1
|
Eiras P, Leon F, Camarero C, Lombardia M, Roldan E, Bootello A, Roy G. Intestinal intraepithelial lymphocytes contain a CD3- CD7+ subset expressing natural killer markers and a singular pattern of adhesion molecules. Scand J Immunol 2000; 52:1-6. [PMID: 10886777 DOI: 10.1046/j.1365-3083.2000.00761.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Intestinal intraepithelial lymphocytes (i-IEL) represent one of the largest, non-organized lymphoid population in the body. They are located outside the epithelial basement membrane among the mucosal epithelial cells. We, and previously other groups, have reported the presence of a CD7+CD3-IEL subset in the epithelium of human small intestine. This subset is drastically reduced in coeliac disease (CD) patients. In the present work we accomplish a better phenotypic characterization of this CD3-IEL subset and demonstrate the expression of typical natural killer (NK) cell markers. Most, if not all, CD3-CD7+ cells express NKPR1 (CD161)[98% +/- 2] and CD122[92% +/- 6]. In addition, a variable percentage express CD2[55% +/- 16], CD94[24% +/- 18], CD56[44% +/- 21] and CD16[12% +/- 4], however, no CD57 expression was observed. Moreover, these cells contain perforin granules[75% +/- 5], supporting a potential cytolytic ability. Regarding adhesion molecules, CD18 and CD44 expression is absent, which is consistent with a limited capacity of migration. Altogether, these data suggest the presence of intraepithelial NK cells in human intestinal epithelium, a compartment where cytotoxic effectors have not been clearly defined.
Collapse
|
|
25 |
60 |
2
|
Tarras S, Gadia C, Meister L, Roldan E, Gregorios JB. Homozygous protein C deficiency in a newborn. Clinicopathologic correlation. ARCHIVES OF NEUROLOGY 1988; 45:214-6. [PMID: 3341937 DOI: 10.1001/archneur.1988.00520260102029] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A rare case of homozygous protein C deficiency occurred in a newborn. The patient presented with purpura fulminans in the first few hours after birth and showed multiple hemorrhagic lesions on computed tomography of the brain at 5 days of age. Neurologic symptoms developed at two weeks and the patient died at 37 weeks. His protein C level was less than 5%. Autopsy revealed thrombosis of the dural sinuses, multiple cortical infarcts, intraparenchymal hemorrhages, and hydrocephalus. The pathologic findings are correlated with the neurologic deficits and previously documented cases are reviewed.
Collapse
|
Case Reports |
37 |
35 |
3
|
Pintado B, de la Fuente J, Roldan E. Permeability of boar and bull spermatozoa to the nucleic acid stains propidium iodide or Hoechst 33258, or to eosin: accuracy in the assessment of cell viability. Reproduction 2000. [DOI: 10.1530/jrf.0.1180145] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
|
25 |
26 |
4
|
Masi L, Agnusdei D, Bilezikian J, Chappard D, Chapurlat R, Cianferotti L, Devolgelaer JP, El Maghraoui A, Ferrari S, Javaid MK, Kaufman JM, Liberman UA, Lyritis G, Miller P, Napoli N, Roldan E, Papapoulos S, Watts NB, Brandi ML. Taxonomy of rare genetic metabolic bone disorders. Osteoporos Int 2015; 26:2529-58. [PMID: 26070300 DOI: 10.1007/s00198-015-3188-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Accepted: 05/26/2015] [Indexed: 12/26/2022]
Abstract
UNLABELLED This article reports a taxonomic classification of rare skeletal diseases based on metabolic phenotypes. It was prepared by The Skeletal Rare Diseases Working Group of the International Osteoporosis Foundation (IOF) and includes 116 OMIM phenotypes with 86 affected genes. INTRODUCTION Rare skeletal metabolic diseases comprise a group of diseases commonly associated with severe clinical consequences. In recent years, the description of the clinical phenotypes and radiographic features of several genetic bone disorders was paralleled by the discovery of key molecular pathways involved in the regulation of bone and mineral metabolism. Including this information in the description and classification of rare skeletal diseases may improve the recognition and management of affected patients. METHODS IOF recognized this need and formed a Skeletal Rare Diseases Working Group (SRD-WG) of basic and clinical scientists who developed a taxonomy of rare skeletal diseases based on their metabolic pathogenesis. RESULTS This taxonomy of rare genetic metabolic bone disorders (RGMBDs) comprises 116 OMIM phenotypes, with 86 affected genes related to bone and mineral homeostasis. The diseases were divided into four major groups, namely, disorders due to altered osteoclast, osteoblast, or osteocyte activity; disorders due to altered bone matrix proteins; disorders due to altered bone microenvironmental regulators; and disorders due to deranged calciotropic hormonal activity. CONCLUSIONS This article provides the first comprehensive taxonomy of rare metabolic skeletal diseases based on deranged metabolic activity. This classification will help in the development of common and shared diagnostic and therapeutic pathways for these patients and also in the creation of international registries of rare skeletal diseases, the first step for the development of genetic tests based on next generation sequencing and for performing large intervention trials to assess efficacy of orphan drugs.
