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1.
Cell Mol Life Sci ; 81(1): 215, 2024 May 13.
Artigo em Inglês | MEDLINE | ID: mdl-38739166

RESUMO

Down syndrome (DS) is a genetic disease characterized by a supernumerary chromosome 21. Intellectual deficiency (ID) is one of the most prominent features of DS. Central nervous system defects lead to learning disabilities, motor and language delays, and memory impairments. At present, a prenatal treatment for the ID in DS is lacking. Subcutaneous administration of synthetic preimplantation factor (sPIF, a peptide with a range of biological functions) in a model of severe brain damage has shown neuroprotective and anti-inflammatory properties by directly targeting neurons and microglia. Here, we evaluated the effect of PIF administration during gestation and until weaning on Dp(16)1Yey mice (a mouse model of DS). Possible effects at the juvenile stage were assessed using behavioral tests and molecular and histological analyses of the brain. To test the influence of perinatal sPIF treatment at the adult stage, hippocampus-dependent memory was evaluated on postnatal day 90. Dp(16)1Yey pups showed significant behavioral impairment, with impaired neurogenesis, microglial cell activation and a low microglial cell count, and the deregulated expression of genes linked to neuroinflammation and cell cycle regulation. Treatment with sPIF restored early postnatal hippocampal neurogenesis, with beneficial effects on astrocytes, microglia, inflammation, and cell cycle markers. Moreover, treatment with sPIF restored the level of DYRK1A, a protein that is involved in cognitive impairments in DS. In line with the beneficial effects on neurogenesis, perinatal treatment with sPIF was associated with an improvement in working memory in adult Dp(16)1Yey mice. Perinatal treatment with sPIF might be an option for mitigating cognitive impairments in people with DS.


Assuntos
Modelos Animais de Doenças , Síndrome de Down , Neurogênese , Animais , Síndrome de Down/tratamento farmacológico , Síndrome de Down/patologia , Síndrome de Down/metabolismo , Síndrome de Down/complicações , Síndrome de Down/genética , Neurogênese/efeitos dos fármacos , Camundongos , Feminino , Gravidez , Hipocampo/metabolismo , Hipocampo/patologia , Hipocampo/efeitos dos fármacos , Microglia/metabolismo , Microglia/efeitos dos fármacos , Microglia/patologia , Proteínas Serina-Treonina Quinases/metabolismo , Proteínas Serina-Treonina Quinases/genética , Proteínas Tirosina Quinases/metabolismo , Proteínas Tirosina Quinases/genética , Quinases Dyrk , Disfunção Cognitiva/tratamento farmacológico , Disfunção Cognitiva/metabolismo , Disfunção Cognitiva/patologia , Masculino , Transtornos Cognitivos/tratamento farmacológico , Transtornos Cognitivos/patologia
2.
Med Sci (Paris) ; 40(2): 203-205, 2024 Feb.
Artigo em Francês | MEDLINE | ID: mdl-38411431

RESUMO

Title: La glutathionylation de la protéine mitochondriale humaine MIA40 régule l'homéostasie des ROS. Abstract: Dans le cadre du module d'enseignement « Physiopathologie de la signalisation ¼ proposé par l'université Paris-Saclay, les étudiants du Master « Biologie Santé ¼ se sont confrontés à l'écriture scientifique. Ils ont sélectionné des articles scientifiques dans le domaine de la signalisation cellulaire présentant des résultats originaux, via des approches expérimentales variées, sur des thèmes allant de l'exploration des sites de contacts membranaires aux mécanismes moléculaires de la ferroptose, en passant par la signalisation hépatique et tumorale. Après un travail préparatoire réalisé avec l'équipe pédagogique, les étudiants, organisés en binômes/trinômes, ont ensuite rédigé, guidés par des chercheurs, une Nouvelle soulignant les résultats majeurs et l'originalité de l'article étudié. Ils ont beaucoup apprécié cette initiation à l'écriture d'articles scientifiques et, comme vous pourrez le lire, se sont investis dans ce travail avec enthousiasme !


Assuntos
Espécies Reativas de Oxigênio , Humanos
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