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Bustamante F, Alves N, Torres C, Gatica C, Olave E. Determinación del Índice Facial Total y Cono Facial en Individuos Chilenos. INT J MORPHOL 2016. [DOI: 10.4067/s0717-95022016000300025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Rydland J, BjØrnerud A, Haugen O, Torheim G, Torres C, Kvistad KA, Haraldseth O. New intravascular contrast agent applied to dynamic contrast enhanced MR imaging of human breast cancer. Acta Radiol 2016; 44:275-83. [PMID: 12751998 DOI: 10.1080/j.1600-0455.2003.00068.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Purpose: To evaluate the feasibility of using dynamic contrast-enhanced MR imaging with a new intravascular contrast agent in grading human breast cancer. Material and Methods: 23 patients with 27 breast tumors (21 carcinomas and 6 fibroadenomas) were examined with dynamic MR imaging after administration of Clariscan, an iron oxide nanoparticle with large T1 relaxivity and a long plasma half life. A 3D T1-weighted gradient echo sequence with an acquisition time of 60 s was repeated at regular intervals of 3–5 min before and up to 1 h after injection of 2 mg/kg b.w. of Clariscan. The endothelial transfer constant, Kps, which reflects overall vascular permeability, and the fractional plasma volume, fPV, were estimated from time-intensity curves acquired from three separate regions of interest (ROIs): whole tumor, a permeability hot spot, and a blood volume hot spot. Kps and fPV were compared to the results of histologic tumor grading (Scarff-Bloom-Richardson, SBR) and microvascular density, MVD. Results: A statistically significant correlation between the MR-derived Kps parameters and the SBR score was obtained for the whole tumor ROI ( R = 0.70), and for the permeability hot spot ROIs ( R = 0.67). A correlation between fPV and SBR was detected for the blood volume hot spot ROIs ( R = 0.48). There was no statistically significant correlation between Kps or fPV with MVD. Conclusion: The results support the hypothesis that dynamic MR with the intravascular contrast agent Clariscan may be used for non-invasive tumor grading.
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McMillan HJ, Torres C, Michaud J, Ying Y, Boyd KU, Bourque PR. Diagnosis and outcome of childhood perineurioma. Childs Nerv Syst 2016; 32:1555-60. [PMID: 27086131 DOI: 10.1007/s00381-016-3089-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Accepted: 04/13/2016] [Indexed: 10/21/2022]
Abstract
INTRODUCTION Intraneural perineurioma is a rare peripheral nerve tumor of childhood and early adulthood. Patients demonstrate progressive muscle weakness and atrophy largely without sensory complaints. CASE We report two children with perineurioma affecting the radial and femoral nerves. Electromyography (EMG), ultrasound, and 3-T MR imaging were important tools for localizing perineurioma and permitting its differentiation from other nerve lesions. The first patient underwent surgical excision of the perineurioma and a traditional nerve graft. At 10 months post-operative follow-up, she demonstrated no meaningful recovery of muscle strength compared to her pre-operative assessment. EMG did confirm axonal continuity indicating that reinnervation had occurred via the nerve graft. The second patient underwent a two-staged surgical procedure that included an end-to-side nerve transfer. At 18 months post-operative follow-up, she demonstrated mild improvement in muscle strength and EMG evidence of ongoing reinnervation. CONCLUSION The surgical management of perineurioma remains controversial, and reports of clinical recovery after nerve grafts and nerve transfers vary. Nerve transfers have been reported to provide superior results to traditional nerve grafting in adults with post-traumatic plexus injuries. The modest gain in strength of our patient who underwent a nerve transfer raises the question if this may also apply to patients with perineurioma. Additional studies will be required, which must also take into consideration that features of long-standing neuropathy (i.e., limb length discrepancy) have the potential to reduce the likelihood of reinnervation and clinical recovery.
