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Sökning: LAR1:gu > Forskningsöversikt

  • Resultat 11-20 av 2518
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11.
  • Abu-Raya, Bahaa, et al. (författare)
  • Antibody and B-cell Immune Responses Against Bordetella Pertussis Following Infection and Immunization
  • 2023
  • Ingår i: Journal of Molecular Biology. - 0022-2836 .- 1089-8638. ; 435:24
  • Forskningsöversikt (refereegranskat)abstract
    • Neither immunization nor recovery from natural infection provides life-long protection against Bordetella pertussis. Replacement of a whole-cell pertussis (wP) vaccine with an acellular pertussis (aP) vaccine, mutations in B. pertussis strains, and better diagnostic techniques, contribute to resurgence of number of cases especially in young infants. Development of new immunization strategies relies on a comprehensive understanding of immune system responses to infection and immunization and how triggering these immune components would ensure protective immunity. In this review, we assess how B cells, and their secretory products, antibodies, respond to B. pertussis infection, current and novel vaccines and highlight similarities and differences in these responses. We first focus on antibody-mediated immunity. We discuss antibody (sub)classes, elaborate on antibody avidity, ability to neutralize pertussis toxin, and summarize different effector functions, i.e. ability to activate complement, promote phagocytosis and activate NK cells. We then discuss challenges and opportunities in studying B-cell immunity. We highlight shared and unique aspects of B-cell and plasma cell responses to infection and immunization, and discuss how responses to novel immunization strategies better resemble those triggered by a natural infection (i.e., by triggering responses in mucosa and production of IgA). With this comprehensive review, we aim to shed some new light on the role of B cells and antibodies in the pertussis immunity to guide new vaccine development.
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12.
  • Acuña Mora, Mariela, et al. (författare)
  • Definitions, instruments and correlates of patient empowerment : A descriptive review
  • 2021
  • Ingår i: Patient Education and Counseling. - : Elsevier. - 0738-3991 .- 1873-5134.
  • Forskningsöversikt (refereegranskat)abstract
    • Objective: This review aimed to: (i) inventory the definitions and measurements of patient empowerment in healthcare literature; (ii) appraise the conceptual and methodological rigor of included studies; and (iii) identify correlates of patient empowerment in persons with chronic conditions.Methods: Four databases were searched to identify articles measuring patient empowerment in persons with chronic conditions, used a quantitative design and provided evidence on correlates of patient empowerment. Seventy-six articles were included and analyzed by descriptive statistics and summative content analysis.Results: The articles used a range of definitions (n = 35) and instruments (n = 38), evaluating a range of correlates in four categories: sociodemographic characteristics, clinical outcomes, patient-reported outcomes and patient-reported experiences. The most frequent associations were between patient empowerment and age (n = 21), sex (n = 15), educational level (n = 15) and quality of life (n = 18). However, they were not always significant.Conclusion: The broad variation of definitions and instruments highlights the lack of consensus on how to interpret and measure patient empowerment. Although several covariates have been evaluated, there are few studies assess the same relationships.Practice implications: Consensus on a definition and measurement of patient empowerment is needed to improve the quality of future research and to provide a more cohesive body of knowledge. 
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13.
  • Adam, Sumaiya, et al. (författare)
  • Pregnancy as an opportunity to prevent type 2 diabetes mellitus: FIGO Best Practice Advice.
  • 2023
  • Ingår i: International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics. - 1879-3479. ; 160:Suppl 1, s. 56-67
  • Forskningsöversikt (refereegranskat)abstract
    • Gestational diabetes (GDM) impacts approximately 17 million pregnancies worldwide. Women with a history of GDM have an 8-10-fold higher risk of developing type 2 diabetes and a 2-fold higher risk of developing cardiovascular disease (CVD) compared with women without prior GDM. Although it is possible to prevent and/or delay progression of GDM to type 2 diabetes, this is not widely undertaken. Considering the increasing global rates of type 2 diabetes and CVD in women, it is essential to utilize pregnancy as an opportunity to identify women at risk and initiate preventive intervention. This article reviews existing clinical guidelines for postpartum identification and management of women with previous GDM and identifies key recommendations for the prevention and/or delayed progression to type 2 diabetes for global clinical practice.
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14.
  • Adam, Sumaiya, et al. (författare)
  • Pregnancy as an opportunity to prevent type 2 diabetes mellitus: FIGO Best Practice Advice.
