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Acides aminés, peptides et protéines
Protéines
Métalloprotéines
Protéines de liaison au fer
Protéines à fer non hème
Lipoxygénases
Arachidonate lipoxygenases
Arachidonate lipoxygenases : Questions médicales fréquentes
Termes MeSH sélectionnés :
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"description": "Comment diagnostiquer une dysfonction des lipoxygénases ?\nQuels tests sont utilisés pour évaluer l'activité des lipoxygénases ?\nLes tests génétiques sont-ils utiles pour les lipoxygénases ?\nQuels symptômes peuvent indiquer un problème avec les lipoxygénases ?\nPeut-on mesurer les niveaux de lipoxygénases dans le sang ?",
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"@type": "Question",
"name": "Comment diagnostiquer une dysfonction des lipoxygénases ?",
"position": 1,
"acceptedAnswer": {
"@type": "Answer",
"text": "Le diagnostic repose sur des tests biochimiques et l'analyse des métabolites lipidiques."
}
},
{
"@type": "Question",
"name": "Quels tests sont utilisés pour évaluer l'activité des lipoxygénases ?",
"position": 2,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des tests enzymatiques et des dosages de leucotriènes dans le sang sont couramment utilisés."
}
},
{
"@type": "Question",
"name": "Les tests génétiques sont-ils utiles pour les lipoxygénases ?",
"position": 3,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des tests génétiques peuvent identifier des mutations affectant l'activité des lipoxygénases."
}
},
{
"@type": "Question",
"name": "Quels symptômes peuvent indiquer un problème avec les lipoxygénases ?",
"position": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des symptômes d'inflammation chronique, comme l'asthme ou l'arthrite, peuvent survenir."
}
},
{
"@type": "Question",
"name": "Peut-on mesurer les niveaux de lipoxygénases dans le sang ?",
"position": 5,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des analyses sanguines peuvent mesurer les niveaux d'enzymes et de métabolites."
}
},
{
"@type": "Question",
"name": "Quels symptômes sont liés à une surproduction de leucotriènes ?",
"position": 6,
"acceptedAnswer": {
"@type": "Answer",
"text": "Une surproduction peut entraîner des symptômes respiratoires, comme la dyspnée et la toux."
}
},
{
"@type": "Question",
"name": "Les douleurs articulaires peuvent-elles être liées aux lipoxygénases ?",
"position": 7,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, une activité anormale des lipoxygénases peut contribuer à l'inflammation articulaire."
}
},
{
"@type": "Question",
"name": "Comment les lipoxygénases affectent-elles la peau ?",
"position": 8,
"acceptedAnswer": {
"@type": "Answer",
"text": "Elles peuvent jouer un rôle dans des affections cutanées inflammatoires comme l'eczéma."
}
},
{
"@type": "Question",
"name": "Les allergies peuvent-elles être influencées par les lipoxygénases ?",
"position": 9,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les lipoxygénases sont impliquées dans la réponse allergique et l'inflammation."
}
},
{
"@type": "Question",
"name": "Quels signes indiquent une inflammation due aux lipoxygénases ?",
"position": 10,
"acceptedAnswer": {
"@type": "Answer",
"text": "Rougeur, chaleur, gonflement et douleur sont des signes d'inflammation active."
}
},
{
"@type": "Question",
"name": "Comment prévenir les troubles liés aux lipoxygénases ?",
"position": 11,
"acceptedAnswer": {
"@type": "Answer",
"text": "Une alimentation équilibrée et riche en oméga-3 peut aider à prévenir l'inflammation."
}
},
{
"@type": "Question",
"name": "L'exercice physique influence-t-il les lipoxygénases ?",
"position": 12,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, l'exercice régulier peut réduire l'inflammation et moduler l'activité des lipoxygénases."
}
},
{
"@type": "Question",
"name": "Le stress a-t-il un impact sur les lipoxygénases ?",
"position": 13,
"acceptedAnswer": {
"@type": "Answer",
"text": "Le stress chronique peut augmenter l'inflammation et affecter l'activité des lipoxygénases."
}
},
{
"@type": "Question",
"name": "Les habitudes de vie peuvent-elles influencer les lipoxygénases ?",
"position": 14,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des habitudes de vie saines, comme éviter le tabac, peuvent réduire les risques."
}
},
{
"@type": "Question",
"name": "Les compléments alimentaires sont-ils bénéfiques pour les lipoxygénases ?",
"position": 15,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des compléments d'oméga-3 peuvent aider à réguler l'activité des lipoxygénases."
