Perte de poids sous inhibiteurs de tyrosine kinases dans le cancer thyroïdien : rôle de la PTH ?

2020 ◽  
Vol 81 (4) ◽  
pp. 219-220
Author(s):  
V. Suteau ◽  
C. De La Fouchardière ◽  
F. Illouz ◽  
A. Hamy ◽  
J. Young ◽  
...  
Keyword(s):  
Tyrosine Kinases ◽  
Perte De Poids

The ligands VEGF-A/D and PDGF-A but not the tyrosine kinases receptors are associated with progressed gastic cancer

2010 ◽  
Vol 48 (08) ◽  
Author(s):  
C Schimanski ◽  
M Möhler ◽  
M Jordan ◽  
F Schlaegel ◽  
H Lang ◽  
...  
Keyword(s):  
Tyrosine Kinases

Naturally Occurring Homoisoflavonoids as Potent Protein Tyrosine Kinases Inhibitors

Planta Medica ◽  
2008 ◽  
Vol 74 (03) ◽  
Author(s):  
Y Ye ◽  
LG Lin ◽  
H Xie ◽  
HL Li ◽  
HL Jiang ◽  
...  
Keyword(s):  
Tyrosine Kinases ◽  
Protein Tyrosine Kinases ◽  
Protein Tyrosine ◽  
Naturally Occurring

SHCA PHOSPHOTYROSINE DERIVED SIGNALING IS REQUIRED FOR THE MAINTENANCE OF CARDIAC FUNCTION

2008 ◽  
Vol 31 (4) ◽  
pp. 23
Author(s):  
Rachel Vanderlaan ◽  
Rod Hardy ◽  
Golam Kabir ◽  
Peter Back ◽  
A J Pawson
Keyword(s):  
Extracellular Matrix ◽  
Cardiac Function ◽  
Tyrosine Kinases ◽  
Sh2 Domain ◽  
Scaffolding Protein ◽  
Restricted Domain ◽  
Downstream Signaling ◽  
Matrix Interactions ◽  
Extracellular Matrix Interactions ◽  
Ptb Domain

Background: ShcA, a scaffolding protein, generates signalspecificity by docking to activated tyrosine kinases through distinct phosphotyrosine recognition motifs, while mediating signal complexity through formation of diverse downstream phosphotyrosine complexes. Mammalian ShcA encodes 3 isoforms having a modular architecture of a PTB domain and SH2 domain, separated by a CH1 region containing tyrosine phosphorylation sites important in Ras-MAPK activation. Objective and Methods: ShcA has a necessary role in cardiovascular development^1,2. However, the role of ShcA in the adult myocardium is largely unknown, also unclear, is how ShcA uses its signaling modules to mediate downstream signaling. To this end, cre/loxP technology was employed to generate a conditional ShcA allele series. The myocardial specific ShcA KO (ShcA CKO) and myocardial restricted domain mutant KI mice were generated using cre expressed from the mlc2v locus^3 coupled with the ShcA floxed allele and in combination with the individual ShcA domain mutant KI alleles^2. Results: ShcACKO mice develop a dilated cardiomyopathy phenotype by 3 months of life, typified by depressed cardiac function and enlarged chamber dimensions. Isolated cardiomyocytes from ShcA CKO mice have preserved contractility indicating an uncoupling between global heart function and single myocyte contractile mechanics. Force-length experiments suggest that the loss of shcAmediates the uncoupling through deregulation of extracellular matrix interactions. Subsequent, analysis of the ShcA myocardial restricted domain mutant KImice suggests that ShcA requires PTB domain docking to upstream tyrosine kinases and subsequent phosphorylation of the CH1 tyrosines important for downstream signaling. Conclusion: ShcA is required for proper maintenance of cardiac function, possibly regulation of extracellular matrix interactions. References: 1. Lai KV, Pawson AJ. The ShcA phosphotyrosine docking protein sensitizescardiovascular signaling in the mouse embryo. Genes and Dev 2000;14:1132-45. 2. Hardy WR. et al. Combinatorial ShcA docking interactions supportdiversity in tissue morphogenesis. Science2007;317:251-6. 3.Minamisawa, s. et al. A post-transcriptional compensatory pathway inheterozygous ventricular myosin light chain 2-deficient mice results in lack ofgene dosage effect during normal cardiac growth or hypertrophy. J Biol Chem 1999;274:10066-70.

