1
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Rybarski M, Mrohs D, Osenberg K, Hemmersbach M, Pfeffel K, Steinkamp J, Schmidt D, Violou K, Schäning R, Schmidtke K, Bader V, Andriske M, Bohne P, Mark MD, Winklhofer KF, Lübbert H, Zhu XR. Loss of parkin causes endoplasmic reticulum calcium dyshomeostasis by upregulation of reticulocalbin 1. Eur J Neurosci 2023; 57:739-761. [PMID: 36656174 DOI: 10.1111/ejn.15917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 01/10/2023] [Accepted: 01/14/2023] [Indexed: 01/20/2023]
Abstract
Increasing evidence suggests that astrocytes play an important role in the progression of Parkinson's disease (PD). Previous studies on our parkin knockout mouse demonstrated a higher accumulation of damaged mitochondria in astrocytes than in surrounding dopaminergic (DA) neurons, suggesting that Parkin plays a crucial role regarding their interaction during PD pathogenesis. In the current study, we examined primary mesencephalic astrocytes and neurons in a direct co-culture system and discovered that the parkin deletion causes an impaired differentiation of mesencephalic neurons. This effect required the parkin mutation in astrocytes as well as in neurons. In Valinomycin-treated parkin-deficient astrocytes, ubiquitination of Mitofusin 2 was abolished, whereas there was no significant degradation of the outer mitochondrial membrane protein Tom70. This result may explain the accumulation of damaged mitochondria in parkin-deficient astrocytes. We examined differential gene expression in the substantia nigra region of our parkin-KO mouse by RNA sequencing and identified an upregulation of the endoplasmic reticulum (ER) Ca2+ -binding protein reticulocalbin 1 (RCN1) expression, which was validated using qPCR. Immunostaining of the SN brain region revealed RCN1 expression mainly in astrocytes. Our subcellular fractionation of brain extract has shown that RCN1 is located in the ER and in mitochondria-associated membranes (MAM). Moreover, a loss of Parkin function reduced ATP-stimulated calcium-release in ER mesencephalic astrocytes that could be attenuated by siRNA-mediated RCN1 knockdown. Our results indicate that RCN1 plays an important role in ER-associated calcium dyshomeostasis caused by the loss of Parkin function in mesencephalic astrocytes, thereby highlighting the relevance of astrocyte function in PD pathomechanisms.
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Affiliation(s)
- Max Rybarski
- Department of Animal Physiology, Ruhr University Bochum, Bochum, Germany.,Department of Behavioral Neuroscience, Ruh University Bochum, Bochum, Germany
| | - David Mrohs
- Department of Animal Physiology, Ruhr University Bochum, Bochum, Germany
| | - Katharina Osenberg
- Department of Animal Physiology, Ruhr University Bochum, Bochum, Germany.,Biofrontera Pharmaceuticals AG, Leverkusen, Germany
| | - Maren Hemmersbach
- Department of Animal Physiology, Ruhr University Bochum, Bochum, Germany
| | - Katharina Pfeffel
- Department of Animal Physiology, Ruhr University Bochum, Bochum, Germany
| | - Joy Steinkamp
- Department of Animal Physiology, Ruhr University Bochum, Bochum, Germany
| | - David Schmidt
- Department of Animal Physiology, Ruhr University Bochum, Bochum, Germany
| | - Karina Violou
- Department of Animal Physiology, Ruhr University Bochum, Bochum, Germany
| | - Ruth Schäning
- Department of Animal Physiology, Ruhr University Bochum, Bochum, Germany
| | - Katja Schmidtke
- Department of Animal Physiology, Ruhr University Bochum, Bochum, Germany.,Department of Behavioral Neuroscience, Ruh University Bochum, Bochum, Germany
| | - Verian Bader
- Department of Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, Bochum, Germany
