| | - Wadih Arap
- Rutgers Cancer Institute of New Jersey and Division of Hematology/Oncology, Department of Medicine, Rutgers New Jersey Medical School, Newark, New Jersey, USA
| | - Richard L Sidman
- Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
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34
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Luís A, Hackl M, Jafarmadar M, Keibl C, Jilge JM, Grillari J, Bahrami S, Kozlov AV. Circulating miRNAs Associated With ER Stress and Organ Damage in a Preclinical Model of Trauma Hemorrhagic Shock. Front Med (Lausanne) 2020; 7:568096. [PMID: 33072784 PMCID: PMC7542230 DOI: 10.3389/fmed.2020.568096] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 08/18/2020] [Indexed: 12/26/2022] Open
Abstract
Circulating microRNAs (miRNA) alterations have been reported in severe trauma patients but the pathophysiological relevance of these changes is still unclear. miRNAs are critical biologic regulators of pathological events such as hypoxia and inflammation, which are known to induce endoplasmic reticulum (ER) stress. ER stress is emerging as an important process contributing to the development of single and/or multiple organ dysfunction after trauma hemorrhagic shock (THS) accompanied by impaired tissue microcirculation and inflammation. Here, we aim to bring new insights into the involvement of miRNAs associated with ER stress in THS. THS was induced in rats by a median laparotomy and blood withdrawal until mean arterial pressure (MAP) dropped to 30-35 mmHg followed by a restrictive (40 min) and full reperfusion (60 min) with Ringer's solution. Tunicamycin was used to induce ER stress. Blood samples were collected 24 h after THS for the determination of pathological changes in the blood (PCB) and circulating miRNAs. Plasma levels of circulating miRNAs were compared between THS, tunicamycin, and sham groups and correlated to biomarkers of PCB. MiRNA profile of THS animals showed that 40 out of 91 (44%) miRNAs were significantly upregulated compared to sham (p < 0.01). The data showed a very strong correlation between liver injury and miR−122-5p (r = 0.91, p < 0.00001). MiR-638, miR−135a-5p, miR−135b-5p, miR-668-3p, miR-204-5p, miR−146a-5p, miR−200a-3p, miR−17-5p, miR−30a-5p, and miR−214-3p were found positively correlated with lactate (r > 0.7, p < 0.05), and negatively with base excess (r ≤ 0.8, p < 0.05) and bicarbonate (r ≤ 0.8, p < 0.05), which are clinical parameters that reflected the shock severity. Tunicamycin significantly modified the microRNA profile of the animals, 33 out of 91 miRNAs were found differentially expressed. In addition, principal component analysis revealed that THS and tunicamycin induced similar changes in plasma miRNA patterns. Strikingly, the data showed that 15 (25.9%) miRNAs were regulated by both THS and tunicamycin (p < 0.01). This included miR−122-5p, a liver-specific microRNA, but also miR−17-5p and miR-125b-5p which are miRNAs remarkably involved in unfolded protein response (UPR)-mediating pro-survival signaling (IRE1α). Since miRNAs associated with ER stress are clearly correlated with THS, our data strongly suggest that interaction between miRNAs and ER stress is an important pathologic event occurring during THS. Overall, we consider that the miRNA profile developed in this study can provide a rationale for the development of bench-to-bedside strategies that target miRNAs in critical care diseases or be used as biomarkers in the prognosis of trauma patients.
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Affiliation(s)
- Andreia Luís
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria
| | - Matthias Hackl
- TAmiRNA GmbH, Vienna, Austria.,Austrian Cluster for Tissue Regeneration, Medical University of Vienna, Vienna, Austria
| | - Mohammad Jafarmadar
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria
| | - Claudia Keibl
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria
| | - Julia M Jilge
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria
| | - Johannes Grillari
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria.,Austrian Cluster for Tissue Regeneration, Medical University of Vienna, Vienna, Austria.,Christian Doppler Laboratory for Biotechnology of Skin Aging, Department of Biotechnology, Institute of Molecular Biotechnology, BOKU-University of Natural Resources and Life Sciences, Vienna, Austria
| | - Soheyl Bahrami
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria
| | - Andrey V Kozlov
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria.,Laboratory of Navigational Redox Lipidomics and Department of Human Pathology, IM Sechenov Moscow State Medical University, Moscow, Russia
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35
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Huff AL, Evgin L, Thompson J, Kottke T, Driscoll CB, Tonne J, Wongthida P, Schuelke M, Shim KG, Mer G, Ramirez-Alvarado M, Vile R. Vesicular Stomatitis Virus Encoding a Destabilized Tumor Antigen Improves Activation of Anti-tumor T Cell Responses. Mol Ther 2020; 28:2540-2552. [PMID: 32877695 DOI: 10.1016/j.ymthe.2020.08.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/22/2020] [Accepted: 08/19/2020] [Indexed: 12/20/2022] Open
Abstract
Enhancing the immunogenicity of tumor-associated antigens would represent a major advance for anti-tumor vaccination strategies. Here, we investigated structure-directed antigen destabilization as a strategy to improve the degradation, immunogenic epitope presentation, and T cell activation against a vesicular stomatitis virus (VSV)-encoded tumor antigen. We used the crystal structure of the model antigen ovalbumin to identify charge-disrupting amino acid mutations that were predicted to decrease the stability of the protein. One mutation, OVA-C12R, significantly reduced the half-life of the protein and was preferentially degraded in a 26-S proteasomal-dependent manner. The destabilized ovalbumin protein exhibited enhanced presentation of the major histocompatibility complex (MHC) class I immunogenic epitope, SIINFEKL, on the surface of B16F10 cells or murine bone marrow-derived dendritic cells (BMDCs) in vitro. Enhanced presentation correlated with better recognition by cognate CD8 OT-I T cells as measured by activation, proliferation, and effector cytokine production. Finally, VSV encoding the degradation-prone antigen was better able to prime an antigen ovalbumin-specific CD8 T cell response in vivo without altering the anti-viral CD8 T cell response. Our studies highlight that not only is the choice of antigen in cancer vaccines of importance, but that emphasis should be placed on modifying antigen quality to ensure optimal priming of anti-tumor responses.
