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Jurado-Martos F, Cardoso-Toset F, Tarradas C, Galán-Relaño Á, Sánchez-Carvajal JM, Ruedas-Torres I, Vera E, Larenas-Muñoz F, Gómez-Gascón L, Rodríguez-Gómez IM, Carrasco L, Gómez-Laguna J, Lorenzo BH, Luque I. Diagnostic performance of faecal and tissue multiplex qPCR IS900/F57 for the detection of Mycobacterium avium subspecies paratuberculosis in cattle. Res Vet Sci 2023; 161:156-162. [PMID: 37406574 DOI: 10.1016/j.rvsc.2023.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 05/17/2023] [Accepted: 06/05/2023] [Indexed: 07/07/2023]
Abstract
Mycobacterium avium subspecies paratuberculosis (MAP) is responsible for bovine-paratuberculosis (bPTB), which causes high production losses in cattle. A cross-sectional study was conducted in 228 cattle to evaluate the validity and diagnostic utility of a multiplex real-time PCR (qPCR) on faecal and intestinal samples [ileocaecal valve (ICV) and ileocaecal lymph nodes (ICLN)], using intestinal tissue culture as a reference test. Based on the sensitivity, specificity, and likelihood ratios (LR) obtained, the diagnostic value of faecal qPCR for confirming MAP infection was moderate (sensitivity 50.3%, specificity 93.5%, positive LR 7.8), and low to rule it out (negative LR 0.5). In areas with a prevalence of >23% the credibility of positive results was higher than 70%. In the case of negative results, their credibility was higher than 90% in herds with an infection rate below 19%, so faecal qPCR would be very useful in these areas to certify the absence of infection. For post-mortem diagnosis, qPCR on ICV samples showed good diagnostic accuracy to confirm the disease (sensitivity 71.7%, specificity 93.3%, positive LR 10.8), with a credibility higher than 70% in animals from areas or herds with a prevalence of infection greater than or equal to 18%. The best strategy to rule out the disease was the parallel combination of both tissues (ICV + ICLN) (sensitivity 81.3%, specificity 89.5%, negative LR 0.2) with a credibility of over 95% in animals from areas with an infection prevalence of 0-20%. Faecal and tissues qPCR techniques can be used to monitor bPTB, the interpretation of results, according to epidemiological situation of the herd or area, are shown.
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Galán-Relaño Á, Sánchez-Carvajal J, Gómez-Gascón L, Vera E, Huerta B, Cardoso-Toset F, Gómez-Laguna J, Astorga R. Phenotypic and genotypic antibiotic resistance patterns in Salmonella Typhimurium and its monophasic variant from pigs in southern Spain. Res Vet Sci 2022; 152:596-603. [DOI: 10.1016/j.rvsc.2022.09.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 09/18/2022] [Accepted: 09/23/2022] [Indexed: 10/14/2022]
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Trillo-Calvo E, Colás C, Vera E. Proyecto INCLIASMA - inercia clínica en asma. Semergen 2022; 48:316-322. [DOI: 10.1016/j.semerg.2022.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 03/07/2022] [Accepted: 03/08/2022] [Indexed: 10/18/2022]
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Sánchez-Carvajal JM, Galán-Relaño Á, Ruedas-Torres I, Jurado-Martos F, Larenas-Muñoz F, Vera E, Gómez-Gascón L, Cardoso-Toset F, Rodríguez-Gómez IM, Maldonado A, Carrasco L, Tarradas C, Gómez-Laguna J, Luque I. Real-Time PCR Validation for Mycobacterium tuberculosis Complex Detection Targeting IS 6110 Directly From Bovine Lymph Nodes. Front Vet Sci 2021; 8:643111. [PMID: 33981742 PMCID: PMC8109245 DOI: 10.3389/fvets.2021.643111] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 02/22/2021] [Indexed: 11/25/2022] Open
Abstract
Rapid and accurate diagnostic tools, such as Real-Time PCR (qPCR), need to be implemented as a confirmatory test in the framework of bovine tuberculosis (bTB) surveillance and control programs, shortening the turnaround time to confirm bTB infection. The present study aimed to evaluate a direct qPCR from fresh tissue samples targeting the insertion sequence IS6110 using individually homogenized bovine lymph nodes compared with microbiological culture. Retropharyngeal, tracheobronchial, and mesenteric lymph nodes fresh tissue samples (n = 687) were collected from 230 different cattle carcasses at the slaughterhouse. Only 23 of the 230 examined animals showed tuberculosis-like lesions, with 62 of 230 considered as positive. Among these 62 animals, 61 resulted as culture-positive, whereas 48 were qPCR-positive. Thus, this qPCR targeting IS6110 showed an apparent diagnostic sensitivity and specificity values of 77.1% [95% confidence interval (CI): 66.5–87.6%] and 99.4% (95% CI: 98.3–100.6%), respectively, and a positive predictive value of 97.9% (95% CI: 93.9–102.0%) and negative predictive value of 92.3% (95% CI: 88.4–96.2%). Positive and negative likelihood ratios were 130.2 and 0.2, respectively, and the agreement between microbiological culture and this qPCR was almost perfect (κ = 0.82). These results highlight this qPCR targeting IS6110 as a suitable complementary method to confirm bTB in animals with either tuberculosis-like lesions or non-tuberculosis-like lesions, decreasing the number of samples subjected to microbiological culture and, hence, its overall associated costs and the turnaround time (under 48 h) to confirm bTB infection. Besides, sampling mesenteric lymph node, which is uncommonly sampled, together with tracheobronchial and retropharyngeal ones, is advisable during postmortem inspection in bTB surveillance programs at the slaughterhouse, especially in areas with a low bTB prevalence scenario.
