6 research outputs found

    Évaluation des risques pour la santĂ© humaine et l’environnement et recommandations pour leurmaĂźtrise, dans le cadre de l’administration des mĂ©dicaments vĂ©tĂ©rinaires antiparasitaires externes sous forme de bains, douches et pulvĂ©risations en Ă©levages de ruminants

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    Citation suggĂ©rĂ©e : Anses. (2022). Evaluation des risques pour la santĂ© humaine et l’environnement et recommandations pour leur maĂźtrise, dans le cadre de l’administration des mĂ©dicaments vĂ©tĂ©rinaires antiparasitaires externes sous forme de bains, douches et pulvĂ©risations en Ă©levages ruminants. (Saisine n° 2018-SA-0269). Maisons-Alfort : Anses, 282 p.L’émergence ou la rĂ©Ă©mergence de maladies vectorielles dont les agents pathogĂšnes sonttransmis par des insectes ou des tiques, l’augmentation de la prĂ©valence de la galepsoroptique chez les ruminants, conduisent les vĂ©tĂ©rinaires Ă  prescrire entre autres destraitements antiparasitaires externes (APE) sous forme de bains, douches, pulvĂ©risations(BDP). Ces antiparasitaires sont des organophosphorĂ©s (OP), des pyrĂ©thrinoĂŻdes ou encoreun inhibiteur de la croissance larvaire.Ces traitements occasionnent une exposition des travailleurs aux Ă©mulsions antiparasitairesavec des risques potentiels pour l’utilisateur (pulvĂ©risations et inhalation, bains/douches etĂ©claboussures
) et pour l’environnement (ruissellements des Ă©mulsions lors de pulvĂ©risation,douche, Ă©pandage des reliquats de baignoire
). De plus, des dĂ©fauts d’efficacitĂ© observĂ©svis-Ă -vis de certaines myiases (Wohlfahrtia magnifica) conduisent Ă  des pratiques Ă©loignĂ©esdes recommandations de prescription (surconcentrations, mĂ©langes de diffĂ©rentes molĂ©cules,applications locales
).Les recommandations peuprĂ©cises des rĂ©sumĂ©s des caractĂ©ristiques du produit (RCP)induisent un questionnement de la part des utilisateurs en termes de prĂ©vention de la santĂ©des professionnels, d’impact environnemental notamment liĂ© Ă  l’élimination des effluents desĂ©levages. Il en dĂ©coule une nĂ©cessitĂ© de prĂ©ciser davantage les pratiques d’utilisation de cesmĂ©dicaments vĂ©tĂ©rinaires

    Morphology and genomic hallmarks of breast tumours developed by ATM deleterious variant carriers

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    Abstract Background The ataxia telangiectasia mutated (ATM) gene is a moderate-risk breast cancer susceptibility gene; germline loss-of-function variants are found in up to 3% of hereditary breast and ovarian cancer (HBOC) families who undergo genetic testing. So far, no clear histopathological and molecular features of breast tumours occurring in ATM deleterious variant carriers have been described, but identification of an ATM-associated tumour signature may help in patient management. Methods To characterise hallmarks of ATM-associated tumours, we performed systematic pathology review of tumours from 21 participants from ataxia-telangiectasia families and 18 participants from HBOC families, as well as copy number profiling on a subset of 23 tumours. Morphology of ATM-associated tumours was compared with that of 599 patients with no BRCA1 and BRCA2 mutations from a hospital-based series, as well as with data from The Cancer Genome Atlas. Absolute copy number and loss of heterozygosity (LOH) profiles were obtained from the OncoScan SNP array. In addition, we performed whole-genome sequencing on four tumours from ATM loss-of-function variant carriers with available frozen material. Results We found that ATM-associated tumours belong mostly to the luminal B subtype, are tetraploid and show LOH at the ATM locus at 11q22–23. Unlike tumours in which BRCA1 or BRCA2 is inactivated, tumours arising in ATM deleterious variant carriers are not associated with increased large-scale genomic instability as measured by the large-scale state transitions signature. Losses at 13q14.11-q14.3, 17p13.2-p12, 21p11.2-p11.1 and 22q11.23 were observed. Somatic alterations at these loci may therefore represent biomarkers for ATM testing and harbour driver mutations in potentially ‘druggable’ genes that would allow patients to be directed towards tailored therapeutic strategies. Conclusions Although ATM is involved in the DNA damage response, ATM-associated tumours are distinct from BRCA1-associated tumours in terms of morphological characteristics and genomic alterations, and they are also distinguishable from sporadic breast tumours, thus opening up the possibility to identify ATM variant carriers outside the ataxia-telangiectasia disorder and direct them towards effective cancer risk management and therapeutic strategies
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