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Farooqi AA, Butt G, El-Zahaby SA, Attar R, Sabitaliyevich UY, Jovic JJ, Tang KF, Naureen H, Xu B. Luteolin mediated targeting of protein network and microRNAs in different cancers: Focus on JAK-STAT, NOTCH, mTOR and TRAIL-mediated signaling pathways. Pharmacol Res 2020; 160:105188. [PMID: 32919041 DOI: 10.1016/j.phrs.2020.105188] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/21/2020] [Accepted: 08/28/2020] [Indexed: 02/07/2023]
Abstract
There has always been a keen interest of basic and clinical researchers to search for cancer therapeutics having minimum off-target effects and maximum anticancer activities. In accordance with this approach, there has been an explosion in the field of natural products research in the past few decades because of extra-ordinary list of natural extracts and their biologically and pharmacologically active constituents having significant medicinal properties. Apparently, luteolin-mediated anticancer effects have been investigated in different cancers but there is superfluousness of superficial data. Generalized scientific evidence encompassing apoptosis, DNA damage and anti-inflammatory effects has been reported extensively. However, how luteolin modulates deregulated oncogenic pathways in different cancers has not been comprehensively uncovered. In this review we have attempted to focus on cutting-edge research which has unveiled remarkable abilities of luteolin to modulate deregulated oncogenic pathways in different cancers. We have partitioned the review into various sections to separately discuss advancements in therapeutic targeting of oncogenic protein networks. We have provided detailed mechanistic insights related to JAK-STAT signaling and summarized how luteolin inhibited STAT proteins to inhibit STAT-driven gene network. We have also individually analyzed Wnt/β-catenin and NOTCH pathway and how luteolin effectively targeted these pathways. Mapping of the signaling landscape has revealed that NOTCH pathway can be targeted therapeutically. NOTCH pathway was noted to be targeted by luteolin. We have also conceptually analyzed how luteolin restored TRAIL-induced apoptosis in resistant cancers. Luteolin induced an increase in pro-apoptotic proteins and efficiently inhibited anti-apoptotic proteins to induce apoptosis. Luteolin mediated regulation of non-coding RNAs is an exciting and emerging facet. Excitingly, there is sequential and systematic accumulation of clues which have started to shed light on intricate regulation of microRNAs by luteolin in different cancers. Collectively, sophisticated information will enable us to develop a refined understanding of the multi-layered regulation of signaling pathways and non-coding RNAs by luteolin in different cancers.
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Affiliation(s)
- Ammad Ahmad Farooqi
- Institute of Biomedical and Genetic Engineering (IBGE), Islamabad, 44000, Pakistan.
| | | | - Sally A El-Zahaby
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy and Drug Manufacturing, Pharos University in Alexandria, Alexandria, Egypt
| | - Rukset Attar
- Department of Obstetrics and Gynecology, Yeditepe University, Turkey
| | - Uteuliyev Yerzhan Sabitaliyevich
- Department of Health Policy and Health Care Development, Kazakh Medical University of Continuing Education, Almaty, 050004, Kazakhstan
| | - Jovana Joksimovic Jovic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, SvetozaraMarkovića 69, 34000, Kragujevac, Serbia
| | - Kai-Fu Tang
- Digestive Cancer Center, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325015, Zhejiang, China
| | - Humaira Naureen
- Faculty of Pharmaceutical Sciences, Riphah International University, Islamabad, Pakistan
| | - Baojun Xu
- Food Science and Technology Program, BNU-HKBU United International College, Zhuhai, 519087, Guangdong, China.