| | - Michael Andriske
- Department of Animal Physiology, Ruhr University Bochum, Bochum, Germany
| | - Pauline Bohne
- Department of Behavioral Neuroscience, Ruh University Bochum, Bochum, Germany
| | - Melanie D Mark
- Department of Behavioral Neuroscience, Ruh University Bochum, Bochum, Germany
| | - Konstanze F Winklhofer
- Department of Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, Bochum, Germany
| | - Hermann Lübbert
- Department of Animal Physiology, Ruhr University Bochum, Bochum, Germany.,Biofrontera Pharmaceuticals AG, Leverkusen, Germany
| | - Xin-Ran Zhu
- Department of Animal Physiology, Ruhr University Bochum, Bochum, Germany.,Department of Behavioral Neuroscience, Ruh University Bochum, Bochum, Germany
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2
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Azad AK, Sheikh AM, Haque MA, Osago H, Sakai H, Shibly AZ, Yano S, Michikawa M, Hossain S, Tabassum S, A. G, Zhou X, Zhang Y, Nagai A. Time-Dependent Analysis of Plasmalogens in the Hippocampus of an Alzheimer's Disease Mouse Model: A Role of Ethanolamine Plasmalogen. Brain Sci 2021; 11:1603. [PMID: 34942905 PMCID: PMC8699479 DOI: 10.3390/brainsci11121603] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/23/2021] [Accepted: 11/29/2021] [Indexed: 12/26/2022] Open
Abstract
Plasmalogens are alkenyl-acyl glycerophospholipids and decreased in post-mortem Alzheimer's disease (AD) brains. The aim of this study is to investigate the time-dependent changes of plasmalogens in the hippocampus of an AD model mouse (J20). Plasmalogen levels at 3, 6, 9, 12 and 15 months were analyzed by liquid-chromatography-targeted-multiplexed-selected-reaction-monitoring-tandem-mass-spectrometry (LC-SRM/MS). Reactive oxygen species (ROS) levels were evaluated using dichlorofluorescein diacetate (DCF-DA). Plasmalogen synthesizing enzyme glycerone-phosphate O-acyltransferase (GNPAT) and late endosome marker Rab7 levels were quantified by Western blotting. GNPAT localization, changes of neuronal and glial cell numbers were evaluated by immunostaining. Compared to wild-type mice (WT), total plasmalogen-ethanolamine, but not plasmalogen-choline levels, were increased at 9 months and subsequently decreased at 15 months in J20 mice. A principal component analysis of plasmalogen-ethanolamine species could separate WT and J20 mice both at 9 and 15 months. Both GNPAT and Rab7 protein were increased in J20 mice at 9 months, whereas GNPAT was decreased at 15 months. ROS levels were increased in J20 mice except for 9 months. Our results suggest that increased plasmalogen-ethanolamine could counteract ROS levels and contribute to the phagocytosis process in J20 mice at 9 months. Such results might indicate a transient protective response of plasmalogen-ethanolamine in AD conditions.
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Affiliation(s)
- Abul Kalam Azad
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.K.A.); (A.Z.S.); (G.A.); (X.Z.); (Y.Z.)
- Department of Microbiology, Jagannath University, Dhaka 1100, Bangladesh
| | - Abdullah Md. Sheikh
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.M.S.); (M.A.H.); (S.Y.); (S.T.)
| | - Md. Ahsanul Haque
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.M.S.); (M.A.H.); (S.Y.); (S.T.)
- Department of Pharmacy, University of Asia Pacific, Dhaka 1205, Bangladesh
| | - Harumi Osago
- Department of Biochemistry, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan;
| | - Hiromichi Sakai
- Department of Biosignaling and Radioisotope Experiment, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan;
| | - Abu Zaffar Shibly
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.K.A.); (A.Z.S.); (G.A.); (X.Z.); (Y.Z.)
