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Ramirez JL, Carvalho-Costa LF, Venere PC, Carvalho DC, Troy WP, Galetti PM. Testing monophyly of the freshwater fish Leporinus (Characiformes, Anostomidae) through molecular analysis. J Fish Biol 2016; 88:1204-1214. [PMID: 26822755 DOI: 10.1111/jfb.12906] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Accepted: 12/18/2015] [Indexed: 06/05/2023]
Abstract
Monophyly of the genus Leporinus (Characiformes: Anostomidae) was tested by sequencing and analysing a total of 4732 bp, including two mitochondrial [cytochrome oxidase subunit 1 (CO1) and cytochrome b (Cytb)] and three nuclear [myosin heavy chain 6 cardiac muscle alpha (Myh6), recombination activating gene 1 (RAG1) and recombination activating gene 2 (RAG2)] loci for 22 species of Leporinus, or c. 25% of all described species in the genus. Phylogenetic tree analyses (maximum parsimony, maximum likelihood and Bayesian species tree) indicate Leporinus to be paraphyletic, with monophyly being rejected by both Kishino-Hasegawa and Shimodaira-Hasegawa tests. The sequenced species of Leporinus are distributed across five clades that are interleaved among other anostomid genera. Several taxonomic changes are suggested as being necessary to restore monophyly for the group. The clade containing the type species, Leporinus fasciatus, should be considered Leporinus sensu stricto and at least three new genera should be described for other species currently considered part of Leporinus.
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Affiliation(s)
- J L Ramirez
- Laboratório de Biodiversidade Molecular e Conservação, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brasil
| | - L F Carvalho-Costa
- Departamento de Biologia, Universidade Federal de Maranhão, São Luis, MA, Brasil
| | - P C Venere
- Laboratório de Citogenética e Genética Animal, Instituto de Biociências, Universidade Federal do Mato Grosso, Cuiabá, MT, Brasil
| | - D C Carvalho
- Laboratório de Genética da Conservação, Programa de Pós-graduação em Zoologia de Vertebrados, PUC Minas, Belo Horizonte, MG, Brasil
| | - W P Troy
- Laboratório de Ictiologia e Citogenética Animal, Universidade do Estado de Mato Grosso (UNEMAT), campus de Tangará da Serra, Cáceres, MT, Brasil
| | - P M Galetti
- Laboratório de Biodiversidade Molecular e Conservação, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brasil
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Moran T, Wei J, Cobo M, Qian X, Domine M, Zou Z, Bover I, Wang L, Provencio M, Yu L, Chaib I, You C, Massuti B, Song Y, Vergnenegre A, Lu H, Lopez-Vivanco G, Hu W, Robinet G, Yan J, Insa A, Xu X, Majem M, Chen X, de Las Peñas R, Karachaliou N, Sala MA, Wu Q, Isla D, Zhou Y, Baize N, Zhang F, Garde J, Germonpre P, Rauh S, ALHusaini H, Sanchez-Ronco M, Drozdowskyj A, Sanchez JJ, Camps C, Liu B, Rosell R, Colinet B, De Grève J, Germonpré P, Chen H, Chen X, Du J, Gao Y, Hu J, Hu W, Kong W, Li L, Li R, Li X, Liu B, Liu J, Lu H, Qian X, Ren W, Song Y, Wang L, Wei J, Wen L, Wu Q, Xiao X, Xu X, Yan J, Yang J, Yang M, Yang Y, Yin J, You C, Yu L, Yue X, Zhang F, Zhang J, Zhou Y, Zhu L, Zou Z, Baize N, Bombaron P, Chouaid C, Dansin E, Fournel P, Fraboulet G, Gervais R, Hominal S, Kahlout S, Lecaer H, Lena H, LeTreut J, Locher C, Molinier O, Monnet I, Oliviero G, Robinet G, Schoot R, Thomas P, Vergnènegre A, Berchem G, Rauh S, Al Husaini H, Aparisi F, Arriola E, Ballesteros I, Barneto I, Bernabé R, Blasco A, Bosch-Barrera J, Bover I, Calvo de Juan V, Camps C, Carcereny E, Catot S, Cobo M, De Las Peñas R, Dómine M, Felip E, García-Campelo MR, García-Girón C, García-Gómez R, Garcia-Sevila R, Garde J, Gasco A, Gil J, González-Larriba JL, Hernando-Polo S, Jantus E, Insa A, Isla D, Jiménez B, Lianes P, López-López R, López-Martín A, López-Vivanco G, Macias JA, Majem M, Marti-Ciriquian JL, Massuti B, Montoyo R, Morales-Espinosa D, Morán T, Moreno MA, Pallares C, Parera M, Pérez-Carrión R, Porta R, Provencio M, Reguart N, Rosell R, Rosillo F, Sala MA, Sanchez JM, Sullivan I, Terrasa J, Trigo JM, Valdivia J, Viñolas N, Viteri S, Botia-Castillo M, Mate JL, Perez-Cano M, Ramirez JL, Sanchez-Rodriguez B, Taron M, Tierno-Garcia M, Mijangos E, Ocaña J, Pereira E, Shao J, Sun X, O'Brate R. Two biomarker-directed randomized trials in European and Chinese patients with nonsmall-cell lung cancer: the BRCA1-RAP80 Expression Customization (BREC) studies. Ann Oncol 2014; 25:2147-2155. [PMID: 25164908 DOI: 10.1093/annonc/mdu389] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND In a Spanish Lung Cancer Group (SLCG) phase II trial, the combination of BRCA1 and receptor-associated protein 80 (RAP80) expression was significantly associated with outcome in Caucasian patients with nonsmall-cell lung cancer (NSCLC). The SLCG therefore undertook an industry-independent collaborative randomized phase III trial comparing nonselected cisplatin-based chemotherapy with therapy customized according to BRCA1/RAP80 expression. An analogous randomized phase II trial was carried out in China under the auspices of the SLCG to evaluate the effect of BRCA1/RAP80 expression in Asian patients. PATIENTS AND METHODS Eligibility criteria included stage IIIB-IV NSCLC and sufficient tumor specimen for molecular analysis. Randomization to the control or experimental arm was 1 : 1 in the SLCG trial and 1 : 3 in the Chinese trial. In both trials, patients in the control arm received docetaxel/cisplatin; in the experimental arm, patients with low RAP80 expression received gemcitabine/cisplatin, those with intermediate/high RAP80 expression and low/intermediate BRCA1 expression received docetaxel/cisplatin, and those with intermediate/high RAP80 expression and high BRCA1 expression received docetaxel alone. The primary end point was progression-free survival (PFS). RESULTS Two hundred and seventy-nine patients in the SLCG trial and 124 in the Chinese trial were assessable for PFS. PFS in the control and experimental arms in the SLCG trial was 5.49 and 4.38 months, respectively [log rank P = 0.07; hazard ratio (HR) 1.28; P = 0.03]. In the Chinese trial, PFS was 4.74 and 3.78 months, respectively (log rank P = 0.82; HR 0.95; P = 0.82). CONCLUSION Accrual was prematurely closed on the SLCG trial due to the absence of clinical benefit in the experimental over the control arm. However, the BREC studies provide proof of concept that an international, nonindustry, biomarker-directed trial is feasible. Thanks to the groundwork laid by these studies, we expect that ongoing further research on alternative biomarkers to elucidate DNA repair mechanisms will help define novel therapeutic approaches. TRIAL REGISTRATION NCT00617656/GECP-BREC and ChiCTR-TRC-12001860/BREC-CHINA.
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Affiliation(s)
- T Moran
- Catalan Institute of Oncology, Medical Oncology Service, Hospital Germans Trias i Pujol, Badalona, Spain
| | - J Wei
- The Comprehensive Cancer Centre, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - M Cobo
- Medical Oncology Service, Hospital Carlos Haya, Malaga
| | - X Qian
- The Comprehensive Cancer Centre, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - M Domine
- Medical Oncology Service, Fundacion Jimenez Diaz, Madrid
| | - Z Zou
- The Comprehensive Cancer Centre, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - I Bover
- Medical Oncology Service, Hospital Son Llatzer, Palma de Mallorca
| | - L Wang
- The Comprehensive Cancer Centre, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - M Provencio
- Medical Oncology Service, Hospital Puerta de Hierro, Madrid, Spain
| | - L Yu
- The Comprehensive Cancer Centre, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - I Chaib
- Catalan Institute of Oncology, Medical Oncology Service, Hospital Germans Trias i Pujol, Badalona, Spain
| | - C You
- Department of Oncology, Suqian General Hospital, Suqian, China
| | - B Massuti
- Medical Oncology Service, Hospital General de Alicante, Alicante, Spain
| | - Y Song
- Department of Pneumology, Jinling Hospital, Nanjing, China
| | - A Vergnenegre
- Service de Pathologie Respiratoire et d'Allergologie, CHU Limoges, Limoges, France
| | - H Lu
- Department of Pneumology, Taizhou General Hospital, Taizhou, China
| | | | - W Hu
- The Comprehensive Cancer Centre, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - G Robinet
- Service Pneumologie, CHU Brest, Brest, France
| | - J Yan
- The Comprehensive Cancer Centre, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - A Insa
- Medical Oncology Service, Hospital Clinico de Valencia, Valencia, Spain
| | - X Xu
- Department of Pneumology, Northern Jiangsu People's Hospital, Yangzhou, China
| | - M Majem
- Medical Oncology Service, Hospital Sant Pau, Barcelona, Spain
| | - X Chen
- Department of Oncology, Huaian General Hospital, Huaian, China
| | - R de Las Peñas
- Medical Oncology Service, Hospital Provincial de Castellon, Castellon, Spain
| | - N Karachaliou
- Translational Research Unit, Dr Rosell Oncology Institute, Quiron-Dexeus University Hospital, Barcelona
| | - M A Sala
- Medical Oncology Service, Hospital de Basurto, Bilbao, Spain
| | - Q Wu
- Department of Oncology, Yixin General Hospital, Yixin, China
| | - D Isla
- Medical Oncology Service, Hospital Lozano Blesa, Zaragoza, Spain
| | - Y Zhou
- Department of Oncology, Yixin General Hospital, Yixin, China
| | - N Baize
- Department de Pneumologie, CHU Angers, Angers, France
| | - F Zhang
- Department of Oncology, Maanshan General Hospital, Maanshan, China
| | - J Garde
- Medical Oncology Service, Hospital Arnau de Vilanova, Valencia, Spain
| | - P Germonpre
- Department of Pulmonary Medicine, Antwerp University Hospital, Edegem, Belgium
| | - S Rauh
- Department of Internal Medicine and Oncology, Centre Hospitalier Emile Mayrisch, Luxembourg, Luxembourg
| | - H ALHusaini
- Oncology Center, King Faisal Cancer Center, Riyadh, Saudi Arabia
| | - M Sanchez-Ronco
- Department of Health and Medicosocial Sciences, University of Alcala, Madrid
| | | | - J J Sanchez
- Department of Preventive Medicine, Autonomous University of Madrid, Madrid
| | - C Camps
- Medical Oncology Service, Hospital General de Valencia, Valencia
| | - B Liu
- The Comprehensive Cancer Centre, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - R Rosell
- Catalan Institute of Oncology, Cancer Biology and Precision Medicine Program, Hospital Germans Trias i Pujol, Badalona; MORe Foundation, Barcelona, Spain; Cancer Therapeutic Innovation Group, New York,USA.
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Wei J, Ramirez JL, Taron M, Sanchez JJ, Benlloch S, Rosell R, Botia M, Perez-Cano M, Mendez P, Tierno M, Queralt C, de Aguirre I, Sanchez B, Martinez A, Buges C, Bosch J, Massuti B, Camps C, Sanchez JM, Moran T. DAB2 interactive protein (DAB2IP) methylation in serum DNA of non-small cell lung cancer (NSCLC) patients (p) with epidermal growth factor receptor (EGFR) mutations. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.7593] [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: 11/20/2022] Open
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Rosell R, Ramirez JL, Sanchez-Ronco M, Isla D, Moran T, Cobo M, Massuti B, Taron M, Carbone D, De Aguirre I. Blood-based CHRNA3 single nucleotide polymorphisms (SNPs) and outcome in advanced non-small cell lung cancer (NSCLC) patients (p). J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.8033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
8033 Background: Nicotonic acetylcholine receptors (nAChRs) are associated with resistance to gemcitabine (gem), cisplatin (cis) and paclitaxel in NSCLC cell lines. Three SNPs of CHRNA3, CHRNA5 and LOC123688 increase lung cancer risk. These SNPs may have influenced outcome in p treated in our phase III trial (Cobo et al. J Clin Oncol 2007;25:2747–54). Methods: Stage IV NSCLC p were treated with customized chemotherapy based on ERCC1 mRNA expression. p in the control arm received docetaxel (doc)/cis; p in the genotypic arm with low ERCC1 levels (low genotypic group [LG]) received doc/cis; p in the genotypic arm with high ERCC1 levels (high genotypic group [HG]) received doc/gem. DNA was extracted from lymphocytes, and CHRNA3 (rs1051730), CHRNA5 (rs16969968) and LOC123688 (rs8034191) SNPs were genotyped with the Taqman allele discrimination assay. Results: A significant interaction was found for CHRNA3 and PS (P = 0.02). In p with PS 0, CT p had a better response than both CC (P = 0.01) and TT (P = 0.02) p, and LG p also had a better response (P = 0.01). When the CHRNA3 genotype was added in the multivariate analysis for progression-free survival (PFS), an improvement was observed in the LG in PS 0 p (P = 0.02). PS 0 p in the LG with the CT genotype attained an 84% response, 12.1-month PFS, and 19-month median survival (MS) ( Table ). Conclusions: CHRNA3 genotyping can improve customized chemotherapy based on tumor ERCC1 mRNA in stage IV NSCLC p with PS 0. [Table: see text] No significant financial relationships to disclose.
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Affiliation(s)
- R. Rosell
- ICO, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain; University of Alcala de Henares, Madrid, Spain; Hospital Lozano Blesa, Zaragoza, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Hospital General de Alicante, Alicante, Spain; Vanderbilt University Cancer Center, Nashville, TN
| | - J. L. Ramirez
- ICO, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain; University of Alcala de Henares, Madrid, Spain; Hospital Lozano Blesa, Zaragoza, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Hospital General de Alicante, Alicante, Spain; Vanderbilt University Cancer Center, Nashville, TN
| | - M. Sanchez-Ronco
- ICO, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain; University of Alcala de Henares, Madrid, Spain; Hospital Lozano Blesa, Zaragoza, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Hospital General de Alicante, Alicante, Spain; Vanderbilt University Cancer Center, Nashville, TN
| | - D. Isla
- ICO, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain; University of Alcala de Henares, Madrid, Spain; Hospital Lozano Blesa, Zaragoza, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Hospital General de Alicante, Alicante, Spain; Vanderbilt University Cancer Center, Nashville, TN
| | - T. Moran
- ICO, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain; University of Alcala de Henares, Madrid, Spain; Hospital Lozano Blesa, Zaragoza, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Hospital General de Alicante, Alicante, Spain; Vanderbilt University Cancer Center, Nashville, TN
| | - M. Cobo
- ICO, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain; University of Alcala de Henares, Madrid, Spain; Hospital Lozano Blesa, Zaragoza, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Hospital General de Alicante, Alicante, Spain; Vanderbilt University Cancer Center, Nashville, TN
| | - B. Massuti
- ICO, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain; University of Alcala de Henares, Madrid, Spain; Hospital Lozano Blesa, Zaragoza, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Hospital General de Alicante, Alicante, Spain; Vanderbilt University Cancer Center, Nashville, TN
| | - M. Taron
- ICO, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain; University of Alcala de Henares, Madrid, Spain; Hospital Lozano Blesa, Zaragoza, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Hospital General de Alicante, Alicante, Spain; Vanderbilt University Cancer Center, Nashville, TN
| | - D. Carbone
- ICO, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain; University of Alcala de Henares, Madrid, Spain; Hospital Lozano Blesa, Zaragoza, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Hospital General de Alicante, Alicante, Spain; Vanderbilt University Cancer Center, Nashville, TN
| | - I. De Aguirre
- ICO, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain; University of Alcala de Henares, Madrid, Spain; Hospital Lozano Blesa, Zaragoza, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Hospital General de Alicante, Alicante, Spain; Vanderbilt University Cancer Center, Nashville, TN
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Reguart N, Porta R, Provencio M, Cardenal F, Cuello M, Ramirez JL, Mayo C, Lianes P, Taron M, Rosell R. 14–3-3 σ and checkpoint with forkhead and ring finger (CHFR) methylation in serum in erlotinib-treated non-small-cell lung cancer (NSCLC) patients (p) with EGFR mutations. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.7600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
7600 Background: 14–3-3 proteins have 130 potential binding partners, including Cbl. 14–3-3 expression can prevent mutant EGFR binding to Cbl, impairing ubiquitination and endocytosis. 14–3-3s is frequently methylated in NSCLC; we hypothesized that in the presence of EGFR mutations, methylated 14–3-3s could permit the formation of the EGFR-Cbl complex. CHFR is a checkpoint that delays entry into metaphase in response to mitotic stress. Methods: 73 stage IV NSCLC p with EGFR exon 19 deletion or exon 21 L858R mutation received first- or second-line erlotinib single therapy. 14–3-3s and CHFR methylation was examined in the baseline serum of these p. Results: Median age, 63 (range, 26–83); females, 48 p (65.8%); Caucasian, 72 p, Asian, 1 p; never-smokers, 45 p, ex-smokers, 21 p, smokers, 7 p; adenocarcinoma, 64 p, large cell carcinoma, 9. PS: 0, 19 p, 1, 42 p, 2–3, 12 p. 14–3-3s was methylated in 39.7% and CHFR in 42.5% of p. No differences in p characteristics were observed according to methylation status. Complete response was observed in 11.1% of p, and partial response in 75.4%. Overall response was 86.5%. There was a trend toward a higher response rate in p with unmethylated CHFR (94.4% vs 76.6%; P=ns). Overall median time to progression (TTP) and survival (MS) have not been reached either in first- or second-line. However, when split according to methylation status, there was a trend toward better TTP and MS in both first- and second-line in p with methylated 14–3-3s. TTP in second-line in p with methylated 14–3-3s has not been reached, while it was 10.8 months (m) for p with unmethylated 14–3-3s (P=ns). TTP in second-line in p with methylated CHFR was 5.2 m but was not reached for p with unmethylated CHFR (P=0.05). Conclusions: Methylated 14–3-3s can permit Cbl binding to mutant EGFR and predict longer-lasting response to erlotinib in p with EGFR mutations. The precise role of CHFR warrants further research. Complete data will be presented. No significant financial relationships to disclose.
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Affiliation(s)
- N. Reguart
- ICO, Hospital Germans Trias i Pujol, Badalona, Spain; ICO, Hospital Josep Trueta, Girona, Spain; Clinica Puerta del Hierro, Madrid, Spain; ICO, Hospital Duran i Reynals, Barcelona, Spain; Hospital de Mataro, Barcelona, Spain
| | - R. Porta
- ICO, Hospital Germans Trias i Pujol, Badalona, Spain; ICO, Hospital Josep Trueta, Girona, Spain; Clinica Puerta del Hierro, Madrid, Spain; ICO, Hospital Duran i Reynals, Barcelona, Spain; Hospital de Mataro, Barcelona, Spain
| | - M. Provencio
- ICO, Hospital Germans Trias i Pujol, Badalona, Spain; ICO, Hospital Josep Trueta, Girona, Spain; Clinica Puerta del Hierro, Madrid, Spain; ICO, Hospital Duran i Reynals, Barcelona, Spain; Hospital de Mataro, Barcelona, Spain
| | - F. Cardenal
- ICO, Hospital Germans Trias i Pujol, Badalona, Spain; ICO, Hospital Josep Trueta, Girona, Spain; Clinica Puerta del Hierro, Madrid, Spain; ICO, Hospital Duran i Reynals, Barcelona, Spain; Hospital de Mataro, Barcelona, Spain
| | - M. Cuello
- ICO, Hospital Germans Trias i Pujol, Badalona, Spain; ICO, Hospital Josep Trueta, Girona, Spain; Clinica Puerta del Hierro, Madrid, Spain; ICO, Hospital Duran i Reynals, Barcelona, Spain; Hospital de Mataro, Barcelona, Spain
| | - J. L. Ramirez
- ICO, Hospital Germans Trias i Pujol, Badalona, Spain; ICO, Hospital Josep Trueta, Girona, Spain; Clinica Puerta del Hierro, Madrid, Spain; ICO, Hospital Duran i Reynals, Barcelona, Spain; Hospital de Mataro, Barcelona, Spain
| | - C. Mayo
- ICO, Hospital Germans Trias i Pujol, Badalona, Spain; ICO, Hospital Josep Trueta, Girona, Spain; Clinica Puerta del Hierro, Madrid, Spain; ICO, Hospital Duran i Reynals, Barcelona, Spain; Hospital de Mataro, Barcelona, Spain
| | - P. Lianes
- ICO, Hospital Germans Trias i Pujol, Badalona, Spain; ICO, Hospital Josep Trueta, Girona, Spain; Clinica Puerta del Hierro, Madrid, Spain; ICO, Hospital Duran i Reynals, Barcelona, Spain; Hospital de Mataro, Barcelona, Spain
| | - M. Taron
- ICO, Hospital Germans Trias i Pujol, Badalona, Spain; ICO, Hospital Josep Trueta, Girona, Spain; Clinica Puerta del Hierro, Madrid, Spain; ICO, Hospital Duran i Reynals, Barcelona, Spain; Hospital de Mataro, Barcelona, Spain
| | - R. Rosell
- ICO, Hospital Germans Trias i Pujol, Badalona, Spain; ICO, Hospital Josep Trueta, Girona, Spain; Clinica Puerta del Hierro, Madrid, Spain; ICO, Hospital Duran i Reynals, Barcelona, Spain; Hospital de Mataro, Barcelona, Spain
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Ramirez JL, Rosell R, Taron M, Gupta J, Alberola V, de las Penas R, Sanchez JM, Moran T, Isla D, Catot S. 14-3-3 σ (σ) methylation (M) in pre-treatment serum DNA of cisplatin (cis)/gemcitabine (gem)-treated non-small-cell lung cancer (NSCLC). J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.7042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- J. L. Ramirez
- Inst Catala d’Oncologia, Badalona, Spain; Hosp Arnau de Vilanova de Valencia, Valencia, Spain; Hosp Provincial de Castellon, Castellon, Spain; Hosp Clinico Univ Lozano Blesa, Zaragoza, Spain
| | - R. Rosell
- Inst Catala d’Oncologia, Badalona, Spain; Hosp Arnau de Vilanova de Valencia, Valencia, Spain; Hosp Provincial de Castellon, Castellon, Spain; Hosp Clinico Univ Lozano Blesa, Zaragoza, Spain
| | - M. Taron
- Inst Catala d’Oncologia, Badalona, Spain; Hosp Arnau de Vilanova de Valencia, Valencia, Spain; Hosp Provincial de Castellon, Castellon, Spain; Hosp Clinico Univ Lozano Blesa, Zaragoza, Spain
| | - J. Gupta
- Inst Catala d’Oncologia, Badalona, Spain; Hosp Arnau de Vilanova de Valencia, Valencia, Spain; Hosp Provincial de Castellon, Castellon, Spain; Hosp Clinico Univ Lozano Blesa, Zaragoza, Spain
| | - V. Alberola
- Inst Catala d’Oncologia, Badalona, Spain; Hosp Arnau de Vilanova de Valencia, Valencia, Spain; Hosp Provincial de Castellon, Castellon, Spain; Hosp Clinico Univ Lozano Blesa, Zaragoza, Spain
| | - R. de las Penas
- Inst Catala d’Oncologia, Badalona, Spain; Hosp Arnau de Vilanova de Valencia, Valencia, Spain; Hosp Provincial de Castellon, Castellon, Spain; Hosp Clinico Univ Lozano Blesa, Zaragoza, Spain
| | - J. M. Sanchez
- Inst Catala d’Oncologia, Badalona, Spain; Hosp Arnau de Vilanova de Valencia, Valencia, Spain; Hosp Provincial de Castellon, Castellon, Spain; Hosp Clinico Univ Lozano Blesa, Zaragoza, Spain
| | - T. Moran
- Inst Catala d’Oncologia, Badalona, Spain; Hosp Arnau de Vilanova de Valencia, Valencia, Spain; Hosp Provincial de Castellon, Castellon, Spain; Hosp Clinico Univ Lozano Blesa, Zaragoza, Spain
| | - D. Isla
- Inst Catala d’Oncologia, Badalona, Spain; Hosp Arnau de Vilanova de Valencia, Valencia, Spain; Hosp Provincial de Castellon, Castellon, Spain; Hosp Clinico Univ Lozano Blesa, Zaragoza, Spain
| | - S. Catot
- Inst Catala d’Oncologia, Badalona, Spain; Hosp Arnau de Vilanova de Valencia, Valencia, Spain; Hosp Provincial de Castellon, Castellon, Spain; Hosp Clinico Univ Lozano Blesa, Zaragoza, Spain
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Font A, Maurel J, Salazar R, Ramirez JL, Botia M, Casado E, Gallego R, Manos L, Tisaire JL, Taron M. Phase I trial of cisplatin (CDDP), docetaxel (TXT) and CPT-11 in patients (p) with advanced esophagogastric cancer: Feasibility and activity related to XPD and UGT1A1 gene polymorphisms. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.4043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- A. Font
- Inst Catala d’Oncologia Hosp Germans Trias, Badalona, Barcelona, Spain; Hosp Clinic i Provincial de Barcelona, Barcelona, Spain; Hosp de la Vall d’Hebron, Barcelona, Spain; Sanofi-Aventis, Barcelona, Spain
| | - J. Maurel
- Inst Catala d’Oncologia Hosp Germans Trias, Badalona, Barcelona, Spain; Hosp Clinic i Provincial de Barcelona, Barcelona, Spain; Hosp de la Vall d’Hebron, Barcelona, Spain; Sanofi-Aventis, Barcelona, Spain
| | - R. Salazar
- Inst Catala d’Oncologia Hosp Germans Trias, Badalona, Barcelona, Spain; Hosp Clinic i Provincial de Barcelona, Barcelona, Spain; Hosp de la Vall d’Hebron, Barcelona, Spain; Sanofi-Aventis, Barcelona, Spain
| | - J. L. Ramirez
- Inst Catala d’Oncologia Hosp Germans Trias, Badalona, Barcelona, Spain; Hosp Clinic i Provincial de Barcelona, Barcelona, Spain; Hosp de la Vall d’Hebron, Barcelona, Spain; Sanofi-Aventis, Barcelona, Spain
| | - M. Botia
- Inst Catala d’Oncologia Hosp Germans Trias, Badalona, Barcelona, Spain; Hosp Clinic i Provincial de Barcelona, Barcelona, Spain; Hosp de la Vall d’Hebron, Barcelona, Spain; Sanofi-Aventis, Barcelona, Spain
| | - E. Casado
- Inst Catala d’Oncologia Hosp Germans Trias, Badalona, Barcelona, Spain; Hosp Clinic i Provincial de Barcelona, Barcelona, Spain; Hosp de la Vall d’Hebron, Barcelona, Spain; Sanofi-Aventis, Barcelona, Spain
| | - R. Gallego
- Inst Catala d’Oncologia Hosp Germans Trias, Badalona, Barcelona, Spain; Hosp Clinic i Provincial de Barcelona, Barcelona, Spain; Hosp de la Vall d’Hebron, Barcelona, Spain; Sanofi-Aventis, Barcelona, Spain
| | - L. Manos
- Inst Catala d’Oncologia Hosp Germans Trias, Badalona, Barcelona, Spain; Hosp Clinic i Provincial de Barcelona, Barcelona, Spain; Hosp de la Vall d’Hebron, Barcelona, Spain; Sanofi-Aventis, Barcelona, Spain
| | - J. L. Tisaire
- Inst Catala d’Oncologia Hosp Germans Trias, Badalona, Barcelona, Spain; Hosp Clinic i Provincial de Barcelona, Barcelona, Spain; Hosp de la Vall d’Hebron, Barcelona, Spain; Sanofi-Aventis, Barcelona, Spain
| | - M. Taron
- Inst Catala d’Oncologia Hosp Germans Trias, Badalona, Barcelona, Spain; Hosp Clinic i Provincial de Barcelona, Barcelona, Spain; Hosp de la Vall d’Hebron, Barcelona, Spain; Sanofi-Aventis, Barcelona, Spain
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Massuti B, Benlloch S, Sanchez-Paya J, Mafe JJ, Baschwitz B, Fernandez C, Ramirez JL, Marti-Ciriquian JL, Galbis J. Detection of promoter hypermethylation of RARβ, RASSF1A, DAPK and P16/ INK4a genes in cell-free DNA from serum (s) and pleural liquid (pl) of patients (p) with pleural effusion. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.9637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- B. Massuti
- Hosp Gen Univ Alicante, Alicante, Spain; Hosp Germans Trias i Putjol, Badalona, Spain; Hosp de La Ribera, Alzira, Spain
| | - S. Benlloch
- Hosp Gen Univ Alicante, Alicante, Spain; Hosp Germans Trias i Putjol, Badalona, Spain; Hosp de La Ribera, Alzira, Spain
| | - J. Sanchez-Paya
- Hosp Gen Univ Alicante, Alicante, Spain; Hosp Germans Trias i Putjol, Badalona, Spain; Hosp de La Ribera, Alzira, Spain
| | - J. J. Mafe
- Hosp Gen Univ Alicante, Alicante, Spain; Hosp Germans Trias i Putjol, Badalona, Spain; Hosp de La Ribera, Alzira, Spain
| | - B. Baschwitz
- Hosp Gen Univ Alicante, Alicante, Spain; Hosp Germans Trias i Putjol, Badalona, Spain; Hosp de La Ribera, Alzira, Spain
| | - C. Fernandez
- Hosp Gen Univ Alicante, Alicante, Spain; Hosp Germans Trias i Putjol, Badalona, Spain; Hosp de La Ribera, Alzira, Spain
| | - J. L. Ramirez
- Hosp Gen Univ Alicante, Alicante, Spain; Hosp Germans Trias i Putjol, Badalona, Spain; Hosp de La Ribera, Alzira, Spain
| | - J. L. Marti-Ciriquian
- Hosp Gen Univ Alicante, Alicante, Spain; Hosp Germans Trias i Putjol, Badalona, Spain; Hosp de La Ribera, Alzira, Spain
| | - J. Galbis
- Hosp Gen Univ Alicante, Alicante, Spain; Hosp Germans Trias i Putjol, Badalona, Spain; Hosp de La Ribera, Alzira, Spain
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9
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Domine M, Isla D, Cobo M, Camps C, Batista N, Almenares J, Barneto I, Ramirez JL, Sanchez JJ, Rosell R. Pharmacogenomic trial of CPT-11-docetaxel in untreated patients (P) with advanced non small cell lung cancer (NSCLC). A phase II study of the Spanish Lung Cancer Group (SLCG). Correlation with the single nucleotide polymorphisms (SNPs) of UGT1A1, XPD2 and XRCC1. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.7201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- M. Domine
- Fundacion Jimenez Diaz. Univ Autonoma de Ma, Madrid, Spain; Hosp Clinico Univ, Zaragoza, Spain; Hosp Carlos Haya, Malaga, Spain; Hosp Gen, Valencia, Spain; Hosp Univ de Canarias, Tenerife, Spain; Hosp Insular de Canarias, Las Palmas, Spain; Hosp Reina Sofia, Cordoba, Anguilla; Hosp Germans Trias i Pujol Badalona, Barcelona, Spain; Univ Autonoma, Madrid, Spain
| | - D. Isla
- Fundacion Jimenez Diaz. Univ Autonoma de Ma, Madrid, Spain; Hosp Clinico Univ, Zaragoza, Spain; Hosp Carlos Haya, Malaga, Spain; Hosp Gen, Valencia, Spain; Hosp Univ de Canarias, Tenerife, Spain; Hosp Insular de Canarias, Las Palmas, Spain; Hosp Reina Sofia, Cordoba, Anguilla; Hosp Germans Trias i Pujol Badalona, Barcelona, Spain; Univ Autonoma, Madrid, Spain
| | - M. Cobo
- Fundacion Jimenez Diaz. Univ Autonoma de Ma, Madrid, Spain; Hosp Clinico Univ, Zaragoza, Spain; Hosp Carlos Haya, Malaga, Spain; Hosp Gen, Valencia, Spain; Hosp Univ de Canarias, Tenerife, Spain; Hosp Insular de Canarias, Las Palmas, Spain; Hosp Reina Sofia, Cordoba, Anguilla; Hosp Germans Trias i Pujol Badalona, Barcelona, Spain; Univ Autonoma, Madrid, Spain
| | - C. Camps
- Fundacion Jimenez Diaz. Univ Autonoma de Ma, Madrid, Spain; Hosp Clinico Univ, Zaragoza, Spain; Hosp Carlos Haya, Malaga, Spain; Hosp Gen, Valencia, Spain; Hosp Univ de Canarias, Tenerife, Spain; Hosp Insular de Canarias, Las Palmas, Spain; Hosp Reina Sofia, Cordoba, Anguilla; Hosp Germans Trias i Pujol Badalona, Barcelona, Spain; Univ Autonoma, Madrid, Spain
| | - N. Batista
- Fundacion Jimenez Diaz. Univ Autonoma de Ma, Madrid, Spain; Hosp Clinico Univ, Zaragoza, Spain; Hosp Carlos Haya, Malaga, Spain; Hosp Gen, Valencia, Spain; Hosp Univ de Canarias, Tenerife, Spain; Hosp Insular de Canarias, Las Palmas, Spain; Hosp Reina Sofia, Cordoba, Anguilla; Hosp Germans Trias i Pujol Badalona, Barcelona, Spain; Univ Autonoma, Madrid, Spain
| | - J. Almenares
- Fundacion Jimenez Diaz. Univ Autonoma de Ma, Madrid, Spain; Hosp Clinico Univ, Zaragoza, Spain; Hosp Carlos Haya, Malaga, Spain; Hosp Gen, Valencia, Spain; Hosp Univ de Canarias, Tenerife, Spain; Hosp Insular de Canarias, Las Palmas, Spain; Hosp Reina Sofia, Cordoba, Anguilla; Hosp Germans Trias i Pujol Badalona, Barcelona, Spain; Univ Autonoma, Madrid, Spain
| | - I. Barneto
- Fundacion Jimenez Diaz. Univ Autonoma de Ma, Madrid, Spain; Hosp Clinico Univ, Zaragoza, Spain; Hosp Carlos Haya, Malaga, Spain; Hosp Gen, Valencia, Spain; Hosp Univ de Canarias, Tenerife, Spain; Hosp Insular de Canarias, Las Palmas, Spain; Hosp Reina Sofia, Cordoba, Anguilla; Hosp Germans Trias i Pujol Badalona, Barcelona, Spain; Univ Autonoma, Madrid, Spain
| | - J. L. Ramirez
- Fundacion Jimenez Diaz. Univ Autonoma de Ma, Madrid, Spain; Hosp Clinico Univ, Zaragoza, Spain; Hosp Carlos Haya, Malaga, Spain; Hosp Gen, Valencia, Spain; Hosp Univ de Canarias, Tenerife, Spain; Hosp Insular de Canarias, Las Palmas, Spain; Hosp Reina Sofia, Cordoba, Anguilla; Hosp Germans Trias i Pujol Badalona, Barcelona, Spain; Univ Autonoma, Madrid, Spain
| | - J. J. Sanchez
- Fundacion Jimenez Diaz. Univ Autonoma de Ma, Madrid, Spain; Hosp Clinico Univ, Zaragoza, Spain; Hosp Carlos Haya, Malaga, Spain; Hosp Gen, Valencia, Spain; Hosp Univ de Canarias, Tenerife, Spain; Hosp Insular de Canarias, Las Palmas, Spain; Hosp Reina Sofia, Cordoba, Anguilla; Hosp Germans Trias i Pujol Badalona, Barcelona, Spain; Univ Autonoma, Madrid, Spain
| | - R. Rosell
- Fundacion Jimenez Diaz. Univ Autonoma de Ma, Madrid, Spain; Hosp Clinico Univ, Zaragoza, Spain; Hosp Carlos Haya, Malaga, Spain; Hosp Gen, Valencia, Spain; Hosp Univ de Canarias, Tenerife, Spain; Hosp Insular de Canarias, Las Palmas, Spain; Hosp Reina Sofia, Cordoba, Anguilla; Hosp Germans Trias i Pujol Badalona, Barcelona, Spain; Univ Autonoma, Madrid, Spain
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Alberola V, Ramirez JL, De Aguirre I, Rosell R, de las Penas R, Camps C, Cobo M, Taron M, Sanchez-Ronco M, Marti JL. Methylene-tetrahydrofolate reductase (MTHFR) single nucleotide polymorphism (SNP) in gemcitabine (gem)/cisplatin (cis)-treated non-small-cell lung cancer (NSCLC) patients (p). J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.7163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- V. Alberola
- Hospital Arnau de Vilanova de Valencia, Valencia, Spain; Hospital Germans Trias i Pujol, Badalona, Spain; Hospital Provincial de Castellon, Castellon, Spain; Hospital General de Valencia, Valencia, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Autonomous University of Madrid, Madrid, Spain; Hospital General de Alicante, Alicante, Spain
| | - J. L. Ramirez
- Hospital Arnau de Vilanova de Valencia, Valencia, Spain; Hospital Germans Trias i Pujol, Badalona, Spain; Hospital Provincial de Castellon, Castellon, Spain; Hospital General de Valencia, Valencia, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Autonomous University of Madrid, Madrid, Spain; Hospital General de Alicante, Alicante, Spain
| | - I. De Aguirre
- Hospital Arnau de Vilanova de Valencia, Valencia, Spain; Hospital Germans Trias i Pujol, Badalona, Spain; Hospital Provincial de Castellon, Castellon, Spain; Hospital General de Valencia, Valencia, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Autonomous University of Madrid, Madrid, Spain; Hospital General de Alicante, Alicante, Spain
| | - R. Rosell
- Hospital Arnau de Vilanova de Valencia, Valencia, Spain; Hospital Germans Trias i Pujol, Badalona, Spain; Hospital Provincial de Castellon, Castellon, Spain; Hospital General de Valencia, Valencia, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Autonomous University of Madrid, Madrid, Spain; Hospital General de Alicante, Alicante, Spain
| | - R. de las Penas
- Hospital Arnau de Vilanova de Valencia, Valencia, Spain; Hospital Germans Trias i Pujol, Badalona, Spain; Hospital Provincial de Castellon, Castellon, Spain; Hospital General de Valencia, Valencia, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Autonomous University of Madrid, Madrid, Spain; Hospital General de Alicante, Alicante, Spain
| | - C. Camps
- Hospital Arnau de Vilanova de Valencia, Valencia, Spain; Hospital Germans Trias i Pujol, Badalona, Spain; Hospital Provincial de Castellon, Castellon, Spain; Hospital General de Valencia, Valencia, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Autonomous University of Madrid, Madrid, Spain; Hospital General de Alicante, Alicante, Spain
| | - M. Cobo
- Hospital Arnau de Vilanova de Valencia, Valencia, Spain; Hospital Germans Trias i Pujol, Badalona, Spain; Hospital Provincial de Castellon, Castellon, Spain; Hospital General de Valencia, Valencia, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Autonomous University of Madrid, Madrid, Spain; Hospital General de Alicante, Alicante, Spain
| | - M. Taron
- Hospital Arnau de Vilanova de Valencia, Valencia, Spain; Hospital Germans Trias i Pujol, Badalona, Spain; Hospital Provincial de Castellon, Castellon, Spain; Hospital General de Valencia, Valencia, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Autonomous University of Madrid, Madrid, Spain; Hospital General de Alicante, Alicante, Spain
| | - M. Sanchez-Ronco
- Hospital Arnau de Vilanova de Valencia, Valencia, Spain; Hospital Germans Trias i Pujol, Badalona, Spain; Hospital Provincial de Castellon, Castellon, Spain; Hospital General de Valencia, Valencia, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Autonomous University of Madrid, Madrid, Spain; Hospital General de Alicante, Alicante, Spain
| | - J. L. Marti
- Hospital Arnau de Vilanova de Valencia, Valencia, Spain; Hospital Germans Trias i Pujol, Badalona, Spain; Hospital Provincial de Castellon, Castellon, Spain; Hospital General de Valencia, Valencia, Spain; Hospital Universitario Carlos Haya, Malaga, Spain; Autonomous University of Madrid, Madrid, Spain; Hospital General de Alicante, Alicante, Spain
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11
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Cánovas M, Bernal V, Torroglosa T, Ramirez JL, Iborra JL. Link between primary and secondary metabolism in the biotransformation of trimethylammonium compounds by escherichia coli. Biotechnol Bioeng 2004; 84:686-99. [PMID: 14595781 DOI: 10.1002/bit.10822] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [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: 11/11/2022]
Abstract
The aim of this work was to understand the steps controlling the process of biotransformation of trimethylamonium compounds into L(-)-carnitine by Escherichia coli and the link between the central carbon or primary and the secondary metabolism expressed. Thus, the enzyme activities involved in the biotransformation process of crotonobetaine into L(-)-carnitine (crotonobetaine hydration reaction and crotonobetaine reduction reaction), in the synthesis of acetyl-CoA (pyruvate dehydrogenase, acetyl-CoA synthetase, and ATP:acetate phosphotransferase) and in the distribution of metabolites for the tricarboxylic acid (isocitrate dehydrogenase) and glyoxylate (isocitrate lyase) cycles, were followed in batch with both growing and resting cells and during continuous cell growth in stirred-tank and high-cell-density membrane reactors. In addition, the levels of carnitine, crotonobetaine, gamma-butyrobetaine, ATP, NADH/NAD(+), and acetyl-CoA/CoA ratios were measured to determine how metabolic fluxes were distributed in the catabolic system. The results provide the first experimental evidence demonstrating the important role of the glyoxylate shunt during biotransformation of resting cells and the need for high levels of ATP to maintain metabolite transport and biotransformation (2.1 to 16.0 mmol L cellular/mmol ATP L reactor h). Moreover, the results obtained for the pool of acetyl-CoA/CoA indicate that it also correlated with the biotransformation process. The main metabolic pathway operating during cell growth in the high cell-density membrane reactor was that related to isocitrate dehydrogenase (during start-up) and isocitrate lyase (during steady-state operation), together with phosphotransacetylase and acetyl-CoA synthetase. More importantly, the link between central carbon and L(-)-carnitine metabolism at the level of the ATP pool was also confirmed.
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Affiliation(s)
- M Cánovas
- Departamento de Bioquímica y Biología Molecular B e Inmunología, Facultad de Química, Universidad de Murcia, Apdo. Correos 4021, 30100 Murcia, Spain
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12
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Ramirez JL, Taron M, Balaña C, Sarries C, Mendez P, de Aguirre I, Nuñez L, Roig B, Queralt C, Botia M, Rosell R. Serum DNA as a tool for cancer patient management. Rocz Akad Med Bialymst 2003; 48:34-41. [PMID: 14737938] [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: 04/28/2023]
Abstract
PURPOSE Genetic analysis has shown that cell-free circulating DNA in plasma or serum of cancer patients shares similar genetic alterations to those described in the corresponding tumor. One of the most important alterations involved in carcinogenesis is aberrant promoter methylation. The interest in this field has grown due to the implementation of the methylation-specific PCR (MSP) assay. The main objective of this study is to analyze the methylation status of different genes in tumor and serum DNA obtained at the time of surgery in two different tumor models (glioblastoma [GBM] and non-small-cell lung cancer [NSCLC]) and their relationship to clinico-pathological characteristics and response to chemotherapy. MATERIAL AND METHODS Using MSP assay, we assessed the methylation status of MGMT, RASSF1A, p16, DAPK, TMS-1 in tumor and serum DNA obtained at time of surgery or stereotactic biopsy from 28 GBM patients and from 51 NSCLC patients. RESULTS In GBM patients, the prevalence of MGMT, p16, DAPK, and RASSF1A promoter methylation was 38.1%, 66.7%, 52.4%, 57.1%, respectively, in glioma tissue, and 39.3%, 53.6%, 34.3%, 50%, respectively, in serum. A high correlation between methylation in tumor and serum (Spearman test p = 0.0001) was observed. In NSCLC patients, RASSF1A, DAPK and TMS-1 were methylated in 34%, 45% and 35% tumors, respectively, and in 34%, 40% and 34% serum, respectively. A good correlation was found between alterations found in tumor and serum (Spearman test p = 0.0001). CONCLUSIONS The study of serum or plasma DNA has opened new roads for translational research and new strategies for molecular diagnosis. Due to the similarities of alterations found in serum DNA and primary tumor, we can use this tool to calculate the risk of local or distant recurrence and its relationship with survival and its value in patient follow-up to evaluate response to therapy.
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Affiliation(s)
- J L Ramirez
- Medical Oncology Service, Institut Català d'Oncologia, Hospital Germans Trias i Pujol, Ctra Canyet, s/n, 08916 Badalona, Barcelona, Spain
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13
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Whitley NC, Thomas M, Ramirez JL, Moore AB, Cox NM. Influences of parity and level of feed intake on reproductive response to insulin administration after weaning in sows. J Anim Sci 2002; 80:1038-43. [PMID: 12002310 DOI: 10.2527/2002.8041038x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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: 11/13/2022] Open
Abstract
In three experiments, the influence of insulin administered after weaning was examined in primiparous sows given extra feed or in primiparous compared to multiparous sows. In Exp. 1, 171 primiparous and 231 multiparous crossbred sows on a commercial farm were injected with 0.4 IU/kg BW insulin (Eli Lilly Lente Iletin II) or saline for 4 d beginning the day after weaning (d 0) and were fed 2.3 kg/d until mating. In Exp. 2, 153 primiparous sows from the same farm as those in Exp. 1 were injected with insulin or saline as in Exp. 1 and were fed 2.7 or 3.6 kg/d until mating. In Exp. 3, 63 primiparous crossbred sows were injected with insulin or saline as described above and fed either 2.3 or 4.5 kg/d for 5 d after weaning and were remated. On the commercial farm (Exp. 1 and 2), insulin administration increased percentage in estrus for primiparous sows compared to multiparous sows (treatment x parity interaction, P < 0.02) but tended to lower litter size in primiparous sows (treatment x parity interaction, P < 0.06). In Exp. 2, insulin combined with extra feed increased (P < 0.05) litter size by two pigs but tended (P < 0.07) to decrease farrowing rate in that group (treatment x feed interaction). Weaning-to-estrus interval, pregnancy rate, ovulation rate, and embryo survival were not influenced by treatment or feeding level (Exp. 3); however, postweaning intake and embryo survival were negatively related for saline-treated sows only (r = -0.55; P < 0.01), and backfat depth at weaning and embryo survival were positively related for insulin-treated sows only (r = 0.44; P < 0.05). Overall, insulin administration differentially influenced reproduction in primiparous sows and may have interacted with metabolic or nutritional state of the animal.
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Affiliation(s)
- N C Whitley
- Department of Animal and Dairy Sciences, Mississippi State University, Mississippi State 39762, USA
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Premoli-de-Percoco G, Gonzalez N, Añez N, Guevara P, Ramirez JL. PCR detection of specific Leishmania-DNA in patients with periodontal disease. Pathologica 2002; 94:28-31. [PMID: 11912876] [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: 02/24/2023] Open
Abstract
This study deals with the detection of Leishmania braziliensis DNA in gingival specimens from 10 individuals who all had suffered from cutaneous leishmaniasis 5-10 years prior to the examination and all had been treated with anti-leishmaniasis drugs. This preliminary study gives an interesting contribution to the oral microbiology of this disease, with the observation that inflamed periodontal tissues can serve as a factor affecting the dispersion of Leishmania parasites in individuals who had suffered from cutaneous leishmaniasis. These finding are corroborated by the results of polymerase chain reaction (PCR) which demonstrated the presence of Leishmania DNA in tissue samples of patients with periodontal diseases.
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Affiliation(s)
- G Premoli-de-Percoco
- Center for Odontological Research, Faculty of Dentistry, University of the Andes, calle 23 entre Av. 2 y 3, Edificio el Rectorado, Mérida 5101, Venezuela.
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Añez N, Crisante G, Rojas A, Carrasco H, Parada H, Yepez Y, Borges R, Guevara P, Ramirez JL. Detection and significance of inapparent infection in Chagas disease in western Venezuela. Am J Trop Med Hyg 2001; 65:227-32. [PMID: 11561709 DOI: 10.4269/ajtmh.2001.65.227] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [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: 11/07/2022] Open
Abstract
Inapparent infections of Trypanosoma cruzi were detected in symptomless seropositive people living in close proximity, and under the same conditions of risk, to patients with acute Chagas disease. Similar infections were also detected in sera samples of people from 25 villages of western Venezuela where Chagas disease is endemic. Seropositivity in all the 1,251 studied samples was established by use of 3 serological methods (direct agglutination test, indirect immunofluorescence antibody test, and enzyme-linked immunosorbent assay). Each seropositive sample was tested for detection of anti-T. cruzi-specific immunoglobulin (Ig) M and IgG levels and specific T. cruzi infection by molecular methodology (polymerase chain reaction assay). The combined analysis of the serologic (IgM and IgG levels), molecular (specific T. cruzi DNA), and statistical findings demonstrated the existence of a different stage of T. cruzi infection in asymptomatic patients, which is suggested to be recognized as inapparent infection. Its definition, significance, and comparison with typical Chagas disease phases are presented, and its potential epidemiological importance is discussed.
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Affiliation(s)
- N Añez
- Facultad de Ciencias, Instituto de Cardiología, Universidad de Los Andes, Mérida, Venezuela.
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Premoli-De-Percoco G, Ramirez JL. High risk human papillomavirus in oral squamous carcinoma: evidence of risk factors in a Venezuelan rural population. Preliminary report. J Oral Pathol Med 2001; 30:355-61. [PMID: 11459321 DOI: 10.1034/j.1600-0714.2001.300605.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [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: 11/23/2022]
Abstract
In a search for the presence of human papillomavirus (HPV) and some etiologic cofactors in oral squamous cell carcinoma (OSCC), 50 women diagnosed as OSCC were analyzed by a multiplex polymerase chain reaction (PCR) assay specific for HPV types 6, 11, 16, and 18. This study revealed that 60% (30/50) of the OSCC patients were positive for HPV-DNA sequences. This group was analyzed according to smoking, alcohol consumption, number of pregnancies, poor oral health and low social economic status. The current results indicate an increased incidence of HPV malignant types in the oral cavity in women with OSCC. Also, they support a multifactorial model of oral cancer causation.
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Affiliation(s)
- G Premoli-De-Percoco
- Centro de Investigaciones Odontológicas, Facultad de Odontologia, Universidad de los Andes, Mérida, Venezuela.
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Agudelo B, Muneton CM, Vasquez G, Ramirez JL. Correlation between serum levels of 17 beta-estradiol, progesterone and beta-human chorionic gonadotropin and the karyotype of first trimester anembryonic and embryonic pregnancies. Early Pregnancy (Cherry Hill) 2001; 5:176-90. [PMID: 11753531] [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: 02/23/2023]
Abstract
We aimed at establishing the correlation between karyotype of anembryonic and embryonic first trimester pregnancies and serum levels of beta-hCG, 17beta-estradiol and progesterone. Chromosomal analyses were performed on products of conceptions lower than 12 weeks, using standard-banding protocols. Measurements of 17beta-estradiol and progesterone were carried out by immunoenzymatic assays and beta-hCG by radioimmunoanalysis (RIA). Chromosomal analyses among 11 spontaneous abortions revealed 6 (54,5%) to be normal and 5 (45,5%) abnormal; of these latter, 4 were anembryonic pregnancies (44,4% total frequency). Serum beta hCG and beta-estradiol average levels were lower in the anembryonic pregnancies but did not reveal significant differences with normal levels. Hormonal levels were correlated with karyotype results and it was found that average beta-hCG value was 3.8 times higher in cases with abnormal karyotype than in those in whom it was normal (p <0.05). Linear correlation analyses between hormonal measurements in anembryonic pregnancies were statistically significant (p <0.05). Correlations between beta-hCG and progesterone, beta-hCG and 17-beta estradiol, and the latter with progesterone, proved to be significant in the group with abnormal karyotype (p < 0.05). Anembryonic pregnancies present high frequency of chromosomal anomalies; such pregnancies with abnormal karyotype have a high serum level of beta-hCG; this condition increased the rate of abortion.
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Affiliation(s)
- B Agudelo
- Departament of Obstetrics and Gynecology, University of Antioquia, Medellin, Colombia
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Low MJ, Otero-Corchon V, Parlow AF, Ramirez JL, Kumar U, Patel YC, Rubinstein M. Somatostatin is required for masculinization of growth hormone-regulated hepatic gene expression but not of somatic growth. J Clin Invest 2001; 107:1571-80. [PMID: 11413165 PMCID: PMC200191 DOI: 10.1172/jci11941] [Citation(s) in RCA: 133] [Impact Index Per Article: 5.8] [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: 11/17/2022] Open
Abstract
Pulsatile growth hormone (GH) secretion differs between males and females and regulates the sex-specific expression of cytochrome P450s in liver. Sex steroids influence the secretory dynamics of GH, but the neuroendocrine mechanisms have not been conclusively established. Because periventricular hypothalamic somatostatin (SST) expression is greater in males than in females, we generated knockout (Smst(-/-)) mice to investigate whether SST peptides are necessary for sexually differentiated GH secretion and action. Despite marked increases in nadir and median plasma GH levels in both sexes of Smst(-/-) compared with Smst(+/+) mice, the mutant mice had growth curves identical to their sibling controls and retained a normal sexual dimorphism in weight and length. In contrast, the liver of male Smst(-/-) mice was feminized, resulting in an identical profile of GH-regulated hepatic mRNAs between male and female mutants. Male Smst(-/-) mice show higher expression of two SST receptors in the hypothalamus and pituitary than do females. These data indicate that SST is required to masculinize the ultradian GH rhythm by suppressing interpulse GH levels. In the absence of SST, male and female mice exhibit similarly altered plasma GH profiles that eliminate sexually dimorphic liver function but do not affect dimorphic growth.
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Affiliation(s)
- M J Low
- Vollum Institute, Oregon Health & Science University, Portland, Oregon 97201, USA.
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Guevara P, Pinto-Santíni D, Rojas A, Crisante G, Añez N, Ramirez JL. Green fluorescent protein-tagged Leishmania in phlebotomine sand flies. J Med Entomol 2001; 38:39-43. [PMID: 11268689 DOI: 10.1603/0022-2585-38.1.39] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In this work we have used for the first time green fluorescent protein (GFP) tagged cells of the human parasite Leishmania donovani to observe its development in the gut of phlebotomine sand flies. Low numbers of GFP-tagged L. donovani were more easily detected than nontagged Leishmania, suggesting that GFP-tagged Leishmania could be used to efficiently study the biology of Leishmania in their vectors, and open the possibility of using nonaxenic flies. Using this method, we found that GFP-tagged L. donovani, the ethiological agent of Old World Kala-azar, were able to establish an infection within the gut of Lutzomyia species, which are vectors of New World Leishmania. The GFP-tagged parasites divide successfully in the gut of colonized and in wild caught Lu. longipalpis (Lutz & Neiva, 1912), Lu. ovallesis (Ortiz, 1952), and Lu. youngi (Feliciangeli & Murillo, 1985). In the case of Lulongipalpis the labeled parasite exhibited a normal anterior development as the one observed in its natural vector.
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Affiliation(s)
- P Guevara
- Instituto de Biología Experimental, Facultad de Ciencias, Universidad Central de Venezuela, Caracas 1041-A, Venezuela
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20
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Carmo MS, Araya JE, Ramirez MI, Boscardin S, Cano MI, Baida RP, Ruiz RC, Santos MR, Chiurillo MA, Ramirez JL, Yoshida N, Silveira JF. Organization and expression of a multigene family encoding the surface glycoproteins of Trypanosoma cruzi metacyclic trypomastigotes involved in the cell invasion. Mem Inst Oswaldo Cruz 2000; 94 Suppl 1:169-71. [PMID: 10677708 DOI: 10.1590/s0074-02761999000700022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- M S Carmo
- Departamento de Micro, Imuno e Parasitologia, Escola Paulista de Medicina, Unifesp, São Paulo, Brasil
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21
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Abstract
We describe here the cloning and sequence characterization of the absolute termini of several telomeres from the human parasite Leishmania donovani using a vector-adapter protocol. The 3' protruding strand of L. donovani telomeres terminates with the sequence 5'-GGTTAGGGT-OH 3'. This single-stranded sequence is adjacent to tandemly repeated blocks of double-stranded sequence consisting of variable numbers of the hexameric repeat 5'-TAGGGT-3', variable numbers of an octameric repeat 5'-TGGTCATG-3', and a single 62-bp sequence, in that order. A number of additional, more chromosome-internal, nonrepeated sequences were found adjacent to the telomere sequences. Hybridization analyses indicated that some of these telomere adjacent sequences are found on all L. donovani chromosomes, some are more abundant on certain subsets of chromosomes, and some are unique to individual chromosomes.
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Affiliation(s)
- M A Chiurillo
- Instituto de Biología Experimental, Universidad Central de Venezuela, Caracas
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22
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Santos MR, Lorenzi H, Porcile P, Carmo MS, Schijman A, Brandão A, Araya JE, Gomes HB, Chiurillo MA, Ramirez JL, Degrave WM, Levin MJ, da Silveira JF. Physical mapping of a 670-kb region of chromosomes XVI and XVII from the human protozoan parasite Trypanosoma cruzi encompassing the genes for two immunodominant antigens. Genome Res 1999; 9:1268-76. [PMID: 10613849 PMCID: PMC311010 DOI: 10.1101/gr.9.12.1268] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [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: 11/24/2022]
Abstract
As part of the Trypanosoma cruzi Genome Initiative, we have mapped a large portion of the chromosomal bands XVI (2.3 Mb) and XVII (2.6 Mb) containing the highly repetitive and immunodominant antigenic gene families h49 and jl8. Restriction mapping of the isolated chromosomal bands and hybridization with chromosome specific gene probes showed that genes h49 and jl8 are located in a pair of size-polymorphic homologous chromosomes. To construct the integrated map of the chromosomes harboring the h49 and jl8 loci, we used YAC, cosmid, and lambda phage overlapping clones, and long range restriction analysis using a variety of probes (i.e., known gene sequences, ESTs, polymorphic repetitive sequences, anonymous sequences, STSs generated from the YAC ends). The total length covered by the YAC contig was approximately 670 kb, and its map agreed and was complementary to the one obtained by long-range restriction fragment analysis. Average genetic marker spacing in a 105 kb region around h49 and jl8 genes was estimated to be 6.2 kb/marker. We have detected some polymorphism in the H49/JL8 antigens-encoding chromosomes, affecting also the coding regions. The physical map of this region, together with the isolation of specific chromosome markers, will contribute in the global effort to sequence the nuclear genome of this parasite.
