1,488 results match your criteria: "University of Puerto Rico-Río Piedras[Affiliation]"

'Frozen' virus genome sequences are sampled from outbreaks and have unusually low sequence divergence when compared to genome sequences from historical strains. A growing number of 'frozen' virus genome sequences are being reported as virus genome sequencing becomes more common. Examples of 'frozen' sequences include the 1977 H1N1 'Russian' flu; Venezuelan Equine Encephalitis Virus from Venezuela and Colombia in 1995; E71 sequences from a Hand, Foot and Mouth outbreak in 2007-2009 in China; and a polio strain isolated in 2014 from Anhui, China.

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Objective: Physical activity (PA) has been linked to reduced Alzheimer's disease (AD) risk. However, less is known about its effects in the AD preclinical stage. We aimed to investigate whether greater PA was associated with lower plasma biomarkers of AD pathology, neural injury, reactive astrocytes, and better cognition in individuals with autosomal-dominant AD due to the presenilin-1 E280A mutation who are virtually guaranteed to develop dementia.

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Targeting iron metabolism has emerged as a novel therapeutic strategy for the treatment of cancer. As such, iron chelator drugs are repurposed or specifically designed as anticancer agents. Two important chelators, deferasirox (Def) and triapine (Trp), attack the intracellular supply of iron (Fe) and inhibit Fe-dependent pathways responsible for cellular proliferation and metastasis.

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The Anopheles maculipennis complex consists of several mosquito species, including some primary malaria vectors. Therefore, the presence of a species in a particular area significantly affects public health. In this study, 1252 mosquitoes were collected in northern Italy, representing four identified species of the Anopheles maculipennis complex (Anopheles daciae sp.

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Is trauma associated with plant-based diet choice?

Appetite

December 2024

VA Boston Healthcare System, 150 South Huntington, Boston, MA, 02130, USA; National Center for PTSD, 150 South Huntington, Boston, MA, 02130, USA; Boston University School of Medicine, 72 East Concord St. Boston, MA, 02118, USA. Electronic address:

Examinations of links between plant-based diets (e.g., vegetarian and vegan diets) and indices of physical and mental health have received increased attention in the scientific literature in recent years.

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Tinoco A-Team Deferasirox (Def), an orally administered iron-chelating drug, has drawn significant interest in repurposing for anticancer application due to the elevated Fe demand by cancer cells. But there are also concerns about its severe off target health effects. Herein Cu(II) binding is studied as a potential off target interaction.

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Highly Pathogenic Avian Influenza strain H5N1 has caused a multi-state outbreak among US dairy cattle, spreading across 15 states and infecting hundreds of herds since its onset. We rapidly developed and optimized PCR-based detection assays and sequencing protocols to support H5N1 molecular surveillance. Using 214 retail milk from 20 states for methods development, we found that H5N1 concentrations by digital PCR strongly correlated with qPCR cycle threshold (Ct) values, with dPCR exhibiting greater sensitivity.

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Impact of Childhood Adversity on Late-Life Cognition in Older Puerto Rican Adults.

J Gerontol B Psychol Sci Soc Sci

December 2024

Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ, USA.

Objectives: This study examined the association between childhood adversity and late-life cognitive outcomes among older Puerto Rican adults.

Methods: Data were from the PREHCO study, a population-based cohort of 3,713 older Puerto Rican adults (mean age 72.5 years; 60% female).

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Objective: Evaluate the relationship between diabetes and hypertension and COVID-19 booster uptake.

Methods: Members of the Community Outreach Group of the Puerto Rico Community Engagement Alliance Against COVID-19 Disparities (PR-CEAL) administered a survey at 229 community events between November 2021 and May 2023. Information on 2,145 participants' sociodemographic information and chronic disease diagnoses was gathered.

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The abuse of psychoactive substances poses a critical public health challenge in Puerto Rico, with far-reaching implications for both individuals and society as a whole. This article provides a comprehensive overview of the patterns and trends associated with drug abuse in Puerto Rico, focusing on alcohol, tobacco, cannabis, benzodiazepines, opioids, and methadone. Recent statistics reveal a concerning increase in substance abuse, particularly among young adults.

