Publications by authors named "Nelson K"

Deep sequencing has revealed that the 16S rRNA gene composition of the human microbiome can vary between populations. However, when existing data are insufficient to address the desired study questions due to limited sample sizes, Dirichlet mixture modeling (DMM) can simulate 16S rRNA gene predictions from experimental microbiome data. We examined the extent to which simulated 16S rRNA gene microbiome data can accurately reflect the diversity within that identified from experimental data and calculate the power.

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Objectives: Intraoral scans of multiple implants in the edentulous arch are challenged by the absence of a distinct surface morphology between scan bodies. A scan aid was applied in such situation and evaluated for intraoral scanning accuracy in vivo.

Materials And Methods: 87 implants in 22 patients were scanned with scan aid (SA) and without scan aid (NO) using two different intraoral scanners (CS3600 [CS] and TRIOS3 [TR]).

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Background: Mailed fecal immunochemical testing (FIT) programs are increasingly utilized for population-based colorectal cancer (CRC) screening. Advanced notifications (primers) are one behavioral designed feature of many mailed FIT programs, but few have tested this feature among Veterans.

Objective: To determine if an advanced notification, a primer postcard, increases completion of FIT among Veterans.

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Article Synopsis
  • Immunologically cold tumors, which lack tumor-infiltrating lymphocytes, are typically resistant to immune checkpoint blockade, but local treatment with immunomodulatory agents can boost T cell responses and enhance overall effectiveness when combined with systemic therapies.
  • VAX014, a novel non-viral targeted oncolytic agent, was tested in preclinical models to analyze its local and systemic immunotherapeutic effects when injected directly into tumors, particularly focusing on improving outcomes in tumors characterized by an immune desert phenotype.
  • Results showed that VAX014 led to significant immune-mediated clearance of injected tumors, increased CD8 T cell populations, and enhanced immune responses, although responses in non-injected tumors were modest, especially when used alone compared to when combined with systemic immune
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Importance: Although cardiovascular disease (CVD) is the leading cause of death in the US, CVD risk factors remain suboptimally controlled.

Objective: To test the effectiveness of a home-visit, peer health coaching intervention to improve health outcomes for veterans with multiple CVD risks.

Design, Setting, And Participants: This 2-group, unblinded randomized clinical trial, called Vet-COACH (Veteran Peer Coaches Optimizing and Advancing Cardiac Health), used a novel geographic-based method to recruit a racially diverse population of veterans with low income.

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During cell division in , the highly conserved tubulin homolog FtsZ polymerizes and assembles into a ring-like structure, called the Z-ring, at the site of septation. For recruitment to the membrane surface, FtsZ polymers directly interact with membrane-associated proteins, predominantly FtsA in . FtsA shares structural homology with actin and, like actin, hydrolyzes ATP.

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Objectives: The objective of this study is to describe the United States and allied military medical response during the withdrawal from Afghanistan.

Background: The military withdrawal from Afghanistan concluded with severe hostilities resulting in numerous civilian and military casualties. The clinical care provided by coalition forces capitalized on decades of lessons learned and enabled unprecedented accomplishments.

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Skin of color in dermatology encompasses individuals of various ethnic backgrounds including Black or those of African descent, Hispanic or Latino, Asian, Native American, Pacific Islander, and those of mixed ethnicities. Because these populations continue to expand, more patients of color (POC) are seeking out cosmetic enhancements and treatments. Aside from cosmeceuticals, nonsurgical cosmetic rejuvenation options, such laser and light-based treatments, neurotoxins, soft tissue augmentation, and more recently body contouring and skin tightening, are becoming increasingly popular worldwide.

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The resolution of magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectra remains bounded by the spinning frequency, which is limited by the material strength of MAS rotors. Since diamond is capable of withstanding 1.5-2.

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We conducted a cross-sectional survey study of premedical undergraduate students at Howard University (Washington, DC), to evaluate the level of interest that underrepresented in medicine (UiM) premedical students have in the field of dermatology. The 19-question survey assessed student knowledge, opinions, and exposure to dermatology. Dermatology is an area of great interest for UiM premedical students that has few avenues available for exposure and learning.

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Endometriosis is an estrogen-dependent disorder defined as the deposition and growth of endometrial tissue outside the uterus, including but not limited to the pelvic peritoneum, rectovaginal septum, and ovaries. Endometriosis is a substantial contributor to pelvic pain and subfertility and has been associated with an increased incidence of certain cancers, including ovarian. Appropriate treatment of endometriosis can reduce morbidity, but generally is used only to address symptoms, since no cure currently exists.