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Vera E, Lucio D, Fernandes LA, Velho L. Hough Transform for real-time plane detection in depth images. Pattern Recognit Lett 2018. [DOI: 10.1016/j.patrec.2017.12.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Armstrong TS, Gilbert MR, Bondy M, Sulman E, Yuan Y, Zhou R, Vera E, Wendland M, Pugh S, Scheurer M. OS05.6 Final risk model for Temozolomide (TMZ)-Myelotoxicity in patients with Glioblastoma treated on NRG Oncology’s RTOG 0825. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Faundez E, Vega N, Vera E, Vega P, Sepulveda D, Wortsman X. Clinical and color Doppler ultrasound evaluation of polyacrylamide injection in HIV patients with severe facial lipoatrophy secondary to antiretroviral therapy. Skin Res Technol 2016; 23:243-248. [PMID: 27796065 DOI: 10.1111/srt.12329] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/23/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND/PURPOSE Facial lipoatrophy in HIV patients, secondary to antiretroviral therapy (ART) with thymidine analogs, has been related to important psychosocial alterations and poor adherence to treatment. Polyacrylamide gel (PAAG) is a filler that has been used for treating facial lipoatrophy in HIV patients. The aim was to assess the clinical and sonographic anatomical changes after injection of PAAG in HIV patients with facial lipoatrophy secondary to ART. METHODS HIV patients receiving ART and suffering from severe facial lipoatrophy were recruited and underwent clinical and color Doppler ultrasound evaluation prior to PAAG application (AQUAMID® ) and sonographically monitored at 18 months and clinically followed up for 36 months after the procedure. Adverse effects were recorded based on occurrence and complexity. RESULTS A total of 33 patients were evaluated, 30 men (91%) and 3 women (9%) with an average age of 49.6 years (±8.4). Clinical improvement assessed by a dermatologist had an average score of 5.9 (±0.7) on a scale of 1-7. On color Doppler ultrasound there was a significant increase of the thickness of the subcutaneous tissue (SCT) in both nasofold lines when comparing before and after PAAG injection (P < 0.01) and no signs of inflammation (hypervascularity). User satisfaction was qualified as excellent or good in all cases. Only two patients experienced adverse effects (hematoma and puncture site infection), which was successfully managed without consequences. CONCLUSION Treatment of facial lipoatrophy with PAAG seems to be effective in HIV patients and no signs of complications were observed in the monitoring at 36 months after injection. Color Doppler ultrasound can identify the filler deposits and the anatomical changes of the SCT non-invasively.