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Background And Aims: Tropical forests exchange more carbon dioxide (CO2) with the atmosphere than any other terrestrial biome. Yet, uncertainty in the projected carbon balance over the next century is roughly three-times greater for the tropics than other ecosystems. Our limited knowledge of tropical plant physiological responses, including photosynthetic, to climate change is a substantial source of uncertainty in our ability to forecast the global terrestrial carbon sink.

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Article Synopsis
  • Demographic rescue involves adding individuals to endangered populations to boost their numbers and prevent extinction, but its effectiveness is uncertain in the presence of diseases.
  • A study was conducted using an aquatic crustacean, Daphnia dentifera, and a fungus pathogen, Metschnikowia bicuspidata, to investigate how pathogens affect demographic rescue outcomes.
  • Results showed that while adding healthy individuals temporarily increased population size, populations with infected individuals ultimately had significantly lower abundance compared to those with no intervention, highlighting the risks of introducing diseased organisms during rescue efforts.*
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With energy shortages and excessive CO emissions driving climate change, converting CO into high-value-added products offers a promising solution for carbon recycling. We investigate CO reduction reactions (CORR) catalyzed by 10 single-atom catalysts (SACs), incorporating weak non-covalent interactions, specifically lone pair-π and H-π interactions. The SACs, consisting of transition metals coordinated by three carbon atoms in a defective graphene substrate (3C-TM, TM=Sc-Zn), leverage these interactions to influence the energy fluctuations of intermediates and the limiting potentials of CORR, without altering the overall reaction pathway.

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Aqueous trivalent metal batteries are promising options for energy storage, owing to their ability to transfer three electrons during redox reactions. However, advances in this field have been limited by challenges such as incompatible M/M electrode potentials and salt hydrolysis. Herein, we identify the trivalent indium metal as a viable candidate and demonstrate a high-performance indium-Prussian blue hybrid battery using a K/In mixture electrolyte.

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Article Synopsis
  • Religiosity plays a significant role in promoting human well-being and influencing health, serving both protective and risk factors.
  • The Duke University Religion Index (DUREL) is a widely used tool for measuring various dimensions of religiosity, consisting of five items that evaluate organizational, non-organizational, and intrinsic aspects.
  • A study involving 411 Puerto Rican adults confirmed the DUREL's reliability and validity, establishing it as an effective measure for assessing religiosity within this community.
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This study addresses the persistent challenge of polysulfide dissolution in lithium-sulfur (Li-S) batteries by introducing magnesium oxide (MgO) nanoparticles as a novel additive. MgO was integrated with sulfur using a scalable process involving solid-state melt diffusion treatment followed by planetary ball milling. XRD measurements confirmed that sulfur (S) retains its orthorhombic crystalline structure (space group Fddd) following the MgO incorporation, with minimal peak shifts indicating slight lattice distortion, while the increased peak intensity suggests enhanced crystallinity due to MgO acting as a nucleation site.

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Amidst the swift expansion of the electric vehicle industry, the imperative for alternative battery technologies that balance economic feasibility with sustainability has reached unprecedented importance. Herein, we utilized Perovskite-based oxide compounds barium titanate (BaTiO) and strontium titanate (SrTiO) nanoparticles as anode materials for lithium-ion batteries from straightforward and standard carbonate-based electrolyte with 10% fluoroethylene carbonate (FEC) additive [1M LiPF (1:1 EC: DEC) + 10% FEC]. SrTiO and BaTiO electrodes can deliver a high specific capacity of 80 mA h g at a safe and low average working potential of ≈0.

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Deferasirox's Anti-Chemoresistance and Anti-Metastatic Effect on Non-Small Cell Lung Carcinoma.

Biomedicines

October 2024

Department of Anatomy and Neurobiology, School of Medicine, University of Puerto Rico, Medical Sciences Campus, San Juan, PR 00936, USA.

