Publications by authors named "Xando Diaz- Villamarin"

Article Synopsis
  • Multidrug-resistant (MDR) bacteria are a major global health issue, particularly in intensive care units (ICUs) where high antibiotic use contributes to resistance.
  • This study evaluated the effects of a Selective Digestive Decontamination (SDD) protocol on antibiotic use and colonization by carbapenemase-producing Enterobacterale (CPE) in an ICU over two years.
  • Results showed that implementing SDD significantly reduced overall antibiotic consumption (especially carbapenems) and colonization rates of CPE, indicating it could be an effective approach to combat antimicrobial resistance in critical care without promoting MDR bacteria.
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Fluoropyrimidines (FPs) are commonly prescribed in many cancer streams. The EMA and FDA-approved drug labels for FPs recommend genotyping the *2A (rs3918290), *13 (rs55886062), *HapB3 (rs56038477), alleles, and rs67376798 before treatment starts. We implemented the genotyping in our daily clinical routine, but we still found patients showing severe adverse drug events (ADEs) to FPs.

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  • Azathioprine is an immunosuppressive drug used for conditions like acute lymphoblastic leukemia and autoimmune disorders, with its effectiveness influenced by genetic factors such as TPMT and NUDT15 variants.
  • The study investigated how adjusting azathioprine doses based on these genetic variations affects toxicity and efficacy in patients, specifically comparing those with intermediate and poor metabolizer genotypes against normal metabolizers.
  • Findings indicated that patients with TPMT intermediate genotypes experienced fewer toxicity events and required fewer dose adjustments while maintaining similar treatment effectiveness as normal metabolizers, suggesting other genetic factors may also play a role in azathioprine's toxicity.
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Background: Cardiovascular diseases and especially Acute Coronary Syndrome (ACS) constitute a major health issue impacting millions of patients worldwide. Being a leading cause of death and hospital admissions in many European countries including Spain, it accounts for enormous amounts of healthcare expenditures for its management. Clopidogrel is one of the oldest antiplatelet medications used as standard of care in ACS.

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Multiple sclerosis is a chronic inflammatory neurological disease, and siponimod (Mayzent) is the first oral treatment option for adult patients with secondary progressive multiple sclerosis. We performed a systematic review of the pharmacogenetics of Siponimod, and we found that (430 C>T; rs1799853) and CYP2C9 * 3 (1075 A>C; rs1057910), both translated no-function alleles, have been related to a lower metabolism of siponimod by CYP2C9 enzyme. The FDA-approved drug label and EMA risk management plan for siponimod require testing patients for CYP2C9 genotype before treatment starts.

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A severe form of myopia defined as pathologic/high myopia is the main cause of visual impairment and one of the most frequent causes of blindness worldwide. It is characterized by at least 6 diopters or axial length (AL) of eyeball > 26 mm and choroidal neovascularization (CNV) in 5 to 10% of cases. Ranibizumab is a humanized recombinant monoclonal antibody fragment targeted against human vascular endothelial growth factor A (VEGF-A) used in the treatment of CNV.

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High myopia is an ophthalmic pathology that affects half of the young adults in the United States and Europe and it is predicted that a third of the world's population could be nearsighted at the end of this decade. It is characterized by at least 6 diopters or axial length > 26 mm and, choroidal neovascularization (CNV) in 5 to 11% of cases. Ranibizumab is a recombinant humanized monoclonal antibody fragment.

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β-blockers are commonly prescribed to treat multiple cardiovascular (CV) diseases, but, frequently, adverse drug reactions and intolerance limit their use in clinical practice. Interindividual variability in response to β-blockers may be explained by genetic differences. In fact, pharmacogenetic interactions for some of these drugs have been widely studied, such as metoprolol.

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Polypoidal choroidal vasculopathy (PCV) is usually regarded as a subtype of choroidal neovascularization (CNV) that is secondary to age-related macular degeneration (AMD) characterized by choroidal vessel branching, ending in polypoidal lesions. Despite their close association, PCV and neovascular AMD have shown differences, especially regarding patients' treatment response. Currently, antivascular endothelial growth factor (anti-VEGF) drugs, such as ranibizumab, bevacizumab and aflibercept, have demonstrated their efficacy in CNV patients.

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Article Synopsis
  • There is growing interest in incorporating pharmacogenetics into clinical practice, especially for drugs in oncology, psychiatry, and antiviral treatments.
  • Despite significant scientific evidence supporting pharmacogenetic tests across various medical fields, various barriers hinder their broader integration.
  • The article reviews the current evidence and guidelines for pharmacogenetics related to clopidogrel, warfarin, acenocoumarol, and simvastatin, emphasizing their practical application in everyday healthcare.
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Clopidogrel is an antiplatelet drug given to patients before and after having a percutaneous coronary intervention (PCI). Genomic variants in the CYP2C19 gene are associated with variable enzyme activities affecting drug metabolism and hence, patients with reduced or increased enzymatic function have increased risk of bleeding. We conducted a cost-effectiveness analysis to compare a pharmacogenomics versus a non-pharmacogenomics-guided clopidogrel treatment for coronary artery syndrome patients undergoing PCI in the Spanish healthcare setting.

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This article contains data related to the research article entitled "Results of genotype-guided antiplatelet therapy in patients undergone percutaneous coronary intervention with stent" (J. Sánchez-Ramos, C.L.

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Background: Clopidogrel has provided beneficial effects in acute coronary syndrome and percutaneous coronary intervention. Different polymorphisms have been associated with differences in clopidogrel response. The aim of this study was to check if CYP2C19/ABCB1-genotype-guided strategy reduces the rates of cardiovascular events and bleeding.

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Aim: To study the association of ABCB1 and CYP2C19 polymorphisms and the clopidogrel response in Spanish peripheral artery disease patients following percutaneous transluminal angioplasty (PTA) and to perform a meta-analysis.

Materials & Methods: 72 patients were recruited and 122 patients included in the meta-analysis. We evaluated the effect of ABCB1 3435 C>T, CYP2C19*2 and CYP2C19*3 and primary end point (restenosis/occlusion of the treated lesions) during 12 months after PTA.

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Article Synopsis
  • Genetic variations significantly impact how much acenocoumarol patients need, and testing for these variations can lead to better health outcomes and resource use.
  • The study developed a predictive algorithm that incorporates both clinical and genetic factors to determine optimal acenocoumarol dosages, utilizing data from 685 patients across three healthcare settings.
  • The algorithm showed effectiveness, with a coefficient of determination (R2) of 52.8% in the training group and 64% in the validation group, helping to classify patients into correct dosage categories more accurately.
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