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Pacot L, Sabbagh A, Sohier P, Hadjadj D, Ye M, Boland-Auge A, Bacq-Daian D, Laurendeau I, Briand-Suleau A, Deleuze JF, Margueron R, Vidaud M, Ferkal S, Parfait B, Vidaud D, Pasmant E, Wolkenstein P. Identification of potential common genetic modifiers of neurofibromas: a genome-wide association study in 1333 patients with neurofibromatosis type 1. Br J Dermatol 2024; 190:226-243. [PMID: 37831592 DOI: 10.1093/bjd/ljad390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 09/23/2023] [Accepted: 10/03/2023] [Indexed: 10/15/2023]
Abstract
BACKGROUND Neurofibromatosis type 1 (NF1) is characterized by the highly variable and unpredictable development of benign peripheral nerve sheath tumours: cutaneous (cNFs), subcutaneous (scNFs) and plexiform (pNFs) neurofibromas. OBJECTIVES To identify neurofibroma modifier genes, in order to develop a database of patients with NF1. METHODS All patients were phenotypically evaluated by a medical practitioner using a standardized questionnaire and the causal NF1 variant identified. We enrolled 1333 patients with NF1 who were genotyped for > 7 million common variants. RESULTS A genome-wide association case-only study identified a significant association with 9q21.33 in the pNF phenotype in the discovery cohort. Twelve, three and four regions suggestive of association at the P ≤ 1 × 10-6 threshold were identified for pNFs, cNFs and scNFs, respectively. Evidence of replication was observed for 4, 2 and 6 loci, including 168 candidate modifier protein-coding genes. Among the candidate modifier genes, some were implicated in the RAS-mitogen-activated protein kinase pathway, cell-cycle control and myelination. Using an original CRISPR/Cas9-based functional assay, we confirmed GAS1 and SPRED2 as pNF and scNF candidate modifiers, as their inactivation specifically affected NF1-mutant Schwann cell growth. CONCLUSIONS Our study may shed new light on the pathogenesis of NF1-associated neurofibromas and will, hopefully, contribute to the development of personalized care for patients with this deleterious and life-threatening condition.
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Affiliation(s)
- Laurence Pacot
- Fédération de Génétique et Médecine Génomique, Hôpital Cochin, DMU BioPhyGen, AP-HP, Centre-Université Paris Cité, Paris, France
- Institut Cochin, Inserm U1016, CNRS UMR8104, UFR de Pharmacie de Paris, Université Paris Cité, CARPEM, Paris, France
| | - Audrey Sabbagh
- UMR 261 MERIT, Institut de Recherche pour le Développement, UFR de Pharmacie de Paris, Université Paris Cité, Paris, France
| | - Pierre Sohier
- Service de Pathologie, Hôpital Cochin, AP-HP, Centre-Université Paris Cité, Paris, France
| | - Djihad Hadjadj
- Institut Cochin, Inserm U1016, CNRS UMR8104, UFR de Pharmacie de Paris, Université Paris Cité, CARPEM, Paris, France
| | - Manuela Ye
- Institut Cochin, Inserm U1016, CNRS UMR8104, UFR de Pharmacie de Paris, Université Paris Cité, CARPEM, Paris, France
| | - Anne Boland-Auge
- Université Paris-Saclay, CEA, Centre National de Recherche en Génomique Humaine (CNRGH), Evry, France
| | - Delphine Bacq-Daian
- Université Paris-Saclay, CEA, Centre National de Recherche en Génomique Humaine (CNRGH), Evry, France
| | - Ingrid Laurendeau
- Institut Cochin, Inserm U1016, CNRS UMR8104, UFR de Pharmacie de Paris, Université Paris Cité, CARPEM, Paris, France
| | - Audrey Briand-Suleau
- Fédération de Génétique et Médecine Génomique, Hôpital Cochin, DMU BioPhyGen, AP-HP, Centre-Université Paris Cité, Paris, France
- Institut Cochin, Inserm U1016, CNRS UMR8104, UFR de Pharmacie de Paris, Université Paris Cité, CARPEM, Paris, France
| | - Jean-François Deleuze
- Université Paris-Saclay, CEA, Centre National de Recherche en Génomique Humaine (CNRGH), Evry, France