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Guo R, Chen F, Shi Z. Suppression of Notch Signaling Stimulates Progesterone Synthesis by Enhancing the Expression of NR5A2 and NR2F2 in Porcine Granulosa Cells. Genes (Basel) 2020; 11:genes11020120. [PMID: 31978970 PMCID: PMC7073743 DOI: 10.3390/genes11020120] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 01/18/2020] [Indexed: 02/07/2023] Open
Abstract
The conserved Notch pathway is reported to be involved in progesterone synthesis and secretion; however, the exact effects remain controversial. To determine the role and potential mechanisms of the Notch signaling pathway in progesterone biosynthesis in porcine granulosa cells (pGCs), we first used a pharmacological γ-secretase inhibitor, N-(N-(3,5-difluorophenacetyl-l-alanyl))-S-phenylglycine t-butyl ester (DAPT), to block the Notch pathway in cultured pGCs and then evaluated the expression of genes in the progesterone biosynthesis pathway and key transcription factors (TFs) regulating steroidogenesis. We found that DAPT dose- and time-dependently increased progesterone secretion. The expression of steroidogenic proteins NPC1 and StAR and two TFs, NR5A2 and NR2F2, was significantly upregulated, while the expression of HSD3B was significantly downregulated. Furthermore, knockdown of both NR5A2 and NR2F2 with specific siRNAs blocked the upregulatory effects of DAPT on progesterone secretion and reversed the effects of DAPT on the expression of NPC1, StAR, and HSD3B. Moreover, knockdown of NR5A2 and NR2F2 stimulated the expression of Notch3. In conclusion, the inhibition of Notch signaling stimulated progesterone secretion by enhancing the expression of NPC1 and StAR, and the two TFs NR5A2 and NR2F2 acted as downstream TFs of Notch signaling in regulating progesterone synthesis.
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Affiliation(s)
- Rihong Guo
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China;
- Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China;
| | - Fang Chen
- Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China;
| | - Zhendan Shi
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China;
- Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China;
- Correspondence:
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Morte B, Gil-Ibáñez P, Bernal J. Regulation of Gene Expression by Thyroid Hormone in Primary Astrocytes: Factors Influencing the Genomic Response. Endocrinology 2018; 159:2083-2092. [PMID: 29617759 DOI: 10.1210/en.2017-03084] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 03/28/2018] [Indexed: 11/19/2022]
Abstract
Astrocytes mediate the action of thyroid hormone in the brain on other neural cells through the production of the active hormone triiodothyronine (T3) from its precursor thyroxine. T3 has also many effects on the astrocytes in vivo and in culture, but whether these actions are directly mediated by transcriptional regulation is not clear. In this work, we have analyzed the genomic response to T3 of cultured astrocytes isolated from the postnatal mouse cerebral cortex using RNA sequencing. Cultured astrocytes express relevant genes of thyroid hormone metabolism and action encoding type 2 deiodinase (Dio2), Mct8 transporter (Slc16a2), T3 receptors (Thra1 and Thrb), and nuclear corepressor (Ncor1) and coactivator (Ncoa1). T3 changed the expression of 668 genes (4.5% of expressed genes), of which 117 were responsive to T3 in the presence of cycloheximide. The Wnt and Notch pathways were downregulated at the posttranscriptional level. Comparison with the effect of T3 on astrocyte-enriched genes in mixed cerebrocortical cultures isolated from fetal cortex revealed that the response to T3 is influenced by the degree of astrocyte maturation and that, in agreement with its physiological effects, T3 promotes the transition between the fetal and adult patterns of gene expression.
