Publications by authors named "Calero P"

Background: Government programs-targeting chronic disease patients with high health care costs-focus on clinical conditions, factors internal to the health care system, and individual patient education, not on addressing modifiable social determinants of health to reduce health care utilization.

Objective: To evaluate differences in sociodemographic variables and health care utilization between patients with chronic obstructive pulmonary disease (COPD) who reported food insecurity and those who did not.

Methods: This descriptive retrospective cross-sectional study used data from the electronic health records of a convenience sample of 854 participants with a discharge diagnosis of COPD or COPD with acute exacerbation, admitted via the emergency department of participating hospitals in Southern California.

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Introduction: Nurses and respiratory therapists working on the frontline during the pandemic surge were short-staffed and worked extended hours while adding new tasks to already demanding workloads. As the world watched news covering COVID-19's effect, nurses and respiratory therapists lived through the daily stress of treating each patient with care, dignity, and compassion. Limited studies have focused on this population, which is vital to providing care and saving lives; research is needed to understand nurses' and respiratory therapists' experiences during the COVID-19 pandemic.

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Objective: Eslicarbazepine acetate (ESL) is a once-daily oral antiseizure medication. Its safety and tolerability from clinical trials have been mostly confirmed by real-world data. The main purpose of this report is to provide an overview of the safety profile of ESL in the United Kingdom (UK) and Republic of Ireland (ROI).

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Objective: COVID-19 disproportionally affected Hispanic/Latinx populations exacerbating systemic health inequities. The pilot study aimed to explore barriers to COVID-19 vaccination across Hispanic/Latinx communities in Southern California.

Methods: Cross-sectional survey of 200 participants to identify common barriers to vaccine hesitancy among Hispanics/Latinx individuals in Southern California utilizing a 14-item survey and questionnaire in English and Spanish.

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Objectives: To examine the effect of oncology nurse navigators (ONNs) on the number of emergency department (ED) visits and hospital admissions (HAs) of adults with cancer post-outpatient chemotherapy.

Sample & Setting: 1,370 patients with cancer between January 1, 2018, and December 31, 2019, in a comprehensive community cancer center in southern California.

Methods & Variables: A descriptive cross-sectional study was conducted using retrospective electronic health records.

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Background: Falls are the most prevalent adverse event among hospitalized patients. Multilevel risk factors are associated with falls, yet falls continue.

Purpose: To evaluate the relationship between the Johns Hopkins Fall Risk instrument, patient characteristics, and perception of fall risk.

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The presence of mineral fluoride (F ) in the environment has both a geogenic and anthropogenic origin, and the halide has been described to be toxic in virtually all living organisms. While the evidence gathered in different microbial species supports this notion, a systematic exploration of the effects of F salts on the metabolism and physiology of environmental bacteria remained underexplored thus far. In this work, we studied and characterized tolerance mechanisms deployed by the model soil bacterium Pseudomonas putida KT2440 against NaF.

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Fluorinases, the only enzymes known to catalyze the transfer of fluorine to an organic molecule, are essential catalysts for the biological synthesis of valuable organofluorines. However, the few fluorinases identified so far have low turnover rates that hamper biotechnological applications. Here, we isolated and characterized putative fluorinases retrieved from systematic in silico mining and identified a nonconventional archaeal enzyme from sp.

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Objective: To examine the relationships among depression and anxiety symptomatology, stigma of mental illness, levels of social support, and select demographics among hospitalized women in the postpartum period.

Design: Descriptive, cross-sectional, correlational.

Setting: A convenience sample of 105 English-speaking and Spanish-speaking women was recruited and enrolled from a 208-bed free-standing Southern California women's community hospital postpartum unit serving a diverse community.

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The fluorinase enzyme represents the only biological mechanism capable of forming stable C-F bonds characterized in nature thus far, offering a biotechnological route to the biosynthesis of value-added organofluorines. The fluorinase is known to operate in a hexameric form, but the consequence(s) of the oligomerization status on the enzyme activity and its catalytic properties remain largely unknown. In this work, this aspect was explored by rationally engineering trimeric fluorinase variants that retained the same catalytic rate as the wild-type enzyme.

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Objectives: There is extensive literature from various disciplines on , an important aspect of nursing intervention via evaluation and education, but its meaning remains unprecise due to the difficulty integrating the diverse definitions developed over time across disciplines. Therefore, it is vital to clarify the meaning of self-care and formulate the defining attributes, antecedents, and consequences to self-care.

Methods: Walker and Avant's concept analysis approach was used to analyze the concept of self-care.

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Increasing patient activation facilitates self-management of health, improves health outcomes, and lowers health care expenditures. Extant research notes mixed findings in patient activation by race/ethnicity. The purpose of the study was to examine the relationships among patient activation, select patient characteristics, and glycemic control among Filipino Americans.

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Fluorine is a key element in the synthesis of molecules broadly used in medicine, agriculture and materials. Addition of fluorine to organic structures represents a unique strategy for tuning molecular properties, yet this atom is rarely found in Nature and approaches to integrate fluorometabolites into the biochemistry of living cells are scarce. In this work, synthetic gene circuits for organofluorine biosynthesis are implemented in the platform bacterium Pseudomonas putida.

