Intra-arterial in-situ bevacizumab injection effect on angiogenesis. Results on a swine angiogenesis model

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Pelvic magnetic resonance imaging in the ewe: a model for experimental gynecologic research.

International audienceAIM: Our goal was to demonstrate the feasibility of pelvic magnetic resonance imaging (MRI) in the ewe. MATERIAL AND METHODS: Two ewes underwent a pelvic 3 Tesla MRI scan, under light anesthesia, with T2-weighted fast spin-echo images and T1-weighted spoiled gradient-echo images. Multiplan T1 weighted images were also obtained after the intravenous injection of a contrast product. One ewe was anestrous and the other one had undergone ovarian stimulation. RESULTS: No incident occurred during the examination. Both the uterus (with two horns) and the ovaries were identified. The intensity of the endometrial, myometrial and ovarian signals was similar to that encountered in women. The uterus and ovaries could be enhanced in both cases. Pelvic vasculature was also studied. In the case of hormonal stimulation, the endometrium was thicker, follicular growth was identified and enhancement seemed greater. CONCLUSION: MRI in the ewe is feasible and could be helpful in experimental gynecologic research, especially in uterus transplantation

Development of an angiogenesis animal model featuring brain arteriovenous malformation histological characteristics

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Intracranial Aneurysm Treatment by New Bioactive Endoprosthesis

International audienceIntroduction: In this presentation we give an overview of modified surface coil technologies. We present potential perspectives to develop biologically optimized devices. We propose an innovative approach to optimize the healing of aneurysms by fucoidan-coated coils.Method(s): We have conducted a feasibility study. Elastase induced aneurysms were created in 45 rabbits divided into two treatment groups. Embolization was performed with bare platinum coils or fucoidan covered coils. One month later control DSA was performed, aneurysm filling was measured by modified Raymond–Roy scale. Histological samples were collected and aneurysm healing and fibrosis were measured by quantifying mainly collagens on standard light microscope and multiphoton microscopy.Result(s): No significant difference could be found at angiography. A significant difference was found with the presence of more collagen in the neck region of aneurysms treated with fucoidan covered coils versus bare platinum coils also histological index and collagen organization index differed significantly.Conclusion(s): Our work presents a proof-of-concept study to demonstrate the feasibility and biological efficacy of treatment with coils coated with fucoidan. We have demonstrated the feasibility of grafting fucoidan

Analysis of the in vitro and in vivo effects of photodynamic therapy on prostate cancer by using new photosensitizers, protoporphyrin IX-polyamine derivatives

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Integron Digestive Carriage in Human and Cattle: A “One Health” Cultivation-Independent Approach

Objectives: Dissemination of antimicrobial resistance (AMR) is a global issue that requires the adoption of a “One-Health” approach promoting integration of human and animal health. Besides culture-dependent techniques frequently used for AMR surveillance, cultivation-independent methods can give additional insights into the diversity and reservoir of AMR genetic determinants. Integrons are molecular markers that can provide overall and reliable estimation of AMR dissemination. In this study, considering the “One-Health” approach, we have analyzed the integron digestive carriage from stools of humans and cattle living in a same area and exposed to different antibiotic selection pressures.Methods: Three collections of human [general population (GP) and intensive care unit patients (ICUs)] and bovine (BOV) stool samples were analyzed. The three main classes of integrons were detected using a multiplex qPCR both from total DNA extracted from stools, and from Gram-negative bacteria obtained by culture after an enrichment step.Results: With the cultivation-independent approach, integron carriage was 43.8, 52.7, and 65.6% for GP, ICU, and BOV respectively, percentages being at least twofold higher to those obtained with the cultivation-dependent approach. Class 1 integrons were the most prevalent; class 2 integrons seemed more associated to cattle than to humans; no class 3 integron was detected. The integron carriage was not significantly different between GP and ICU populations according to the antibiotic consumption, whatever the approach.Conclusion: The cultivation-independent approach constitutes a complementary exploratory method to investigate the integron digestive carriage of humans and bovines, notably within subjects under antibiotic treatment. The high frequency of carriage of integrons in the gut is of clinical significance, integrons being able to easily acquire and exchange resistant genes under antibiotic selective pressure and so leading to the dissemination of resistant bacteria

Uterus tolerance to extended cold ischemic storage after auto-transplantation in ewes

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Flow-Diverter Stents for the Treatment of Saccular Middle Cerebral Artery Bifurcation Aneurysms: Is “Unsuitable” the Right Conclusion?

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Bioactive refinement for endosaccular treatment of intracranial aneurysms

International audienceEndovascular treatment is the first-line therapy for most intracranial aneurysms; however, recanalisation remains a major limitation. Developments in bioengineering and material science have led to a novel generation of coil technologies for aneurysm embolisation that address clinical challenges of aneurysm recurrence. This review presents an overview of modified surface coil technologies and summarises the state of the art regarding their efficacy and limitations based on experimental and clinical results. We also present potential perspectives to develop biologically optimised devices

Role of terminal and anastomotic circulation in the patency of arteries jailed by flow-diverting stents: animal flow model evaluation and preliminary results

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