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Bailón L, Sábato S, Coll J, Santos JR, Miranda C, Puig T, D Avolio A, Paredes R, Moltó J, Negredo E. Early virological failure with cabotegravir/rilpivirine. J Antimicrob Chemother 2024; 79:1193-1194. [PMID: 38385520 DOI: 10.1093/jac/dkae044] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024] Open
Affiliation(s)
- L Bailón
- HIV-Unit Infectious Diseases Department, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
- Department of Medicine, Autonomous University of Barcelona, Catalonia, Spain
- Fundació Lluita Contra les Infeccions, Badalona, Barcelona, Spain
| | - S Sábato
- Fundació Lluita Contra les Infeccions, Badalona, Barcelona, Spain
| | - J Coll
- IrsiCaixa AIDS Research Institute, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain
- Projecte dels Noms-Hispanosida, BCN-Checkpoint, Barcelona, Spain
| | - J R Santos
- HIV-Unit Infectious Diseases Department, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
- Fundació Lluita Contra les Infeccions, Badalona, Barcelona, Spain
| | - C Miranda
- Fundació Lluita Contra les Infeccions, Badalona, Barcelona, Spain
| | - T Puig
- IrsiCaixa AIDS Research Institute, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain
| | - A D Avolio
- Department of Medical Sciences, University of Turin, Turin, Italy
| | - R Paredes
- HIV-Unit Infectious Diseases Department, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
- Fundació Lluita Contra les Infeccions, Badalona, Barcelona, Spain
| | - J Moltó
- HIV-Unit Infectious Diseases Department, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
- Fundació Lluita Contra les Infeccions, Badalona, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Madrid, Spain
| | - E Negredo
- HIV-Unit Infectious Diseases Department, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
- Fundació Lluita Contra les Infeccions, Badalona, Barcelona, Spain
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Dela Rosa JGL, Catral CDM, Reyes NA, Opiso DMS, Ong EP, Ornos EDB, Santos JR, Quebral EPB, Callanta MLJ, Oliva RV, Tantengco OAG. Current status of hypertension care and management in the Philippines. Diabetes Metab Syndr 2024; 18:103008. [PMID: 38640838 DOI: 10.1016/j.dsx.2024.103008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 04/03/2024] [Accepted: 04/08/2024] [Indexed: 04/21/2024]
Abstract
AIMS In this paper, we discuss the existing data on the burden of hypertension in the Philippines and present the status of management, prevention, and control of hypertension in the country. METHODS A literature review was conducted to synthesize the status of hypertension care in the Philippines. RESULTS Hypertension continues to contribute to the country's leading causes of death. Similar to the global trend, almost half of hypertensive Filipinos are still not aware of their condition, and only 27 % have it under control. The prevalence of hypertension has steadily increased from 22 % in 1993 to 25.15 % in 2013. The 2020 Philippine Society for Hypertension clinical practice guideline defines hypertension as an office BP of 140/90 mm Hg or above following the proper standard BP measurement. During the past decade, monotherapy has been the mode of treatment in more than 80 % of Filipino patients. This could also explain why the BP control rates have been low. The most prevalent complications of hypertension in the Philippines were stroke (11.6 %), ischemic heart disease (7.7 %), chronic kidney disease (6.30 %), and hypertensive retinopathy (2.30 %). Hypertension causes economic tolls on patients, from the cost of drugs to hospitalization and complications. Hospitalization from hypertensive complications can easily wipe out the savings of middle-class families and is catastrophic for lower-income Filipinos. CONCLUSION In this review, we summarize the existing data on the burden of hypertension among Filipinos and the risk factors associated with the disease. We present the current screening tools, diagnostics, treatment, and prevention strategies for hypertension in the Philippines. Lastly, we propose solutions to meet the global targets of hypertension management and help relieve the growing burden of this disease.
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Affiliation(s)
| | | | | | - Danna Mae S Opiso
- College of Medicine, University of the Philippines, Ermita, Manila, Philippines
| | - Erika P Ong
- College of Medicine, University of the Philippines, Ermita, Manila, Philippines
| | - Eric David B Ornos
- Department of Medical Microbiology, College of Public Health, University of the Philippines, Ermita, Manila, Philippines
| | - Jerico R Santos
- Department of Medical Microbiology, College of Public Health, University of the Philippines, Ermita, Manila, Philippines
| | - Elgin Paul B Quebral
- Department of Medical Microbiology, College of Public Health, University of the Philippines, Ermita, Manila, Philippines
| | - Maria Llaine J Callanta
- Department of Biochemistry and Molecular Biology, College of Medicine, University of the Philippines, Ermita, Manila, Philippines
| | - Raymond V Oliva
- Department of Pharmacology and Toxicology, College of Medicine, University of the Philippines, Ermita, Manila, Philippines; Department of Medicine, University of the Philippines - Philippine General Hospital, Taft Avenue, Manila, Philippines
| | - Ourlad Alzeus G Tantengco
- Department of Physiology, College of Medicine, University of the Philippines, Ermita, Manila, Philippines; Department of Biology, College of Science, De La Salle University, Manila, Philippines.
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Silva RH, Lopes-Silva LB, Cunha DG, Becegato M, Ribeiro AM, Santos JR. Animal Approaches to Studying Risk Factors for Parkinson's Disease: A Narrative Review. Brain Sci 2024; 14:156. [PMID: 38391730 PMCID: PMC10887213 DOI: 10.3390/brainsci14020156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/25/2024] [Accepted: 01/31/2024] [Indexed: 02/24/2024] Open
Abstract
Despite recent efforts to search for biomarkers for the pre-symptomatic diagnosis of Parkinson's disease (PD), the presence of risk factors, prodromal signs, and family history still support the classification of individuals at risk for this disease. Human epidemiological studies are useful in this search but fail to provide causality. The study of well-known risk factors for PD in animal models can help elucidate mechanisms related to the disease's etiology and contribute to future prevention or treatment approaches. This narrative review aims to discuss animal studies that investigated four of the main risk factors and/or prodromal signs related to PD: advanced age, male sex, sleep alterations, and depression. Different databases were used to search the studies, which were included based on their relevance to the topic. Although still in a reduced number, such studies are of great relevance in the search for evidence that leads to a possible early diagnosis and improvements in methods of prevention and treatment.
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Affiliation(s)
- R H Silva
- Behavioral Neuroscience Laboratory, Department of Pharmacology, Universidade Federal de São Paulo, São Paulo 04021-001, SP, Brazil
| | - L B Lopes-Silva
- Behavioral Neuroscience Laboratory, Department of Pharmacology, Universidade Federal de São Paulo, São Paulo 04021-001, SP, Brazil
| | - D G Cunha
- Behavioral Neuroscience Laboratory, Department of Pharmacology, Universidade Federal de São Paulo, São Paulo 04021-001, SP, Brazil
| | - M Becegato
- Behavioral Neuroscience Laboratory, Department of Pharmacology, Universidade Federal de São Paulo, São Paulo 04021-001, SP, Brazil
| | - A M Ribeiro
- Laboratory of Neuroscience and Bioprospecting of Natural Products, Department of Biosciences, Universidade Federal de São Paulo, Santos 11015-020, SP, Brazil
| | - J R Santos
- Behavioral and Evolutionary Neurobiology Laboratory, Department of Biosciences, Federal University of Sergipe, Itabaiana 49500-000, SE, Brazil
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Santos JR, Silva CPA, Campos TF, Santos GLD. A IMPORTÂNCIA DA ANAMNESE DETALHADA NA SÍNDROME DO ANTICORPO ANTIFOSFOLÍPIDE: RELATO DE CASO. Hematol Transfus Cell Ther 2022. [DOI: 10.1016/j.htct.2022.09.488] [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: 11/07/2022] Open
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Sianoya AC, Ornos EDB, Santos JR, Tantengco OAG, Jimeno CA. Current status and challenges in the management of osteoporosis among men in the Philippines. Arch Osteoporos 2022; 17:116. [PMID: 36002776 DOI: 10.1007/s11657-022-01142-5] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 07/08/2022] [Indexed: 02/03/2023]
Affiliation(s)
- Abraham C Sianoya
- College of Medicine, University of the Philippines Manila, Manila, 1000, Philippines.
