Background: Patients, their family members and caregivers have firsthand experiences of living with or supporting someone living with a disease or medical condition. This knowledge by experience cannot be replaced by the knowledge acquired by clinicians, researchers, or other professionals through study and/or work. The Therapies for Long COVID in non-hospitalised individuals (TLC) research project was funded in the UK by the National Institute for Health and Care Research (NIHR) and UK Research and Innovation to investigate the impact of long COVID on affected individuals.
View Article and Find Full Text PDFBackground And Objectives: Physicians have long been considered valued members of a solid US health care system. Significant changes in medical education, health care, and society at-large suggest that current medical students may face a different future. To help guide educators and policy makers, we set out to understand medical students' perceptions of the future of health care and their place in it.
View Article and Find Full Text PDFThe function of DNA methylation in insects and the DNA methyltransferase (Dnmt) genes that influence methylation remains uncertain. We used RNA interference to reduce the gene expression of Dnmt1 within the whitefly Bemisia tabaci (Hemiptera:Aleyrodidae; Gennadius), a hemipteran species that relies on Dnmt1 for proper gametogenesis. We then used RNA-seq to test an a priori hypothesis that meiosis-related genetic pathways would be perturbed.
View Article and Find Full Text PDFObjectives: To assess changes in the monthly numbers of hospital-based abortions and outpatient early medical abortions in Victoria during January 2012 - March 2022, with a particular interest in the impact of the coronavirus disease 2019 (COVID-19) pandemic.
Study Design: Population-based retrospective cohort study; time series analysis of Victorian Admitted Episodes Dataset (VAED) and Pharmaceutical Benefits Scheme (PBS) data.
Setting, Participants: All admitted care episodes in Victoria during 1 January 2012 - 31 March 2022 with medical abortion as the principal diagnosis; all PBS claims for mifepristone-misoprostol (MS-2 Step) during 1 January 2015 (date of listing) - 31 March 2022.
A key component of parental care is avoiding killing and eating one's own offspring. Many organisms commit infanticide but switch to parental care when their own offspring are expected, known as temporal kin recognition. It is unclear why such types of indirect kin recognition are so common across taxa.
View Article and Find Full Text PDFPatient and public involvement and engagement (PPIE) can provide valuable insights into the experiences of those living with and affected by a disease or health condition. Inclusive collaboration between patients, the public and researchers can lead to productive relationships, ensuring that health research addresses patient needs. Guidelines are available to support effective PPIE; however, evaluation of the impact of PPIE strategies in health research is limited.
View Article and Find Full Text PDFBackground: The function of DNA methyltransferase genes of insects is a puzzle, because an association between gene expression and methylation is not universal for insects. If the genes normally involved in cytosine methylation are not influencing gene expression, what might be their role? We previously demonstrated that gametogenesis of Oncopeltus fasciatus is interrupted at meiosis following knockdown of DNA methyltransferase 1 (Dnmt1) and this is unrelated to changes in levels of cytosine methylation. Here, using transcriptomics, we tested the hypothesis that Dmnt1 is a part of the meiotic gene pathway.
View Article and Find Full Text PDFParental care is thought to evolve through modification of behavioral precursors, which predicts that mechanistic changes occur in the genes underlying those traits. The duplicated gene system of oxytocin/vasopressin has been broadly co-opted across vertebrates to influence parenting, from a preduplication ancestral role in water balance. It remains unclear whether co-option of these genes for parenting is limited to vertebrates.
View Article and Find Full Text PDFThe whitefly Bemisia tabaci is a globally important crop pest that is difficult to manage through current commercially available methods. While RNA interference (RNAi) is a promising strategy for managing this pest, effective target genes remain unclear. We suggest DNA methyltransferase 1 (Dnmt1) as a potential target gene due to its effect on fecundity in females in other taxa of insects.
View Article and Find Full Text PDFWhen the likelihood of reproducing successfully is low, any prior investment in developing oocytes may be wasted. One means of recouping this investment is oosorption - where ova are absorbed and resources salvaged so they can be re-allocated to other traits. Food-limited female speckled cockroaches (Nauphoeta cinerea) appear to use this strategy.
