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Gómez-Ramírez P, Bustnes JO, Eulaers I, Johnsen TV, Lepoint G, Pérez-García JM, García-Fernández AJ, Espín S, Jaspers VLB. Mercury Exposure in Birds of Prey from Norway: Relation to Stable Carbon and Nitrogen Isotope Signatures in Body Feathers. Bull Environ Contam Toxicol 2023; 110:100. [PMID: 37266735 DOI: 10.1007/s00128-023-03740-6] [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] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 05/15/2023] [Indexed: 06/03/2023]
Abstract
Mercury (Hg) and stable carbon and nitrogen isotope ratios were analysed in body feathers from nestlings of white-tailed eagles (Haliaeetus albicilla) (WTE; n = 13) and Northern goshawks (Accipiter gentilis) (NG; n = 8) and in red blood cells (RBC) from NG (n = 11) from Norway. According to linear mixed model, species factor was significant in explaining the Hg concentration in feathers (LMM; p < 0.001, estimate (WTE) = 2.51, 95% CI = 1.26, 3.76), with concentrations higher in WTE (3.01 ± 1.34 µg g-1 dry weight) than in NG (0.51 ± 0.34 µg g-1 dry weight). This difference and the isotopic patterns for each species, likely reflect their diet, as WTE predominantly feed on a marine and higher trophic-chain diet compared to the terrestrial NG. In addition, Hg concentrations in RBCs of NG nestlings were positively correlated with feather Hg concentrations (Rho = 0.77, p = 0.03), supporting the potential usefulness of nestling body feathers to biomonitor and estimate Hg exposure. Hg levels in both species were generally below the commonly applied toxicity threshold of 5 µg g-1 in feathers, although exceeded in two WTE (6.08 and 5.19 µg g-1 dry weight).
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Affiliation(s)
- Pilar Gómez-Ramírez
- Toxicology Group, Department of Health Sciences, Faculty of Veterinary, University of Murcia, Campus de Espinardo, 30100, Murcia, Spain.
| | - Jan Ove Bustnes
- Norwegian Institute for Nature Research, Fram Centre, 9296, Tromsø, Norway
| | - Igor Eulaers
- Department of Bioscience, Faculty of Technical Sciences, Aarhus University, Frederiksborgvej 399, PO Box 358, 4000, Roskilde, Denmark
| | | | - Giles Lepoint
- Laboratory of Oceanology, UR FOCUS, University of Liège, 4000, Liège, Belgium
| | | | - Antonio Juan García-Fernández
- Toxicology Group, Department of Health Sciences, Faculty of Veterinary, University of Murcia, Campus de Espinardo, 30100, Murcia, Spain
| | - Silvia Espín
- Toxicology Group, Department of Health Sciences, Faculty of Veterinary, University of Murcia, Campus de Espinardo, 30100, Murcia, Spain
| | - Veerle Leontina Bernard Jaspers
- Environmental Toxicology Group, Department of Biology, Norwegian University of Science and Technology (NTNU), 7024, Trondheim, Norway.
