Publications by authors named "J. Calderon"

The small-sized cervid Procervulus is considered as the most basal member of the Cervidae and one of the earliest ruminants bearing antler-like appendages. The Iberian Miocene record of this stem-cervid is extensively documented and largely overlaps with the Miocene Climatic Optimum (MCO), a transient period of global warming of particular interest when comparing present and near future conditions. Despite receiving a substantial amount of attention, histological studies on Procervulus are very scarce and only limited to postcranial remains of Procervulus praelucidus from Germany (MN3).

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Polysorbate 20 (PS20) is commonly used as an excipient in therapeutic protein formulations. However, over the course of a therapeutic protein product's shelf life, minute amounts of co-purified host-cell lipases may cause slow hydrolysis of PS20, releasing fatty acids (FAs). These FAs may precipitate to form subvisible particles that can be detected and imaged by various techniques, e.

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Background: Historically, access to high-quality care has been a central challenge for Medicaid programs. Prior single-year analyses demonstrated that Medicaid beneficiaries account for disproportionately high patient volumes at low-quality hospitals. Given major Medicaid shifts including expansion and increased managed care, we examined recent trends in low-quality hospital use for Medicaid beneficiaries.

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Lysine demethylases (KDMs) catalyze the oxidative removal of the methyl group from histones using earth-abundant iron and the metabolite 2-oxoglutarate (2OG). KDMs have emerged as master regulators of eukaryotic gene expression and are novel drug targets; small-molecule inhibitors of KDMs are in the clinical pipeline for the treatment of human cancer. Yet, mechanistic insights into the functional heterogeneity of human KDMs are limited, necessitating the development of chemical probes for precision targeting.

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Famotidine, a H-receptor antagonist, is commonly used to treat heartburn and gastroesophageal reflux disease during pregnancy. However, information on the pharmacokinetics (PK) of famotidine in pregnant patients is limited since pregnant patients are usually excluded from clinical trials. This study aimed to develop and evaluate a physiologically based pharmacokinetic (PBPK) model for famotidine in non-pregnant and pregnant populations, and to combine it with a pharmacodynamic (PD) model to predict the effect of famotidine on intragastric pH.

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The extent of alien taxa impacts on river ecosystem health is unclear, but their frequency continues to rise. We investigated 1) the prevalence of including alien taxa in common bioindicators used in river bioassessment, 2) the effect of alien taxa on the richness and abundance of natives, and 3) whether including alien taxa in bioassessment tools increased their sensitivity to river degradation. In the 17 countries analyzed fish represented the greatest number of alien species (1726), followed by macrophytes (925), macroinvertebrates (556), and diatoms (7).

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The surge in deformational head shapes (DHSs) over the past 30 years has led to increased interest in comparing the treatment options of Repositioning Therapy (RT) and a Cranial Remolding Orthosis (CRO). This study investigates the amount and rate of 2D and 3D correction in infants with DHSs during these treatments. A total of 34 infants with DHSs were enrolled (RT group, = 18; CRO group, = 16).

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Contamination of water bodies is a significant global issue that results from the deliberate release of pollutants into the environment, especially from mining and metal processing industries. The main pollutants generated by these industries are metallic wastes, particularly metals, which can cause adverse effects on the environment and human health. Therefore, it is crucial to develop effective and sustainable approaches to prevent their discharge into the environment.

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Yoga is recognized as a complementary practice that improves physical, mental, and spiritual health in survivors of cancer. The present study assessed associations between a holistic approach and physical function for 30 survivors of cancer in south Texas. Cancer survivors (86% female) of diverse backgrounds (62% underrepresented minorities) performed a battery of physical function tests, including a 6-minute walk test, to assess cardiorespiratory function, isometric shoulder and elbow-flexor strength, dominant-arm grip strength, dominant-arm shoulder range of motion via inclinometer, sit-and-reach test to assess trunk and lower-extremity flexibility, and a 30-second sit-to-stand test to assess lower-extremity endurance.

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Failure to rapidly diagnose tuberculosis disease (TB) and initiate treatment is a driving factor of TB as a leading cause of death in children. Current TB diagnostic assays have poor performance in children, and identifying novel non-sputum-based TB biomarkers to improve pediatric TB diagnosis is a global priority. We sought to develop a plasma biosignature for TB by probing the plasma proteome of 511 children stratified by TB diagnostic classification and HIV status from sites in four low- and middle-income countries, using high-throughput data-independent acquisition mass-spectrometry (DIA-PASEF-MS).