| | - Raphaël Margueron
- Institut Curie, INSERM U934/CNRS UMR3215, Paris Sciences et Lettres Research University, Sorbonne University, Paris, France
| | - Michel Vidaud
- Fédération de Génétique et Médecine Génomique, Hôpital Cochin, DMU BioPhyGen, AP-HP, Centre-Université Paris Cité, Paris, France
- Institut Cochin, Inserm U1016, CNRS UMR8104, UFR de Pharmacie de Paris, Université Paris Cité, CARPEM, Paris, France
| | - Salah Ferkal
- Department of Dermatology, Hôpital Henri Mondor, Assistance Publique-Hôpital Paris (AP-HP), Créteil, France
- INSERM, Clinical Investigation Center 1430, Referral Center of Neurofibromatosis, Hôpital Henri Mondor, AP-HP, Faculté de Santé Paris Est Créteil, Créteil, France
| | - Béatrice Parfait
- Fédération de Génétique et Médecine Génomique, Hôpital Cochin, DMU BioPhyGen, AP-HP, Centre-Université Paris Cité, Paris, France
- Institut Cochin, Inserm U1016, CNRS UMR8104, UFR de Pharmacie de Paris, Université Paris Cité, CARPEM, Paris, France
| | - Dominique Vidaud
- Fédération de Génétique et Médecine Génomique, Hôpital Cochin, DMU BioPhyGen, AP-HP, Centre-Université Paris Cité, Paris, France
- Institut Cochin, Inserm U1016, CNRS UMR8104, UFR de Pharmacie de Paris, Université Paris Cité, CARPEM, Paris, France
| | - Eric Pasmant
- Fédération de Génétique et Médecine Génomique, Hôpital Cochin, DMU BioPhyGen, AP-HP, Centre-Université Paris Cité, Paris, France
- Institut Cochin, Inserm U1016, CNRS UMR8104, UFR de Pharmacie de Paris, Université Paris Cité, CARPEM, Paris, France
| | - Pierre Wolkenstein
- Department of Dermatology, Hôpital Henri Mondor, Assistance Publique-Hôpital Paris (AP-HP), Créteil, France
- INSERM, Clinical Investigation Center 1430, Referral Center of Neurofibromatosis, Hôpital Henri Mondor, AP-HP, Faculté de Santé Paris Est Créteil, Créteil, France
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SLC6A14 Depletion Contributes to Amino Acid Starvation to Suppress EMT-Induced Metastasis in Gastric Cancer by Perturbing the PI3K/AKT/mTORC1 Pathway. BIOMED RESEARCH INTERNATIONAL 2022; 2022:7850658. [PMID: 35865664 PMCID: PMC9296317 DOI: 10.1155/2022/7850658] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 05/10/2022] [Accepted: 05/20/2022] [Indexed: 11/18/2022]
Abstract
Metastasis is the main obstacle for the treatment of gastric cancer (GC), leading to low survival rate and adverse outcomes in CG patients. SLC6A14, a general amino acid transporter, can import all the essential amino acids in a manner dependent on the NaCl-generated osmotic gradients. Herein, we constructed GC cell sublines with high (SGC7901-M and MKN28-M) and low (MKN28-NM and SGC7901-NM) metastatic ability. Putative functional genes advancing GC metastasis were identified using mRNA microarray analysis and High-Content Screening. In particular, most significant change with a dampening trend in the migration potentiality of GC cells emerged after SLC6A14 gene was silenced. SLC6A14 expression was positively correlated with the migrated capability of different GC cell lines, and SLC6A14 was also constitutively expressed in GC patients with venous or lymphatic invasion, lymph node, or distant metastasis and poor prognosis, thus prompting SLC6A14 as a nonnegligible presence in supporting GC migration and invasion. Consistently, SLC6A14 depletion drastically depressed GC metastasis in vitro and in vivo. Most importantly, pharmacological blockade and gene silence of SLC6A14 both restricted epithelial-mesenchymal transition- (EMT-) driven GC metastasis, in which attenuated activation of the PI3K/AKT/mTORC1 pathway caused by amino acid starvation was involved. In summary, it is conceivable that targeting SLC6A14 has a tremendous promising for the treatment of metastatic GC.
