Publications by authors named "Michel H"

The effects of inflammatory bowel disease (IBD) and the medications used to treat it on sexual and reproductive health can be significant, impacting the quality of life of patients across gender identities. This article presents insights from a roundtable discussion facilitated by the Crohn's and Colitis Young Adults Network (CCYAN) between young adult patients with IBD and medical professionals, including physicians, nurses, psychologists, and trainees/medical students. It underscores the distinction between sexual and reproductive health, emphasizing the need to address both aspects comprehensively.

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An accurate force field (FF) is the foundation of reliable results from molecular dynamics (MD) simulations. In our recently published work, we developed a protocol to generate atom pair-specific Lennard-Jones (known as NBFIX in CHARMM) and through-space Thole dipole screening (NBTHOLE) parameters in the context of the Drude polarizable FF based on readily accessible quantum mechanical (QM) data to fit condensed phase experimental thermodynamic benchmarks, including the osmotic pressure, diffusion coefficient, ionic conductivity, and solvation free energy, when available. In the present work, the developed protocol is applied to generate NBFIX and NBTHOLE parameters for interactions between monatomic ions (specifically Li, Na, K, Rb, Cs, and Cl) and common functional groups found in proteins and nucleic acids.

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Article Synopsis
  • The study evaluated quinacrine, an FDA-approved drug, for its protective effects against hepatic encephalopathy (HE) in a rat model with bile duct ligation (BDL) and focused on the liver-brain communication through BMP2 signaling.
  • Results indicated that BDL caused significant liver damage and cognitive deficits in rats, but quinacrine treatment improved liver function and cognitive abilities by restoring crucial signaling pathways.
  • The findings suggest that quinacrine may offer potential benefits for treating HE by enhancing liver and brain health, highlighting the role of BMP2 signaling in this process.*
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Background: Methotrexate (MTX) is a cytotoxic drug that can trigger neurotoxicity via enhancing oxidative stress, apoptosis, and inflammation. On the other hand, erythropoietin (EPO) functions as an antioxidant, anti-apoptotic, and anti-inflammatory agent, in addition to its hematopoietic effects.

Aim: The present study was developed to examine the neuroprotective impact of EPO against MTX-provoked neurotoxicity in rats.

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Protein homeostasis (proteostasis) refers to the plethora of mechanisms that safeguard the proper folding of the newly synthesized proteins. It entails various intricately regulated cues that demolish the toxic protein species to prevent their aggregation. The ubiquitin-proteasome system (UPS) is recognized as a salient protein degradation system, with a substantial role in maintaining proteostasis.

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Kawasaki Disease (KD) is a multisystemic vasculitis of medium- and small-sized arteries. Abnormal intimal thickening may develop in the involved arterial area after regression of coronary artery aneurysm (CAA). Intimal dysfunction may induce local stenosis or arteriosclerosis in the future.

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Objective: Patients with inflammatory bowel disease (IBD) prescribed immunosuppressive therapies including antitumor necrosis factor (aTNF) therapies are at increased risk of histoplasmosis. We aim to evaluate the presentation, management, and outcomes of youth with IBD and concurrent histoplasmosis.

Methods: Single center, retrospective review of youth with IBD diagnosed with histoplasmosis from January 12, 2007 to January 1, 2022.

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Deterioration in the neurocognitive function of cancer patients referred to as "Chemobrain" is a devastating obstacle associated with cyclophosphamide (CYP). CYP is an alkylating agent, clinically utilized as an efficient anticancer and immunosuppressant. Coenzyme Q10 (CoQ10) is a worthwhile micronutrient with diverse biological activities embracing antioxidant, anti-apoptotic, and neuroprotective effects.

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Article Synopsis
  • People with schizophrenia have lower levels of butyrate-producing bacteria in their gut, which is important for gut health and reducing inflammation.
  • This study involved 27 participants with schizophrenia or schizoaffective disorder, who underwent a 10-day trial testing the effects of an oligofructose-enriched inulin prebiotic (OEI) against a placebo.
  • Results showed that those who received OEI had higher levels of plasma butyrate and more participants meeting the responder criteria compared to the placebo group, indicating the prebiotic may benefit gut health in these individuals.
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Objectives: Combination therapy consists of both anti-tumor necrosis factor (anti-TNF) and an immunomodulator (IMM) and has been shown to improve outcomes in patients with inflammatory bowel disease (IBD). This study assesses the impacts of IMM withdrawal from combination therapy to anti-TNF monotherapy in children with IBD.

Methods: This single-center retrospective cohort study included children with IBD initiated on combination therapy between 2014 and 2019 who discontinued the IMM.

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Depression is a serious medical illness characterized by persistent feelings of sadness, hopelessness, and lack of interest in daily activities. It can interfere with daily functioning and quality of life. Despite decades of research, the pathophysiology of depression remains incompletely understood.

