Publications by authors named "Ramirez R"

Background: Neuroendocrine carcinomas (NECs) are treated with a frontline platinum-etoposide combination with no standard second-line therapies. We explored a novel combination of nanoliposomal irinotecan (Nal-IRI), 5-fluorouracil (5-FU), and leucovorin (LV) in advanced refractory NECs and investigated the impact of UGT1A1*28 polymorphism on treatment outcomes and toxicity.

Methods: We conducted an open-label, single-arm, multi-center Phase 2 trial in advanced NEC patients of gastroenteropancreatic (GEP) or unknown origin with progression or intolerance to first-line therapy.

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The detection of endogenous anabolic androgenic steroids (EAAS) is performed with the Steroidal Module of the Athlete Biological Passport (ABP). Glucocorticoids (GC) could be a confounding factor to the ABP Steroidal Module because they inhibit the hypothalamic-pituitary-adrenal axis, and ABP metabolites have partial adrenal origin. In previous studies, single-dose systemic GC administrations have been shown to reduce the urinary ratios A/T and 5αdiol/E.

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Tracheoesophageal puncture (TEP) with voice prosthesis (VP) placement is commonly used to restore voice in laryngectomy patients. The conventional procedure utilizes a rigid esophagoscope to open and visualize the pharyngeal inlet. However, this approach is challenging in patients with postradiation changes, reduced neck extension, or trismus.

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Article Synopsis
  • Atopic dermatitis (AD) greatly affects patients' quality of life, and existing guidelines often target specialists instead of primary care physicians (PCPs).
  • A study aimed to create a consensus document specifically for PCPs, offering evidence-based recommendations to enhance AD patient diagnosis and management.
  • The document identifies obstacles PCPs face in implementing guidelines and provides consensus solutions to improve care for AD patients across different medical specialties.
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Introduction: Malaria molecular surveillance (MMS) can provide insights into transmission dynamics, guiding national control programs. We previously designed AmpliSeq assays for MMS, which include different traits of interest (resistance markers and deletions), and SNP barcodes to provide population genetics estimates of and parasites in the Peruvian Amazon. The present study compares the genetic resolution of the barcodes in the AmpliSeq assays with widely used microsatellite (MS) panels to investigate population genetics of Amazonian malaria parasites.

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Chikungunya virus infection (CHIKV) increases the risk of persistent arthralgia; however, there is no consistent evidence regarding prognostic biomarkers of progression to chronic arthropathy. This systematic review provides an overview of currently available literature about the potential role of the acute immunologic response in predicting long-term joint pain in patients with a diagnosis of CHIKV. We searched for observational studies using the terms "chikungunya," "cytokines," "biomarkers," and "joint pain" in PubMed/MEDLINE, LILACS, Cochrane Library Plus, and SCOPUS databases, restricting to articles published in English and up to April 2024.

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Background & Aims: Integrated HBV DNA (iDNA) plays a critical role in HBV pathogenesis, particularly in predicting treatment response and HCC. This study aimed to use an HBV hybridization-capture next-generation sequencing (HBV-NGS) assay to detect HBV-host junction sequences (HBV-JS) in a sensitive nonbiased manner to detect and estimate the iDNA fraction in tissue biopsies and HBV genetics by liquid biopsy.

Methods: HBV DNA from plasmid monomers, HBV-HCC cell line (SNU398, Hep3B, and PLC/PRF/5), tissue biopsies of patients with serum HBV DNA <4 log IU/ml, and matched urine and plasma of HBV patients were assessed by HBV-NGS.

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MOTS-c is a mitochondrial microprotein that improves metabolism. Here, we demonstrate CK2 is a direct and functional target of MOTS-c. MOTS-c directly binds to CK2 and activates it in cell-free systems.

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Background: Stereotactic body radiotherapy (SBRT) is a precise and effective treatment for pulmonary oligometastases, offering high local control (LC) rates. However, the optimal SBRT dose when combined with immunotherapy remains unclear, and there is a lack of comprehensive studies focusing on dose optimization in this setting. This study addresses this knowledge gap by exploring different SBRT dose regimens and their impact on progression-free survival (PFS), overall survival (OS), and LC in patients receiving concurrent immunotherapy, offering novel insights into the synergistic effects of these treatments.

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Background: Radiation therapy with or without chemotherapy is commonly used as an adjunct or alternative to surgery for treating head and neck cancer (HNC). In rare cases, radiation-induced side effects such as posterior pharyngeal wall necrosis, fistula formation, and osteoradionecrosis (ORN) can lead to dangerous complications of the cervical spine (C-spine).

Methods: We conducted a literature review on C-spine ORN in HNC, and we reported four additional cases following the treatment of oropharyngeal carcinoma.

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Introduction: Bisphosphonates (BPs) are widely used for osteoporosis and cancer-induced bone diseases due to their antiresorptive properties, yet they pose risks such as medication-related osteonecrosis of the jaw (MRONJ).

Methods: We present a unique case of concurrent oral squamous cell carcinoma (SCC) and MRONJ in a 72-year-old female chronically treated with oral ibandronate for osteoporosis. Following a dental extraction, she developed a nonhealing wound in the maxilla.

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Hypersensitivity pneumonitis (HP) is an immune-mediated inflammatory interstitial lung disease that may evolve to pulmonary fibrosis, a progressive disorder with a poor prognosis characterized by fibroblast activation and extracellular matrix accumulation. In HP lung fibroblasts, the gene expression of proteins involved in the interaction with the immune response, their isoforms, and how they influence their phenotype have yet to be elucidated. We analyzed the expression and splicing variants of 16 target genes involved in the interaction between HP fibroblasts and immune signaling and evaluated possible correlations with clinical data.