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Affiliation(s)
- Beatriz Morte
- Centro de Investigación Biomédica en Red de Enfermedades Raras, Instituto de Salud Carlos III, Madrid, Spain
| | - Pilar Gil-Ibáñez
- Centro de Investigación Biomédica en Red de Enfermedades Raras, Instituto de Salud Carlos III, Madrid, Spain
- Instituto de Investigaciones Biomédicas, Consejo Superior de Investigaciones Científicas and Universidad Autónoma de Madrid, Madrid, Spain
| | - Juan Bernal
- Centro de Investigación Biomédica en Red de Enfermedades Raras, Instituto de Salud Carlos III, Madrid, Spain
- Instituto de Investigaciones Biomédicas, Consejo Superior de Investigaciones Científicas and Universidad Autónoma de Madrid, Madrid, Spain
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Eberl M, Mangelberger D, Swanson JB, Verhaegen ME, Harms PW, Frohm ML, Dlugosz AA, Wong SY. Tumor Architecture and Notch Signaling Modulate Drug Response in Basal Cell Carcinoma. Cancer Cell 2018; 33:229-243.e4. [PMID: 29395868 PMCID: PMC5811398 DOI: 10.1016/j.ccell.2017.12.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 09/03/2017] [Accepted: 12/20/2017] [Indexed: 12/18/2022]
Abstract
Hedgehog (Hh) pathway inhibitors such as vismodegib are highly effective for treating basal cell carcinoma (BCC); however, residual tumor cells frequently persist and regenerate the primary tumor upon drug discontinuation. Here, we show that BCCs are organized into two molecularly and functionally distinct compartments. Whereas interior Hh+/Notch+ suprabasal cells undergo apoptosis in response to vismodegib, peripheral Hh+++/Notch- basal cells survive throughout treatment. Inhibiting Notch specifically promotes tumor persistence without causing drug resistance, while activating Notch is sufficient to regress already established lesions. Altogether, these findings suggest that the three-dimensional architecture of BCCs establishes a natural hierarchy of drug response in the tumor and that this hierarchy can be overcome, for better or worse, by modulating Notch.
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Affiliation(s)
- Markus Eberl
- Departments of Dermatology, and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Doris Mangelberger
- Departments of Dermatology, and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jacob B Swanson
- Departments of Dermatology, and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Monique E Verhaegen
- Departments of Dermatology, and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Paul W Harms
- Departments of Pathology and Dermatology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Marcus L Frohm
- Departments of Dermatology, and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Andrzej A Dlugosz
- Departments of Dermatology, and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Sunny Y Wong
- Departments of Dermatology, and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA.
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Abstract
Parathyroid hormone (PTH) and Notch receptors regulate bone formation by governing the function of osteoblastic cells. To determine whether PTH interacts with Notch signaling as a way to control osteoblast function, we tested the effects of PTH on Notch activity in osteoblast- and osteocyte-enriched cultures. Notch signaling was activated in osteoblast-enriched cells from wild-type C57BL/6J mice following exposure to the Notch ligand Delta-like (Dll)1 or by the transient transfection of the Notch intracellular domain (NICD), the transcriptionally active fragment of Notch1. To induce Notch signaling in osteocyte-enriched cultures, a murine model of Notch2 gain-of-function was used. PTH opposed the stimulatory effects of Dll1 on Hey1, Hey2 and HeyL mRNA levels in osteoblast-enriched cells and suppressed the expression of selected Notch target genes in osteocyte-enriched cultures, either under basal conditions or in the context of Notch2 gain-of-function. Induction of Notch signaling in osteocytes did not alter the inhibitory effect of PTH on Sost expression, but reduced the stimulation of Tnfsf11 mRNA levels by PTH. In agreement with these in vitro observations, male mice administered with PTH displayed suppressed Hey1 and HeyL expression in parietal bones. Transactivation experiments with a Notch reporter construct and electrophoretic mobility shift assays in osteoblast-enriched cells suggest that PTH acts by decreasing the capacity of Rbpjκ to bind to DNA. In conclusion, downregulation of Notch in osteoblasts and osteocytes may represent a mechanism contributing to the anabolic effects of PTH in bone.
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Affiliation(s)
- Stefano Zanotti
- Departments of Orthopaedic Surgery and Medicine, UConn Musculoskeletal Institute, UConn Health, Farmington, CT 06030-5456, USA.