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Guil F, Pérez-García JM. Bird electrocution on power lines: Spatial gaps and identification of driving factors at global scales. J Environ Manage 2022; 301:113890. [PMID: 34624576 DOI: 10.1016/j.jenvman.2021.113890] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
Universal energy access is one of the targets of the Sustainable Development Goals (SDGs), and thus the deployment of electricity grids is expected to expand globally in the coming decades. However, the installation of power lines is not biodiversity-friendly. In particular, electrocution on power pylons is a major cause of bird mortality worldwide, including for some severely endangered species. Over the last decades, different studies have improved our understanding of the factors influencing the risk of electrocution in birds, but until now spatial gaps in our knowledge of these impacts and the factors driving global patterns of bird electrocution have not been assessed. In this study, we evaluated data from a total of 114 studies that provided information on bird mortality rates on power lines, and we analyzed the factors driving electrocution rates for all bird species, and then for all raptors and large eagles separately. Our results showed a high spatial distribution bias, as more than 80% of the studies were carried out in developed countries, mostly in Europe and North America. By contrast, no systematic studies have been found for Oceania and very few for South America and Africa. Europe showed the highest electrocution rates for birds, South America for raptor species and Africa for eagles. Socio-economic factors best-explained bird and raptor electrocution rates, while climate-related factors were the most influential for eagles. Contrary to our expectations, factors related to pylon design were the least influential on overall electrocution rates. Variables related to study design showed highly variable levels of influence. This could be due to the lack of standardized protocols. Although bird electrocution has been extensively studied, there are large areas where no studies have been carried out or for which data are inaccessible. This could be because in these areas the power distribution network is still sparse, or that most studies are not public or accessible to the international community. Researchers and managers should promote the publication of studies, as awareness is the first step to solving these problems. The factors identified could be applied globally to the design and planning of power grids and the identification of mortality hotspots. This would help mitigate the creation of new mortality hotspots, especially in developing countries where the installation of new power lines has been growing exponentially in recent years.
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Affiliation(s)
- Francisco Guil
- Biodiversity, Forests and Desertification General Directorate, Spanish Ministry of Ecological Transition and the Demographic Challenge, Plaza San Juan de la Cruz, S/N, 28071, Madrid, Spain
| | - Juan Manuel Pérez-García
- Ecology Area, Department of Applied Biology, Centro de Investigación e Innovación Agroalimentaria y Agroambiental CIAGRO-UMH, Universidad Miguel Hernández, Avda. de la Universidad, s/n, 03202, Elche, Spain.
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López-Berenguer G, Pérez-García JM, García-Fernández AJ, Martínez-López E. High Levels of Heavy Metals detected in Feathers of an Avian Scavenger Warn of a High Pollution Risk in the Atacama Desert (Chile). Arch Environ Contam Toxicol 2021; 81:227-235. [PMID: 34100967 DOI: 10.1007/s00244-021-00862-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Accepted: 05/29/2021] [Indexed: 06/12/2023]
Abstract
The Atacama Desert represents the highest levels of mining exploitation in Chile, which inexorably results in high levels of pollution. Raptors, and particularly scavengers, have shown their usefulness to evaluate exposure to environmental contaminants in polluted scenarios. In this study, we used primary feathers from a local avian scavenger, turkey vulture Cathartes aura, to evaluate the exposure to cadmium (Cd), lead (Pb), copper (Cu) and zinc (Zn) in two locations from the southern Atacama Desert (coastal and inland) and a third location from the bordering semiarid region, in northern Chile. All metals were detected in all analyzed samples (n = 54). Mean concentrations in Coastal Atacama were 0.68 ± 0.84 ppm for Cd; 1.97 ± 2.01 ppm for Pb; 59.11 ± 80.69 ppm for Cu; and 107.96 ± 51.00 ppm for Zn, while mean concentrations in Inland Atacama were 0.55 ± 0.42 ppm for Cd; 3.37 ± 2.61 ppm for Pb; 91.66 ± 77.74 ppm for Cu; and 214.03 ± 99.08 ppm for Zn. Mean concentrations in Coastal Coquimbo were 0.63 ± 0.69 ppm for Cd; 1.57 ± 0.92 ppm for Pb; 18.09 ± 6.12 ppm for Cu; and 149.37 ± 105.56 ppm for Zn. These differences could be explained by differences on abundance of mining settlements among areas. According to the literature, these values are very high for all metals, exceeding in some cases those values referred as responsible of health disorders in birds. We strongly recommend further research looking at potential adverse effects caused by heavy metal pollution on the health of human and wildlife populations in the southern Atacama Desert.