Clinically approved iron chelators, originally designed to address iron overload disorders, have emerged as potential anticancer agents. Deferasirox (Def), a tridentate iron chelator, has demonstrated antiproliferative effects in cancer. : This study aims to elucidate the mechanism of action of Def and its impact on non-small cell lung carcinoma (NSCLC).

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REVEALS: an open-source multi-camera GUI for rodent behavior acquisition.

Cereb Cortex

October 2024

Neurobiology Section in the Department of Biology, Boston University, Boston, MA, United States.

Article Synopsis
  • Understanding mouse behavior is essential for studying brain functions, but current methods for collecting this data are inadequate and costly.
  • REVEALS (Rodent Behavior Multi-Camera Laboratory Acquisition) is a new software tool that allows researchers to easily record and manage rodent behavior using multiple USB3 cameras.
  • This open-source framework enhances existing data analysis pipelines and improves the collection of large behavioral datasets, helping scientists identify complex behaviors efficiently.
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Silicon (Si) has attracted worldwide attention for its ultrahigh theoretical storage capacity (4200 mA h g), low mass density (2.33 g cm), low operating potential (0.4 V vs.

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Article Synopsis
  • The discovery of regulated cell death (RCD) transformed chemotherapy, shifting focus from solely targeting caspase-dependent apoptosis to exploring other forms of RCD due to limitations like drug resistance and lack of cancer specificity.
  • Recent findings about ferroptosis, a new iron-dependent cell death pathway, show it has potential as a therapeutic tool against cancer.
  • Research is ongoing to understand how the balance of iron, copper, and zinc affects ferroptosis and how coordination chemistry can be used to enhance this process in cancer treatment.
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Article Synopsis
  • The NeuroID program, funded by NINDS, has trained many undergraduate Hispanic students at UPR-RP over the last 14 years in neuroscience research.
  • It has successfully prepared these students for graduate programs and enhanced diversity in academia and science.
  • The program focuses on three main objectives: providing research career insights, establishing mentorship networks, and connecting local universities with prestigious research institutions in the U.S.
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The Relationship Between Maturation Size and Maximum Tree Size From Tropical to Boreal Climates.

Ecol Lett

September 2024

Universite Grenoble Alpes, Institut National de Recherche Pour Agriculture, Alimentation et Environnement (INRAE), Laboratoire EcoSystemes et Societes En Montagne (LESSEM), Grenoble, France.

Article Synopsis
  • - The study examines the relationship between tree maturation size and reproduction, finding that larger tree species tend to start reproducing at a smaller size than expected, challenging previous assumptions.
  • - Researchers analyzed seed production data from 486 tree species across different climates, revealing that maturation size increases with maximum size but not in a straightforward manner.
  • - The results indicate that this trend is particularly pronounced in colder climates, highlighting the importance of understanding maturation size to better predict how forests will respond to climate change and disturbances.
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Article Synopsis
  • HIV-1 infects macrophages that release neurotoxic substances like cathepsin B (CATB), leading to cognitive issues, with cocaine enhancing this effect.
  • Treatment with BD1047, a sigma-1 receptor antagonist, prior to cocaine exposure lowers HIV-1 replication and CATB secretion, reducing neuronal cell death.
  • Proteomic analysis revealed that BD1047 dysregulated 80 proteins related to HIV-1, CATB, and mitochondrial functions, suggesting it helps protect cells by improving mitochondrial health and reducing neurotoxicity.
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Article Synopsis
  • The study examines patient activation, which refers to the willingness of individuals to manage their health, focusing on childhood cancer survivors and its effect on psychological outcomes and health behaviors.
  • Among 2,708 childhood cancer survivors, lower levels of activation were observed compared to the control group, with survivors demonstrating more instances of low activation and fewer high activation levels.
  • The results indicate that higher activation is linked to better mental health, quality of life, and adherence to physical activity guidelines, suggesting that enhancing patient activation could provide significant benefits for survivors' overall well-being.
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