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3
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Bae WJ, Woo KJ, Ahn JM, Yang CM, Kim YS, Kim S, Lee D. miR-4742-5p promotes invasiveness of gastric cancer via targeting Rab43: An in vitro study. Biochem Biophys Res Commun 2022; 613:180-186. [PMID: 35597125 DOI: 10.1016/j.bbrc.2022.05.044] [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: 04/27/2022] [Accepted: 05/12/2022] [Indexed: 11/02/2022]
Abstract
miRNA (miR)-4742-5p is a recently identified microRNA regarding progression and metastasis in gastric cancer (GC). However, the biological function of this novel miRNA is largely unknown. We identified that the miR-4742-5p expression level was variably increased in GC cell lines. Suppression of miR-4742-5p using miR-inhibitor reduced the proliferation, migration, and invasion of GC cells with high miR-4742-5p expression, whereas overexpression of miR-4742-5p-mimic enhanced the aforementioned properties in GC cells with low miR-4742-5p expression. miR-4742-5p expression induced the decreases of Zo-1 and E-cadherin expression as well as the increases of vimentin and N-cadherin expression, leading to epithelial-mesenchymal transition (EMT) of cancer cells. RNA sequencing results indicated Ras-related GTP-binding protein 43 (Rab43) as a potential target gene. We identified that the expression of Rab43 is associated with activation of AKT and nuclear factor-kappa B (NF-κB) which are key oncogenic pathways in cancer cells. Our results demonstrate a new component in GC progression, promising a potential therapeutic strategy.
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Affiliation(s)
- Won Jung Bae
- Department of Pathology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Kyoung-Jin Woo
- Department of Pathology, Ajou University School of Medicine, Suwon, Republic of Korea; Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
| | - Ji Mi Ahn
- Department of Pathology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Chan-Mo Yang
- Department of Pathology, Ajou University School of Medicine, Suwon, Republic of Korea; Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
| | - You-Sun Kim
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea; Department of Biochemistry, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Seokhwi Kim
- Department of Pathology, Ajou University School of Medicine, Suwon, Republic of Korea; Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea.
| | - Dakeun Lee
- Department of Pathology, Ajou University School of Medicine, Suwon, Republic of Korea; Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea.
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Wang L, Zhu L, Zheng Z, Meng L, Liu H, Wang K, Chen J, Li P, Yang H. Mevalonate pathway orchestrates insulin signaling via RAB14 geranylgeranylation-mediated phosphorylation of AKT to regulate hepatic glucose metabolism. Metabolism 2022; 128:155120. [PMID: 34995578 DOI: 10.1016/j.metabol.2021.155120] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/17/2021] [Accepted: 12/28/2021] [Indexed: 12/14/2022]
Abstract
Statin use accompanies with increased risk of new onset of type 2 diabetes, however, the underlying mechanisms remain not be fully understood and effective prevention strategies are still lacking. Herein, we find that both pharmacological and genetic inhibition of GGTase II mimic the disruption of simvastatin on hepatic insulin signaling and glucose metabolism in vitro. AAV8-mediated knockdown of liver RABGGTA, the specific subunit of GGTase II, triggers systemic glucose metabolism disorders in vivo. By adopting a small-scale siRNA screening, we identify RAB14 as a regulator of hepatic insulin signaling and glucose metabolism. Geranylgeranylation deficiency of RAB14 inhibits the phosphorylation of AKT (Ser473) and disrupts hepatic insulin signaling and glucose metabolism possibly via impeding mTORC2 complex assembly. Finally, geranylgeranyl pyrophosphate (GGPP) supplementation is sufficient to prevent simvastatin-caused disruption of hepatic insulin signaling and glucose metabolism in vitro. Geranylgeraniol (GGOH), a precursor of GGPP, is able to ameliorate simvastatin-induced systemic glucose metabolism disorders in vivo. In conclusion, our data indicate that statins-targeted mevalonate pathway regulates hepatic insulin signaling and glucose metabolism via geranylgeranylation of RAB14. GGPP/GGOH supplementation might be an effective strategy for the prevention of the diabetic effects of statins.