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Affiliation(s)
- M R Santos
- Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina, UNIFESP, Rua Botucatu 862, CEP 04023-062, S. Paulo, Brasil
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Chiurillo MA, Cano I, Da Silveira JF, Ramirez JL. Organization of telomeric and sub-telomeric regions of chromosomes from the protozoan parasite Trypanosoma cruzi. Mol Biochem Parasitol 1999; 100:173-83. [PMID: 10391379 DOI: 10.1016/s0166-6851(99)00047-x] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We present here a characterization of the telomeric and subtelomeric regions of Trypanosoma cruzi chromosomes, using three types of recombinants: cosmids from a genomic library, clones obtained by a vector-adaptor protocol, and a recombinant fragment cloned by a Bal31 trimming protocol. The last nine nucleotides of the T. cruzi overhang are 5'-GGGTTAGGG-3', and there are from 9 to 50 copies of the hexameric repeat 5'-TTAGGG-3', followed by a 189-bp junction sequence common to all recombinants. The subtelomeric region is made of sequences associated with the gp85/sialidase gene family, and/or sequences derived from SIRE, a retrotransposon-like sequence, and also the retrotransposon L1Tc. We discuss the possible implications of this genome organization.
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Affiliation(s)
- M A Chiurillo
- Instituto de Biologia Experimental, Universidad Central de Venezuela, Caracas
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Añez N, Carrasco H, Parada H, Crisante G, Rojas A, Fuenmayor C, Gonzalez N, Percoco G, Borges R, Guevara P, Ramirez JL. Myocardial parasite persistence in chronic chagasic patients. Am J Trop Med Hyg 1999; 60:726-32. [PMID: 10344642 DOI: 10.4269/ajtmh.1999.60.726] [Citation(s) in RCA: 98] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The persistence of Trypanosoma cruzi tissue forms was detected in the myocardium of seropositive individuals clinically diagnosed as chronic chagasic patients following endomyocardial biopsies (EMBs) processed by immunohistochemical (peroxidase-anti-peroxidase [PAP] staining) and molecular (polymerase chain reaction [PCR]) techniques. An indirect immunofluorescent technique revealed antigenic deposits in the cardiac tissue in 24 (88.9%) of 27 patients. Persistent T. cruzi amastigotes were detected by PAP staining in the myocardium of 22 (84.6%) of 26 patients. This finding was confirmed with a PCR assay specific for T. cruzi in 21 (91.3%) of 23 biopsy specimens from the same patients. Statistical analysis revealed substantial agreement between PCR and PAP techniques (k = 0.68) and the PCR and any serologic test (k = 0.77). The histopathologic study of EMB specimens from these patients revealed necrosis, inflammatory infiltrates, and fibrosis, and made it possible to detect heart abnormalities not detected by electrocardiogram and/or cineventriculogram. These indications of myocarditis were supported by the detection of T. cruzi amastigotes by the PAP technique or its genome by PCR. They suggest that although the number of parasites is low in patients with chronic Chagas' disease, their potential for heart damage may be comparable with those present during the acute phase. The urgent necessity for testing new drugs with long-term effects on T. cruzi is discussed in the context of the present results.
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Affiliation(s)
- N Añez
- Facultad de Ciencias, Instituto de Cardiologia, Universidad de Los Andes, Mérida, Venezuela
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Añez N, Carrasco H, Parada H, Crisante G, Rojas A, Gonzalez N, Ramirez JL, Guevara P, Rivero C, Borges R, Scorza JV. Acute Chagas' disease in western Venezuela: a clinical, seroparasitologic, and epidemiologic study. Am J Trop Med Hyg 1999; 60:215-22. [PMID: 10072139 DOI: 10.4269/ajtmh.1999.60.215] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [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: 11/07/2022] Open
Abstract
A clinical, parasitologic, and serologic study carried out between 1988 and 1996 on 59 acute-phase patients in areas of western Venezuela where Chagas' disease is endemic showed 19 symptomatic patterns or groups of symptoms appearing in combination with different frequencies. The symptomatic pattern with the highest frequency was that showing simultaneously fever, myalgia, headache, and Romaña's sign, which was detected in 20% of the acute-phase patients. Asymptomatic individuals and patients with fever as the only sign of the disease made up 15% and 11.9% of the total acute cases, respectively. Statistical correlation analysis revealed that xenodiagnosis and hemoculture were the most reliable and concordant of the five parasitologic methods used; these two methods also showed the highest proportions in detecting any clinical symptomatic pattern in acute-phase patients. A similar high reliability and concordance was obtained with a direct agglutination test, an indirect immunofluorescent antibody test, and an ELISA as serologic tests, which also showed a higher proportion of positive detection of clinical patterns than parasitologic methods (P < 0.001). It is recommended that individuals coming from endemic areas showing mild and/or severe clinical manifestations should be suspected of being in contact or having been in contact with Trypanosoma cruzi, be referred for parasitologic and serologic evaluations to confirm the presumptive clinical diagnosis of acute Chagas' disease, and start specific treatment. The epidemiologic implications of the present findings are discussed and the use of similar methodology to evaluate other areas where Chagas' disease is endemic is suggested.
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Affiliation(s)
- N Añez
- Facultad de Ciencias, Instituto de Cardiologia, Universidad de Los Andes, Merida, Venezuela
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Urdaneta L, Guevara P, Ramirez JL. Evaluation of DNA recombinant methodologies for the diagnosis of Plasmodium falciparum and their comparison with the microscopy assay. Mem Inst Oswaldo Cruz 1998; 93:639-46. [PMID: 9830531 DOI: 10.1590/s0074-02761998000500014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 11/21/2022] Open
Abstract
Since 1984, DNA tests based on the highly repeated subtelomeric sequences of Plasmodium falciparum (rep 20) have been frequently used in malaria diagnosis. Rep 20 is very specific for this parasite, and is made of 21 bp units, organized in repeated blocks with direct and inverted orientation. Based in this particular organization, we selected a unique consensus oligonucleotide (pf-21) to drive a PCR reaction coupled to hybridization to non-radioactive labeled probes. The pf-21 unique oligo PCR (pf-21-I) assay produced DNA amplification fingerprints when was applied on purified P. falciparum DNA samples (Brazil and Colombia), as well as in patient's blood samples from a large area of Venezuela. The performance of the Pf-21-I assay was compared against Giemsa stained thick blood smears from samples collected at a malaria endemic area of the Bolivar State, Venezuela, at the field station of Malariología in Tumeremo. Coupled to non-radioactive hybridization the pf-21-I performed better than the traditional microscopic method with a r = 1.7:1. In the case of mixed infections the r value of P. falciparum detection increased to 2.5:1. The increased diagnostic sensitivity of the test produced with this homologous oligonucleotide could provide an alternative to the epidemiological diagnosis of P. falciparum being currently used in Venezuela endemic areas, where low parasitemia levels and asymptomatic malaria are frequent. In addition, the DNA fingerprint could be tested in molecular population studies.
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Affiliation(s)
- L Urdaneta
- Escuela de Malariología y Saneamiento Ambiental Dr. Arnoldo Gabaldón, Maracay, Venezuela
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27
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Awad RA, Martin J, Cal y Major M, Noguera JL, Ramos R, Amezcua C, Camacho S, Santiago R, Ramirez JL, Castro J. Transrectal ultrasonography: relationship with anorectal manometry, electromyography and sensitivity tests in irritable bowel syndrome. Int J Colorectal Dis 1998; 13:82-7. [PMID: 9638493 DOI: 10.1007/s003840050140] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [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] [Indexed: 02/07/2023]
Abstract
Irritable bowel syndrome is the most frequently diagnosed disorder in gastroenterology. It has been demonstrated with specialized motility studies that these patients compared to healthy subjects show changes in rectoanal electrical and mechanical activity and in rectoanal sensitivity. However, until now no report has been published on morphological alterations in the rectum or the internal anal sphincter. Twenty-five consecutive patients with irritable bowel syndrome (mean age 32, range 17-47 years; 24 females) were evaluated prospectively by transrectal ultrasonography, rectal sensitivity studies, and recordings of both electrical and mechanical activity of the distal rectum and internal anal sphincter during a 2-h inter-digestive period. Ten healthy volunteers (mean age 34.5, range 19-50 years) served as a control group. Paired and non-paired Student's two-tailed t test and linear regression analysis were used. It was shown that muscle thickness of the rectum during rest (4.7 +/- 0.1 mm) was correlated neither with its rectal spike amplitude (0.73 +/- 0.1 mV) nor with rectal spike frequency (17.06 +/- 3.6 spike/2 h). In addition, the diameter of the internal anal sphincter (1.2 +/- 0.1 mm) was correlated neither with its resting pressure, nor with frequency (17.1 +/- 3.2/2 h), duration (14.9 +/- 1.5 s), or amplitude (14.1 +/- 1.9 mmHg), of inhibition of the spontaneous rectoanal inhibitory reflex. No correlation was found between ultrasonographic parameters and rectal distension variables (r = 0.03). This study demonstrates for the first time morphological anorectal changes in patients with irritable bowel syndrome compared to healthy subjects, in addition to showing that morphological changes are independent of physiological ones. Therefore both transrectal ultrasonography to determine anorectal morphology and electromanometry to assess anorectal function are important measures in the evaluation of patients with irritable bowel syndrome.
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Affiliation(s)
- R A Awad
- Experimental Medicine and Motility Unit U-404-B, Ministry of Health, Mexico City General Hospital, D.F., Mexico
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Araya J, Cano MI, Gomes HB, Novak EM, Requena JM, Alonso C, Levin MJ, Guevara P, Ramirez JL, Da Silveira JF. Characterization of an interspersed repetitive DNA element in the genome of Trypanosoma cruzi. Parasitology 1997; 115 ( Pt 6):563-70. [PMID: 9488867 DOI: 10.1017/s0031182097001674] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [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: 02/06/2023]
Abstract
We report the molecular characterization of a middle repetitive DNA sequence, named C6, isolated from the Trypanosoma cruzi genome. C6 appears to be a composite repeated element since 3 subregions may be defined within it on the basis of sequence similarities with other T. cruzi genomic sequences. Sequences homologous to C6 are interspersed in the genome and can be mapped out on most chromosomal bands of different T. cruzi. strains. The copy number of the C6 element is about 1000 per haploid genome. Given the species specificity and different genomic distribution of C6 homologous sequences among the T. cruzi strains the C6 element could be a useful probe for diagnosis and typing of parasites. C6 is a polymorphic marker with potential as a tool for physical mapping of the T. cruzi genome.
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Affiliation(s)
- J Araya
- Departamento de Microbiologia, Immunologia e Parasitologia, Escola Paulista de Medicina, UNIFESP, Brazil
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Santos MR, Cano MI, Schijman A, Lorenzi H, Vázquez M, Levin MJ, Ramirez JL, Brandão A, Degrave WM, da Silveira JF. The Trypanosoma cruzi genome project: nuclear karyotype and gene mapping of clone CL Brener. Mem Inst Oswaldo Cruz 1997; 92:821-8. [PMID: 9580491 DOI: 10.1590/s0074-02761997000600018] [Citation(s) in RCA: 24] [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] [Indexed: 02/07/2023] Open
Abstract
By using improved pulsed field gel electrophoresis conditions, the molecular karyotype of the reference clone CL Brener selected for Trypanosoma cruzi genome project was established. A total of 20 uniform chromosomal bands ranging in size from 0.45 to 3.5 Megabase pairs (Mbp) were resolved in a single run. The weighted sum of the chromosomal bands was approximately 87 Mbp. Chromoblots were hybridized with 39 different homologous probes, 13 of which identified single chromosomes. Several markers showed linkage and four different linkage groups were identified, each comprising two markers. Densitometric analysis suggests that most of the chromosomal bands contain two or more chromosomes representing either homologous chromosomes and/or heterologous chromosomes with similar sizes.
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Affiliation(s)
- M R Santos
- Universidade Federal de São Paulo (UNIFESP-EPM), Brasil
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Abstract
We conducted two experiments on commercial farms to evaluate the effect of insulin administered to primiparous sows before postweaning estrus on subsequent reproductive performance. On the day after weaning in Exp. 1, 138 crossbred primiparous sows were assigned to receive saline or insulin (.4 IU/kg BW) once daily at the time of feeding for four consecutive days. Treatment did not affect interval from weaning to estrus (5.1 +/- .2 d) or percentage in estrus by 7 d after weaning (92.6%). Farrowing rate at second parity was increased by insulin (76.7 and 92.3% for saline and insulin treatments, respectively; P < .01). Litter sizes at second parity were not affected by insulin treatment. Experiment 2 was conducted on a different commercial farm using 491 primiparous crossbred sows. They were treated similarly to those in Exp. 1 with saline or insulin after weaning, except that treatment duration of 2 d of saline or insulin was included. Treatment did not affect the interval from weaning to estrus (overall, 9.2 +/- .5 d), percentage in estrus by 7 d after weaning (79.1%) or farrowing rate (90.2%). However, the number of total pigs born in the second litter for sows mated within 7 d after weaning was increased (P < .05) by one pig in sows treated with insulin for 4 d (10.3 +/- .3 pigs) compared with 2 d (9.1 +/- .3) and with saline (2 d and 4 d grouped together: 9.3 +/- .1). Third-parity litter size was not adversely affected by treatments applied before the second litter. In conclusion, manipulation with a metabolic hormone such as insulin may improve postweaning fertility by affecting aspects of ovarian follicle development or pregnancy establishment.
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Affiliation(s)
- J L Ramirez
- Mississippi State University, Mississippi State 39762, USA
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Awad RA, Martin J, Guevara M, Ramos R, Noguera JL, Camacho S, Santiago R, Ramirez JL, Toriz A. Defaecography in patients with irritable bowel syndrome and healthy volunteers. Int J Colorectal Dis 1997; 12:91-4. [PMID: 9189778 DOI: 10.1007/s003840050088] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [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] [Indexed: 02/08/2023]
Abstract
BACKGROUND In patients with IBS, many symptoms have their origin in the recto-anal segment, with motility changes in the rectum and in the internal anal sphincter, and alterations in rectal sensitivity. However, up to now, it is not known if these clinical and physiological changes are equated with morphological changes in the recto-anal segment. METHODS Sixteen consecutive patients with IBS (mean age 22, range 18-33 years; 13 females) and 10 healthy volunteers (mean age 34.5, range 19-50 yr.; 6 males) were evaluated prospectively with defaecography. RESULTS 1) Anorectal angle: No significant differences were observed in the anorectal angle during rest (91.6 +/- 3.5 degrees vs 92.6 +/- 2.5 degrees) and during defaecation (92 +/- 5.5 degrees vs 98.7 +/- 2.6 degrees) between patients with IBS and healthy volunteers. However, patients with IBS were unable to widen the angle during defaecation, remaining the same at rest (91.6 +/- 3.5 degrees) as during defaecation (92 +/- 5.5 degrees). IBS patients with constipation (n = 2) compared to those with normal frequency defaecation (n = 13) showed no significant differences at rest (95 +/- 6 vs 89.8 +/- 4.1 degrees) and during defaecation (100 +/- vs 88.9 +/- 6.4 degrees). Healthy volunteers widened the angle by more than 5 degrees during defaecation. 2) Perineometry: although not significant, patients with IBS had less perineal descent during the simulated defaecation (1.98 +/- 0.37 cm) than healthy subjects (2.1 +/- 0.3 cm). Nevertheless, during squeeze there was significantly less mobility or perineal descent in patients with IBS than in control subjects (0.21 +/- 0.17 vs 0.95 +/- 0.21 cm; P = 0.01). CONCLUSIONS The findings of this study suggest that patients with IBS as a whole, whether constipation predominant or not, showed changes in pelvic-floor mobility.
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Affiliation(s)
- R A Awad
- Experimental Medicine and Motility Unit, Ministry of Health, México City General Hospital, México D.F
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Delgado O, Guevara P, Silva S, Belfort E, Ramirez JL. Follow-up of a human accidental infection by Leishmania (Viannia) braziliensis using conventional immunologic techniques and polymerase chain reaction. Am J Trop Med Hyg 1996; 55:267-72. [PMID: 8842113 DOI: 10.4269/ajtmh.1996.55.267] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [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: 02/02/2023] Open
Abstract
The results of a two-year follow-up study of an accidental human infection with Leishmania (Viannia) braziliensis are presented. Western blots, indirect immunofluorescence, and intradermal reaction assays were not able to detect the infection before week 18 postinfection, whereas using the polymerase chain reaction (PCR) on blood samples, parasite DNA was detected at week 8. All test results, except the intradermal reaction followed the cure process and 12 weeks after the last chemotherapy injection (week 36 postinfection), all were negative. However, a year after cure, the PCR became positive again and has remained so for two years. To determine in which blood cell fraction the parasite was evident, enriched lymphocyte and monocyte fractions were assayed by the PCR. These results are discussed in the context of persistent infections.
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Affiliation(s)
- O Delgado
- Instituto de Medicina Tropical Felix Pifano, Universidad Central de Venezuela, Caracas, Venezuela
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33
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Blasini AM, Delgado MB, Valdivieso C, Guevara P, Ramirez JL, Stekman IL, Rodriguez MA, Williams RC. Restriction fragment length polymorphisms of constant region genes of immunoglobulin lambda chains in Venezuelan patients with systemic lupus erythematosus. Lupus 1996; 5:300-2. [PMID: 8869902 DOI: 10.1177/096120339600500410] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 02/02/2023]
Abstract
Previous studies suggest a potential association between human immunoglobulin (Ig) genes and susceptibility to systemic lupus erythematosus (SLE). Ig allotypic determinants seem to confer an increased risk for the disease in various ethnic patient populations. In this study we have examined the pattern of restriction fragment length polymorphisms (RFLP) of constant region lambda (C lambda) light chain genes in a group of 78 Venezuelan patients with SLE and 70 healthy controls. The frequency of the 8-kb allele and the 8/8 genotype was significantly lower in normal Venezuelan controls as compared to healthy British Caucasians (P = 0.0002 and 0.0007 respectively). In turn, Venezuelan controls showed a higher frequency of the 18-kb allele and the 18/18 genotype (P = 0.0002 and 0.0052 respectively). However, there were no statistically significant differences in either parameter between Venezuelan SLE patients and healthy controls. Our study argues against a role for lambda light chain constant region genes in predisposition to SLE.
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Affiliation(s)
- A M Blasini
- Centro Nacional de Enfermedades Reumaticas, Hospital Universitario de Caracas, Venezuela
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Ramirez JL. Anterolateral decompression of the atlantoaxial vertebral artery. J Neurosurg 1996; 85:193. [PMID: 8683278 DOI: 10.3171/jns.1996.85.1.0193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Castaño JP, Torronteras R, Ramirez JL, Gribouval A, Sanchez-Hormigo A, Ruiz-Navarro A, Gracia-Navarro F. Somatostatin increases growth hormone (GH) secretion in a subpopulation of porcine somatotropes: evidence for functional and morphological heterogeneity among porcine GH-producing cells. Endocrinology 1996; 137:129-36. [PMID: 8536603 DOI: 10.1210/endo.137.1.8536603] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [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] [Indexed: 01/31/2023]
Abstract
Previous results demonstrate that porcine somatotropes can be separated by density gradient centrifugation into low density (LD) and high density (HD) subpopulations. In rat, two analog somatotrope subpopulations differ morphologically and functionally. In an attempt to determine whether morphological differences were also present within LD and HD porcine somatotropes, we undertook a quantitative electron microscope study of the subcellular organelles of immunoidentified LD and HD somatotropes. In addition, to test for the existence of functional differences, cultures of separated HD and LD subpopulations were treated for 4 h with or without 10 microM GRF-(1-29) and/or 100 microM somatostatin (SRIF), and porcine GH release and intracellular content were evaluated using a homologous enzyme immunoassay. Morphometric results demonstrate that LD somatotropes are smaller in size (P < 0.05) and contain fewer secretory granules (P < 0.05) and more rough endoplasmic reticulum (P < 0.05) than HD somatotropes. In terms of secretion, LD somatotropes showed a classical response; GRF increased GH release 1.7-fold (n = 6; P < 0.05) over the control value, whereas treatment with SRIF alone did not affect basal GH release in this subpopulation, but partially blocked GRF-induced GH release. HD somatotropes responded to GRF with a similar 1.7-fold increase in GH release. However, SRIF administered alone or in combination with GRF exerted a paradoxical stimulatory effect on HD somatotropes (2.15- and 2.12-fold over control value, respectively; n = 6; P < 0.05). These results demonstrate that the porcine somatotrope population is composed of two major subpopulations that display a distinctive pattern of ultrastructural organization and a markedly divergent secretory response to in vitro SRIF treatment.
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Affiliation(s)
- J P Castaño
- Department of Cell biology, Faculty of Sciences, University of Cordoba, Spain
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Cano MI, Gruber A, Vazquez M, Cortés A, Levin MJ, González A, Degrave W, Rondinelli E, Zingales B, Ramirez JL. Molecular karyotype of clone CL Brener chosen for the Trypanosoma cruzi genome project. Mol Biochem Parasitol 1995; 71:273-8. [PMID: 7477112 DOI: 10.1016/0166-6851(95)00066-a] [Citation(s) in RCA: 127] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- M I Cano
- Escola Paulisa de Medicina, São Paulo, Brazil
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Rangel R, Rocha L, Ramirez JL, Ibarra MJ, Solorza G, Monroy A, Ramirez MA, Herrera A, Weiss-Steider B. Generation of memory CD4+, CD8+, CD45RO+ and CD16- lymphocytes activated with IL-2, INF-gamma, and TNF-alpha with specific cytotoxicity against autologous cervical cancer cells in a mixed leukocyte-tumour cell culture. Eur Cytokine Netw 1995; 6:195-202. [PMID: 8589277] [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: 01/31/2023]
Abstract
Cytotoxic T lymphocytes (CTL) specific against autologous human cervical cancer cells were generated in vitro from peripheral blood leukocytes (PBL) from four patients with non-keratinized epidermoid carcinoma. For this purpose, these patients' PBL were co-cultured for 28 days either with IL-2 or a mixture of IL-2, IFN-gamma and TNF-alpha in the presence of autologous tumour cells (ATC). Our results showed that these CTL were highly cytotoxic for ATC, weakly cytotoxic for heterologous cervical cancer tumour cells, and not cytotoxic for carcinoma cell lines, normal cervix cells nor autologous PBL. Proliferation and cytotoxicity against ATC were greater when the PBL were activated with the three cytokines. These CTL had a CD4:CD8 ratio of 1:1, were CD16- and CD45RO+ and their killing activity was inhibited by antibodies against CD3, CD8 and MHC-class I but not by antibodies against CD4, CD16 or HLA-class II. The possibility of generating specific CTL in long term cultures for cervical cancer therapy is also discussed.
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MESH Headings
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/pharmacology
- Autoimmunity
- CD4 Antigens/analysis
- CD8 Antigens/analysis
- CD8 Antigens/immunology
- Carcinoma, Squamous Cell/immunology
- Carcinoma, Squamous Cell/pathology
- Cervix Uteri/immunology
- Cytotoxicity, Immunologic
- Female
- HLA Antigens/analysis
- HLA Antigens/immunology
- HLA-D Antigens/analysis
- HLA-D Antigens/immunology
- Humans
- Immunologic Memory/drug effects
- Interferon-gamma/pharmacology
- Interleukin-2/pharmacology
- Laryngeal Neoplasms/pathology
- Leukocyte Common Antigens/analysis
- Leukocytes, Mononuclear/immunology
- Lymphocyte Activation/drug effects
- Lymphocyte Culture Test, Mixed
- Lymphocyte Subsets/chemistry
- Lymphocyte Subsets/drug effects
- Muromonab-CD3/pharmacology
- Receptors, IgG/analysis
- Receptors, IgG/immunology
- Recombinant Proteins
- T-Lymphocytes, Cytotoxic/chemistry
- T-Lymphocytes, Cytotoxic/drug effects
- Tumor Cells, Cultured
- Tumor Necrosis Factor-alpha/pharmacology
- Uterine Cervical Neoplasms/immunology
- Uterine Cervical Neoplasms/pathology
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Affiliation(s)
- R Rangel
- Facultad de Estudios Superiores Zaragoza, Universidad Nacional Autonoma de Mexico, Mexico D.F
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Novak EM, de Mello MP, Gomes HB, Galindo I, Guevara P, Ramirez JL, da Silveira JF. Repetitive sequences in the ribosomal intergenic spacer of Trypanosoma cruzi. Mol Biochem Parasitol 1993; 60:273-80. [PMID: 8232418 DOI: 10.1016/0166-6851(93)90138-n] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [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: 01/29/2023]
Abstract
A fragment of Trypanosoma cruzi ribosomal intergenic spacer (IGS) located at 6.7 kb from the 3' end of the 24S rRNA gene was analyzed. This IGS fragment is characterized by the presence of three types of repetitive elements (designated Spacer Repetitive Elements, SRE), short direct repeats (5-6 bp) and chi-like recombinational sequences. SRE elements are composed of relatively short repeats (43-145 bp) which show variabilities consisting of nucleotide changes, insertions and deletions. SRE-1 element (145 bp) has a short oligo(dA) tail at the end of the repeat and can be found flanked by other SRE elements. SRE elements are species-specific, suggesting that probes based on them may be diagnostic for Trypanosoma cruzi.
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Affiliation(s)
- E M Novak
- Disciplina de Parasitologia, Escola Paulista de Medicina, São Paulo, Brazil
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Abstract
A sensitive in situ hybridization test under low stringency conditions (LCS) with a set of digoxigenin-labeled human papillomavirus mixed probes (D-L HPV MP) revealed a positive reaction in 8 of 10 cases of oral verruca vulgaris (OVV). Ages ranged from 5 to 37 years with a mean of 14.5 years. 50% of all cases were located intraorally on the hard palate, followed in frequency by the commissures. These preliminary findings provide evidence of the role of HPV in OVV from a sample of the Venezuelan population. We show that in situ hybridization conducted under LSC is useful in HPV detection (regardless of the type) and the digoxigenin-labeling system is a rapid, relatively easy and specific method. In addition, this technique permits the retrospective evaluation of routinely processed material, thus widening the investigative spectrum for HPV.
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Affiliation(s)
- G Premoli-de-Percoco
- Instituto de Investigaciones Raul Vicentelli, Facultad de Odontologia, Universidad Central de Venezuela, Caracas
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Ponte-Sucre A, Alonso G, Martinez C, Hung A, Rivas L, Ramirez JL. Isolation of two pyruvate kinase activities in the parasitic protozoan Leishmania mexicana amazonensis. Arch Biochem Biophys 1993; 300:466-71. [PMID: 8424681 DOI: 10.1006/abbi.1993.1063] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [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: 01/30/2023]
Abstract
Using phosphocellulose affinity chromatography we were able to separate two pyruvate kinase (EC 2.7.1.40) activities in the parasitic protozoan Leishmania mexicana amazonesis. One activity (PYK1) showed hyperbolic kinetics and was decreased by fructose 2,6-bisphosphate, whereas the second activity (PYK2) showed sigmoidal kinetics for the substrate phosphoenolpyruvate and was activated by fructose 2,6-bisphosphate. Molecular sieve chromatography (Sephacryl S-400) of PYK1 produced a single peak of apparent molecular mass around 200,000, while PYK2 eluted at a position corresponding to M(r) 55,000.
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Affiliation(s)
- A Ponte-Sucre
- Cátedra de Fisiologia, Escuela de Medicina Luis Razetti, Instituto de Medicina Experimental, Caracas, Venezuela
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Abstract
A study of Trypanosomatidae GC distribution and codon usage is presented. The codon usage patterns in coincidence with the phylogenetical data are similar in Crithidia and Leishmania, whereas they are more divergent in Trypanosoma brucei and T. cruzi. The analysis of the GC mutational pressure in these organisms reveals that T. brucei, and to a lesser extent T. cruzi, have evolved towards a more balanced use of all bases, whereas Leishmania and Crithidia retain features of a primeval genetic apparatus. Tables with the approximated GC mutational pressure in homologous genes, and codon usage in Trypanosomatidae are presented.
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Affiliation(s)
- G Alonso
- Centro de Biología Celular, Universidad Central de Venezuela, Caracas
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Abstract
Hypophysial prolactin (PRL) and thyrotropin (TSH) cells of Rana perezi were examined after treatment in vitro with synthetic thyrotropin-releasing hormone (TRH). Ultrastructural morphometry applied to PRL and TSH immunoidentified cells estimated the volume density (Vv) of the secretory granules (SG), rough endoplasmic reticulum (ER), and Golgi complex (GC) as well as the numerical density (Nv) of the granules. Hemipituitaries were cultured in a superfusion system with or without 100 ng TRH/ml for 4, 14, or 24 hr. PRL cells showed significant degranulation (42%) of medium size SG after 14 hr of stimulation, whereas the biosynthetic machinery (ER and GC) was significantly developed after 4 hr of TRH culture (increase of Vv of GC, 1.5-fold, and ER, 1.3-fold, in comparison to the control). Most of these changes remained after 24 hr of TRH treatment. Compared with controls, TRH-treated TSH cells differed only after 24 hr when SG showed degranulation (40%), mainly of the medium size ones, and Vv of GC (1.6-fold) and ER (1.3-fold) increased. These results suggest that TRH acts directly on amphibian PRL and TSH cells stimulating hormonal synthesis and release. The time courses of responses to TRH differed in that PRL cells gave an immediate response while TSH cells gave a more delayed reaction.
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Affiliation(s)
- J P Castaño
- Department of Cell Biology, University of Córdoba, Spain
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Premoli-de-Percoco G, Galindo I, Ramirez JL. In situ hybridization with digoxigenin-labelled DNA probes for the detection of human papillomavirus-induced focal epithelial hyperplasia among Venezuelans. Virchows Arch A Pathol Anat Histopathol 1992; 420:295-300. [PMID: 1314447 DOI: 10.1007/bf01600207] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
An in situ hybridization assay with digoxigenin-labelled probes was used to detect the presence of human papillomavirus (HPV) sequences in ten related Venezuelan patients with the diagnosis of focal epithelial hyperplasia. The samples displayed HPV sequences in all cases. Further restriction analysis in four of the patients suggested the presence of HPV-13 in oral lesions.
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Affiliation(s)
- G Premoli-de-Percoco
- Instituto de Investigaciones Raúl Vincentelli, Facultad de Odontologia, Universidad Central de Venezuela, Caracas
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de Mello MP, Gomes HB, Guevara P, Ramirez JL, da Silveira JF. Trypanosoma cruzi: cloning of the 26 S ribosomal gene and its associated spacer. Mem Inst Oswaldo Cruz 1988; 83 Suppl 1:334-6. [PMID: 3075681 DOI: 10.1590/s0074-02761988000500018] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Affiliation(s)
- M P de Mello
- Departamento de Micro, Imuno e Parasitologia, Escola Paulista de Medicina, SP, Brasil
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Cox NM, Ramirez JL, Matamoros IA, Bennett WA. Estrogen induces estrus unaccompanied by a preovulatory surge in luteinizing hormone in suckled sows. Biol Reprod 1988; 38:592-6. [PMID: 3378071 DOI: 10.1095/biolreprod38.3.592] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [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: 01/05/2023] Open
Abstract
The objective was to determine if progressive changes occurred in incidence of estrus and patterns of luteinizing hormone (LH) after estradiol benzoate (EB) administration at three stages of lactation. Estradiol benzoate (800 micrograms) was injected at the beginning of the second (7.8 +/- 0.3 days, range 7-8, n = 4), third (15.6 +/- 0.3 days, range 15-16 days, n = 5), or fourth (23.3 +/- 0.5 days, range 22-24, n = 4) wk of lactation. Interval to estrus (h) and proportion in estrus (in parentheses) were 72 (1/4), 88.5 (4/5), and 99 (4/4; pooled SEM = 3.5) for the second, third, and fourth weeks, respectively. Only one animal ovulated during lactation (third week). This animal had a progesterone concentration of 17 ng/ml 1 wk after estrus and an LH concentration above 2.0 ng/ml for 72 through 90 h after EB. In other sows, LH remained less than 1.0 ng/ml after EB. Patterns of LH after EB in sows treated during the fourth week of lactation were increased to a maximum of 0.76 ng/ml by 120 h after EB, which was greater than for those treated during the second or third week (maxima of 0.38 and 0.32 ng/ml, respectively; pooled SEM = 0.07; p less than 0.05). Concentrations of LH in sows that exhibited estrus were greater both before and after treatment than in sows that did not exhibit estrus after EB (p less than 0.05). By 2 wk after weaning, 8 sows had ovulated (6 of these exhibited estrus), and there were no effects of stage of lactation on these responses. We concluded that the behavioral responsiveness to EB increased as lactation progressed. The increased LH in sows treated during the fourth week indicated a partial recovery of the positive feedback response to EB. These data suggested that separate mechanisms caused behavioral and gonadotropin responses to EB in lactating sows.
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Affiliation(s)
- N M Cox
- Department of Animal Science, Mississippi State University 39762
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Cox NM, Ramirez JL, Matamoros IA, Bennett WA, Britt JH. Influence of season on estrous and luteinizing hormone responses to estradiol benzoate in ovariectomized sows. Theriogenology 1987; 27:395-405. [PMID: 16726245 DOI: 10.1016/0093-691x(87)90228-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/1986] [Accepted: 12/10/1986] [Indexed: 10/26/2022]
Abstract
The objective of this experiment was to determine whether seasonal differences existed in estrous and LH responses to estradiol benzoate (EB) in ovariectomized sows. Sows were ovariectomized after weaning their first litter, and treatment was begun 120 d after ovariectomy. Sows were given 400 mug EB intramuscularly (i.m.) on July 24, 1982 (summer), October 24, 1984 (fall), January 29, 1985 (winter), and March 27, 1985 (spring). Beginning 24 h after EB, sows were checked for estrus four times daily. Proportion in estrus was affected by season, with all sows exhibiting estrus within 5 d after EB in summer, winter, and spring. Only three of five sows exhibited estrus within 5 d after EB in fall. Interval (h) to estrus was delayed in fall (80 h) compared to other seasons (62.6 h; SEM = 4.5). Concentrations of LH were suppressed within 6 h after EB in all seasons but rebounded to pre-injection levels more slowly in fall and spring than in winter and summer. Frequency of LH peaks (3.2 +/- .4 4 h ) was not affected by season, but amplitude (1.9 vs 0.9 ng/ml) and baseline (2.7 vs 1.6 ng/ml) were greater (P < 0.05) for summer than for the other seasons combined. At 6 h after injection, concentrations of estradiol-17beta (pg/ml) were greater in summer (58.3) than in fall (19.0), winter (32.4), or spring (16.6; SEM = 10.4). We conclude that environmental factors associated with season alter responsiveness of the brain to estradiol, thereby controlling sexual behavior and LH secretion.
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Affiliation(s)
- N M Cox
- Department of Animal Science Mississippi State University Mississippi State, MS 39762-5228 USA
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Ramirez JL. Selecting and training successful supervisors. Exec Housekeep Today 1986; 7:10-1, 30. [PMID: 10277294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Patarca R, Dorta B, Ramirez JL. Creation of a data base for sequences of ribosomal nucleic acids and detection of conserved restriction endonucleases sites through computerized processing. Nucleic Acids Res 1982; 10:175-82. [PMID: 6278402 PMCID: PMC326124 DOI: 10.1093/nar/10.1.175] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
As part of a project pertaining the organization of ribosomal genes in Kinetoplastidae, we have created a data base for published sequences of ribosomal nucleic acids, with information in Spanish. As a first step in their processing, we have written a computer program which introduces the new feature of determining the length of the fragments produced after single or multiple digestion with any of the known restriction enzymes. With this information we have detected conserved SAU 3A sites: (i) at the 5' end of the 5.8S rRNA and at the 3' end of the small subunit rRNA, both included in similar larger sequences; (ii) in the 5.8S rRNA of vertebrates (a second one), which is not present in lower eukaryotes, showing a clear evolutive divergence; and, (iii) at the 5' terminal of the small subunit rRNA, included in a larger conserved sequence. The possible biological importance of these sequences is discussed.
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