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"Hagan, Thomas"
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Serial founder effects slow range expansion in an invasive social insect
2024
Invasive populations often experience founder effects: a loss of genetic diversity relative to the source population, due to a small number of founders. Even where these founder effects do not impact colonization success, theory predicts they might affect the rate at which invasive populations expand. This is because secondary founder effects are generated at advancing population edges, further reducing local genetic diversity and elevating genetic load. We show that in an expanding invasive population of the Asian honey bee (
Apis cerana
), genetic diversity is indeed lowest at range edges, including at the
complementary sex determiner
,
csd
, a locus that is homozygous-lethal. Consistent with lower local
csd
diversity, range edge colonies had lower brood viability than colonies in the range centre. Further, simulations of a newly-founded and expanding honey bee population corroborate the spatial patterns in mean colony fitness observed in our empirical data and show that such genetic load at range edges will slow the rate of population expansion.
Invasive populations often have low genetic diversity because they originated from a small number of founding individuals. This study shows that in an invasive honey bee, one consequence of low genetic diversity is a reduced rate of population expansion due to serial founder effects at range edges.
Journal Article
mTOR regulates metabolic adaptation of APCs in the lung and controls the outcome of allergic inflammation
2017
Antigen-presenting cells (APCs) occupy diverse anatomical tissues, but their tissue-restricted homeostasis remains poorly understood. Here, working with mouse models of inflammation, we found that mechanistic target of rapamycin (mTOR)–dependent metabolic adaptation was required at discrete locations. mTOR was dispensable for dendritic cell (DC) homeostasis in secondary lymphoid tissues but necessary to regulate cellular metabolism and accumulation of CD103⁺ DCs and alveolar macrophages in lung. Moreover, while numbers of mTOR-deficient lung CD11b⁺ DCs were not changed, they were metabolically reprogrammed to skew allergic inflammation from eosinophilic T helper cell 2 (TH2) to neutrophilic TH17 polarity. The mechanism for this change was independent of translational control but dependent on inflammatory DCs, which produced interleukin-23 and increased fatty acid oxidation. mTOR therefore mediates metabolic adaptation of APCs in distinct tissues, influencing the immunological character of allergic inflammation.
Journal Article
Describing Self-Advocacy in Underrepresented Women With Advanced Cancer
2023
To describe the self-advocacy experiences of women from underrepresented groups who have advanced breast or gynecologic cancer.
To be eligible for the study, participants had to self-identify as vulnerable, which was defined as a member of a group considered at risk for poor cancer outcomes and underrepresented in clinical research.
This descriptive, longitudinal, qualitative study consisted of one-on-one interviews of women within three months of an advanced breast or gynecologic cancer diagnosis.
10 participants completed 25 interviews. The average age of participants was 60.2 years (range = 38-75 years). Three major themes emerged: (a) speaking up and speaking out, (b) interacting with the healthcare team, and (c) relying on support from others.
Women with advanced cancer who are from underrepresented groups self-advocated in unique ways, learning over time the importance of how to communicate their needs and manage their healthcare team. Future research should incorporate these findings into tailored self-advocacy interventions.
Journal Article
Drones Do Not Drift between Nests in a Wild Population of Apis cerana
2023
The modes through which individuals disperse prior to reproduction has important consequences for gene flow in populations. In honey bees (Apis sp.), drones (males) reproduce within a short flight range of their natal nest, leaving and returning each afternoon within a narrow mating window. Drones are assumed to return to their natal nests as they depend on workers to feed them. However, in apiaries, drones are reported to regularly make navigation errors and return to a non-natal nest, where they are accepted and fed by unrelated workers. If such a “drone drift” occurred in wild populations, it could facilitate some further degree of dispersal for males, particularly if drones drift into host nests some distance away from their natal nest. Here, we investigated whether drone drift occurs in an invasive population of the Asian honey bee (Apis cerana). Based on the genotypes of 1462 drones from 19 colonies, we found only a single drone that could be considered a candidate drifter (~0.07%). In three other colonies, drones whose genotypes differed from the inferred queen were best explained by recent queen turnover or worker-laying. We concluded that drone drift in this population is low at best, and A. cerana drones either rarely make navigation errors in wild populations or are not accepted into foreign nests when they do so. We therefore confirm that drone dispersal distance is limited to the distance of daily drone flights from natal nests, a key assumption of both colony density estimates based on sampling of drone congregation areas and population genetic models of gene flow in honey bees.
