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Dive into the research topics where Jean François Oury is active.

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Featured researches published by Jean François Oury.


Cell Transplantation | 2010

In vitro and in vivo analysis of endothelial progenitor cells from cryopreserved umbilical cord blood: are we ready for clinical application?

Valérie Vanneaux; Fida El-Ayoubi; Catherine Delmau; Catherine Driancourt; Séverine Lecourt; Aurore Grelier; Audrey Cras; Wendy Cuccuini; Jean Soulier; Jean-Jacques Lataillade; Marie-Caroline Lebousse-Kerdiles; Jean François Oury; Olivier Sibony; Jean-Pierre Marolleau; Marc Benbunan; Georges Uzan; Jérôme Larghero

Umbilical cord blood (CB) represents a main source of circulating endothelial progenitor cells (cEPCs). In view of their clinical use, in either the autologous or allogeneic setting, cEPCs should likely be expanded from CB kept frozen in CB banks. In this study, we compared the expansion, functional features, senescence pattern over culture, and in vivo angiogenic potential of cEPCs isolated from fresh or cryopreserved CB (cryoCB). cEPCs could be isolated in only 59% of cryoCB compared to 94% for fresh CB, while CB units were matched in terms of initial volume, nucleated and CD34+ cell number. Moreover, the number of endothelial colony-forming cells was significantly decreased when using cryoCB. Once cEPCs culture was established, the proliferation, migration, tube formation, and acetylated-LDL uptake potentials were similar in both groups. In addition, cEPCs derived from cryoCB displayed the same senescence status and telomeres length as that of cEPCs derived from fresh CB. Karyotypic aberrations were found in cells obtained from both fresh and cryoCB. In vivo, in a hind limb ischemia murine model, cEPCs from fresh and cryoCB were equally efficient to induce neovascularization. Thus, cEPCs isolated from cryoCB exhibited similar properties to those of fresh CB in vitro and in vivo. However, the low frequency of cEPCs colony formation after cryopreservation shed light on the need for specific freezing conditions adapted to cEPCs in view of their future clinical use.


Fetal Diagnosis and Therapy | 2006

Elevated interferon-alpha in fetal blood in the prenatal diagnosis of Aicardi-Goutières syndrome.

Carole Desanges; Pierre Lebon; Clarisse Bauman; Edith Vuillard; Catherine Garel; Alain Cordesse; Jean François Oury; Yanick J. Crow; Dominique Luton

A case of Aicardi-Goutières syndrome is described in a family with index cases. The diagnosis was made prenatally based on high fetal blood concentration of interferon alpha. The biological measurement could be of interest for further diagnosis of other cases.


American Journal of Medical Genetics Part A | 2009

Giant diencephalic harmartoma and related anomalies: a newly recognized entity distinct from the Pallister-Hall syndrome.

Fabien Guimiot; Pascale Marcorelles; Azzedine Aboura; Georges Bonyhay; Sophie Patrier; Françoise Menez; Valérie Drouin-Garraud; Valentine Icowick; Daniele Eurin; Catherine Garel; Hélène Moirot; Eric Verspyck; Pascale Saugier-Veber; Tania Attié-Bitach; Olivier Picone; Jean François Oury; Alain Verloes; Anne Lise Delezoide; Pr. Annie Laquerrière

An hypothalamic hamartoma is an abnormal mass of mature glio‐neuronal tissue present in the hypothalamic area. It usually measures <2 cm of diameter. Most of the time, this hamartoma occurs in Pallister–Hall syndrome (PHS), due to heterozygous GLI3 mutations. We report on five fetuses with giant diencephalic hamartoma and other midline brain and facial malformations, without mutation in the GLI3 gene or genomic rearrangements in three of them. The fetuses showed facial asymmetry, unilateral ear and eye anomalies, and facial cleft. Extracephalic malformations consisted of vertebral anomalies and short nails, without polydactyly and cardiac malformation. The diencephalon was replaced by an encephaloid mass protruding into the facial cleft. Normal cerebral structures were not detectable. In one patient, holoprosencephaly of the syntelencephalic type was noted. Arhinencephaly was present in all patients. Histologically, the ill‐defined, multilobulated lesion was made of neuroblastic and neurocytic cell foci, lying in a fibrillar network, elaborating sometimes perivascular pseudorosettes, with a maturation gradient in accordance with the fetal age. Owing to their location, the tumors could be described as diencephalic, rather than hypothalamic hamartomas. The striking asymmetry of the facial anomalies and the diencephalic malformations are not in the spectrum observed with PHS and related syndromes, suggesting a distinct entity involving abnormal morphogenetic developmental fields at around 5 weeks of gestation.