Collapse
|
Consensus Development Conference |
10 |
23 |
5
|
Gutierrez-Reyes G, Lopez-Ortal P, Sixtos S, Cruz S, Ramirez-Iglesias MT, Gutierrez-Ruiz MC, Sanchez-Avila F, Roldan E, Vargas-Vorackova F, Kershenobich D. Effect of pentoxifylline on levels of pro-inflammatory cytokines during chronic hepatitis C. Scand J Immunol 2006; 63:461-467. [PMID: 16764700 DOI: 10.1111/j.1365-3083.2006.001761.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The cellular and humoral natural immune response induced by hepatitis C virus (HCV) is commonly unable to eradicate the virus. HCV is a highly mutable, hepatotropic RNA virus that causes acute and chronic hepatitis, an infection that involves the production of various cytokines. The aim of the study is to analyse the expression of pro-inflammatory cytokines IL-1beta, TNF-alpha, IFN-gamma and the chemokine CXCL8 (IL-8) in liver tissue and their expression and secretion in PBMC of patients with chronic hepatitis C (CHC), in response to pentoxyfilline (PTX). We studied six CHC patients, naive to treatment. Patients received PTX 400 mg twice a day/8 weeks. Pentoxyfilline resulted in decreased expression of mRNA of liver IL-1beta, TNF-alpha and IFN-gamma: 144.2 versus 83.5 molecules of IL-1beta (P < 0.05), TNF-alpha 194.3 versus 17.6 molecules (P = 0.03) and IFN-gamma 26.1 versus 0.5 molecules (P = 0.04). Following PTX, PBMC exhibited a decrease in IFN-gamma mRNA 12.2 versus 1.5 molecules (P = 0.028) and CXCL8 4.2 versus 2.5 molecules (P = 0.027). In PBMC, only the secretion of TNF-alpha was decreased 1109 versus 933.5 pg/ml, P = 0.046. Production of cytokines both locally (within the liver) and systemically (PBMC) may serve as biomarkers of the infection with hepatitis C. PTX inhibits the expression of several pro-inflammatory cytokines in the liver. These results indicate that it is worth exploring PTX in hepatitis in future clinical trials in nonresponders to antiviral treatment.
Collapse
|
|
19 |
23 |
6
|
Grueso E, Kuliszewska E, Roldan E, Perez-Tejeda P, Prado-Gotor R, Brecker L. DNA conformational changes induced by cationic gemini surfactants: the key to switching DNA compact structures into elongated forms. RSC Adv 2015. [DOI: 10.1039/c5ra03944d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The extent of DNA decompaction induced by m-s-m gemini surfactants depend on the surfactant's tail length and on spacer's length.