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Affiliation(s)
- G López-Berenguer
- Area of Toxicology, Department of Health Sciences, Faculty of Veterinary Medicine, University of Murcia, 30100, Murcia, Spain
| | - J M Pérez-García
- Ecology Area, Department of Applied Biology, University Miguel Hernández, 03202, Elche, Spain
- Department of Animal Sciences, Faculty of Life Sciences and Engineering, University of Lleida, 25198, Lleida, Spain
| | - A J García-Fernández
- Area of Toxicology, Department of Health Sciences, Faculty of Veterinary Medicine, University of Murcia, 30100, Murcia, Spain
- Toxicology and Risk Assessment Group, Biomedical Research Institute of Murcia (IMIB-Arrixaca), University of Murcia, 30100, Murcia, Spain
| | - E Martínez-López
- Area of Toxicology, Department of Health Sciences, Faculty of Veterinary Medicine, University of Murcia, 30100, Murcia, Spain.
- Toxicology and Risk Assessment Group, Biomedical Research Institute of Murcia (IMIB-Arrixaca), University of Murcia, 30100, Murcia, Spain.
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Gómez-Ramírez P, Pérez-García JM, León-Ortega M, Martínez JE, Calvo JF, Sánchez-Zapata JA, Botella F, María-Mojica P, Martínez-López E, García-Fernández AJ. Spatiotemporal variations of organochlorine pesticides in an apex predator: Influence of government regulations and farming practices. Environ Res 2019; 176:108543. [PMID: 31260915 DOI: 10.1016/j.envres.2019.108543] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 05/16/2019] [Accepted: 06/17/2019] [Indexed: 05/15/2023]
Abstract
BACKGROUND Intensification of agricultural practices has caused several negative effects to the environment. The use of fertilizers and pesticides may alter geochemical cycles or cause direct wildlife intoxication. Detrimental effects of organochlorine pesticides (OCPs) have forced the authorities to ban or restrict its use. This study evaluates the variation in levels of OCPs in a sentinel species in relation to changes in government regulations and the spatial configuration of agricultural practices around the nests. METHODS Between 2003 and 2007, we analysed OCP levels in 256 blood samples of Eurasian Eagle-owl (Bubo bubo) chicks nesting in area of intensive commercial agriculture with historical frequent use of pesticides, in South-eastern Spain. We studied year-to-year variations in OCP concentrations and their relation with land use configuration around raptor nests by Generalized Linear Mixed Models (GLMM). RESULTS OCPs were detected in 100% samples surveyed in 2003 and 2004, while dropped to 27% in 2005, 6.8% in 2006 and 6.3% in 2007, coinciding with the ban of OCPs. The presence of the main OCPs was related to agricultural practices. In particular, endosulfan and lindane were related to irrigated crops and urban areas, while DDT-related compounds and dieldrin were associated with dry land farming. CONCLUSIONS OCP concentrations in blood samples of Eurasian Eagle-owls may respond quickly to the implementations of new regulations about the use of agricultural products. This raptor was confirmed as a good sentinel species allowing rapid detection of changes in pesticides use.
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Affiliation(s)
- Pilar Gómez-Ramírez
- Department of Toxicology, Faculty of Veterinary Medicine, University of Murcia, Campus de Espinardo, 30100 Murcia, Spain; Group of Toxicology and Risk Assessment, Institute for Biomedical Research of Murcia Region, IMIB-Arrixaca, University of Murcia, 30100, Murcia, Spain
| | - Juan Manuel Pérez-García
- Ecology Area, Department of Applied Biology. University Miguel Hernández, 03202 Elche, Spain; Department of Animal Sciences, Faculty of Life Sciences and Engineering, University of Lleida, 25198 Lleida, Spain.
