Publications by authors named "Guerra C"

Soil is one of the most biodiverse terrestrial habitats. Yet, we lack an integrative conceptual framework for understanding the patterns and mechanisms driving soil biodiversity. One of the underlying reasons for our poor understanding of soil biodiversity patterns relates to whether key biodiversity theories (historically developed for aboveground and aquatic organisms) are applicable to patterns of soil biodiversity.

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Although cancer mortality rates declined in the United States in recent decades, some populations experienced little benefit from advances in cancer prevention, early detection, treatment, and survivorship care. In fact, some cancer disparities between populations of low and high socioeconomic status widened during this period. Many potentially preventable cancer deaths continue to occur, and disadvantaged populations bear a disproportionate burden.

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Soil organisms, including earthworms, are a key component of terrestrial ecosystems. However, little is known about their diversity, their distribution, and the threats affecting them. We compiled a global dataset of sampled earthworm communities from 6928 sites in 57 countries as a basis for predicting patterns in earthworm diversity, abundance, and biomass.

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Squamates exhibit a vast diversity of body plans, which directly determines habitat use and preference. Here the skeleton of the sand-swimmer burrower gymnophthalmid, Calyptommatus leiolepis, is analyzed to investigate how its peculiar fossorial locomotion affects its osteology. Calyptommatus leiolepis is a limb-reduced, short-intermediate tailed lizard.

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Direct synthetic routes to amidines are desired, as they are widely present in many biologically active compounds and organometallic complexes. -Acyl amidines in particular can be used as a starting material for the synthesis of heterocycles and have several other applications. Here, we describe a fast and practical copper-catalyzed three-component reaction of aryl acetylenes, amines, and easily accessible 1,4,2-dioxazol-5-ones to -acyl amidines, generating CO as the only byproduct.

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Correction for 'New light on an old debate: does the RCN-PtCl bond include any back-donation? RCN ← PtCl backbonding vs. the IR ν blue-shift dichotomy in organonitriles-platinum(ii) complexes. A thorough density functional theory - energy decomposition analysis study' by Girolamo Casella et al.

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Background: Housing mapping and household enumeration are essential for the planning, implementation, targeting, and monitoring of malaria control interventions. In many malaria endemic countries, control efforts are hindered by incomplete or non-existent housing cartography and household enumeration. This paper describes the development of a comprehensive mapping and enumeration system to support the Bioko Island Malaria Control Project (BIMCP).

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Background & Aims: The exocrine pancreas consists of acinar cells that produce digestive enzymes transported to the intestine through a branched ductal epithelium. Chronic pancreatitis is characterized by progressive inflammation, fibrosis, and loss of acinar tissue. These changes of the exocrine tissue are risk factors for pancreatic cancer.

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Background: Plasmodium vivax exacts a significant toll on health worldwide, yet few efforts to date have quantified the extent and temporal trends of its global distribution. Given the challenges associated with the proper diagnosis and treatment of P vivax, national malaria programmes-particularly those pursuing malaria elimination strategies-require up to date assessments of P vivax endemicity and disease impact. This study presents the first global maps of P vivax clinical burden from 2000 to 2017.

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The physiological decline of lactase production in adulthood, in some individuals, is responsible for the so-called "Lactose Intolerance." This clinical syndrome presents with gastrointestinal and non-gastrointestinal symptoms following the consumption of dairy containing food. Lactose intolerance can be evaluated by means of the Lactose Breath Test (phenotype) and/or genetic evaluation of lactase-gene polymorphism (genotype).

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Background: This study aimed to analyse the impact that web-based distance learning has on knowledge gain in medical students, as well as student perceptions of the methodology.

Methods: This was an educational intervention study conducted at a tertiary teaching hospital in the city of São Paulo, Brazil. From 2008 to 2014, we offered a free web-based distance learning course, covering antimicrobial use and microbial resistance, to fifth-year medical students.

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Warfarin, for many years, was the only oral anticoagulant availablt on the market for the prevention of stroke in patients with atrial fibrillation. Despite being safe and effective, warfarin's medication and food interactions, along with its requirement for frequent monitoring, make it ltss ideal in some patient populations. More recently, non-vitamin K oral antagonists (NOACs) have emergtd as an appealing option as they have fewer medication interactions, do not have food interactions and do not require frequent monitoring.