Collapse
|
|
10 |
22 |
7
|
Asiedu P, Moulton T, Blum CB, Roldan E, Lolacono NJ, Graziano JH. Metabolism of meso-2,3-dimercaptosuccinic acid in lead-poisoned children and normal adults. ENVIRONMENTAL HEALTH PERSPECTIVES 1995; 103:734-739. [PMID: 7588486 PMCID: PMC1522198 DOI: 10.1289/ehp.95103734] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Meso-2,3-dimercaptosuccinic acid (DMSA, or succimer) is an oral chelating agent for heavy-metal poisoning. While studying the urinary elimination of unaltered DMSA, altered DMSA (i.e., its mixed disulfides), and lead in children with lead poisoning, we observed a pattern of urinary drug elimination after meals suggestive of enterohepatic circulation. The excretion of lead in urine patterned the elimination of altered DMSA rather than the parent molecule. In addition, the half-life of elimination of DMSA via the kidney was positively associated with blood lead concentration. Two additional crossover studies of DMSA kinetics were conducted in normal adults to confirm the presence of enterohepatic circulation of DMSA after meals. In one, increases in plasma total DMSA concentration were observed after meals in all six subjects; these increases were prevented by cholestyramine administration 4, 8, and 12 hr after DMSA. In the second, the administration of neomycin also prevented increases in DMSA after meals. These studies indicate that 1) a metabolite(s) of DMSA undergoes enterohepatic circulation and that microflora are required for DMSA reentry; 2) in children, moderate lead exposure impairs renal tubular drug elimination; and 3) a metabolite of DMSA appears to be an active chelator.
Collapse
|
Clinical Trial |
30 |
17 |
8
|
Grueso E, Roldan E, Sanchez F. Kinetic Study of the Cetyltrimethylammonium/DNA Interaction. J Phys Chem B 2009; 113:8319-23. [DOI: 10.1021/jp810966n] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
|
16 |
17 |
9
|
Nicodemo D, Pauciullo A, Castello A, Roldan E, Gomendio M, Cosenza G, Peretti V, Perucatti A, Di Meo GP, Ramunno L, Iannuzzi L, Rubes J, Di Berardino D. X-Y sperm aneuploidy in 2 cattle (Bos taurus) breeds as determined by dual color fluorescent in situ hybridization (FISH). Cytogenet Genome Res 2009; 126:217-25. [PMID: 20016173 DOI: 10.1159/000245923] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/16/2009] [Indexed: 11/19/2022] Open
Abstract
The present study was undertaken to investigate aneuploidy rates in the sperm populations of 2 cattle (Bos taurus) breeds by using dual color fluorescent in situ hybridization (FISH) with Xcen and Y chromosome-specific painting probes, obtained by chromosome microdissection and DOP-PCR. Frozen semen from 10 Italian Friesian and 10 Italian Brown testing bulls was used for the investigation. For each bull, more than 5,000 sperm were analyzed, for a total of 52,586 and 51,342 sperm cells for the 2 breeds, respectively. The present study revealed - in both breeds - a preponderance of the Y-bearing sperm compared to the X-bearing sperm. Within each breed, a statistically significant variation in the various classes of aneuploidy (XX, YY and XY) was found: differences were found in the Friesian breed among the 3 diploidy classes, and in the Brown breed, among the 3 disomy classes (p < 0.05) as well as among the 3 diploidy classes (p < 0.01). However, the 2 breeds did not differ significantly in the overall mean rates of X-Y aneuploidy (disomy + diploidy) which amounts to 0.162% in the Italian Friesian and 0.142% in the Italian Brown. When meiosis I (MI) and II (MII) errors were compared, statistically significant differences (p < 0.01) were found in the disomy classes and in both breeds, whereas the differences between diploidy classes were not significant. Compared to humans, a lower level of aneuploidy has been found in the domestic species analyzed so far. The present study contributes to the establishment of a baseline level of aneuploidy in the sperm populations of 2 cattle breeds which could be used for monitoring future trends of reproductive health, especially in relation to environmental changes and mutagens.