- Department of Biotechnology and Genetic Engineering, Mawlana Bhashani Science and Technology University, Tangail 1902, Bangladesh
| | - Shozo Yano
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.M.S.); (M.A.H.); (S.Y.); (S.T.)
| | - Makoto Michikawa
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan;
| | - Shahdat Hossain
- Department of Biochemistry and Molecular Biology, Jahangirnagar University, Dhaka 1342, Bangladesh;
| | - Shatera Tabassum
- Department of Laboratory Medicine, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.M.S.); (M.A.H.); (S.Y.); (S.T.)
| | - Garu A.
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.K.A.); (A.Z.S.); (G.A.); (X.Z.); (Y.Z.)
| | - Xiaojing Zhou
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.K.A.); (A.Z.S.); (G.A.); (X.Z.); (Y.Z.)
| | - Yuchi Zhang
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.K.A.); (A.Z.S.); (G.A.); (X.Z.); (Y.Z.)
| | - Atsushi Nagai
- Department of Neurology, Faculty of Medicine, Shimane University, Izumo 693-8501, Japan; (A.K.A.); (A.Z.S.); (G.A.); (X.Z.); (Y.Z.)
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3
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Lu W, Chen H, Liang B, Ou C, Zhang M, Yue Q, Xie J. Integrative Analyses and Verification of the Expression and Prognostic Significance for RCN1 in Glioblastoma Multiforme. Front Mol Biosci 2021; 8:736947. [PMID: 34722631 PMCID: PMC8548715 DOI: 10.3389/fmolb.2021.736947] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 09/28/2021] [Indexed: 11/30/2022] Open
Abstract
Glioblastoma multiform is a lethal primary brain tumor derived from astrocytic, with a poor prognosis in adults. Reticulocalbin-1 (RCN1) is a calcium-binding protein, dysregulation of which contributes to tumorigenesis and progression in various cancers. The present study aimed to identify the impact of RCN1 on the outcomes of patients with Glioblastoma multiforme (GBM). The study applied two public databases to require RNA sequencing data of Glioblastoma multiform samples with clinical data for the construction of a training set and a validation set, respectively. We used bioinformatic analyses to determine that RCN1 could be an independent factor for the overall survival of Glioblastoma multiform patients. In the training set, the study constructed a predictive prognostic model based on the combination of RCN1 with various clinical parameters for overall survival at 0.5-, 1.0-, and 1.5-years, as well as developed a nomogram, which was further validated by validation set. Pathways analyses indicated that RCN1 was involved in KEAS and MYC pathways and apoptosis. In vitro experiments indicated that RCN1 promoted cell invasion of Glioblastoma multiform cells. These results illustrated the prognostic role of RCN1 for overall survival in Glioblastoma multiform patients, indicated the promotion of RCN1 in cell invasion, and suggested the probability of RCN1 as a potential targeted molecule for treatment in Glioblastoma multiform.
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Affiliation(s)
- Weicheng Lu
- State Key Laboratory of Oncology in Southern China, Department of Anesthesiology, Sun Yat-sen University Cancer Center, Collaborative Innovation for Cancer Medicine, Guangzhou, China
| | - Hong Chen
- Department of Gastrointestinal Surgery, Fujian Provincial Hospital, Fuzhou, China
| | - Bo Liang
- Nanjing University of Chinese Medicine, Nanjing, China
| | - Chaopeng Ou
- State Key Laboratory of Oncology in Southern China, Department of Anesthesiology, Sun Yat-sen University Cancer Center, Collaborative Innovation for Cancer Medicine, Guangzhou, China
| | - Mingwei Zhang
- Department of Radiation Oncology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - Qiuyuan Yue
- Department of Radiology, Fujian Cancer Hospital and Fujian Medical University Cancer Hospital, Fuzhou, China
| | - Jingdun Xie
- State Key Laboratory of Oncology in Southern China, Department of Anesthesiology, Sun Yat-sen University Cancer Center, Collaborative Innovation for Cancer Medicine, Guangzhou, China
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4
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Huang ZH, Qiao J, Feng YY, Qiu MT, Cheng T, Wang J, Zheng CF, Lv ZQ, Wang CH. Reticulocalbin-1 knockdown increases the sensitivity of cells to Adriamycin in nasopharyngeal carcinoma and promotes endoplasmic reticulum stress-induced cell apoptosis. Cell Cycle 2020; 19:1576-1589. [PMID: 32436770 PMCID: PMC7469451 DOI: 10.1080/15384101.2020.1733750] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 10/09/2019] [Accepted: 11/13/2019] [Indexed: 01/29/2023] Open