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Malaria burden on Bioko Island has decreased significantly over the past 15 years. The impact of interventions on malaria prevalence, however, has recently stalled. Here, we use data from island-wide, annual malaria indicator surveys to investigate human movement patterns and their relationship to Plasmodium falciparum prevalence.

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The use of biosimilar drugs for multiple sclerosis (MS) has become widespread in Latin America, with the goal of reducing costs of treatments, promoting the sustainability of healthcare systems, and improving patient access to these therapies. There is currently a need to define and comply with requirements to guarantee the efficacy, safety, and quality of these drugs. Thus, the objective of the present study was to compile up-to-date information from each Latin American country assessed on (a) approval of biosimilar drugs by regulatory agencies; (b) use of biosimilar drugs, pharmacovigilance plans, risk management; and (c) update in the knowledge on different molecules.

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Article Synopsis
  • Resveratrol, a compound found in grapes, has been shown to reduce tumor cell growth in bladder cancer, but its exact mechanisms are still unclear.
  • The study investigated how resveratrol (at various concentrations) affects bladder cancer cells with different TP53 gene mutations, revealing it decreases cell proliferation and induces DNA damage.
  • Results showed that the type of TP53 status influences resveratrol’s effects, with wild type TP53 cells showing increased apoptosis and altered gene expressions while mutated TP53 cells experienced cell cycle arrest.
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Objective: To characterize the lingual frenulum of full-term newborns using two different protocols and to assess the association of the lingual frenulum with breastfeeding.

Methods: This non-probabilistic sample consisted of 449 mother/baby binomials. For the anatomo-functional evaluation of the frenulum, the Neonatal Tongue Screening Test and the Bristol Tongue Assessment Tool were used for the evaluation of the lingual frenulum.

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Five-year survival for pancreatic ductal adenocarcinoma (PDAC) patients remains below 7% due to the lack of effective treatments. Here, we report that combined ablation of EGFR and c-RAF expression results in complete regression of a significant percentage of PDAC tumors driven by Kras/Trp53 mutations in genetically engineered mice. Moreover, systemic elimination of these targets induces toxicities that are well tolerated.

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Human activities are accelerating global biodiversity change and have resulted in severely threatened ecosystem services. A large proportion of terrestrial biodiversity is harbored by soil, but soil biodiversity has been omitted from many global biodiversity assessments and conservation actions, and understanding of global patterns of soil biodiversity remains limited. In particular, the extent to which hotspots and coldspots of aboveground and soil biodiversity overlap is not clear.

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The secondary electrostatic interaction (SEI) model is often used to predict and explain relative hydrogen bond strengths of self-assembled systems. The SEI model oversimplifies the hydrogen-bonding mechanisms by viewing them as interacting point charges, but nevertheless experimental binding strengths are often in line with the model's predictions. To understand how this rudimentary model can be predictive, we computationally studied two tautomeric quadruple hydrogen-bonded systems, DDAA-AADD and DADA-ADAD.

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Objective: Evaluate a community-based navigator intervention to increase breast cancer patients' and survivors' access to information about health research participation opportunities.

Methods: In the context of a Community Based Participatory Research collaboration, we conducted a prospective randomized controlled trial of the Health Research Engagement Intervention with pre- and post-intervention surveys (n = 133). The primary outcome was health research information-seeking behavior.

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Effective communication, where all parties share a common understanding, is necessary to realize the promise of Genomic Medicine. It is especially salient given the imperative to increase the participation of diverse populations in genomics research and to expand the reach of clinical genomics. We have previously shown that cancer genetic counseling is suboptimal for patients with limited health literacy.

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Introduction: Leukopenia in renal transplant recipients occurs commonly within the first year following transplantation; however, literature on the effects of age on leukopenia is scarce.

Design: A single-center, retrospective review was conducted on 141 recipients transplanted from January 2011 to December 2015. Transplant recipients were characterized by age <60 years (n = 94) or age 60 years and older (n = 47) for analysis.

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A systematic review was performed to evaluate whether whitening toothpastes promote tooth whitening when compared to the use of conventional (nonbleaching) dentifrices. This review was registered at PROSPERO (CRD42017065132) and is based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses. Electronic systematic searches of PubMed/MEDLINE, Scopus, and the Cochrane Library were conducted for published articles.

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