American Journal of Perinatology Reports | 2014

Cloaca in discordant monoamniotic twins: prenatal diagnosis and consequence for fetal lung development.

Yvon Chitrit; Edith Vuillard; Sunavy Khung; Nadia Belarbi; Fabien Guimiot; Françoise Muller; Alaa El Ghoneimi; Jean François Oury

Objective Describe a case of cloaca prenatally diagnosed in one of a set of monoamniotic twins. Study Design Retrospective review of a case. Results Cloaca is one of the most complex and severe degrees of anorectal malformations in girls. We present a discordant cloaca in monoamniotic twins. Fetal ultrasound showed a female fetus with a pelvic midline cystic mass, a phallus-like structure, a probable anorectal atresia with absence of anal dimple and a flat perineum, and renal anomalies. The diagnosis was confirmed by fetal magnetic resonance imaging postnatally. Conclusions The rarity of the malformation in a monoamniotic pregnancy, the difficulties of prenatal diagnosis, the pathogenic assumptions, and the consequences of adequate amniotic fluid for fetal lung development are discussed.


Journal De Radiologie | 2007

Ventriculomegalies fœtales isolees et moderees : apport de l’imagerie ante et post-natale dans l’evaluation du pronostic neurologique

C. Falip; N. Blanc; I. Zaccaria; E. Maes; Jean François Oury; Guy Sebag; Catherine Garel

Objectifs Preciser l’apport de l’imagerie dans l’evaluation du pronostic neurologique des ventriculomegalies fœtales isolees et moderees. Materiels et methodes Il s’agit d’une etude prospective dont les criteres d’inclusion sont les suivants: diagnostic antenatal de dilatation ventriculaire cerebrale moderee et isolee, caryotype fœtal normal, virologie du liquide amniotique negative (PCR CMV) et IRM fœtale normale (en dehors de la ventriculomegalie). En post-natal les enfants issus de ces grossesses ont beneficie d’un suivi clinique regulier, de tests psychometriques et d’examens d’imagerie tels que l’echographie transfontanellaire et surtout l’IRM cerebrale. Resultats Sur 101 enfants inclus, 9 ont ete perdus de vue. Parmi les 92 enfants suivis, 9 (9,7 %) ont presente une pathologie neurologique averee. Soixante seize enfants ont eu au moins une IRM cerebrale post-natale, dans 76 % des cas (58) elle a confirme la dilatation ventriculaire. Parmi ces 58 enfants, 14 (24 %) ont presente des anomalies de signal de la substance blanche periventriculaire non decelees en antenatal. Celles-ci sont clairement correlees a un pronostic neurologique pejoratif. Conclusion Meme quand tous les elements du bilan prenatal (IRM fœtale, caryotype et virologie) confirment le caractere isole d’une ventriculomegalie fœtale, il persiste un risque, de 10 % selon notre etude, que l’enfant a venir presente des anomalies neurologiques.