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Fung A, Li C, Torres C. TH-AB-202-07: Radar Tracking of Respiratory Motion in Real Time. Med Phys 2016. [DOI: 10.1118/1.4958071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Alonso C, González-Barrio D, Tenorio C, Ruiz-Fons F, Torres C. Antimicrobial resistance in faecal Escherichia coli isolates from farmed red deer and wild small mammals. Detection of a multiresistant E. coli producing extended-spectrum beta-lactamase. Comp Immunol Microbiol Infect Dis 2016; 45:34-9. [DOI: 10.1016/j.cimid.2016.02.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 01/28/2016] [Accepted: 02/10/2016] [Indexed: 11/17/2022]
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Arias F, Eito C, Asín G, Mora I, Cambra K, Mañeru F, Ibáñez B, Arbea L, Errasti M, Barrado M, Campo M, Visus I, García-Escobedo J, Torres C, Ciga M. EP-1288: Sphincter function and dose of radiation in rectal cancer. A Single-Institutional study. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32538-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Maciel-Barón LA, Morales-Rosales SL, Aquino-Cruz AA, Triana-Martínez F, Galván-Arzate S, Luna-López A, González-Puertos VY, López-Díazguerrero NE, Torres C, Königsberg M. Senescence associated secretory phenotype profile from primary lung mice fibroblasts depends on the senescence induction stimuli. AGE (DORDRECHT, NETHERLANDS) 2016; 38:26. [PMID: 26867806 PMCID: PMC5005892 DOI: 10.1007/s11357-016-9886-1] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 01/28/2016] [Indexed: 05/17/2023]
Abstract
Cellular senescence is a multifactorial phenomenon of growth arrest and distorted function, which has been recognized as an important feature during tumor suppression mechanisms and a contributor to aging. Senescent cells have an altered secretion pattern called Senescence-Associated Secretory Phenotype (SASP) that comprises a complex mix of factors including cytokines, growth factors, chemokines, and matrix metalloproteinases. SASP has been related with local inflammation that leads to cellular transformation and neurodegenerative diseases. Various pathways for senescence induction have been proposed; the most studied is replicative senescence due to telomere attrition called replicative senescence (RS). However, senescence can be prematurely achieved when cells are exposed to diverse stimuli such as oxidative stress (stress-induced premature senescence, SIPS) or proteasome inhibition (proteasome inhibition-induced premature senescence, PIIPS). SASP has been characterized in RS and SIPS but not in PIIPS. Hence, our aim was to determine SASP components in primary lung fibroblasts obtained from CD-1 mice induced to senescence by PIIPS and compare them to RS and SIPS. Our results showed important variations in the 62 cytokines analyzed, while SIPS and RS showed an increase in the secretion of most cytokines, and in PIIPS only 13 were incremented. Variations in glutathione-redox balance were also observed in SIPS and RS, and not in PIIPS. All senescence types SASP displayed a pro-inflammatory profile and increased proliferation in L929 mice fibroblasts exposed to SASP. However, the behavior observed was not exactly the same, suggesting that the senescence induction pathway might encompass dissimilar responses in adjacent cells and promote different outcomes.
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Jaureguiberry A, Ibarra V, Moretta G, Torres C, Ceruzzi R, Rodriguez-Perez S, Reich E. Adult-onset opsoclonus-myoclonus-ataxia syndrome: clinical features and diagnostic findings. J Neurol Sci 2015. [DOI: 10.1016/j.jns.2015.08.694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Reich E, Arias E, Torres C, Halac E, Carlino M. Anosognosia and self awareness in multiple sclerosis. J Neurol Sci 2015. [DOI: 10.1016/j.jns.2015.08.1111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Berlana D, Almendral M, Abad M, Fernández A, Torralba A, Cervera M, Piñeiro G, Romero R, Vázquez A, Ramírez E, Marced-Barrachina E, Muñoz A, Torres C. SUN-PP015: Economic Assessment in the Preparation Process of Parenteral Nutrition: Manual Compounded Bags Versus Tricompartimental Bags. Nutripar Study. Clin Nutr 2015. [DOI: 10.1016/s0261-5614(15)30166-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Rocha-Gracia R, Cortés-Cortés G, Lozano-Zarain P, Bello F, Martínez-Laguna Y, Torres C. Faecal Escherichia coli isolates from healthy dogs harbour CTX-M-15 and CMY-2 β-lactamases. Vet J 2015; 203:315-9. [DOI: 10.1016/j.tvjl.2014.12.026] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 11/27/2014] [Accepted: 12/24/2014] [Indexed: 10/24/2022]
