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Vitale G, Dicitore A, Barrea L, Sbardella E, Razzore P, Campione S, Faggiano A, Colao A, Albertelli M, Altieri B, Bottiglieri F, De Cicco F, Di Molfetta S, Fanciulli G, Feola T, Ferone D, Ferraù F, Gallo M, Giannetta E, Grillo F, Grossrubatscher E, Guadagno E, Guarnotta V, Isidori AM, Lania A, Lenzi A, Calzo FL, Malandrino P, Messina E, Modica R, Muscogiuri G, Pes L, Pizza G, Pofi R, Puliani G, Rainone C, Rizza L, Rubino M, Ruggieri RM, Sesti F, Venneri MA, Zatelli MC. From microbiota toward gastro-enteropancreatic neuroendocrine neoplasms: Are we on the highway to hell? Rev Endocr Metab Disord 2021; 22:511-525. [PMID: 32935263 PMCID: PMC8346435 DOI: 10.1007/s11154-020-09589-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/04/2020] [Indexed: 02/06/2023]
Abstract
Gut microbiota is represented by different microorganisms that colonize the intestinal tract, mostly the large intestine, such as bacteria, fungi, archaea and viruses. The gut microbial balance has a key role in several functions. It modulates the host's metabolism, maintains the gut barrier integrity, participates in the xenobiotics and drug metabolism, and acts as protection against gastro-intestinal pathogens through the host's immune system modulation. The impaired gut microbiota, called dysbiosis, may be the result of an imbalance in this equilibrium and is linked with different diseases, including cancer. While most of the studies have focused on the association between microbiota and gastrointestinal adenocarcinomas, very little is known about gastroenteropancreatic (GEP) neuroendocrine neoplasms (NENs). In this review, we provide an overview concerning the complex interplay between gut microbiota and GEP NENs, focusing on the potential role in tumorigenesis and progression in these tumors.
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Affiliation(s)
- Giovanni Vitale
- Istituto Auxologico Italiano IRCCS, Laboratory of Geriatric and Oncologic Neuroendocrinology Research, Cusano Milanino, MI, Italy.
- Department of Clinical Sciences and Community Health (DISCCO), University of Milan, Milan, Italy.
| | - Alessandra Dicitore
- Department of Clinical Sciences and Community Health (DISCCO), University of Milan, Milan, Italy
| | - Luigi Barrea
- Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy
| | - Emilia Sbardella
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Paola Razzore
- Endocrinology Unit, A.O. Ordine Mauriziano, Turin, Italy
| | | | | | - Annamaria Colao
- Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy
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Motylewska E, Braun M, Kazimierczuk Z, Ławnicka H, Stępień H. IGF1R and MAPK15 Emerge as Potential Targets of Pentabromobenzylisothioureas in Lung Neuroendocrine Neoplasms. Pharmaceuticals (Basel) 2020; 13:ph13110354. [PMID: 33138224 PMCID: PMC7692632 DOI: 10.3390/ph13110354] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 10/19/2020] [Accepted: 10/26/2020] [Indexed: 11/30/2022] Open
Abstract
Pentabromobenzylisothioureas are antitumor agents with diverse properties, including the inhibition of MAPK15, IGF1R and PKD1 kinases. Their dysregulation has been implicated in the pathogenesis of several cancers, including bronchopulmonary neuroendocrine neoplasms (BP-NEN). The present study assesses the antitumor potential of ZKKs, a series of pentabromobenzylisothioureas, on the growth of the lung carcinoid H727 cell line. It also evaluates the expression of MAPK15, IGF1R and PKD1 kinases in different BP-NENs. The viability of the H727 cell line was assessed by colorimetric MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide) and its proliferation by BrdU (5-bromo-2′-deoxyuridine) assay. Tissue kinase expression was measured using TaqMan-based RT-PCR and immunohistochemistry. ZKKs (10−4 to 10−5 M) strongly inhibited H727 cell viability and proliferation and their antineoplastic effects correlated with their concentrations (p < 0.001). IGF1R and MAPK15 were expressed at high levels in all subtypes of BP-NENs. In addition, the SCLC (small cell lung carcinoma) patients demonstrated higher mRNA levels of IGF1R (p = 0.010) and MAPK15 (p = 0.040) than the other BP-NEN groups. BP-NENs were characterized by low PKD1 expression, and lung neuroendocrine cancers demonstrated lower PKD1 mRNA levels than carcinoids (p = 0.003). ZKKs may suppress BP-NEN growth by inhibiting protein kinase activity. Our results suggest also a possible link between high IGF1R and MAPK15 expression and the aggressive phenotype of BP-NEN tumors.