Abstract
Nasopharyngeal carcinoma (NPC) mainly appears in southeastern Asian countries, including China. Adriamycin (ADM), a type of antitumor drug, is widely applied in treatments against various cancers. Nevertheless, cancer cells will eventually develop drug resistance to ADM. The present study aims to explore the potential role of reticulocalbin-1 (RCN1) in NPC cells resistance to ADM. Microarray-based analysis was used to screen NPC-related genes, with RCN1 acquired for this current study. RCN1 expression in NPC tissues and cells was determined. The biological function of RCN1 on NPC cell apoptosis was evaluated via gain- and loss-of-function experiments in 5-8 F/ADM and 5-8 F cells by delivering si-RCN1 and RCN1-vector. The function of endoplasmic reticulum (ER) stress on cell apoptosis was measured with the involvement of the PERK-CHOP signaling pathway. Furthermore, tumor formation in nude mice was performed to evaluate the survival condition and RCN1 effects in vivo. RCN1 was highly expressed in NPC tissues and cell lines. The increased expression of ER-related proteins ATF4, CHOP, and the extents of IRE1 and PERK phosphorylation were observed. RCN1 knockdown was found to reduce resistance of NPC cells/tissues to ADM while activating ER stress through the activated PERK-CHOP signaling pathway, which further promoted NPC cell apoptosis. These in vitro findings were detected in vivo on tumor formation in nude mice. In conclusion, the present study provides evidence that RCN1 knockdown stimulates ADM sensitivity in NPC by promoting ER stress-induced cell apoptosis, highlighting a theoretical basis for NPC treatment.
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Affiliation(s)
- Ze-Hao Huang
- Department of Head & Neck Surgery, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, P.R. China
| | - Jun Qiao
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, P.R. China
| | | | - Meng-Ting Qiu
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, P.R. China
| | - Ting Cheng
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, P.R. China
| | - Jia Wang
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, P.R. China
| | - Chao-Feng Zheng
- Linfen Meternity & Child Healthcare Hospital, Linfen, P.R. China
| | - Zhi-Qin Lv
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, P.R. China
| | - Cai-Hong Wang
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, P.R. China
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5
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Tian H, Shakya A, Chen R, Wang F, Wu W, Li W. Comparative Ligandomic Analysis of Human Lung Epithelial Cells Exposed to PM 2.5. BIOMEDICAL AND ENVIRONMENTAL SCIENCES : BES 2020; 33:165-173. [PMID: 32209175 PMCID: PMC7607556 DOI: 10.3967/bes2020.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 12/16/2019] [Indexed: 05/30/2023]
Abstract
OBJECTIVE To investigate whether exposure to particulate matter of diameter equal to or less than 2.5 μm (PM 2.5) alters the response of lung epithelial cells to extrinsic regulation by globally profiling cell surface ligands and quantifying their binding activity. METHODS Human A549 lung epithelial cells (LECs) were treated with or without PM 2.5. Ligandomic profiling was applied to these cells for the global identification of LEC-binding ligands with simultaneous quantification of binding activity. Quantitative comparisons of the entire ligandome profiles systematically identified ligands with increased or decreased binding to PM 2.5-treated LECs. RESULTS We found 143 ligands with increased binding to PM 2.5-treated LECs and 404 ligands with decreased binding. Many other ligands showed no change in binding activity. For example, apolipoprotein E (ApoE), Notch2, and growth arrest-specific 6 (Gas6) represent ligands with increased, decreased, or unchanged binding activity, respectively. Both ApoE and Gas6 are phagocytosis ligands, suggesting that phagocytic receptors on LECs after stimulation with PM 2.5 were differentially upregulated by PM 2.5. CONCLUSION These results suggest that the newly-developed ligandomics is a valuable approach to globally profile the response of LECs to PM 2.5 in terms of regulating the expression of cell surface receptors, as quantified by ligand binding activity. This quantitative ligandome profiling will provide in-depth understanding of the LEC molecular response on the cell surface to particulate matter air pollution.