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Börjesson S, Gómez-Sanz E, Ekström K, Torres C, Grönlund U. Staphylococcus pseudintermedius can be misdiagnosed as Staphylococcus aureus in humans with dog bite wounds. Eur J Clin Microbiol Infect Dis 2014; 34:839-44. [PMID: 25532507 DOI: 10.1007/s10096-014-2300-y] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 12/07/2014] [Indexed: 11/25/2022]
Abstract
The purpose of this study was to investigate whether S. pseudintermedius is misdiagnosed as S. aureus by clinical laboratories when isolated from humans with dog bite wounds. In addition, we attempted to determine whether S. pseudintermedius isolates related to dog bite wounds share phenotypic and genotypic traits. S. pseudintermedius was identified by PCR targeting the nuc gene. Isolates were tested for antibiotic susceptibility using VetMIC GP-mo microdilution panels. The occurrence of genes encoding leukocidins, exfoliatins, pyrogenic toxin superantigens and enterotoxins was determined by PCR. The relatedness of S. pseudintermedius isolates was investigated using Multi Locus Sequence Typing (MLST). Out of 101 isolates defined as S. aureus by human clinical microbiology laboratories, 13 isolates were re-identified as S. pseudintermedius and one isolate was confirmed to carry the mecA gene, i.e. methicillin-resistant (MRSP). The MRSP isolate was also defined as multi-resistant. Two methicillin-susceptible S. pseudintermedius isolates were also multi-resistant and five were susceptible to all antibiotics tested. With the exception of three S. pseudintermedius isolates belonging to multi locus sequence type (MLST) 158, all the isolates belonged to unique STs. All isolates contained lukS/F-I, siet and se-int, and expA were identified in two isolates and expB and sec canine-sel in one isolate respectively. S. pseudintermedius is frequently misdiagnosed as S. aureus from humans with dog bite wounds showing that it can act as an opportunistic pathogen in humans. No common phenotypic and genotypic traits shared by the S. pseudintermedius isolates could be identified.
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Silva N, Guimarães F, Manzi M, Júnior AF, Gómez-Sanz E, Gómez P, Langoni H, Rall V, Torres C. Methicillin-resistant Staphylococcus aureus
of lineage ST398 as cause of mastitis in cows. Lett Appl Microbiol 2014; 59:665-9. [DOI: 10.1111/lam.12329] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 09/17/2014] [Accepted: 09/17/2014] [Indexed: 11/27/2022]
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Irarrázaval ME, Rodríguez PF, Fasce G, Silva FW, Waintrub H, Torres C, Barriga C, Fritis M, Marín L. [Validation of BR23 questionnaire for the assessment of quality of life of breast cancer patients in Chile]. Rev Med Chil 2014; 141:723-34. [PMID: 24121575 DOI: 10.4067/s0034-98872013000600006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Accepted: 01/16/2013] [Indexed: 11/17/2022]
Abstract
BACKGROUND Quality of Life assessment in oncologic patients evaluates the impact and sequels of the disease ana the adverse effects of available treatments. AIM To validate in Chile the breast cancer specific-questionnaire (BR23) developed by the European Organization for Research and Treatment of Cancer (EORTC). PATIENTS AND METHODS After performing a linguistic validation of the BR23 according to EORTC instructions, its psychometric properties were tested in 103 patients with breast cancer whose ages ranged from 34 to 83 years. Internal consistency of the scales was assessed using the Cronbach's alpha coefficient. The test-retest correlations of each scale (n = 83) were evaluated. The correlation of BR23 scales with SF36 version 2 and C30 version 3.0 scales was also assessed. The sensitivity and specificity of the instrument were analyzed using receiver operating characteristic curves (ROC). RESULTS Alpha values showed acceptable levels of internal consistency, ranging between 0.702 and 0.917 in all scales of BR23. The statistical analysis revealed significant test-retest correlations in most scales of BR23. The correlations between BR23 and similar domains of C30 and SF36 questionnaires were also significant. The BR23 questionnaire demonstrated satisfactory levels of sensitivity and specificity when compared with the SF-36 scale. CONCLUSIONS The BR23 questionnaire adapted for use in Chile is linguistically appropriate and psychometrically valid.