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Affiliation(s)
- Amanda L Huff
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN 55905, USA; Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, MN 55905, USA
| | - Laura Evgin
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Jill Thompson
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Tim Kottke
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Christopher B Driscoll
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN 55905, USA; Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, MN 55905, USA
| | - Jason Tonne
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | | | | | - Kevin G Shim
- Department of Immunology, Mayo Clinic, Rochester, MN 55905, USA
| | - Georges Mer
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN 55905, USA
| | - Marina Ramirez-Alvarado
- Department of Immunology, Mayo Clinic, Rochester, MN 55905, USA; Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN 55905, USA
| | - Richard Vile
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN 55905, USA; Department of Immunology, Mayo Clinic, Rochester, MN 55905, USA; Leeds Institute of Cancer and Pathology, Faculty of Medicine and Health, University of Leeds, St James's University Hospital, Beckett Street, Leeds, West Yorkshire LS9 7TF, UK.
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36
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Sharma RB, Darko C, Alonso LC. Intersection of the ATF6 and XBP1 ER stress pathways in mouse islet cells. J Biol Chem 2020; 295:14164-14177. [PMID: 32788214 DOI: 10.1074/jbc.ra120.014173] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 08/06/2020] [Indexed: 12/20/2022] Open
Abstract
Success or failure of pancreatic beta cell adaptation to ER stress is a determinant of diabetes susceptibility. The ATF6 and IRE1/XBP1 pathways are separate ER stress-response effectors important to beta cell health and function. ATF6α. and XBP1 direct overlapping transcriptional responses in some cell types. However, the signaling dynamics and interdependence of ATF6α and XBP1 in pancreatic beta cells have not been explored. To assess pathway-specific signal onset, we performed timed exposures of primary mouse islet cells to ER stressors and measured the early transcriptional response. Comparing the time course of induction of ATF6 and XBP1 targets suggested that the two pathways have similar response dynamics. The role of ATF6α in target induction was assessed by acute knockdown using islet cells from Atf6α flox/flox mice transduced with adenovirus expressing Cre recombinase. Surprisingly, given the mild impact of chronic deletion in mice, acute ATF6α knockdown markedly reduced ATF6-pathway target gene expression under both basal and stressed conditions. Intriguingly, although ATF6α knockdown did not alter Xbp1 splicing dynamics or intensity, it did reduce induction of XBP1 targets. Inhibition of Xbp1 splicing did not decrease induction of ATF6α targets. Taken together, these data suggest that the XBP1 and ATF6 pathways are simultaneously activated in islet cells in response to acute stress and that ATF6α is required for full activation of XBP1 targets, but XBP1 is not required for activation of ATF6α targets. These observations improve understanding of the ER stress transcriptional response in pancreatic islets.
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Affiliation(s)
- Rohit B Sharma
- Division of Endocrinology, Diabetes and Metabolism, Weill Cornell Medicine, New York, New York, USA .,Weill Center for Metabolic Health, Weill Cornell Medicine, New York, New York, USA
| | - Christine Darko
- Division of Endocrinology, Diabetes and Metabolism, Weill Cornell Medicine, New York, New York, USA.,Weill Center for Metabolic Health, Weill Cornell Medicine, New York, New York, USA
| | - Laura C Alonso
- Division of Endocrinology, Diabetes and Metabolism, Weill Cornell Medicine, New York, New York, USA .,Weill Center for Metabolic Health, Weill Cornell Medicine, New York, New York, USA
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37
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The Impact of Sugar-Sweetened Beverage Consumption on the Liver: A Proteomics-based Analysis. Antioxidants (Basel) 2020; 9:antiox9070569. [PMID: 32630236 PMCID: PMC7402188 DOI: 10.3390/antiox9070569] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 06/15/2020] [Accepted: 06/19/2020] [Indexed: 12/24/2022] Open
Abstract
Cardiometabolic complications such as the metabolic syndrome and Type 2 Diabetes Mellitus (T2DM) are major causes of global morbidity and mortality. As sugar-sweetened beverages (SSBs) are implicated in this process, this study aimed to obtain greater mechanistic insights. Male Wistar rats (~200 g) were gavaged with a local SSB every day for a period of six months while the control group was gavaged with an iso-volumetric amount of water. Experimental dosages were calculated according to the surface area-to-volume ratio and were equivalent to 125 mL/day (in human terms). A proteomic analysis was performed on isolated liver samples and thereafter, markers of endoplasmic reticulum (ER) stress, antioxidant/oxidant capacity, calcium regulation, and mitochondrial functionality were assessed. These data show that SSB consumption resulted in (a) the induction of mild hepatic ER stress; (b) altered hepatic mitochondrial dynamics; and (c) perturbed calcium handling across mitochondria-associated ER membranes. Despite significant changes in markers of ER stress, the antioxidant response and calcium handling (proteomics data), the liver is able to initiate adaptive responses to counteract such stressors. However, the mitochondrial data showed increased fission and decreased fusion that may put the organism at risk for developing insulin resistance and T2DM in the longer term.