| | - Eric David B Ornos
- College of Medicine, University of the Philippines Manila, Manila, 1000, Philippines
| | - Jerico R Santos
- College of Medicine, University of the Philippines Manila, Manila, 1000, Philippines.,Department of Surgery, World Citi Medical Center, Quezon City, 1109, Philippines
| | | | - Cecilia A Jimeno
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Philippine General Hospital, Manila, 1000, Philippines.,Department of Pharmacology and Toxicology, College of Medicine, University of the Philippines, Manila, 1000, Philippines
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Casadellà M, Santos JR, Noguera-Julian M, Micán-Rivera R, Domingo P, Antela A, Portilla J, Sanz J, Montero-Alonso M, Navarro J, Masiá M, Valcarce-Pardeiro N, Ocampo A, Pérez-Martínez L, Pasquau J, Vivancos MJ, Imaz A, Carmona-Oyaga P, Muñoz-Medina L, Villar-García J, Barrufet P, Paredes R. Primary resistance to integrase strand transfer inhibitors in Spain using ultrasensitive HIV-1 genotyping. J Antimicrob Chemother 2021; 75:3517-3524. [PMID: 32929472 DOI: 10.1093/jac/dkaa349] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 07/03/2020] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Transmission of resistance mutations to integrase strand transfer inhibitors (INSTIs) in HIV-infected patients may compromise the efficacy of first-line antiretroviral regimens currently recommended worldwide. Continued surveillance of transmitted drug resistance (TDR) is thus warranted. OBJECTIVES We evaluated the rates and effects on virological outcomes of TDR in a 96 week prospective multicentre cohort study of ART-naive HIV-1-infected subjects initiating INSTI-based ART in Spain between April 2015 and December 2016. METHODS Pre-ART plasma samples were genotyped for integrase, protease and reverse transcriptase resistance using Sanger population sequencing or MiSeq™ using a ≥ 20% mutant sensitivity cut-off. Those present at 1%-19% of the virus population were considered to be low-frequency variants. RESULTS From a total of 214 available samples, 173 (80.8%), 210 (98.1%) and 214 (100.0%) were successfully amplified for integrase, reverse transcriptase and protease genes, respectively. Using a Sanger-like cut-off, the overall prevalence of any TDR, INSTI-, NRTI-, NNRTI- and protease inhibitor (PI)-associated mutations was 13.1%, 1.7%, 3.8%, 7.1% and 0.9%, respectively. Only three (1.7%) subjects had INSTI TDR (R263K, E138K and G163R), while minority variants with integrase TDR were detected in 9.6% of subjects. There were no virological failures during 96 weeks of follow-up in subjects harbouring TDR as majority variants. CONCLUSIONS Transmitted INSTI resistance remains rare in Spain and, to date, is not associated with virological failure to first-line INSTI-based regimens.
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Affiliation(s)
- M Casadellà
- IrsiCaixa AIDS Research Institute, Badalona, Catalonia, Spain
| | - J R Santos
- Lluita contra la SIDA Foundation, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
| | | | | | - P Domingo
- Infectious Diseases Unit, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - A Antela
- Infectious Diseases Unit, Santiago de Compostela Clinical University Hospital, Santiago de Compostela, Spain
| | - J Portilla
- Hospital General Universitario de Alicante, Alicante, Spain
| | - J Sanz
- University Hospital de La Princesa, Madrid, Spain
| | - M Montero-Alonso
- Infectious Diseases Unit, La Fe University and Polytechnic Hospital, Valencia, Spain
| | - J Navarro
- Infectious Diseases Department, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - M Masiá
- Infectious Diseases Unit, Elche University General Hospital, Elche, Spain
| | | | - A Ocampo
- HIV Unit, Hospital Álvaro Cunqueiro, Vigo, Spain
| | - L Pérez-Martínez
- Infectious Diseases Area, Hospital San Pedro-CIBIR, Logroño, Spain
| | - J Pasquau
- University Hospital Virgen de las Nieves, Granada, Spain
| | - M J Vivancos
- Infectious Diseases Unit, Ramón y Cajal Hospital, Madrid, Spain
| | - A Imaz
- HIV and STI Unit, Infectious Diseases Department, Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL), Hospitalet de Llobregat, Spain
| | - P Carmona-Oyaga
- Infectious Diseases Unit, Donostia University Hospital, San Sebastián, Spain
| | | | - J Villar-García
- Infectious Diseases Department, Hospital del Mar - IMIM, Barcelona, Spain
| | - P Barrufet
- Infectious Diseases Unit, Mataró Hospital, Mataró, Spain
| | - R Paredes
- IrsiCaixa AIDS Research Institute, Badalona, Catalonia, Spain.,Lluita contra la SIDA Foundation, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
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Pego AMF, Leyton V, Miziara ID, Bortolin RH, Freitas RCC, Hirata M, Tomaz PRX, Santos JR, Santos PCJL, Yonamine M. SNPs from BCHE and DRD3 genes associated to cocaine abuse amongst violent individuals from Sao Paulo, Brazil. Forensic Sci Int 2020; 317:110511. [PMID: 32998065 DOI: 10.1016/j.forsciint.2020.110511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 09/05/2020] [Accepted: 09/13/2020] [Indexed: 11/29/2022]
Abstract
Violence and drug abuse are highly destructive phenomena found world-wide, especially in Brazil. They seem to rise proportionally to one another and possibly related. Additionally, genetics may also play a role in drug abuse. This study has focused on identifying the use of cocaine within postmortem cases arriving at the Institute of Legal Medicine of Sao Paulo as well as the presence of certain single nucleotide polymorphisms (SNPs) to better understand one's susceptibility to abuse the drug. Both hair and blood samples have been extracted through a simple methanol overnight incubation or a rapid dilute-and-shoot method, respectively. The samples were then analyzed using an UPLC-ESI-MS/MS and genotyped through RT-PCR. Statistical analyses were performed via SPSS software. From 105 postmortem cases, 53% and 51% of the cases shown to be positive for cocaine in hair and blood, respectively. Genetic wise, a significant difference has been observed for SNP rs4263329 from the BCHE gene with higher frequencies of the genotypes A/G and G/G seen in cocaine users (OR=8.91; 95%CI=1.58-50.21; p=0.01). Likewise, also SNP rs6280 from the DRD3 gene presented a significant association, with both genotypes T/C and C/C being more frequent in users (OR=4.96; 95% CI=1.07-23.02; p=0.04). To conclude, a rather high proportion of cocaine has been found, which may suggest a connotation between the use of the drug and risky/violent behaviors. Additionally, significant associations were also found within two SNPs related to cocaine use, however, due to several inherent limitations, these must be confirmed.