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Affiliation(s)
- Lai Wang
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Lijun Zhu
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Zuguo Zheng
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Lingchang Meng
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Hanling Liu
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Keke Wang
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Jun Chen
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Ping Li
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China.
| | - Hua Yang
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China.
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Laubach ZM, Greenberg JR, Turner JW, Montgomery TM, Pioon MO, Sawdy MA, Smale L, Cavalcante RG, Padmanabhan KR, Lalancette C, vonHoldt B, Faulk CD, Dolinoy DC, Holekamp KE, Perng W. Early-life social experience affects offspring DNA methylation and later life stress phenotype. Nat Commun 2021; 12:4398. [PMID: 34285226 PMCID: PMC8292380 DOI: 10.1038/s41467-021-24583-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 06/24/2021] [Indexed: 02/06/2023] Open
Abstract
Studies in rodents and captive primates suggest that the early-life social environment affects future phenotype, potentially through alterations to DNA methylation. Little is known of these associations in wild animals. In a wild population of spotted hyenas, we test the hypothesis that maternal care during the first year of life and social connectedness during two periods of early development leads to differences in DNA methylation and fecal glucocorticoid metabolites (fGCMs) later in life. Here we report that although maternal care and social connectedness during the den-dependent life stage are not associated with fGCMs, greater social connectedness during the subadult den-independent life stage is associated with lower adult fGCMs. Additionally, more maternal care and social connectedness after den independence correspond with higher global (%CCGG) DNA methylation. We also note differential DNA methylation near 5 genes involved in inflammation, immune response, and aging that may link maternal care with stress phenotype.
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Affiliation(s)
- Zachary M Laubach
- Department of Integrative Biology, Michigan State University, East Lansing, MI, USA.
- Program in Ecology, Evolution, and Behavior, Michigan State University, East Lansing, USA MI, USA.
- BEACON, NSF Center for the Study of Evolution in Action, Michigan State University, East Lansing, MI, USA.
- Mara Hyena Project, Masai Mara National Reserve, Narok, Kenya.
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA.
| | - Julia R Greenberg
- Department of Integrative Biology, Michigan State University, East Lansing, MI, USA
- Program in Ecology, Evolution, and Behavior, Michigan State University, East Lansing, USA MI, USA
- Mara Hyena Project, Masai Mara National Reserve, Narok, Kenya
| | - Julie W Turner
- Department of Integrative Biology, Michigan State University, East Lansing, MI, USA
- Program in Ecology, Evolution, and Behavior, Michigan State University, East Lansing, USA MI, USA
- BEACON, NSF Center for the Study of Evolution in Action, Michigan State University, East Lansing, MI, USA
- Mara Hyena Project, Masai Mara National Reserve, Narok, Kenya
| | - Tracy M Montgomery
- Department of Integrative Biology, Michigan State University, East Lansing, MI, USA
- Program in Ecology, Evolution, and Behavior, Michigan State University, East Lansing, USA MI, USA
- Mara Hyena Project, Masai Mara National Reserve, Narok, Kenya
- Max Planck Institute of Animal Behavior, Department for the Ecology of Animal Societies, Konstanz, Germany
| | - Malit O Pioon
- Mara Hyena Project, Masai Mara National Reserve, Narok, Kenya
| | - Maggie A Sawdy
- Department of Integrative Biology, Michigan State University, East Lansing, MI, USA
- Program in Ecology, Evolution, and Behavior, Michigan State University, East Lansing, USA MI, USA
| | - Laura Smale
- Department of Integrative Biology, Michigan State University, East Lansing, MI, USA
- Department of Psychology, Michigan State University, East Lansing, MI, USA
| | | | | | | | - Bridgett vonHoldt
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, USA
| | | | - Dana C Dolinoy
- Epigenomics Core, University of Michigan, Ann Arbor, MI, USA
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI, USA
- Department of Nutritional Sciences, University of Michigan School of Public Health, Ann Arbor, MI, USA
