Titre : Syndrome de Li-Fraumeni

Syndrome de Li-Fraumeni : Questions médicales fréquentes

Termes MeSH sélectionnés :

Complement C5a
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"Diagnostic", "headline": "Diagnostic sur Syndrome de Li-Fraumeni", "description": "Comment est diagnostiqué le syndrome de Li-Fraumeni ?\nQuels tests génétiques sont utilisés ?\nQuels critères cliniques sont utilisés pour le diagnostic ?\nLe diagnostic peut-il être posé à tout âge ?\nLes tests de dépistage sont-ils recommandés ?", "url": "https://questionsmedicales.fr/mesh/D016864?mesh_terms=Complement+C5a&page=3#section-diagnostic" }, { "@type": "MedicalWebPage", "name": "Symptômes", "headline": "Symptômes sur Syndrome de Li-Fraumeni", "description": "Quels sont les symptômes du syndrome de Li-Fraumeni ?\nLes symptômes apparaissent-ils à un âge précoce ?\nY a-t-il des signes spécifiques à surveiller ?\nLes symptômes sont-ils toujours liés à des cancers ?\nLes symptômes peuvent-ils varier d'une personne à l'autre ?", "url": "https://questionsmedicales.fr/mesh/D016864?mesh_terms=Complement+C5a&page=3#section-symptômes" }, { "@type": "MedicalWebPage", "name": "Prévention", "headline": 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"Complications sur Syndrome de Li-Fraumeni", "description": "Quelles complications peuvent survenir avec ce syndrome ?\nLes complications sont-elles prévisibles ?\nComment gérer les complications psychologiques ?\nLes complications peuvent-elles affecter la qualité de vie ?\nY a-t-il des complications spécifiques aux traitements ?", "url": "https://questionsmedicales.fr/mesh/D016864?mesh_terms=Complement+C5a&page=3#section-complications" }, { "@type": "MedicalWebPage", "name": "Facteurs de risque", "headline": "Facteurs de risque sur Syndrome de Li-Fraumeni", "description": "Quels sont les principaux facteurs de risque ?\nLe mode de vie influence-t-il le risque ?\nLes femmes sont-elles plus à risque ?\nL'âge joue-t-il un rôle dans le risque ?\nLes facteurs environnementaux sont-ils impliqués ?", "url": "https://questionsmedicales.fr/mesh/D016864?mesh_terms=Complement+C5a&page=3#section-facteurs de risque" } ] }, { "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Comment est diagnostiqué le syndrome de Li-Fraumeni ?", "position": 1, "acceptedAnswer": { "@type": "Answer", "text": "Le diagnostic repose sur l'historique familial et des tests génétiques pour identifier des mutations." } }, { "@type": "Question", "name": "Quels tests génétiques sont utilisés ?", "position": 2, "acceptedAnswer": { "@type": "Answer", "text": "Les tests ciblent principalement les gènes TP53 et d'autres gènes associés au cancer." } }, { "@type": "Question", "name": "Quels critères cliniques sont utilisés pour le diagnostic ?", "position": 3, "acceptedAnswer": { "@type": "Answer", "text": "Les critères incluent des antécédents familiaux de cancers précoces et multiples." } }, { "@type": "Question", "name": "Le diagnostic peut-il être posé à tout âge ?", "position": 4, "acceptedAnswer": { "@type": "Answer", "text": "Oui, le diagnostic peut être établi à tout âge, souvent après l'apparition de cancers." } }, { "@type": "Question", "name": "Les tests de dépistage sont-ils recommandés ?", "position": 5, "acceptedAnswer": { "@type": "Answer", "text": "Oui, un dépistage régulier est conseillé pour détecter précocement les cancers." } }, { "@type": "Question", "name": "Quels sont les symptômes du syndrome de Li-Fraumeni ?", "position": 6, "acceptedAnswer": { "@type": "Answer", "text": "Les symptômes varient selon le type de cancer, incluant des douleurs, des masses et des changements de poids." } }, { "@type": "Question", "name": "Les symptômes apparaissent-ils à un âge précoce ?", "position": 7, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les cancers associés apparaissent souvent chez les jeunes adultes ou même les enfants." } }, { "@type": "Question", "name": "Y a-t-il des signes spécifiques à surveiller ?", "position": 8, "acceptedAnswer": { "@type": "Answer", "text": "Surveillez les douleurs persistantes, les changements cutanés et les anomalies mammaires." } }, { "@type": "Question", "name": "Les symptômes sont-ils toujours liés à des cancers ?", "position": 9, "acceptedAnswer": { "@type": "Answer", "text": "Pas toujours, mais tout symptôme persistant doit être évalué par un professionnel." } }, { "@type": "Question", "name": "Les symptômes peuvent-ils varier d'une personne à l'autre ?", "position": 10, "acceptedAnswer": { "@type": "Answer", "text": "Oui, l'expression des symptômes peut varier en fonction des cancers développés." } }, { "@type": "Question", "name": "Comment prévenir le syndrome de Li-Fraumeni ?", "position": 11, "acceptedAnswer": { "@type": "Answer", "text": "Il n'existe pas de prévention, mais un dépistage régulier peut aider