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Relapse to drug seeking involves transient synaptic remodelling that occurs in response to drug-associated cues. This remodelling includes activation of matrix metalloproteinases (MMPs) to initiate catalytic signalling in the extracellular matrix in the nucleus accumbens core (NAcore). We hypothesized that MMP activity would be increased in the NAcore during cue-induced methamphetamine (meth) seeking in a rat model of meth use and relapse.

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Background: Over the past 10 years, job interview training has emerged as an area of study among adults with schizophrenia and other serious mental illnesses who face significant challenges when navigating job interviews. The field of mental health services research has limited access to assessments of job interview skills with rigorously evaluated psychometric properties.

Objective: We sought to evaluate the initial psychometric properties of a measure assessing job interview skills via role-play performance.

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The most prevalent modifiable risk factor for skin cancer is cumulative lifetime exposure to ultraviolet (UV) radiation, supporting the development of interventions promoting the early adoption of sun-protection behaviors. This systematic review summarizes behavioral interventions designed to promote sun-protection behaviors and reduce harmful UV exposure among U.S.

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Objective: This study aimed to explore self-management practices among patients and parents of children with sickle cell disease (SCD).

Methods: The qualitative descriptive design was employed. The study involved 19 participants comprising adult SCD patients ≥16 years, and nine parents of SCD children ≤ 15 years.

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Article Synopsis
  • Immune checkpoint inhibitor therapies can lead to skin-related immune issues, specifically a condition known as bullous pemphigoid (BP), but the exact causes of these reactions are not well understood.
  • A study compared biopsy samples from patients with BP related to immune therapy and those with regular BP, analyzing their gene expression and immune cell presence.
  • Findings showed that BP-irAE had increased levels of specific immune response genes and a higher presence of certain T-cells, while showing fewer regulatory T-cells, suggesting a distinct immune response mechanism in these cases.
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Hybrid perovskites have emerged as a promising material candidate for exciton-polariton (polariton) optoelectronics. Thermodynamically, low-threshold Bose-Einstein condensation requires efficient scattering to the polariton energy dispersion minimum, and many applications demand precise control of polariton interactions. Thus far, the primary mechanisms by which polaritons relax in perovskites remains unclear.

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At-home rapid antigen COVID-19 tests were first authorized by the Food and Drug Administration in late 2020 (1-3). In January 2022, the White House launched COVIDTests.gov, which made all U.

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Health care systems face challenges providing accessible health care across geographically disparate sites. The Veterans Health Administration (VHA) developed regional telemedicine service focusing initially on primary care and mental health services. The objective of this study is to describe the program and progress during the early implementation.

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Visualizing redox-active metal ions, such as Fe and Fe ions, are essential for understanding their roles in biological processes and human diseases. Despite the development of imaging probes and techniques, imaging both Fe and Fe simultaneously in living cells with high selectivity and sensitivity has not been reported. Here, we selected and developed DNAzyme-based fluorescent turn-on sensors that are selective for either Fe or Fe, revealing a decreased Fe/Fe ratio during ferroptosis and an increased Fe/Fe ratio in Alzheimer's disease mouse brain.

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Background: Psychopathology and risky behaviors increase during adolescence, and understanding which adolescents are most at risk informs prevention and intervention efforts. Pubertal timing relative to same-sex, same-age peers is a known correlate of adolescent outcomes among both boys and girls. However, it remains unclear whether this relation is better explained by a plausible causal process or unobserved familial liability.

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Importance: The COVID-19 pandemic caused significant disruptions in primary care delivery. The Veterans Health Administration (VHA) launched the Preventive Health Inventory (PHI) program-a multicomponent care management intervention, including a clinical dashboard and templated electronic health record note-to support primary care in delivering chronic disease care and preventive care that had been delayed by the pandemic.

Objectives: To describe patient, clinician, and clinic correlates of PHI use in primary care clinics and to examine associations between PHI adoption and clinical quality measures.

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Background: Caregivers of persons living with heart failure (HF) experience uncertainty related to heart failure trajectory and caregiving demands. Caregiver Support is a nurse-led intervention consisting of a well-being assessment, development of a life purpose statement, and action planning related to self-care and support for caregivers.

Objectives: The goal of this study was to describe the caregivers' action plans, action plan achievement and life purpose statements.

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Introduction: Skin cancer is a major public health concern in the United States, reflecting approximately one in every three cancer diagnoses. Despite the high incidence of skin cancer, access to dermatologists is limited, especially in rural areas. Primary care physicians play a pivotal role in the evaluation of skin conditions, but dermatology training gaps exist in primary care training programs.

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