Journal Article
Analysis of Age-Friendly Cancer Care Readiness
2021
Cancer care attuned to meeting the needs of older adults is imperative to ensure that they receive appropriate levels of treatment in accordance with their goals of care. Achieving age-friendly systems and geriatric-competent workforces require rethinking current models of cancer care delivery. This article reports on a descriptive study on the readiness of U.S. cancer programs to provide age-friendly cancer care.
A survey was sent to 567 ambulatory oncology leaders in the United States. Of the 81 respondents, 61 answered all questions.
The authors developed and administered an online survey assessing cancer programs' age-friendly cancer care practices and readiness. Survey questions were based on the elements of the 4Ms framework. Results were analyzed using frequencies and percentages for categorically measured survey items and measures of central tendency for continuously scaled survey items.
67% of respondents reported that their program could deliver age-friendly cancer care within five years. Respondents less frequently indicated that they employed specific 4Ms elements.
The results of this study suggest gaps in readiness to implement age-friendly cancer care. Recommendations to improve readiness include increasing awareness, expanding workforce preparation, and improving cancer program leadership engagement.
Journal Article
Priorities to improve cancer caregiving: report of a caregiver stakeholder workshop
2021
PurposeCaregivers of people with cancer represent a large, overburdened, and under-recognized part of the cancer care workforce. Research efforts to address the unmet needs of these caregivers are expanding with studies focused on caregivers’ skill sets, physical and psychological health, and integration into healthcare delivery. As this field of research continues to expand, integrating caregivers’ input is vital to studies to ensure that research aligns with their experiences.MethodsThis is a focus group study of 15 cancer caregivers conducted during a cancer caregiving workshop at the University of Pittsburgh in February 2020. During the workshop, caregivers reviewed, critiqued, and proposed priorities to support caregivers of adults with cancer. We used a multistage consensus building approach to identify priority areas of research and clinical practice to address caregivers’ experiences and needs. We used descriptive content analysis to summarize caregivers’ priorities.ResultsCaregiver-identified priorities included (1) training and information about cancer and treatment, (2) caregiver integration into the patient’s healthcare delivery, (3) assistance with navigating the healthcare system, (4) focus on caregiver health and well-being, and (5) policy reform to address caregiver needs. We identified ways in which these priorities can inform cancer caregiving research and practice.ConclusionThese recommendations should be considered by researchers, clinicians, cancer center leadership, and policymakers interested in creating caregiver-focused research protocols, interventions, and support systems.
