Publications by authors named "Halimi C"

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  • * The study found that MSCs influence microglia, the brain's immune cells, to adopt pro-regenerative functions by altering the extracellular matrix in response to inflammation.
  • * Key findings showed that MSC secretome leads to changes in microglial behavior, enhancing their mobility and cellular structures, which are important for promoting healing in the brain.
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  • Susac syndrome is a rare disease primarily affecting young women, characterized by occlusive microvessel issues in the brain, retina, and inner ear, and lacks established treatment protocols from randomized trials.
  • The study investigated the effectiveness of glucocorticoids alone or with other immunosuppressive treatments for preventing relapses in Susac syndrome, and involves a national cohort of patients recruited in France since 2011.
  • Data were collected on various health indicators and treatments over a 36-month period to determine the first relapse, involving 64 patients, and the study is registered on ClinicalTrials.gov for transparency.
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Introduction: In free flap reconstruction, improving flap tolerance to warm ischemia (WI) is fundamental. WI is the result of a venous or arterial thrombosis, which can only be addressed through surgical revision. No additional treatments have shown superior efficacy at salvaging free flaps after or during WI.

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Background: Local infiltration analgesia (LIA) has been advocated for the pain management after total hip arthroplasty (THA). The analgesic benefits of an added pericapsular nerve group (PENG) block remain questionable.

Methods: This randomized, single-blind trial enrolled patients undergoing elective THA under general anaesthesia and standardized postoperative analgesia.

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The emulsification potential of plant-based emulsifiers, that is, pea (PPI) and lentil (LPI) proteins (4%), corn arabinoxylans (CAX, 1%), and legume protein-arabinoxylan mixtures (4% proteins + 0.15 or 0.9% CAX), was evaluated by assessing: the surface tension and potential of emulsifiers, emulsifier antinutritional contents, emulsion droplet size, emulsion physical stability, and vitamin E bioaccessibility from 10% oil-in-water emulsions.

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  • Common beans are nutritious but contain antinutritional factors (ANFs) like saponins and phytates that can hinder the absorption of important micronutrients, including carotenoids and minerals.
  • Researchers aimed to identify bean lines with low ANF levels that would enhance the bioavailability of these nutrients.
  • Some modified bean lines showed significant improvements in carotenoid bioaccessibility, indicating that reducing phytate levels alone may not be enough unless other ANFs are also addressed.
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  • Primary hyperparathyroidism (PHPT) is often linked with high calcium levels, while normocalcemic primary hyperparathyroidism (NHPT) can be easily misdiagnosed.
  • A study analyzed patients with hypercalciuric kidney stones to compare characteristics and prevalence of NHPT versus hypercalcemic hyperparathyroidism (HPHPT), revealing that NHPT accounts for 40% of PHPT cases.
  • The results found no significant differences in parathyroid characteristics or stone composition between NHPT and HPHPT, but indicated that NHPT patients showed a stronger response to calcium loading, highlighting the importance of dynamic testing for accurate diagnosis.
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Aging and obesity are associated with a decrease in plasma 25-hydroxyvitamin D (25(OH)D) levels. In the context of a growing aging population and the rising incidence of obesity, we hypothesized that aging process, either independently or in combination with obesity, could influence vitamin D (VD) metabolism, consequently resulting in the reduced 25(OH)D plasma concentrations. C57BL/6JRJ young (6 months) and old (23 months) mice fed with control (CD) or high fat diet (HF) were compared.

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We investigated the effects of fatty acid/ monoglyceride type and amount on the absorption of fat-soluble vitamins. Micelles or vesicles made with either caprylic acid (CA) + monocaprylin (MC) or oleic acid (OA) + monoolein (MO) at low or high concentrations were infused in bile duct-ligated mice. Retinol + retinyl ester and γ-tocopherol intestinal mucosa contents were higher in mice infused with CA + MC than with OA + MO (up to + 350 % for vitamin A and up to + 62 %, for vitamin E; p < 0.

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  • Nonreversible hearing loss (HL) is a significant issue for patients with Susac syndrome (SuS), prompting a study to identify risk factors associated with HL in these individuals.* -
  • The CARESS study involved 36 patients diagnosed with SuS, revealing that 52.8% experienced severe HL after a median follow-up of about 52 months, with many showing cochleovestibular involvement at diagnosis.* -
  • The study concluded that the use of immunosuppressive (IS) drugs at diagnosis may lower the odds of developing severe HL, suggesting these drugs should be regularly considered in SuS treatment.*
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Provitamin A (proVA) carotenoid synthesis and degradation are strongly influenced by environmental factors, including during post-harvest storage. Hypobaric and hyperbaric storages increase the shelf-life of many crops, but their effects on proVA carotenoids are not known. Our aim was to investigate the effects of modifications of atmospheric pressure and composition on - and -carotene concentration and bioaccessibility during the post-harvest storage of carrots and sweet potatoes.