| | - Ernesto Canalis
- Departments of Orthopaedic Surgery and Medicine, UConn Musculoskeletal Institute, UConn Health, Farmington, CT 06030-5456, USA
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Braune EB, Lendahl U. Notch -- a goldilocks signaling pathway in disease and cancer therapy. Discov Med 2016; 21:189-196. [PMID: 27115169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The Notch signaling pathway is a fundamental signaling mechanism operating in most, if not all, multicellular organisms and in most cell types in the body. Like other "ivy league" pathways such as Wnt, PI3K, Sonic Hedgehog, Receptor Tyrosine Kinases (RTKs), and JAK/STAT signaling, the Notch pathway is a linear signaling mechanism, i.e., an extracellular ligand activates a receptor, which ultimately leads to transcriptional alterations in the cell nucleus, but Notch signaling is a strict cell-cell communication mechanism and lacks built-in amplification steps in the signaling pathway. Dysregulated Notch signaling, either by direct mutations in the pathway or by altered signaling output, is increasingly linked to disease, and Notch can act as an oncogene or tumor suppressor depending on the cellular context. This underscores that appropriate level of Notch signaling is important for differentiation and tissue homeostasis, a notion supported also by genetic data indicating that Notch signaling is very gene dosage-sensitive. Thus, too much or too little signaling can lead to disease and Notch can therefore be considered a Goldilocks signaling pathway. Given the emerging role of dysregulated Notch signaling in disease, there is increasing interest in developing therapeutic approaches to modulate Notch signaling. In this review we discuss recent findings on how signal transduction is tuned in the Notch pathway and how Notch signaling is dysregulated in disease. We also discuss different strategies to modulate Notch signaling for clinical use, for example by novel antibody-based tools and by taking advantage of the cross-talk between Notch and other signaling mechanisms.
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Affiliation(s)
- Eike-Benjamin Braune
- Department of Cell and Molecular Biology, Karolinska Institute, SE-171 77 Stockholm, Sweden
| | - Urban Lendahl
- Department of Cell and Molecular Biology, Karolinska Institute, SE-171 77 Stockholm, Sweden
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Li S, Hu X, Wang Z, Wu M, Zhang J. Different profiles of notch signaling in cigarette smoke-induced pulmonary emphysema and bleomycin-induced pulmonary fibrosis. Inflamm Res 2015; 64:363-71. [PMID: 25813392 DOI: 10.1007/s00011-015-0816-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 02/09/2015] [Accepted: 03/22/2015] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVE Different profiles of Notch signaling mediate naive T cell differentiation which might be involved in pulmonary emphysema and fibrosis. METHODS C57BL/6 mice were randomized into cigarette smoke (CS) exposure, bleomycin (BLM) exposure, and two separate groups of control for sham exposure to CS or BLM. The paratracheal lymph nodes of the animals were analyzed by real-time PCR and immunohistochemistry. Morphometry of the lung parenchyma, measurement of the cytokines, and cytometry of the bronchoalveolar lavage fluid (BALF) were also done accordingly. RESULTS In comparison with controls, all Notch receptors and ligands were upregulated by chronic CS exposure, especially Notch3 and DLL1 (P < 0.01), and this was in line with emphysema-like morphology and Th1-biased inflammation. While Notch3 and DLL1 were downregulated by BLM exposure (P < 0.01), those was in line with fibrotic lung remodeling and Th2 polarization. CONCLUSIONS This founding implies that the CS exposure but not the BLM exposure is capable of initiating Notch signaling in lymphoid tissue of the lung, which is likely relevant to the pathogenesis of pulmonary emphysema. Unable to initiate the Th1 response or inhibit it may lead to Th2 polarization and aberrant repair.