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Affiliation(s)
- A M F Pego
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, Brazil; Dutch Screening Group, Maastricht, Netherlands.
| | - V Leyton
- Department of Legal Medicine, Ethics and Occupational Health, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
| | - I D Miziara
- Department of Legal Medicine, Ethics and Occupational Health, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil; Institute of Legal Medicine of São Paulo, Sao Paulo, Brazil
| | - R H Bortolin
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - R C C Freitas
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - M Hirata
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - P R X Tomaz
- Laboratory of Genetics and Molecular Cardiology, Heart Institute, University of Sao Paulo Medical School, Sao Paulo, Brazil
| | - J R Santos
- Laboratory of Genetics and Molecular Cardiology, Heart Institute, University of Sao Paulo Medical School, Sao Paulo, Brazil
| | - P C J L Santos
- Laboratory of Genetics and Molecular Cardiology, Heart Institute, University of Sao Paulo Medical School, Sao Paulo, Brazil; Department of Pharmacology, Paulista Medical School, Federal University of Sao Paulo, Sao Paulo, Brazil
| | - M Yonamine
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, Brazil
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Santos JR, Cozzi-Lepri A, Phillips A, De Wit S, Pedersen C, Reiss P, Blaxhult A, Lazzarin A, Sluzhynska M, Orkin C, Duvivier C, Bogner J, Gargalianos-Kakolyris P, Schmid P, Hassoun G, Khromova I, Beniowski M, Hadziosmanovic V, Sedlacek D, Paredes R, Lundgren JD. Long-term effectiveness of recommended boosted protease inhibitor-based antiretroviral therapy in Europe. HIV Med 2018; 19:324-338. [PMID: 29388732 DOI: 10.1111/hiv.12581] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/24/2017] [Indexed: 11/27/2022]
Abstract
OBJECTIVES The aim of the study was to evaluate the long-term response to antiretroviral treatment (ART) based on atazanavir/ritonavir (ATZ/r)-, darunavir/ritonavir (DRV/r)-, and lopinavir/ritonavir (LPV/r)-containing regimens. METHODS Data were analysed for 5678 EuroSIDA-enrolled patients starting a DRV/r-, ATZ/r- or LPV/r-containing regimen between 1 January 2000 and 30 June 2013. Separate analyses were performed for the following subgroups of patients: (1) ART-naïve subjects (8%) at ritonavir-boosted protease inhibitor (PI/r) initiation; (2) ART-experienced individuals (44%) initiating the new PI/r with a viral load (VL) ≤500 HIV-1 RNA copies/mL; and (3) ART-experienced patients (48%) initiating the new PI/r with a VL >500 copies/mL. Virological failure (VF) was defined as two consecutive VL measurements >200 copies/mL ≥24 weeks after PI/r initiation. Kaplan-Meier and multivariable Cox models were used to compare risks of failure by PI/r-based regimen. The main analysis was performed with intention-to-treat (ITT) ignoring treatment switches. RESULTS The time to VF favoured DRV/r over ATZ/r, and both were superior to LPV/r (log-rank test; P < 0.02) in all analyses. Nevertheless, the risk of VF in ART-naïve patients was similar regardless of the PI/r initiated after controlling for potential confounders. The risk of VF in both treatment-experienced groups was lower for DRV/r than for ATZ/r, which, in turn, was lower than for LPV/r-based ART. CONCLUSIONS Although confounding by indication and calendar year cannot be completely ruled out, in ART-experienced subjects the long-term effectiveness of DRV/r-containing regimens appears to be greater than that of ATZ/r and LPV/r.
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Affiliation(s)
- J R Santos
- Fight Against AIDS Foundation, Germans Trias i Pujol University Hospital, Barcelona, Spain
| | | | - A Phillips
- Royal Free and University College, London, UK
| | - S De Wit
- Centre Hospitalier Universitaire Saint-Pierre, Brussels, Belgium
| | - C Pedersen
- Odense University Hospital, Odense, Denmark
| | - P Reiss
- Academic Medical Center, Amsterdam, the Netherlands
| | - A Blaxhult
- Karolinska Institute, Venhälsan, Stockholm, Sweden
| | - A Lazzarin
- San Raffaele Scientific Institute, Milan, Italy
| | - M Sluzhynska
- Lviv Regional HIV/AIDS Prevention and Control Centre, Kiev, Ukraine
| | - C Orkin
- Royal London Hospital, London, UK
| | - C Duvivier
- Hôpital Necker-Enfants Malades, Paris, France
| | - J Bogner
- Medizinische Poliklinik, Munchen, Germany
| | | | - P Schmid
- Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| | - G Hassoun
- Rambam Health Care Campus, Haifa, Israel
| | - I Khromova
- Centre for HIV/AIDS and Infectious Diseases, Moscow, Russia
| | | | - V Hadziosmanovic
- Klinicki Centar Univerziteta Sarajevo (KCUS), Sarajevo, Bosnia & Herzegovina
| | - D Sedlacek
- Charles University Hospital, Plzen, Czech Republic
| | - R Paredes
- Fight Against AIDS Foundation, Germans Trias i Pujol University Hospital, Barcelona, Spain.,IrsiCaixa AIDS Research Institute, Barcelona, Spain.,Universitat de Vic-Universitat Central de Catalunya, Barcelona, Spain
| | - J D Lundgren
- Rigshospitalet and University of Copenhagen, Copenhagen, Denmark
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Santos JR, Brentanni MM, Tortelli T, Dale I, Waitzberg A, Waitzberg D, Ravacci G. Abstract P6-02-06: Metabolomic profiling of breast cancer and adjacent tissue. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-p6-02-06] [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: 11/16/2022]
Abstract
Abstract
Breast cancer (BC) is the most common cause of death among women worldwide. Nowadays, research directed toward the discovery of cancer molecular characteristics has extended into various biological aspects, from early investigations of cancer genomics and proteomics to recent efforts in cancer metabolomics. We consider that breast cancer cells display significantly altered cellular processes, and thus metabolites, compared to normal cells. In this regard, the application of metabolomics towards cancer research can led to the discovery of metabolite cancer biomarkers and the identification of target therapeutics. Methods: Metabolomics signature was extracted from primary BC and adjacent tissue samples from a cohort of 182 breast cancer patients from the Institut Gustave-Roussy and Institute Curie – Paris, University of Debrecen – Hungary, and University of Tartu – Estonia. The Biocrates Life Science® company, performed the metabolomics analysis using the Absolute IDQ p180 kit. Statistical analysis was performed by MetaboAnalyst 3.0 software (p <0.05). Results: We observed 99 differential metabolites between breast tumor and adjacent tissues (p<0,05). In the tumor tissue we observed an increase of glycolysis, glutamine uptake and synthesis, glutamate production, intermediates for redox homeostasis, as well reduction in tricarboxylic acid cycle and β –oxidation impairment. Together, these pathways, favor lipogenesis with a consequent increase in saturated fatty acids and cholesterol synthesis for the formation of membranes and lipid rafts in tumors. The increase in rafts in tumors maintains proliferation signaling via membrane receptors, making them important biomarkers. Conclusion: Metabolomics analysis is useful in identifying differential metabolites between breast cancer and adjacent tissue. In this scenario, cancer cells may be dependent on some metabolites for its development, making them therapeutically valuable biomarkers.
Citation Format: Santos JR, Brentanni MM, Tortelli T, Dale I, Waitzberg A, Waitzberg D, Ravacci G. Metabolomic profiling of breast cancer and adjacent tissue [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr P6-02-06.