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  • Familial hypobetalipoproteinemias (FHBL) are rare genetic disorders linked to lipid malabsorption, specifically abetalipoproteinemia (FHBL-SD1) and chylomicron retention disease (FHBL-SD3), caused by mutations in MTTP and SAR1B genes.* -
  • This study aimed to assess the absorption and levels of carotenoids in patients with these conditions, revealing significant deficiencies in carotenoid levels compared to healthy controls; in lab models, carotenoid absorption was notably reduced.* -
  • The findings suggest that despite treatment with fat-soluble vitamins, there's a continued loss in visual function, indicating that carotenoid supplementation could be crucial, and further research is
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It is strongly suspected that, like lutein, zeaxanthin (ZEA) plays a biological role in the human eye. Many studies also suggest that it could reduce the risk of age-related macular degeneration and improve cognition. Unfortunately, it is only present in a very limited number of foods.

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Upper aerodigestive tract squamous cell carcinomas are the most frequent head and neck cancers. They are generally associated with alcohol and tobacco, but can also be HPV-induced for the oropharynx. Their diagnosis is often late and at a locally advanced stage, making treatment more complex.

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Abetalipoproteinemia (FHBL-SD1) and chylomicron retention disease (FHBL-SD3) are rare recessive disorders of lipoprotein metabolism due to mutations in and genes, respectively, which lead to defective chylomicron formation and secretion. This results in lipid and fat-soluble vitamin malabsorption, which induces severe neuro-ophthalmic complications. Currently, treatment combines a low-fat diet with high-dose vitamin A and E supplementation but still fails in normalizing serum vitamin E levels and providing complete ophthalmic protection.

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Purpose: 1) To test the hypothesis of the existence of a perinatal vitamin A (VA) programming of VA metabolism and to better understand the intestinal regulation of VA metabolism.

Methods: Offspring from rats reared on a control (C) or a VA-deficient (D) diet from 6 weeks before mating until offspring weaning, i.e.

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In vitro experiments showed that i) phytates, tannins and saponins from pulses can alter vitamin D and K bioavailability and ii) meat decreased vitamin D bioaccessibility by impairing its stability during digestion. We aimed to confirm these results in vivo by force-feeding mice with emulsions containing either potatoes or semolina or chickpeas or meat. Vitamin D and K plasma responses decreased after a gavage with chickpeas or meat compared with potatoes (-62 % and -67 %, respectively for vitamin D, -40 % and -64 %, respectively for vitamin K; p < 0.

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This study was conducted to determine Thysanoptera species composition associated with olive trees, fruit injury, fluctuations in the abundance of the most phytophagous species relative to the phenological stages of the olive tree, and the temporal variations in the species in relation to environmental variations in Biskra province between 2018 and 2020. The olive orchard chosen for this study is located at the Experimental Station of the Technical Institute for the Development of Saharan Agriculture (ITDAS) in El Outaya (Biskra, a Saharan region of Algeria). Five trees were sampled each week, and thrips were collected by shaking 20 twigs (4 twigs per tree).

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Enriching cereals-based products with bioactive compounds is a valuable strategy to improve product quality. We studied carotenoid bioaccessibility and intestinal uptake from a pumpkin-enriched porridge, cookies and sponge cakes by using in vitro digestion coupled with Caco-2 cell uptake. Among the carotenoids recovered in different products, α-carotene was the most important abundant one.

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Scope: To study the effect of variation in dietary vitamin A (VA) content on its hepatic and intestinal metabolism.

Methods And Results: Adult female and male rats are fed with diets containing 400, 2300, or 9858 IU kg VA for 31-33 weeks. VA concentrations are measured in plasma and liver.

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Some bioactive compounds found in pulses (phytates, saponins, tannins) display antinutritional properties and interfere with fat-soluble vitamin bioavailability (i.e., bioaccessibility and intestinal uptake).

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Scope: The effect of vitamin A deficiency on vitamin A and lipid postprandial metabolism in young rats is addressed, considering the effect of sex.

Methods And Results: Sprague-Dawley rats are fed either 400 UI.kg vitamin A diet (vitamin A-deficient (VAD) diet) or 2300 UI.

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Scope: Most people are vitamin D insufficient around the world. Vitamin D intestinal absorption should thus be optimized. The role of the ATP-binging cassette G5/G8 (ABCG5/G8) heterodimer in vitamin D intestinal efflux is investigated.

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We showed that black soldier fly larvae reared on fruits and vegetables rich in provitamin A carotenoids can accumulate significant amounts of these vitamin A precursors. Using a simulated gastro-intestinal digestion model, we demonstrated that α- and β-carotene from the larvae are as bioaccessible as from the fruits and vegetables they were reared on. We calculated that provitamin A carotenoid-rich larvae have the capacity to provide more vitamin A than fruits and vegetables rich in these molecules.

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In this study, we evaluated vitamin D and mineral (iron, zinc, magnesium) transfer to the bolus aqueous phase during the digestion of meals with/without pulses. We performed in vitro digestions using test meals made either of i) beef and/or semolina and/or chickpeas, or of ii) potatoes supplemented or not with fibers, phytates, tannins and saponins. Chickpea presence led to a decrease in vitamin D bioaccessibility (-56%, p ≤ 0.

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