Journal De Radiologie | 2005

Interet de l’IRM dans l’etude de la pathologie digestive fœtale

Catherine Garel; Pascale Philippe-Chomette; Edith Vuillard; Jean François Oury; Guy Sebag

Objectifs Etudier l’apport de l’IRM dans la pathologie digestive fœtale. Materiels et methodes Une IRM a ete realisee (terme moyen = 32 SA) chez 24 fœtus suspects en echographie de pathologie digestive. Le siege, le signal du segment digestif pathologique et la presence de grele sain ont ete precises. Les resultats ont ete correles aux donnees cliniques post-natales (n = 22) ou a l’examen fœtopathologique (n = 2). Resultats Jonction duodenojejunale (n = 5) : le grele d’aval est bien vu dans 3 stenoses isolees, non vu dans une atresie isolee et une necrose du grele et tres peu vu dans une atresie associee du grele. Grele (n = 12) : le signal des anses dilatees n’est pas correle au siege de l’obstacle. L’IRM a diagnostique une duplication et un kyste meconial et a manque 2 volvulus, 3 atresies multiples et 1 apple peel. Colon, rectum (n = 9) : IRM normale dans 2 cas d’echostructure colique anormale. Une duplication rectale et 5 microcolons ont ete observes (2 avec megavessie, 3 avec atresie du grele). Le diagnostic de malformation anorectale avec fistule recto-urinaire a ete fait 1 fois (large fistule) et manque 2 fois (petite fistule). Conclusion L’IRM permet d’affirmer la normalite du tube digestif, de voir un microcolon mais est peu sensible pour diagnostiquer des obstacles multiples ou un volvulus, pour preciser le siege d’un obstacle du grele et pour voir des petites fistules recto-urinaires.


Journal De Radiologie | 2004

Apport de l’imagerie (echographie, IRM) dans le suivi antenatal des dilatations ventriculaires moderees et isolees

Catherine Garel; J. Ouahba; Edith Vuillard; P. Gressens; A.-L. Delezoide; D. Luton; Jean François Oury; Guy Sebag

Objectifs Preciser l’apport de l’echographie et de l’IRM antenatale dans le suivi des dilatations ventriculaires (DV) isolees et moderees. La presence d’anomalies associees a la DV en greve le pronostic. Materiels et methodes Etude retrospective et prospective sur 154 fœtus chez lesquels la premiere echographie pathologique (a 26,9 + 4,56 SA, mediane : 26 SA) a retrouve une DV isolee et moderee (10 - 15 mm), uni ou bilaterale, symetrique ou non. Cent onze IRM fœtales ont ete realisees a 32,46 + 2,66 SA (mediane : 32 SA). 18 interruptions de grossesse (IMG) ont ete proposees, 13 realisees avec correlations fœtopathologiques. Resultats L’IRM a montre des anomalies periventriculaires (6,4 %) et d’autres anomalies cerebrales dans 11,8 % des cas ; ces anomalies n’etaient pas vues a l’echographie initiale. L’echographie lors du suivi a retrouve des anomalies intra-cerebrales (4,54 %) ou extra-cerebrales (11,69 %). Les dilatations bilaterales et asymetriques ont ete observees dans 10,4 % de la population etudiee et dans 50 % de la population pour laquelle une IMG a ete proposee. Conclusion Le suivi echographique des fœtus presentant une DV initialement isolee et moderee permet de rechercher des anomalies cerebrales ou extra-cerebrales d’apparition secondaire. L’IRM fœtale est un complement indispensable puisqu’elle conduit a depister des anomalies cerebrales non vues par l’echographie dans 13,6 % des cas.


Pediatric Radiology | 2007

Postnatal clinical and imaging follow-up of infants with prenatal isolated mild ventriculomegaly: a series of 101 cases

Céline Falip; Nathalie Blanc; Emmanuelle Maes; Isabelle Zaccaria; Jean François Oury; Guy Sebag; Catherine Garel


Archives De Pediatrie | 2011

Amniocentèse devant un signe d’appel échographique urinaire isolé, quelles indications ?

M. Gérard; S. Le Garrec; Andrée Delahaye; A. Bekmezian; Anne Lise Delezoide; Edith Vuillard; Georges Deschênes; A. El-Ghomeimi; Brigitte Benzacken; Jean François Oury


Journal De Radiologie | 2005

Interet de lIRM dans letude de la pathologie digestive ftale

Catherine Garel; Pascale Philippe-Chomette; Edith Vuillard; Jean François Oury; Guy Sebag

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Georges Deschênes

Necker-Enfants Malades Hospital

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Jean-Pierre Marolleau

University of Picardie Jules Verne

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