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Background: The impact of nucleos(t)ide analogues on intrahepatic viral burden and immune microenvironment in patients with chronic hepatitis B (CHB) is not clear.

Objective: We aimed to characterise the effects of tenofovir disoproxil fumarate (TDF) on intrahepatic viral burden and the liver immune microenvironment in patients with CHB.

Design: Core liver biopsies were collected at baseline and year 3 from patients with CHB with minimally raised serum alanine aminotransferase in a double-blind placebo-controlled trial (NCT01522625).

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To benchmark the accuracy of the models and improve the predictive capability of future experiments, the National Ignition Facility requires measurements of the physical conditions inside inertial confinement fusion hohlraums. The ion temperature and bulk motion velocity of the gas-filled regions of the hohlraum can be obtained by replacing the helium tamping gas in the hohlraum with deuterium-tritium (DT) gas and measuring the Doppler broadening and Doppler shift of the neutron spectrum produced by nuclear reactions in the hohlraum. To understand the spatial distribution of the neutron production inside the hohlraum, we have developed a new penumbral neutron imager with a 12 mm diameter field of view using a simple tungsten alloy spindle.

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Disruptive physician behavior has become a common problem in medicine. Individuals who conduct themselves in a manner that could negatively affect patient care, or "disruptive physicians," frequently cause stress for patients and staff, are a headache for leadership, and can require expensive remediation. We suggest that rather than "bad apples," many disruptive physicians are the fruit of a "toxic tree.

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Article Synopsis
  • Psychedelics are substances that alter thoughts, feelings, and perceptions, with lysergic acid diethylamide (LSD) being the most powerful and the first semi-synthetic hallucinogen.
  • They are being researched for their potential therapeutic benefits in treating neuropsychiatric disorders and helping with addictions.
  • The analysis of 27 serotonergic psychedelic molecules reveals that their potency is linked to their ability to accept electrons and their global softness, enhancing our understanding of how these drugs work.
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The mechanical behavior of unreinforced masonry (URM) shear walls under in-plane cyclic loading is crucial for assessing their seismic performance. Although masonry structures have been extensively studied, the specific influence of varying lime content in cement-lime mortars on the cyclic behavior of URM walls has not been adequately explored. This study addresses this gap by experimentally evaluating the effects of three mortar mixes with increasing lime content, 1:0:5, 1:1:6, and 1:2:9 (cement:lime:sand, by volume), on the cyclic performance of brick URM walls.

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Malaria molecular surveillance (MMS) can provide insights into transmission dynamics, guiding national control/elimination programs. Considering the genetic differences among parasites from different areas in the Peruvian Amazon, we previously designed SNP barcode panels for (Pv) and (Pf), integrated into AmpliSeq assays, to provide population genetics estimates of malaria parasites. These AmpliSeq assays are ideal for MMS: multiplexing different traits of interest, applicable to many use cases, and high throughput for large numbers of samples.

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Sunflower (Helianthus annuus) is an ornamental, edible-seed, and important oil source plant in the USA. In June 2023, head rot was observed in sunflowers grown in an experimental field at Yuma County Cooperative Extension, University of Arizona, AZ (32°42'35.5"N, 114°42'25.

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Plants are attacked by diverse herbivorous pests with different host specializations. While host plant resistance influences pest pressure, how resistance impacts the behaviors of generalist and specialist herbivores, and the relationship to resistance, is less well known. Here, we investigated the short-term (< 1 h) behavioral changes of a generalist herbivore, the two-spotted spider mite (TSM), and a specialist herbivore, the Banks grass mite (BGM), after introduction to no-choice Tanglefoot leaf-arenas (2 × 2 cm) of three maize inbred lines (B73, B75, and B96).

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Purpose: Surgical pathology reports play an integral role in postoperative management of head and neck cancer patients. Pathology reports of complex head and neck resections must convey critical information to all involved clinicians. Previously, we demonstrated the utility of 3D specimen and defect scanning for communicating margin status and documenting the location of supplemental margins.

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One-third of Mars' surface has shallow-buried HO, but it is currently too cold for use by life. Proposals to warm Mars using greenhouse gases require a large mass of ingredients that are rare on Mars' surface. However, we show here that artificial aerosols made from materials that are readily available at Mars-for example, conductive nanorods that are ~9 micrometers long-could warm Mars >5 × 10 time smore effectively than the best gases.

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Protein nanopores have proven to be effective for single-molecule studies, particularly for single-stranded DNA (ssDNA) translocation. Previous experiments demonstrated their ability to distinguish differences in purine and pyrimidine bases and in the orientation of the ssDNA molecule inside nanopores. Unfortunately, the microscopic details of ssDNA translocation over experimental time scales, which are not accessible through all-atom molecular dynamics (MD), have yet to be examined.

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To evaluate the criteria used by allergists in selecting an immunotherapy extract (allergen immunotherapy [AIT]-extract) in rhinitis patients with polysensitization. First, a cross-sectional study was carried out by evaluating different factors that influence the medical choice of AIT-extract. Second, a literature review was performed by evaluating the diagnostic performance of atopy tests.

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Unlabelled: Industry 4.0 has led to digitalization and an increase in industrial activity. However, it has recently been recognized as inadequate for achieving European goals by 2030.

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