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In contrast to the current paradigm of using microbial mono-cultures in most biotechnological applications, increasing efforts are being directed towards engineering mixed-species consortia to perform functions that are difficult to programme into individual strains. In this work, we developed a synthetic microbial consortium composed of two genetically engineered microbes, a cyanobacterium (Synechococcus elongatus PCC 7942) and a heterotrophic bacterium (Pseudomonas putida EM173). These microbial species specialize in the co-culture: cyanobacteria fix CO through photosynthetic metabolism and secrete sufficient carbohydrates to support the growth and active metabolism of P.

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Post-traumatic stress disorder (PTSD) is an important and often neglected comorbidity of pregnancy; left untreated, it can lead to serious health complications for the mother and developing fetus. Structured interviews were conducted to identify risk factors of PTSD among culturally diverse women with depressive symptomatology receiving perinatal services at community obstetric/gynecologic clinics. Women abused as adults, with two or more instances of trauma, greater trauma severity, insomnia, and low social support were more likely to present perinatal PTSD symptoms.

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The last few years have witnessed an unprecedented increase in the number of novel bacterial species that hold potential to be used for metabolic engineering. Historically, however, only a handful of bacteria have attained the acceptance and widespread use that are needed to fulfil the needs of industrial bioproduction - and only for the synthesis of very few, structurally simple compounds. One of the reasons for this unfortunate circumstance has been the dearth of tools for targeted genome engineering of bacterial chassis, and, nowadays, synthetic biology is significantly helping to bridge such knowledge gap.

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Biofilm dispersal is a genetically programmed response enabling bacterial cells to exit the biofilm in response to particular physiological or environmental conditions. In Pseudomonas putida biofilms, nutrient starvation triggers c-di-GMP hydrolysis by phosphodiesterase BifA, releasing inhibition of protease LapG by the c-di-GMP effector protein LapD, and resulting in proteolysis of the adhesin LapA and the subsequent release of biofilm cells. Here we demonstrate that the stringent response, a ubiquitous bacterial stress response, is accountable for relaying the nutrient stress signal to the biofilm dispersal machinery.

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Article Synopsis
  • - The soil bacterium Pseudomonas putida KT2440 shows notable ability to tolerate various toxic chemicals, outperforming Escherichia coli in its ability to withstand three of eleven tested compounds, including p-coumaric acid, which has significant industrial applications.
  • - Researchers used a genome-wide method called Tn-seq to explore how P. putida KT2440 tolerates p-coumaric acid, analyzing a large set of mutant strains to see which were more or less successful in the presence of this compound.
  • - Key findings revealed that several genes, particularly the ABC transporter Ttg2ABC and components of the cytochrome c maturation system, are crucial for maintaining membrane stability and transport processes, linking
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Astrocytes play crucial roles in brain homeostasis and are emerging as regulatory elements of neuronal and synaptic physiology by responding to neurotransmitters with Ca elevations and releasing gliotransmitters that activate neuronal receptors. Aging involves neuronal and astrocytic alterations, being considered risk factor for neurodegenerative diseases. Most evidence of the astrocyte-neuron signaling is derived from studies with young animals; however, the features of astrocyte-neuron signaling in adult and aging brain remain largely unknown.

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Article Synopsis
  • Understanding microbial bioconversion for producing bulk chemicals and biofuels is crucial, as high product levels can lead to toxicity; hence, improving strain tolerance is key.
  • A systems biology approach revealed E. coli's response to various chemical stressors, identifying 12 chemicals with production potential and significant changes in several metabolic functions and key regulatory genes.
  • Genome-wide screening of mutants under chemical stress showed that specific genetic changes can enhance growth rates by up to 60%, offering insights into potential targets for engineering more resilient E. coli strains.
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Most bacteria alternate between a free living planktonic lifestyle and the formation of structured surface-associated communities named biofilms. The transition between these two lifestyles requires a precise and timely regulation of the factors involved in each of the stages that has been likened to a developmental process. Here we characterize the involvement of the transcriptional regulator FleQ and the second messenger cyclic diguanylate in the coordinate regulation of multiple functions related to motility and surface colonization in Pseudomonas putida.

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Pseudomonas putida KT2440 has gained increasing interest as a host for the production of biochemicals. Because of the lack of a systematic characterization of inducible promoters in this strain, we generated ProUSER broad-host-expression plasmids that facilitate fast uracil-based cloning. A set of ProUSER-reporter vectors was further created to characterize different inducible promoters.

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We previously showed the isolation of biofilmpersistent Pseudomonas putida mutants that fail to undergo biofilm dispersal upon entry in stationary phase. Two such mutants were found to bear insertions in PP0914, encoding a GGDEF/EAL domain protein with high similarity to Pseudomon asaeruginosa BifA. Here we show the phenotypic characterization of a ΔbifA mutant in P.

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