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Diaz G, Suarez M, Quandt P, Gonzalez I, Vera E, Hernandez A. EPA-1557 - Neuroleptic malignant syndrome and atypical antipsychoticdrugs: a case report. Eur Psychiatry 2014. [DOI: 10.1016/s0924-9338(14)78718-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Lavaroni O, Vera E, Cabrera C, García N. Estudio serológico de brucelosis en alumnos de la Facultad de Ciencias Veterinarias de Esperanza en el año 2010. FAVE SECCIÓN CIENCIAS VETERINARIAS 2011. [DOI: 10.14409/favecv.v10i2.1535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Romero G, Sánchez P, García M, Cortina P, Vera E, Garrido JA. Randomized controlled trial comparing store-and-forward teledermatology alone and in combination with web-camera videoconferencing. Clin Exp Dermatol 2010; 35:311-7. [DOI: 10.1111/j.1365-2230.2009.03503.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Romero G, Cortina P, Vera E. [Telemedicine and teledermatology (II): current state of research on dermatology teleconsultations]. ACTAS DERMO-SIFILIOGRAFICAS 2008; 99:586-597. [PMID: 19080890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
The rapid increase in the use of telemedicine makes a critical appraisal of these services essential. This article reviews the current evidence from studies of teledermatology with sufficiently rigorous methodology to allow reasonable conclusions to be drawn. The review is organized according to areas of research in teledermatology: reliability of diagnosis and management, accuracy, outcomes, costs, and satisfaction. The conclusion of this review is that teledermatology has been shown to be feasible and reliable but that it has a long way to go before maturing as a medical technology in daily practice. The largest body of evidence relates to the reliability of diagnosis and management, but although numerous studies have been performed, many have marked methodological shortcomings. Accuracy studies have been conducted in skin oncology with appropriate methodology that show an accuracy comparable to that of face-to-face consultations. Studies of health outcomes should be designed such that a faithful assessment of the final outcomes, costs, and satisfaction with teledermatology systems can be carried out.
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Garrido S, Aviles M, Ramirez A, Calderon C, Ramirez-Orozco A, Nieto A, Shelp G, Seed L, Cebrian M, Vera E. Arsenic removal from water of Huautla, Morelos, Mexico using capacitive deionization. ARSENIC IN THE ENVIRONMENT 2008. [DOI: 10.1201/b11334-87] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Vera E, Canela A, Fraga MF, Esteller M, Blasco MA. Epigenetic regulation of telomeres in human cancer. Oncogene 2008; 27:6817-33. [PMID: 18762811 DOI: 10.1038/onc.2008.289] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Hypomethylation of repeated elements in the genome is a common feature of human cancer, however, the direct consequences of this epigenetic defect for cancer biology are still largely unknown. Telomeres are specialized chromatin structures at the ends of eukaryotic chromosomes formed by tandem repeats of G-rich sequences and associated proteins, which have an essential role in chromosome end protection and genomic stability. Telomeric DNA repeats cannot be methylated, however, the adjacent subtelomeric DNA is heavily methylated in humans. Here, we show that the methylation status of subtelomeric DNA repeats negatively correlates with telomere length and telomere recombination in a large panel of human cancer cell lines. These findings suggest that tumor telomere length and integrity can be influenced by epigenetic factors. Finally, we show that treatment of human cancer cell lines with demethylating drugs results in hypomethylation of subtelomeric repeats and increased telomere recombination, which in turn may facilitate telomere elongation. All together, these findings suggest that tumor telomere length and integrity can be influenced by the epigenetic status of cancer cells.
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Armstrong TS, Cao Y, Vera E, Scheurer ME, Manning R, Okcu MF, Bondy M, Gilbert MR. Pharmacoepidemiology of myelotoxicity (TOX) with temozolomide (TMZ) in malignant glioma patients. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.9548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Trabattoni E, Lavaroni O, Vera E, García N, Dalla Fontana M, Achkar G, Rossi A. Prevalencia de Anticuerpos Anti Toxoplasma Gondii y Trypanosoma Cruzi en Alumnos de Ciencias Veterinarias de la Universidad Nacional del Litoral, Esperanza, 2006. FAVE SECCIÓN CIENCIAS VETERINARIAS 2008. [DOI: 10.14409/favecv.v7i1/2.1473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Romero G, Cortina P, Vera E. Telemedicine and Teledermatology (II): Current State of Research on Dermatology Teleconsultations. ACTAS DERMO-SIFILIOGRAFICAS 2008. [DOI: 10.1016/s1578-2190(08)70326-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Romero G, García M, Vera E, Martínez C, Cortina P, Sánchez P, Guerra A. [Preliminary results of DERMATEL: prospective randomized study comparing synchronous and asynchronous modalities of teledermatology]. ACTAS DERMO-SIFILIOGRAFICAS 2007; 97:630-6. [PMID: 17173824 DOI: 10.1016/s0001-7310(06)73483-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