Collapse
|
Research Support, Non-U.S. Gov't |
16 |
14 |
10
|
Navarro I, Gonzalez-Arjona D, Roldan E, Rueda M. Determination of paracetamol in tablets and blood plasma by differential pulse voltammetry. J Pharm Biomed Anal 1988; 6:969-76. [PMID: 16867370 DOI: 10.1016/0731-7085(88)80118-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/1987] [Indexed: 11/20/2022]
|
|
37 |
12 |
11
|
Grueso E, Kuliszewska E, Prado-Gotor R, Perez-Tejeda P, Roldan E. Improving the understanding of DNA–propanediyl-1,3-bis(dodecyldimethylammonium) dibromide interaction using thermodynamic, structural and kinetic approaches. Phys Chem Chem Phys 2013; 15:20064-74. [DOI: 10.1039/c3cp53299b] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
|
12 |
11 |
12
|
Lopez J, Ulibarrena C, Gonzalez-Porque P, Navas G, Roldan E, Cancelas JA, Perez-Oteyza J, Burgaleta C, García-Laraña J, Sastre JL. Amylase-producing Bence Jones multiple myeloma with pancreatitis-like symptoms. Acta Haematol 1993; 90:99-101. [PMID: 7506860 DOI: 10.1159/000204384] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Amylase-producing tumors are mainly adenocarcinomas and, in rare instances, multiple myelomas. We describe here a first case of amylase-producing Bence Jones type myeloma with pancreatitis-like symptoms and the second in a Caucasian patient. The finding of salivary-type hyperamylasemia in a 72-year-old female with a possible pancreatitis made us suspect the diagnosis. Amylase production was observed in bone marrow cultures in which 96% of cellularity was composed of plasmablasts. Serum amylase level decreased when chemotherapy was given.
Collapse
|
Case Reports |
32 |
8 |
13
|
Dominguez M, Roldan E, Molero M, Calvente J, Carbajo J, Andreu R. Keto-enol tautomerism in the electrochemical reduction of parabanic acid. J Electroanal Chem (Lausanne) 1990. [DOI: 10.1016/0022-0728(90)87430-r] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
|
35 |
7 |
14
|
Grueso E, Roldan E, Perez-Tejeda P, Kuliszewska E, Molero B, Brecker L, Giráldez-Pérez RM. Reversible DNA compaction induced by partial intercalation of 16-Ph-16 gemini surfactants: evidence of triple helix formation. Phys Chem Chem Phys 2018; 20:24902-24914. [PMID: 30234871 DOI: 10.1039/c8cp02791a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The interaction between calf thymus DNA and the gemini surfactants N,N'-[α,ω-phenylenebis(methylene)bis [N,N'-dimethyl-N-(1-hexadecyl)]-ammonium dibromide], p-16-Ph-16 (α = 1, ω = 3) and m-16-Ph-16 (α = 1, ω = 2), has been investigated via circular dichroism, fluorescence and UV-vis spectroscopy, zeta potential, dynamic light scattering, and AFM microscopy. Measurements were carried out in aqueous media at different molar ratios, R = (C16-Ph-16)/CDNA and C16-Ph-16 always below the critical micellar concentration (CMC) of the surfactant. Under these conditions, DNA undergoes two reversible conformational changes, compaction and decompaction, due to interaction with the surfactant molecules at low and high molar ratios, respectively. The extent of such conformational changes is correlated with both the degree of surfactant partial intercalation, and the size and charge of the surfactant aggregates formed, in each case. Comparison of the results shows that the para-form of the surfactant intercalates into the DNA to a major extent; therefore, the compaction/decompaction processes are more effective. Among these, the structure of the resulting 16-Ph-16/DNA decompacted complex is worthy of note. For the first time it can be demonstrated that the partial intercalation of the 16-Ph-16 gemini surfactants induces the formation of triplex DNA-like structures at a high R ratio.