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Affiliation(s)
- Ewelina Motylewska
- Department of Immunoendocrinology, Chair of Endocrinology, Medical University of Lodz, Pomorska 251, 92-213 Lodz, Poland; (E.M.); (H.Ł.)
| | - Marcin Braun
- Department of Pathology, Chair of Oncology, Medical University of Lodz, Pomorska 251, 92-213 Lodz, Poland;
| | - Zygmunt Kazimierczuk
- Department of Chemistry, Warsaw University of Life Sciences, Nowoursynowska 159C, 02-787 Warsaw, Poland;
| | - Hanna Ławnicka
- Department of Immunoendocrinology, Chair of Endocrinology, Medical University of Lodz, Pomorska 251, 92-213 Lodz, Poland; (E.M.); (H.Ł.)
| | - Henryk Stępień
- Department of Immunoendocrinology, Chair of Endocrinology, Medical University of Lodz, Pomorska 251, 92-213 Lodz, Poland; (E.M.); (H.Ł.)
- Correspondence: ; Tel.: +48-42-201-4412
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Bösch F, Altendorf-Hofmann A, Jacob S, Auernhammer CJ, Spitzweg C, Boeck S, Schubert-Fritschle G, Werner J, Kirchner T, Angele MK, Knösel T. Distinct Expression Patterns of VEGFR 1-3 in Gastroenteropancreatic Neuroendocrine Neoplasms: Supporting Clinical Relevance, but not a Prognostic Factor. J Clin Med 2020; 9:jcm9103368. [PMID: 33096620 PMCID: PMC7589439 DOI: 10.3390/jcm9103368] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 10/11/2020] [Accepted: 10/14/2020] [Indexed: 12/14/2022] Open
Abstract
INTRODUCTION Gastroenteropancreatic neuroendocrine neoplasms (GEP-NENs) are an increasing tumor entity. Since many patients are diagnosed at an advanced stage, treatment is still challenging and dependent on many tumor and patient specific factors. Therefore, the aim of the present study was to elucidate the expression rates and the prognostic value of vascular endothelial growth factor receptor (VEGFR) 1-3 in GEP-NENs. A potential association to immune checkpoint markers was further investigated. MATERIAL AND METHODS The expression levels of VEGFR 1-3 were analyzed by immunohistochemistry and correlated with the expression of the checkpoint markers PD-1 and PD-L1. Furthermore, the tumor samples of 249 GEP-NEN patients were studied and correlated with overall survival rates and clinicopathological features. Kaplan-Meier analyses and the log rank test were used for survival analyses. Categorical variables were compared by the χ2 test. RESULTS The most common primary tumor site was the small intestine (50.6%), followed by the pancreas (25.7%). VEGFR 1 was highly expressed in 59%, VEGFR 2 in 6.4%, and VEGFR 3 in 61.8% of the analyzed samples. The expression of VEGFR 1-3 was not significantly associated with survival rates. Pancreatic NENs had the highest expression of VEGFR 1 and 3 in 80% of the cases. VEGFR 1-3 positivity correlated with the expression levels of immune checkpoint markers. DISCUSSION VEGFR 1-3 show a distinct expression pattern in different subgroups of neuroendocrine neoplasias indicating a conceivable target. Moreover, there was a substantial association between VEGFRs and immune checkpoint markers. Taken together, anti-VEGFR therapy represents a promising therapeutic approach in GEP-NEN patients and should be addressed in future studies.