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  • Pulmonary hypertension (PH) in newborns is a serious condition linked to multiple diseases, making early detection and severity classification vital for effective treatment.
  • This research introduces an advanced deep learning method that uses multi-view echocardiograms to predict and classify the severity of PH in 270 newborns, addressing the need for an automated assessment tool in pediatric care.
  • The model achieved promising results with high F1-scores for both severity prediction and detection, and it provides insights through saliency maps that indicate focus on important cardiac structures, thereby supporting its potential clinical application.
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G-quadruplexes (GQs) play key regulatory roles within the human genome and have also been identified to play similar roles in other eukaryotes, bacteria, archaea, and viruses. Human immunodeficiency virus 1, the etiological agent of acquired immunodeficiency syndrome, can form two GQs in its long terminal repeat (LTR) promoter region, each of which act to regulate viral gene expression in opposing manners. The major LTR GQ, called LTR-III, is a distinct hybrid GQ containing a 12-nucleotide duplex loop attached to the quadruplex motif.

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  • Classic Hodgkin Lymphoma (cHL) is characterized by the presence of rare malignant HRS cells within a dense T-cell rich immune environment, with approximately 25% of cases linked to the Epstein-Barr Virus (EBV).
  • Using advanced imaging techniques, researchers analyzed 20 cHL samples to identify key differences in the tumor microenvironment between EBV-positive and EBV-negative cases, noting variations in T-cell populations and their dysfunction.
  • The study highlights distinct transcriptomic profiles that affect HRS cell growth and T-cell interactions, emphasizing the importance of understanding virus-associated tumors for developing targeted therapies.
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  • * A quality improvement project implemented safe switching protocols, and data on patient demographics, health assessments, and lab results were collected before and after the switch for analysis.
  • * Results showed no significant changes in clinical outcomes or adverse effects after the switch; additionally, there was a notable cost savings of over $566,000 from using the biosimilar.
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This study aimed to assess the potential impact of long-term chronic exposure (69 years) to naturally-occurring radionuclides (RNs) and heavy metals on microbial communities in sediment from a stream flowing through a watershed impacted by an ancient mining site (Rophin, France). Four sediment samples were collected along a radioactivity gradient (for U368 to 1710 Bq.Kg) characterized for the presence of the bioavailable fractions of radionuclides (Ra, Po), and trace metal elements (Th, U, As, Pb, Cu, Zn, Fe).

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Synthetic organic polymers commonly are used in the construction of healthcare product and medical device components. Medical devices often are sterilized to ensure that they are free from viable microorganisms. A common technique to achieve this is using ionizing radiation, usually gamma.

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Objectives: Therapeutic drug monitoring (TDM) and dose optimization have been shown to improve clinical outcomes with antitumor necrosis factor and recent studies in adults suggest an exposure-response relationship with drug levels associated with improved clinical outcomes. However, these levels are not universally recognized as therapeutic targets for vedolizumab dosing. We aimed to assess the impact of a TDM quality improvement (QI) initiative on 52-week clinical outcomes and describe proactively obtained vedolizumab levels during the induction period in children with inflammatory bowel disease (IBD).

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Parametric release, which relies on use of process data for product release, provides many benefits. However, adoption by the sterilization industry has been slow, with release typically involving biological indicator (BI) growth responses/ dosimetry readings. The current article highlights how the data provided by the process (described through examples for ethylene oxide [EO], vaporized hydrogen peroxide [VHP], and radiation) may be better used to inform parametric release implementation.

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Depression is a major emotional disorder that has a detrimental effect on quality of life. The chronic mild stress (CMS)-depression model was adopted in rats to evaluate the neurotherapeutic effect of Clotrimazole (CLO) and investigate the possible mechanisms of its antidepressant action via its impact on the hypothalamic pituitary adrenal (HPA) axis and the stress hormone, cortisol. It was found that azole antifungals affect steroidogenesis and the HPA axis.

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The Crohn's & Colitis Foundation has grown to appreciate the needs of gastroenterology trainees with numerous initiatives designed to provide education, academic opportunities, and mentoring in inflammatory bowel disease (IBD) in recent years. The editors and staff at (CC360) have launched 2 new initiatives, the Fellow's Corner and the CC360 Editorial Fellowship, to support trainees in gaining knowledge and skills regarding peer review and publication as well as offering guidance on training in IBD and an opportunity for publication in this peer-reviewed, open access, quarterly online journal. These opportunities are described in this manuscript.

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Latinx children face psychosocial, linguistic, and economic challenges that put them at an increased risk of developing mental health conditions. Primary care providers should be equipped to recognize the complex mental health needs of this growing population. This article explores some of the barriers to mental health screenings in Latinx children and presents culturally sensitive, validated screening tools for primary care providers.

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Background: Hyperbilirubinemia of the newborn infant is a common disease worldwide. However, recognized early and treated appropriately, it typically remains innocuous. We recently developed an early phototherapy prediction tool (EPPT) by means of machine learning (ML) utilizing just one bilirubin measurement and few clinical variables.

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