INTRODUCTION There is considerable variability in the results of studies that evaluate diagnostic reliability in teledermatology. There are only two studies that compare the synchronous and asynchronous modalities of teleconsult in the same sample. We present the results of the pilot project DERMATEL, a study of diagnostic concordance that aims to increase the evidence of these aspects. MATERIAL AND METHODS One-hundred-fifty.nine patients referred by the general practitioner in the first consult were randomized (algorithm 3:2:1) in three arms: asyncronous teledermatology (store-and-forward or SAF), synchronous teldermatology (real-time or VTC), and conventional consult (CC). We used high-quality, fixed digital images in all cases. The patients on the VTC teledermatology arm were also evaluated by videoconference. Finally all patients attended a face-to-face consult, considered the gold standard of patient care. A second dermatologist evaluated the diagnostic and management concordance between the teleconsults and the face-to-face consults. RESULTS One-hundred.forty-seven patients completed the study as follows: 74 in the SAF teledermatology arm, 47 in the VTC teledermatology arm and 26 in the conventional consult (control group). The teledermatological (SAF and VTC) and face-to-face evaluations were identical in 100 of 121 patients (82.6%). The errors were mild in 14 cases (11.6%) and severe in 7 (5.8%). The diagnostic concordance was very high (kappa=0,813). The errors grouped by diseases were as follows: 6/54 (11%) for tumors, 10/30 (33.3%) for inflammatory conditions, 1/20 (5%) for infectious diseases, 3/12 (25%) for alopecia/acne and 1/5 (20%) for others. There were 15 errors in the SAF teledermatology arm (20.3%) and 6 in the VTC teledermatology arm (12.8%); these differences were not statistically significant (chi2 1.12; p=0.288). CONCLUSION The reliability of dermatological teleconsult is very high, especially for tumoral or infectious diseases. The synchronous interaction with audio requires more resources, is difficult to coordinate and its diagnostic efficacy is not superior to SAF teledermatology.
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Trabattoni E, Lavaroni O, Delgado A, Vera E, García N. Estudio Seroepidemiológico de Brucelosis en Alumnos de Medicina Veterinaria en los Años 1996 y 1997. FAVE SECCIÓN CIENCIAS VETERINARIAS 2005. [DOI: 10.14409/favecv.v1i2.1370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Trabattoni E, Lavaroni O, Vera E, García N, Fusco S. Seroprevalencia de Leptospirosis en Estudiantes de la Facultad de Ciencias Veterinarias de Esperanza. FAVE SECCIÓN CIENCIAS VETERINARIAS 2005. [DOI: 10.14409/favecv.v4i1/2.1415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Trabattoni E, Lavaroni O, Vera E, García N. Prevalencia de Brucelosis en Alumnos y Docentes de Ciencias Veterinarias de Esperanza en el Año 2002. FAVE SECCIÓN CIENCIAS VETERINARIAS 2005. [DOI: 10.14409/favecv.v3i1/2.1402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Trabattoni E, Lavaroni O, Delgado A, Vera E, García N. Estudio Seroepidemiológico de Brucelosis en Alumnos de Medicina Veterinaria en los Años 1996 y 1997. FAVE SECCIÓN CIENCIAS VETERINARIAS 2005. [DOI: 10.14409/favecv.v1i1.1360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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García-del-Pozo J, Carvajal A, Grajal C, Vera E, del Pino A. Antimigraine drug consumption in Spain (1990-2000). Acta Neurol Scand 2003; 107:158-60. [PMID: 12580869 DOI: 10.1034/j.1600-0404.2003.02097.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: 11/23/2022]
Abstract
OBJECTIVES New marketed antimigraine drugs (triptans) are promising in the management of migraine pain. The impact of these new drugs on the overall consumption of the antimigraine drugs merits an analysis. MATERIAL AND METHODS The package units of antimigraine drugs, sold and reimbursed by the Spanish National Health System, are used for estimations. Data are presented as defined daily doses per 10,000 inhabitants/day. RESULTS During the 1990-2000 period, antimigraine drug utilization as a whole decreased by more than 25%; triptan use increased while ergot alkaloids' declined. CONCLUSIONS The pattern of antimigraine drug utilization in Spain has changed noticeably in accordance with recent recommendations.