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Affiliation(s)
- Hong Tian
- School of Public Health, Xinxiang Medical University, Xinxiang, Henan, 453003, China
| | - Akhalesh Shakya
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami School of Medicine, Miami, Florida 33136
| | - Rui Chen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030
| | - Feng Wang
- Department of Genomic Medicine, UT MD Anderson Cancer Center. Houston TX 77054
| | - Weidong Wu
- School of Public Health, Xinxiang Medical University, Xinxiang, Henan, 453003, China
| | - Wei Li
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami School of Medicine, Miami, Florida 33136
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Chen L, Wang J, Jiang P, Ren F, Lei X, Guo H. Alteration of the colostrum whey proteome in mothers with gestational hypothyroidism. PLoS One 2018; 13:e0205987. [PMID: 30332478 PMCID: PMC6192644 DOI: 10.1371/journal.pone.0205987] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 10/04/2018] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Gestational hypothyroidism (G-HypoT) is one of the most common thyroid diseases in pregnant women. Human milk, which closely links the mother with infant, is an important factor to the infant health. Here, we analyzed the colostrum whey proteome of women with or without G-HypoT. METHODS AND RESULTS Using high-mass accuracy and high-resolution liquid chromatography-tandem mass spectrometry (LC-MS/MS), 1055 proteins were identified. Tandem Mass Tags (TMT) analysis identified differentially expressed proteins between G-HypoT and non-G-HypoT mothers. Of 44 proteins identified, 15 proteins were significantly increased in G-HypoT colostrum whey, while 29 were significantly decreased. Analysis revealed that enzymes involved in carbohydrate metabolism, and that reflect the metabolic activities in breastfeeding women, including fructose-1, 6-bisphosphatase 1, phosphoglycerate mutase 1 were down-regulated. Cell structural proteins, biomarkers of mammary integrity development, including Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and actin were lower in G-HypoT colostrum whey. However, immune protein fragments like Ig gamma-3 chain C region increased in G-HypoT colostrum whey. CONCLUSION These results implied that G-HypoT may changed human colostrum whey protein in composition level, decreasing levels of metabolic proteins and cell-structure proteins, while increasing levels of immune-related proteins, which may compromise or reflect mothers' and infants' health.
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Affiliation(s)
- Lingli Chen
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Jingxuan Wang
- Key Laboratory of Functional Dairy, co-constructed by Ministry of Education and Beijing Government, China Agricultural University, Beijing, China
| | - Pingping Jiang
- Department of Veterinary and Animal Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Fazheng Ren
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Key Laboratory of Functional Dairy, co-constructed by Ministry of Education and Beijing Government, China Agricultural University, Beijing, China
| | - Xingen Lei
- Department of Animal Science, Cornell University, Ithaca, NY, United States of America
| | - Huiyuan Guo
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Hebei Engineering Research Center of Animal Product, Sanhe, China
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7
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Li W, Webster KA, LeBlanc ME, Tian H. Secretogranin III: a diabetic retinopathy-selective angiogenic factor. Cell Mol Life Sci 2018; 75:635-647. [PMID: 28856381 PMCID: PMC5771826 DOI: 10.1007/s00018-017-2635-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/25/2017] [Accepted: 08/28/2017] [Indexed: 12/13/2022]
Abstract
Secretogranin III (Scg3) is a member of the granin protein family that regulates the biogenesis of secretory granules. Scg3 was recently discovered as an angiogenic factor, expanding its functional role to extrinsic regulation. Unlike many other known angiogenic factors, the pro-angiogenic actions of Scg3 are restricted to pathological conditions. Among thousands of quantified endothelial ligands, Scg3 has the highest binding activity ratio to diabetic vs. healthy mouse retinas and lowest background binding to normal vessels. In contrast, vascular endothelial growth factor binds to and stimulates angiogenesis of both diabetic and control vasculature. Consistent with its role in pathological angiogenesis, Scg3-neutralizing antibodies alleviate retinal vascular leakage in mouse models of diabetic retinopathy and retinal neovascularization in oxygen-induced retinopathy mice. This review summarizes our current knowledge of Scg3 as a regulatory protein of secretory granules, highlights its new role as a highly disease-selective angiogenic factor, and envisions Scg3 inhibitors as "selective angiogenesis blockers" for targeted therapy.