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38
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CellCountCV-A Web-Application for Accurate Cell Counting and Automated Batch Processing of Microscopic Images Using Fully Convolutional Neural Networks. SENSORS 2020; 20:s20133653. [PMID: 32610652 PMCID: PMC7374276 DOI: 10.3390/s20133653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 06/20/2020] [Accepted: 06/24/2020] [Indexed: 11/21/2022]
Abstract
In vitro cellular models are promising tools for studying normal and pathological conditions. One of their important applications is the development of genetically engineered biosensor systems to investigate, in real time, the processes occurring in living cells. At present, there are fluorescence, protein-based, sensory systems for detecting various substances in living cells (for example, hydrogen peroxide, ATP, Ca2+ etc.,) or for detecting processes such as endoplasmic reticulum stress. Such systems help to study the mechanisms underlying the pathogenic processes and diseases and to screen for potential therapeutic compounds. It is also necessary to develop new tools for the processing and analysis of obtained microimages. Here, we present our web-application CellCountCV for automation of microscopic cell images analysis, which is based on fully convolutional deep neural networks. This approach can efficiently deal with non-convex overlapping objects, that are virtually inseparable with conventional image processing methods. The cell counts predicted with CellCountCV were very close to expert estimates (the average error rate was < 4%). CellCountCV was used to analyze large series of microscopic images obtained in experimental studies and it was able to demonstrate endoplasmic reticulum stress development and to catch the dose-dependent effect of tunicamycin.
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39
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Maurel M, Obacz J, Avril T, Ding YP, Papadodima O, Treton X, Daniel F, Pilalis E, Hörberg J, Hou W, Beauchamp MC, Tourneur-Marsille J, Cazals-Hatem D, Sommerova L, Samali A, Tavernier J, Hrstka R, Dupont A, Fessart D, Delom F, Fernandez-Zapico ME, Jansen G, Eriksson LA, Thomas DY, Jerome-Majewska L, Hupp T, Chatziioannou A, Chevet E, Ogier-Denis E. Control of anterior GRadient 2 (AGR2) dimerization links endoplasmic reticulum proteostasis to inflammation. EMBO Mol Med 2020; 11:emmm.201810120. [PMID: 31040128 PMCID: PMC6554669 DOI: 10.15252/emmm.201810120] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Anterior gradient 2 (AGR2) is a dimeric protein disulfide isomerase family member involved in the regulation of protein quality control in the endoplasmic reticulum (ER). Mouse AGR2 deletion increases intestinal inflammation and promotes the development of inflammatory bowel disease (IBD). Although these biological effects are well established, the underlying molecular mechanisms of AGR2 function toward inflammation remain poorly defined. Here, using a protein-protein interaction screen to identify cellular regulators of AGR2 dimerization, we unveiled specific enhancers, including TMED2, and inhibitors of AGR2 dimerization, that control AGR2 functions. We demonstrate that modulation of AGR2 dimer formation, whether enhancing or inhibiting the process, yields pro-inflammatory phenotypes, through either autophagy-dependent processes or secretion of AGR2, respectively. We also demonstrate that in IBD and specifically in Crohn's disease, the levels of AGR2 dimerization modulators are selectively deregulated, and this correlates with severity of disease. Our study demonstrates that AGR2 dimers act as sensors of ER homeostasis which are disrupted upon ER stress and promote the secretion of AGR2 monomers. The latter might represent systemic alarm signals for pro-inflammatory responses.
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Affiliation(s)
- Marion Maurel
- INSERM U1242, "Chemistry, Oncogenesis Stress Signaling", University of Rennes, Rennes, France.,Centre de Lutte Contre le Cancer Eugène Marquis, Rennes, France.,VIB Department of Medical Protein Research, UGent, Gent, Belgium.,Apoptosis Research Centre, School of Natural Sciences, NUI Galway, Galway, Ireland
| | - Joanna Obacz
- INSERM U1242, "Chemistry, Oncogenesis Stress Signaling", University of Rennes, Rennes, France.,Centre de Lutte Contre le Cancer Eugène Marquis, Rennes, France
| | - Tony Avril
- INSERM U1242, "Chemistry, Oncogenesis Stress Signaling", University of Rennes, Rennes, France.,Centre de Lutte Contre le Cancer Eugène Marquis, Rennes, France
| | - Yong-Ping Ding
- INSERM, UMR1149, Team «Gut Inflammation», Research Centre of Inflammation, Paris, France.,Université Paris-Diderot Sorbonne Paris-Cité, Paris, France.,APHP Beaujon Hospital Clichy la Garenne, Paris, France
| | - Olga Papadodima
- Institute of Biology, Medicinal Chemistry & Biotechnology, NHRF, Athens, Greece
| | - Xavier Treton
- INSERM, UMR1149, Team «Gut Inflammation», Research Centre of Inflammation, Paris, France.,Université Paris-Diderot Sorbonne Paris-Cité, Paris, France.,APHP Beaujon Hospital Clichy la Garenne, Paris, France
| | - Fanny Daniel
- INSERM, UMR1149, Team «Gut Inflammation», Research Centre of Inflammation, Paris, France.,Université Paris-Diderot Sorbonne Paris-Cité, Paris, France.,APHP Beaujon Hospital Clichy la Garenne, Paris, France
| | - Eleftherios Pilalis
- Institute of Biology, Medicinal Chemistry & Biotechnology, NHRF, Athens, Greece.,International Centre for Cancer Vaccine Science, Gdansk, Poland
| | - Johanna Hörberg
- Department of Chemistry and Molecular Biology, University of Gothenburg, Göteborg, Sweden