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Affiliation(s)
- Florian Bösch
- Department of General, Visceral, and Transplant Surgery, Ludwig-Maximilians-University Munich, 81377 Munich, Germany; (F.B.); (S.J.); (J.W.); (M.K.A.)
- Interdisciplinary Center of Neuroendocrine Tumors of the GastroEnteroPancreatic System, Ludwig-Maximilians-University of Munich, 81377 Munich, Germany; (C.J.A.); (C.S.); (S.B.); (G.S.-F.); (T.K.)
| | - Annelore Altendorf-Hofmann
- Department of General, Visceral und Vascular Surgery, Friedrich-Schiller University, 07743 Jena, Germany;
| | - Sven Jacob
- Department of General, Visceral, and Transplant Surgery, Ludwig-Maximilians-University Munich, 81377 Munich, Germany; (F.B.); (S.J.); (J.W.); (M.K.A.)
- Interdisciplinary Center of Neuroendocrine Tumors of the GastroEnteroPancreatic System, Ludwig-Maximilians-University of Munich, 81377 Munich, Germany; (C.J.A.); (C.S.); (S.B.); (G.S.-F.); (T.K.)
| | - Christoph J. Auernhammer
- Interdisciplinary Center of Neuroendocrine Tumors of the GastroEnteroPancreatic System, Ludwig-Maximilians-University of Munich, 81377 Munich, Germany; (C.J.A.); (C.S.); (S.B.); (G.S.-F.); (T.K.)
- Department of Internal Medicine 4, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Christine Spitzweg
- Interdisciplinary Center of Neuroendocrine Tumors of the GastroEnteroPancreatic System, Ludwig-Maximilians-University of Munich, 81377 Munich, Germany; (C.J.A.); (C.S.); (S.B.); (G.S.-F.); (T.K.)
- Department of Internal Medicine 4, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Stefan Boeck
- Interdisciplinary Center of Neuroendocrine Tumors of the GastroEnteroPancreatic System, Ludwig-Maximilians-University of Munich, 81377 Munich, Germany; (C.J.A.); (C.S.); (S.B.); (G.S.-F.); (T.K.)
- Department of Medicine 3 and Comprehensive Cancer Center, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Gabriele Schubert-Fritschle
- Interdisciplinary Center of Neuroendocrine Tumors of the GastroEnteroPancreatic System, Ludwig-Maximilians-University of Munich, 81377 Munich, Germany; (C.J.A.); (C.S.); (S.B.); (G.S.-F.); (T.K.)
- Munich Cancer Registry (MCR) of the Munich Tumour Centre (TZM), Institute for Medical Information Processing, Biometry, and Epidemiology (IBE), Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Jens Werner
- Department of General, Visceral, and Transplant Surgery, Ludwig-Maximilians-University Munich, 81377 Munich, Germany; (F.B.); (S.J.); (J.W.); (M.K.A.)
- Interdisciplinary Center of Neuroendocrine Tumors of the GastroEnteroPancreatic System, Ludwig-Maximilians-University of Munich, 81377 Munich, Germany; (C.J.A.); (C.S.); (S.B.); (G.S.-F.); (T.K.)
| | - Thomas Kirchner
- Interdisciplinary Center of Neuroendocrine Tumors of the GastroEnteroPancreatic System, Ludwig-Maximilians-University of Munich, 81377 Munich, Germany; (C.J.A.); (C.S.); (S.B.); (G.S.-F.); (T.K.)
- Institute of Pathology, Ludwig-Maximilians-University, 81337 Munich, Germany
| | - Martin K. Angele
- Department of General, Visceral, and Transplant Surgery, Ludwig-Maximilians-University Munich, 81377 Munich, Germany; (F.B.); (S.J.); (J.W.); (M.K.A.)
- Interdisciplinary Center of Neuroendocrine Tumors of the GastroEnteroPancreatic System, Ludwig-Maximilians-University of Munich, 81377 Munich, Germany; (C.J.A.); (C.S.); (S.B.); (G.S.-F.); (T.K.)
| | - Thomas Knösel
- Interdisciplinary Center of Neuroendocrine Tumors of the GastroEnteroPancreatic System, Ludwig-Maximilians-University of Munich, 81377 Munich, Germany; (C.J.A.); (C.S.); (S.B.); (G.S.-F.); (T.K.)