Collapse
|
Journal Article |
7 |
7 |
15
|
Albasanz-Puig A, Rodríguez-Pardo D, Pigrau C, Lung M, Roldan E, Corona PS, Almirante B, Ruiz-Camps I. Necrotizing fasciitis in haematological patients: a different scenario. Ann Hematol 2020; 99:1741-1747. [PMID: 32399706 DOI: 10.1007/s00277-020-04061-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 04/27/2020] [Indexed: 12/19/2022]
Abstract
To describe and compare the characteristics of necrotizing fasciitis (NF) in patients with and without haematological malignancy. All adult patients diagnosed with NF and treated at our hospital were included (January 2010-March 2019). Diagnosis was based on intraoperative findings or consistent clinical/radiological characteristics, and patients were classified as group A (with haematological malignancy) or group B (without haematological malignancy). Student's t (quantitative), Fisher's exact (qualitative), and Kaplan-Meyer tests were used for the statistical analysis. The study included 29 patients: 8 in group A and 21 in group B. All haematological patients had severe neutropenia (0.2 [0.02-0.5] ×109 cells/L; p < 0.001) and positive blood cultures (100% vs. 61.9%; p = 0.04) at diagnosis. Gram-negative bacilli NF was more common in group A (87.5% vs. 9.5%; p = 0.001), predominantly due to Escherichia coli (50% vs. 9.5%; p = 0.056). Surgical treatment was less common in haematological patients (5 [62.5%] vs. 21 [100%]; p = 0.015). Overall, 9 (31%) patients died: 4 (50%) in group A and 5 (23.8%) in group B (p = 0.17). The univariate analysis showed that mortality tended to be higher (OR 3.2; 95%CI 0.57-17.7; p = 0.17) and to occur earlier (2.2 ± 2.6 vs. 14.2 ± 19.9 days; p = 0.13) in haematological patients. The LRINEC index > 6 did not predict mortality in either group. In our study, NF in patients with haematological malignancies was mainly due to Gram-negative bacilli, associated to high and early mortality rates. In our experience, the LRINEC scale was not useful for predicting mortality.
Collapse
|
Journal Article |
5 |
6 |
16
|
Cancelas JA, Hernández-Jodra M, Zamora C, Perez-Oteyza J, Brieva JA, Roldan E, Navas G, Garcia-Laraña J, Lopez J, Odriozola J. Circulating stem cell collection in lymphoma and myeloma after mobilization with cyclophosphamide and granulocyte colony-stimulating factor for autologous transplantation. Vox Sang 1994; 67:362-7. [PMID: 7535498 DOI: 10.1111/j.1423-0410.1994.tb01274.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We report the results of 72 leukapheresis procedures performed for autologous peripheral blood stem cell collection in 18 patients with lymphoma and myeloma, after combined mobilization with cyclophosphamide and granulocyte colony-stimulating factor (G-CSF). The numbers of mononuclear cells (MNCs), CD34+ cells and granulocyte-macrophage colony-forming units (CFU-GM) either in the peripheral circulation (preleukapheresis sample) or in the product obtained from leukapheresis (leukapheresis sample) were evaluated. A highly superior proportion of CD34+ cells (14-fold) and CFU-GM (5-fold) resulted from the mobilization therapy. CFU-GM and CD34+ cells were highly enriched with respect to all MNCs (relative recoveries: 2.13, range 0.3-41, and 1.08, range 0.2-8.5, respectively) due to an additional mobilization effect by the leukapheresis procedure. Also, a relatively strong linear correlation between the three different parameters was found in the leukapheresis product (CD34+:CFU-GM, r = 0.81; MNCs:CD34, r = 0.69; MNCs:CFU-GM, r = 0.75; CFU-GM:CD34+, and MNCs, r = 0.85). Our data suggest that the number of MNCs and CD34+ cells obtained after combined mobilization with cyclophosphamide and G-CSF can be used as predictor of the number of granulomonocytic progenitors.