| | - Wenyang Hou
- Departments of Anatomy and Cell Biology, Human Genetics, and Pediatrics, McGill University, Montreal, QC, Canada
| | - Marie-Claude Beauchamp
- Departments of Anatomy and Cell Biology, Human Genetics, and Pediatrics, McGill University, Montreal, QC, Canada
| | - Julien Tourneur-Marsille
- INSERM, UMR1149, Team «Gut Inflammation», Research Centre of Inflammation, Paris, France.,Université Paris-Diderot Sorbonne Paris-Cité, Paris, France.,APHP Beaujon Hospital Clichy la Garenne, Paris, France
| | - Dominique Cazals-Hatem
- INSERM, UMR1149, Team «Gut Inflammation», Research Centre of Inflammation, Paris, France.,Université Paris-Diderot Sorbonne Paris-Cité, Paris, France.,APHP Beaujon Hospital Clichy la Garenne, Paris, France
| | - Lucia Sommerova
- Regional Centre for Applied Molecular Oncology (RECAMO), Brno, Czech Republic
| | - Afshin Samali
- Apoptosis Research Centre, School of Natural Sciences, NUI Galway, Galway, Ireland
| | - Jan Tavernier
- VIB Department of Medical Protein Research, UGent, Gent, Belgium
| | - Roman Hrstka
- Regional Centre for Applied Molecular Oncology (RECAMO), Brno, Czech Republic
| | - Aurélien Dupont
- Microscopy Rennes Imaging Centre, and Biosit, UMS3480 CNRS, University of Rennes 1, Rennes Cédex, France
| | | | | | - Martin E Fernandez-Zapico
- Division of Oncology Research, Department of Oncology, Schulze Center for Novel Therapeutics, Mayo Clinic, Rochester, MN, USA
| | - Gregor Jansen
- Biochemistry Department, McGill University Life Sciences Complex, Montréal, QC, Canada
| | - Leif A Eriksson
- Department of Chemistry and Molecular Biology, University of Gothenburg, Göteborg, Sweden
| | - David Y Thomas
- Biochemistry Department, McGill University Life Sciences Complex, Montréal, QC, Canada
| | - Loydie Jerome-Majewska
- Departments of Anatomy and Cell Biology, Human Genetics, and Pediatrics, McGill University, Montreal, QC, Canada
| | - Ted Hupp
- International Centre for Cancer Vaccine Science, Gdansk, Poland.,Regional Centre for Applied Molecular Oncology (RECAMO), Brno, Czech Republic.,Edinburgh Cancer Research Centre at the Institute of Genetics and Molecular Medicine, Edinburgh University, Edimburgh, UK
| | - Aristotelis Chatziioannou
- Institute of Biology, Medicinal Chemistry & Biotechnology, NHRF, Athens, Greece .,e-NIOS PC, Kallithea-Athens, Greece
| | - Eric Chevet
- INSERM U1242, "Chemistry, Oncogenesis Stress Signaling", University of Rennes, Rennes, France .,Centre de Lutte Contre le Cancer Eugène Marquis, Rennes, France
| | - Eric Ogier-Denis
- INSERM, UMR1149, Team «Gut Inflammation», Research Centre of Inflammation, Paris, France .,Université Paris-Diderot Sorbonne Paris-Cité, Paris, France.,APHP Beaujon Hospital Clichy la Garenne, Paris, France
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40
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Šereš M, Pavlíková L, Boháčová V, Kyca T, Borovská I, Lakatoš B, Breier A, Sulová Z. Overexpression of GRP78/BiP in P-Glycoprotein-Positive L1210 Cells is Responsible for Altered Response of Cells to Tunicamycin as a Stressor of the Endoplasmic Reticulum. Cells 2020; 9:cells9040890. [PMID: 32268491 PMCID: PMC7226765 DOI: 10.3390/cells9040890] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 03/25/2020] [Accepted: 03/31/2020] [Indexed: 12/12/2022] Open
Abstract
P-glycoprotein (P-gp, ABCB1 member of the ABC (ATP-binding cassette) transporter family) localized in leukemia cell plasma membranes is known to reduce cell sensitivity to a large but well-defined group of chemicals known as P-gp substrates. However, we found previously that P-gp-positive sublines of L1210 murine leukemia cells (R and T) but not parental P-gp-negative parental cells (S) are resistant to the endoplasmic reticulum (ER) stressor tunicamycin (an N-glycosylation inhibitor). Here, we elucidated the mechanism of tunicamycin resistance in P-gp-positive cells. We found that tunicamycin at a sublethal concentration of 0.1 µM induced retention of the cells in the G1 phase of the cell cycle only in the P-gp negative variant of L1210 cells. P-gp-positive L1210 cell variants had higher expression of the ER stress chaperone GRP78/BiP compared to that of P-gp-negative cells, in which tunicamycin induced larger upregulation of CHOP (C/EBP homologous protein). Transfection of the sensitive P-gp-negative cells with plasmids containing GRP78/BiP antagonized tunicamycin-induced CHOP expression and reduced tunicamycin-induced arrest of cells in the G1 phase of the cell cycle. Taken together, these data suggest that the resistance of P-gp-positive cells to tunicamycin is due to increased levels of GRP78/BiP, which is overexpressed in both resistant variants of L1210 cells.
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Affiliation(s)
- Mário Šereš
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia; (L.P.); (V.B.); (T.K.); (I.B.)
- Correspondence: (M.Š.); (A.B.); (Z.S.); Tel.: +421-2-322-95-574 (M.Š.); +421-2-593-25-514 (A.B.); +421-2-322-95-510 (Z.S.)
| | - Lucia Pavlíková
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia; (L.P.); (V.B.); (T.K.); (I.B.)
| | - Viera Boháčová
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia; (L.P.); (V.B.); (T.K.); (I.B.)
| | - Tomáš Kyca
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia; (L.P.); (V.B.); (T.K.); (I.B.)
| | - Ivana Borovská
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia; (L.P.); (V.B.); (T.K.); (I.B.)
| | - Boris Lakatoš
- Institute of Biochemistry and Microbiology, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovakia;
| | - Albert Breier
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia; (L.P.); (V.B.); (T.K.); (I.B.)