- Institute of Pathology, Ludwig-Maximilians-University, 81337 Munich, Germany
- Correspondence: ; Tel.: +49-89-218076602
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Targeted Therapies in the Management of Well-Differentiated Digestive and Lung Neuroendocrine Neoplasms. Curr Treat Options Oncol 2020; 21:96. [PMID: 33029680 DOI: 10.1007/s11864-020-00794-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/25/2020] [Indexed: 01/05/2023]
Abstract
OPINION STATEMENT Ongoing advances in our understanding of neuroendocrine tumor (NET) biology, genetics, and immunology, will continue to expand the availability of targeted therapies, thus improving the outcomes of patients. Well-differentiated neuroendocrine tumors (NETs) are grouped into pancreatic and non-pancreatic NETs (includes GI and thoracic NETs) for treatment considerations (Fig. 1). For panNETs, initial therapy is driven by the need of radiographic response, and targeted agents are typically reserved for second and third line based on the toxicity profile. Treatment options for non-pancreatic NETs are also expanding and while SSAs are the typical first-line option, everolimus and PRRT both remain approved therapies for future lines, and VEGF TKIs are showing promising results in research settings. Sequencing these agents and best time to incorporate peptide receptor radio therapy into the management algorithm remains an unmet need.
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Can insulin-like growth factor 1 (IGF-1), IGF-1 receptor connective tissue growth factor and Ki-67 labelling index have a prognostic role in pulmonary carcinoids? Oncotarget 2018; 9:22653-22664. [PMID: 29854305 PMCID: PMC5978255 DOI: 10.18632/oncotarget.25203] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 02/21/2018] [Indexed: 12/11/2022] Open
Abstract
Introduction Altered expression of Insulin-like Growth Factor-1 (IGF-1), its receptor (IGF-1R), Connective Tissue Growth Factor (CTGF) and Hypoxia Inducible Factor-1 (HIF-1), has been implicated in tumorigenesis. So far, these factors have not been studied systematically in Pulmonary Carcinoids (PCs). Aims To examine IGF-1, IGF-1R, CTGF and HIF-1 expression in PCs, and assess their prognostic value over established factors. Materials & Methods Retrospective study of 121 PCs (104 Typical and 17 Atypical). The expression of growth factors was studied immunohistochemically and tumors were considered positive if immunoreactivity appeared in >50% of cells. Results All studied parameters were expressed in the majority of tumors (IGF-1, IGF-1R, CTGF and HIF-1, in 78.5%, 67%, 72% and 78%, respectively). Their expression tended to be more frequent in TCs and in tumors with Ki-67≤2% (significant only for HIF-1; 82 vs. 53%; p=0.023 and 83 vs. 63%; p=0.025 respectively). CTGF was the only factor correlated with more extensive disease (larger size; presence of lymph node and distant metastases). According to logistic regression analysis, only advanced age, Ki-67≥3.4% and lymph node involvement could predict the development of distant metastases. Conclusions IGF-1, IGF-1R, CTGF and HIF-1 are avidly expressed in PCs; however, their presence did not appear to be of statistically significant value over established prognostic factors.
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Abstract
Gastroenteropancreatic neuroendocrine neoplasms (GEP-NENs) constitute a heterogeneous group of tumours associated with variable clinical presentations, growth rates, and prognoses. To improve the management of GEP-NENs, the WHO developed a classification system that enables tumours to be graded based on markers of cell proliferation in biopsy specimens. Indeed, histopathology has been a mainstay in the diagnosis of GEP-NENs, and the WHO grading system facilitates therapeutic decision-making; however, considerable intratumoural heterogeneity, predominantly comprising regional variations in proliferation rates, complicates the evaluation of tumour biology. The use of molecular imaging modalities to delineate the most-aggressive cell populations is becoming more widespread. In addition, molecular profiling is increasingly undertaken in the clinical setting, and genomic studies have revealed a number of chromosomal alterations in GEP-NENs, although the 'drivers' of neoplastic development have not been identified. Thus, our molecular understanding of GEP-NENs remains insufficient to inform on patient prognosis or selection for treatments, and the WHO classification continues to form the basis for management of this disease. Nevertheless, our increasing understanding of the molecular genetics and biology of GEP-NENs has begun to expose flaws in the WHO classification. We describe the current understanding of the molecular characteristics of GEP-NENs, and discuss how advances in molecular profiling measurements, including assays of circulating mRNAs, are likely to influence the management of these tumours.