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Affiliation(s)
- Shi Li
- Department of Respiratory Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, 430022, China
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Ahmed I, Roy B, Chandrakesan P, Venugopal A, Xia L, Jensen R, Anant S, Umar S. Evidence of functional cross talk between the Notch and NF-κB pathways in nonneoplastic hyperproliferating colonic epithelium. Am J Physiol Gastrointest Liver Physiol 2013; 304:G356-70. [PMID: 23203159 PMCID: PMC3566617 DOI: 10.1152/ajpgi.00372.2012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Accepted: 11/28/2012] [Indexed: 01/31/2023]
Abstract
The Notch and NF-κB signaling pathways regulate stem cell function and inflammation in the gut, respectively. We investigate whether a functional cross talk exists between the two pathways during transmissible murine colonic hyperplasia (TMCH) caused by Citrobacter rodentium (CR). During TMCH, NF-κB activity and subunit phosphorylation in colonic crypts of NIH Swiss mice at days 6 and 12 were associated with increases in downstream target CXC chemokine ligand (CXCL)-1/keratinocyte-derived chemokine (KC) expression. Blocking Notch signaling acutely for 5 days with the Notch blocker dibenzazepine (DBZ) failed to inhibit crypt NF-κB activity or CXCL-1/KC expression. Chronic DBZ administration for 10 days, however, blocked Notch and NF-κB signaling in the crypts and abrogated hyperplasia. Intriguingly, chronic Notch inhibition was associated with significant increases in IL-1α, granulocyte colony-stimulating factor, monocyte chemoattractant protein 1, macrophage inflammatory protein 2, and KC in the crypt-denuded lamina propria or whole distal colon, with concomitant increases in myeloperoxidase activity. In core-3(-/-) mice, which are defective in intestinal mucin, DBZ administration replicated the results of NIH Swiss mice; in Apc(Min/+) mice, which are associated with CR-induced elevation of NF-κB-p65(276) expression, DBZ reversed the increase in NF-κB-p65(276), which may have blocked rapid proliferation of the mutated crypts. DBZ further blocked reporter activities involving the NF-κB-luciferase reporter plasmid or the Toll-like receptor 4/NF-κB/SEAPorter HEK-293 reporter cell line, while ectopic expression of Notch-N(ICD) reversed the inhibitory effect. Dietary bael (Aegle marmelos) extract (4%) and curcumin (4%) restored Notch and NF-κB cross talk in NIH Swiss mice, inhibited CR/DBZ-induced apoptosis in the crypts, and promoted crypt regeneration. Thus functional cross talk between the Notch and NF-κB pathways during TMCH regulates hyperplasia and/or inflammation in response to CR infection.
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Affiliation(s)
- Ishfaq Ahmed
- Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, KS 66160, USA
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Liu YP, Yang CJ, Huang MS, Yeh CT, Wu ATH, Lee YC, Lai TC, Lee CH, Hsiao YW, Lu J, Shen CN, Lu PJ, Hsiao M. Cisplatin selects for multidrug-resistant CD133+ cells in lung adenocarcinoma by activating Notch signaling. Cancer Res 2012; 73:406-16. [PMID: 23135908 DOI: 10.1158/0008-5472.can-12-1733] [Citation(s) in RCA: 163] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Platinum-based chemotherapy is the first-line treatment for non-small cell lung cancer, but recurrence occurs in most patients. Recent evidence suggests that CD133(+) cells are the cause of drug resistance and tumor recurrence. However, the correlation between chemotherapy and regulation of CD133(+) cells has not been investigated methodically. In this study, we revealed that CD133(+) lung cancer cells labeled by a human CD133 promoter-driven GFP reporter exhibited drug resistance and stem cell characteristics. Treatment of H460 and H661 cell lines with low-dose cisplatin (IC(20)) was sufficient to enrich CD133(+) cells, to induce DNA damage responses, and to upregulate ABCG2 and ABCB1 expression, which therefore increased the cross-resistance to doxorubicin and paclitaxel. This cisplatin-induced enrichment of CD133(+) cells was mediated through Notch signaling as judged by increased levels of cleaved Notch1 (NICD1). Pretreatment with the γ-secretase inhibitor, N-[N-(3,5-difluorophenacetyl)-1-alanyl]-S-phenylglycine t-butyl ester (DAPT), or Notch1 short hairpin RNAs (shRNA) remarkably reduced the cisplatin-induced enrichment of CD133(+) cells and increased the sensitivity to doxorubicin and paclitaxel. Ectopic expression of NICD1 reversed the action of DAPT on drug sensitivity. Immunohistochemistry showed that CD133(+) cells were significantly increased in the relapsed tumors in three of six patients with lung cancer who have received cisplatin treatment. A similar effect was observed in animal experiments as cisplatin treatment increased Notch1 cleavage and the ratio of CD133(+) cells in engrafted tumors. Intratumoral injection of DAPT with cisplatin treatment significantly reduced CD133(+) cell number. Together, our results showed that cisplatin induces the enrichment of CD133(+) cells, leading to multidrug resistance by the activation of Notch signaling.