Lipœdème

Obésité ◽  
2019 ◽  
Vol 14 (3) ◽  
pp. 124-130
Author(s):  
S. Vignes
Keyword(s):  
Qualité De Vie ◽  
Prise En Charge ◽  
Tissu Adipeux ◽  
Recherche Clinique ◽  
Soutien Psychologique ◽  
Perte De Poids ◽  
Activités Physiques

Le lipœdème est une entité clinique mal connue, dont la prévalence est inconnue et qui est souvent confondue avec un lymphœdème. Il s’agit d’une répartition anormale du tissu adipeux, également pathologique, allant des hanches jusqu’aux chevilles en respectant les pieds. Il touche presque exclusivement les femmes obèses et débute généralement vers la puberté. Il s’accompagne de douleurs spontanées cutanées ou lors d’une stimulation modérée (pression, pincement), d’ecchymoses spontanées et d’œdèmes après orthostatisme prolongé. Le retentissement sur l’image corporelle et sur la qualité de vie est très important. Les examens complémentaires (scanner, IRM, lymphoscintigraphie) peuvent être utiles en cas de doute diagnostique ou pour confirmer le lipœdème. Après une longue évolution, le système lymphatique est atteint avec l’apparition d’un lipolymphœdème touchant alors le dos du pied et pouvant se compliquer d’érysipèle. La prise en charge n’est pas codifiée et comprend une perte de poids (qui améliore peu la morphologie des membres inférieurs), un soutien psychologique, la compression élastique, souvent mal tolérée et les activités physiques, en particulier en milieu aquatique. La liposuccion par tumescence réduit le volume, les douleurs spontanées et provoquées, les ecchymoses spontanées, et améliore l’apparence mais aussi la qualité de vie. La poursuite de la recherche clinique et physiopathologique du lipœdème est nécessaire pour pouvoir prendre en charge les femmes qui en sont atteintes.

Industrialisation et obésité en 2019

Obésité ◽  
2019 ◽  
Vol 14 (3) ◽  
pp. 111-118
Author(s):  
J. Dargent
Keyword(s):  
Perte De Poids

L’obésité peut être analysée sous l’angle de la production industrielle, dans sa survenue, aujourd’hui qualifiée d’épidémique, et aussi dans les moyens à notre disposition pour la combattre. Le but de cet article est d’examiner si ces deux approches sont équivalentes. Les déterminants industriels qui amènent un développement sans précédent de cette maladie sont bien identifiés et s’avèrent difficiles à contrecarrer, quel que soit le niveau de développement des pays concernés. Au stade de l’obésité installée, la chirurgie est aujourd’hui le moyen le plus spectaculaire pour obtenir une perte de poids majeure, mais elle obéit également à une logique productiviste. Seules des stratégies coordonnées et collaboratives pourraient prétendre à l’efficacité.

Receptor tyrosine kinase gene amplification is predictive of intraoperative seizures during glioma resection with functional mapping

2020 ◽  
Vol 132 (4) ◽  
pp. 1017-1023 ◽  
Author(s):  
Bryan D. Choi ◽  
Daniel K. Lee ◽  
Jimmy C. Yang ◽  
Caroline M. Ayinon ◽  
Christine K. Lee ◽  
...  
Keyword(s):  
Tyrosine Kinases ◽  
Univariate Analysis ◽  
Tumor Resection ◽  
Tumor Grade ◽  
Molecular Data ◽  
Genetic Alterations ◽  
Functional Mapping ◽  
Chi Square ◽  
Kinase Gene ◽  
Glioma Resection

OBJECTIVEIntraoperative seizures during craniotomy with functional mapping is a common complication that impedes optimal tumor resection and results in significant morbidity. The relationship between genetic mutations in gliomas and the incidence of intraoperative seizures has not been well characterized. Here, the authors performed a retrospective study of patients treated at their institution over the last 12 years to determine whether molecular data can be used to predict the incidence of this complication.METHODSThe authors queried their institutional database for patients with brain tumors who underwent resection with intraoperative functional mapping between 2005 and 2017. Basic clinicopathological characteristics, including the status of the following genes, were recorded: IDH1/2, PIK3CA, BRAF, KRAS, AKT1, EGFR, PDGFRA, MET, MGMT, and 1p/19q. Relationships between gene alterations and intraoperative seizures were evaluated using chi-square and two-sample t-test univariate analysis. When considering multiple predictive factors, a logistic multivariate approach was taken.RESULTSOverall, 416 patients met criteria for inclusion; of these patients, 98 (24%) experienced an intraoperative seizure. Patients with a history of preoperative seizure and those treated with antiepileptic drugs prior to surgery were less likely to have intraoperative seizures (history: OR 0.61 [95% CI 0.38–0.96], chi-square = 4.65, p = 0.03; AED load: OR 0.46 [95% CI 0.26–0.80], chi-square = 7.64, p = 0.01). In a univariate analysis of genetic markers, amplification of genes encoding receptor tyrosine kinases (RTKs) was specifically identified as a positive predictor of seizures (OR 5.47 [95% CI 1.22–24.47], chi-square = 5.98, p = 0.01). In multivariate analyses considering RTK status, AED use, and either 2007 WHO tumor grade or modern 2016 WHO tumor groups, the authors found that amplification of the RTK proto-oncogene, MET, was most predictive of intraoperative seizure (p < 0.05).CONCLUSIONSThis study describes a previously unreported association between genetic alterations in RTKs and the occurrence of intraoperative seizures during glioma resection with functional mapping. Future models estimating intraoperative seizure risk may be enhanced by inclusion of genetic criteria.

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