- Institute of Biochemistry and Microbiology, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovakia;
- Correspondence: (M.Š.); (A.B.); (Z.S.); Tel.: +421-2-322-95-574 (M.Š.); +421-2-593-25-514 (A.B.); +421-2-322-95-510 (Z.S.)
| | - Zdena Sulová
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia; (L.P.); (V.B.); (T.K.); (I.B.)
- Correspondence: (M.Š.); (A.B.); (Z.S.); Tel.: +421-2-322-95-574 (M.Š.); +421-2-593-25-514 (A.B.); +421-2-322-95-510 (Z.S.)
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41
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Zhao G, Sun H, Zhang T, Liu JX. Copper induce zebrafish retinal developmental defects via triggering stresses and apoptosis. Cell Commun Signal 2020; 18:45. [PMID: 32169084 PMCID: PMC7071659 DOI: 10.1186/s12964-020-00548-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 03/06/2020] [Indexed: 02/07/2023] Open
Abstract
Background The disorder of copper homeostasis is linked with disease and developmental defects, and excess copper_nanoparticles (CuNPs) and ion (Cu2+) will induce developmental malformation and disease in organisms. However, little knowledge is available regarding its potential regulation mechanisms, and little study links excess copper with retinal developmental malformation and disease. Methods Embryos were stressed with copper (CuNPs and Cu2+), and cell proliferation and apoptosis assays, reactive oxygen species (ROS) and endoplasmic reticulum (ER) signaling detections, and genetic mutants cox17−/− and atp7a−/− application, were used to evaluate copper induced retinal developmental malformation and the underlying genetic and biological regulating mechanisms. Results Copper reduced retinal cells and down-regulated expression of retinal genes, damaged the structures of ER and mitochondria in retinal cells, up-regulated unfold protein responses (UPR) and ROS, and increased apoptosis in copper-stressed retinal cells. The copper induced retinal defects could be significantly neutralized by ROS scavengers reduced Glutathione (GSH) & N-acetylcysteine (NAC) and ER stress inhibitor 4- phenylbutyric acid (PBA). Blocking the transportation of copper to mitochondria, or to trans-Golgi network and to be exported into plasma, by deleting gene cox17 or atp7a, could alleviate retinal developmental defects in embryos under copper stresses. Conclusions This is probably the first report to reveal that copper nanoparticles and ions induce retinal developmental defects via upregulating UPR and ROS, leading to apoptosis in zebrafish embryonic retinal cells. Integrated function of copper transporter (Cox17 and Atp7a) is necessary for copper induced retinal defects. Graphical abstract ![]()
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Affiliation(s)
- Guang Zhao
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, China
| | - HaoJie Sun
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, China
| | - Ting Zhang
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, China
| | - Jing-Xia Liu
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, China.
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Endoplasmic reticulum stress links psoriasis vulgaris with keratinocyte inflammation. Postepy Dermatol Alergol 2020; 37:34-40. [PMID: 32467681 PMCID: PMC7247056 DOI: 10.5114/ada.2020.93382] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 08/02/2018] [Indexed: 01/26/2023] Open
Abstract
Introduction Endoplasmic reticulum stress (ERS) has been implicated in the pathogenesis of various inflammatory diseases. However, the role of ERS in psoriasis is still unclear. Aim To examine ERS in psoriasis keratinocytes and to assess the association of ERS with skin inflammation response. Material and methods We investigated ERS in keratinocytes of normal skin, lesional and perilesional psoriasis vulgaris (PV) skin tissues using transmission electron microscope (TEM) examination, Western blot and immunostaining analysis. Results By TEM examination, we found that endoplasmic reticulum (ER) in psoriatic keratinocytes was ultrastructurally abnormal, with changes in ER morphology and the ER expansion. Using Western blot and immunostaining analysis, we showed that the expression of ERS-associated proteins, such as BiP, CHOP and XBP1, was enhanced in PV epidermis compared to the healthy skin. Moreover, abundant TNF-α protein was correlated to the increased BiP, CHOP and XBP1 expression in PV epidermis. Conclusions Our findings demonstrate that PV keratinocytes have an increased ERS, which may contribute to the pathogenesis of PV.
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Decoupling of Apoptosis from Activation of the ER Stress Response by the Drosophila Metallopeptidase superdeath. Genetics 2020; 214:913-925. [PMID: 32047096 DOI: 10.1534/genetics.119.303004] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 02/09/2020] [Indexed: 12/19/2022] Open
Abstract
Endoplasmic reticulum (ER) stress-induced apoptosis is a primary cause and modifier of degeneration in a number of genetic disorders. Understanding how genetic variation influences the ER stress response and subsequent activation of apoptosis could improve individualized therapies and predictions of outcomes for patients. In this study, we find that the uncharacterized, membrane-bound metallopeptidase CG14516 in Drosophila melanogaster, which we rename as SUPpressor of ER stress-induced DEATH (su per death), plays a role in modifying ER stress-induced apoptosis. We demonstrate that loss of su per death reduces apoptosis and degeneration in the Rh1G69D model of ER stress through the JNK signaling cascade. This effect on apoptosis occurs without altering the activation of the unfolded protein response (IRE1 and PERK), suggesting that the beneficial prosurvival effects of this response are intact. Furthermore, we show that su per death functions epistatically upstream of CDK5-a known JNK-activated proapoptotic factor in this model of ER stress. We demonstrate that su per death is not only a modifier of this particular model, but affects the general tolerance to ER stress, including ER stress-induced apoptosis. Finally, we present evidence of Superdeath localization to the ER membrane. While similar in sequence to a number of human metallopeptidases found in the plasma membrane and ER membrane, its localization suggests that su per death is orthologous to ERAP1/2 in humans. Together, this study provides evidence that su per death is a link between stress in the ER and activation of cytosolic apoptotic pathways.