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Affiliation(s)
- Yu-Peng Liu
- Institute of Clinical Medicine, National Cheng Kung University, Medical College, Tainan, Taiwan
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Fakorede A. EORTC-NCI-AACR--20th symposium molecular targets and cancer therapeutics: mechanisms of targeting for cancer treatment. IDrugs 2008; 11:857-8. [PMID: 19051142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
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11
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Fernandez L, Rodriguez S, Huang H, Chora A, Fernandes J, Mumaw C, Cruz E, Pollok K, Cristina F, Price JE, Ferkowicz MJ, Scadden DT, Clauss M, Cardoso AA, Carlesso N. Tumor necrosis factor-alpha and endothelial cells modulate Notch signaling in the bone marrow microenvironment during inflammation. Exp Hematol 2008; 36:545-558. [PMID: 18439488 DOI: 10.1016/j.exphem.2007.12.012] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2007] [Revised: 11/28/2007] [Accepted: 12/24/2007] [Indexed: 01/22/2023]
Abstract
OBJECTIVE Homeostasis of the hematopoietic compartment is challenged and maintained during conditions of stress by mechanisms that are poorly defined. To understand how the bone marrow (BM) microenvironment influences hematopoiesis, we explored the role of Notch signaling and BM endothelial cells in providing microenvironmental cues to hematopoietic cells in the presence of inflammatory stimuli. MATERIALS AND METHODS The human BM endothelial cell line (BMEC) and primary human BM endothelial cells were analyzed for expression of Notch ligands and the ability to expand hematopoietic progenitors in an in vitro coculture system. In vivo experiments were carried out to identify modulation of Notch signaling in BM endothelial and hematopoietic cells in mice challenged with tumor necrosis factor-alpha (TNF-alpha) or lipopolysaccharide (LPS), or in Tie2-tmTNF-alpha transgenic mice characterized by constitutive TNF-alpha activation. RESULTS BM endothelial cells were found to express Jagged ligands and to greatly support progenitor's colony-forming ability. This effect was markedly decreased by Notch antagonists and augmented by increasing levels of Jagged2. Physiologic upregulation of Jagged2 expression on BMEC was observed upon TNF-alpha activation. Injection of TNF-alpha or LPS upregulated three- to fourfold Jagged2 expression on murine BM endothelial cells in vivo and resulted in increased Notch activation on murine hematopoietic stem/progenitor cells. Similarly, constitutive activation of endothelial cells in Tie2-tmTNF-alpha mice was characterized by increased expression of Jagged2 and by augmented Notch activation on hematopoietic stem/progenitor cells. CONCLUSIONS Our results provide the first evidence that BM endothelial cells promote expansion of hematopoietic progenitor cells by a Notch-dependent mechanism and that TNF-alpha and LPS can modulate the levels of Notch ligand expression and Notch activation in the BM microenvironment in vivo.
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Affiliation(s)
- Luis Fernandez
- Center of Regenerative Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Mass., USA
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Calaf GM, Roy D. Cell adhesion proteins altered by 17beta estradiol and parathion in breast epithelial cells. Oncol Rep 2008; 19:165-169. [PMID: 18097591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023] Open
Abstract
The association between breast cancer initiation and prolonged exposure to estrogen suggests that this hormone may also have an etiologic role in such a process. On the other hand, many studies have found an association between human cancer and exposure to agricultural pesticides such as parathion, an organophosphorous pesticide used in agriculture to control mosquito plagues. However, the key factors behind the initiation of breast cancer remain to be elucidated. The aim of this study was to determine the effect of 17beta estradiol (estrogen) and parathion on protein expression in cell transformation of human breast epithelial cells in vitro. Estrogen and parathion alone and in combination induced malignant transformation of an immortalized human breast epithelial cell line, MCF-I0F, as indicated by anchorage independency and invasive capabilities. The results indicate that a combination of estrogen and parathion increased the expression of related cell adhesion proteins such as Dvl, Notch, CD146 and beta catenin. In conclusion, it can be suggested that pesticides affect human breast cell adhesion changes indicative of transformation.