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Affiliation(s)
- JR Santos
- University of São Paulo Medical School, São Paulo, Brazil; Federal University of São Paulo, São Paulo, Brazil
| | - MM Brentanni
- University of São Paulo Medical School, São Paulo, Brazil; Federal University of São Paulo, São Paulo, Brazil
| | - T Tortelli
- University of São Paulo Medical School, São Paulo, Brazil; Federal University of São Paulo, São Paulo, Brazil
| | - I Dale
- University of São Paulo Medical School, São Paulo, Brazil; Federal University of São Paulo, São Paulo, Brazil
| | - A Waitzberg
- University of São Paulo Medical School, São Paulo, Brazil; Federal University of São Paulo, São Paulo, Brazil
| | - D Waitzberg
- University of São Paulo Medical School, São Paulo, Brazil; Federal University of São Paulo, São Paulo, Brazil
| | - G Ravacci
- University of São Paulo Medical School, São Paulo, Brazil; Federal University of São Paulo, São Paulo, Brazil
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Ingles M, Crowfoot G, Smelaya TV, Kuzovlev AN, Salnikova LE, Bhikoo R, Khwannimit B, Bhurayanontachai R, Vattanavanit V, Tourteau E, Filali A, van Grunderbeeck N, Nigeon O, Bazus H, Masse J, Mallat J, Thevenin D, Prokhorenko I, Kabanov D, Zubova S, Grachev S, Salcedo M, Witte S, Cuvier V, Derive M, Gibot S, Garaud JJ, Kumar V, Chhibber S, Santos JR, Sevillejal JEAD, Nevado JB, Linge HM, Ochani K, Lin K, Lee JY, Wang P, Tembhre M, Liu SF, Singhal PC, Miller EJ, HO J, Liu X, Kwong T, Zhang L, Chan H, Wong SH, Choi G, Gin T, Chan MTV, Wu WKK, Vliegen G, Kehoe K, Verkerk R, Fransen E, Peters E, Lambeir AM, Pickkers P, Jorens PG, De Meester I, Ribeiro AB, Souza APT, Giusti H, Franci CR, Saia RS, Anderko RR, Jackson VM, Palmer OMP, Angus DC, Kellum JA, Carcillo JA, Verboom DM, Koster-Brouwer ME, van de Groep K, Frencken JF, Scicluna B, Gisbertz SS, Henegouwen MIVB, Ruurda JP, van Hillegersberg R, van der Poll T, Bonten MJM, Cremer OL, Verboom DM, Frencken JF, van der Poll T, Bonten MJM, Cremer OL, Klouwenberg PMCK, Beloborodova N, Osipov A, Pautova A, Bedova A, Mas-Oliva J, García-González V, Sukhina M, Zhukhovitskiy V, Sukhina MA, Obraztsov I, Zhukhovitskiy VG, Peronace C, Matera G, Galati L, Giancotti A, Barreca GS, Quirino A, Liberto MC, Focà A, Labiad Y, Venton G, Baier C, Colle J, Farnault L, Brunet C, Loriod B, Fernandez-Nunez N, Suchon P, Mattei JC, Rihet P, Nguyen C, Costello R, Tesfai A, Ahmetaj-Shala B, Gashaw H, Quinlan G, MacCallum N, Mumby S, Gray DN, Leiper J, Kirkby N, Mitchell JA, Costa LHA, Catalão CHR, Santos-Júnior NN, Souza AO, Alberici LC, Rocha MJA. Sepsis 2016 Paris. Crit Care 2016. [PMCID: PMC5260789 DOI: 10.1186/s13054-016-1518-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Nôga DAMF, Cagni FC, Santos JR, Silva D, Azevedo DLO, Araújo A, Silva RH, Ribeiro AM. Pro- and Anticonvulsant Effects of the Ant Dinoponera quadriceps (Kempf) Venom in Mice. Neotrop Entomol 2015; 44:410-417. [PMID: 26045053 DOI: 10.1007/s13744-015-0292-7] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Accepted: 03/18/2015] [Indexed: 06/04/2023]
Abstract
Epilepsy affects at least 50 million people worldwide, and the available treatment is associated with various side effects. Approximately 20-30% of the patients develop seizures that persist despite careful monitored treatment with antiepileptic drugs. Thus, there is a clear need for the development of new antiepileptic drugs, and the venoms can be an excellent source of probes. In this context, while there are studies on venoms from snakes, scorpions, and spiders, little is known regarding venom from ants. The aim of this study was to investigate the potential pro- and anticonvulsant effects of the venom from the ant Dinoponera quadriceps (Kempf) in Swiss mice. After the injection of the crude venom (DqTx-5, 50, and 500 mg/mL) in the lateral ventricle of mice, we observed a reduction of exploration and grooming behaviors, as well as an increase in immobility duration. In addition, the crude venom induced procursive behavior and tonic-clonic seizures at the highest concentration. Conversely, the preadministration of the denatured venom (AbDq) at the concentration of 2 mg/mL protected the animals against tonic-clonic seizures (66.7%) and death (100%) induced by administration of bicuculline. Taken together, the findings demonstrate that D. quadriceps venom might be potential source of new pro- and anticonvulsants molecules.
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Affiliation(s)
- D A M F Nôga
- Depto de Fisiologia, Univ Federal do Rio Grande do Norte, Natal, RN, Brasil
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Casadellà M, van Ham PM, Noguera-Julian M, van Kessel A, Pou C, Hofstra LM, Santos JR, Garcia F, Struck D, Alexiev I, Bakken Kran AM, Hoepelman AI, Kostrikis LG, Somogyi S, Liitsola K, Linka M, Nielsen C, Otelea D, Paraskevis D, Poljak M, Puchhammer-Stöckl E, Staneková D, Stanojevic M, Van Laethem K, Zidovec Lepej S, Clotet B, Boucher CAB, Paredes R, Wensing AMJ. Primary resistance to integrase strand-transfer inhibitors in Europe. J Antimicrob Chemother 2015; 70:2885-8. [PMID: 26188038 DOI: 10.1093/jac/dkv202] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 06/16/2015] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES The objective of this study was to define the natural genotypic variation of the HIV-1 integrase gene across Europe for epidemiological surveillance of integrase strand-transfer inhibitor (InSTI) resistance. METHODS This was a multicentre, cross-sectional study within the European SPREAD HIV resistance surveillance programme. A representative set of 300 samples was selected from 1950 naive HIV-positive subjects newly diagnosed in 2006-07. The prevalence of InSTI resistance was evaluated using quality-controlled baseline population sequencing of integrase. Signature raltegravir, elvitegravir and dolutegravir resistance mutations were defined according to the IAS-USA 2014 list. In addition, all integrase substitutions relative to HXB2 were identified, including those with a Stanford HIVdb score ≥ 10 to at least one InSTI. To rule out circulation of minority InSTI-resistant HIV, 65 samples were selected for 454 integrase sequencing. RESULTS For the population sequencing analysis, 278 samples were retrieved and successfully analysed. No signature resistance mutations to any of the InSTIs were detected. Eleven (4%) subjects had mutations at resistance-associated positions with an HIVdb score ≥ 10. Of the 56 samples successfully analysed with 454 sequencing, no InSTI signature mutations were detected, whereas integrase substitutions with an HIVdb score ≥ 10 were found in 8 (14.3%) individuals. CONCLUSIONS No signature InSTI-resistant variants were circulating in Europe before the introduction of InSTIs. However, polymorphisms contributing to InSTI resistance were not rare. As InSTI use becomes more widespread, continuous surveillance of primary InSTI resistance is warranted. These data will be key to modelling the kinetics of InSTI resistance transmission in Europe in the coming years.