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Abstract
When diagnosed at an early stage, resection of pancreatic neuroendocrine tumors (NETs) is often curative. Unfortunately, curative surgery is rarely an option for patients with metastatic disease. Multiple options are available for the management of patients with advanced pancreatic NETs, including surgery, liver-directed therapy, and systemic therapies. Because of the heterogeneity of disease biology and presentation, a multidisciplinary approach to management is critical. Treatment with somatostatin analogs, sunitinib, everolimus, and alkylating agents provide effective systemic therapeutic options for patients. Future studies to evaluate the optimal timing, sequence, and combination of therapies, as well as to identify predictors of response, are warranted.
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Abstract
OPINION STATEMENT Neuroendocrine tumors (NETs) are a heterogeneous group of malignancies characterized by variable but most often indolent biologic behavior. Well-differentiated NETs can be broadly classified as either carcinoid or pancreatic NET. Although they have similar characteristics on routine histologic evaluation, the 2 tumor subtypes have different biology and respond differently to treatment, with most therapeutic agents demonstrating higher response rates in pancreatic NETs compared with carcinoid. Until recently, systemic treatment options for patients with advanced NETs were limited. However, improvements in our understanding of signaling pathways involved in the pathogenesis, growth, and spread of NETs have translated into an expansion of treatment options. Aberrant signaling through the mechanistic pathway of rapamycin (mTOR) pathway has been implicated in neuroendocrine tumorigenesis. Additionally, altered expression of mTOR pathway components has been observed in NETs and has been associated with clinical outcomes. Targeting the mTOR pathway has emerged as an effective treatment strategy in the management of advanced NETs. In a randomized, placebo-controlled study of patients with advanced pancreatic NET, treatment with the mTOR inhibitor everolimus was associated with improved progression-free survival (PFS). Largely based upon these data, everolimus has been approved in the United States and Europe for the treatment of patients with advanced pancreatic NET. The activity of everolimus remains under investigation in patients with carcinoid tumors. In a randomized study of patients with advanced carcinoid tumors associated with carcinoid syndrome, the addition of everolimus to octreotide was associated with improved PFS compared with octreotide. However, the results did not meet the prespecified level of statistical significance based on central review of radiographic imaging. Results from a randomized study examining the efficacy of everolimus in patients with nonfunctional gastrointestinal and lung NETs are awaited. In addition, further investigation is needed to determine whether primary tumor site or other clinical and molecular factors can impact response to mTOR inhibition. Although everolimus can slow tumor progression, significant tumor reduction is rarely obtained. Targeting multiple signaling pathways is a treatment strategy that may provide better tumor control and overcome resistance mechanisms involved with targeting a single pathway. Results of ongoing and future studies will provide important information regarding the added benefit of combining mTOR inhibitors with other targeted agents, such as VEGF pathway inhibitors, and cytotoxic chemotherapy in the treatment of advanced NETs.