| | - Mario León-Ortega
- Department of Ecology and Hydrology, University of Murcia, Espinardo Campus, 30100 Murcia, Spain
| | - José Enrique Martínez
- Department of Ecology and Hydrology, University of Murcia, Espinardo Campus, 30100 Murcia, Spain
| | - José Francisco Calvo
- Department of Ecology and Hydrology, University of Murcia, Espinardo Campus, 30100 Murcia, Spain
| | | | - Francisco Botella
- Ecology Area, Department of Applied Biology. University Miguel Hernández, 03202 Elche, Spain
| | - Pedro María-Mojica
- "Santa Faz" Wildlife Rehabilitation Centre, Alicante, Autonomous Community of Valencia, Spain
| | - Emma Martínez-López
- Department of Toxicology, Faculty of Veterinary Medicine, University of Murcia, Campus de Espinardo, 30100 Murcia, Spain; Group of Toxicology and Risk Assessment, Institute for Biomedical Research of Murcia Region, IMIB-Arrixaca, University of Murcia, 30100, Murcia, Spain
| | - Antonio Juan García-Fernández
- Department of Toxicology, Faculty of Veterinary Medicine, University of Murcia, Campus de Espinardo, 30100 Murcia, Spain; Group of Toxicology and Risk Assessment, Institute for Biomedical Research of Murcia Region, IMIB-Arrixaca, University of Murcia, 30100, Murcia, Spain
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5
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Gómez-Ramírez P, Bustnes JO, Eulaers I, Herzke D, Johnsen TV, Lepoint G, Pérez-García JM, García-Fernández AJ, Jaspers VLB. Corrigendum to "Per- and polyfluoroalkyl substances in plasma and feathers of nestling birds of prey from Northern Norway" [Environ. Res. 158 (2017) 277-285]. Environ Res 2017; 159:648-649. [PMID: 28941637 DOI: 10.1016/j.envres.2017.09.008] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- P Gómez-Ramírez
- Department of Toxicology, Faculty of Veterinary Medicine, University of Murcia, Campus de Espinardo, 30100 Murcia, Spain.
| | - J O Bustnes
- Norwegian Institute for Nature Research, The Fram Centre, 9296 Tromsø, Norway
| | - I Eulaers
- Aarhus University, 4000 Roskilde, Denmark
| | - D Herzke
- Norwegian Institute for Air Research, 9010 Tromsø, Norway
| | - T V Johnsen
- Norwegian Institute for Nature Research, The Fram Centre, 9296 Tromsø, Norway
| | - G Lepoint
- Laboratory of Oceanology, University of Liège, B6c, 4000 Liège, Belgium
| | - J M Pérez-García
- Ecology Area, Department of Applied Biology. University Miguel Hernández, 03202 Elche, Spain; Department of Animal Sciences, Faculty of Life Sciences and Engineering, University of Lleida, 25198 Lleida, Spain
| | - A J García-Fernández
- Department of Toxicology, Faculty of Veterinary Medicine, University of Murcia, Campus de Espinardo, 30100 Murcia, Spain
| | - V L B Jaspers
- Department of Biology, Norwegian University of Science and Technology (NTNU), 7024 Trondheim, Norway
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Gómez-Ramírez P, Bustnes JO, Eulaers I, Herzke D, Johnsen TV, Lepoint G, Pérez-García JM, García-Fernández AJ, Jaspers VLB. Per- and polyfluoroalkyl substances in plasma and feathers of nestling birds of prey from northern Norway. Environ Res 2017; 158:277-285. [PMID: 28662453 DOI: 10.1016/j.envres.2017.06.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 06/13/2017] [Accepted: 06/19/2017] [Indexed: 06/07/2023]
Abstract
Plasma samples from nestlings of two top predators, White-tailed eagle (Haliaeetus albicilla) and Northern goshawk (Accipiter gentilis) from northern Norway were analysed for a wide range of per- and polyfluoroalkyl substances (PFASs). Body feathers from the White-tailed eagles were also analysed and significant associations between specific PFASs in blood plasma and body feathers were found (0.36 <R2 < 0.67; all p < 0.05). This result suggests that analysing body feathers of White-tailed eagle could potentially be a useful non-invasive strategy to monitor PFASs exposure in nestlings of this species. White-tailed eagles showed significantly higher levels of contaminants than Northern goshawks (plasma ∑PFASs Median = 45.83 vs 17.02ngmL-1, p <0.05). The different exposure between both species seemed to be related to different dietary input, as quantified by stable carbon and nitrogen isotope analysis of body feathers. A priori, the bird of prey populations studied are not at risk for PFASs, since the levels in plasma of both species were hundreds to thousand times lower than the toxic reference values reported for predatory birds. However, further studies on larger sample sizes are needed to confirm this hypothesis since toxic thresholds for nestling birds of prey are not established.