Collapse
|
|
31 |
5 |
17
|
Sanchez F, Lopes-Costa T, Montilla F, Roldan E, Lopez-Cornejo P. On the applicability of the two state (pseudophase) model to photochemical reactions under restricted geometry conditions. J Photochem Photobiol A Chem 2012. [DOI: 10.1016/j.jphotochem.2012.08.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
|
13 |
4 |
18
|
Abstract
A case of an encephalomyelitis in a child with acute lymphoblastic leukemia is reported. The patient was a 5-year-old boy who developed seizures, progressive confusion, and coma after radiation and intrathecal methotrexate therapy. Computed tomography (CT) of the brain showed bilateral hypodensities in the posterior parietal and temporal regions. At autopsy, perivascular inflammation, microglial nodules without intranuclear viral inclusions, and bilateral necrosis of the temporoparietal and hippocampal regions were seen in the brain and spinal cord. Paraneoplastic encephalomyelitis is generally recognized in adult patients with underlying malignancy but, to our knowledge, has not been reported in children with leukemia. This report should alert the clinicians to an entity that must be included in the differential diagnosis of leukemic children with progressive neurologic disorder.
Collapse
|
Case Reports |
38 |
4 |
19
|
Bruno M, Roldan E, Diaz B. 261 Sequential vs. simultaneous administration of tamoxifen and medroxy progesterone acetate in advanced breast cancer. ACTA ACUST UNITED AC 1983. [DOI: 10.1016/0022-4731(83)91761-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
|
42 |
4 |
20
|
Dominguez M, Roldan E, Carbajo J, Calvente J, Gonzalez-Arjona D, Andreu R. Electrochemical reduction of benzil in strongly acid and alkaline media. J Electroanal Chem (Lausanne) 1991. [DOI: 10.1016/0022-0728(91)87041-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
|
34 |
3 |
21
|
Valverde-García A, Fernández-Alba AR, Herrera JC, Roldan E. Analysis of Buprofezin Residues in Vegetable Crops by Gas Chromatography with Mass Selective Detection in Selected Ion Monitoring Mode. J AOAC Int 2020. [DOI: 10.1093/jaoac/77.4.1041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
A gas chromatographic/mass selective detection (GC/MSD) method in selected ion monitoring (SIM) mode was used to determine buprofezin residues in vegetable samples. The electron impact ionization mass spectrum of buprofezin shows 3 characteristic peaks at m/z 105 (base peak), 172, and 305 (molecular ion peak), which were selected to quantify and confirm buprofezin residues in samples. Samples were extracted with ethyl acetate and sodium sulfate, and the extracts were cleaned up by gel permeation chromatography in an SX-3 Envirobeads column before GC/MSD analysis on a 25 m narrow-bore capillary column. Buprofezin recoveries from fortified samples of cucumber, pepper, tomato, squash, and eggplant were determined. The average recovery from cucumbers fortified at different levels (0.01, 0.05, 0.20, and 0.61 mg/kg) was 78%, and the standard deviation was 10% (n = 12). Very similar values were obtained for the 5 vegetable samples fortified at 0.20 mg/kg (n = 15). The limit of quantitation of the method for buprofezin in cucumbers was 0.01 mg/kg.
Collapse
|
|
5 |
3 |
22
|
Roldan E, Merani MS, Von Lawzewitsch I. Two abnormal chromosomes found in one cell line of a mosaic cow with low fertility. ACTA ACUST UNITED AC 1984; 16:135-42. [PMID: 22879155 DOI: 10.1186/1297-9686-16-2-135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
|
41 |
2 |
23
|
|
|
42 |
2 |
24
|
Turrens JF, Giulivi C, Pinus C, Roldan E, Lavagno C, Boveris A. Low level chemiluminescence from isolated rat hepatocytes, intact lung and intestine in situ. BASIC LIFE SCIENCES 1988; 49:239-42. [PMID: 2854984 DOI: 10.1007/978-1-4684-5568-7_37] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
|
37 |
1 |
25
|
Masi L, Agnusdei D, Bilezikian J, Chappard D, Chapurlat R, Cianferotti L, Devolgelaer JP, El Maghraoui A, Ferrari S, Javaid K, Kaufman JM, Liberman UA, Lyritis G, Miller P, Napoli N, Roldan E, Papapoulos S, Watts NB, Brandi ML. Erratum to: Taxonomy of rare genetic metabolic bone disorders. Osteoporos Int 2015; 26:2717-8. [PMID: 26370825 DOI: 10.1007/s00198-015-3237-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
Published Erratum |
10 |
1 |