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Gharsa H, Slama KB, Gómez-Sanz E, Gómez P, Klibi N, Zarazaga M, Boudabous A, Torres C. Characterisation of nasal Staphylococcus delphini and Staphylococcus pseudintermedius isolates from healthy donkeys in Tunisia. Equine Vet J 2014; 47:463-6. [PMID: 24913693 DOI: 10.1111/evj.12305] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Accepted: 06/01/2014] [Indexed: 01/21/2023]
Abstract
REASONS FOR PERFORMING STUDY Staphylococcus intermedius group (SIG) bacteria can colonise the nares of some animals but are also emerging pathogens in humans and animals. OBJECTIVES To analyse SIG nasal carriage in healthy donkeys destined for food consumption in Tunisia and to characterise recovered isolates. METHODS Nasal swabs from 100 healthy donkeys were tested for SIG recovery, and isolates were identified by biochemical and molecular methods. Antimicrobial susceptibility of isolates was tested and detection of antimicrobial resistance and virulence genes was performed. Isolates were typed at the clonal level by multilocus sequence typing and SmaI pulsed-field gel electrophoresis. RESULTS Staphylococcus delphini and Staphylococcus pseudintermedius (included in SIG) were obtained in 19% and 2% of the tested samples, respectively, and one isolate per sample was characterised. All isolates were meticillin susceptible and mecA negative. Most S. delphini and S. pseudintermedius isolates showed susceptibility to all antimicrobials tested, with the exception of 2 isolates resistant to tetracycline (tet(M) gene) or fusidic acid. The following toxin genes were identified (percentage of isolates): lukS-I (100%), lukF-I (9.5%), siet (100%), se-int (90%), seccanine (19%) and expA (9.5%). Thirteen different pulsed-field gel electrophoresis profiles were identified among the 21 SIG isolates. Additionally, the following 9 different sequence types (STs) were detected by multilocus sequence typing, 6 of them new: ST219 (6 isolates), ST12 (5 isolates), ST220 (3 isolates), ST13, ST50, ST193, ST196, ST218 and ST221 (one isolate each). CONCLUSIONS Staphylococcus delphini and S. pseudintermedius are common nasal colonisers of donkeys, generally susceptible to the antimicrobials tested; nevertheless, these SIG isolates contain virulence genes, including the recently described exfoliative gene (expA) and several enterotoxin genes, with potential implications for public health. This is the first description of S. delphini in Tunisia. The Summary is available in Chinese - see Supporting information.
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Horsley E, Just E, Torres C, Huhtinen E, Forssman B, Slade R. Enterovirus 71 outbreak in Northern Sydney, 2013: case series and initial response. J Paediatr Child Health 2014; 50:525-30. [PMID: 25041293 DOI: 10.1111/jpc.12625] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/01/2014] [Indexed: 11/28/2022]
Abstract
AIM Enteroviruses are a common cause of childhood disease which may manifest in a variety of ways. Enterovirus 71 (EV71) is a subtype of enterovirus which can cause meningoencephalomyelitis resulting in neurological sequelae including lethargy, weakness, ataxia, sleep myoclonus, urinary retention and, in severe cases, cardiorespiratory collapse due to neurogenic pulmonary oedema. EV71 was responsible for outbreaks in South East Asia in 1997-1998, in Western Australia in 1999 and in Sydney in 2000-2001. In 2013, we are experiencing another EV71 outbreak in Sydney. This study describes the discovery of a new outbreak in Sydney's Northern Beaches, the clinical findings as well as the public health response. METHODS Thirty-seven children in total presented with presumed EV71 to the Northern Beaches Health Service from December 2012 to April 2013. Most children presented with a prodrome lasting 2-7 days prior to seeking medical attention. Sleep myoclonus was a common presenting sign occurring in 65%. Neurological signs were subtle in the majority of children and were at times missed by clinicians on a child's first presentation. Forty-six per cent of children who presented to Northern Beaches Health Service during this outbreak required a transfer to a tertiary paediatric centre for more intensive care. RESULTS The public health investigation was important in establishing that the disease was widespread throughout the community and not as a result to exposure to a single child care setting. Identification of risk factors enabled more targeted communication to medical practitioners, child care centres and parents within the local community. CONCLUSIONS EV71 is in Australia and all clinicians seeing children in primary, secondary and tertiary care centres need to be aware of the disease, the subtle nature of initial symptoms and the potentially devastating consequences.