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Affiliation(s)
- P Gómez-Ramírez
- Department of Toxicology, Faculty of Veterinary Medicine, University of Murcia, Campus de Espinardo, 30100 Murcia, Spain.
| | - J O Bustnes
- Norwegian Institute for Nature Research, The Fram Centre, 9296 Tromsø, Norway
| | - I Eulaers
- Aarhus University, 4000 Roskilde, Denmark
| | - D Herzke
- Norwegian Institute for Air Research, 9010 Tromsø, Norway
| | - T V Johnsen
- Norwegian Institute for Nature Research, The Fram Centre, 9296 Tromsø, Norway
| | - G Lepoint
- Laboratory of Oceanology, University of Liège, B6c, 4000 Liège, Belgium
| | - J M Pérez-García
- Ecology Area, Department of Applied Biology, University Miguel Hernández, 03202 Elche, Spain; Department of Animal Sciences, Faculty of Life Sciences and Engineering, University of Lleida, 25198 Lleida, Spain
| | - A J García-Fernández
- Department of Toxicology, Faculty of Veterinary Medicine, University of Murcia, Campus de Espinardo, 30100 Murcia, Spain
| | - V L B Jaspers
- Department of Biology, Norwegian University of Science and Technology (NTNU), 7024 Trondheim, Norway
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Graciá E, Ortego J, Godoy JA, Pérez-García JM, Blanco G, del Mar Delgado M, Penteriani V, Almodóvar I, Botella F, Sánchez-Zapata JA. Genetic Signatures of Demographic Changes in an Avian Top Predator during the Last Century: Bottlenecks and Expansions of the Eurasian Eagle Owl in the Iberian Peninsula. PLoS One 2015; 10:e0133954. [PMID: 26230922 PMCID: PMC4521928 DOI: 10.1371/journal.pone.0133954] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 07/03/2015] [Indexed: 11/18/2022] Open
Abstract
The study of the demographic history of species can help to understand the negative impact of recent population declines in organisms of conservation concern. Here, we use neutral molecular markers to explore the genetic consequences of the recent population decline and posterior recovery of the Eurasian eagle owl (Bubo bubo) in the Iberian Peninsula. During the last century, the species was the object of extermination programs, suffering direct persecution by hunters until the 70's. Moreover, during the last decades the eagle owl was severely impacted by increased mortality due to electrocution and the decline of its main prey species, the European rabbit (Oryctolagus cuniculus). In recent times, the decrease of direct persecution and the implementation of some conservation schemes have allowed the species' demographic recovery. Yet, it remains unknown to which extent the past population decline and the later expansion have influenced the current species' pattern of genetic diversity. We used eight microsatellite markers to genotype 235 eagle owls from ten Spanish subpopulations and analyse the presence of genetic signatures attributable to the recent population fluctuations experienced by the species. We found moderate levels of differentiation among the studied subpopulations and Bayesian analyses revealed the existence of three genetic clusters that grouped subpopulations from central, south-western and south-eastern Spain. The observed genetic structure could have resulted from recent human-induced population fragmentation, a patchy distribution of prey populations and/or the philopatric behaviour and habitat selection of the species. We detected an old population bottleneck, which occurred approximately 10,000 years ago, and significant signatures of recent demographic expansions. However, we did not find genetic signatures for a recent bottleneck, which may indicate that population declines were not severe enough to leave detectable signals on the species genetic makeup or that such signals have been eroded by the rapid demographic recovery experienced by the species in recent years.