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Affiliation(s)
- M Casadellà
- IrsiCaixa AIDS Research Institute, Universitat Autònoma de Barcelona, Badalona, Catalonia, Spain
| | - P M van Ham
- Department of Virology, Medical Microbiology, Utrecht Medical Centre, Utrecht, The Netherlands
| | - M Noguera-Julian
- IrsiCaixa AIDS Research Institute, Universitat Autònoma de Barcelona, Badalona, Catalonia, Spain Universitat de Vic-Universitat Central de Catalunya, Vic, Spain
| | - A van Kessel
- Department of Virology, Medical Microbiology, Utrecht Medical Centre, Utrecht, The Netherlands
| | - C Pou
- IrsiCaixa AIDS Research Institute, Universitat Autònoma de Barcelona, Badalona, Catalonia, Spain
| | - L M Hofstra
- Department of Virology, Medical Microbiology, Utrecht Medical Centre, Utrecht, The Netherlands Laboratory of Retrovirology, Luxembourg Institute of Health, Luxembourg
| | - J R Santos
- HIV Unit, Hospital Universitari Germans Trias I Pujol, Universitat Autònoma de Barcelona, Badalona, Catalonia, Spain
| | - F Garcia
- Complejo Hospitalario Univeristario de Granada, Instituto de Investigación IBS, Granada, Cohorte de Adultos de la Red de Investigación en SIDA (CoRIS) Spain
| | - D Struck
- Laboratory of Retrovirology, Luxembourg Institute of Health, Luxembourg
| | - I Alexiev
- National Center of Infectious and Parasitic Diseases, Sofia, Bulgaria
| | | | - A I Hoepelman
- Department of Virology, Medical Microbiology, Utrecht Medical Centre, Utrecht, The Netherlands
| | | | - S Somogyi
- Robert Koch-Institute, Berlin, Germany
| | - K Liitsola
- National Institute of Health and Welfare, Helsinki, Finland
| | - M Linka
- National Reference Laboratory for HIV/AIDS, National Institute of Public Health, Prague, Czech Republic
| | - C Nielsen
- Statens Serum Institut, Copenhagen, Denmark
| | - D Otelea
- National Institute for Infectious Diseases 'Prof. Dr. Matei Bals', Bucharest, Romania
| | - D Paraskevis
- National Retrovirus Reference Center, University of Athens, Athens, Greece
| | - M Poljak
- Slovenian HIV/AIDS Reference Centre, University of Ljubljana, Faculty of Medicine, Ljubljana, Slovenia
| | | | - D Staneková
- Slovak Medical University, Bratislava, Slovakia
| | - M Stanojevic
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - K Van Laethem
- Clinical and Epidemiological Virology, Rega Institute for Medical Research, Department of Microbiology and Immunology, KU Leuven, Belgium
| | - S Zidovec Lepej
- University Hospital for Infectious Diseases 'Dr. Fran Mihaljevic', Zagreb, Croatia
| | - B Clotet
- IrsiCaixa AIDS Research Institute, Universitat Autònoma de Barcelona, Badalona, Catalonia, Spain Universitat de Vic-Universitat Central de Catalunya, Vic, Spain Laboratory of Retrovirology, Luxembourg Institute of Health, Luxembourg
| | - C A B Boucher
- Department of Virology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - R Paredes
- IrsiCaixa AIDS Research Institute, Universitat Autònoma de Barcelona, Badalona, Catalonia, Spain Universitat de Vic-Universitat Central de Catalunya, Vic, Spain Laboratory of Retrovirology, Luxembourg Institute of Health, Luxembourg
| | - A M J Wensing
- Department of Virology, Medical Microbiology, Utrecht Medical Centre, Utrecht, The Netherlands
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13
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Silva TL, Silva MIA, Venancio LPR, Zago CES, Moscheta VAG, Lima AVB, Vizotto LD, Santos JR, Bonini-Domingos CR, Azeredo-Oliveira MTV. Simple method for culture of peripheral blood lymphocytes of Testudinidae. Genet Mol Res 2011; 10:3020-5. [PMID: 22180035 DOI: 10.4238/2011.december.6.2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We developed and optimized a simple, efficient and inexpensive method for in vitro culture of peripheral blood lymphocytes from the Brazilian tortoise Chelonoidis carbonaria (Testudinidae), testing various parameters, including culture medium, mitogen concentration, mitotic index, culture volume, incubation time, and mitotic arrest. Peripheral blood samples were obtained from the costal vein of four couples. The conditions that gave a good mitotic index were lymphocytes cultured at 37°C in minimum essential medium (7.5 mL), with phytohemagglutinin as a mitogen (0.375 mL), plus streptomycin/penicillin (0.1 mL), and an incubation period of 72 h. Mitotic arrest was induced by 2-h exposure to colchicine (0.1 mL), 70 h after establishing the culture. After mitotic arrest, the cells were hypotonized with 0.075 M KCl for 2 h and fixed with methanol/acetic acid (3:1). The non-banded mitotic chromosomes were visualized by Giemsa staining. The diploid chromosome number of C. carbonaria was found to be 52 in females and males, and sex chromosomes were not observed. We were able to culture peripheral blood lymphocytes of a Brazilian tortoise in vitro, for the preparation of mitotic chromosomes.
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Affiliation(s)
- T L Silva
- Departamento de Biologia, Centro de Estudos de Quelônios, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho", São José do Rio Preto, SP, Brasil.
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Moura MM, Cavaco BM, Pinto AE, Domingues R, Santos JR, Cid MO, Bugalho MJ, Leite V. Correlation of RET somatic mutations with clinicopathological features in sporadic medullary thyroid carcinomas. Br J Cancer 2009; 100:1777-83. [PMID: 19401695 PMCID: PMC2695700 DOI: 10.1038/sj.bjc.6605056] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Screening of REarranged during Transfection (RET) gene mutations has been carried out in different series of sporadic medullary thyroid carcinomas (MTC). RET-positive tumours seem to be associated to a worse clinical outcome. However, the correlation between the type of RET mutation and the patients' clinicopathological data has not been evaluated yet. We analysed RET exons 5, 8, 10-16 in fifty-one sporadic MTC, and found somatic mutations in thirty-three (64.7%) tumours. Among the RET-positive cases, exon 16 was the most frequently affected (60.6%). Two novel somatic mutations (Cys630Gly, c.1881del18) were identified. MTC patients were divided into three groups: group 1, with mutations in RET exons 15 and 16; group 2, with other RET mutations; group 3, having no RET mutations. Group 1 had higher prevalence (P=0.0051) and number of lymph node metastases (P=0.0017), and presented more often multifocal tumours (P=0.037) and persistent disease at last control (P=0.0242) than group 2. Detectable serum calcitonin levels at last screening (P=0.0119) and stage IV disease (P=0.0145) were more frequent in group 1, than in the other groups. Our results suggest that, among the sporadic MTC, cases with RET mutations in exons 15 and 16 are associated with the worst prognosis. Cases with other RET mutations have the most indolent course, and those with no RET mutations have an intermediate risk.
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Affiliation(s)
- M M Moura
- Centro de Investigação de Patobiologia Molecular (CIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Rua Prof. Lima Basto, 1099-023 Lisboa, Portugal.