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Harz C, Río JA, Quintana F, Vera E. [Common bilio pancreatic channel syndrome in adults]. Rev Med Chil 2001; 129:299-302. [PMID: 11372298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
BACKGROUND The Common Channel Syndrome (CCS) is defined as the union of the biliary and pancreatic ducts outside of the duodenal wall with a common duct more than 15 mm long. It is classified morphologically in types 1 and 2, whether it is the biliary or the pancreatic duct the one that predominates. CCS is uncommon in Western countries. It is described particularly in children and has not yet been reported in Chile. AIM To report the frequency of CCS among patients subjected to endoscopic retrograde cholangiopancreatography (ERCP). PATIENTS AND METHODS Between 1992 and 1998, 1860 ERCPs were performed for the diagnosis of biliary or pancreatic diseases. RESULTS In six patients (0.35%) a CCS was diagnosed (3 type 1 and 3 type 2). All patients presented with pain and three with jaundice. Four patients had a previous cholecystectomy, three due to cholelithiasis and one due to gallbladder cancer. A common bile duct resection and bilioenteric anastomosis was done in three patients with a favorable outcome. Two patients with an advanced age and one with a gallbladder cancer, were not operated. CONCLUSIONS CCS was found in 0.35% of patients subjected to an ERCP. It frequently presents in association with one or more bilio-pancreatic diseases: cholelithiasis, choledocolithiasis, cholangitis, pancreatitis and gallbladder cancer. Resection of the common bile duct and a bilio-enteric anastomosis is proposed as the surgical treatment.
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Pinto D, Ceballos JM, García G, Guzmán P, Del Razo LM, Vera E, Gómez H, García A, Gonsebatt ME. Increased cytogenetic damage in outdoor painters. Mutat Res 2000; 467:105-11. [PMID: 10838197 DOI: 10.1016/s1383-5718(00)00024-3] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Painters are exposed to an extensive variety of hazardous substances such as organic solvents, lead-containing pigments and residual plastic monomers. In this particular case, workers used commercially available exterior paints and occasionally gasoline or thinner as solvents. The application or removal of paints was performed without protection (masks or gloves). To determine occupational exposure risk, a monitoring study was designed. Group selection was made after a questionnaire administration, which included questions about lifestyle and medical history to exclude exposure to other potential sources of genotoxics. Smoking and drinking habits were also considered. Blood and buccal cell samples were obtained from 25 public building male painters and from a similar number of age- and gender-matched controls. Lead levels were measured in paint samples and in individuals' blood. Organic solvents and/or its metabolites were also determined in blood. Chromosomal aberrations (CA) and sister chromatid exchanges (SCE) were determined in peripheral blood lymphocyte cultures. Also, the frequency of micronuclei (MN) in buccal cells was investigated. Painters had higher lead levels in blood (p<0.05); CA and SCE in lymphocytes and MN in epithelial cells were also elevated (p<0.05). Cytogenetic damage was significantly associated with occupational exposure time but not with the levels of lead found in blood.
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Yuen VG, Vera E, Battell ML, Li WM, McNeill JH. Acute and chronic oral administration of bis(maltolato)oxovanadium(IV) in Zucker diabetic fatty (ZDF) rats. Diabetes Res Clin Pract 1999; 43:9-19. [PMID: 10199584 DOI: 10.1016/s0168-8227(98)00120-x] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
This is a preliminary study in which both acute and chronic oral administration of bis(maltolato)oxovanadium (IV) (BMOV) was examined in the Zucker diabetic fatty (ZDF) rat, an animal model that develops overt hyperglycemia in the presence of hyperinsulinemia followed by beta-cell depletion. At 9-10 weeks of age, in the presence of hyperglycemia, hyperinsulinemia and hyperlipidemia, an acute oral gavage dose response was conducted to determine glucose-lowering properties of BMOV, time of response and effect of BMOV on plasma insulin levels. Doses of BMOV greater than 0.2 mmol/kg resulted in plasma glucose levels of less than 9 mmol/l. The highest dose administered (0.8 mmol/kg) significantly reduced plasma insulin (initial: 2.83+/-0.2, final: 1.23+/-0.09 nmol/l, P<0.05) and plasma triglyceride (initial: 4.94+/-0.33, final: 1.55+/-0.07 mmol/l, P<0.05) levels. At 15 weeks of age, in the presence of hyperglycemia, hyperlipidemia and normal insulin levels, BMOV was administered orally in the drinking water for a 10-week period to determine the effect of treatment on glucose, insulin and lipid levels. BMOV treatment significantly reduced plasma glucose levels (final BMOV-treated: 13.25+/-1.43, untreated: 28.71+/-0.6 mmol/l, P<0.05) and effectively preserved pancreatic beta-cell function. These data suggest a role for BMOV as a therapeutic agent in non-insulin-dependent diabetes mellitus through improvement in glucose homeostasis and preservation of insulin reserves.
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