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Affiliation(s)
- Eva Graciá
- Ecology Area, Department of Applied Biology, Miguel Hernández University, Elche, Spain
| | - Joaquín Ortego
- Genetic and Cultural Biodiversity Group, Hunting Resources Research Institute, CSIC-UCLM-JCCM, Ciudad Real, Spain
- Department of Integrative Ecology, Doñana Biological Station, CSIC, Seville, Spain
| | - José Antonio Godoy
- Department of Integrative Ecology, Doñana Biological Station, CSIC, Seville, Spain
| | | | - Guillermo Blanco
- Department of Evolutionary Ecology, National Museum of Natural History, CSIC, Madrid, Spain
| | - María del Mar Delgado
- Department of Biosciences, Metapopulation Research Group, University of Helsinki, Helsinki, Finland
- Research Unit of Biodiversity, UMIB, UO-CSIC-PA, Oviedo University, Campus de Mieres, Mieres, Spain
| | - Vincenzo Penteriani
- Research Unit of Biodiversity, UMIB, UO-CSIC-PA, Oviedo University, Campus de Mieres, Mieres, Spain
- Department of Conservation Biology, Doñana Biological Station, CSIC, Seville, Spain
| | - Irene Almodóvar
- Ecology Area, Department of Applied Biology, Miguel Hernández University, Elche, Spain
| | - Francisco Botella
- Ecology Area, Department of Applied Biology, Miguel Hernández University, Elche, Spain
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Pérez-García JM, Sebastián-González E, Alexander KL, Sánchez-Zapata JA, Botella F. Effect of landscape configuration and habitat quality on the community structure of waterbirds using a man-made habitat. EUR J WILDLIFE RES 2014. [DOI: 10.1007/s10344-014-0854-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Serra V, Gris-Oliver A, Saura C, Oliveira M, Piris A, Ibrahim YH, Prudkin L, Pérez-García JM, Baselga J, Cortés J. Abstract P5-08-06: PI3K blockade enhances the antitumor activity of eribulin in PIK3CA-mutant eribulin-resistant tumor xenografts. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p5-08-06] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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
Eribulin is a recently approved microtubule-targeting agent (MTA) for the management of heavily pretreated metastatic breast cancer (BC) patients. Constitutive PI3K/Akt/mTOR survival pathway activation, either via mutational activation of the PI3K catalytic subunit (PIK3CA) or via inactivation of the tumor suppressor PTEN, may confer resistance to MTAs. Hence, we hypothesized that PI3K-pathway activation limits the antitumor activity of eribulin in HER2-negative BC and that PI3K inhibition enhances the efficacy of this chemotherapeutic agent.
The predictive value of PIK3CA mutation or PTEN loss towards eribulin response was interrogated in vitro, using a panel of fourteen HER2-negative BC cell lines, and in vivo using six tumor models from cell-line or patient-derived tumors. While PIK3CA mutation did not seem to be predictive in vitro, the PIK3CA-mutated xenograft models underwent tumor progression upon single-agent eribulin therapy (Table 1). In the absence of concomitant PIK3CA mutation, PTEN loss was neither predictive in vitro nor in vivo. Moreover, eribulin induced PI3K-pathway activation in tumor xenografts, a potential escape mechanism to MTA-therapy. To validate the negative predictive value of PIK3CA mutation, BC tumors from patients treated with eribulin in the neoadjuvant and in the metastatic setting are being queried, as the pharmacodynamic activation of the PI3K-pathway upon eribulin treatment.