View Article and Find Full Text PDFNutrition is a dynamic environmental factor and compensatory growth may help animals handle seasonal fluctuations in their diets. Yet, how the dynamic changes in nutrition affect female reproduction is understudied. We took advantage of a specialist insect herbivore, Stål (Hemiptera: Coreidae), that feeds and reproduces on cactus across three seasons.
View Article and Find Full Text PDFMales have the ability to compete for fertilizations through both precopulatory and postcopulatory intrasexual competition. Precopulatory competition has selected for large weapons and other adaptations to maximize access to females and mating opportunities, while postcopulatory competition has resulted in ejaculate adaptations to maximize fertilization success. Negative associations between these strategies support the hypothesis that there is a trade-off between success at pre- and postcopulatory mating success.
View Article and Find Full Text PDFGiven the importance of DNA methylation in protection of the genome against transposable elements and transcriptional regulation in other taxonomic groups, the diversity in both levels and patterns of DNA methylation in the insects raises questions about its function and evolution. We show that the maintenance DNA methyltransferase, DNMT1, affects meiosis and is essential to fertility in milkweed bugs, , while DNA methylation is not required in somatic cells. Our results support the hypothesis that is required for the transition of germ cells to gametes in and that this function is conserved in male and female gametogenesis.
View Article and Find Full Text PDFWhiteflies (Hemiptera: Aleyrodidae) are sap-feeding global agricultural pests. These piercing-sucking insects have coevolved with intracellular endosymbiotic bacteria that help to supplement their nutrient-poor plant sap diets with essential amino acids and carotenoids. These obligate, primary endosymbionts have been incorporated into specialized organs called bacteriomes where they sometimes coexist with facultative, secondary endosymbionts.
View Article and Find Full Text PDFThe whitefly is a globally important pest that is difficult to control through insecticides, transgenic crops, and natural enemies. Post-transcriptional gene silencing through RNA interference (RNAi) has shown potential as a pest management strategy against . While genomic data and other resources are available to create highly effective customizable pest management strategies with RNAi, current applications do not capitalize on species-specific biology.
View Article and Find Full Text PDFInsect populations were studied within two commercial peanut shelling facilities located in the southeastern United States. Commercially available pheromone/kairomone-baited dome traps and pheromone-baited flight traps were deployed throughout processing and shipping portions of the shelling plants and serviced weekly over one year. spp.
View Article and Find Full Text PDFDrosophila suzukii is a globally invasive fruit pest that costs millions in yield losses and increased pest management costs. Management practices for D. suzukii currently rely heavily on calendar-based applications of broad-spectrum insecticides, but decision-based applications are theoretically possible with refined population modeling and monitoring.
View Article and Find Full Text PDFBackground: In species with parental care, there is striking variation in offspring dependence at birth, ranging from feeding independence to complete dependency on parents for nutrition. Frequently, highly dependent offspring further evolve reductions or alterations of morphological traits that would otherwise promote self-sufficiency. Here, we examine evidence for morphological evolution associated with dependence in burying beetles ( spp.
View Article and Find Full Text PDFBackground: The function of cytosine (DNA) methylation in insects remains inconclusive due to a lack of mutant and/or genetic studies.
Results: Here, we provide evidence for the functional role of the maintenance DNA methyltransferase 1 (Dnmt1) in an insect using experimental manipulation. Through RNA interference (RNAi), we successfully posttranscriptionally knocked down Dnmt1 in ovarian tissue of the hemipteran Oncopeltus fasciatus (the large milkweed bug).
males fed the ancestral diet of milkweed seeds prioritize reproduction over lifespan as evidenced by higher rates of fertility and shorter lifespans than males from the same population fed the adapted diet of sunflower seeds. We examined the proximate mechanisms by which milkweed-fed males maintained late-life fertility. We tested the hypothesis that older milkweed-fed males maintained fertility by producing more, higher quality sperm.
View Article and Find Full Text PDFBackground: Despite the general consensus that long-acting reversible contraceptives (LARCs) are the most appropriate choice of contraception for most women, there are special circumstances when the contraceptive and non-contraceptive needs of the patient are met by oral methods.
Objective: By using case histories, we seek to demonstrate the medical and practical complexities in managing contraceptive needs that may result in oral contraception being the most appropriate choice. The cases also illustrate the resources available to enable evidence-based management.