Academic literature on the topic 'TEP [18F]MPPF'
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Journal articles on the topic "TEP [18F]MPPF":
Evans, Bill. "How I Survived My Dance Training: Rhythm, Tap, and Modern Dance." Medical Problems of Performing Artists 18, no. 4 (December 1, 2003): 137–40. http://dx.doi.org/10.21091/mppa.2003.4024.
Dissertations / Theses on the topic "TEP [18F]MPPF":
Didelot, Adrien. "Étude par la TEP au [18F]MPPF des récepteurs cérébraux sérotoninergiques 5-HT1A dans l’épilepsie du lobe temporal." Thesis, Lyon 1, 2010. http://www.theses.fr/2010LYO10104/document.
In patients suffering from epilepsy, no neuroimaging method has proved able to delineate the epileptogenic zone (EZ), which is defined by the area of cortex required to generate the epileptic seizures. About one third of patient suffering from temporal lobe epilepsies (TLE) are not seizure free after surgery after removal of the cortical area supposed to included the EZ according to the presurgical evaluation. Data from previous studies carried out in our departement suggested that decreases of the [18F]MPPF binding potential (BPND) correlated, at the group level, with cortical epileptogenicity. Our aim was to validate the relevance of [18F]MPPF PET at the individual level for identifying the EZ in TLE. In a first study, the [18F]MPPF PET of 42 patients suffering from TLE were visually and statistically analyzed and compared with [18F]FDG PET, which were performed in the same group of patients during their presurgical evaluation. In a second study, we developed a voxel based analysis of asymmetry index (AI) of [18F]MPPF binding and compared the sensibility and specificity of this method to those of conventional SPM analysis of [18F]MPPF PET data. This second study was carried out in 24 patients, who have been operated and remained seizure-free after surgery. Two statistical thresholds (p< 0.05 corrected at the voxel level and p< 0.05 corrected at the cluster level) were used for each method. In a last study, the correlation between the depressive symptoms and the BPND of [18F]MPPF was studied in 24 patients suffering from TLE. These three studies lead to the following conclusions: i) [18F]MPPF PET is more performant than [18F]FDG PET for identifying the epileptogenic lobe in patients suffering from TLE, ii) AI analysis with a statistical threshold of p< 0.05 corrected at the cluster is the method of analysis of [18F]MPPF PET that allowed EZ identification with the best sensitivity [96%] and specificity [88%] in TLE, iii) at the group level, depressive symptoms positively correlate with an increase of the BPND of [18F]MPPF BPND within the raphe nuclei and the insula controlateral to the EZ
Didelot, Adrien. "Étude par la TEP au [18F]MPPF des récepteurs cérébraux sérotoninergiques 5-HT1A dans l'épilepsie du lobe temporal." Phd thesis, Université Claude Bernard - Lyon I, 2010. http://tel.archives-ouvertes.fr/tel-00705810.
Verdurand, Mathieu. "Vers l'imagerie TEP de la neurotransmission sérotoninergique dans la maladie d'Alzheimer : du radiotraceur au modèle animal." Phd thesis, Université Claude Bernard - Lyon I, 2008. http://tel.archives-ouvertes.fr/tel-00348975.
Une première partie, méthodologique, a consisté à automatiser et à optimiser la radiosynthèse du [11C]PIB, un radiotraceur pouvant détecter l'accumulation des peptides amyloïdes dans le cerveau de patients atteints de la MA.
Dans une seconde partie, nous nous sommes intéressés à l'imagerie TEP de la neurotransmission sérotoninergique. Les antagonistes des récepteurs 5-HT6 ont démontré des propriétés procognitives et des études post-mortem ont montrées leur modification dans la MA. Cependant, aucun centre ne dispose encore d'un radiotraceur spécifique. Nous rapportons l'évaluation biologique d'un radiotraceur antagoniste des 5-HT6, le [18F]12ST05. D'autre part, une étude récente en imagerie TEP au [18F]MPPF, un antagoniste des récepteurs 5-HT1A, a révélé une diminution de sa fixation chez des patients Alzheimer alors qu'une augmentation pouvait être constatée chez des patients MCI. Nous sommes parvenus à reproduire une surexpression transitoire des 5-HT1A dans un modèle animal de la MA et nous proposons différents mécanismes compensatoires à l'origine de cette augmentation. Ces résultats apportent des hypothèses sur la nature des phénomènes compensatoires précoces stimulés et pourraient avoir des conséquences sur les thérapeutiques ciblant les 5-HT1A.
Lerond, Jérôme. "Système sérotoninergique 5-HT1A et schizophrénie : étude par tomographie par émission de positons au p-[18F]MPPF chez des patients schizophrènes traités par antipsychotiques." Thesis, Nancy 1, 2011. http://www.theses.fr/2011NAN10152/document.