Class I pan-PI3K (BKM120) or PI3K-a-specific (BYL719) inhibitors were used in vitro to block the PI3K-pathway concomitantly with eribulin treatment, resulting in enhanced antiproliferative and proapoptotic activity. Strikingly, in PIK3CA mutant xenograft models, while eribulin alone exhibited limited antitumor activity compared to PIK3CA-wild type models, co-administration of a PI3K inhibitor induced marked tumor regression (BKM120 data in Table 1, BYL719 data will be reported). Moreover, addition of the PI3K inhibitor at progression with eribulin single-agent also resulted in tumor regression. Of note, PIK3CA-wild type models also exhibited increased antitumor activity with the combined therapy compared to single-agent treatments. The precise mechanism by which the combination of eribulin and a PI3K-targeting agent results in tumor regression is currently under investigation, embracing both the induction of mitotic catastrophe in tumor cells and the regularization of the tumor vasculature.
These results support the clinical development of therapeutic regimens combining PI3K-inhibitors to the approved MTA eribulin and might be predictive of clinical benefit both in the PIK3CA-mutant and -wild type breast cancer population.
Table 1. Percentage change in tumor volume.StatusPIK3CA mutantPIK3CA mutant and PTEN-lowPTEN-lowWTModel/ TreatmentMCF7LPDX44CAL51MDA-MB-468PDX88PDX98Eribulin39 ± 9683 ± 51364 ± 127-47 ± 14-26 ± 34-36 ± 33BKM120501 ± 169116 ± 111119 ± 73-9 ± 23128 ± 3787 ± 112Eribulin + BKM120-70 ± 27-80 ± 1051 ± 46-75 ± 12-94 ± 5-65 ± 13Patient- (PDX) and cell line-derived tumor xenografts were treated with eribulin mesylate (0.1mg/kg, 3IW) and/or BKM120 (27.5 mg/kg, 6IW) for 26-31 days.. IW, in week.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P5-08-06.
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Affiliation(s)
- V Serra
- Vall d'Hebron Institute of Oncology, Barcelona, Spain; MSKCC, New York, NY
| | - A Gris-Oliver
- Vall d'Hebron Institute of Oncology, Barcelona, Spain; MSKCC, New York, NY
| | - C Saura
- Vall d'Hebron Institute of Oncology, Barcelona, Spain; MSKCC, New York, NY
| | - M Oliveira
- Vall d'Hebron Institute of Oncology, Barcelona, Spain; MSKCC, New York, NY
| | - A Piris
- Vall d'Hebron Institute of Oncology, Barcelona, Spain; MSKCC, New York, NY
| | - YH Ibrahim
- Vall d'Hebron Institute of Oncology, Barcelona, Spain; MSKCC, New York, NY
| | - L Prudkin
- Vall d'Hebron Institute of Oncology, Barcelona, Spain; MSKCC, New York, NY
| | - JM Pérez-García
- Vall d'Hebron Institute of Oncology, Barcelona, Spain; MSKCC, New York, NY
| | - J Baselga
- Vall d'Hebron Institute of Oncology, Barcelona, Spain; MSKCC, New York, NY
| | - J Cortés
- Vall d'Hebron Institute of Oncology, Barcelona, Spain; MSKCC, New York, NY
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Puértolas JA, Pérez-García JM, Juan E, Ríos R. Design of a suture anchor based on the superelasticity of the Ni-Ti alloy. Biomed Mater Eng 2003; 12:283-9. [PMID: 12446943] [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: 02/27/2023]
Abstract
We have designed and manufacture a prototype of a new anchoring system for soft bone tissue fixation, based on the superelasticity of the Ni-Ti alloy. The anchoring capability has been observed in femoral hips by radiographs. The performance of this new anchor have been measured by tensile experiments and contrasted with finite element model. The results point out that keeping the fixation capacity, the new configuration presents advantages concerning to a minor damaged volume bone, a reduction of the manufacture cost and a simpler insertion.
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Affiliation(s)
- J A Puértolas
- Department of Materials Science and Technology, Centro Politécnico Superior-ICMA, University of Zaragoza-CSIC, 50015 Zaragoza, Spain.
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