  • 2023
  • Ingår i: International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics. - : Wiley. - 1879-3479 .- 0020-7292. ; 160:Suppl 1, s. 56-67
  • Forskningsöversikt (refereegranskat)abstract
    • Gestational diabetes (GDM) impacts approximately 17million pregnancies worldwide. Women with a history of GDM have an 8-10-fold higher risk of developing type 2 diabetes and a 2-fold higher risk of developing cardiovascular disease (CVD) compared with women without prior GDM. Although it is possible to prevent and/or delay progression of GDM to type 2 diabetes, this is not widely undertaken. Considering the increasing global rates of type 2 diabetes and CVD in women, it is essential to utilize pregnancy as an opportunity to identify women at risk and initiate preventive intervention. This article reviews existing clinical guidelines for postpartum identification and management of women with previous GDM and identifies key recommendations for the prevention and/or delayed progression to type 2 diabetes for global clinical practice.
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15.
  • Adame, M. F., et al. (författare)
  • Deconstructing the mangrove carbon cycle: Gains, transformation, and losses
  • 2024
  • Ingår i: ECOSPHERE. - 2150-8925. ; 15:3
  • Forskningsöversikt (refereegranskat)abstract
    • Mangroves are one of the most carbon-dense forests on the Earth and have been highlighted as key ecosystems for climate change mitigation and adaptation. Hundreds of studies have investigated how mangroves fix, transform, store, and export carbon. Here, we review and synthesize the previously known and emerging carbon pathways in mangroves, including gains (woody biomass accumulation, deadwood accumulation, soil carbon sequestration, root and litterfall production), transformations (food web transfer through herbivory, decomposition), and losses (respiration as CO2 and CH4, litterfall export, particulate and dissolved carbon export). We then review the technologies available to measure carbon fluxes in mangroves, their potential, and their limitations. We also synthesize and compare mangrove net ecosystem productivity (NEP) with terrestrial forests. Finally, we update global estimates of carbon fluxes with the most current values of fluxes and global mangrove area. We found that the contributions of recently investigated fluxes, such as soil respiration as CH4, are minor (<1 Tg C year(-1)), while the contributions of deadwood accumulation, herbivory, and lateral export are significant (>35 Tg C year(-1)). Dissolved inorganic carbon exports are an order of magnitude higher than the other processes investigated and were highly variable, highlighting the need for further studies. Gross primary productivity (GPP) and ecosystem respiration (ER) per area of mangroves were within the same order of magnitude as terrestrial forests. However, ER/GPP was lower in mangroves, explaining their higher carbon sequestration. We estimate the global mean mangrove NEP of 109.1 Tg C year(-1) (7.4 Mg C ha(-1) year(-1)) or through a budget balance, accounting for lateral losses, a global mean of 66.6 Tg C year(-1) (4.5 Mg C ha(-1) year(-1)). Overall, mangroves are highly productive, and despite losses due to respiration and tidal exchange, they are significant carbon sinks.
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16.
  • Adenfelt, Maria, et al. (författare)
  • The development and sharing of knowledge by Centres of Excellence and transnational teams : A conceptual framework
  • 2008
  • Ingår i: Management International Review. - : Springer Science and Business Media LLC. - 0938-8249 .- 1861-8901. ; 48:3, s. 319-338
  • Forskningsöversikt (refereegranskat)abstract
    • This paper develops a conceptual framework addressing the development and sharing of knowledge by Centres of Excellence and transnational teams, which are important organisational mechanisms used by headquarters to manage knowledge processes within multinational corporations. The inherent differences of Centres of Excellence and transnational teams are conceptualised in terms of pre-existing knowledge, practices, interaction and communication. The inherent differences in the organisational mechanisms influence the amount of subsidiary participation and what factors that facilitate and hamper knowledge development and sharing respectively.
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17.
  • Adiels, Martin, 1976, et al. (författare)
  • Fatty liver, insulin resistance, and dyslipidemia.