à détecter les cancers tôt." } }, { "@type": "Question", "name": "Les personnes à risque doivent-elles se faire dépister ?", "position": 12, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les personnes à risque élevé doivent suivre un programme de dépistage régulier." } }, { "@type": "Question", "name": "Y a-t-il des recommandations pour les familles touchées ?", "position": 13, "acceptedAnswer": { "@type": "Answer", "text": "Les familles doivent consulter des conseillers en génétique pour des recommandations personnalisées." } }, { "@type": "Question", "name": "Les habitudes de vie peuvent-elles influencer le risque ?", "position": 14, "acceptedAnswer": { "@type": "Answer", "text": "Adopter un mode de vie sain peut réduire le risque de certains cancers, mais pas tous." } }, { "@type": "Question", "name": "Les tests génétiques sont-ils recommandés pour tous ?", "position": 15, "acceptedAnswer": { "@type": "Answer", "text": "Non, ils sont recommandés principalement pour les personnes ayant des antécédents familiaux." } }, { "@type": "Question", "name": "Quels traitements sont disponibles pour ce syndrome ?", "position": 16, "acceptedAnswer": { "@type": "Answer", "text": "Les traitements incluent la chirurgie, la chimiothérapie et la radiothérapie selon le cancer." } }, { "@type": "Question", "name": "La prévention des cancers est-elle possible ?", "position": 17, "acceptedAnswer": { "@type": "Answer", "text": "Une surveillance régulière et des interventions précoces peuvent aider à prévenir certains cancers." } }, { "@type": "Question", "name": "Les traitements sont-ils différents selon le cancer ?", "position": 18, "acceptedAnswer": { "@type": "Answer", "text": "Oui, chaque type de cancer peut nécessiter un traitement spécifique adapté." } }, { "@type": "Question", "name": "Y a-t-il des traitements expérimentaux disponibles ?", "position": 19, "acceptedAnswer": { "@type": "Answer", "text": "Des essais cliniques peuvent offrir des options de traitement innovantes pour les patients." } }, { "@type": "Question", "name": "Le suivi post-traitement est-il important ?", "position": 20, "acceptedAnswer": { "@type": "Answer", "text": "Oui, un suivi régulier est crucial pour détecter toute récidive ou nouveaux cancers." } }, { "@type": "Question", "name": "Quelles complications peuvent survenir avec ce syndrome ?", "position": 21, "acceptedAnswer": { "@type": "Answer", "text": "Les complications incluent des cancers multiples, des effets secondaires des traitements et des problèmes psychologiques." } }, { "@type": "Question", "name": "Les complications sont-elles prévisibles ?", "position": 22, "acceptedAnswer": { "@type": "Answer", "text": "Certaines complications peuvent être anticipées, mais d'autres peuvent survenir de manière inattendue." } }, { "@type": "Question", "name": "Comment gérer les complications psychologiques ?", "position": 23, "acceptedAnswer": { "@type": "Answer", "text": "Un soutien psychologique et des groupes de soutien peuvent aider à gérer l'anxiété et la dépression." } }, { "@type": "Question", "name": "Les complications peuvent-elles affecter la qualité de vie ?", "position": 24, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les complications liées aux traitements et aux cancers peuvent altérer la qualité de vie." } }, { "@type": "Question", "name": "Y a-t-il des complications spécifiques aux traitements ?", "position": 25, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les traitements peuvent entraîner des effets secondaires comme la fatigue, la nausée et l'immunosuppression." } }, { "@type": "Question", "name": "Quels sont les principaux facteurs de risque ?", "position": 26, "acceptedAnswer": { "@type": "Answer", "text": "Les antécédents familiaux de cancers et les mutations génétiques, notamment TP53, sont des facteurs clés." } }, { "@type": "Question", "name": "Le mode de vie influence-t-il le risque ?", "position": 27, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des facteurs comme le tabagisme et l'alimentation peuvent influencer le risque de cancer." } }, { "@type": "Question", "name": "Les femmes sont-elles plus à risque ?", "position": 28, "acceptedAnswer": { "@type": "Answer", "text": "Non, le syndrome affecte également les hommes, bien que certains cancers soient plus fréquents chez les femmes." } }, { "@type": "Question", "name": "L'âge joue-t-il un rôle dans le risque ?", "position": 29, "acceptedAnswer": { "@type": "Answer", "text": "Oui, le risque de développer des cancers augmente avec l'âge, surtout après 30 ans." } }, { "@type": "Question", "name": "Les facteurs environnementaux sont-ils impliqués ?", "position": 30, "acceptedAnswer": { "@type": "Answer", "text": "Des facteurs environnementaux peuvent contribuer au risque, mais le syndrome est principalement génétique." } } ] } ] }