Journal Article
The Immune Signatures data resource, a compendium of systems vaccinology datasets
by
Sekaly, Rafick
,
Tomalin, Lewis
,
Rouphael, Nadine
in
Comparative analysis
,
Computer applications
,
DNA microarrays
2022
Vaccines are among the most cost-effective public health interventions for preventing infection-induced morbidity and mortality, yet much remains to be learned regarding the mechanisms by which vaccines protect. Systems immunology combines traditional immunology with modern ‘omic profiling techniques and computational modeling to promote rapid and transformative advances in vaccinology and vaccine discovery. The NIH/NIAID Human Immunology Project Consortium (HIPC) has leveraged systems immunology approaches to identify molecular signatures associated with the immunogenicity of many vaccines. However, comparative analyses have been limited by the distributed nature of some data, potential batch effects across studies, and the absence of multiple relevant studies from non-HIPC groups in ImmPort. To support comparative analyses across different vaccines, we have created the Immune Signatures Data Resource, a compendium of standardized systems vaccinology datasets. This data resource is available through ImmuneSpace, along with code to reproduce the processing and batch normalization starting from the underlying study data in ImmPort and the Gene Expression Omnibus (GEO). The current release comprises 1405 participants from 53 cohorts profiling the response to 24 different vaccines. This novel systems vaccinology data release represents a valuable resource for comparative and meta-analyses that will accelerate our understanding of mechanisms underlying vaccine responses.Measurement(s)Transcriptomics • Hemagglutination Inhibition Assay • IgG IgM IgA Total Measurement • Virus-neutralizing Antibody • ELISATechnology Type(s)Microarray • RNA sequencing • Hemagglutination Inhibition Assay • ELISA • Microneutralization Assay • serum neutralization of viral infectivity assaySample Characteristic - OrganismHomo sapiens
Journal Article
Oncology Nurses’ Role in Promoting Patient Self-Advocacy
by
Donovan, Heidi
,
Wesmiller, Susan
,
Hagan Thomas, Teresa
in
Advocacy
,
Beliefs, opinions and attitudes
,
Cancer
2022
Teaching patients with cancer the skill of self-advocacy shifts the focus of their cancer care onto what is important to them, leading to optimized patient-centered care. As oncology nurses, providing support to patients as they self-advocate to get their needs met fosters a collaborative relationship, creating an environment in which patients feel comfortable verbalizing their needs and concerns.
Journal Article
A Scoping Review on Work Experiences of Nurses After Being Diagnosed With Cancer
by
Cummings, Meredith H
,
Bender, Catherine M
,
Hagan Thomas, Teresa
in
Breast cancer
,
Humans
,
Keywords
2023
To map key concepts underpinning work-related studies about nurses with cancer and identify knowledge gaps.
A search was conducted in the PubMed®, CINAHL®, and PsycINFO® databases for articles about nurses with cancer and work-related topics published through March 2023.
The Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews Checklist was used to report results, and the JBI critical appraisal tools were used to assess the quality of studies. Eleven articles were included.
The following four critical concepts were identified: role adjustments at work, cancer impacts on work, organizational support, and translating insights gained from cancer experience into work. Research gaps identified by the scoping review were a lack of theoretical or conceptual frameworks, lack of syntheses of main ideas, and lack of clear data about participants' socioeconomic status across studies.
Minimal research exists to map predictors, outcomes, or intervention targets to guide organizational strategies to support nurses' retention in the nursing workforce. A guiding framework, recruitment of diverse nurses, and focus on the four critical concepts identified in this scoping review are suggested for future research.
Journal Article
Survivorship care planning in gynecologic oncology—perspectives from patients, caregivers, and health care providers
2018
PurposeThis qualitative study sought to describe the challenges following treatment and the preferences regarding survivorship care among patients treated for gynecological cancer, their caregivers, and health care providers.MethodsBetween July and August 2017, in-depth semi-structured interviews regarding survivorship were conducted at a large academic hospital in the USA among patients who recently completed treatment (< 12 months) for a gynecological cancer (ovarian, endometrial, cervical, and vulvar) and their primary caregivers. A focus group was conducted among health care providers (oncologists, nurses, and fellows). Main themes were identified using descriptive content analysis.ResultsA total of 30 individuals participated in this study (13 patients, 9 caregivers, 8 health care providers). Almost all participants reported a desire for more information on how to address survivorship needs, specifically as they related to side effects, follow-up schedule, and psychological assistance. Despite this uniformly identified need for more information, preferences for survivorship care planning differed across cancer types and individuals, with respect to content, timing, and mode of delivery. Health care providers expressed challenges in communicating with patients about survivorship, a desire to shift post-treatment conversations to the goal of improving quality of life as opposed to focusing on disease recurrence, and an unmet need for disease specific and individualized survivorship care planning.ConclusionsPatients, caregivers, and health care providers each expressed a need for gynecologic cancer-tailored survivorship care resources.Implications for Cancer SurvivorsThe variation of disease types and patient and caregiver needs may require multi-faceted, individualized survivorship care planning.
Journal Article