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Mariángelo JIE, Román B, Silvestri MA, Salas M, Vittone L, Said M, Mundiña‐Weilenmann C. Chemical chaperones improve the functional recovery of stunned myocardium by attenuating the endoplasmic reticulum stress. Acta Physiol (Oxf) 2020; 228:e13358. [PMID: 31385408 DOI: 10.1111/apha.13358] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 07/30/2019] [Accepted: 07/31/2019] [Indexed: 12/26/2022]
Abstract
AIM Myocardial ischaemia/reperfusion (I/R) produces structural and functional alterations depending on the duration of ischaemia. Brief ischaemia followed by reperfusion causes reversible contractile dysfunction (stunned heart) but long-lasting ischaemia followed by reperfusion can result in irreversible injury with cell death. Events during I/R can alter endoplasmic reticulum (ER) function leading to the accumulation of unfolded/misfolded proteins. The resulting ER stress induces activation of several signal transduction pathways, known as unfolded protein response (UPR). Experimental evidence shows that UPR contributes to cell death in irreversible I/R injury; however, there is still uncertainty for its occurrence in the stunned myocardium. This study investigated the ER stress response and its functional impact on the post-ischaemic cardiac performance of the stunned heart. METHODS Perfused rat hearts were subjected to 20 minutes of ischaemia followed by 30 minutes of reperfusion. UPR markers were evaluated by qRT-PCR and western blot. Post-ischaemic mechanical recovery was measured in absence and presence of two chemical chaperones: tauroursodeoxycholic acid (TUDCA) and 4-phenylbutyric acid (4-PBA). RESULTS Analysis of mRNA and protein levels of various ER stress effectors demonstrated that different UPR signalling cascades, involving both pro-survival and pro-apoptotic pathways, are activated. Inhibition of the UPR with chemical chaperones improved the post-ischaemic recovery of cardiac mechanical function without affecting the I/R-induced increase in oxidative stress. CONCLUSION Our results suggest that prevention of ER stress by chemical chaperones could be a therapeutic tool to limit deterioration of the contractile function in clinical settings in which the phenomenon of myocardial stunning is present.
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Affiliation(s)
- Juan Ignacio Elio Mariángelo
- Centro de Investigaciones Cardiovasculares, CCT‐CONICET La Plata, Facultad de Ciencias Médicas Universidad Nacional de La Plata La Plata Argentina
| | - Bárbara Román
- Centro de Investigaciones Cardiovasculares, CCT‐CONICET La Plata, Facultad de Ciencias Médicas Universidad Nacional de La Plata La Plata Argentina
| | - María Agustina Silvestri
- Centro de Investigaciones Cardiovasculares, CCT‐CONICET La Plata, Facultad de Ciencias Médicas Universidad Nacional de La Plata La Plata Argentina
| | - Margarita Salas
- Centro de Investigaciones Cardiovasculares, CCT‐CONICET La Plata, Facultad de Ciencias Médicas Universidad Nacional de La Plata La Plata Argentina
| | - Leticia Vittone
- Centro de Investigaciones Cardiovasculares, CCT‐CONICET La Plata, Facultad de Ciencias Médicas Universidad Nacional de La Plata La Plata Argentina
| | - Matilde Said
- Centro de Investigaciones Cardiovasculares, CCT‐CONICET La Plata, Facultad de Ciencias Médicas Universidad Nacional de La Plata La Plata Argentina
| | - Cecilia Mundiña‐Weilenmann
- Centro de Investigaciones Cardiovasculares, CCT‐CONICET La Plata, Facultad de Ciencias Médicas Universidad Nacional de La Plata La Plata Argentina
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Clark EM, Nonarath HJT, Bostrom JR, Link BA. Establishment and validation of an endoplasmic reticulum stress reporter to monitor zebrafish ATF6 activity in development and disease. Dis Model Mech 2020; 13:dmm.041426. [PMID: 31852729 PMCID: PMC6994954 DOI: 10.1242/dmm.041426] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 12/12/2019] [Indexed: 12/19/2022] Open
Abstract
Induction of endoplasmic reticulum (ER) stress is associated with diverse developmental and degenerative diseases. Modified ER homeostasis causes activation of conserved stress pathways at the ER called the unfolded protein response (UPR). ATF6 is a transcription factor activated during ER stress as part of a coordinated UPR. ATF6 resides at the ER and, upon activation, is transported to the Golgi apparatus, where it is cleaved by proteases to create an amino-terminal cytoplasmic fragment (ATF6f). ATF6f translocates to the nucleus to activate transcriptional targets. Here, we describe the establishment and validation of zebrafish reporter lines for ATF6 activity. These transgenic lines are based on a defined and multimerized ATF6 consensus site, which drives either eGFP or destabilized eGFP, enabling dynamic study of ATF6 activity during development and disease. The results show that the reporter is specific for the ATF6 pathway, active during development and induced in disease models known to engage UPR. Specifically, during development, ATF6 activity is highest in the lens, skeletal muscle, fins and gills. The reporter is also activated by common chemical inducers of ER stress, including tunicamycin, thapsigargin and brefeldin A, as well as by heat shock. In models for amyotrophic lateral sclerosis and cone dystrophy, ATF6 reporter expression is induced in spinal cord interneurons or photoreceptors, respectively, suggesting a role for ATF6 response in multiple neurodegenerative diseases. Collectively our results show that these ATF6 reporters can be used to monitor ATF6 activity changes throughout development and in zebrafish models of disease. This article has an associated First Person interview with the first author of the paper. Summary: In this study, we validate transgenic zebrafish generated to specifically report the activity of ATF6, representing a major branch of the endoplasmic reticulum stress pathway with functions in development and disease.