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Affiliation(s)
- G M Calaf
- Instituto de Alta Investigación, Universidad de Tarapaca, Arica, Chile.
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Abstract
Cells from Ewing sarcoma exhibit cellular features and express markers, suggesting that the tumor is of neuroectodermal origin. Because Notch signaling regulates the differentiation of neuroectodermal cells during development, we examined the role of Notch signaling in Ewing sarcomas. We found that Ewing sarcomas express Notch receptors, ligands, and the Notch target gene HES1. To determine the functional implications of Notch signaling, we expressed tetracycline-regulated constitutively active, dominant-negative (DN), or wild-type Notch-1 receptors in two Ewing sarcoma cell lines, or we treated the cell lines with a gamma-secretase inhibitor. Expression of the constitutively active Notch-1 reduced proliferation and expression of the DN Notch-1 reduced apoptosis in vitro. However, there was only a small difference in the volume of tumors that formed when the cell lines expressing these constructs were implanted in nude mice. Xenograft tumors derived from the cell lines expressing DN Notch-1 exhibited a neural phenotype. Treatment with a gamma-secretase inhibitor caused similar changes as expression of the DN construct. Notch signaling plays a role in cell differentiation, proliferation, and apoptosis in Ewing sarcoma, but its inhibition is only associated with a small change in tumor growth potential.
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Affiliation(s)
- Frank Baliko
- Program in Developmental and Stem Cell Biology, University of Toronto, Toronto, Canada
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Scorey N, Fraser SP, Patel P, Pridgeon C, Dallman MJ, Djamgoz MBA. Notch signalling and voltage-gated Na+ channel activity in human prostate cancer cells: independent modulation of in vitro motility. Prostate Cancer Prostatic Dis 2006; 9:399-406. [PMID: 16832382 DOI: 10.1038/sj.pcan.4500894] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This study tested the possible functional relationship of two signalling mechanisms shown previously to be involved in human prostate cancer (PCa), Notch and voltage-gated sodium channel. Notch1 and Notch2 were differentially expressed in PCa cell lines of varying metastatic potential (LNCaP, PC-3, PC-3M) in comparison to a normal prostate cell line (PNT2), whereas Notch3 and Notch4 were not expressed. The Notch ligand Jagged1, but not Jagged2, was increased in all cell lines, whereas the Notch downstream target Deltex was not expressed. In comparison to the LNCaP cell line, Hes1, another downstream target, showed elevated expression in the metastatic PC-3 and PC-3M cells and promoted lateral motility. In contrast, the Notch ligand Delta-like1 (Dll1) levels were higher in LNCaP compared with PC-3 and PC-3M cells. Importantly, decreasing Dll1 expression increased the lateral motility of PC-3 cells, whereas blocking voltage-gated Na(+) channel activity with tetrodotoxin decreased motility. However, the effect of Dll1 was independent of Notch signalling through Hes1 and voltage-gated Na(+) channel expression/activity.