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Bragatti J, Torres C, Cherubini P, Segal S, Bianchin M. P789: Interictal EEG activity is associated with mood disorders in temporal lobe epilepsy. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50828-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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de Andrés-Nogales F, Morell A, Aracil J, Torres C, Oyagüez I, Casado MA. [Cost analysis of the use of botulinum toxin type A in Spain]. FARMACIA HOSPITALARIA : ORGANO OFICIAL DE EXPRESION CIENTIFICA DE LA SOCIEDAD ESPANOLA DE FARMACIA HOSPITALARIA 2014; 38:193-201. [PMID: 24951903 DOI: 10.7399/fh.2014.38.3.1163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To estimate treatment costs of blepharospasm, cervical dystonia(CD), upper limb spasticity (ULS) and spasticity in children with cerebral palsy (SCCP) with botulinum neurotoxin type A (BoNT-A) in Spain. METHOD Annual BoNT-A treatment costs were calculated (2013 ex-factory price () applying RDL 8/2010 and RDL 9/2011 deductions), based on initial dose (id), average dose (ad) and maximum dose (md) according to Summary of Product Characteristics of Botox® (100U/50U), Dysport®(500U) and Xeomin® (100U) and considering the use of complete vials.In addition, annual treatment costs were calculated considering the useof vials in more than one patient and also patient population annual treatment costs based on diseases' prevalence. RESULTS Annual BoNT-A treatment costs per patient were estimated at between 265 and 2,120 with savings from 10% to 55% accordingto the selected BoNT-A. CD and ULS treatment provided the greatest cost per patient. Botox® provided greater savings in ULS (id/ad), CD(id), and in blepharospasm and SCCP (id/ad/md). Dysport® treatment was less costly in CD (md) and ULS (md), while Xeomin® was in CD(ad). Based on the estimated treated population in Spain, the annual treatment costs ranged from 368,392 to 13,958,836 depending on indication, dose and BoNT-A considered. CONCLUSIONS The appropriate BoNT-A choice would lead to considerable savings for the National Health System. Botox® would generate lower costs per patient than other BoNT-A products in 9 out of 12 scenarios considered.
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Gomez-Lobo V, Whyte T, Kaufman S, Torres C, Moudgil A. Immunogenicity of a prophylactic quadrivalent human papillomavirus L1 virus-like particle vaccine in male and female adolescent transplant recipients. Pediatr Transplant 2014; 18:310-5. [PMID: 24484551 DOI: 10.1111/petr.12226] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/13/2013] [Indexed: 12/18/2022]
Abstract
Organ TX recipients are at an increased risk of developing cancers of the lower genital tract related to HPV. The quadrivalent HPV vaccine has high efficacy in preventing these diseases, but response to many vaccines is suboptimal after organ transplantation. Liver and kidney TX recipients received quadrivalent HPV vaccine. Serum samples were tested for anti-HPV levels. Of 20 renal transplant recipients screened, 14 received vaccine. Of these, seven completed the vaccine series and seven had incomplete vaccination. Of five liver TX children, three received vaccines (two complete and one incomplete). All eight kidney and liver TX children with complete vaccination and available results were seronegative at baseline and had seroconversion at month 7 for all four HPV types. Six of 14 (42.8%) kidney TX recipients developed AR. During the same time period, eight of 28 (28.5%) non-vaccine renal transplant recipients developed AR (p = ns). Transplant adolescents developed 100% seroconversion to all four HPV serotypes with HPV vaccine with serologic titers similar to historic controls. A non-significant increased incidence of AR was noted among kidney transplant vaccine recipients. A much larger study would be needed to evaluate whether HPV vaccination increases AR in transplant adolescents.