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Affiliation(s)
- Eric M Clark
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, WI 53214, USA
| | - Hannah J T Nonarath
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, WI 53214, USA
| | - Jonathan R Bostrom
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, WI 53214, USA
| | - Brian A Link
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, WI 53214, USA
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Hepatic neddylation targets and stabilizes electron transfer flavoproteins to facilitate fatty acid β-oxidation. Proc Natl Acad Sci U S A 2020; 117:2473-2483. [PMID: 31941714 DOI: 10.1073/pnas.1910765117] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Neddylation is a ubiquitination-like pathway that controls cell survival and proliferation by covalently conjugating NEDD8 to lysines in specific substrate proteins. However, the physiological role of neddylation in mammalian metabolism remains elusive, and no mitochondrial targets have been identified. Here, we report that mouse models with liver-specific deficiency of NEDD8 or ubiquitin-like modifier activating enzyme 3 (UBA3), the catalytic subunit of the NEDD8-activating enzyme, exhibit neonatal death with spontaneous fatty liver as well as hepatic cellular senescence. In particular, liver-specific UBA3 deficiency leads to systemic abnormalities similar to glutaric aciduria type II (GA-II), a rare autosomal recessive inherited fatty acid oxidation disorder resulting from defects in mitochondrial electron transfer flavoproteins (ETFs: ETFA and ETFB) or the corresponding ubiquinone oxidoreductase. Neddylation inhibition by various strategies results in decreased protein levels of ETFs in neonatal livers and embryonic hepatocytes. Hepatic neddylation also enhances ETF expression in adult mice and prevents fasting-induced steatosis and mortality. Interestingly, neddylation is active in hepatic mitochondria. ETFs are neddylation substrates, and neddylation stabilizes ETFs by inhibiting their ubiquitination and degradation. Moreover, certain mutations of ETFs found in GA-II patients hinder the neddylation of these substrates. Taken together, our results reveal substrates for neddylation and add insight into GA-II.
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Yap J, Chen X, Delmotte P, Sieck GC. TNFα selectively activates the IRE1α/XBP1 endoplasmic reticulum stress pathway in human airway smooth muscle cells. Am J Physiol Lung Cell Mol Physiol 2020; 318:L483-L493. [PMID: 31940218 DOI: 10.1152/ajplung.00212.2019] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Airway inflammation is a key aspect of diseases such as asthma. Proinflammatory cytokines such as TNFα mediate the inflammatory response. In various diseases, inflammation leads to endoplasmic reticulum (ER) stress, the accumulation of unfolded proteins, which triggers homeostatic responses to restore normal cellular function. We hypothesized that TNFα triggers ER stress through an increase in reactive oxygen species generation in human airway smooth muscle (hASM) with a downstream effect on mitofusin 2 (Mfn2). In hASM cells isolated from lung specimens incidental to patient surgery, dose- and time-dependent effects of TNFα exposure were assessed. Exposure of hASM to tunicamycin was used as a positive control. Tempol (500 μM) was used as superoxide scavenger. Activation of three ER stress pathways were evaluated by Western blotting: 1) autophosphorylation of inositol-requiring enzyme1 (IRE1α) leading to splicing of X-box binding protein 1 (XBP1); 2) autophosphorylation of protein kinase RNA-like endoplasmic reticulum kinase (PERK) leading to phosphorylation of eukaryotic initiation factor 2α; and 3) translocation and cleavage of activating transcription factor 6 (ATF6). We found that exposure of hASM cells to tunicamycin activated all three ER stress pathways. In contrast, TNFα selectively activated the IRE1α/XBP1 pathway in a dose- and time-dependent fashion. Our results indicate that TNFα does not activate the PERK and ATF6 pathways. Exposure of hASM cells to TNFα also decreased Mfn2 protein expression. Concurrent exposure to TNFα and tempol reversed the effect of TNFα on IRE1α phosphorylation and Mfn2 protein expression. Selective activation of the IRE1α/XBP1 pathway in hASM cells after exposure to TNFα may reflect a unique homeostatic role of this pathway in the inflammatory response of hASM cells.
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Affiliation(s)
- John Yap
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota
| | - Xujiao Chen
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota
| | - Philippe Delmotte
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota
| | - Gary C Sieck
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota
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Ye L, Mueller O, Bagwell J, Bagnat M, Liddle RA, Rawls JF. High fat diet induces microbiota-dependent silencing of enteroendocrine cells. eLife 2019; 8:48479. [PMID: 31793875 PMCID: PMC6937151 DOI: 10.7554/elife.48479] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 11/26/2019] [Indexed: 12/18/2022] Open
Abstract
Enteroendocrine cells (EECs) are specialized sensory cells in the intestinal epithelium that sense and transduce nutrient information. Consumption of dietary fat contributes to metabolic disorders, but EEC adaptations to high fat feeding were unknown. Here, we established a new experimental system to directly investigate EEC activity in vivo using a zebrafish reporter of EEC calcium signaling. Our results reveal that high fat feeding alters EEC morphology and converts them into a nutrient insensitive state that is coupled to endoplasmic reticulum (ER) stress. We called this novel adaptation 'EEC silencing'. Gnotobiotic studies revealed that germ-free zebrafish are resistant to high fat diet induced EEC silencing. High fat feeding altered gut microbiota composition including enrichment of Acinetobacter bacteria, and we identified an Acinetobacter strain sufficient to induce EEC silencing. These results establish a new mechanism by which dietary fat and gut microbiota modulate EEC nutrient sensing and signaling.