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15
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Ferreira AC, Viana H, Carvalho F, Pinto JR, Galvão MJ, Nolasco F, Santos JR. Chronic allograft dysfunction-is there a treatment? Transplant Proc 2009; 41:874-6. [PMID: 19376376 DOI: 10.1016/j.transproceed.2009.01.052] [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: 10/20/2022]
Abstract
BACKGROUND The major causes of renal transplant loss are death and chronic allograft dysfunction (CAD). The aims of this study were to determine the incidence of CAD in our population and the relation between allograft survival and immunosuppressive regimens. METHODS We studied retrospectively 473 patients who received deceased donor kidney transplants with at least 1 allograft biopsy between January 1990 and May 2007. Clinical data included age, gender, biopsy data, and immunosuppression before and after kidney biopsy. Mean age was 45.4 +/- 12.7 years including 65% males with a mean follow-up of 6.7 +/- 4.5 years. CAD was observed in 177 of 473 biopsies: 48 patients showed interstitial fibrosis (IF); 101 chronic rejection (CR); 16 transplant glomerulopathy (TG); and 12, CR and TG. Mean follow-up since the discovery of the histologic feature was 60.5 +/- 50.5 months for IF; 38.3 +/- 40.8 for CR, and 18.2 +/- 19.2 for TG. RESULTS CAD, which was more common in younger patients (P = .03), correlated upon univariate and multivariate analysis with CKD stage 5d development (P < .001). Deposition of C4d in peritubular capillaries was more frequent among CAD patients (P = .004), an association with particular relevance to recipients with CR (P = .02) and TG (P < .001). When we analyzed CAD subpopulation, we observed a positive correlation between allograft survival and immunosuppression modification after biopsy. Substitution of sirolimus (40/177) was shown in univariate, multivariate and Cox regression analyses to be a renal protector (P < .002). Allograft survival was also correlated with initial mycophenolate mofetil versus azathioprine, (62/177) immunosuppression (P < .001). CONCLUSION CAD, a frequent histologic feature, may benefit from sirolimus conversion.
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Affiliation(s)
- A C Ferreira
- Nephrology Department, Hospital de Curry Cabral, Lisbon, Portugal.
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16
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Llibre JM, Santos JR, Puig T, Moltó J, Ruiz L, Paredes R, Clotet B. Prevalence of etravirine-associated mutations in clinical samples with resistance to nevirapine and efavirenz. J Antimicrob Chemother 2008; 62:909-13. [PMID: 18653487 DOI: 10.1093/jac/dkn297] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES To evaluate the expected activity of etravirine in clinical samples, according to mutational patterns associated with decreased virological response (VR). METHODS We identified 1586 routine clinical samples with resistance-associated mutations (RAMs) to nevirapine and efavirenz (K103N 60%, Y181C 37%, G190A 27%, V108I 13%). Concerning in vitro identified etravirine mutations, samples with F227C, Y181I, M230L or L100I plus K103N plus Y181C were considered highly resistant. Samples with two RAMs plus Y181C or V179D or K101E or Y188L were considered intermediate. The prevalence of 13 RAMs recently associated with decreased VR to etravirine in the DUET clinical trials was also investigated. RESULTS Most samples (69%) harboured more than one IAS-USA RAM to first-generation non-nucleoside reverse transcriptase inhibitors (NNRTIs): 42% harboured two RAMs, 21% three RAMs and 6% four or more RAMs. The prevalence of 13 specific etravirine RAMs was V179F 0.12%, G190S 3.9%, Y181V 0.1%, V106I 2.6%, V179D 1.6%, K101P 2.0%, K101E 10.1%, Y181C 36.9%, A98G 5.9%, V90I 6.9%, Y181I 3.6%, G190A 27% and L100I 9.1%. The five RAMs with the most impact on VR (V179F/D, G190S, Y181V and V106I) occurred less often. Overall, 8.2% of the samples had three or more etravirine RAMs and only 1.1% had four or more. In addition, patterns of RAMs previously associated with intermediate etravirine resistance were present in 26.2% of the samples, whereas 4.85% displayed patterns of high-degree resistance. CONCLUSIONS For RAMs associated with decreased VR, etravirine resistance in routine clinical samples was lower than previously reported. High-degree resistance was uncommon, even in patients with resistance to first-generation NNRTIs, whereas low-to-intermediate etravirine resistance was more common.
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Affiliation(s)
- J M Llibre
- Lluita contra la SIDA Foundation, Germans Trias i Pujol University Hospital, Ctra de Canyet s/n, 08916 Badalona, Barcelona, Spain.
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Santos JR, Llibre JM, Pérez-Álvarez N, Domingo P, Miralles C, Schapiro J, Clotet B. Mutations in the protease gene associated with virological failure to lopinavir-containing regimens in clinical samples. J Int AIDS Soc 2008. [DOI: 10.1186/1758-2652-11-s1-p191] [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: 11/10/2022] Open
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18
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Santos JR, Llibre JM, Moltó J, Perez N, García MC, Clotet B. Efficacy and safety of switching enfuvirtide to raltegravir in patients with viral suppression. J Int AIDS Soc 2008. [DOI: 10.1186/1758-2652-11-s1-p58] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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19
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Guido LF, Carneiro JR, Santos JR, Almeida PJ, Rodrigues JA, Barros AA. Simultaneous determination of E-2-nonenal and β-damascenone in beer by reversed-phase liquid chromatography with UV detection. J Chromatogr A 2004; 1032:17-22. [PMID: 15065771 DOI: 10.1016/j.chroma.2003.12.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [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: 11/20/2022]
Abstract
A method for the simultaneous determination of E-2-nonenal and beta-damascenone in beer by reversed-phase liquid chromatography using UV detection is presented. The method consists of beer steam distillation, followed by an extraction/concentration step using Sep-Pak Plus C18 RP cartridges and determination by HPLC at 226 nm UV-absorption maximum. The identity of the compounds was confirmed by GC analysis with MS detection of the isolated fractions. A recovery factor of approximately 80% was obtained for beta-damascenone with a R.S.D. of 3%. E-2-Nonenal and beta-damascenone were monitored in a comparative study of fresh and either naturally and forced aged beer. The results obtained show that both compounds have a similar behaviour through an extended storage of beer and consequently can be used as good analytical markers of beer ageing. Nevertheless, the use of beta-damascenone seems to be more convenient because this compound appears in beer in higher concentrations than E-2-nonenal, thus making it easier to measure.
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Affiliation(s)
- L F Guido
- Departamento de Química, Faculdade de Ciências, Centro de Investigação em Química da Universidade do Porto, Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
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20
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Abstract
The 1991 eruption of Mount Pinatubo in the Philippines is considered one of the most violent and destructive volcanic activities in the 20th century. Lahar is the Indonesian term for volcanic ash, and lahar flows resulting from the massive amount of volcanic materials deposited on the mountain's slope posed continued post-eruption threats to the surrounding areas, destroying lives, homes, agricultural products, and infrastructures. Risks of lahar flows were identified immediately after the eruption, with scientific data provided by the Philippine Institute of Volcanology, the U.S. Geological Survey, and other research institutions. However, competing political, economic, and social agendas subordinated the importance of scientific information to policy making. Using systemic risk analysis and management, this article addresses the issues of multiple objectives and the effective integration of scientific techniques into the decision-making process. It provides a modeling framework for identifying, prioritizing, and evaluating policies for managing risk. The major considerations are: (1) applying a holistic approach to risk analysis through hierarchical holographic modeling, (2) applying statistical methods to gain insight into the problem of uncertainty in risk assessment, (3) using multiobjective trade-off analysis to address the issue of multiple decisionmakers and stakeholders in the decision-making process, (4) using the conditional expected value of extreme events to complement and supplement the expected value in quantifying risk, and (5) assessing the impacts of multistage decisions. Numerical examples based on ex post data are formulated to illustrate applications to various problems. The resulting framework from this study can serve as a general baseline model for assessing and managing risks of natural disasters, which the Philippines' lead agency-the National Disaster Coordinating Council (NDCC)-and other related organizations can use for their decision-making processes.