}
},
{
"@type": "Question",
"name": "Quels médicaments ciblent les lipoxygénases ?",
"position": 16,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des inhibiteurs spécifiques des lipoxygénases, comme les anti-inflammatoires, sont utilisés."
}
},
{
"@type": "Question",
"name": "Les corticostéroïdes affectent-ils l'activité des lipoxygénases ?",
"position": 17,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les corticostéroïdes peuvent réduire l'expression des lipoxygénases et l'inflammation."
}
},
{
"@type": "Question",
"name": "Comment les acides gras oméga-3 influencent-ils les lipoxygénases ?",
"position": 18,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les oméga-3 peuvent moduler l'activité des lipoxygénases et réduire l'inflammation."
}
},
{
"@type": "Question",
"name": "Les traitements naturels peuvent-ils aider avec les lipoxygénases ?",
"position": 19,
"acceptedAnswer": {
"@type": "Answer",
"text": "Certaines plantes médicinales ont des propriétés anti-inflammatoires et peuvent aider."
}
},
{
"@type": "Question",
"name": "La thérapie génique est-elle une option pour les troubles des lipoxygénases ?",
"position": 20,
"acceptedAnswer": {
"@type": "Answer",
"text": "La thérapie génique est en recherche pour corriger des mutations affectant les lipoxygénases."
}
},
{
"@type": "Question",
"name": "Quelles complications peuvent survenir avec une dysfonction des lipoxygénases ?",
"position": 21,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des complications incluent des maladies inflammatoires chroniques comme l'asthme et l'arthrite."
}
},
{
"@type": "Question",
"name": "Les maladies cardiovasculaires sont-elles liées aux lipoxygénases ?",
"position": 22,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, une activité anormale des lipoxygénases peut contribuer à l'inflammation cardiovasculaire."
}
},
{
"@type": "Question",
"name": "Les troubles respiratoires peuvent-ils être aggravés par les lipoxygénases ?",
"position": 23,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, une surproduction de leucotriènes peut aggraver des troubles respiratoires comme l'asthme."
}
},
{
"@type": "Question",
"name": "Les troubles métaboliques sont-ils associés aux lipoxygénases ?",
"position": 24,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des déséquilibres dans l'activité des lipoxygénases peuvent être liés à des troubles métaboliques."
}
},
{
"@type": "Question",
"name": "Les cancers peuvent-ils être influencés par les lipoxygénases ?",
"position": 25,
"acceptedAnswer": {
"@type": "Answer",
"text": "Certaines études suggèrent que les lipoxygénases peuvent jouer un rôle dans la progression tumorale."
}
},
{
"@type": "Question",
"name": "Quels facteurs de risque sont associés aux troubles des lipoxygénases ?",
"position": 26,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des facteurs comme l'obésité, le tabagisme et une alimentation riche en graisses saturées augmentent le risque."
}
},
{
"@type": "Question",
"name": "L'hérédité joue-t-elle un rôle dans les troubles des lipoxygénases ?",
"position": 27,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des antécédents familiaux de maladies inflammatoires peuvent augmenter le risque."
}
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{
"@type": "Question",
"name": "L'exposition à des polluants affecte-t-elle les lipoxygénases ?",
"position": 28,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, l'exposition à des polluants environnementaux peut altérer l'activité des lipoxygénases."
}
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{
"@type": "Question",
"name": "Le vieillissement influence-t-il l'activité des lipoxygénases ?",
"position": 29,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, le vieillissement peut modifier l'activité des lipoxygénases et augmenter l'inflammation."
}
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{
"@type": "Question",
"name": "Le stress oxydatif est-il un facteur de risque pour les lipoxygénases ?",
"position": 30,
"acceptedAnswer": {
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To investigate pre-, intra-, and postoperative factors influencing postoperative visual acuity, degree of metamorphopsia, and retinal sensitivity after vitrectomy in patients with rhegmatogenous retin...
We reviewed retrospectively 33 consecutive eyes of 32 patients, who underwent vitrectomy for rhegmatogenous retinal detachment with foveal detachment between August 2018 and October 2020 and obtained ...
Preoperative total retinal detachment was the only factor significantly associated with worse best-corrected visual acuity at 1-year postoperatively (β = 0.589, P<0.001). Intraoperative internal limit...
Our study findings suggest that best-corrected visual acuity, metamorphopsia, and retinal sensitivity at 1 year after vitrectomy for rhegmatogenous retinal detachment with foveal detachment are influe...
Four clinical cases of patients with rhegmatogenous retinal detachment (RRD) associated with elevated intraocular pressure (IOP) are described. All the patients were men who came to the emergency serv...
Outer retinal folds occur when outer retinal corrugations (ORCs) persist after retinal reattachment with worse functional outcomes. We investigate the pathophysiology of ORCs in vivo....
Prospective cohort study....
Patients with rhegmatogenous retinal detachment (RRD) presenting to St. Michael's Hospital, Toronto, Ontario, Canada, between August 2020 and February 2022 were assessed with swept-source optical cohe...
Sixty-six patients were included. More than half (60.6%, 40/66) were fovea-off and 48.4% (32/66) had ORCs at presentation. All eyes (32/32) with ORCs had retinal pigment epithelium (RPE)-photoreceptor...
ORCs develop with (1) acute exposure of subretinal space to liquified vitreous, (2) for >2 days, that (3) overwhelms RPE capacity, leading to progressive and extensive RRD. Mathematical models suggest...
The aim of this study was to determine symptom-level risk factors for retinal tear/retinal detachment (RT/RD) in our patients presenting with symptoms of posterior vitreous detachment (PVD)....
We conducted a prospective cohort study of patients presenting to outpatient ophthalmology clinics at a single academic institution with complaint(s) of flashes, floaters, and/or subjective field loss...
We recruited 237 patients (age 20-93 years) from March 2018 to March 2019. The most common diagnosis was PVD (141, 59.5%), followed by vitreous syneresis (38, 16.0%) and RT/RD (34, 14.3%). Of those wi...
While well-known demographic and exam-based risk factors for RT/RD exist in patients with PVD symptoms, the relative importance of symptom characteristics is less clear. We found that the presence of ...
Giant retinal tear-associated rhegmatogenous retinal detachment (GRT-RRD) presents a significant surgical challenge. Trauma stands out as one of the risk factors. This retrospective case series aims t...
To investigate hyperreflective dots (HRDs) on baseline OCT in rhegmatogenous retinal detachment (RRD)....
Retrospective cohort study....
Consecutive primary fovea-off RRDs presenting between January 2012 and September 2022....
Visual acuity (VA) was obtained at baseline, 3, 6, and 12 months. Baseline foveal OCT scans were graded for the presence of HRDs in the outer retina, morphologic stage of RRD in the parafovea, and fov...
The primary outcome was the proportion of patients in each morphologic stage with HRDs present on OCT and their association with postoperative VA. Secondary outcomes included association with the heig...
A total of 351 patients were included. The presence of HRDs by morphologic stage of RRD was 0% in stage 1, 4.5% (2/42) in stage 2, 13% (7/54) in stage 3a, 16% (20/126) in stage 3b, 48% (40/83) in stag...
Hyperreflective dots have been hypothesized to consist of intraretinal inflammatory cells. We found that HRDs were significantly associated with the morphologic stage, extent, duration, and height of ...
The author(s) have no proprietary or commercial interest in any materials discussed in this article....
To investigate the effect of isovolumetric and expansile gas tamponade concentrations on single surgery anatomical success (SSAS) and day 1 intraocular pressure (IOPD1) following pars plana vitrectomy...
We conducted a single-centre retrospective continuous and comparative study on eyes that had undergone small-gauge PPV using isovolumetric versus expansile gas for PRD repair between 2011 and 2020 at ...
From 456 eyes, PSM analysis matched 240 eyes with 120 in each group. The median (interquartile range) follow-up was 96 (59 to 218) days. The SSAS was 229/240 (95.8%) overall; 115/120 (95.8%) and 114/1...
Expansile gas concentration does not impact SSAS but is associated with significantly raised IOPD1 with no reduction in hypotony rates following PPV for primary PRD....
Rhegmatogenous retinal detachment (RRD) is the most common form of retinal detachment (RD), affecting 1 in 10,000 patients per year. The condition has significant ocular morbidity, with a sizeable pro...
To present a rare case of ocular involvement in a child with Frank-ter Haar syndrome (FTHS) presenting retinal detachment....
Detailed ophthalmological evaluation including examination under general anesthesia, ocular ultrasound, and visual evoked potential testing was completed. Photographic documentation of the physical fi...
A 3-year-old female patient with FTHS was referred to evaluate for possible ophthalmic involvement. The patient presented with the classical dysmorphic abnormalities of the syndrome. Ophthalmologic ev...
FTHS is associated with multiple ocular involvement such as megalocornea, congenital glaucoma, or colobomas. This case report is the first to describe a high, against-the-rule astigmatism and retinal ...
The management of rhegmatogenous retinal detachment has rapidly evolved over recent decades. A range of surgical techniques exist, all of which can achieve retinal reattachment in most cases. In recen...