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Affiliation(s)
- Wei Li
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami School of Medicine, Miami, FL, 33136, USA.
- Vascular Biology Institute, University of Miami School of Medicine, Miami, FL, 33136, USA.
| | - Keith A Webster
- Vascular Biology Institute, University of Miami School of Medicine, Miami, FL, 33136, USA
- Department Pharmacology, University of Miami School of Medicine, Miami, FL, 33136, USA
| | - Michelle E LeBlanc
- Schepens Eye Research Institute, Harvard Medical School, Boston, MA, 02114, USA
| | - Hong Tian
- Everglades Biopharma, Miami, FL, 33156, USA
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8
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Ligandomics: a paradigm shift in biological drug discovery. Drug Discov Today 2018; 23:636-643. [PMID: 29326083 DOI: 10.1016/j.drudis.2018.01.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 11/10/2017] [Accepted: 01/04/2018] [Indexed: 02/06/2023]
Abstract
As productivity of pharmaceutical research and development (R&D) for small-molecule drugs declines, the trend in drug discovery strategies is shifting towards biologics, which predominantly target secreted or cell surface proteins. Receptors and ligands are the most-valuable drug targets. In contrast to conventional approaches of discovering one ligand at a time, the emerging technology of ligandomics can systematically map disease-selective cellular ligands in the absence of molecular probes. Biologics targeting these ligands with disease selectivity have the advantages of high efficacy, minimal adverse effects, wide therapeutic indices, and low safety-related attrition rates. Therefore, ligandomics represents a paradigm shift to address the bottleneck of target discovery for biologics development.
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9
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LeBlanc ME, Wang W, Chen X, Caberoy NB, Guo F, Shen C, Ji Y, Tian H, Wang H, Chen R, Li W. Secretogranin III as a disease-associated ligand for antiangiogenic therapy of diabetic retinopathy. J Exp Med 2017; 214:1029-1047. [PMID: 28330905 PMCID: PMC5379984 DOI: 10.1084/jem.20161802] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 12/23/2016] [Accepted: 02/15/2017] [Indexed: 12/20/2022] Open
Abstract
LeBlanc et al. uncover secretogranin III (Scg3) as a unique disease-associated vascular permeability and angiogenic factor using comparative ligandomics. Scg3-neutralizing antibodies alleviate vascular leakage in diabetic retinopathy mice and retinal neovascularization in oxygen-induced retinopathy mice with high efficacy. Diabetic retinopathy (DR) is a leading cause of vision loss with retinal vascular leakage and/or neovascularization. Current antiangiogenic therapy against vascular endothelial growth factor (VEGF) has limited efficacy. In this study, we applied a new technology of comparative ligandomics to diabetic and control mice for the differential mapping of disease-related endothelial ligands. Secretogranin III (Scg3) was discovered as a novel disease-associated ligand with selective binding and angiogenic activity in diabetic but not healthy vessels. In contrast, VEGF bound to and induced angiogenesis in both diabetic and normal vasculature. Scg3 and VEGF signal through distinct receptor pathways. Importantly, Scg3-neutralizing antibodies alleviated retinal vascular leakage in diabetic mice with high efficacy. Furthermore, anti-Scg3 prevented retinal neovascularization in oxygen-induced retinopathy mice, a surrogate model for retinopathy of prematurity (ROP). ROP is the most common cause of vision impairment in children, with no approved drug therapy. These results suggest that Scg3 is a promising target for novel antiangiogenic therapy of DR and ROP.