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Affiliation(s)
- Lihua Ye
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, United States.,Division of Gastroenterology, Department of Medicine, Duke University School of Medicine, Durham, United States
| | - Olaf Mueller
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, United States
| | - Jennifer Bagwell
- Department of Cell Biology, Duke University School of Medicine, Durham, United States
| | - Michel Bagnat
- Department of Cell Biology, Duke University School of Medicine, Durham, United States
| | - Rodger A Liddle
- Division of Gastroenterology, Department of Medicine, Duke University School of Medicine, Durham, United States
| | - John F Rawls
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, United States.,Division of Gastroenterology, Department of Medicine, Duke University School of Medicine, Durham, United States
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Genetic Susceptibility to Hepatic Sinusoidal Obstruction Syndrome in Pediatric Patients Undergoing Hematopoietic Stem Cell Transplantation. Biol Blood Marrow Transplant 2019; 26:920-927. [PMID: 31790828 DOI: 10.1016/j.bbmt.2019.11.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 10/29/2019] [Accepted: 11/22/2019] [Indexed: 12/13/2022]
Abstract
Sinusoidal obstruction syndrome (SOS) is a well-recognized and potentially life-threatening complication of hematopoietic stem cell transplantation (HSCT). SOS arises from endothelial cell damage and hepatocellular injury mostly due to the transplantation conditioning regimens but also to other patient, disease, and treatment-related factors. Understanding risk factors associated with the development of SOS is critical for early initiation of treatment or prophylaxis. The knowledge about genetic contribution is limited; few studies investigated so far selected a set of genes. To get more comprehensive insight in the genetic component, we performed an exome-wide association study using genetic variants derived from whole-exome sequencing. The analyses were performed in a discovery cohort composed of 87 pediatric patients undergoing HSCT following a busulfan-containing conditioning regimen. Eight lead single-nucleotide polymorphisms (SNPs) were identified after correction for multiple testing and subsequently analyzed in a validation cohort (n = 182). Three SNPs were successfully replicated, including rs17146905 (P = .001), rs16931326 (P = .04), and rs2289971 (P = .03), located respectively in the UGT2B10, BHLHE22, and KIAA1715 genes. UGT2B10 and KIAA1715 were retained in a multivariable model while controlling for nongenetic covariates and previously identified risk variants in the GSTA1 promoter. The modulation of associations by conditioning regimens was noted; KIAA1715 was dependent on the intensity of the conditioning regimen, whereas the effect of UGT2B10 was equally applicable to all of them. Combined effect of associated loci was also observed (P = .00006) with a genotype-related SOS risk of 9.8. To our knowledge, this is the first study addressing the genetic component of SOS at an exome-wide level and identifying novel genetic variations conferring a higher risk of SOS, which might be useful for personalized prevention and treatment strategies.
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Zhao Y, Shi L, Hu C, Sang S. Wheat Bran for Colon Cancer Prevention: The Synergy between Phytochemical Alkylresorcinol C21 and Intestinal Microbial Metabolite Butyrate. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:12761-12769. [PMID: 31675233 DOI: 10.1021/acs.jafc.9b05666] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
There is convincing evidence that consuming whole grains (WGs) may decrease the risk of colorectal cancer (CRC). Wheat bran (WB) is a rich source of dietary fiber and phytochemicals with health-promoting properties. However, the active components especially the interaction between different components in WG wheat have not been fully explored. Here, we investigated whether one of the major WB phytochemicals, alkylresorcinol (AR) C21, and the major active intestinal microbial metabolite of fiber, butyrate, could synergistically suppress human colon cancer cells. Our results demonstrated for the first time that the combination of C21 and butyrate synergistically inhibited the growth of human colon cancer cells and induced apoptosis. Further mechanistic studies demonstrated that the cotreatment of C21 and butyrate induced significant up-regulations in cleaved Poly(ADP-ribose) polymerase (PARP), cleaved caspase 3, p53 upregulated modulator of apoptosis (PUMA), cytochrome C, lipid-conjugated membrane-bound form of microtubule-associated protein 1A/1B-light chain 3 (LC3-II), and C/EBP homologous protein (CHOP) expressions, indicating the synergistic anticancer effects of C21 and butyrate were associated with induction of apoptosis, autophagy, and ER stress pathways. Notably, the C21 concentrations in the large intestinal tract of mice treated with human relevant doses of C21, were from 0.86 to 1.78 μmol/g, suggesting the C21 doses used in vitro may be achievable after daily WG wheat intake. These results provide novel insights into the dietary prevention of CRC regarding the potential interaction of bioactive WG wheat phytochemicals and the microbial metabolites of fiber.
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Affiliation(s)
- Yantao Zhao
- Laboratory for Functional Foods and Human Health, Center for Excellence in Post-Harvest Technologies , North Carolina Agricultural and Technical State University, North Carolina Research Campus , 500 Laureate Way , Kannapolis , North Carolina 28081 , United States
| | - Lei Shi
- Laboratory for Functional Foods and Human Health, Center for Excellence in Post-Harvest Technologies , North Carolina Agricultural and Technical State University, North Carolina Research Campus , 500 Laureate Way , Kannapolis , North Carolina 28081 , United States
- Department of Colorectal Surgery , General Hospital of Ningxia Medical University , Yinchuan 750004 , P. R. China
| | - Changling Hu
- Laboratory for Functional Foods and Human Health, Center for Excellence in Post-Harvest Technologies , North Carolina Agricultural and Technical State University, North Carolina Research Campus , 500 Laureate Way , Kannapolis , North Carolina 28081 , United States
| | - Shengmin Sang
- Laboratory for Functional Foods and Human Health, Center for Excellence in Post-Harvest Technologies , North Carolina Agricultural and Technical State University, North Carolina Research Campus , 500 Laureate Way , Kannapolis , North Carolina 28081 , United States
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