| | - Kay E Holekamp
- Department of Integrative Biology, Michigan State University, East Lansing, MI, USA
- Program in Ecology, Evolution, and Behavior, Michigan State University, East Lansing, USA MI, USA
- BEACON, NSF Center for the Study of Evolution in Action, Michigan State University, East Lansing, MI, USA
- Mara Hyena Project, Masai Mara National Reserve, Narok, Kenya
| | - Wei Perng
- Department of Epidemiology and Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Denver, Aurora, CO, USA
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Ren B, Wang L, Nan Y, Liu T, Zhao L, Ma H, Li J, Zhang Y, Ren X. RAB1A regulates glioma cellular proliferation and invasion via the mTOR signaling pathway and epithelial-mesenchymal transition. Future Oncol 2021; 17:3203-3216. [PMID: 33947216 DOI: 10.2217/fon-2021-0116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Aim: We aimed at investigating the mechanism of RAB1A proliferation and invasion in gliomas. Materials & methods: Genome-wide expression profile data and immunohistochemistry were analyzed to assess RAB1A expression in gliomas. The Transwell assay, wound healing assay, brain slice coculture model, cellular fluorescence and intracranial xenograft model of nude mice were used to determine the proliferation and invasion of glioma cells. Results & conclusion: RAB1A was highly expressed in gliomas compared with normal brain tissue. The overall survival time of glioma patients with high RAB1A expression was significantly shortened. RAB1A regulated the activity of RAC1 by inhibiting the mTOR signaling pathway, affecting actin polymerization, cell morphology and cell polarity. RAB1A downregulation inhibited the epithelial-mesenchymal transition, proliferation and invasion of glioma cells.
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Affiliation(s)
- Bingcheng Ren
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, 300052, China.,Department of Neurosurgery, Tianjin Medical University General Hospital Airport Site, Tianjin, 300308, China.,Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin, 300052, China
| | - Le Wang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, 300052, China.,Department of Neurosurgery, Tianjin Medical University General Hospital Airport Site, Tianjin, 300308, China
| | - Yang Nan
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, 300052, China.,Department of Neurosurgery, Tianjin Medical University General Hospital Airport Site, Tianjin, 300308, China
| | - Tong Liu
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, 300052, China.,Department of Neurosurgery, Tianjin Medical University General Hospital Airport Site, Tianjin, 300308, China
| | - Liwen Zhao
- Department of Neurosurgery, Tianjin Medical University General Hospital Airport Site, Tianjin, 300308, China
| | - Haiwen Ma
- Department of Neurosurgery, Tianjin Medical University General Hospital Airport Site, Tianjin, 300308, China
| | - Jiabo Li
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, 300052, China.,Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin, 300052, China
| | - Yiming Zhang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, 300052, China.,Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin, 300052, China
| | - Xiao Ren
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, 300052, China.,Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin, 300052, China
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The oncogenic role of ubiquitin specific peptidase (USP8) and its signaling pathways targeting for cancer therapeutics. Arch Biochem Biophys 2021; 701:108811. [PMID: 33600786 DOI: 10.1016/j.abb.2021.108811] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 01/08/2021] [Accepted: 02/11/2021] [Indexed: 01/06/2023]
Abstract
USP8 is a deubiquitinating enzyme in the family of ubiquitin-specific proteases (USPs) which can remove ubiquitin from the substrate and protect the substrate from degradation. The upregulated or mutated USP8 becomes hyperactivated and stabilizes numerous oncogenes or proto-oncogenes leading to cancer progression and survival by activating multiple signaling pathways. Moreover, USP8 inhibition is also important to overcome anticancer drug-resistant. This review is the first study to find, combine, analyze, and represent the multiple oncogenic signaling pathways with their downstream and upstream regulation activated or enhanced by USP8, which will help the researchers to find any therapeutic strategy for drug discovery by inhibiting or suppressing the multi-targeted USP8.
