Daniel Loïc Pouliquen

Dr. Daniel Loïc Pouliquen

UMR INSERM 1307/ CNRS 6075, CRCI2NA, Nantes, Pays de la Loire, France
orcid

Research Focus & Metrics

Academic Career Length

38Years (1989-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 1996 in Journal of Microencapsulation
Verified
Journal Article
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CCC. Chouly
C. Chouly
Daniel Loïc PouliquenDaniel Loïc Pouliquen
Daniel Loïc Pouliquen
ILI. Lucet
I. Lucet
JJJ. J. Jeune
J. J. Jeune
PJP. Jallet
P. Jallet
Twelve superparamagnetic Magnetite-Dextran (MD) nanoparticles potentially useful as contrast agents for Magnetic Resonance Imaging (MRI), with different sizes, charges and surface natures, were produced and internally labelled with 59Fe in order to investigate the effect of their physicochemical properties on their biodistribution in mice. In a first step, neutral MD particles of a size 33–90·6 nm were studied. Next, the influence of charge was investigated with negative and positive particles (MDL, MDD, MDDEAE). The former (−25, −30 mV) were small, around 30 nm in size whereas the latter (+ 20 mV) were larger (104 nm). The effect of surface nature was evaluated using MD particles coated with polyoxyethylene—polyoxypropylene copolymers (Synperonic®): these MDP particles were neutral and larger in size (65·9–76·4 nm). Experiments showed that 20 min post-injection (2 mg Fe/kg), liver uptake was enhanced when the mean diameter increased: 22% for the smallest and 42% for the largest. It was up to 3 × lower for electrically neutral particles than for charged particles. Coated particles presented higher vascular persistence. The diagnostic potential for liver, lymph node or vascular imaging were discussed.

1 January 1991 in Magnetic Resonance Imaging
Verified
Journal Article
Closed access
Daniel Loïc PouliquenDaniel Loïc Pouliquen
Daniel Loïc Pouliquen
JJJ.J. Le Jeune
J.J. Le Jeune
RPR. Perdrisot
R. Perdrisot
AEA. Ermias
A. Ermias
PJP. Jallet
P. Jallet

26 June 2001 in Journal of Magnetic Resonance Imaging
Verified
Journal Article
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PDF file
ATAkihiro Tanimoto
Akihiro Tanimoto
KOKoichi Oshio
Koichi Oshio
Makoto SuematsuMakoto Suematsu
Makoto Suematsu
Daniel Loïc PouliquenDaniel Loïc Pouliquen
Daniel Loïc Pouliquen
DSDavid D. Stark
David D. Stark
Relations between spatial distribution of superparamagnetic iron oxide (SPIO) particles and the image contrast caused by SPIO were investigated. Actual clustering pattern of particles was measured in the liver and spleen of animals using intravital laser confocal microscopy. SPIO‐doped phantoms with and without Sephadex beads were made to simulate these patterns, and relaxation parameters were measured using a 1.5‐T clinical scanner. Finally, these results were compared to clinical image data using SPIO particulate agent. Intravital microscopy indicated that the clustering of latex beads was more predominant in hepatic Kupffer cells than in splenic macrophages (P < 0.001). Phantoms without Sephadex beads showed an approximately linear increase of 1/T1 (R1), 1/T2 (R2) and 1/T2* (R2*) values with increasing SPIO concentration. However, with Sephadex beads, R1 and R2 showed little change with increasing SPIO concentration, while R2* showed the same linear increase with SPIO. Also, the R2* values were higher with Sephadex beads. These results were consistent with the clinical imaging data, where signal reduction was significantly smaller in the spleen (‐0.4% ± 27.4%) than in the liver (50.4% ± 16.8%, P < 0.00001) on T2*‐weighted images, but the reduction in the spleen (47.2% ± 16.1%) was equivalent to the liver (38.8% ± 26.0%) on T2‐weighted images. J. Magn. Reson. Imaging 2001;14:72–77.

1 March 1992 in Magnetic Resonance in Medicine
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Journal Article
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Daniel Loïc PouliquenDaniel Loïc Pouliquen
Daniel Loïc Pouliquen
HPH. Perroud
H. Perroud
FCF. Calza
F. Calza
PJP. Jallet
P. Jallet
JJJ. J. Le Jeune
J. J. Le Jeune

1 November 1989 in Magnetic Resonance Imaging
Verified
Journal Article
Closed access
Daniel Loïc PouliquenDaniel Loïc Pouliquen
Daniel Loïc Pouliquen
RPR Perdrisot
R Perdrisot
AEA Ermias
A Ermias
SAS Akoka
S Akoka
PJP Jallet
P Jallet
JJJ.J Le Jeune
J.J Le Jeune

1 October 2000 in Brain Research
Verified
Journal Article
Closed access
AWAileen S. Wrynn
Aileen S. Wrynn
CSClı́ona P. Mac Sweeney
Clı́ona P. Mac Sweeney
FFFlorence Franconi
Florence Franconi
LLLaurent Lemaire
Laurent Lemaire
Daniel Loïc PouliquenDaniel Loïc Pouliquen
Daniel Loïc Pouliquen
JCJacques D. de Certaines
Jacques D. de Certaines