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"Pierce, Alexandra"
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Using oral history sources to explore anti-Vietnam war experiences
Several of the excerpts highlight how contemptuous some women were of ideas like the Domino Theory and of Australia blindly following America's lead in foreign policy (as they saw it). Encouraging students to critically evaluate them as sources-comparing one with another, or with secondary sources- can help them to perceive nuance in all sources, as well as to understand the diversity of perspectives in the era. * historical significance. [...]one of the wonderful things about using oral history sources is that it can make historical events seem more 'real' and perhaps more personal. [...]I hopped in, and on the front seat was a packet with fresh, hot chips on it.
Journal Article
'This was really life and death': Melbourne women against the Vietnam war and conscription
A sense of gross injustice, a conviction that something needed to be done and a realisation that something could be done by people like them are some of the motivations common to the women who were involved in Australia's anti-Vietnam War and anti-conscription movements in the 1960s and 1970s.
Journal Article
BBK32 attenuates antibody-dependent complement-mediated killing of infectious Borreliella burgdorferi isolates
Borreliella burgdorferi , the causative agent of Lyme disease, has evolved unique complement evasion proteins that promote its ability to establish and maintain infection in mammalian hosts. Among these is B. burgdorferi BBK32, a multifunctional surface lipoprotein that binds extracellular matrix (ECM) components, including fibronectin (Fn). In addition to its ECM-binding functions, BBK32 binds to C1r, the initiator protease of the classical pathway of complement, and protects B. burgdorferi from complement-mediated killing following exposure to normal human serum. The disparate functions of BBK32 in adhesion and complement evasion have previously been studied in isolation. Herein we demonstrate that full-length BBK32 binds both Fn and C1 concurrently, indicating that binding of these macromolecules do not sterically hinder their simultaneous interaction. Given the link of antibody dependence to the classical pathway, we tested how the presence of BBK32 would protect infectious B. burgdorferi from borrelial-specific antibodies in a complement-dependent manner. BBK32 provided protection against complement activation in the presence of borrelial-specific antibodies in vitro . We also demonstrated, using both flow cytometry and fluorescence microscopy, that BBK32 results in the reduction of C4 deposition on the surface of borrelial cells. This work demonstrates that BBK32 can simultaneously bind to both C1r and Fn and contributes to the broader understanding of the ability of B. burgdorferi to evade antibody-dependent complement-mediated killing. These observations are significant as they suggest that BBK32 plays a dual role in adhesion and dissemination in infectious B. burgdorferi , as well as immune evasion activities, which ostensibly promotes its pathogenic potential.
Journal Article
Scale-out of a Total Worker Health® approach for designing interventions to reduce teacher stress: pilot implementation evaluation
Background
Teachers have high rates of daily stress and the majority of available interventions are focused at the teacher-level. Yet, best practices in
Total Worker Health
® approaches indicate organization-level interventions identified using a participatory approach are most effective. We conducted an exploratory scale-out pilot study to examine the adoption of the
Healthy Workplace Participatory Program
(HWPP), an evidence-based,
Total Worker Health
approach to engage employees (e.g., teachers) and supervisory personnel (e.g., administrators) in the design and implementation of workplace well-being interventions within two elementary schools.
Methods
We evaluated the program both quantitatively and qualitatively collecting implementation outcome data (i.e., fidelity, acceptability, understanding, feasibility, system alignment) as well as data-driven adaptations using the Framework for Reporting Adaptations and Modifications-Expanded. Data from the first school informed scale-out adaptation of the HWPP intervention, HWPP-Education, within the second school. We compared implementation outcomes between Pilot Schools 1 and 2 to evaluate improvements in the adapted HWPP.
Results
Adaptations to HWPP program content and process were suggested to increase feasibility and contextual fit. Acceptability, understanding, and feasibility ratings showed statistically significant improvements comparing School 1 to School 2 which implemented the improved HWPP-Education. Furthermore, users reported adaptations including shorter meeting design and faster process were feasible within their work context.
Conclusion
This pilot study is the first attempt to scale out the HWPP to educators, and while not intended to confirm efficacy, it showed promising results for scale-out. Results from Pilot Schools 1 and 2 suggest systematic use of quantitative and qualitative implementation data can effectively inform scale-out efforts that increase critical outcomes such as fidelity, acceptability, understanding, feasibility, system alignment, and leader engagement as well as decrease the extent of system resources needed. As such, this scale-out process may be a feasible approach on which to base large-scale implementation efforts of the HWPP among educators.
Journal Article
Borrelia miyamotoi FbpA and FbpB Are Immunomodulatory Outer Surface Lipoproteins With Distinct Structures and Functions
Pathogens that traffic in the blood of their hosts must employ mechanisms to evade the host innate immune system, including the complement cascade. The Lyme disease spirochete, Borreliella burgdorferi , has evolved numerous outer membrane lipoproteins that interact directly with host proteins. Compared to Lyme disease-associated spirochetes, relatively little is known about how an emerging tick-borne spirochetal pathogen, