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Wang YC, Chen RF, Liu KF, Chen WY, Lee CC, Kuo YR. Adipose-derived stem cell modulate tolerogenic dendritic cell-induced T cell regulation is correlated with activation of Notch-NFκB signaling. Cytotherapy 2024:S1465-3249(24)00574-7. [PMID: 38625070 DOI: 10.1016/j.jcyt.2024.03.482] [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: 11/09/2023] [Revised: 03/01/2024] [Accepted: 03/22/2024] [Indexed: 04/17/2024]
Abstract
BACKGROUND Adipose-derived stem cells (ASCs) are recognized for their potential immunomodulatory properties. In the immune system, tolerogenic dendritic cells (DCs), characterized by an immature phenotype, play a crucial role in inducing regulatory T cells (Tregs) and promoting immune tolerance. Notch1 signaling has been identified as a key regulator in the development and function of DCs. However, the precise involvement of Notch1 pathway in ASC-mediated modulation of tolerogenic DCs and its impact on immune modulation remain to be fully elucidated. This study aims to investigate the interplay between ASCs and DCs, focusing the role of Notch1 signaling and downstream pathways in ASC-modulated tolerogenic DCs. METHODS Rat bone marrow-derived myeloid DCs were directly co-cultured with ASCs to generate ASC-treated DCs (ASC-DCs). Notch signaling was inhibited using DAPT, while NFκB pathways were inhibited by NEMO binding domain peptide and si-NIK. Flow cytometry assessed DC phenotypes. Real-time quantitative PCR, Western blotting and immunofluorescence determined the expression of Notch1, Jagged1 and the p52/RelB complex in ASC- DCs. RESULTS Notch1 and Jagged1 were highly expressed on both DCs and ASCs. ASC-DCs displayed significantly reduced levels of CD80, CD86 and MHC II compared to mature DCs. Inhibiting the Notch pathway with DAPT reversed the dedifferentiation effects. The percentage of induced CD25+/FOXP3+/CD4+ Tregs decreased when ASC-DCs were treated with DAPT (inhibition of the Notch pathway) and si-NIK (inhibition of the non-canonical NFκB pathway). CONCLUSIONS ASCs induce DC tolerogenicity by inhibiting maturation and promoting downstream Treg generation, involving the Notch and NFκB pathways. ASC-induced tolerogenic DCs can be a potential immunomodulatory tool for clinical application.
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Affiliation(s)
- Yu-Chi Wang
- Division of Plastic and Reconstruction Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Rong-Fu Chen
- Division of Plastic and Reconstruction Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Keng-Fan Liu
- Division of Plastic and Reconstruction Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Wei-Yu Chen
- Division of Plastic and Reconstruction Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Chia-Chun Lee
- Division of Plastic and Reconstruction Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Yur-Ren Kuo
- Division of Plastic and Reconstruction Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; Faculty of Medicine, College of Medicine, Orthopaedic Research Center, Regenerative Medicine, and Cell Therapy Research Center; Department of Surgery, Kaohsiung Ta-Tong Municipal Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung, Taiwan; SingHealth Duke-NUS Musculoskeletal Sciences Academic Clinical Programme, Singapore.
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To HTN, Park JH, Kim JW, Kang D. Delta/Notch-like Epidermal Growth Factor-Related Receptor (DNER), a Potential Prognostic Marker of Gastric Cancer Regulates Cell Survival and Cell Cycle Progression. Int J Mol Sci 2023; 24:10077. [PMID: 37373228 DOI: 10.3390/ijms241210077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 06/05/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
Upregulation of the expression of Delta/notch-like epidermal growth factor-related receptor (DNER) and its oncogenic role have been reported in several cancers, including gastric, breast, and prostate cancers. This study aimed to investigate the oncogenic role of DNER and the mechanisms behind its oncogenic role in gastric cancer. Analysis of the RNASeq data of gastric cancer tissues obtained from the TCGA database revealed that the expression of DNER was associated with the pathology of advanced gastric cancer and the prognosis of patients. DNER expression was increased upon stem cell-enriching cancer spheroid culture. Knockdown of DNER expression inhibited cell proliferation and invasion, induced apoptosis, enhanced chemosensitivity, and decreased spheroid formation of SNU-638 gastric cancer cells. DNER silencing elevated the expression of p53, p21cip/waf, and p27, and increased G1 phase cells at the expense of S phase cells. Knockdown of p21cip/waf expression in the DNER-silenced cells partially restored cell viability and S phase progression. DNER silencing also induced the apoptosis of SNU-638 cells. While both cleaved caspases-8 and 9 were detected in adherent cells, only cleaved caspase-8 was found to have increased in spheroid-cultured cells, suggesting a distinct activation pattern of caspase activation depending on the growth condition. Knockdown of p53 expression rescued the DNER-silenced cells from apoptosis and partially restored cell viability. In contrast, overexpression of the Notch intracellular domain (NICD) decreased the expression of p53, p21cip/waf, and cleaved caspase-3 in DNER-silenced cells. Moreover, NICD expression fully reverted the cell viability reduction, arrest in the G1 phase, and elevated apoptosis caused by DNER silencing, thereby suggesting activation of Notch signaling by DNER. Expression of a membrane-unbound mutant of mDNER also decreased cell viability and induced apoptosis. On the other hand, TGF-β signals were found to be involved in DNER expression in both adherent and spheroid-cultured cells. DNER could therefore be a link connecting TGF-β signaling to Notch signaling. Taken together, DNER regulates cell proliferation, survival, and invasive capacity of the gastric cancer cells through the activation of Notch signaling, which may facilitate tumor progression into an advanced stage. This study provides evidences suggesting that DNER could be a potential prognostic marker, a therapeutic target, and a drug candidate in the form of a cell-free mutant.
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Affiliation(s)
- Han Thi Ngoc To
- Ilsong Institute of Life Science, Hallym University, Beodeunaru-ro 55, Yeongdeungpo-gu, Seoul 07247, Republic of Korea
- Department of Biomedical Gerontology, Hallym University Graduate School, Chuncheon 24252, Republic of Korea
| | - Ji-Hong Park
- Ilsong Institute of Life Science, Hallym University, Beodeunaru-ro 55, Yeongdeungpo-gu, Seoul 07247, Republic of Korea
- Department of Biomedical Gerontology, Hallym University Graduate School, Chuncheon 24252, Republic of Korea
| | - Jeong Won Kim
- Department of Pathology, Kangnam Sacred Heart Hospital, College of Medicine, Hallym University, Seoul 07441, Republic of Korea
| | - Dongchul Kang
- Ilsong Institute of Life Science, Hallym University, Beodeunaru-ro 55, Yeongdeungpo-gu, Seoul 07247, Republic of Korea
- Department of Biomedical Gerontology, Hallym University Graduate School, Chuncheon 24252, Republic of Korea
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Signaling pathways and targeted therapy for myocardial infarction. Signal Transduct Target Ther 2022; 7:78. [PMID: 35273164 PMCID: PMC8913803 DOI: 10.1038/s41392-022-00925-z] [Citation(s) in RCA: 168] [Impact Index Per Article: 84.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 01/28/2022] [Accepted: 02/08/2022] [Indexed: 02/07/2023] Open
Abstract
Although the treatment of myocardial infarction (MI) has improved considerably, it is still a worldwide disease with high morbidity and high mortality. Whilst there is still a long way to go for discovering ideal treatments, therapeutic strategies committed to cardioprotection and cardiac repair following cardiac ischemia are emerging. Evidence of pathological characteristics in MI illustrates cell signaling pathways that participate in the survival, proliferation, apoptosis, autophagy of cardiomyocytes, endothelial cells, fibroblasts, monocytes, and stem cells. These signaling pathways include the key players in inflammation response, e.g., NLRP3/caspase-1 and TLR4/MyD88/NF-κB; the crucial mediators in oxidative stress and apoptosis, for instance, Notch, Hippo/YAP, RhoA/ROCK, Nrf2/HO-1, and Sonic hedgehog; the controller of myocardial fibrosis such as TGF-β/SMADs and Wnt/β-catenin; and the main regulator of angiogenesis, PI3K/Akt, MAPK, JAK/STAT, Sonic hedgehog, etc. Since signaling pathways play an important role in administering the process of MI, aiming at targeting these aberrant signaling pathways and improving the pathological manifestations in MI is indispensable and promising. Hence, drug therapy, gene therapy, protein therapy, cell therapy, and exosome therapy have been emerging and are known as novel therapies. In this review, we summarize the therapeutic strategies for MI by regulating these associated pathways, which contribute to inhibiting cardiomyocytes death, attenuating inflammation, enhancing angiogenesis, etc. so as to repair and re-functionalize damaged hearts.
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Jha NK, Chen WC, Kumar S, Dubey R, Tsai LW, Kar R, Jha SK, Gupta PK, Sharma A, Gundamaraju R, Pant K, Mani S, Singh SK, Maccioni RB, Datta T, Singh SK, Gupta G, Prasher P, Dua K, Dey A, Sharma C, Mughal YH, Ruokolainen J, Kesari KK, Ojha S. Molecular mechanisms of developmental pathways in neurological disorders: a pharmacological and therapeutic review. Open Biol 2022; 12:210289. [PMID: 35291879 PMCID: PMC8924757 DOI: 10.1098/rsob.210289] [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] [Indexed: 01/07/2023] Open
Abstract
Developmental signalling pathways such as Wnt/β-catenin, Notch and Sonic hedgehog play a central role in nearly all the stages of neuronal development. The term 'embryonic' might appear to be a misnomer to several people because these pathways are functional during the early stages of embryonic development and adulthood, albeit to a certain degree. Therefore, any aberration in these pathways or their associated components may contribute towards a detrimental outcome in the form of neurological disorders such as Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis and stroke. In the last decade, researchers have extensively studied these pathways to decipher disease-related interactions, which can be used as therapeutic targets to improve outcomes in patients with neurological abnormalities. However, a lot remains to be understood in this domain. Nevertheless, there is strong evidence supporting the fact that embryonic signalling is indeed a crucial mechanism as is manifested by its role in driving memory loss, motor impairments and many other processes after brain trauma. In this review, we explore the key roles of three embryonic pathways in modulating a range of homeostatic processes such as maintaining blood-brain barrier integrity, mitochondrial dynamics and neuroinflammation. In addition, we extensively investigated the effect of these pathways in driving the pathophysiology of a range of disorders such as Alzheimer's, Parkinson's and diabetic neuropathy. The concluding section of the review is dedicated to neurotherapeutics, wherein we identify and list a range of biological molecules and compounds that have shown enormous potential in improving prognosis in patients with these disorders.
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Affiliation(s)
- Niraj Kumar Jha
- Department of Biotechnology, School of Engineering and Technology (SET), Sharda University, Greater Noida, Uttar Pradesh 201310, India
| | - Wei-Chih Chen
- Division of General Surgery, Department of Surgery, Taipei Medical University Hospital, Taipei 11031, Taiwan
| | - Sanjay Kumar
- Department of Life Science, School of Basic Science and Research, Sharda University, Greater Noida, Uttar Pradesh 201310, India
| | - Rajni Dubey
- Department of Medicine Research, Taipei Medical University Hospital, Taipei 11031, Taiwan
| | - Lung-Wen Tsai
- Department of Medicine Research, Taipei Medical University Hospital, Taipei 11031, Taiwan,Department of Information Technology Office, Taipei Medical University Hospital, Taipei 11031, Taiwan,Graduate Institute of Data Science, College of Management, Taipei Medical University, Taipei 110, Taiwan
| | - Rohan Kar
- Indian Institute of Management Ahmedabad (IIMA), Gujarat 380015, India
| | - Saurabh Kumar Jha
- Department of Biotechnology, School of Engineering and Technology (SET), Sharda University, Greater Noida, Uttar Pradesh 201310, India
| | - Piyush Kumar Gupta
- Department of Life Science, School of Basic Science and Research, Sharda University, Greater Noida, Uttar Pradesh 201310, India
| | - Ankur Sharma
- Department of Life Science, School of Basic Science and Research, Sharda University, Greater Noida, Uttar Pradesh 201310, India
| | - Rohit Gundamaraju
- ER Stress and Mucosal Immunology Laboratory, School of Health Sciences, University of Tasmania, Launceston, Tasmania 7248, Australia
| | - Kumud Pant
- Department of Biotechnology, Graphic Era deemed to be University Dehradun Uttarakhand, 248002 Dehradun, India
| | - Shalini Mani
- Department of Biotechnology, Jaypee Institute of Information Technology, A-10, Sector 62, Noida, Uttar Pradesh 201301, India
| | - Sandeep Kumar Singh
- Indian Scientific Education and Technology Foundation, Lucknow 226002, India
| | - Ricardo B. Maccioni
- Laboratory of Neurosciences and Functional Medicine, International Center for Biomedicine (ICC) and Faculty of Sciences, University of Chile, Santiago de Chile, Chile
| | - Tirtharaj Datta
- Department of Biotechnology, School of Engineering and Technology (SET), Sharda University, Greater Noida, Uttar Pradesh 201310, India
| | - Sachin Kumar Singh
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara 144411, Punjab, India
| | - Gaurav Gupta
- Department of Pharmacology, School of Pharmacy, Suresh Gyan Vihar University, Mahal Road, 302017 Jagatpura, Jaipur, India
| | - Parteek Prasher
- Department of Chemistry, University of Petroleum and Energy Studies, Dehradun 248007, Uttarakhand, India
| | - Kamal Dua
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, Sydney, New South Wales 2007, Australia
| | - Abhijit Dey
- Department of Life Sciences, Presidency University, 86/1 College Street, Kolkata 700073, India,Department of Applied Physics, School of Science, and
| | - Charu Sharma
- Department of Internal Medicine, College of Medicine and Health Sciences, United Arab Emirates University, PO Box 15551, Al Ain, United Arab Emirates
| | - Yasir Hayat Mughal
- Department of Health Administration, College of Public Health and Health Informatics, Qassim University, Buraidah, Saudi Arabia
| | | | - Kavindra Kumar Kesari
- Department of Applied Physics, School of Science, and,Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, Espoo 00076, Finland
| | - Shreesh Ojha
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, PO Box 15551, Al Ain, United Arab Emirates
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Chen J, Li J, Chen J, Cheng W, Lin J, Ke L, Liu G, Bai X, Zhang P. Treatment of collagen-induced arthritis rat model by using Notch signalling inhibitor. J Orthop Translat 2021; 28:100-107. [PMID: 33816113 PMCID: PMC7995347 DOI: 10.1016/j.jot.2021.01.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 11/22/2020] [Accepted: 01/15/2021] [Indexed: 12/27/2022] Open
Abstract
Background The Notch signalling pathway has been reported to play a key role in rheumatoid arthritis (RA) development. Thus, inhibition of the activation of this signalling pathway may be a promising approach to the treatment of RA. In this study, the Notch signalling inhibitor LY411575, which can inhibit both Notch1 and Notch3, was used for the treatment of collagen-induced arthritis (CIA) rats. Methods Wistar rats were immunised with bovine type II collagen (CII) to establish rats CIA model. The inhibitory effects of LY411575 on Notch1 intracellular domain (N1ICD) and Notch3 intracellular domain (N3ICD) protein was verified by western blot (WB) in vitro. CIA rats were treated with different doses of LY411575 for 15 and 28 days, respectively. Methotrexate and sodium carboxymethyl cellulose (CMC-Na) were used as positive and negative (vehicle) control respectively. Destruction of the rat ankle joint and the bone loss on the periarticular side were evaluated by micro-computed tomography (Micro-CT). In addition, destruction of the ankle articular cartilage and the osteoclast numbers were determined by histology. Expression of N1ICD and N3ICD in the ankle joint was detected by immunohistochemistry. Results LY411575 could significantly inhibit the expression of N1ICD and N3ICD in vitro. Micro-CT test showed that the ankle joint destruction significantly improved after treatment with LY411575 (5 mg/kg and 10 mg/kg, respectively). The bone quality in the LY411575 (5 mg/kg and 10 mg/kg, respectively) groups were improved compared with the vehicle group. Histological analysis showed that LY411575 (5 mg/kg and 10 mg/kg, respectively) treatment reduced the severity of ankle joint inflammation in CIA rats (including ankle joint destruction, pannus formation, and cartilage damage) and reduced the expression of N1ICD and N3ICD in CIA rats ankle joints significantly. Conclusion The inhibitor of Notch signalling LY411575 is an effective treatment for CIA. The translational potential of this article Our study provides new evidence to support the potential clinical application of Notch signalling pathway inhibitor LY411575 as a drug candidate for the treatment of RA.
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Affiliation(s)
- Jianhai Chen
- Center for Translational Medicine Research and Development, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jian Li
- Center for Translational Medicine Research and Development, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jinqing Chen
- Research Laboratory for Biomedical Optics and Molecular Imaging, Shenzhen Key Laboratory for Molecular Imaging, Guangdong Provincial Key Laboratory of Biomedical Optical Imaging Technology, CAS Key Laboratory of Health Informatics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Wenxiang Cheng
- Center for Translational Medicine Research and Development, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China
| | - Jietao Lin
- Center for Translational Medicine Research and Development, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Liqing Ke
- Center for Translational Medicine Research and Development, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China
| | - Gang Liu
- Shenzhen Hospital, University of Chinese Academy of Sciences, China
| | - Xueling Bai
- Center for Translational Medicine Research and Development, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China
| | - Peng Zhang
- Center for Translational Medicine Research and Development, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China.,University of Chinese Academy of Sciences, Beijing, 100049, China.,Shenzhen Engineering Research Center for Medical Bioactive Materials, China.,Shenzhen Hospital, University of Chinese Academy of Sciences, China
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Eom YS, Gwon AR, Kwak KM, Youn JY, Park H, Kim KW, Kim BJ. Notch1 Has an Important Role in β-Cell Mass Determination and Development of Diabetes. Diabetes Metab J 2021; 45:86-96. [PMID: 32174059 PMCID: PMC7850870 DOI: 10.4093/dmj.2019.0160] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 11/20/2019] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Notch signaling pathway plays an important role in regulating pancreatic endocrine and exocrine cell fate during pancreas development. Notch signaling is also expressed in adult pancreas. There are few studies on the effect of Notch on adult pancreas. Here, we investigated the role of Notch in islet mass and glucose homeostasis in adult pancreas using Notch1 antisense transgenic (NAS). METHODS Western blot analysis was performed for the liver of 8-week-old male NAS mice. We also conducted an intraperitoneal glucose tolerance test (IPGTT) and intraperitoneal insulin tolerance test in 8-week-old male NAS mice and male C57BL/6 mice (control). Morphologic observation of pancreatic islet and β-cell was conducted in two groups. Insulin secretion capacity in islets was measured by glucose-stimulated insulin secretion (GSIS) and perifusion. RESULTS NAS mice showed higher glucose levels and lower insulin secretion in IPGTT than the control mice. There was no significant difference in insulin resistance. Total islet and β-cell masses were decreased in NAS mice. The number of large islets (≥250 µm) decreased while that of small islets (<250 µm) increased. Reduced insulin secretion was observed in GSIS and perifusion. Neurogenin3, neurogenic differentiation, and MAF bZIP transcription factor A levels increased in NAS mice. CONCLUSION Our study provides that Notch1 inhibition decreased insulin secretion and decreased islet and β-cell masses. It is thought that Notch1 inhibition suppresses islet proliferation and induces differentiation of small islets. In conclusion, Notch signaling pathway may play an important role in β-cell mass determination and diabetes.
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Affiliation(s)
- Young Sil Eom
- Department of Internal Medicine, Gachon University Gil Medical Center, Gachon University College of Medicine, Incheon, Korea
| | - A-Ryeong Gwon
- Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Korea
| | - Kyung Min Kwak
- Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Korea
| | - Jin-Young Youn
- Institute of Clinical Medicine, Gachon University Gil Medical Center, Incheon, Korea
| | - Heekyoung Park
- Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Korea
| | - Kwang-Won Kim
- Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Korea
| | - Byung-Joon Kim
- Department of Internal Medicine, Gachon University Gil Medical Center, Gachon University College of Medicine, Incheon, Korea
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Saad MA, Eltarzy MA, Abdel Salam RM, Ahmed MAE. Liraglutide mends cognitive impairment by averting Notch signaling pathway overexpression in a rat model of polycystic ovary syndrome. Life Sci 2020; 265:118731. [PMID: 33160995 DOI: 10.1016/j.lfs.2020.118731] [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: 08/18/2020] [Revised: 10/23/2020] [Accepted: 11/04/2020] [Indexed: 01/06/2023]
Abstract
AIMS Polycystic ovary syndrome (PCOS), the rifest endocrine disorder in women, is involved in disrupting many metabolic processes. However, the impact of PCOS on cognitive deficits is still uncertain. Recently, Notch signaling pathway was identified as a key modifier in regulating the pathological process in the ovary and various neurodegenerative disorders. Liraglutide has favourable neuroprotective effects that may protect against the possible cognitive dysfunction in PCOS. MAIN METHODS PCOS was induced in rats by administrating Letrozole orally for 21 successive days. Then, Liraglutide (LIR) was administered intraperitoneally for 30 days. Memory was examined using Y-maze, novel object recognition (NOR), and Morris water maze (MWM) tests. Western blotting, enzyme immunoassay, and quantitative real-time PCR were used to examine Notch signaling downstream targets, as well as assessing the expression of the components of various pathways cross talked with Notch signaling in memory impairment. Furthermore, histopathological examination was performed to examine neuronal changes. KEY FINDINGS Notch signaling was overexpressed in PCOS rats, which increased Aβ aggregation, apoptosis, and neuroinflammation. Additionally, histopathological examination showed neuronal degeneration, which was marked by diminished acetylcholine levels in the PCOS rats' hippocampi. Finally, serum levels of insulin and testosterone were elevated while estradiol was reduced. Treatment with LIR repaired Notch signaling-attributed changes and improved the PCOS-induced memory impairment in rats. SIGNIFICANCE The obtained findings confirm that Notch signaling activation in the hippocampus of rats impairs cognitive functions in PCOS, which is mitigated by LIR. Therefore, LIR may offer a novel therapeutic intervention to impede PCOS-induced dementia.
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Affiliation(s)
- Muhammed A Saad
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt; School of Pharmacy, NewGiza University, Giza, Egypt
| | - Muhammad A Eltarzy
- Department of Pharmacology and Toxicology, Faculty of Pharmaceutical Sciences and Drug Manufacturing, Misr University for Science and Technology (MUST), 6th of October City, Giza, Egypt
| | - Rania M Abdel Salam
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt; School of Pharmacy, NewGiza University, Giza, Egypt
| | - Maha A E Ahmed
- Department of Pharmacology and Toxicology, Faculty of Pharmaceutical Sciences and Drug Manufacturing, Misr University for Science and Technology (MUST), 6th of October City, Giza, Egypt.
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Sun S, Jiang S, Wang J, Chen C, Han S, Che H. Cholera toxin induces food allergy through Th2 cell differentiation which is unaffected by Jagged2. Life Sci 2020; 263:118514. [PMID: 33010283 DOI: 10.1016/j.lfs.2020.118514] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 09/22/2020] [Accepted: 09/24/2020] [Indexed: 01/05/2023]
Abstract
AIMS Cholera toxin is often used to induce food allergies. However, its exact mode of action and effect remain ambiguous. In this study, we established a BALB/c mouse cholera toxin/ovalbumin-induced food allergy model to determine the molecular basis and signaling mechanisms of the immune regulation of cholera toxin during food allergy. MATERIALS AND METHODS The adjuvant activity of cholera toxin was analyzed by establishing mouse allergy model, and the allergic reaction of each group of mice was evaluated. The effect of cholera toxin on Th1/Th2 cell differentiation was analyzed to further explore the role of cholera toxin in allergen immune response. We stimulated bone marrow-derived dendritic cells (BMDCs) with cholera toxin in vitro to investigate the effect of cholera toxin on Notch ligand expression. BMDCs and naive CD4+T cells were co-cultured in vitro, and their cytokine levels were examined to investigate whether cholera toxin regulates Th cell differentiation via the Jagged2 Notch signaling pathway. KEY FINDINGS The results showed that in the presence of allergens, cholera toxin promotes Th2 cell differentiation and enhances the body's immune response. Cholera toxin induces expression of the Notch ligand Jagged2, but Jagged2 Notch signaling pathway is not required to promote BMDCs-mediated differentiation of Th2 cells. SIGNIFICANCE This study initially revealed the mechanism by which cholera toxin plays an adjuvant role in food allergy, and provides reference for future related research.
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Affiliation(s)
- Shanfeng Sun
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Songsong Jiang
- College of Food Science and Engineering, Yangzhou University, No.88 Daxue South Road, Hanjiang District, Yangzhou, Jiangsu Province, China
| | - Junjuan Wang
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Cheng Chen
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Shiwen Han
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Huilian Che
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China.
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Kunze B, Wein F, Fang HY, Anand A, Baumeister T, Strangmann J, Gerland S, Ingermann J, Münch NS, Wiethaler M, Sahm V, Hidalgo-Sastre A, Lange S, Lightdale CJ, Bokhari A, Falk GW, Friedman RA, Ginsberg GG, Iyer PG, Jin Z, Nakagawa H, Shawber CJ, Nguyen T, Raab WJ, Dalerba P, Rustgi AK, Sepulveda AR, Wang KK, Schmid RM, Wang TC, Abrams JA, Quante M. Notch Signaling Mediates Differentiation in Barrett's Esophagus and Promotes Progression to Adenocarcinoma. Gastroenterology 2020; 159:575-590. [PMID: 32325086 PMCID: PMC7484392 DOI: 10.1053/j.gastro.2020.04.033] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 03/19/2020] [Accepted: 04/13/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS Studies are needed to determine the mechanism by which Barrett's esophagus (BE) progresses to esophageal adenocarcinoma (EAC). Notch signaling maintains stem cells in the gastrointestinal tract and is dysregulated during carcinogenesis. We explored the relationship between Notch signaling and goblet cell maturation, a feature of BE, during EAC pathogenesis. METHODS We measured goblet cell density and levels of Notch messenger RNAs in BE tissues from 164 patients, with and without dysplasia or EAC, enrolled in a multicenter study. We analyzed the effects of conditional expression of an activated form of NOTCH2 (pL2.Lgr5.N2IC), conditional deletion of NOTCH2 (pL2.Lgr5.N2fl/fl), or loss of nuclear factor κB (NF-κB) (pL2.Lgr5.p65fl/fl), in Lgr5+ (progenitor) cells in L2-IL1B mice (which overexpress interleukin 1 beta in esophagus and squamous forestomach and are used as a model of BE). We collected esophageal and stomach tissues and performed histology, immunohistochemistry, flow cytometry, transcriptome, and real-time polymerase chain reaction analyses. Cardia and forestomach tissues from mice were cultured as organoids and incubated with inhibitors of Notch or NF-kB. RESULTS Progression of BE to EAC was associated with a significant reduction in goblet cell density comparing nondysplastic regions of tissues from patients; there was an inverse correlation between goblet cell density and levels of NOTCH3 and JAG2 messenger RNA. In mice, expression of the activated intracellular form of NOTCH2 in Lgr5+ cells reduced goblet-like cell maturation, increased crypt fission, and accelerated the development of tumors in the squamocolumnar junction. Mice with deletion of NOTCH2 from Lgr5+ cells had increased maturation of goblet-like cells, reduced crypt fission, and developed fewer tumors. Esophageal tissues from in pL2.Lgr5.N2IC mice had increased levels of RelA (which encodes the p65 unit of NF-κB) compared to tissues from L2-IL1B mice, and we found evidence of increased NF-κB activity in Lgr5+ cells. Esophageal tissues from pL2.Lgr5.p65fl/fl mice had lower inflammation and metaplasia scores than pL2.Lgr5.N2IC mice. In organoids derived from pL2-IL1B mice, the NF-κB inhibitor JSH-23 reduced cell survival and proliferation. CONCLUSIONS Notch signaling contributes to activation of NF-κB and regulates differentiation of gastric cardia progenitor cells in a mouse model of BE. In human esophageal tissues, progression of BE to EAC was associated with reduced goblet cell density and increased levels of Notch expression. Strategies to block this pathway might be developed to prevent EAC in patients with BE.
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Affiliation(s)
- Bettina Kunze
- II. Medizinische Klinik, Technische Universitat München, Munich, Germany
| | - Frederik Wein
- II. Medizinische Klinik, Technische Universitat München, Munich, Germany
| | - Hsin-Yu Fang
- II. Medizinische Klinik, Technische Universitat München, Munich, Germany
| | - Akanksha Anand
- II. Medizinische Klinik, Technische Universitat München, Munich, Germany
| | - Theresa Baumeister
- II. Medizinische Klinik, Technische Universitat München, Munich, Germany
| | - Julia Strangmann
- II. Medizinische Klinik, Technische Universitat München, Munich, Germany
| | - Sophie Gerland
- II. Medizinische Klinik, Technische Universitat München, Munich, Germany
| | - Jonas Ingermann
- II. Medizinische Klinik, Technische Universitat München, Munich, Germany
| | | | - Maria Wiethaler
- II. Medizinische Klinik, Technische Universitat München, Munich, Germany
| | - Vincenz Sahm
- II. Medizinische Klinik, Technische Universitat München, Munich, Germany
| | - Ana Hidalgo-Sastre
- II. Medizinische Klinik, Technische Universitat München, Munich, Germany
| | - Sebastian Lange
- II. Medizinische Klinik, Technische Universitat München, Munich, Germany
| | - Charles J Lightdale
- Department of Medicine, Columbia University Irving Medical Center, New York, New York
| | - Aqiba Bokhari
- Yosemite Pathology Medical Group, Modesto, California
| | - Gary W Falk
- Department of Medicine, Division of Gastroenterology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Richard A Friedman
- Department of Biomedical Informatics, Columbia University Irving Medical Center, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University, New York, New York
| | - Gregory G Ginsberg
- Department of Medicine, Division of Gastroenterology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Prasad G Iyer
- Department of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota
| | - Zhezhen Jin
- Department of Biostatistics, Columbia University Mailman School of Public Health, New York, New York
| | - Hiroshi Nakagawa
- Department of Medicine, Columbia University Irving Medical Center, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University, New York, New York
| | - Carrie J Shawber
- Department of Obstetrics and Gynecology, Columbia University Irving Medical Center, New York, New York
| | - TheAnh Nguyen
- Oregon Health and Science University, Portland, Oregon
| | - William J Raab
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York
| | - Piero Dalerba
- Department of Medicine, Columbia University Irving Medical Center, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University, New York, New York; Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York; Columbia Stem Cell Initiative, Columbia University Irving Medical Center, New York, New York
| | - Anil K Rustgi
- Department of Medicine, Columbia University Irving Medical Center, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University, New York, New York
| | - Antonia R Sepulveda
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York
| | - Kenneth K Wang
- Department of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota
| | - Roland M Schmid
- II. Medizinische Klinik, Technische Universitat München, Munich, Germany
| | - Timothy C Wang
- Department of Medicine, Columbia University Irving Medical Center, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University, New York, New York
| | - Julian A Abrams
- Department of Medicine, Columbia University Irving Medical Center, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University, New York, New York.
| | - Michael Quante
- II. Medizinische Klinik, Technische Universitat München, Munich, Germany.
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10
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Moore G, Annett S, McClements L, Robson T. Top Notch Targeting Strategies in Cancer: A Detailed Overview of Recent Insights and Current Perspectives. Cells 2020; 9:cells9061503. [PMID: 32575680 PMCID: PMC7349363 DOI: 10.3390/cells9061503] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/05/2020] [Accepted: 06/11/2020] [Indexed: 12/17/2022] Open
Abstract
Evolutionarily conserved Notch plays a critical role in embryonic development and cellular self-renewal. It has both tumour suppressor and oncogenic activity, the latter of which is widely described. Notch-activating mutations are associated with haematological malignancies and several solid tumours including breast, lung and adenoid cystic carcinoma. Moreover, upregulation of Notch receptors and ligands and aberrant Notch signalling is frequently observed in cancer. It is involved in cancer hallmarks including proliferation, survival, migration, angiogenesis, cancer stem cell renewal, metastasis and drug resistance. It is a key component of cell-to-cell interactions between cancer cells and cells of the tumour microenvironment, such as endothelial cells, immune cells and fibroblasts. Notch displays diverse crosstalk with many other oncogenic signalling pathways, and may drive acquired resistance to targeted therapies as well as resistance to standard chemo/radiation therapy. The past 10 years have seen the emergence of different classes of drugs therapeutically targeting Notch including receptor/ligand antibodies, gamma secretase inhibitors (GSI) and most recently, the development of Notch transcription complex inhibitors. It is an exciting time for Notch research with over 70 cancer clinical trials registered and the first-ever Phase III trial of a Notch GSI, nirogacestat, currently at the recruitment stage.
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Affiliation(s)
- Gillian Moore
- School of Pharmacy and Biomolecular Sciences, Irish Centre for Vascular Biology, Royal College of Surgeons, D02 YN77 Dublin, Ireland; (G.M.); (S.A.)
| | - Stephanie Annett
- School of Pharmacy and Biomolecular Sciences, Irish Centre for Vascular Biology, Royal College of Surgeons, D02 YN77 Dublin, Ireland; (G.M.); (S.A.)
| | - Lana McClements
- The School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW 2007, Australia;
| | - Tracy Robson
- School of Pharmacy and Biomolecular Sciences, Irish Centre for Vascular Biology, Royal College of Surgeons, D02 YN77 Dublin, Ireland; (G.M.); (S.A.)
- Correspondence:
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11
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Šućur A, Filipović M, Flegar D, Kelava T, Šisl D, Lukač N, Kovačić N, Grčević D. Notch receptors and ligands in inflammatory arthritis - a systematic review. Immunol Lett 2020; 223:106-114. [PMID: 32325090 DOI: 10.1016/j.imlet.2020.04.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 04/07/2020] [Accepted: 04/18/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Notch pathway is highly conserved across species and is involved in the regulation of cell differentiation and activity both in embryonic development and adult life. Notch signaling has an important role in the development of hematopoietic stem cells and their differentiation to committed lineages, as well as in the regulation of several non-hematopoietic cell lines. OBJECTIVE As Notch signaling has been implicated in various inflammatory and autoimmune diseases, it is of interest to elucidate what role do Notch receptors and ligands have in inflammatory arthritides. METHODS We performed a search on the role of Notch receptors (1-4) and Notch ligands Delta-like (DLL) 1, 3, 4 and Jagged (Jag) 1 and 2 in animal models of inflammatory arthritis and most common types of human inflammatory arthritis (rheumatoid arthritis, psoriatic arthritis or ankylosing spondylitis). The initial search identified 135 unique articles, of which 24 were ultimately deemed relevant and included in this systematic review. RESULTS Overall, identified articles describe roles for Notch ligands and receptors in inflammatory arthritis, with Notch activation resulting in enhanced Th1/17 polarization, osteoclast differentiation, macrophage activation and fibroblast-like synoviocyte proliferation. However, the inhibitory role of Notch signaling, especially by Jag1 is also described. CONCLUSION There is evidence that Notch pathway activation affects multiple cell lineages present within the arthritic environment, therefore potentially acting as one of the drivers of disease pathogenesis. Since cell lineage-selective transgenic mouse models and specific Notch receptor inhibitors are becoming increasingly available, it can be expected that future research will evaluate whether Notch signaling components initiate crucial pathogenic impulses and, therefore, present viable therapeutic targets in inflammatory arthritis.
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Affiliation(s)
- Alan Šućur
- Laboratory for Molecular Immunology, Croatian Institute for Brain Research, University of Zagreb School of Medicine, Šalata 12, Zagreb, HR 10000, Croatia; Department of Physiology and Immunology, University of Zagreb School of Medicine, Šalata 3, Zagreb, HR 10000, Croatia
| | - Maša Filipović
- Laboratory for Molecular Immunology, Croatian Institute for Brain Research, University of Zagreb School of Medicine, Šalata 12, Zagreb, HR 10000, Croatia; Department of Physiology and Immunology, University of Zagreb School of Medicine, Šalata 3, Zagreb, HR 10000, Croatia
| | - Darja Flegar
- Laboratory for Molecular Immunology, Croatian Institute for Brain Research, University of Zagreb School of Medicine, Šalata 12, Zagreb, HR 10000, Croatia; Department of Physiology and Immunology, University of Zagreb School of Medicine, Šalata 3, Zagreb, HR 10000, Croatia
| | - Tomislav Kelava
- Laboratory for Molecular Immunology, Croatian Institute for Brain Research, University of Zagreb School of Medicine, Šalata 12, Zagreb, HR 10000, Croatia; Department of Physiology and Immunology, University of Zagreb School of Medicine, Šalata 3, Zagreb, HR 10000, Croatia
| | - Dino Šisl
- Laboratory for Molecular Immunology, Croatian Institute for Brain Research, University of Zagreb School of Medicine, Šalata 12, Zagreb, HR 10000, Croatia; Department of Physiology and Immunology, University of Zagreb School of Medicine, Šalata 3, Zagreb, HR 10000, Croatia
| | - Nina Lukač
- Laboratory for Molecular Immunology, Croatian Institute for Brain Research, University of Zagreb School of Medicine, Šalata 12, Zagreb, HR 10000, Croatia; Department of Anatomy, University of Zagreb School of Medicine, Šalata 11, Zagreb, HR 10000, Croatia
| | - Nataša Kovačić
- Laboratory for Molecular Immunology, Croatian Institute for Brain Research, University of Zagreb School of Medicine, Šalata 12, Zagreb, HR 10000, Croatia; Department of Anatomy, University of Zagreb School of Medicine, Šalata 11, Zagreb, HR 10000, Croatia
| | - Danka Grčević
- Laboratory for Molecular Immunology, Croatian Institute for Brain Research, University of Zagreb School of Medicine, Šalata 12, Zagreb, HR 10000, Croatia.
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12
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Tsaouli G, Barbarulo A, Vacca A, Screpanti I, Felli MP. Molecular Mechanisms of Notch Signaling in Lymphoid Cell Lineages Development: NF-κB and Beyond. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1227:145-164. [PMID: 32072504 DOI: 10.1007/978-3-030-36422-9_10] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Notch is a ligand-receptor interaction-triggered signaling cascade highly conserved, that influences multiple lineage decisions within the hematopoietic and the immune system. It is a recognized model of intercellular communication that plays an essential role in embryonic as well as in adult immune cell development and homeostasis. Four members belong to the family of Notch receptors (Notch1-4), and each of them plays nonredundant functions at several developmental stages. Canonical and noncanonical pathways of Notch signaling are multifaceted drivers of immune cells biology. In fact, increasing evidence highlighted Notch as an important modulator of immune responses, also in cancer microenvironment. In these contexts, multiple transduction signals, including canonical and alternative NF-κB pathways, play a relevant role. In this chapter, we will first describe the critical role of Notch and NF-κB signals in lymphoid lineages developing in thymus: natural killer T cells, thymocytes, and thymic T regulatory cells. We will address also the role played by ligand expressing cells. Given the importance of Notch/NF-κB cross talk, its role in T-cell leukemia development and progression will be discussed.
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Affiliation(s)
- G Tsaouli
- Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - A Barbarulo
- Department of Immunology, Institute of Immunity and Transplantation, Royal Free Hospital, London, UK
| | - A Vacca
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - I Screpanti
- Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy.
| | - M P Felli
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy.
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13
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Wan X, Chowdhury IH, Jie Z, Choudhuri S, Garg NJ. Origin of Monocytes/Macrophages Contributing to Chronic Inflammation in Chagas Disease: SIRT1 Inhibition of FAK-NFκB-Dependent Proliferation and Proinflammatory Activation of Macrophages. Cells 2019; 9:E80. [PMID: 31905606 PMCID: PMC7017093 DOI: 10.3390/cells9010080] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 12/16/2019] [Accepted: 12/20/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Trypanosoma cruzi (Tc) causes Chagas disease (CD) that is the most frequent cause of heart failure in Latin America. TNF-α+ monocytes/macrophages (Mo/Mφ) are associated with inflammatory pathology in chronic CD. In this study, we determined the progenitor lineage of Mo/Mφ contributing to inflammation and examined the regulatory role of SIRT1 in modulating the Mo/Mφ response in Chagas disease. METHODS AND RESULTS C57BL/6 mice were infected with Tc, treated with SIRT1 agonist (SRT1720) after control of acute parasitemia, and monitored during chronic phase (150 days post-infection). Flow cytometry studies showed an increase in maturation of bone marrow hematopoietic stem cell (HSC)-derived Mo of proinflammatory and anti-inflammatory phenotype in acutely- and chronically-infected mice; however, these cells were not increased in splenic compartment of infected mice. Instead, yolk-sac-derived CD11b+ F4/80+ Mo/Mφ were increased in sinusoidal compartment of Chagas mice. The splenic CD11b+ F4/80+ Mo/Mφ of Chagas (vs. control) mice exhibited increased mRNA, protein, and surface expression of markers of proinflammatory phenotype (CD80+/CD64+ > CD200+/CD206+) associated with proinflammatory cytokines response (IL-6+TNF-α >> Arg-1+IL-10), and these were also detected in the myocardium of chronically infected mice. Infected mice treated with SRT1720 (vs. infected/untreated) exhibited decreased splenic expansion and myocardial infiltration of proinflammatory Mo/Mφ. SRT1720 did not alter the inherent capability of splenic Mo/Mφ of Chagas mice to respond to pathogen stimulus. Instead, SRT1720 dampened the Tc-induced increase in the expression and/or phosphorylation of focal adhesion kinase (FAK) and downstream transcription factors (Pu.1, c-Myb, and Runx1) involved in Mφ proliferation and migration and Notch1 involved in functional activation. Studies in cultured Mφ confirmed the agonistic effects of SIRT1 in controlling the Tc-induced, FAK-dependent increase in the expression of transcription factors and showed that SIRT1 agonist and FAK inhibitor abrogated the NF-κB transcriptional activity and inflammatory cytokine gene expression in Tc-infected Mφ. CONCLUSIONS The proinflammatory Mo/Mφ of yolk sac origin drive the splenic and tissue inflammatory response in chronic CD. SRT1720 reprogrammed the Tc-induced FAK-dependent transcription factors involved in Mφ proliferation and proinflammatory activation in Chagas disease.
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Affiliation(s)
- Xianxiu Wan
- Department of Microbiology and Immunology, University of Texas Medical Branch (UTMB), Galveston, TX 77550, USA; (X.W.); (I.H.C.); (Z.J.); (S.C.)
| | - Imran Hussain Chowdhury
- Department of Microbiology and Immunology, University of Texas Medical Branch (UTMB), Galveston, TX 77550, USA; (X.W.); (I.H.C.); (Z.J.); (S.C.)
| | - Zuliang Jie
- Department of Microbiology and Immunology, University of Texas Medical Branch (UTMB), Galveston, TX 77550, USA; (X.W.); (I.H.C.); (Z.J.); (S.C.)
| | - Subhadip Choudhuri
- Department of Microbiology and Immunology, University of Texas Medical Branch (UTMB), Galveston, TX 77550, USA; (X.W.); (I.H.C.); (Z.J.); (S.C.)
| | - Nisha Jain Garg
- Department of Microbiology and Immunology, University of Texas Medical Branch (UTMB), Galveston, TX 77550, USA; (X.W.); (I.H.C.); (Z.J.); (S.C.)
- Institute for Human Infections and Immunity, UTMB, Galveston, TX 77550, USA
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14
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Virzì A, Roca Suarez AA, Baumert TF, Lupberger J. Oncogenic Signaling Induced by HCV Infection. Viruses 2018; 10:v10100538. [PMID: 30279347 PMCID: PMC6212953 DOI: 10.3390/v10100538] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 09/29/2018] [Accepted: 09/30/2018] [Indexed: 02/07/2023] Open
Abstract
The liver is frequently exposed to toxins, metabolites, and oxidative stress, which can challenge organ function and genomic stability. Liver regeneration is therefore a highly regulated process involving several sequential signaling events. It is thus not surprising that individual oncogenic mutations in hepatocytes do not necessarily lead to cancer and that the genetic profiles of hepatocellular carcinomas (HCCs) are highly heterogeneous. Long-term infection with hepatitis C virus (HCV) creates an oncogenic environment by a combination of viral protein expression, persistent liver inflammation, oxidative stress, and chronically deregulated signaling events that cumulate as a tipping point for genetic stability. Although novel direct-acting antivirals (DAA)-based treatments efficiently eradicate HCV, the associated HCC risk cannot be fully eliminated by viral cure in patients with advanced liver disease. This suggests that HCV may persistently deregulate signaling pathways beyond viral cure and thereby continue to perturb cancer-relevant gene function. In this review, we summarize the current knowledge about oncogenic signaling pathways derailed by chronic HCV infection. This will not only help to understand the mechanisms of hepatocarcinogenesis but will also highlight potential chemopreventive strategies to help patients with a high-risk profile of developing HCC.
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Affiliation(s)
- Alessia Virzì
- Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, 67000 Strasbourg, France.
- Université de Strasbourg, 67000 Strasbourg, France.
| | - Armando Andres Roca Suarez
- Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, 67000 Strasbourg, France.
- Université de Strasbourg, 67000 Strasbourg, France.
| | - Thomas F Baumert
- Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, 67000 Strasbourg, France.
- Université de Strasbourg, 67000 Strasbourg, France.
- Pôle Hépato-digestif, Institut Hospitalo-universitaire, Hôpitaux Universitaires de Strasbourg, 67000 Strasbourg, France.
| | - Joachim Lupberger
- Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, 67000 Strasbourg, France.
- Université de Strasbourg, 67000 Strasbourg, France.
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15
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Balaganapathy P, Baik SH, Mallilankaraman K, Sobey CG, Jo DG, Arumugam TV. Interplay between Notch and p53 promotes neuronal cell death in ischemic stroke. J Cereb Blood Flow Metab 2018; 38:1781-1795. [PMID: 28617078 PMCID: PMC6168918 DOI: 10.1177/0271678x17715956] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Stroke is the world's second leading cause of mortality, with a high incidence of morbidity. Numerous neuronal membrane receptors are activated by endogenous ligands and may contribute to infarct development. Notch is a well-characterized membrane receptor involved in cell differentiation and proliferation, and now shown to play a pivotal role in cell death during ischemic stroke. Blockade of Notch signaling by inhibition of γ-secretase, an enzyme that generates the active form of Notch, is neuroprotective following stroke. We have also identified that Pin1, a peptidyl-prolyl isomerase that regulates p53 transactivation under stress, promotes the pathogenesis of ischemic stroke via Notch signaling. Moreover, Notch can also mediate cell death through a p53-dependent pathway, resulting in apoptosis of neural progenitor cells. The current study has investigated the interplay between Notch and p53 under ischemic stroke conditions. Using pharmacological inhibitors, we have demonstrated that a Notch intracellular domain (NICD)/p53 interaction is involved in transcriptional regulation of genes downstream of p53 and NICD to modify stroke severity. Furthermore, the NICD/p53 interaction confers stability to p53 by rescuing it from ubiquitination. Together, these results indicate that Notch contributes to the pathogenesis of ischemic stroke by promoting p53 stability and signaling.
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Affiliation(s)
- Priyanka Balaganapathy
- 1 Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore, Singapore
| | - Sang-Ha Baik
- 1 Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore, Singapore.,2 School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Karthik Mallilankaraman
- 1 Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore, Singapore
| | - Christopher G Sobey
- 3 Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Victoria, Australia
| | - Dong-Gyu Jo
- 2 School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Thiruma V Arumugam
- 1 Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore, Singapore.,2 School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea.,4 Neurobiology/Ageing Programme, Life Sciences Institute, National University of Singapore, Singapore, Singapore
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16
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Choi BY, Choi Y, Park JS, Kang LJ, Baek SH, Park JS, Bahn G, Cho Y, Kim HK, Han J, Sul JH, Baik SH, Hyun DH, Arumugam TV, Yang S, Han JW, Kang YM, Cho YW, Park JH, Jo DG. Inhibition of Notch1 induces population and suppressive activity of regulatory T cell in inflammatory arthritis. Am J Cancer Res 2018; 8:4795-4804. [PMID: 30279738 PMCID: PMC6160763 DOI: 10.7150/thno.26093] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 07/27/2018] [Indexed: 12/14/2022] Open
Abstract
Inhibition of Notch signalling has shown anti-inflammatory properties in vivo and in vitro models of rheumatoid arthritis (RA). The objective of this study was to determine whether Notch1 might play a role in regulating T-regulatory cells (Tregs) in animal models of RA. Methods: Collagen-induced arthritis (CIA) and collagen antibody-induced arthritis (CAIA) were induced in C57BL/6, Notch1 antisense transgenic (NAS) or DBA1/J mice. We examined whether pharmacological inhibitors of γ-secretase (an enzyme required for Notch1 activation) and antisense-mediated knockdown of Notch1 could attenuate the severity of inflammatory arthritis in CIA and CAIA mice. Proportions of CD4+CD25+Foxp3+ Treg cells were measured by flow cytometry. To assess the suppressive capacity of Treg toward responder cells, CFSE-based suppression assay of Treg was performed. Results: γ-secretase inhibitors and antisense-mediated knockdown of Notch1 reduced the severity of inflammatory arthritis in both CIA and CAIA mice. Pharmacological and genetic inhibition of Notch1 signalling induced significant elevation of Treg cell population in CIA and CAIA mice. We also demonstrated that inhibition of Notch signalling suppressed the progression of inflammatory arthritis through modulating the expansion and suppressive function of regulatory T (Treg) cells. Conclusion: Pharmacological and genetic inhibition of Notch1 signalling suppresses the progression of inflammatory arthritis through modulating the population and suppressive function of Treg cells in animal models of RA.
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17
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Hossain F, Majumder S, Ucar DA, Rodriguez PC, Golde TE, Minter LM, Osborne BA, Miele L. Notch Signaling in Myeloid Cells as a Regulator of Tumor Immune Responses. Front Immunol 2018; 9:1288. [PMID: 29915603 PMCID: PMC5994797 DOI: 10.3389/fimmu.2018.01288] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Accepted: 05/22/2018] [Indexed: 12/14/2022] Open
Abstract
Cancer immunotherapy, which stimulates or augments host immune responses to treat malignancies, is the latest development in the rapidly advancing field of cancer immunology. The basic principles of immunotherapies are either to enhance the functions of specific components of the immune system or to neutralize immune-suppressive signals produced by cancer cells or tumor microenvironment cells. When successful, these approaches translate into long-term survival for patients. However, durable responses are only seen in a subset of patients and so far, only in some cancer types. As for other cancer treatments, resistance to immunotherapy can also develop. Numerous research groups are trying to understand why immunotherapy is effective in some patients but not others and to develop strategies to enhance the effectiveness of immunotherapy. The Notch signaling pathway is involved in many aspects of tumor biology, from angiogenesis to cancer stem cell maintenance to tumor immunity. The role of Notch in the development and modulation of the immune response is complex, involving an intricate crosstalk between antigen-presenting cells, T-cell subpopulations, cancer cells, and other components of the tumor microenvironment. Elegant studies have shown that Notch is a central mediator of tumor-induced T-cell anergy and that activation of Notch1 in CD8 T-cells enhances cancer immunotherapy. Tumor-infiltrating myeloid cells, including myeloid-derived suppressor cells, altered dendritic cells, and tumor-associated macrophages along with regulatory T cells, are major obstacles to the development of successful cancer immunotherapies. In this article, we focus on the roles of Notch signaling in modulating tumor-infiltrating myeloid cells and discuss implications for therapeutic strategies that modulate Notch signaling to enhance cancer immunotherapy.
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Affiliation(s)
- Fokhrul Hossain
- Department of Genetics, Louisiana State University Health Sciences Center, New Orleans, LA, United States.,Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, United States
| | - Samarpan Majumder
- Department of Genetics, Louisiana State University Health Sciences Center, New Orleans, LA, United States.,Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, United States
| | - Deniz A Ucar
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, United States
| | - Paulo C Rodriguez
- H. Lee Moffitt Comprehensive Cancer Center, Tampa, FL, United States
| | - Todd E Golde
- Department of Neurosciences, McKnight Brain Institute, University of Florida at Gainesville, Gainesville, FL, United States
| | - Lisa M Minter
- Department of Veterinary and Animal Sciences, University of Massachusetts, Amherst, MA, United States
| | - Barbara A Osborne
- Department of Veterinary and Animal Sciences, University of Massachusetts, Amherst, MA, United States
| | - Lucio Miele
- Department of Genetics, Louisiana State University Health Sciences Center, New Orleans, LA, United States.,Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA, United States
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18
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Notch signaling and neuronal death in stroke. Prog Neurobiol 2018; 165-167:103-116. [PMID: 29574014 DOI: 10.1016/j.pneurobio.2018.03.002] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 02/08/2018] [Accepted: 03/20/2018] [Indexed: 12/18/2022]
Abstract
Ischemic stroke is a leading cause of morbidity and death, with the outcome largely determined by the amount of hypoxia-related neuronal death in the affected brain regions. Cerebral ischemia and hypoxia activate the Notch1 signaling pathway and four prominent interacting pathways (NF-κB, p53, HIF-1α and Pin1) that converge on a conserved DNA-associated nuclear multi-protein complex, which controls the expression of genes that can determine the fate of neurons. When neurons experience a moderate level of ischemic insult, the nuclear multi-protein complex up-regulates adaptive stress response genes encoding proteins that promote neuronal survival, but when ischemia is more severe the nuclear multi-protein complex induces genes encoding proteins that trigger and execute a neuronal death program. We propose that the nuclear multi-protein transcriptional complex is a molecular mediator of neuronal hormesis and a target for therapeutic intervention in stroke.
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Ni MM, Wang YR, Wu WW, Xia CC, Zhang YH, Xu J, Xu T, Li J. Novel Insights on Notch signaling pathways in liver fibrosis. Eur J Pharmacol 2018; 826:66-74. [PMID: 29501868 DOI: 10.1016/j.ejphar.2018.02.051] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 02/27/2018] [Accepted: 02/28/2018] [Indexed: 12/11/2022]
Abstract
Liver fibrosis is characterized by an increased and altered deposition of extracellular matrix (ECM) proteins that make up excessive tissue scarring and promote chronic liver injury. Activation of hepatic stellate cells (HSCs) is a pivotal cellular event in the progression of liver fibrosis. However, the mechanisms involved in the development of liver fibrosis are only now beginning to be unveiled. The Notch pathway is a fundamental and highly conserved pathway able to control cell-fate, including cell proliferation, differentiation, apoptosis, regeneration and other cellular activities. Recently, the deregulation of Notch cascade has been found involved in many pathological processes, including liver fibrosis. These data give evidence for a role for Notch signaling in liver fibrosis. In addition,more and more date are available on the role of Notch pathways in the process. Therefore, this review focuses on the current knowledge about the Notch signaling pathway, which dramatically takes part in HSC activation and liver fibrosis, and look ahead on new perspectives of Notch signaling pathway research. Furthermore, we will summarize this new evidence on the different interactions in Notch signaling pathway-regulated liver fibrosis, and support the potentiality of putative biomarkers and unique therapeutic targets.
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Affiliation(s)
- Ming-Ming Ni
- Department of Pharmacy, Children's Hospital of Nanjing Medical University, No.72 Guangzhou Road, Nanjing 210001,China
| | - Ya-Rui Wang
- TCM Research Institution, Nanjing Municipal Hospital of T.C.M, The Third Affiliated Hospital of Nanjing University of T.C.M, Nanjing 210001,China
| | - Wen-Wen Wu
- Department of Pharmacy, Children's Hospital of Nanjing Medical University, No.72 Guangzhou Road, Nanjing 210001,China
| | - Chong-Cai Xia
- TCM Research Institution, Nanjing Municipal Hospital of T.C.M, The Third Affiliated Hospital of Nanjing University of T.C.M, Nanjing 210001,China
| | - Yi-He Zhang
- Department of Pharmacy, Children's Hospital of Nanjing Medical University, No.72 Guangzhou Road, Nanjing 210001,China
| | - Jing Xu
- Department of Pharmacy, Children's Hospital of Nanjing Medical University, No.72 Guangzhou Road, Nanjing 210001,China.
| | - Tao Xu
- Institute for Liver Diseases of Anhui Medical University(AMU), Anhui Medical University, Hefei 230032, Anhui Province, China
| | - Jun Li
- Institute for Liver Diseases of Anhui Medical University(AMU), Anhui Medical University, Hefei 230032, Anhui Province, China
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20
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Lemes SF, de Souza ACP, Payolla TB, Versutti MD, de Fátima da Silva Ramalho A, Mendes-da-Silva C, Souza CM, Milanski M, Torsoni AS, Torsoni MA. Maternal Consumption of High-fat Diet in Mice Alters Hypothalamic Notch Pathway, NPY Cell Population and Food Intake in Offspring. Neuroscience 2018; 371:1-15. [DOI: 10.1016/j.neuroscience.2017.11.043] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Revised: 11/15/2017] [Accepted: 11/24/2017] [Indexed: 01/03/2023]
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21
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Raafat A, Bargo S, McCurdy D, Callahan R. The ANK repeats of Notch-4/Int3 activate NF-κB canonical pathway in the absence of Rbpj and causes mammary tumorigenesis. Sci Rep 2017; 7:13690. [PMID: 29057904 PMCID: PMC5651869 DOI: 10.1038/s41598-017-13989-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 09/25/2017] [Indexed: 01/14/2023] Open
Abstract
Transgenic mice expressing the Notch-4 intracellular domain (designated Int3) in the mammary gland have two phenotypes exhibited with 100% penetrance: arrest of mammary alveolar/lobular development and mammary tumorigenesis. Notch-4 signaling is mediated primarily through the interaction of Int3 with the transcription repressor/activator Rbpj. Interestingly, WAP-Int3/Rbpj knockout mice have normal mammary gland development but still developed mammary tumors with a slightly longer latency than the WAP-Int3 mice. Thus, Notch-induced mammary tumor development is Rbpj-independent. Here, we show that Int3 activates NF-κB in HC11 cells in absence of Rbpj through an association with the IKK signalosome. Int3 induced the canonical NF-κB activity and P50 phosphorylation in HC11 cells without altering the NF-κB2 pathway. The minimal domain within the Int3 protein required to activate NF-κB consists of the CDC10/Ankyrin (ANK) repeats domain. Treatment of WAP-Int3 tumor bearing mice with an IKK inhibitor resulted in tumor regression. In a soft agar assay, treatment of HC11-Int3 cells with P50-siRNA caused a significant decrease in colony formation. In addition, Wap-Int3/P50 knockout mice did not develop mammary tumors. This data indicates that the activation of NF-κB canonical signaling by Notch-4/Int3 is ANK repeats dependent, Rbpj-independent, and is mediated by IKK activation and P50 phosphorylation causing mammary tumorigenesis.
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Affiliation(s)
- Ahmed Raafat
- Basic Research Laboratory, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20814, USA.
| | - Sharon Bargo
- Basic Research Laboratory, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20814, USA
| | - David McCurdy
- Basic Research Laboratory, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20814, USA
| | - Robert Callahan
- Basic Research Laboratory, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20814, USA
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22
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The role of Notch signaling in gastric carcinoma: molecular pathogenesis and novel therapeutic targets. Oncotarget 2017; 8:53839-53853. [PMID: 28881855 PMCID: PMC5581154 DOI: 10.18632/oncotarget.17809] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 04/17/2017] [Indexed: 12/14/2022] Open
Abstract
Notch signaling, an evolutionarily conserved signaling cascade system, is involved in promoting the progression of different types of cancers. Within the past decades, the Notch signaling pathway has increasingly been shown to have a primary role in deciding the fate of cancer cells and cancer stem cells in the stomach. Most components of Notch signaling are strongly expressed at different levels in gastric carcinoma tissue samples and are associated with a considerable number of clinical parameters. Moreover, crosstalk signaling between the Notch pathway and the Wnt, Ras, and NF-κB pathways promotes the process of gastric carcinogenesis. Consequently, this increases proliferation and prevents apoptosis in gastric cancer cells, and it contributes to the induction of angiogenesis and accelerates the progression of the epithelial-to-mesenchymal transition. Although the Notch signaling pathway presents novel therapeutic targets for cancer therapeutic intervention, there is still a dearth of in-depth understanding of the molecular mechanisms of Notch signaling in gastric carcinoma. In this review, we summarize the landscape of the Notch signaling pathway and recent findings on Notch signaling in gastric cancer. Furthermore, advanced studies and clinical treatments targeting the Notch signaling pathway arediscussed.
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23
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Bone marrow mesenchymal stem cells inhibit dendritic cells differentiation and maturation by microRNA-23b. Biosci Rep 2017; 37:BSR20160436. [PMID: 28096318 PMCID: PMC5398252 DOI: 10.1042/bsr20160436] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 12/23/2016] [Accepted: 01/17/2017] [Indexed: 12/20/2022] Open
Abstract
Research on regulation and its mechanism of bone marrow mesenchymal stem cells (BMSCs) on dendritic cells (DCs), which is the initiating factor in immune response has applicable clinical value. Although BMSCs have a significant regulatory effect on the maturation of DCs, its molecular mechanism is still unclear. BMSCs and DCs, were co-cultured by different concentration ratios. Flow cytometry was used to detect the expression of DC markers (CD83, CD11c). Quantitative reverse transcription PCR (qRT-PCR) was used to measure the expression of related genes in RNA level. Expression of the target proteins was detected with using Western blot assay. miRNA inhibitor and miRNA mimic were used to suppress and up-regulate the expression of the target gene. In this research, our results demonstrated that BMSCs notably inhibited maturation of DCs in the co-culture system of BMSCs and DCs and confirmed that this inhibition is due to overexpression of miR-23b. Furthermore, this research found that miR-23b overexpression inhibited the expression of p50/p65, thus blocked the activation of the NF-κB pathway. In conclusion, BMSCs affected the activation of NF-κB pathway through miR-23b overexpression resulting in inhibition of the maturation and differentiation of DCs.
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24
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Fujiwara T, Zhou J, Ye S, Zhao H. RNA-binding protein Musashi2 induced by RANKL is critical for osteoclast survival. Cell Death Dis 2016; 7:e2300. [PMID: 27441652 PMCID: PMC4973353 DOI: 10.1038/cddis.2016.213] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 05/12/2016] [Accepted: 06/20/2016] [Indexed: 01/29/2023]
Abstract
The Musashi family of RNA-binding proteins, Musashi1 and Musashi2, regulate self-renewal and differentiation of neuronal and hematopoietic stem cells by modulating protein translation. It has been recently reported that Musashi2, not Musashi1, regulates hematopoietic stem cells. Although osteoclasts are derived from hematopoietic cells, the expression and functions of Musashi proteins in osteoclast lineage cells remain unknown. In this study, we have uncovered that Musashi2 is the predominant isoform of Musashi proteins in osteoclast precursors and its expression is upregulated by receptor activator of NF-κB ligand (RANKL) during osteoclast differentiation. Knocking down the expression of Musashi2 in osteoclast lineage cells by shRNAs attenuates nuclear factor of activated T cells 1 (NFATc1) expression and osteoclast formation in vitro. Mechanistically, loss of Musashi2 inhibits Notch signaling during osteoclast differentiation and induces apoptosis in pre-osteoclasts. In contrast, depletion of Musashi2 has no effects on cell cycle progression and p21WAF-1 protein expression in macrophages. Furthermore, depletion of Notch2 and its downstream target Hes1 in osteoclast precursors by shRNAs abrogates osteoclastogenesis by inhibiting NFATc1. Finally, absence of Musashi2 in osteoclast precursors promotes apoptosis and inhibits RANKL-induced nuclear factor-κB (NF-κB) activation, which is essential for osteoclast survival, Thus, Musashi2 is required for cell survival and optimal osteoclastogenesis by affecting Notch signaling and NF-κB activation.
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Affiliation(s)
- T Fujiwara
- Center for Osteoporosis and Metabolic Bone Diseases, Division of Endocrinology and Metabolism, Department of Internal Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - J Zhou
- Center for Osteoporosis and Metabolic Bone Diseases, Division of Endocrinology and Metabolism, Department of Internal Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - S Ye
- Center for Osteoporosis and Metabolic Bone Diseases, Division of Endocrinology and Metabolism, Department of Internal Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - H Zhao
- Center for Osteoporosis and Metabolic Bone Diseases, Division of Endocrinology and Metabolism, Department of Internal Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, USA
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25
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Abstract
PURPOSE OF REVIEW The Notch signaling pathway is known to play a pivotal role in T- and B-cell development and fate, presenting it as an attractive therapeutic target in alloimmunity. This review provides an overview of the mechanisms of Notch signaling, focusing on new insights into its diverse functions in T-cell activation, differentiation and memory subset formation, and the consequences thereof in transplantation. RECENT FINDINGS Recent evidence has shown that while not critical for early antigen-specific CD4 T-cell activation, Notch signaling regulates the survival of memory CD4 T cells via control of glycolytic metabolism; in contrast, Notch signaling is critical for the generation of short-lived CD8 effector T cells, but not memory CD8 cells. Transient, selective inhibition of various Notch receptors and ligands in models of solid organ transplantation has been shown to successfully modulate the alloimmune response, affecting the balance between effector and regulatory cells, with particular influence on the natural regulatory T-cell population. SUMMARY These studies reveal diverse roles for individual Notch receptors and ligands in peripheral immunity and indicate that selective targeting of the Notch pathway is a promising, novel approach for immune modulation in transplantation; the advent of therapeutic human antibodies to neutralize both the Notch ligands and the individual Notch receptors suggests that this approach could be efficiently developed.
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26
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Qian XQ, Chen LL, Cheng Q, Tian Y, Luo XF, Wan XY. Inhibition of Notch 1 receptor influenced the differentiation of Lin-CD45RA-dendritic cell precursors within ovarian carcinoma microenvironment. BMC Immunol 2016; 17:14. [PMID: 27259477 PMCID: PMC4893273 DOI: 10.1186/s12865-016-0150-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 05/08/2016] [Indexed: 02/02/2023] Open
Abstract
Background Previous evidence suggested that the differentiation of Lin-CD45RA-DC precursors were prior to plasmcytoid dendritic cells (pDCs) than myeloid dendritic cells (mDCs) within ovarian cancer microenvironment. However, the mechanism is still unclear. Therefore, we investigated the function of Notch 1 signal pathway in the differentiation of Lin-CD45RA-DC precursors. Methods The CD34+ hematopoietic stem cells were extracted from umbilical cord blood in term parturition, and Lin-CD45RA-DC precusors were separated and induced mature. Expression of Notch1 receptor and ligands in Lin-CD45RA-DC precusors was detected by Real-time PCR and was down-regulated by shRNA or γ-secretase inhibitor (GSI). Flow cytometry was used to analyze the subset of DCs with or without SKOV3 culture supernatants. IL-12 level was detected by ELISA. Results Expression of Notch1 receptors and ligands were detected in Lin-CD45RA-DC precursor cells. The Notch1 mRNA in Lin-CD45RA-DC precursors can be down-regulated by shRNA-Notch1 lentivirus transfection and GSI. ShRNA mediated Notch 1 knock-down significantly differentiated less plasmcytoid dendritic cells (pDCs), but generated more myeloid dendritic cells (mDCs), and this would not be influenced by the supernatant of the ovarian carcinoma cell line. GSI had the same effect in the differentiation of pDC. The secretion of IL-12 significantly increased after Notch1 knock-down with or without SKOV3 culture supernatants. Conclusions Notch1 is an important signaling pathway in the differentiation of Lin-CD45RA-DC precursor cells to plasmcytoid dendritic cells (pDCs). And this would not be affected by the supernatant of the ovarian carcinoma cell line.
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Affiliation(s)
- Xue-Qian Qian
- Women's Hospital, School of Medicine, Zhejiang University, Xueshi Road 1#, Hangzhou, China.,Department of Gynecologic Oncology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Li-Li Chen
- Women's Hospital, School of Medicine, Zhejiang University, Xueshi Road 1#, Hangzhou, China.,Department of Gynecologic Oncology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Qi Cheng
- Women's Hospital, School of Medicine, Zhejiang University, Xueshi Road 1#, Hangzhou, China.,Department of Gynecologic Oncology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yang Tian
- The First Affiliated Hospital, School of Medicine, Zhejiang University, Qingchun Road 79#, Hangzhou, China.,Key Laboratory of Combined Multi-organ Transplantation, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiao-Feng Luo
- Women's Hospital, School of Medicine, Zhejiang University, Xueshi Road 1#, Hangzhou, China.,Department of Gynecologic Oncology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiao-Yun Wan
- Women's Hospital, School of Medicine, Zhejiang University, Xueshi Road 1#, Hangzhou, China. .,Department of Gynecologic Oncology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, China.
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27
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Shang Y, Smith S, Hu X. Role of Notch signaling in regulating innate immunity and inflammation in health and disease. Protein Cell 2016; 7:159-74. [PMID: 26936847 PMCID: PMC4791423 DOI: 10.1007/s13238-016-0250-0] [Citation(s) in RCA: 166] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Accepted: 01/26/2016] [Indexed: 12/16/2022] Open
Abstract
The Notch signaling pathway is conserved from Drosophila to mammals and is critically involved in developmental processes. In the immune system, it has been established that Notch signaling regulates multiple steps of T and B cell development in both central and peripheral lymphoid organs. Relative to the well documented role of Notch signaling in lymphocyte development, less is known about its role in regulating myeloid lineage development and function, especially in the context of acute and chronic inflammation. In this review article, we will describe the evidence accumulated during the recent years to support a key regulatory role of the Notch pathway in innate immune and inflammatory responses and discuss the potential implications of such regulation for pathogenesis and therapy of inflammatory disorders.
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Affiliation(s)
- Yingli Shang
- School of Medicine and Institute for Immunology, Tsinghua University, Beijing, 100084, China
| | - Sinead Smith
- Department of Clinical Medicine, Trinity College Dublin, Dublin, 2, Ireland
| | - Xiaoyu Hu
- School of Medicine and Institute for Immunology, Tsinghua University, Beijing, 100084, China.
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28
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da Costa NMM, Fialho ADV, Proietti CC, da Silva Kataoka MS, Jaeger RG, de Alves-Júnior SM, de Jesus Viana Pinheiro J. Role of hypoxia-related proteins in invasion of ameloblastoma cells: crosstalk between NOTCH1, hypoxia-inducible factor 1α, a disintegrin and metalloproteinase 12, and heparin-binding epidermal growth factor. Histopathology 2016; 69:99-106. [PMID: 26707922 DOI: 10.1111/his.12922] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 12/20/2015] [Indexed: 12/17/2022]
Abstract
AIMS Ameloblastoma AME is a benign tumour characterized by local invasiveness, high recurrence rates, and diverse histological patterns. The oxygen concentration is reduced in specific areas of the tumour microenvironment, which leads to intratumoral hypoxia. Crosstalk between NOTCH1, a disintegrin and metalloproteinase 12 (ADAM-12), hypoxia-inducible factor 1α (HIF-1α) and heparin-binding epidermal growth factor (HB-EGF) under hypoxic conditions has been implicated in invadopodia formation, tumour invasiveness, and metastasis development. The aim of this study was to analyse the expression of these proteins, in order to further elucidate the mechanisms underlying AME invasiveness. METHODS AND RESULTS Twenty cases of AME, eight calcifying cystic odontogenic tumours CCOTs and 10 samples of dental follicle were used to investigate the expression of these proteins by immunohistochemistry with the primary antibodies anti-NOTCH1, anti-ADAM-12, anti-HIF-1α, and anti-HB-EGF. Immunostaining results were expressed as the percentage of stained area in images acquired in an AxioScope microscope equipped with an AxioCamHRc camera and a × 40 objective. The results showed that immunoexpression of all proteins was higher in the AME samples than in the CCOT and dental follicle samples (P < 0.05). CONCLUSIONS AME showed an increased presence of proteins associated with tumour invasiveness, which indicates a possible role of these proteins in the biological behaviour of this tumour.
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Affiliation(s)
| | | | | | | | - Ruy Gastaldoni Jaeger
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
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29
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The clerodane diterpene casearin J induces apoptosis of T-ALL cells through SERCA inhibition, oxidative stress, and interference with Notch1 signaling. Cell Death Dis 2016; 7:e2070. [PMID: 26821066 PMCID: PMC4816186 DOI: 10.1038/cddis.2015.413] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 12/17/2015] [Accepted: 12/18/2015] [Indexed: 11/17/2022]
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive hematologic malignancy that preferentially affects children and adolescents. Over 50% of human T-ALLs possess activating mutations of Notch1. The clerodane diterpene casearin J (CJ) is a natural product that inhibits the sarcoendoplasmatic reticulum calcium ATPase (SERCA) pump and induces cell death in leukemia cells, but the molecular mechanism of cytotoxicity remains poorly understood. Here we show that owing to SERCA pump inhibition, CJ induces depletion of the endoplasmic reticulum calcium pools, oxidative stress, and apoptosis via the intrinsic signaling pathway. Moreover, Notch1 signaling is reduced in T-ALL cells with auto-activating mutations in the HD-domain of Notch1, but not in cells that do not depend on Notch1 signaling. CJ also provoked a slight activation of NF-κB, and consistent with this notion a combined treatment of CJ and the NF-κB inhibitor parthenolide (Pt) led to a remarkable synergistic cell death in T-ALL cells. Altogether, our data support the concept that inhibition of the SERCA pump may be a novel strategy for the treatment of T-ALL with HD-domain-mutant Notch1 receptors and that additional treatment with the NF-κB inhibitor parthenolide may have further therapeutic benefits.
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30
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Notch1 deficiency decreases hepatic lipid accumulation by induction of fatty acid oxidation. Sci Rep 2016; 6:19377. [PMID: 26786165 PMCID: PMC4726366 DOI: 10.1038/srep19377] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 12/07/2015] [Indexed: 12/15/2022] Open
Abstract
Notch signaling pathways modulate various cellular processes, including cell proliferation, differentiation, adhesion, and communication. Recent studies have demonstrated that Notch1 signaling also regulates hepatic glucose production and lipid synthesis. However, the effect of Notch1 signaling on hepatic lipid oxidation has not yet been directly investigated. To define the function of Notch1 signaling in hepatic lipid metabolism, wild type mice and Notch1 deficient antisense transgenic (NAS) mice were fed a high-fat diet. High-fat diet -fed NAS mice exhibited a marked reduction in hepatic triacylglycerol accumulation compared with wild type obese mice. The improved fatty liver was associated with an increased expression of hepatic genes involved in fatty acid oxidation. However, lipogenic genes were not differentially expressed in the NAS liver, suggesting lipolytic-specific regulatory effects by Notch1 signaling. Expression of fatty acid oxidative genes and the rate of fatty acid oxidation were also increased by inhibition of Notch1 signaling in HepG2 cells. In addition, similar regulatory effects on lipid accumulation were observed in adipocytes. Taken together, these data show that inhibition of Notch1 signaling can regulate the expression of fatty acid oxidation genes and may provide therapeutic strategies in obesity-induced hepatic steatosis.
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31
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Singh BN, Singh HB, Singh A, Naqvi AH, Singh BR. Dietary phytochemicals alter epigenetic events and signaling pathways for inhibition of metastasis cascade: phytoblockers of metastasis cascade. Cancer Metastasis Rev 2015; 33:41-85. [PMID: 24390421 DOI: 10.1007/s10555-013-9457-1] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Cancer metastasis is a multistep process in which a cancer cell spreads from the site of the primary lesion, passes through the circulatory system, and establishes a secondary tumor at a new nonadjacent organ or part. Inhibition of cancer progression by dietary phytochemicals (DPs) offers significant promise for reducing the incidence and mortality of cancer. Consumption of DPs in the diet has been linked to a decrease in the rate of metastatic cancer in a number of preclinical animal models and human epidemiological studies. DPs have been reported to modulate the numerous biological events including epigenetic events (noncoding micro-RNAs, histone modification, and DNA methylation) and multiple signaling transduction pathways (Wnt/β-catenin, Notch, Sonic hedgehog, COX-2, EGFR, MAPK-ERK, JAK-STAT, Akt/PI3K/mTOR, NF-κB, AP-1, etc.), which can play a key role in regulation of metastasis cascade. Extensive studies have also been performed to determine the molecular mechanisms underlying antimetastatic activity of DPs, with results indicating that these DPs have significant inhibitory activity at nearly every step of the metastatic cascade. DPs have anticancer effects by inducing apoptosis and by inhibiting cell growth, migration, invasion, and angiogenesis. Growing evidence has also shown that these natural agents potentiate the efficacy of chemotherapy and radiotherapy through the regulation of multiple signaling pathways. In this review, we discuss the variety of molecular mechanisms by which DPs regulate metastatic cascade and highlight the potentials of these DPs as promising therapeutic inhibitors of cancer.
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Affiliation(s)
- B N Singh
- Research and Development Division, Sowbhagya Biotech Private Limited, Cherlapally, Hyderabad, 500051, Andhra Pradesh, India
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32
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Protein kinase D1 drives pancreatic acinar cell reprogramming and progression to intraepithelial neoplasia. Nat Commun 2015; 6:6200. [PMID: 25698580 PMCID: PMC4394184 DOI: 10.1038/ncomms7200] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 01/05/2015] [Indexed: 12/18/2022] Open
Abstract
The transdifferentiation of pancreatic acinar cells to a ductal phenotype (acinar-to-ductal metaplasia, ADM) occurs after injury or inflammation of the pancreas and is a reversible process. However, in the presence of activating Kras mutations or persistent epidermal growth factor receptor (EGF-R) signalling, cells that underwent ADM can progress to pancreatic intraepithelial neoplasia (PanIN) and eventually pancreatic cancer. In transgenic animal models, ADM and PanINs are initiated by high-affinity ligands for EGF-R or activating Kras mutations, but the underlying signalling mechanisms are not well understood. Here, using a conditional knockout approach, we show that protein kinase D1 (PKD1) is sufficient to drive the reprogramming process to a ductal phenotype and progression to PanINs. Moreover, using 3D explant culture of primary pancreatic acinar cells, we show that PKD1 acts downstream of TGFα and Kras, to mediate formation of ductal structures through activation of the Notch pathway.
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33
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Inflammatory signaling regulates hematopoietic stem and progenitor cell emergence in vertebrates. Blood 2015; 125:1098-106. [DOI: 10.1182/blood-2014-09-601542] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Key Points
TLR4–MyD88–NF-κB is required for HSPC emergence in zebrafish and mouse embryos. Notch functions downstream of inflammatory signaling to regulate HSPC emergence.