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Affiliation(s)
- Jennifer Chan
- Department of Medical Oncology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215 USA
| | - Matthew Kulke
- Department of Medical Oncology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215 USA
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Cheung R. Racial and Socioeconomic Disparities in Malignant Carcinoid Cancer Cause Specific Survival: Analysis of the Surveillance, Epidemiology and End Results National Cancer Registry. Asian Pac J Cancer Prev 2013; 14:7117-20. [DOI: 10.7314/apjcp.2013.14.12.7117] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kim JT, Li J, Jang ER, Gulhati P, Rychahou PG, Napier DL, Wang C, Weiss HL, Lee EY, Anthony L, Townsend CM, Liu C, Evers B. Deregulation of Wnt/β-catenin signaling through genetic or epigenetic alterations in human neuroendocrine tumors. Carcinogenesis 2013; 34:953-61. [PMID: 23354304 PMCID: PMC3643417 DOI: 10.1093/carcin/bgt018] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 12/19/2012] [Accepted: 01/12/2013] [Indexed: 12/18/2022] Open
Abstract
Carcinoid tumors are rare neuroendocrine tumors (NETs) that are increasing in incidence. Mutation and altered expression of Wnt/β-catenin signaling components have been described in many tumors but have not been well-studied in NETs. Here, we observed accumulation of β-catenin in the cytoplasm and/or nucleus in 25% of clinical NET tissues. By mutational analysis, the mutations of β-catenin (I35S) and APC (E1317Q, T1493T) were identified in NET cells and the tissues. Expression of representative Wnt inhibitors was absent or markedly decreased in BON, a human pancreatic carcinoid cell line; treatment with 5-aza-2'-deoxycytidine (5-aza-CdR) increased expression levels of the Wnt inhibitors. Methylation analyses demonstrated that CpG islands of SFRP-1 and Axin-2 were methylated, whereas the promoters of DKK-1, DKK-3 and WIF-1 were unmethylated in four NET cells. Aberrant methylation of SFRP-1 was particularly observed in most of clinical NET tissues. In addition, the repression of these unmethylated genes was associated with histone H3 lysine 9 dimethylation (H3K9me2) in BON cells. Together, 5-aza-CdR treatment inhibited cell proliferation and decreased the protein levels of H3K9me2 and G9a. Moreover, a novel G9a inhibitor, UNC0638, suppressed BON cell proliferation through inhibition of Wnt/β-catenin pathway. Overexpression of the inhibitory genes, particularly SFRP-1 and WIF-1 in BON cells, resulted in suppression of anchorage-independent growth and inhibition of tumor growth in mice. Our findings suggest that aberrant Wnt/β-catenin signaling, through either mutations or epigenetic silencing of Wnt antagonists, contributes to the pathogenesis and growth of NETs and have important clinical implications for the prognosis and treatment of NETs.
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Affiliation(s)
- Ji Tae Kim
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
- Department of Surgery, University of Kentucky, Lexington, KY, USA
| | - Jing Li
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
- Department of Surgery, University of Kentucky, Lexington, KY, USA
| | - Eun Ryoung Jang
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, USA
| | - Pat Gulhati
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
- Department of Surgery, University of Kentucky, Lexington, KY, USA
- MD/PhD Program, University of Texas Medical Branch, Galveston, TX, USA
| | - Piotr G. Rychahou
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
- Department of Surgery, University of Kentucky, Lexington, KY, USA
| | - Dana L. Napier
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
- Department of Pathology, University of Kentucky, Lexington, KY, USA
| | - Chi Wang
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
| | - Heidi L. Weiss
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
| | - Eun Y. Lee
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
- Department of Pathology, University of Kentucky, Lexington, KY, USA
