{"title":"[Beneficial effects of ketogenic diet for Alzheimer's disease management].","authors":"Anouk Charlot, Alix Lernould, Irène Plus, Joffrey Zoll","doi":"10.1051/jbio/2023031","DOIUrl":"10.1051/jbio/2023031","url":null,"abstract":"<p><p>Alzheimer's disease (AD) is a neurodegenerative disease that affects almost 1 million people in France and 55 million in the world. This pathology is a global health preoccupation because of the lack of efficient curative treatment and the increase of its prevalence. During the last decade, the comprehension of pathophysiological mechanisms involved in AD have been improved. Amyloid plaques and neurofibrillary tangles accumulation are characteristic of Alzheimer's brain patients, accompanied by increased brain inflammation and oxidative stress, impaired cerebral metabolism of glucose and mitochondrial function. Treatment of AD includes different approaches, as pharmacology, psychology support, physiotherapy, and speech therapy. However, these interventions do not have a curative effect, but only compensatory on the disease. Ketogenic diet (KD), a low-carbohydrates and high-fat diet, associated with a medium-chain triglycerides intake (MCTs) might induce benefices for Alzheimer disease patients. Carbohydrate restriction and MCTs promotes the production of ketone bodies from fatty acid degradation. These metabolites replacing glucose, serve the brain as energetic substrates, and induce neuroprotective effects. Such a nutritional support might slow down the disease progression and improve cognitive abilities of patients. This review aims to examine the neuroprotective mechanisms of KD in AD progression and describes the advantages and limitations of KD as a therapeutic strategy.</p>","PeriodicalId":39068,"journal":{"name":"Biologie Aujourd''hui","volume":"217 3-4","pages":"253-263"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138452743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Biologie Aujourd''huiPub Date : 2023-01-01Epub Date: 2023-11-29DOI: 10.1051/jbio/2023030
Georges Chapouthier
{"title":"[Historical and philosophical issues in animal experimentation].","authors":"Georges Chapouthier","doi":"10.1051/jbio/2023030","DOIUrl":"10.1051/jbio/2023030","url":null,"abstract":"<p><p>Initial practices involving experimentation with animals can be found in ancient Greece, but animal experimentation as understood in the modern world first emerged in the Renaissance. In the 19<sup>th</sup> century, the French scientist Claude Bernard analysed the basis for animal experimentation using the Cartesian philosophical concept of animals being equivalent to machines. Yet as Claude Bernard's work on biology developed, it showed that animals, in particular the so-called sentient animals, did have forms of sensitivity and consciousness similar to humans. This led to the present-day moral concern with animal experimentation. The moral argument is expressed in philosophical terms in the Universal Declaration of Animal Rights and the law known as the \"Three Rs\", while the practical measures for implementation are set out in the European Directive 2010/63/EU on the protection of animals used for scientific purposes, and then as transposed and enforced in the different European Union Member States. This has led to improvements in the treatment of animals used for experimentation, and also allows scope for further improvements to be added in the future, particularly with alternative methods.</p>","PeriodicalId":39068,"journal":{"name":"Biologie Aujourd''hui","volume":"217 3-4","pages":"193-198"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138452745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Françoise Dieterlen et la Société de Biologie.","authors":"André Calas","doi":"10.1051/jbio/2023008","DOIUrl":"https://doi.org/10.1051/jbio/2023008","url":null,"abstract":"","PeriodicalId":39068,"journal":{"name":"Biologie Aujourd''hui","volume":"217 1-2","pages":"3-4"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9805500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Hommage à Françoise Dieterlen.","authors":"Nicole Le Douarin","doi":"10.1051/jbio/2023010","DOIUrl":"https://doi.org/10.1051/jbio/2023010","url":null,"abstract":"","PeriodicalId":39068,"journal":{"name":"Biologie Aujourd''hui","volume":"217 1-2","pages":"7"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9805503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"[Remember: Françoise Dieterlen].","authors":"Luc Pardanaud","doi":"10.1051/jbio/2023006","DOIUrl":"https://doi.org/10.1051/jbio/2023006","url":null,"abstract":"<p><p>This Françoise Dieterlen's homage gathers scientific and personal memories between 1984 and 2000, when I worked in her laboratory at Nogent-sur-Marne (France). I describe a clever woman who took care of her students and taught me all fundamental qualities to become a researcher: discipline, rigor and patience.