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  • This study investigates the link between EEG-measured sleep patterns and depressive symptoms in older adults living in the community.
  • Researchers analyzed data from 66 older adults with sleep complaints, measuring their sleep using a sleep EEG device and depressive symptoms with the Geriatric Depression Scale.
  • The findings indicate that lighter sleep (stages N1 and N2), reduced deep sleep (N3), and more frequent awakenings are associated with increased depressive symptoms, suggesting that improving sleep quality could help reduce depression in this population.
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  • Peru is a significant player in the coffee market, ranking as the ninth-largest producer and the leading exporter of organic coffee globally, with a focus on how fermentation affects flavor.
  • This study explored the diversity of bacterial communities during different fermentation durations in northern Peru using advanced genetic sequencing techniques, highlighting the critical role of specific acid-tolerant bacteria in enhancing coffee quality.
  • Results showed that longer fermentation periods positively influence the sensory attributes of coffee by promoting the production of various enzymes and volatile compounds, suggesting that these processes could lead to higher-quality beans and offer new biotechnological opportunities.
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Introduction And Importance: Guidewire localization in breast conserving procedures is commonly performed. Although it is a relatively safe procedure, there are atypical complications that may occur. Here, we highlight a rare case of guidewire migration, affecting both the brain and spine.

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Several large-scale, pragmatic clinical trials on opioid use disorder (OUD) have been completed in the National Drug Abuse Treatment Clinical Trials Network (CTN). However, the resulting data have not been harmonized between the studies to compare the patient characteristics. This paper provides lessons learned from a large-scale harmonization process that are critical for all biomedical researchers collecting new data and those tasked with combining datasets.

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Purpose: To determine the role of Health Behaviors and Cognitive Emotion Regulation Strategies in the relationship between Health and Academic Stress.

Design: A cross-sectional study with in-person administration of questionnaires.

Setting: Data collection took place at nine public and private universities in Peru, involving a diverse group of students from different faculties.

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  • A study was conducted on neurology trainees' scholarly activities, focusing on factors affecting their ability to publish, including awareness of open access (OA) journals and financial barriers.
  • Out of 72 participants from various US neurology programs, many were familiar with OA publishing, but around 37.5% reported financial challenges; international medical graduates (IMGs) specifically faced greater hurdles and showed less motivation based on journal impact factors.
  • The study concluded that prior research experience and mentorship significantly aided trainees in successfully publishing, while dedicated time for scholarly work was highlighted as a substantial barrier.
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Background: Cervical cytology is recommended by WHO as a triage option in HPV-based cervical cancer screening programmes. We assessed the performance of cytology to detect CIN3+ without and with knowledge of HPV positivity.

Methods: Women were screened with cytology and HPV across ESTAMPA study centres in Latin America.

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The incidence of insulin resistance (IR) and hepatic steatosis is increasing, with dietary fiber playing a protective role against these disorders. Ocimum basilicum L., widely used in food, pharmaceutical, and cosmetic industries, but their health-promoting properties remain underexplored.

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  • The study aimed to analyze the global neurosurgery training workforce, focusing on the types of training programs, trainee support, diversity of experiences, and accreditation processes.
  • Data were collected from 187 countries and 25 territories, revealing an estimated 1,261 training programs and over 10,500 trainees, with significant variations in density based on country income levels and WHO regions.
  • High-income countries had a much higher density of trainees (0.48 per 100,000 people) compared to lower-income countries, which faced challenges like limited subspecialty training and resources.
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  • The study aimed to assess the global distribution and growth of consultant neurosurgeons, especially in low- and middle-income countries, to understand the impact of efforts to expand access to neurosurgery worldwide.
  • A comprehensive electronic survey was conducted across 192 countries and 25 territories, revealing an estimated 72,967 neurosurgeons, with a global density of 0.93 per 100,000 people, and significant variation by income level.
  • Findings indicated that neurosurgeon density increases with national income level, highlighting the shortage in low-income areas, particularly in WHO African and Southeast Asia regions, while the Western Pacific region showed the highest density of neurosurgeons.
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  • The study evaluated the agreement between three allergy testing methods—Peruvian Immunoblot, SPT (skin prick tests), and ALEX-2—in patients with allergic rhinitis in Arequipa, Peru.
  • 35 patients participated, with findings indicating varying sensitization rates for allergens not covered by the Immunoblot panel.
  • The results revealed stronger concordance between ALEX-2 and SPT compared to the agreement between Immunoblot and SPT.
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  • Approximately 40% of global tuberculosis cases go undiagnosed, with lower lung field TB (LLF TB) frequently misidentified as other lung issues, causing treatment delays.
  • An observational study in Lima, Peru, found that among 1316 pulmonary TB patients, 6% had LLF TB, which tended to be smear-negative, indicating a less typical presentation of the disease.
  • LLF TB patients showed less improvement in their respiratory health after 2 months of treatment, yet they had better final treatment outcomes compared to those with non-LLF TB, highlighting the need for optimized care for this specific group.
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The pet food industry is a growing business launching a variety of new products in the market. The acceptability or preference of pet food samples has traditionally been measured using either one-bowl or two-bowl tests. Academic researchers and professionals in the pet food industry have explored other methods, including the cognitive palatability assessment protocols and the ranking test, to evaluate more than two samples.

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