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O'Connor JM, Marmissolle F, Bestani C, Pesce V, Belli S, Dominichini E, Mendez G, Price P, Giacomi N, Pairola A, Loria FS, Huertas E, Martin C, Patane K, Poleri C, Rosenberg M, Cabanne A, Kujaruk M, Caino A, Zamora V, Mariani J, Dioca M, Parma P, Podesta G, Andriani O, Gondolesi G, Roca E. Observational study of patients with gastroenteropancreatic and bronchial neuroendocrine tumors in Argentina: Results from the large database of a multidisciplinary group clinical multicenter study. Mol Clin Oncol 2014; 2:673-684. [PMID: 25054030 DOI: 10.3892/mco.2014.332] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Accepted: 02/25/2014] [Indexed: 12/15/2022] Open
Abstract
Neuroendocrine tumors (NET) include a spectrum of malignancies arising from neuroendocrine cells throughout the body. The objective of this clinical investigation of retrospectively and prospectively collected data was to describe the prevalence, demographic data, clinical symptoms and methods of diagnosis of NET and the treatment and long-term follow-up of patients with NET. Data were provided by the participating centers and assessed for consistency by internal reviewers. All the cases were centrally evaluated (when necessary) by the pathologists in our group. The tissue samples were reviewed by hematoxylin and eosin and immunohistochemical staining techniques to confirm the diagnosis of NET. In total, 532 cases were documented: 461 gastroenteropancreatic-NET (GEP-NET) and 71 bronchial NET (BNET). All the tumors were immunohistochemically defined according to the World Health Organization (WHO) and European Neuroendocrine Tumor Society criteria. The most common initial symptoms in GEP-NET were abdominal pain, diarrhea, bowel obstruction, flushing, gastrointestinal bleeding and weight loss. The most common tumor types were carcinoid (58.0%), non-functional pancreatic tumor (23.0%), metastatic NET of unknown primary (16.0%) and functional pancreatic tumor (3.0%). Of the BNET, 89.0% were typical and 11.0% atypical carcinoids. Of the patients with GEP-NET, 59.2% had distant metastasis at diagnosis. The locations of the primary tumors in GEP-NET were the small bowel (26.9%), pancreas (25.2%), colon-rectum (12.4%), appendix (7.6%), stomach (6.9%), esophagus (2.8%), duodenum (2.0%) and unknown primary (16.3%). The histological subtypes based on the WHO classification were well-differentiated NET (20.1%), well-differentiated neuroendocrine carcinomas (66.5%) and poorly differentiated neuroendocrine carcinomas (10.3%). Overall, 67.3% of the patients underwent surgery, 41.2% with curative intent and 26.1% for palliative purposes. The 5-year survival rates were 65.1% (95% confidence interval, 58.0-71.4%) in GEP-NET and 100.0% in typical carcinoid of the lung. This observational, non-interventional, longitudinal study aimed to accumulate relevant information regarding the epidemiology, clinical presentation and current practices in the treatment of NET patients in Argentina, providing insight into regional differences and patterns of care in this heterogeneous disease.
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Affiliation(s)
- Juan Manuel O'Connor
- Department of Clinical Oncology, Institute Alexander Fleming, Buenos Aires C1426ANZ, Argentina ; Oncology Unit, Gastroenterology Hospital Bonorino Udaondo, Buenos Aires C1264AAA, Argentina
| | - Fabiana Marmissolle
- SITE, Clinical Oncology, La Plata 1900, Argentina ; Medical Institute Platense, Buenos Aires 1900, Argentina
| | - Claudia Bestani
- Oncology Unit, Gastroenterology Hospital Bonorino Udaondo, Buenos Aires C1264AAA, Argentina
| | - Veronica Pesce
- Oncology Unit, Gastroenterology Hospital Bonorino Udaondo, Buenos Aires C1264AAA, Argentina
| | - Susana Belli
- Department of Clinical Oncology, Institute Alexander Fleming, Buenos Aires C1426ANZ, Argentina
| | - Enzo Dominichini
- Department of Clinical Oncology, Institute Alexander Fleming, Buenos Aires C1426ANZ, Argentina
| | - Guillermo Mendez
- Oncology Unit, Gastroenterology Hospital Bonorino Udaondo, Buenos Aires C1264AAA, Argentina
| | - Paola Price
- Oncology Unit, Gastroenterology Hospital Bonorino Udaondo, Buenos Aires C1264AAA, Argentina
| | - Nora Giacomi
- SITE, Clinical Oncology, La Plata 1900, Argentina
| | - Alejandro Pairola
- Department of Clinical Oncology, Institute Alexander Fleming, Buenos Aires C1426ANZ, Argentina
| | - Fernando Sánchez Loria
- Department of Clinical Oncology, Institute Alexander Fleming, Buenos Aires C1426ANZ, Argentina
| | - Eduardo Huertas
- Department of Clinical Oncology, Institute Alexander Fleming, Buenos Aires C1426ANZ, Argentina
| | - Claudio Martin
- Department of Clinical Oncology, Institute Alexander Fleming, Buenos Aires C1426ANZ, Argentina ; Department of Clinical Oncology and Thoracic Surgery Unit, Respiratory Rehabilitation Hospital María Ferrer, Buenos Aires C1272AAA, Argentina
| | - Karina Patane
- Department of Clinical Oncology, Institute Alexander Fleming, Buenos Aires C1426ANZ, Argentina ; Department of Clinical Oncology and Thoracic Surgery Unit, Respiratory Rehabilitation Hospital María Ferrer, Buenos Aires C1272AAA, Argentina
| | - Claudia Poleri
- Department of Clinical Oncology and Thoracic Surgery Unit, Respiratory Rehabilitation Hospital María Ferrer, Buenos Aires C1272AAA, Argentina