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Teodorczyk M, Schmidt MHH. Notching on Cancer's Door: Notch Signaling in Brain Tumors. Front Oncol 2015; 4:341. [PMID: 25601901 PMCID: PMC4283135 DOI: 10.3389/fonc.2014.00341] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 11/14/2014] [Indexed: 12/20/2022] Open
Abstract
Notch receptors play an essential role in the regulation of central cellular processes during embryonic and postnatal development. The mammalian genome encodes for four Notch paralogs (Notch 1–4), which are activated by three Delta-like (Dll1/3/4) and two Serrate-like (Jagged1/2) ligands. Further, non-canonical Notch ligands such as epidermal growth factor like protein 7 (EGFL7) have been identified and serve mostly as antagonists of Notch signaling. The Notch pathway prevents neuronal differentiation in the central nervous system by driving neural stem cell maintenance and commitment of neural progenitor cells into the glial lineage. Notch is therefore often implicated in the development of brain tumors, as tumor cells share various characteristics with neural stem and progenitor cells. Notch receptors are overexpressed in gliomas and their oncogenicity has been confirmed by gain- and loss-of-function studies in vitro and in vivo. To this end, special attention is paid to the impact of Notch signaling on stem-like brain tumor-propagating cells as these cells contribute to growth, survival, invasion, and recurrence of brain tumors. Based on the outcome of ongoing studies in vivo, Notch-directed therapies such as γ-secretase inhibitors and blocking antibodies have entered and completed various clinical trials. This review summarizes the current knowledge on Notch signaling in brain tumor formation and therapy.
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Affiliation(s)
- Marcin Teodorczyk
- Molecular Signal Transduction Laboratories, Institute for Microscopic Anatomy and Neurobiology, Focus Program Translational Neuroscience (FTN), Rhine Main Neuroscience Network (rmn2), Johannes Gutenberg University of Mainz School of Medicine , Mainz , Germany
| | - Mirko H H Schmidt
- Molecular Signal Transduction Laboratories, Institute for Microscopic Anatomy and Neurobiology, Focus Program Translational Neuroscience (FTN), Rhine Main Neuroscience Network (rmn2), Johannes Gutenberg University of Mainz School of Medicine , Mainz , Germany
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Increased Notch signalling inhibits anoikis and stimulates proliferation of prostate luminal epithelial cells. Nat Commun 2014; 5:4416. [PMID: 25048699 PMCID: PMC4167399 DOI: 10.1038/ncomms5416] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Accepted: 06/16/2014] [Indexed: 02/07/2023] Open
Abstract
The prostate epithelial lineage hierarchy remains inadequately defined. Recent lineage-tracing studies have implied the existence of prostate luminal epithelial progenitors with extensive regenerative capacity. However, this capacity has not been demonstrated in prostate stem cell activity assays, probably due to the strong susceptibility of luminal progenitors to anoikis. Here we show that constitutive expression of Notch1 intracellular domain impairs secretory function of mouse prostate luminal cells, suppresses anoikis of luminal epithelial cells by augmenting NF-κB activity independent of Hes-1, stimulates luminal cell proliferation by potentiating PI3K-AKT signaling, and rescues the capacities of the putative prostate luminal progenitors for unipotent differentiation in vivo and short-term self-renewal in vitro. Epithelial cell-autonomous AR signaling is dispensable for the Notch-mediated effects. As Notch activity is increased in prostate cancers and anoikis resistance is a hallmark for metastatic cancer cells, this study suggests a pro-metastatic function of Notch signaling during prostate cancer progression.
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Yu M, Liang W, Wen S, Zhao T, Zhu MX, Li HH, Long Q, Wang M, Cheng X, Liao YH, Yuan J. EphB2 contributes to human naive B-cell activation and is regulated by miR-185. FASEB J 2014; 28:3609-17. [PMID: 24803541 DOI: 10.1096/fj.13-247759] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
EphB2 is an important member of the receptor tyrosine kinases. Recently, EphB2 was shown to facilitate T-cell migration and monocyte activation. However, the effects of EphB2 on B cells remain unknown. In this study, the expression of EphB2 on B cells was tested by Western blot, and the roles of EphB2 in B-cell proliferation, cytokine secretion, and immunoglobulin (Ig) production were evaluated using EphB2 siRNA interference in human B cells from healthy volunteers. Our study revealed that EphB2 was distributed on naive B cells and was up-regulated on activated B cells. Moreover, B-cell proliferation (decreased by 22%, P<0.05), TNF-α secretion (decreased by 40%, P<0.01) and IgG production (decreased by 26%, P < 0.05) were depressed concordantly with the down-regulated EphB2 expression. Subsequently, we screened microRNAs that could regulate EphB2 expression in B cells, and discovered that miR-185 directly targeted to EphB2 mRNA and suppressed its expression. Furthermore, miR-185 overexpression inhibited B-cell activation, and the inhibitor of miR-185 enhanced B-cell activation. Moreover, abatement of EphB2 through miR-185 mimics or EphB2 siRNA attenuated the activation of Src-p65 and Notch1 signaling pathways in human B cells. Our study first suggested that EphB2 was involved in human naive B cell activation through Src-p65 and Notch1 signaling pathways and could be regulated by miR-185.
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Affiliation(s)
- Miao Yu
- Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Liang
- Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shuang Wen
- Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tong Zhao
- Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ming-Xin Zhu
- Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Huan-Huan Li
- Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qi Long
- Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Min Wang
- Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiang Cheng
- Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yu-Hua Liao
- Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Yuan
- Laboratory of Cardiovascular Immunology, Institute of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Diaz-Montero CM, Finke J, Montero AJ. Myeloid-derived suppressor cells in cancer: therapeutic, predictive, and prognostic implications. Semin Oncol 2014; 41:174-84. [PMID: 24787291 DOI: 10.1053/j.seminoncol.2014.02.003] [Citation(s) in RCA: 128] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Immune evasion is a hallmark of cancer. While there are multiple different mechanisms that cancer cells employ, myeloid-derived suppressor cells (MDSCs) are one of the key drivers of tumor-mediated immune evasion. MDSCs begin as myeloid cells recruited to the tumor microenvironment, where they are transformed into potent immunosuppressive cells. However, our understanding of the clinical relevance of MDSCs in cancer patients has significantly lagged behind the preclinical literature in part due to the absence of a cognate molecule present in mice, as well as to the considerable heterogeneity of MDSCs. However, if one evaluates the clinical literature through the filter of clinically robust endpoints, such as overall survival, three important phenotypes emerge: promyelocytic, monocytic, and granulocytic. Based on these studies, MDSCs have clear prognostic importance in multiple solid tumors, and emerging data support the utility of circulating MDSCs as a predictive marker for cancer immunotherapy, and even as an early leading marker for predicting clinical response to systemic chemotherapy in patients with advanced solid tumors. More recent preclinical data in immunosuppressed murine models suggest that MDSCs play an important role in tumor progression and the metastatic process that is independent of their immunosuppressive properties. Consequently, targeting MDSCs either in combination with cancer immunotherapy or independently as part of an approach to inhibit the metastatic process appears to be a very clinically promising strategy. We review different approaches to target MDSCs that could potentially be tested in future clinical trials in cancer patients.
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Affiliation(s)
- C Marcela Diaz-Montero
- Lerner Research Institute Department of Immunology; Cleveland Clinic Foundation, Cleveland, OH
| | - Jim Finke
- Lerner Research Institute Department of Immunology; Cleveland Clinic Foundation, Cleveland, OH
| | - Alberto J Montero
- Taussig Cancer Institute, Cleveland Clinic Foundation, Cleveland, OH.
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Park JS, Kim SH, Kim K, Jin CH, Choi KY, Jang J, Choi Y, Gwon AR, Baik SH, Yun UJ, Chae SY, Lee S, Kang YM, Lee KC, Arumugam TV, Mattson MP, Park JH, Jo DG. Inhibition of notch signalling ameliorates experimental inflammatory arthritis. Ann Rheum Dis 2013; 74:267-74. [PMID: 24255545 DOI: 10.1136/annrheumdis-2013-203467] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
OBJECTIVE To test the hypothesis that Notch signalling plays a role in the pathogenesis of rheumatoid arthritis (RA) and to determine whether pharmacological inhibition of Notch signalling with γ-secretase inhibitors can ameliorate the RA disease process in an animal model. METHODS Collagen-induced arthritis was induced in C57BL/6 or Notch antisense transgenic mice by immunisation with chicken type II collagen (CII). C57BL/6 mice were administered with different doses of inhibitors of γ-secretase, an enzyme required for Notch activation, at disease onset or after onset of symptoms. Severity of arthritis was monitored by clinical and histological scores, and in vivo non-invasive near-infrared fluorescence (NIRF) images. Micro-CT was used to confirm joint destruction. The levels of CII antibodies and cytokines in serum were determined by ELISA and bead-based cytokine assay. The expression levels of cytokines were studied by quantitative PCR in rheumatoid synovial fibroblasts. RESULTS The data show that Notch signalling stimulates synoviocytes and accelerates their production of proinflammatory cytokines and immune responses involving the upregulation of IgG1 and IgG2a. Pharmacological inhibition of γ-secretase and antisense-mediated knockdown of Notch attenuates the severity of inflammatory arthritis, including arthritis indices, paw thickness, tissue damage and neutrophil infiltration, and reduces the levels of active NF-κB, ICAM-1, proinflammatory cytokines and matrix metalloproteinase-3 activity in the mouse model of RA. CONCLUSIONS These results suggest that Notch is involved in the pathogenesis of RA and that inhibition of Notch signalling is a novel approach for treating RA.
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Affiliation(s)
- Jong-Sung Park
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea
| | - Seol-Hee Kim
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea Departments of Polymer Science and Chemical Engineering, Sungkyunkwan University, Suwon, Korea
| | - Kwangmeyung Kim
- Biomedical Research Center, Korea Institute of Science and Technology, Seoul, Korea
| | - Cheng-Hao Jin
- Department of Biochemistry and Molecular Biology, College of Life Science & Technology, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Ki Young Choi
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, USA
| | - Jiyeon Jang
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea
| | - Yuri Choi
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea
| | - A-Ryeong Gwon
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea
| | - Sang-Ha Baik
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea
| | - Ui Jeong Yun
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea
| | - Su Young Chae
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea
| | - Seulki Lee
- Russell H. Morgan Department of Radiology and Radiological Science, Center for Cancer Nanotechnology Excellence, Center for Nanomedicine at the Wilmer Eye Institute, Johns Hopkins University, Baltimore, Maryland, USA
| | - Young Mo Kang
- Department of Internal Medicine (Rheumatology), Kyungpook National University School of Medicine, Daegu, Korea
| | - Kang Choon Lee
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea
| | - Thiruma V Arumugam
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore, Singapore
| | - Mark P Mattson
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, Maryland, USA Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jae Hyung Park
- Departments of Polymer Science and Chemical Engineering, Sungkyunkwan University, Suwon, Korea
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea
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Cheng P, Kumar V, Liu H, Youn JI, Fishman M, Sherman S, Gabrilovich D. Effects of notch signaling on regulation of myeloid cell differentiation in cancer. Cancer Res 2013; 74:141-52. [PMID: 24220241 DOI: 10.1158/0008-5472.can-13-1686] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Functionally altered myeloid cells play an important role in immune suppression in cancer, in angiogenesis, and in tumor cells' invasion and metastases. Here, we report that inhibition of Notch signaling in hematopoietic progenitor cells (HPC), myeloid-derived suppressor cells (MDSC), and dendritic cells is directly involved in abnormal myeloid cell differentiation in cancer. Inhibition of Notch signaling was caused by the disruption of the interaction between Notch receptor and transcriptional repressor CSL, which is normally required for efficient transcription of target genes. This disruption was the result of serine phosphorylation of Notch. We demonstrated that increased activity of casein kinase 2 (CK2) observed in HPC and in MDSC could be responsible for the phosphorylation of Notch and downregulation of Notch signaling. Inhibition of CK2 by siRNA or by pharmacological inhibitor restored Notch signaling in myeloid cells and substantially improved their differentiation, both in vitro and in vivo. This study demonstrates a novel mechanism regulation of Notch signaling in cancer. This may suggest a new perspective for pharmacological regulation of differentiation of myeloid cells in cancer.
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Affiliation(s)
- Pingyan Cheng
- Authors' Affiliations: H. Lee Moffitt Cancer Center, Tampa, Florida; The Wistar Institute, Philadelphia, Pennsylvania; and University of Nebraska Medical Center, Omaha, Nebraska
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Wang C, Li X, Wang H, Xie Q, Xu Y. Notch1-Nuclear Factor κB Involves in Oxidative Stress-Induced Alcoholic Steatohepatitis. Alcohol Alcohol 2013; 49:10-6. [DOI: 10.1093/alcalc/agt167] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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41
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Zhou W, Wang G, Guo S. Regulation of angiogenesis via Notch signaling in breast cancer and cancer stem cells. Biochim Biophys Acta Rev Cancer 2013; 1836:304-20. [PMID: 24183943 DOI: 10.1016/j.bbcan.2013.10.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 10/14/2013] [Accepted: 10/18/2013] [Indexed: 02/07/2023]
Abstract
Breast cancer angiogenesis is elicited and regulated by a number of factors including the Notch signaling. Notch receptors and ligands are expressed in breast cancer cells as well as in the stromal compartment and have been implicated in carcinogenesis. Signals exchanged between neighboring cells through the Notch pathway can amplify and consolidate molecular differences, which eventually dictate cell fates. Notch signaling and its crosstalk with many signaling pathways play an important role in breast cancer cell growth, migration, invasion, metastasis and angiogenesis, as well as cancer stem cell (CSC) self-renewal. Therefore, significant attention has been paid in recent years toward the development of clinically useful antagonists of Notch signaling. Better understanding of the structure, function and regulation of Notch intracellular signaling pathways, as well as its complex crosstalk with other oncogenic signals in breast cancer cells will be essential to ensure rational design and application of new combinatory therapeutic strategies. Novel opportunities have emerged from the discovery of Notch crosstalk with inflammatory and angiogenic cytokines and their links to CSCs. Combinatory treatments with drugs designed to prevent Notch oncogenic signal crosstalk may be advantageous over λ secretase inhibitors (GSIs) alone. In this review, we focus on the more recent advancements in our knowledge of aberrant Notch signaling contributing to breast cancer angiogenesis, as well as its crosstalk with other factors contributing to angiogenesis and CSCs.