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Affiliation(s)
- Michelle E LeBlanc
- Bascom Palmer Eye Institute, University of Miami School of Medicine, Miami, FL 33136
| | - Weiwen Wang
- Bascom Palmer Eye Institute, University of Miami School of Medicine, Miami, FL 33136
| | - Xiuping Chen
- Bascom Palmer Eye Institute, University of Miami School of Medicine, Miami, FL 33136.,Department of Ophthalmology, Zhongshan Hospital, Fudan University, Shanghai 200433, China
| | - Nora B Caberoy
- School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV 89154
| | - Feiye Guo
- Bascom Palmer Eye Institute, University of Miami School of Medicine, Miami, FL 33136
| | - Chen Shen
- Bascom Palmer Eye Institute, University of Miami School of Medicine, Miami, FL 33136
| | - Yanli Ji
- Bascom Palmer Eye Institute, University of Miami School of Medicine, Miami, FL 33136.,Department of Ophthalmology, Zhengzhou Eye Hospital, Zhengzhou 450000, Henan, China
| | - Hong Tian
- Bascom Palmer Eye Institute, University of Miami School of Medicine, Miami, FL 33136.,School of Public Health, Xinxiang Medical University, Xinxiang, Henan 453003, China.,Everglades Biopharma, Miami, FL 33156
| | - Hui Wang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030
| | - Rui Chen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030
| | - Wei Li
- Bascom Palmer Eye Institute, University of Miami School of Medicine, Miami, FL 33136 .,Vascular Biology Institute, University of Miami School of Medicine, Miami, FL 33136
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10
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Mesd extrinsically promotes phagocytosis by retinal pigment epithelial cells. Cell Biol Toxicol 2016; 32:347-58. [PMID: 27184668 DOI: 10.1007/s10565-016-9339-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 05/09/2016] [Indexed: 01/09/2023]
Abstract
Phagocytosis is a critical process to maintain tissue homeostasis. In the retina, photoreceptor cells renew their photoexcitability by shedding photoreceptor outer segments (POSs) in a diurnal rhythm. Shed POSs are phagocytosed by retinal pigment epithelial (RPE) cells to prevent debris accumulation, retinal degeneration, and blindness. Phagocytosis ligands are the key to understanding how RPE recognizes shed POSs. Here, we characterized mesoderm development candidate 2 (Mesd or Mesdc2), an endoplasmic reticulum (ER) chaperon for low-density lipoprotein receptor-related proteins (LRPs), to extrinsically promote RPE phagocytosis. The results showed that Mesd stimulated phagocytosis of fluorescence-labeled POS vesicles by D407 RPE cells. Ingested POSs were partially degraded within 3 h in some RPE cells to dispense undegradable fluorophore throughout the cytoplasm. Internalized POSs were colocalized with phagosome biomarker Rab7, suggesting that Mesd-mediated engulfment is involved in a phagocytosis pathway. Mesd also facilitated phagocytosis of POSs by primary RPE cells. Mesd bound to unknown phagocytic receptor(s) on RPE cells. Mesd was detected in the cytoplasm, but not nuclei, of different retinal layers and is predominantly expressed in the ER-free cellular compartment of POSs. Mesd was not secreted into medium from healthy cells but passively released from apoptotic cells with increased membrane permeability. Released Mesd selectively bound to the surface of POS vesicles and apoptotic cells, but not healthy cells. These results suggest that Mesd may be released from and bind to shed POSs to facilitate their phagocytic clearance.