</p>","PeriodicalId":39068,"journal":{"name":"Biologie Aujourd''hui","volume":"217 1-2","pages":"21-25"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9805507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"[Theoretical and clinical implications of trauma].","authors":"Philippe Fossati","doi":"10.1051/jbio/2023005","DOIUrl":"https://doi.org/10.1051/jbio/2023005","url":null,"abstract":"<p><p>Usually, trauma is defined as exposure to an event that threatens death or induces serious injury or sexual violence. Beyond post-traumatic stress disorder (PTSD), trauma may increase the risk for severe mental disorders including mood disorders and psychotic disorder. PTSD, following exposure to a traumatic event, is strongly linked to dissociation. However, in contrast convergent findings indicated that, despite the relationship between peri-traumatic dissociation and later PTSD, many people who develop PTSD do not display dissociative responses in the acute phase after the event. Several risk factors are described for PTSD including previous history of traumatic event, previous mental disorders, genetic factors and gender. It is now proposed to distinguish PTSD with or without dissociative symptoms with some specific neural signature for each syndrome. Dissociation may also lead to change in cultural belief and worldview. According to the terror management theory (TMT), it is suggested that cultural worldviews, self-esteem, and interpersonal relationships work together to protect individuals from death anxiety. The trauma, by disrupting this anxiety buffering system, contributes to change beliefs in victims and exposes them to a feeling of social exclusion.</p>","PeriodicalId":39068,"journal":{"name":"Biologie Aujourd''hui","volume":"217 1-2","pages":"49-53"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9805508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"[Exploring together with Françoise Dieterlen the origin of hematopoietic stem cells].","authors":"Thierry Jaffredo","doi":"10.1051/jbio/2023013","DOIUrl":"https://doi.org/10.1051/jbio/2023013","url":null,"abstract":"<p><p>This article summarizes Françoise Dieterlen's major scientific discoveries about the hematopoietic and endothelial systems during her 40 years' career. Her most remarkable achievements include notably the demonstration of an intraembryonic source of hematopoietic stem cells, the characterization of the polarization of the aorta, the identification of a hemogenic endothelium as well as that of the allantois as an organ of hematopoietic amplification in the mouse embryo, and the demonstration of the existence of a hemogenic endothelium capable of generating hematopoietic stem cells in the bone marrow of the chicken and mouse embryo. While this last discovery was not made directly by Françoise Dieterlen, it was inspired by the many conversations I have had with her and the lessons she has taught me throughout my career. Her rich career will forever shape the field of hematopoietic development, in which she will remain a guiding figure.</p>","PeriodicalId":39068,"journal":{"name":"Biologie Aujourd''hui","volume":"217 1-2","pages":"27-33"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9807890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Denis Peschanski, Bénédicte Pincemin, Serge Heiden, Charlotte Lacoste
{"title":"[Memories of the 13-November 2015 terrorist attacks: what discourse analysis can teach us].","authors":"Denis Peschanski, Bénédicte Pincemin, Serge Heiden, Charlotte Lacoste","doi":"10.1051/jbio/2023017","DOIUrl":"https://doi.org/10.1051/jbio/2023017","url":null,"abstract":"<p><p>The Programme 13-Novembre aims to analyze the individual and collective memory of the terrorist attacks of November 13, 2015. At its heart is the Étude 1000, which is to gather the same 1000 people in audiovisual interviews four times in 10 years. Having the transcripts at our disposal, we choose here to show the importance of discourse analysis by recalling its theoretical foundations, to present one of the tools allowing this statistical analysis, the Correspondence Factor Analysis, and to use it to analyze the sub-corpus of interviews conducted at a distance from the Paris events, with 76 inhabitants of the Metz region. Crossing these volunteers with the words they use, we see that two variables clearly stand out that oppose the vocabularies, the gender variable and the age variable.</p>","PeriodicalId":39068,"journal":{"name":"Biologie Aujourd''hui","volume":"217 1-2","pages":"113-121"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9807895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Francis Eustache, Bérengère Guillery, Denis Peschanski
{"title":"[Memory and traumatism: From biology to humanities].","authors":"Francis Eustache, Bérengère Guillery, Denis Peschanski","doi":"10.1051/jbio/2023021","DOIUrl":"https://doi.org/10.1051/jbio/2023021","url":null,"abstract":"<p><p>This article is a brief Introduction to a series of articles issued from the Journée Claude Bernard, organized at the Académie Nationale de Médecine. This session had for thematic \"Memory and traumatism\" and was composed of presentations coming from different disciplines including biological sciences and humanities. Several publications come from the Programme 13-Novembre, devoted to a traumatic event in French society - the attacks of 13 November 2015 in Paris and its immediate suburbs - and its consequences on the construction of individual and collective memories of this tragic event.</p>","PeriodicalId":39068,"journal":{"name":"Biologie Aujourd''hui","volume":"217 1-2","pages":"35-38"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9807888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}