  • 2008
  • Ingår i: Current diabetes reports. - : Springer Science and Business Media LLC. - 1539-0829 .- 1534-4827. ; 8:1, s. 60-4
  • Forskningsöversikt (refereegranskat)abstract
    • After recently being recognized as a feature of the metabolic syndrome, fatty liver has evolved as a key player in the pathogenesis of dyslipidemia. Development of nonalcoholic fatty liver disease comes from an imbalance between the influx and production of fatty acids and the use of fatty acids for oxidation or secretion as very low density lipoprotein (VLDL) triglycerides. Previously, we have shown a strong relationship between increased liver fat and overproduction of large VLDL particles. We observed recently that in patients with high liver fat, insulin was unable to regulate VLDL production. The result is increased concentrations of VLDL particles in the circulation. Consequently, changes are seen in the metabolism of other lipoproteins that interact with VLDL particles, the net result being decreased high-density lipoprotein cholesterol and increased formation of small, dense low-density lipoprotein. In this article, we review recent findings on the development of fatty liver and its role in the diabetic dyslipidemia pathogenesis.
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18.
  • Adiels, Martin, 1976, et al. (författare)
  • Kinetic Studies to Elucidate Impaired Metabolism of Triglyceride-rich Lipoproteins in Humans.
  • 2015
  • Ingår i: Frontiers in Physiology. - : Frontiers Media SA. - 1664-042X. ; 6:NOV, s. 342-
  • Forskningsöversikt (refereegranskat)abstract
    • To develop novel strategies for prevention and treatment of dyslipidemia, it is essential to understand the pathophysiology of dyslipoproteinemia in humans. Lipoprotein metabolism is a complex system in which abnormal concentrations of various lipoprotein particles can result from alterations in their rates of production, conversion, and/or catabolism. Traditional methods that measure plasma lipoprotein concentrations only provide static estimates of lipoprotein metabolism and hence limited mechanistic information. By contrast, the use of tracers labeled with stable isotopes and mathematical modeling, provides us with a powerful tool for probing lipid and lipoprotein kinetics in vivo and furthering our understanding of the pathogenesis of dyslipoproteinemia.
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19.
  • Adiels, Martin, 1976, et al. (författare)
  • Overproduction of very low-density lipoproteins is the hallmark of the dyslipidemia in the metabolic syndrome.
  • 2008
  • Ingår i: Arteriosclerosis, thrombosis, and vascular biology. - 1524-4636 .- 1079-5642. ; 28:7, s. 1225-36
  • Forskningsöversikt (refereegranskat)abstract
    • Insulin resistance is a key feature of the metabolic syndrome and often progresses to type 2 diabetes. Both insulin resistance and type 2 diabetes are characterized by dyslipidemia, which is an important and common risk factor for cardiovascular disease. Diabetic dyslipidemia is a cluster of potentially atherogenic lipid and lipoprotein abnormalities that are metabolically interrelated. Recent evidence suggests that a fundamental defect is an overproduction of large very low-density lipoprotein (VLDL) particles, which initiates a sequence of lipoprotein changes, resulting in higher levels of remnant particles, smaller LDL, and lower levels of high-density liporotein (HDL) cholesterol. These atherogenic lipid abnormalities precede the diagnosis of type 2 diabetes by several years, and it is thus important to elucidate the mechanisms involved in the overproduction of large VLDL particles. Here, we review the pathophysiology of VLDL biosynthesis and metabolism in the metabolic syndrome. We also review recent research investigating the relation between hepatic accumulation of lipids and insulin resistance, and sources of fatty acids for liver fat and VLDL biosynthesis. Finally, we briefly discuss current treatments for lipid management of dyslipidemia and potential future therapeutic targets.
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20.
  • Adlerberth, Ingegerd, 1959, et al. (författare)
  • Establishment of the gut microbiota in Western infants.
  • 2009
  • Ingår i: Acta paediatrica (Oslo, Norway : 1992). - : Wiley. - 1651-2227 .- 0803-5253. ; 98:2, s. 229-38
  • Forskningsöversikt (refereegranskat)abstract
    • In adult individuals, the intestinal microbiota comprises several hundred, mostly anaerobic, bacterial species. This complex ecosystem is formed through the successive establishment of different bacteria in infancy and early childhood. Facultative and aerotolerant bacteria establish first, followed by more and more strict anaerobes. The bacteria derive from different sources and the colonization pattern is influenced by delivery mode and environmental factors. Commensal microbes provide the major drive for maturation of the immune system. Increased hygiene appears to have changed the gut flora of Western infants, which may affect the risk of developing immune mediated diseases. CONCLUSION: It is clear that the process of infant colonization needs to be studied further, since composition of the microbiota may impact on child health.
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