| | - Lowell Anthony
- Department of Internal Medicine, University of Kentucky, Lexington, KY, USA and
| | | | - Chunming Liu
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, USA
| | - B.Mark Evers
- Markey Cancer Center, University of Kentucky, Lexington, KY, USA
- Department of Surgery, University of Kentucky, Lexington, KY, USA
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Chan JA, Mayer RJ, Jackson N, Malinowski P, Regan E, Kulke MH. Phase I study of sorafenib in combination with everolimus (RAD001) in patients with advanced neuroendocrine tumors. Cancer Chemother Pharmacol 2013; 71:1241-6. [PMID: 23475104 DOI: 10.1007/s00280-013-2118-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Accepted: 02/05/2013] [Indexed: 12/14/2022]
Abstract
PURPOSE Sorafenib and everolimus are both active against neuroendocrine tumors (NET). Because of potential synergy between VEGF pathway and mTOR inhibitors, we performed a phase I study to evaluate the safety and feasibility of combining sorafenib and everolimus in patients with advanced NET. METHODS Patients were treated with everolimus 10 mg daily in combination with sorafenib (dose level 1: 200 mg twice daily; dose level 2: 200 mg per morning, 400 mg per evening) using standard phase I dose escalation design. Dose-limiting toxicity (DLT) was defined within the first cycle (28 days) of therapy. Treatment was continued until tumor progression, unacceptable toxicity, or withdrawal of consent. Twelve additional patients were treated at the maximum tolerated dose (MTD) level to further characterize safety and a preliminary assessment of activity. RESULTS One patient in Cohort 1 experienced DLT (grade 3 skin rash); the cohort was expanded to 6 patients with no further DLTs. All 3 patients in Cohort 2 experienced DLT, consisting of thrombocytopenia, hand-foot skin reaction, and rash/allergic reaction. Sorafenib 200 mg twice daily in combination with everolimus 10 mg daily was established as the MTD. Independently reviewed best objective responses revealed that 62 % of patients had some degree of tumor shrinkage. By RECIST, we observed partial response in 1 patient, stable disease in 13 patients, and progressive disease in 3 patients. CONCLUSION Sorafenib 200 mg twice daily with everolimus 10 mg daily represents the MTD of this combination in patients with advanced NET. While the combination is active, toxicity concerns may preclude more widespread use.
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Affiliation(s)
- Jennifer A Chan
- Department of Medical Oncology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215, USA.
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Silva SR, Zaytseva YY, Jackson LN, Lee EY, Weiss HL, Bowen KA, Townsend CM, Evers BM. The effect of PTEN on serotonin synthesis and secretion from the carcinoid cell line BON. Anticancer Res 2011; 31:1153-60. [PMID: 21508359 PMCID: PMC3160779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
BACKGROUND Carcinoid tumors are associated with the carcinoid syndrome, a set of symptoms resulting from the peptide and amine products, including serotonin, secreted from the cancer cells. The purpose of this study was to investigate the relationship between the phosphatidylinositol-3-kinase/protein kinase B (PI3K/Akt) inhibitor PTEN (phosphatase and tensin homolog deleted on chromosome ten) and serotonin synthesis and secretion in the carcinoid cancer cell line BON. MATERIALS AND METHODS PTEN was inhibited by pharmacological and molecular approaches, and the resultant secretion of serotonin and expression of tryptophan hydroxylase 1 (TPH1), the rate-limiting enzyme in serotonin synthesis, was assessed. RESULTS Inhibition of PTEN in vitro, with concomitant increased Akt signaling, resulted in decreased secretion of serotonin, as well as decreased serotonin synthesis, as confirmed by reduced expression of TPH1. Inhibition of PTEN in BON cells in an animal model resulted in decreased serum serotonin. CONCLUSION By inhibiting signaling through Akt, PTEN indirectly promotes serotonin synthesis and secretion.