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MESH Headings
- Amyloid Precursor Protein Secretases/antagonists & inhibitors
- Basic Helix-Loop-Helix Transcription Factors/metabolism
- Calcium-Binding Proteins/metabolism
- Cell Line, Tumor
- Cell Movement/drug effects
- Cell Proliferation/drug effects
- Dimethyl Sulfoxide/pharmacology
- Enzyme Inhibitors/pharmacology
- Epithelial Cells/drug effects
- Epithelial Cells/metabolism
- Homeodomain Proteins/metabolism
- Humans
- Intercellular Signaling Peptides and Proteins/metabolism
- Ion Channel Gating/drug effects
- Jagged-1 Protein
- Male
- Membrane Proteins/metabolism
- Poisons/pharmacology
- Prostatic Neoplasms/metabolism
- Prostatic Neoplasms/pathology
- Proto-Oncogene Proteins/metabolism
- RNA, Messenger/drug effects
- RNA, Messenger/metabolism
- Receptor, Notch1/metabolism
- Receptor, Notch2/metabolism
- Receptor, Notch3
- Receptor, Notch4
- Receptors, Notch/drug effects
- Receptors, Notch/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Serrate-Jagged Proteins
- Signal Transduction/drug effects
- Sodium Channels/drug effects
- Sodium Channels/metabolism
- Solvents/pharmacology
- Tetrodotoxin/pharmacology
- Transcription Factor HES-1
- Tumor Cells, Cultured
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Affiliation(s)
- N Scorey
- Neuroscience Solutions to Cancer Research Group, Division of Cell and Molecular Biology, Imperial College London, South Kensington Campus, London, UK
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15
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Abstract
In the current issue of Developmental Cell, work by Gustafsson and coworkers demonstrates that hypoxia synergizes with Notch to inhibit differentiation of myogenic and neural precursor cells. This effect requires a newly described interaction between the transcriptionally active form of HIF-1alpha and the intracellular domain of Notch.
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Affiliation(s)
- Pilar Cejudo-Martin
- Molecular Biology Section, Division of Biological Sciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA
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16
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Gustafsson MV, Zheng X, Pereira T, Gradin K, Jin S, Lundkvist J, Ruas JL, Poellinger L, Lendahl U, Bondesson M. Hypoxia requires notch signaling to maintain the undifferentiated cell state. Dev Cell 2006; 9:617-28. [PMID: 16256737 DOI: 10.1016/j.devcel.2005.09.010] [Citation(s) in RCA: 793] [Impact Index Per Article: 44.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2005] [Revised: 07/08/2005] [Accepted: 09/12/2005] [Indexed: 02/06/2023]
Abstract
In addition to controlling a switch to glycolytic metabolism and induction of erythropoiesis and angiogenesis, hypoxia promotes the undifferentiated cell state in various stem and precursor cell populations. Here, we show that the latter process requires Notch signaling. Hypoxia blocks neuronal and myogenic differentiation in a Notch-dependent manner. Hypoxia activates Notch-responsive promoters and increases expression of Notch direct downstream genes. The Notch intracellular domain interacts with HIF-1alpha, a global regulator of oxygen homeostasis, and HIF-1alpha is recruited to Notch-responsive promoters upon Notch activation under hypoxic conditions. Taken together, these data provide molecular insights into how reduced oxygen levels control the cellular differentiation status and demonstrate a role for Notch in this process.
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Affiliation(s)
- Maria V Gustafsson
- Department of Cell and Molecular Biology, Medical Nobel Institute, Karolinska Institutet, SE-171 77 Stockholm, Sweden
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17
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Abstract
Notch signaling regulates cell fate determination and many developmental processes. Here we report that lateral inhibition, a major mechanism for Notch activity, is modulated by Hairy, a bHLH-WRPW protein. In Xenopus, Notch can have from inhibitory, permissive to enhancing roles in muscle or neural differentiation. These cell context-dependent effects correlate with Hairy expression levels from high to low, respectively, in the cells. Moreover, Notch effects can be altered upon manipulation of Hairy expression. We propose that Hairy provides a cell context in which a cell can interpret Notch and other extrinsic signals by controlling responsiveness of its target genes; this mode of Hairy-Notch interaction may apply in other systems.
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Affiliation(s)
- Yanzhen Cui
- Department of Environmental and Biomolecular Systems, Oregon Graduate Institute School of Science and Engineering, Oregon Health and Science University, 20000 NW Walker Road, Beaverton, OR 97006, USA.
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