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Torres C, Lema C, Dohmen FG, Beltran F, Novaro L, Russo S, Freire MC, Velasco-Villa A, Mbayed VA, Cisterna DM. Phylodynamics of vampire bat-transmitted rabies in Argentina. Mol Ecol 2014; 23:2340-2352. [PMID: 24661865 PMCID: PMC4870601 DOI: 10.1111/mec.12728] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 03/06/2014] [Accepted: 03/14/2014] [Indexed: 12/11/2022]
Abstract
Common vampire bat populations distributed from Mexico to Argentina are important rabies reservoir hosts in Latin America. The aim of this work was to analyse the population structure of the rabies virus (RABV) variants associated with vampire bats in the Americas and to study their phylodynamic pattern within Argentina. The phylogenetic analysis based on all available vampire bat-related N gene sequences showed both a geographical and a temporal structure. The two largest groups of RABV variants from Argentina were isolated from northwestern Argentina and from the central western zone of northeastern Argentina, corresponding to livestock areas with different climatic, topographic and biogeographical conditions, which determined their dissemination and evolutionary patterns. In addition, multiple introductions of the infection into Argentina, possibly from Brazil, were detected. The phylodynamic analysis suggests that RABV transmission dynamics is characterized by initial epizootic waves followed by local enzootic cycles with variable persistence. Anthropogenic interventions in the ecosystem should be assessed taking into account not only the environmental impact but also the potential risk of disease spreading through dissemination of current RABV lineages or the emergence of novel ones associated with vampire bats.
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Gonçalves A, Poeta P, Monteiro R, Marinho C, Silva N, Guerra A, Petrucci-Fonseca F, Rodrigues J, Torres C, Vitorino R, Domingues P, Igrejas G. Comparative proteomics of an extended spectrum β-lactamase producing Escherichia coli strain from the Iberian wolf. J Proteomics 2014; 104:80-93. [PMID: 24631823 DOI: 10.1016/j.jprot.2014.02.033] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 02/15/2014] [Accepted: 02/25/2014] [Indexed: 12/13/2022]
Abstract
UNLABELLED The Iberian wolf (Canis lupus signatus) is an endangered species native to the Iberian Peninsula. Due to their predatory and wild nature, these wolves serve as important indicators of environmental contamination by antimicrobial-resistant bacteria. β-Lactam antibiotics like cefotaxime are the most commonly used antibacterial agents. Bacterial resistance to these antibiotics occurs predominantly through enzymatic inactivation by extended-spectrum beta-lactamases. Escherichia coli strain WA57, isolated from Iberian wolf feces, is a cefotaxime-resistant strain that produces extended-spectrum beta-lactamases. In this study, using 2D-GE combined with MS and bioinformatics, we report significant differences in the abundance of 40 protein spots (p<0.01) from the extracellular, periplasmic, cytoplasmic, and membrane sub-proteomes and the whole-cell proteome of WA57 exposed and non-exposed to cefotaxime. A total of 315 protein spots were collected for protein identification. The comparative proteomics presented gives an overview of the complex changes in expression and metabolism that occur when WA57 is stressed with cefotaxime. Abundance of chaperone, porin and export proteins is particularly affected showing that the stress response and transport functions might directly influence the antibiotic resistance of this strain. BIOLOGICAL SIGNIFICANCE This study highlights the importance of proteomics in detecting protein expression changes in bacterial strains exposed to stress such as that caused by cefotaxime. This approach might help us understand which pathways form barriers for antibiotics. This article is part of a Special Issue entitled: Environmental and structural proteomics.
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Delli Fraine P, Bessissow A, Yoon J, Aris F, Torres C, Cabrera T, Boucher L, Hennessey H, Dey C, Valenti D. Positional changes of retrievable inferior vena cava (IVC) filters at the time of removal: a comparative study of different filter types. J Vasc Interv Radiol 2014. [DOI: 10.1016/j.jvir.2013.12.367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Moreno-Indias I, Hernández-Castellano L, Torres C, Morales-delaNuez A, Sánchez-Macías D, Castro N, Argüello A. Use of microseaweeds (Chlorella pyrenoidosa) as a probiotic in dairy goats feeding. JOURNAL OF APPLIED ANIMAL RESEARCH 2014. [DOI: 10.1080/09712119.2013.848535] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Porres-Osante N, Dupont H, Torres C, Ammenouche N, de Champs C, Mammeri H. Avibactam activity against extended-spectrum AmpC -lactamases. J Antimicrob Chemother 2014; 69:1715-6. [DOI: 10.1093/jac/dku002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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