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Affiliation(s)
- M F Leung
- Department of Systems and Information Engineering, University of Virginia, Virginia, USA
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21
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Santos JR, Carneiro JR, Guido LF, Almeida PJ, Rodrigues JA, Barros AA. Determination of E-2-nonenal by high-performance liquid chromatography with UV detection assay for the evaluation of beer ageing. J Chromatogr A 2003; 985:395-402. [PMID: 12580508 DOI: 10.1016/s0021-9673(02)01396-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [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: 11/25/2022]
Abstract
The analysis of E-2-nonenal is of considerable interest for the brewery industry as this compound is claimed to be responsible for a paper/cardboard unpleasant flavour. Usually, the presence of E-2-nonenal can be noticed in aged beers at levels higher than 0.1 microg/l. In this work, an analytical method was developed to determine E-2-nonenal in beer involving steam distillation of beer followed by an extraction/concentration step using solid-phase extraction and determination of E-2-nonenal by HPLC with UV detection. Fastness and simplicity are the main advantages of the proposed method, when compared with other existing methodologies for the determination of E-2-nonenal in beer. Using the developed conditions, the interference of E-2-nonenal formed by degradation of its precursors during steam distillation is almost negligible. The presence of sulphur dioxide at legal levels does not interfere with the assay. The method was used in a comparative study of fresh and either naturally or forced aged beers. A much larger chromatographic peak was found near the peak of E-2-nonenal that correlates well with the peak of E-2-nonenal. Identification of the corresponding compound is currently under investigation, considering its future application on the evaluation of beer ageing.
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Affiliation(s)
- J R Santos
- Centro de Investigação em Química da Universidade do Porto. Departamento de Química da Faculdade de Ciências do Porto, Rua Campo Alegre 687, 4169-007 Porto, Portugal
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22
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da Silva RJ, Lino MJ, Ribeiro A, Santos JR. Expression of results with uncertainty for the determination of pesticides in melon--experience in a proficiency test. Analyst 2001; 126:743-6. [PMID: 11445930 DOI: 10.1039/b102163j] [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: 11/21/2022]
Abstract
The expression of results with an uncertainty through the "bottom-up" approach, involving the estimation and combination of all the sources of uncertainty, represents a challenge when the analytical method includes mass transfer steps (MTS). These steps (e.g. extraction, evaporation, digestion, etc.) with inherently different from 100% recoveries lack models capable of describing their precision and efficiency. Recently, a new methodology was published aimed at the estimation of the performance of these critical steps. Comparison of the experimental dispersion from the replicated analysis of spiked samples with the combination of the uncertainty associated with gravimetric, volumetric and instrumental quantification steps (described by well established models) allows the estimation of the MTS uncertainty. Evaluation of the behaviour of the MTS within the analytical range supports the use of developed estimations over a wide concentration range. This methodology was applied, with success, to the determination of pesticide residues in melon in one particular proficiency test organised by the Food Analysis Performance Assessment Scheme (FAPAS) between November 2000 and February 2001.
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Affiliation(s)
- R J da Silva
- Direcção Geral de Protecção das Culturas, Quinta do Marquês, PT-2780-155, Oeiras, Portugal
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da Silva RJ, Lino MJ, Santos JR, Camões MF. Estimation of precision and efficiency mass transfer steps for the determination of pesticides in vegetables aiming at the expression of results with reliable uncertainty. Analyst 2000; 125:1459-64. [PMID: 11002928 DOI: 10.1039/b000801j] [Citation(s) in RCA: 21] [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: 11/21/2022]
Abstract
A 'bottom-up' approach for the expression of results obtained from analytical methods that include analytical steps with recovery inherently different from 100% [mass transfer steps (MTS): extraction, evaporation, clean-up procedures, digestion, etc.] is presented. The estimation of the combination of all MTS uncertainty involves the comparison of the experimental dispersion of replicated analyses of spiked samples with the estimation of the uncertainty obtained for the combination of all uncertainty sources except MTS ones ('incomplete' estimation). The estimation of MTS uncertainty by difference is performed after evaluating the statistical difference between the 'incomplete' estimation and the experimental dispersion (F-test). When the two estimations are statistically equivalent, the MTS uncertainty is considered to be negligible in relation to the other sources budget. The assumption of constancy of MTS performance within the analytical range is tested through single analyses at several concentration levels and is evaluated by the inclusion of the expected values at the intervals resulting from the combination of the MTS uncertainty estimation performed at one concentration level and the 'incomplete' estimation. The developed methodology can also be useful for method optimisation and validation and for the detection of small trends in results. The determination of pesticides in sweet peppers by GC-NPD was used to explore the above concepts.
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Affiliation(s)
- R J da Silva
- CECUL, Faculdade de Ciências da Universidade de Lisboa, Portugal
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Abstract
This study investigated whether primary culture of human amniotic membrane cells (PCHAM) could be used as an in vitro model system for the study of interferon (IFN) production. PCHAM cells infected with Newcastle disease virus (NDV) produced the two antigenic types of IFN, previously shown in a amniotic membrane cells (HAM) system. PCHAM IFN was detected as early as 2 h after NDV infection and was composed by two antigenically distinct fractions, one neutralized with anti-HuIFN beta antibody and another that is not related to IFN beta, -alpha and -gamma. These fractions correspond respectively to 80 and 20 per cent of the IFN produced 4 h after virus induction, 55 and 45 per cent of the IFN produced from 4 to 12 h and 67 and 33 per cent of the IFN produced 12 h after virus induction. A cDNA library, established from PCHAM with or without NDV infection, was screened for IFN alpha and -beta using specific primers. The PCR product, amplified by IFN beta primers, was cloned, sequenced and expressed in Escherichia coli M15. The sequences of several cloned cDNAs were identical to HuIFN beta gene and the antiviral activity of the expressed protein was neutralized only by antiHuIFN-beta antibody. The other IFN fraction not neutralized by polyclonal antibodies anti-IFN beta, -alpha and -gamma is now being studied.
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Affiliation(s)
- A F Carvalho
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Roque L, Clode A, Belge G, Pinto A, Bartnitzke S, Santos JR, Thode B, Bullerdiek J, Castedo S, Soares J. Follicular thyroid carcinoma: chromosome analysis of 19 cases. Genes Chromosomes Cancer 1998; 21:250-5. [PMID: 9523201] [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: 02/06/2023] Open
Abstract
Short-term cultures of 19 follicular thyroid carcinomas were examined cytogenetically. Clonal chromosomal changes were detected in 12 tumors. Two follicular carcinomas had only numerical alterations: one with a hyperdiploid karyotype with trisomies/polysomies of chromosomes 7 and 12, similar to the karyotypes previously identified in a sub-group of benign thyroid lesions, and the other with monosomy 20. In the remaining ten cases several structural chromosome anomalies were found. Loss of the short arm of chromosome 3 was observed in one tumor. In two widely invasive and metastasizing follicular carcinomas there was a t(7;8)(p15;q24) as the sole abnormality in one case and a der(8)t(7;8)(p15;q24) together with other cytogenetic alterations in the other case. This finding suggests that t(7;8)(p15;q24) may be related to an aggressive behavior of follicular thyroid carcinomas.