Sources (1648 au total)

Anti-C5a antibody vilobelimab treatment and the effect on biomarkers of inflammation and coagulation in patients with severe COVID-19: a substudy of the phase 2 PANAMO trial.

We recently reported in the phase 3 PANAMO trial that selectively blocking complement 5a (C5a) with vilobelimab led to improved survival in critically ill COVID-19 patients. C5a is an important contri...

The case for complement component 5 as a target in neurodegenerative disease.

Complement-based drug discovery is undergoing a renaissance, empowered by new advances in structural biology, complement biology and drug development. Certain components of the complement pathway, par... We will discuss the evidence supporting C5 as a target in neurodegenerative disease, along with the current progress in developing different classes of C5 inhibitors and the gaps in knowledge that wil... Validation of C5 as a therapeutic target for neurodegenerative disease would represent a major step forward for complement therapeutics research and has the potential to furnish disease-modifying drug...

Different Complement Activation Patterns Following C5 Cleavage in MOGAD and AQP4-IgG+NMOSD.

In myelin oligodendrocyte glycoprotein IgG-associated disease (MOGAD) and aquaporin-4 IgG+ neuromyelitis optica spectrum disorder (AQP4+NMOSD), the autoantibodies are mainly composed of IgG1, and comp... CSF-C3a, CSF-C4a, CSF-C5a, and CSF-C5b-9 levels during the acute phase before treatment in patients with MOGAD (n = 12), AQP4+NMOSD (n = 11), multiple sclerosis (MS) (n = 5), and noninflammatory neuro... CSF-C3a and CSF-C5a levels were significantly higher in MOGAD (mean ± SD, 5,629 ± 1,079 pg/mL and 2,930 ± 435.8 pg/mL) and AQP4+NMOSD (6,017 ± 3,937 pg/mL and 2,544 ± 1,231 pg/mL) than in MS (1,507 ± ... The complement pathway is activated in both MOGAD and AQP4+NMOSD, but MAC formation is lower in MOGAD, particularly in those with mild attacks, than in AQP4+NMOSD. These findings may have pathogenetic...

Serum Depletion of Complement Component 5a Is Associated With Increased Inflammation and Poor Clinical Outcomes in Patients With Perianal Fistulas.

Persistent disease is a significant issue in the management of perianal fistulas, with up to 50% of patients requiring additional treatment after surgery.... This study aimed to identify a novel prognostic modality in hopes of risk-stratifying patients for persistent disease following corrective surgery.... This was a retrospective study based on prospectively collected data using a combination of histopathology, high-throughput proteomic arrays, and ELISA-based methods.... This study used data obtained from patients who underwent corrective surgery for perianal fistulas at the University of Illinois Hospital between June 2019 and July 2020.... A cohort of 22 consecutive patients who had corrective surgery for perianal fistulas were included in this study. The patients were divided into 2 groups: those with resolving fistulas (N = 13) and th... Nonresolving fistulas were determined by disease representation within 2 months of corrective surgery.... Serum samples from patients with persistent perianal fistulas displayed a consistent decrease in the expression of complement pathway component C5a compared with either healthy controls or patients wi... This study was limited by its retrospective design, relatively small sample size, and single-center data analysis.... These results suggest that C5a is modestly depleted in patients with nonresolving forms of disease and traffics to the site of tissue damage and inflammation. Accordingly, serum C5a warrants continued... ANTECEDENTES:La persistencia de la enfermedad es un problema significativo en el manejo de las fístulas perianales, presente hasta en el 50 % de los pacientes después de la cirugía y que requieren tra...

Correlation of serum complement factor 5a level with inflammatory response and cognitive function in patients with Alzheimer's disease of different severity.

Alzheimer's disease (AD) is a common cause of dementia. Serum complement factor 5a (C5a) is exceedingly implicated in AD. We explored the role of C5a levels in AD patients of different severity.... Mild, moderate, and severe AD patients, and healthy controls were included. C5a and pro-inflammatory factor (TNF-α, IL-1β, IL-6, CRP) levels were assessed by ELISA, and cognitive function was evaluate... Serum C5a, TNF-α, IL-1β, IL-6 and CRP levels were raised, and MMSE score was lowered in AD. Serum C5a, TNF-α, IL-1β, IL-6 and CRP levels in severe AD patients were higher than those in mild/moderate A... Serum C5a level increased with AD severity, and its expression was positively correlated with serum pro-inflammatory factor levels, and negatively correlated with cognitive function....

Dysregulated complement activation during acute myocardial infarction leads to endothelial glycocalyx degradation and endothelial dysfunction via the C5a:C5a-Receptor1 axis.

Complement-mediated damage to the myocardium during acute myocardial infarction (AMI), particularly the late components of the terminal pathway (C5-convertase and C5b-9), have previously been characte... Samples of fifty-five patients with ST-elevation myocardial infarction (STEMI) vs. healthy controls were analyzed in this study. eGC components and C5a levels were determined via ELISA; NO levels were... Serum concentrations of eGC components and C5a were significantly increased during STEMI. Serum and solely C5a stimulation decreased eGC height and stiffness, indicating shedding of the eGC. C5a enhan... This study demonstrates that dysregulated C5a activation during AMI results in eGC damage with subsequent endothelial dysfunction and reduced NO bioavailability, indicating progressively developing va...