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LeBlanc ME, Wang W, Chen X, Ji Y, Shakya A, Shen C, Zhang C, Gonzalez V, Brewer M, Ma JX, Wen R, Zhang F, Li W. The regulatory role of hepatoma-derived growth factor as an angiogenic factor in the eye. Mol Vis 2016; 22:374-86. [PMID: 27122967 PMCID: PMC4842004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Accepted: 04/21/2016] [Indexed: 11/27/2022] Open
Abstract
PURPOSE Hepatoma-derived growth factor (HDGF) is a mitogen that promotes endothelial proliferation and neuronal survival. Using a unique technology of ligandomics, we recently identified HDGF as a retinal endothelial binding protein. The purpose of this study is to examine the role of HDGF in regulating ocular vasculature and the expression of HDGF in the retina. METHODS HDGF expression in the retinal was analyzed with western blot and immunohistochemistry. Angiogenic activity was investigated in human retinal microvascular endothelial cells (HRMVECs) with in vitro endothelial proliferation, migration, and permeability assays. In vivo angiogenic activity was quantified with a corneal pocket assay. The Evans blue assay and western blot using anti-mouse albumin were performed to detect the capacity of HDGF to induce retinal vascular leakage. RESULTS Immunohistochemistry revealed that HDGF is expressed in the retina with a distinct pattern. HDGF was detected in retinal ganglion cells and the inner nuclear layer but not in the inner plexiform layer, suggesting that HDGF is expressed in the nucleus, but not in the cytoplasm, of retinal neurons. In contrast to family member HDGF-related protein 3 (HRP-3) that has no expression in photoreceptors, HDGF is also present in the outer nuclear layer and the inner and outer segments of photoreceptors. This suggests that HDGF is expressed in the nucleus as well as the cytoplasm of photoreceptors. In vitro functional assays showed that HDGF induced the proliferation, migration, and permeability of HRMVECs. Corneal pocket assay indicated that HDGF directly stimulated angiogenesis in vivo. Intravitreal injection of HDGF significantly induced retinal vascular leakage. CONCLUSIONS These results suggest that HDGF is an angiogenic factor that regulates retinal vasculature in physiologic and pathological conditions. Identification of HDGF by ligandomics and its independent characterization in this study also support the validity of this new technology for systematic identification of cellular ligands, including angiogenic factors.
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Affiliation(s)
- Michelle E. LeBlanc
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami School of Medicine, Miami, FL
| | - Weiwen Wang
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami School of Medicine, Miami, FL
| | - Xiuping Chen
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami School of Medicine, Miami, FL,Department of Ophthalmology, Zhongshan Hospital of Fudan University, Shanghai, China
| | - Yanli Ji
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami School of Medicine, Miami, FL,Department of Ophthalmology, 2nd People’s Hospital of Zhengzhou, Zhengzhou, Henan, China
| | - Akhalesh Shakya
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami School of Medicine, Miami, FL
| | - Chen Shen
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami School of Medicine, Miami, FL
| | - Chenming Zhang
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami School of Medicine, Miami, FL,Department of Ophthalmology, Jinan 2nd People’s Hospital, Jinan, China
| | - Vivianne Gonzalez
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami School of Medicine, Miami, FL
| | - Megan Brewer
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami School of Medicine, Miami, FL
| | - Jian-xing Ma
- Department of Physiology, the University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Rong Wen
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami School of Medicine, Miami, FL
| | - Fangliang Zhang
- Department of Molecular and Cellular Pharmacology, Sylvester Comprehensive Cancer Center, University of Miami, School of Medicine
| | - Wei Li
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami School of Medicine, Miami, FL,Vascular Biology Institute, University of Miami School of Medicine, Miami, FL
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