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Affiliation(s)
- L Roque
- CIPM-Portuguese Cancer Institute, Lisbon, Portugal
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26
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Tan HZ, Durlach NI, Rabinowitz WM, Reed CM, Santos JR. Reception of Morse code through motional, vibrotactile, and auditory stimulation. Percept Psychophys 1997; 59:1004-17. [PMID: 9360474 DOI: 10.3758/bf03205516] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The potential for communication through the kinesthetic aspect of the tactual sense was examined in a series of experiments employing Morse code signals. Experienced and inexperienced Morse code operators were trained to identify Morse code signals that were delivered as sequences of motional stimulation through up-down displacements (roughly 10 mm) of the fingertip. Performance on this task was compared with that obtained for both vibrotactile and acoustic presentation of Morse code using a 200-Hz tone delivered either to the fingertip through a minishaker or diotically to the two ears under headphones. For all three modalities, the ability to receive Morse code was examined as a function of presentation rate for tasks including identification of single letters, random three-letter sequences, common words, and sentences. Equivalent word-rate measures (i.e., product of percent correct scores and stimulus presentation rate) were nearly twice as high for auditory presentation as for vibrotactile stimulation, which in turn was about 1.3 times that for motional stimulation. The experienced subjects outperformed the inexperienced subjects by amounts that increased with task complexity. For example, the former were able to receive sentences at 18 words/min with motional stimulation, whereas the latter, following 75 h of training, were unable to perform this task. The present results and those of other research with tactual communication systems are compared, particularly regarding estimates of information-transfer rates.
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Affiliation(s)
- H Z Tan
- Massachusetts Institute of Technology, Media Laboratory, Cambridge 02139, USA.
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27
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Bugalho MJ, Frade JP, Santos JR, Limbert E, Sobrinho L. Molecular analysis of the RET proto-oncogene in patients with sporadic medullary thyroid carcinoma: a novel point mutation in the extracellular cysteine-rich domain. Eur J Endocrinol 1997; 136:423-6. [PMID: 9150704 DOI: 10.1530/eje.0.1360423] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Germline point mutations in the RET proto-oncogene are associated with multiple endocrine neoplasia type 2 (2A and 2B) and familial medullary thyroid carcinoma. On the other hand, somatic point mutations of RET have been described in a subset of sporadic medullary thyroid carcinomas (MTCs). We examined tumor and blood DNA of thirteen apparently sporadic MTC patients for mutations in RET exons 10, 11, 13, 15 and 16 to determine whether they had true sporadic tumors or either de novo or occult germline mutations. Three different somatic missense mutations were documented in seven patients. In five patients a mutation in exon 16, codon 918, (ATG-->ACG) causing a Met-->Thr substitution was found. In the remaining two patients the mutation affected exon 11: codon 630 in one case and codon 634 in the other. In both cases a T-->C transversion was identified causing a Cys-->Arg substitution. In conclusion, absence of a germline mutation in RET exons 10, 11, 13 or 16 is evidence against an inherited form in all cases. In seven patients, identification of a somatic mutation supported the previous clinical diagnosis of sporadic medullary thyroid carcinoma; in one of them we identified a hitherto undescribed somatic point mutation at codon 630.
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Affiliation(s)
- M J Bugalho
- Laboratório de Biologia Molecular, Instituto Português de Oncologia, Lisboa, Portugal
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28
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Bugalho MJ, Roque L, Sobrinho LG, Hoog A, Nunes JF, Almeida JM, Leitão CN, Santos JR, Pereira MC, Santos MA. Calcitonin-producing insulinoma: clinical, immunocytochemical and cytogenetical study. Clin Endocrinol (Oxf) 1994; 41:257-60. [PMID: 7923832 DOI: 10.1111/j.1365-2265.1994.tb02539.x] [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: 01/27/2023]
Abstract
The case of a patient with a large goitre associated with hypercalcitoninaemia and fasting hypoglycaemia is reported. Pentagastrin (PG) test was negative. Repeated measurements of fasting glycaemia, insulin and C peptide established the diagnosis of insulinoma. After localization by endoscopic ultrasonography, a distal pancreatectomy was performed and a small insulinoma was recovered. Glycaemia and calcitonin (CT) became normal. The tumour cells displayed a strong immunoreactivity for insulin and CT. Cytogenetical evaluation of the tumour revealed a translocation t(1;9) (p13;p22).
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Affiliation(s)
- M J Bugalho
- Department of Endocrinology, Portuguese Cancer Institute, Lisbon, Portugal
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29
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Clode AL, Fonseca I, Santos JR, Soares J. Mucoepidermoid carcinoma of the salivary glands: a reappraisal of the influence of tumor differentiation on prognosis. J Surg Oncol 1991; 46:100-6. [PMID: 1992215 DOI: 10.1002/jso.2930460207] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Thirty-nine cases of mucoepidermoid carcinoma of the salivary glands were reviewed for a reappraisal of the influence of the grade of differentiation on the outcome of the disease. The age of the patients ranged between 7 and 84 years. Fifteen patients were females and 24 males. The tumors were located at the parotid gland (n = 30), the submaxillary gland (n = 1), the soft palate (n = 5) and the oral mucosa NOS (n = 3). At presentation 4 tumors were intraglandular and 35 extraglandular; three patients had lymph node metastases and one patient lung metastases. The grade of differentiation was assessed using the criteria of Healey et al. Twelve tumors were classified as grade I, 17 as grade II, and 10 as grade III. Follow-up information was obtained with a duration of 5-144 months (mean 44.7 months). Six cases recurred locally and 5 developed metastases. Five years cumulative survival was 100% for grade I, 70.1% for grade II, and 47.2% for grade III. The results point to the usefulness of the assessment of the grade of differentiation as a guide to anticipate the outcome of the disease.
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Affiliation(s)
- A L Clode
- Serviço de Patologia Morfológica, Instituto Português de Oncologia dé Francisco Gentil, Centro de Lisboa, Portugal
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30
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Ponce P, Correia R, Guimarães P, Freitas M, Barata JD, Santos JR. [Hydro-electrolyte changes induced by transurethral prostatic resection]. ACTA MEDICA PORT 1989; 2:263-5. [PMID: 2624153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Transurethral resection prostatectomy (TURP) has been associated with severe hyponatremia due to massive absorption of bladder irrigation fluid (IF). TURP was performed in 41 patients using Sorbitol-Mannitol IF (Group A) and in 6 patients using distilled water (Group B). Six other patients were operated upon using surgical procedures identical in time and type of anesthesia to TURP (Group C). The three groups were studied with the same protocol that included blood collected before (time I), immediately after (time II) the procedure and 1 hour later (time III). Serum sodium decreased significantly in the 3 groups from time I to time II, an average of 3.4 mEq/l with Mannitol-Sorbitol, 2.3 mEq/l with distilled water, and 4.4 mEq/l in group C. Osmolality did not change significantly between the 3 times of collection and Osmolar Gap only increased from time I to II in the Sorbitol-Mannitol group. In conclusion, mild decrements in serum sodium with no clinical relevance are a common post-TURP finding, but should not be greater than in other similar general surgery without bladder irrigation. Hyposmolality did not constitute a problem.
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31
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Cruz J, Ponce P, Moreira P, Santos JR. [Catheterization of the subclavian vein as vascular access for hemodialysis]. ACTA MEDICA PORT 1985; 6:217-9. [PMID: 3832806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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32
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Abstract
To verify the action of heparin on peritoneal transport, we selected 20 patients on acute peritoneal dialysis and performed two 2-hour cycles with 2,000 cm3 of a 1.5% solution, adding 2,000 units of heparin to the second cycle. The patients were also randomized into 2 groups: group A, adding 1.5 mg gentamycin/kg to the dialysate of cycle I (without heparin), and group B, adding the same dose of gentamycin to cycle II (with heparin). At the end of each of the two cycles blood and dialysate were drawn for urea, creatinine, glucose, proteins and gentamycin levels, using peritoneal clearances of urea and creatinine, glucose absorption and net protein loss to compare cycle I with cycle II. We found that the peritoneal transport of creatinine and urea was improved (p less than 0.02; p less than 0.05) and glucose absorption increased (p less than 0.01) with heparin, without any significant change in protein loss. Contrary to common belief, heparin in a 1,000-U/l dose improved the absorption of gentamycin from the dialysate (p less than 0.01).
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