Backgrounds: Multiple post-mortem and pharmacological studies suggest a key role of the serotonergic 1A (5-HT1A) system in the pathophysiology of schizophrenia. Materials and methods: The aim of our work was to assess the 5-HT1A receptors availability In patients suffering from schizophrenia treated with different antipsychotic drugs, compared to controls, using a new ligand antagonist of 5-HT1A receptors, the [18F]MPPF. The 5-HT1A binding potential of 19 schizophrenic patients (treated with either aripiprazole (a 5-HT1A partial agonist) or Second Generation Antipsychotic (olanzapine or risperidone) was compared with that of 19 age-matched healthy controls. This is the first report of a [18F]MPPF PET study in treated patients with schizophrenia. Results: A significant reduction of [18F]MPPF BPND was found in treated patients with schizophrenia compared to age- and gender-matched healthy subjects. These modifications were mainly localized in the frontal and orbitofrontal cortex and may reflect either the pathophysiology of schizophrenia or medication effects. In comparison to matched healthy subjects, the reduction of 5-HT1A receptor availability was more extensive in schizophrenic patients with aripiprazole treatment than in schizophrenic patients with SGA treatment. Conclusion: These results suggest that aripiprazole has a major impact on [18F]MPPF BPND, likely due to its partial agonist activity at 5-HT1A receptors. In order to distinguish the relative contributions of the disease itself versus medication effects, future [18F]MPPF studies should be performed in APD-naïve patients with schizophrenia
Costes, Nicolas. "Neurotransmission sérotoninergique 5-HT1A : approche méthodologique de la mesure in vivo par le [18F]MPPF en tomographie par émission de positons." Phd thesis, Université Claude Bernard - Lyon I, 2007. http://tel.archives-ouvertes.fr/tel-00180894.
Les travaux contenus dans cette thèse comprennent : i/ une expérience de modélisation compartimentale des échanges in vivo entre le ligand et son récepteur soutenue par une étude chez un échantillon réduit d'hommes sains dans un protocole TEP multi-injection de [18F]MPPF, ii/ la recherche et la validation d'un protocole de modélisation simplifiée grâce à la connaissance du modèle complexe élaboré dans l'expérimentation multi-injection, iii/ la réalisation d'une base de données normative du marquage des récepteur 5HT1A par le [18F]MPPF dans le cas sain, chez les hommes et les femmes au cours de la vie adulte, IV/ la réalisation d'un étude TEP test-retest pour la connaissance de la reproductibilité de la mesure au [18F]MPPF, V/ la constitution d'une base de données simulées par la méthode de Monte-Carlo pour le développement et la validation des outils de correction et d'exploitation de la mesure quantitative de la fixation du traceur.
La base simulée est utilisée pour la mise au point de méthodes de correction (effet de volume partiel) ou de détection (libération de sérotonine endogène).
L'application des travaux expérimentaux est exposée dans le contexte d'une utilisation de cette mesure quantitative à l'usage de la recherche clinique.
Ce travail constitue une phase importante dans le développement d'un traceur : il se situe à l'interface entre les expérimentations biologiques sur l'animal et l'utilisation du traceur TEP dans un examen chez l'Homme.
Merabet, Zennadi Manel. "Évaluation de la place de l'imagerie cérébrale morphologique et métabolique dans le phénotypage diagnostique et thérapeutique des TCA." Electronic Thesis or Diss., Saint-Etienne, 2023. http://www.theses.fr/2023STET0061.
The most common eating disorders are anorexia nervosa and bulimia nervosa; they represent a serious public health problem with significant physical and psychological consequences. In the context of emerging precision medicine, various fields are increasingly turning to patient phenotyping to improve treatment and personalize healthcare. This research has focused on bulimia nervosa and anorexia nervosa, aiming to define the role of metabolic and morphological brain imaging in their therapeutic and prognostic pathways. Aims : Analyze the link between cerebral serotonergic activity and the efficacy of fluoxetine in bulimia nervosa ; Analyze the relationship between the morphology and function of the pituitary gland in anorexia nervosa ; Creation of an MRI atlas of the pituitary gland. We used positron emission tomography with the radioligand [18F]MPPF to analyze cerebral serotonergic activity in bulimia nervosa, and correlations with the response to fluoxetine, as well as voxel-wise analyses, were performed using SPM. For the study of pituitary gland morphology in anorexia nervosa, we manually delineated anterior and posterior lobes of the gland and conducted correlations with pituitary hormones. From pituitary delineations in control women, we created an optimized MRI atlas using a "lesion cost masking" approach with SPM. We found a negative correlation between BPND [18F]MPPF in the dorsal raphe nucleus (before fluoxetine) and the response to fluoxetine in bulimia nervosa. Significant differences in BPND [18F]MPPF were also observed before and after fluoxetine treatment in limbic regions among responders but not in non-responders. In anorexia nervosa, a correlation was found between the volume of the anterior pituitary and growth hormone. The MRI atlas of the global, anterior, and posterior pituitary showed good concordance and correlation with manual delineations. In the field of eating disorders, both metabolic and morphological brain imaging undoubtedly play a significant role. It helps unravel mysteries still surrounding the pathophysiology of these disorders. Our results also suggest the dorsal raphe nucleus activity as a biomarker for fluoxetine response in bulimia nervosa. As for pituitary volume, it appears to be a good marker of disease severity. Our pituitary atlas aims to eliminate manual delineations, providing a significant time-saving advantage in clinical research