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8
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Sun J, Shen D, Gao Y, Zheng Y, Zhao L, Maa M, Liu H, Chen X. Down-Regulation of USP8 Suppresses HER-3 Positive Gastric Cancer Cells Proliferation. Onco Targets Ther 2020; 13:7973-7984. [PMID: 32848421 PMCID: PMC7429216 DOI: 10.2147/ott.s264108] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 07/27/2020] [Indexed: 12/22/2022] Open
Abstract
Background Ubiquitin specific peptidase 8 (USP8) has been reported to induce the degradation of several receptor tyrosine kinases such as epidermal growth factor receptor (EGFR), among which human epidermal growth factor receptor-3 (HER-3) is one of them. However, the role and functional mechanisms of USP8 and HER-3 in gastric cancer (GC) remain unknown. Objective To explore the function and mechanism of USP8 and HER-3 in the progression of GC. Materials and Methods Eighty-eight patients with histologically confirmed GC were recruited for this study. Tumor samples and GC cell lines were used to detect USP8 and HER-3 levels. MGC803 (HER-3 negative GC cell) was selected as the control group and NCI-N87, MKN-45 and AGS (HER-3 positive GC cells) as the experimental group. USP8i and si-RNA were then used to down-regulate USP8 in each group. Apoptosis and cell-cycle experiments were performed to detect the effects of USP8 on GC cells. Cytotoxicity Assay Kit (MTT) and colony formation assays were used to analyze cell proliferation. Cell migration and invasion ability were examined by wound healing. The expression of related mRNA and protein was detected by Western blot and quantitative real-time PCR (qRT-PCR). In vivo experiments were used to examine the effect of USP8 and HER-3. Results Patients with high expression of USP8 or HER-3 tumors alone died earlier than those with low expression and the patients with both USP8 and HER-3 high expression had a shorter overall survival than those with the opposite pattern (both USP8 and HER-3 low expression). Down-regulation of USP8 inhibited cell proliferation and cell metastasis and also reduced the HER-3 expression. We also observed that down-regulation of USP8 inhibited the proliferation of GC cells which highly expressed HER-3. Moreover, down-regulation of USP8 could promote the apoptosis of HER3-positive GC cells and inhibit the proliferation of them by affecting the cell-cycle. In vivo studies demonstrated that down-regulation of USP8 inhibited HER-3 positive tumors growth. Conclusion Down-regulation of USP8 inhibits HER-3 positive GC cells proliferation in vivo and in vitro, which indicate that USP8 represents a feasible choice as a therapeutic target for HER-3 positive GC cells.
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Affiliation(s)
- Jiangang Sun
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Dandan Shen
- Key Laboratory of Advanced Pharmaceutical Technology, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Yongshun Gao
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Yichao Zheng
- Key Laboratory of Advanced Pharmaceutical Technology, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Lijuan Zhao
- Key Laboratory of Advanced Pharmaceutical Technology, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Mamum Maa
- Key Laboratory of Advanced Pharmaceutical Technology, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Hongmin Liu
- Key Laboratory of Advanced Pharmaceutical Technology, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Xiaoping Chen
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China.,Department of Hepatic Surgery of Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
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β-arrestin1 inhibits hypoxic injury-induced autophagy in human pulmonary artery endothelial cells via the Akt/mTOR signaling pathway. Int J Biochem Cell Biol 2020; 125:105791. [PMID: 32544529 DOI: 10.1016/j.biocel.2020.105791] [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: 04/13/2020] [Revised: 05/20/2020] [Accepted: 06/10/2020] [Indexed: 12/18/2022]
Abstract
Autophagy has been greatly implicated in injured endothelial cells during pulmonary arterial hypertension (PAH). β-arrestin1, a multifunctional cytoplasmic protein, has attracted considerable attention as an essential protective factor in PAH. However, its role in autophagy of injured pulmonary arterial endothelial cells (PAECs) remains to be determined. Here, we investigated the potential effects of β-arrestin1 on autophagy and apoptosis in human PAECs (hPAECs) under hypoxic stress. Hypoxic stimuli increases autophagy and decreases the level of β-arrestin1 in hPAECs. Furthermore, pathologic changes, namely increased proliferation, migration, and apoptosis resistance, are observed after hypoxia exposure. These are reversed after β-arrestin1 overexpression (β-arrestin1-OV) or treatment with 3-MA, an autophagy inhibitor. Finally, β-arrestin1 suppresses the increase in autophagy and apoptosis resistance of hypoxic hPAECs. Mechanistically, β-arrestin1 upregulates the activity of the Akt/mTOR signaling pathway and downregulates the expression of BNIP3 and Nix after hypoxic stress. Collectively, we have demonstrated, for the first time, that β-arrestin1 reduces excessive autophagy and apoptosis resistance by activating the Akt/mTOR axis in hypoxic hPAECs. This knowledge suggests a promising therapeutic target for PAH.
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