| | - Moises Rosenberg
- Department of Clinical Oncology, Institute Alexander Fleming, Buenos Aires C1426ANZ, Argentina ; Department of Clinical Oncology and Thoracic Surgery Unit, Respiratory Rehabilitation Hospital María Ferrer, Buenos Aires C1272AAA, Argentina
| | - Ana Cabanne
- Oncology Unit, Gastroenterology Hospital Bonorino Udaondo, Buenos Aires C1264AAA, Argentina
| | - Mirta Kujaruk
- Oncology Unit, Gastroenterology Hospital Bonorino Udaondo, Buenos Aires C1264AAA, Argentina
| | - Analia Caino
- SITE, Clinical Oncology, La Plata 1900, Argentina ; Hospital El Cruce, Buenos Aires B1888, Argentina
| | - Victor Zamora
- Oncology Unit, Gastroenterology Hospital Bonorino Udaondo, Buenos Aires C1264AAA, Argentina
| | - Javier Mariani
- Department of Clinical Oncology, Institute Alexander Fleming, Buenos Aires C1426ANZ, Argentina
| | - Mariano Dioca
- Department of Clinical Oncology, Institute A. Roffo, Buenos Aires C1417AAA, Argentina
| | - Patricia Parma
- Department of Clinical Oncology, Institute A. Roffo, Buenos Aires C1417AAA, Argentina
| | - Gustavo Podesta
- Department of Hepatobiliary Pancreatic Disease, Austral University Hospital, Buenos Aires B1629AHJ, Argentina
| | - Oscar Andriani
- Department of Hepatobiliary Pancreatic Disease, Austral University Hospital, Buenos Aires B1629AHJ, Argentina
| | - Gabriel Gondolesi
- Oncology and Hepatobiliary Pancreatic Units, Favaloro Foundation, Buenos Aires C1093AAS, Argentina
| | - Enrique Roca
- Oncology Unit, Gastroenterology Hospital Bonorino Udaondo, Buenos Aires C1264AAA, Argentina
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Rodriguez R, Nademanee A, Fang Y, Dagis A, Sahebi F, Parker P, Snyder D, Smith E, Nakamura R, Pullarkat V, Senitzer D, Zain J, Stein A, Patane K, Forman S. A prospective pilot study of thymoglobulin, cyclosporine (CSA) and MMF as GVHD prophylaxis in unrelated donor (URD) HCT using fludarabine and melphalan (flu/mel) for high-risk patients with hematological malignancies. Biol Blood Marrow Transplant 2006. [DOI: 10.1016/j.bbmt.2005.11.192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
Rabbit skeletal muscle G-actin has been treated to obtain ADP, 1,N6-ethenoadenosine diphosphate (epsilon-ADP), or 1,N6-ethenoadenosine triphosphate (epsilon-ATP) at the nucleotide binding site and either Mg2+ or Ca2+ at high- and moderate-affinity metal binding sites. Apparent rates or rate constants for the displacement of the actin-bound nucleotides by epsilon-ATP or ATP have been obtained by stopped-flow measurements at pH 8 and 20 degrees C of the fluorescence difference between bound and free epsilon-ATP or epsilon-ADP. In the presence of Ca2+, displacement of ADP by epsilon-ATP or epsilon-ADP by ATP is a biphasic process, but in the presence of low (less than 10 microM) Mg2+ concentrations, it is a slow first-order process. At high levels of Mg2+ (greater than 50 microM), low ADP concentrations displace epsilon-ATP from G-actin as a consequence of Mg2+ binding to moderate-affinity sites on the actin. Displacement of epsilon-ATP by ATP in the presence of either Ca2+ or Mg2+ is slow at low ATP concentrations, but the rate is increased by high ATP concentrations. Using ethylene glycol bis(beta-aminoethyl ether)-N,N,N',N'-tetraacetic acid, we find that nucleotide exchange is affected differently by the removal of Ca2+ from the high-affinity site compared to Ca2+ removal from moderate-affinity sites. A mechanism for the displacement reaction is proposed in which there are two forms of an actin-ADP complex and metal binding influences the ratio of these forms as well as the binding of ATP.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- C Frieden
- Department of Biological Chemistry, Washington University School of Medicine, St. Louis, Missouri 63110
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Abstract
The role of adenosine 5'-triphosphate (ATP) in the Mg2+-induced conformational change of rabbit skeletal muscle G-actin has been investigated by comparing actin containing bound ADP with actin containing bound ATP. As previously described [Frieden, C. (1982) J. Biol. Chem. 257, 2882-2886], N-acetyl-N'-(5-sulfo-1-naphthyl)ethylenediamine-labeled G-actin containing ATP undergoes a time-dependent Mg2+-induced fluorescence change that reflects a conformational change in the actin. Addition of Mg2+ to labeled G-actin containing ADP gives no fluorescence change, suggesting that the conformational change does not occur. The fluorescence change can be restored on the addition of ATP. Examination of the time courses of these experiments suggests that ATP must replace ADP prior to the Mg2+-induced change. The Mg2+-induced polymerization of actin containing ADP is extraordinarily slow compared to that of actin containing ATP. The lack of the Mg2+-induced conformational change, which is an essential step in the Mg2+-induced polymerization, is probably the cause for the very slow polymerization of actin containing ADP. On the other hand, at 20 degrees C, at pH 8, and in 2 mM Mg2+, the elongation rate from the slow growing end of an actin filament, measured by using the protein brevin to block growth at the fast growing end, is only 4 times slower for actin containing ADP than for actin containing ATP.
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