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Affiliation(s)
- Weiqiang Zhou
- Key Laboratory of Environmental Pollution and Microecology of Liaoning Province, Shenyang Medical College, No. 146 North Huanghe St, Huanggu Dis, Shenyang City, Liaoning Pro 110034, PR China.
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Takebe N, Nguyen D, Yang SX. Targeting notch signaling pathway in cancer: clinical development advances and challenges. Pharmacol Ther 2013; 141:140-9. [PMID: 24076266 DOI: 10.1016/j.pharmthera.2013.09.005] [Citation(s) in RCA: 301] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Accepted: 09/05/2013] [Indexed: 12/15/2022]
Abstract
Notch signaling plays an important role in development and cell fate determination, and it is deregulated in human hematologic malignancies and solid tumors. This review includes a brief introduction of the relevant pathophysiology of Notch signaling pathway and primarily focuses on the clinical development of promising agents that either obstruct Notch receptor cleavages such as γ-secretase inhibitors (GSIs) or interfere with the Notch ligand-receptor interaction by monoclonal antibodies (mAbs). Antitumor activity by GSIs and mAbs administered as single agent in early phases of clinical trials has been observed in advanced or metastatic thyroid cancer, non-small cell lung cancer, intracranial tumors, sarcoma or desmoid tumors, colorectal cancer with neuroendocrine features, melanoma and ovarian cancer. A number of mechanism-based adverse events particularly gastrointestinal toxicities emerged and mitigation strategies are developed after testing multiple GSIs and Notch targeting mAbs. We also discuss pharmacodynamic biomarkers in conjunction with methods of assessment of the molecular target inhibition validation. Biomarkers of efficacy or benefit may be of importance for a successful development of this class of drugs.
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Affiliation(s)
- Naoko Takebe
- Cancer Therapy Evaluation Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Bethesda, United States.
| | - Dat Nguyen
- National Clinical Target Validation Laboratory, Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Bethesda, United States
| | - Sherry X Yang
- National Clinical Target Validation Laboratory, Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Bethesda, United States.
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AZIZ MONOWAR, ISHIHARA SHUNJI, ANSARY MESBAHUDDIN, SONOYAMA HIROKI, TADA YASUMASA, OKA AKIHIKO, KUSUNOKI RYUSAKU, TAMAGAWA YUJI, FUKUBA NOBUHIKO, MISHIMA YOSHIYUKI, MISHIRO TSUYOSHI, OSHIMA NAOKI, MORIYAMA ICHIRO, ISHIMURA NORIHISA, SATO SHUICHI, YUKI TAKAFUMI, KAWASHIMA KOUSAKU, KINOSHITA YOSHIKAZU. Crosstalk between TLR5 and Notch1 signaling in epithelial cells during intestinal inflammation. Int J Mol Med 2013; 32:1051-62. [PMID: 24048326 DOI: 10.3892/ijmm.2013.1501] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Accepted: 08/27/2013] [Indexed: 11/06/2022] Open
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Norcantharidin, derivative of cantharidin, for cancer stem cells. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:838651. [PMID: 24073010 PMCID: PMC3773992 DOI: 10.1155/2013/838651] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2013] [Revised: 07/28/2013] [Accepted: 07/29/2013] [Indexed: 01/15/2023]
Abstract
Cancer stem cells (CSCs) existing in human cancers have been demonstrated to be a major cause of cancer treatment resistance, invasion, metastasis, and relapse. Self-renewal pathways, Wnt/β-catenin, Sonic hedgehog (Shh), and the Notch signaling pathway play critical roles in developing CSCs and lead to angiogenesis, migration, invasion, and metastasis. Multidrug resistance (MDR) is an unfavorable factor causing the failure of treatments against cancer cells. The most important and thoroughly studied mechanism involved in MDR is the active efflux of chemotherapeutic agents through membrane drug transporters. There is growing evidence that Norcantharidin (NCTD), a water-soluble synthetic small molecule derivative of naturally occurring cantharidin from the medicinal insect blister beetle (Mylabris phalerata Pallas), is capable of chemoprevention and tumor inhibition. We summarize investigations into the modulation of self-renewal pathways and MDR in CSCs by NCTD. This review may aid in further investigation of using NCTD to develop more effective strategies for cancer treatment to reduce resistance and recurrence.
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Du W, Amarachintha S, Sipple J, Schick J, Steinbrecher K, Pang Q. Inflammation-mediated notch signaling skews fanconi anemia hematopoietic stem cell differentiation. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2013; 191:2806-17. [PMID: 23926327 PMCID: PMC3773980 DOI: 10.4049/jimmunol.1203474] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Hematopoietic stem cells (HSCs) can either self-renew or differentiate into various types of cells of the blood lineage. Signaling pathways that regulate this choice of self-renewal versus differentiation are currently under extensive investigation. In this study, we report that deregulation of Notch signaling skews HSC differentiation in mouse models of Fanconi anemia (FA), a genetic disorder associated with bone marrow failure and progression to leukemia and other cancers. In mice expressing a transgenic Notch reporter, deletion of the Fanca or Fancc gene enhances Notch signaling in multipotential progenitors (MPPs), which is correlated with decreased phenotypic long-term HSCs and increased formation of MPP1 progenitors. Furthermore, we found an inverse correlation between Notch signaling and self-renewal capacity in FA hematopoietic stem and progenitor cells. Significantly, FA deficiency in MPPs deregulates a complex network of genes in the Notch and canonical NF-κB pathways. Genetic ablation or pharmacologic inhibition of NF-κB reduces Notch signaling in FA MPPs to near wild type level, and blocking either NF-κB or Notch signaling partially restores FA HSC quiescence and self-renewal capacity. These results suggest a functional crosstalk between Notch signaling and NF-κB pathway in regulation of HSC differentiation.
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Affiliation(s)
- Wei Du
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio 45229
| | - Surya Amarachintha
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio 45229
| | - Jared Sipple
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio 45229
| | - Jonathan Schick
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio 45229
| | - Kris Steinbrecher
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio 45229
| | - Qishen Pang
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio 45229
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio 45229
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Abstract
Notch signaling is an evolutionarily conserved cell signaling pathway involved in cell fate during development, stem cell renewal and differentiation in postnatal tissues. Roles for Notch in carcinogenesis, in the biology of cancer stem cells and tumor angiogenesis have been reported. These features identify Notch as a potential therapeutic target in oncology. Based on the molecular structure of Notch receptor, Notch ligands and Notch activators, a set of Notch pathway inhibitors have been developed. Most of these inhibitors had shown anti-tumor effects in preclinical studies. At the same time, the combinatorial effect of these inhibitors with current chemotherapeutical drugs is still under study in different clinical trials. In this review, we describe the basics of Notch signaling and the role of Notch in normal and cancer stem cells as a logic way to develop different Notch inhibitors and their current stage of progress for cancer patient's treatment.
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Affiliation(s)
- Ingrid Espinoza
- University of Mississippi, Cancer Institute, Jackson, Mississippi
| | - Lucio Miele
- University of Mississippi, Cancer Institute, Jackson, Mississippi
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47
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Transcriptional profiling of HMGB1-induced myocardial repair identifies a key role for Notch signaling. Mol Ther 2013; 21:1841-51. [PMID: 23760446 DOI: 10.1038/mt.2013.137] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Accepted: 05/22/2013] [Indexed: 12/16/2022] Open
Abstract
Exogenous high-mobility group box 1 protein (HMGB1) administration to the mouse heart, during acute myocardial infarction (MI), results in cardiac regeneration via resident c-kit(+) cell (CPC) activation. Aim of the present study was to identify the molecular pathways involved in HMGB1-induced heart repair. Gene expression profiling was performed to identify differentially expressed genes in the infarcted and bordering regions of untreated and HMGB1-treated mouse hearts, 3 days after MI. Functional categorization of the transcripts, accomplished using Ingenuity Pathway Analysis software (IPA), revealed that genes involved in tissue regeneration, that is, cardiogenesis, vasculogenesis and angiogenesis, were present both in the infarcted area and in the peri-infarct zone; HMGB1 treatment further increased the expression of these genes. IPA revealed the involvement of Notch signaling pathways in HMGB1-treated hearts. Importantly, HMGB1 determined a 35 and 58% increase in cardiomyocytes and CPCs expressing Notch intracellular cytoplasmic domain, respectively. Further, Notch inhibition by systemic treatment with the γ-secretase inhibitor DAPT, which blocked the proteolytic activation of Notch receptors, reduced the number of CPCs, their proliferative fraction, and cardiomyogenic differentiation in HMGB1-treated infarcted hearts. The present study gives insight into the molecular processes involved in HMGB1-mediated cardiac regeneration and indicates Notch signaling as a key player.
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Alberi L, Hoey SE, Brai E, Scotti AL, Marathe S. Notch signaling in the brain: in good and bad times. Ageing Res Rev 2013; 12:801-14. [PMID: 23570941 DOI: 10.1016/j.arr.2013.03.004] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 03/16/2013] [Accepted: 03/22/2013] [Indexed: 01/13/2023]
Abstract
Notch signaling is an evolutionarily conserved pathway, which is fundamental for neuronal development and specification. In the last decade, increasing evidence has pointed out an important role of this pathway beyond embryonic development, indicating that Notch also displays a critical function in the mature brain of vertebrates and invertebrates. This pathway appears to be involved in neural progenitor regulation, neuronal connectivity, synaptic plasticity and learning/memory. In addition, Notch appears to be aberrantly regulated in neurodegenerative diseases, including Alzheimer's disease and ischemic injury. The molecular mechanisms by which Notch displays these functions in the mature brain are not fully understood, but are currently the subject of intense research. In this review, we will discuss old and novel Notch targets and molecular mediators that contribute to Notch function in the mature brain and will summarize recent findings that explore the two facets of Notch signaling in brain physiology and pathology.
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Affiliation(s)
- Lavinia Alberi
- Unit of Anatomy, Department of Medicine, University of Fribourg, Switzerland.
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Beijer MR, Molenaar R, Goverse G, Mebius RE, Kraal G, den Haan JMM. A crucial role for retinoic acid in the development of Notch-dependent murine splenic CD8- CD4- and CD4+ dendritic cells. Eur J Immunol 2013; 43:1608-16. [PMID: 23519987 DOI: 10.1002/eji.201343325] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 02/11/2013] [Accepted: 03/13/2013] [Indexed: 02/06/2023]
Abstract
The vitamin A metabolite retinoic acid is important for the function of the adaptive immune system, but the mechanism is not completely understood. Here we show that vitamin A is essential for the generation of Notch-dependent CD8(-) dendritic cells (DCs) in the spleen. We observed that CD8(-) CD4(-) (double negative (DN)) and CD4(+) DCs, but not CD8(+) DCs, express vitamin A regulated genes. To determine whether vitamin A levels influence splenic DC development, we generated mice that were fed a vitamin A-deficient diet. We detected a specific reduction of CD4(+) and DN DCs in the spleens of mice fed a vitamin A-deficient diet, while pre-DC numbers in both spleen and bone marrow were not affected. Vitamin A was specifically necessary for the development of RelB(high) , Notch-dependent CD4(+) , and DN DCs. In addition, DN DCs showed reduced proliferation during vitamin A deficiency. In contrast, mice that had received a diet with increased amounts of retinoic acid showed a significant expansion of Notch-dependent DN DCs. These data demonstrate that vitamin A stimulates the development of Notch-dependent splenic DCs and indicate that inefficient generation of DCs may contribute to the immune deficits observed during vitamin A deficiency.
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Affiliation(s)
- Marieke R Beijer
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, the Netherlands
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Impact of notch signaling on inflammatory responses in cardiovascular disorders. Int J Mol Sci 2013; 14:6863-88. [PMID: 23531541 PMCID: PMC3645668 DOI: 10.3390/ijms14046863] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2013] [Revised: 03/01/2013] [Accepted: 03/15/2013] [Indexed: 01/22/2023] Open
Abstract
Notch signaling is a major pathway in cell fate decisions. Since the first reports showing the major role of Notch in embryonic development, a considerable and still growing literature further highlights its key contributions in various pathological processes during adult life. In particular, Notch is now considered as a major player in vascular homeostasis through the control of key cellular functions. In parallel, confounding evidence emerged that inflammatory responses regulate Notch signaling in vitro in endothelial cells, smooth muscle cells or vascular infiltrating cells and in vivo in vascular and inflammatory disorders and in cardiovascular diseases. This review presents how inflammation influences Notch in vascular cells and, reciprocally, emphasizes the functional role of Notch on inflammatory processes, notably by regulating key cell functions (differentiation, proliferation, apoptosis/survival, activation). Understanding how the disparity of Notch receptors and ligands impacts on vasculature biology remains critical for the design of relevant and adequate therapeutic strategies targeting Notch in this major pathological context.
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