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Affiliation(s)
- Scott R. Silva
- Department of Surgery, The University of Kentucky, Lexington, Kentucky
- Lucille P. Markey Cancer Center, The University of Kentucky, Lexington, Kentucky
| | | | - Lindsey N. Jackson
- Department of Surgery, The University of Texas Medical Branch, Galveston, Texas
| | - Eun Y. Lee
- Lucille P. Markey Cancer Center, The University of Kentucky, Lexington, Kentucky
- Department of Pathology, The University of Kentucky, Lexington, Kentucky
| | - Heidi L. Weiss
- Department of Surgery, The University of Kentucky, Lexington, Kentucky
- Lucille P. Markey Cancer Center, The University of Kentucky, Lexington, Kentucky
| | - Kanika A. Bowen
- Department of Surgery, The University of Texas Medical Branch, Galveston, Texas
| | | | - B. Mark Evers
- Department of Surgery, The University of Kentucky, Lexington, Kentucky
- Lucille P. Markey Cancer Center, The University of Kentucky, Lexington, Kentucky
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Silva SR, Bowen KA, Rychahou PG, Jackson LN, Weiss HL, Lee EY, Townsend CM, Evers BM. VEGFR-2 expression in carcinoid cancer cells and its role in tumor growth and metastasis. Int J Cancer 2011; 128:1045-56. [PMID: 20473929 DOI: 10.1002/ijc.25441] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Carcinoid tumors are slow growing and highly vascular neuroendocrine neoplasms that are increasing in incidence. Previously, we showed that carcinoid tumors express vascular endothelial growth factor receptor 2 (VEGFR-2) in the epithelial compartment of carcinoid tumor sections; yet, its role is not completely understood. The purpose of our study was to: (i) assess the expression of VEGFR-2 in the novel human carcinoid cell line BON, (ii) to determine the role of PI3K/Akt signaling on VEGFR-2 expression and (iii) to assess the effect of VEGFR-2 on BON cell invasion, migration and proliferation. We found that, although VEGFR-2 is expressed in BON cells, reduction in VEGFR-2 expression actually enhanced proliferation, invasion, and migration of the BON cell line. Also, expression of VEGFR-2 was inversely related to PI3K signaling. Carcinoid liver metastases in mice demonstrated decreased VEGFR-2 expression. Furthermore, the expression of a truncated, soluble form of VEGFR-2 (sVEGFR-2), a protein demonstrated to inhibit cell growth, was detected in BON cells. The presence of VEGFR-2 in the epithelial component of carcinoid tumors and in the BON cell line suggests an alternate role for VEGFR-2, in addition to its well-defined role in angiogenesis. The expression of sVEGFR-2 may explain the inverse relationship between VEGFR-2 expression and PI3K/Akt signaling and the inhibitory effect VEGFR-2 has on BON cell proliferation, migration and invasion.
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Affiliation(s)
- Scott R Silva
- Department of Surgery, The University of Texas Medical Branch, Galveston, TX, USA
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Lawrence B, Gustafsson BI, Kidd M, Modlin I. New pharmacologic therapies for gastroenteropancreatic neuroendocrine tumors. Gastroenterol Clin North Am 2010; 39:615-28. [PMID: 20951920 PMCID: PMC3634348 DOI: 10.1016/j.gtc.2010.08.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Successful treatment of unresectable and metastatic gastroenteropancreatic neuroendocrine tumors (GEP-NETs) requires the thoughtful choice of systemic therapy as a component of a multidisciplinary therapeutic approach. The role of somatostatin analogues is established in symptom relief, but the efficacy of interferon and radiopeptide targeted therapy is not clear. The utility of a variety of tyrosine kinase and antiangiogenic agents is variable and under investigation, whereas the role of cytotoxic chemotherapy in poorly differentiated GEP-NETs is accepted. Overall, the ideal treatment of more indolent tumors is less certain. Reassessments of the GEP-NET pathology classification has provided improved logic for the role of a variety of agents, whereas the precise positioning of many new agents that target molecular pathways of angiogenesis and proliferation is under examination. This article describes the current options for systemic therapy for GEP-NETs within the framework of the current World Health Organization classification system.
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Affiliation(s)
- Ben Lawrence
- Department of Medical Oncology, Auckland City Hospital, Private Bag 92024, Auckland, New Zealand. Ph (+649)367-0000
- GI Pathobiology Research Group, Yale University School of Medicine, PO Box 208602, New Haven, Connecticut, USA. Ph (203)785-5429. Fax (203)737-4067
| | - Bjorn I. Gustafsson
- Department of Gastroenterology, Institute for Cancer Research and Molecular Medicine, NTNU, and Department of Gastroenterology, St Olavs University Hospital, Prinsesse Kristinas gate 1. Ph (+47)72825160, 7006 Trondheim, Norway
| | - Mark Kidd
- GI Pathobiology Research Group, Yale University School of Medicine, PO Box 208602, New Haven, Connecticut, USA. Ph (203)785-5429. Fax (203)737-4067
| | - Irvin Modlin
- GI Pathobiology Research Group, Yale University School of Medicine, PO Box 208602, New Haven, Connecticut, USA. Ph (203)785-5429. Fax (203)737-4067
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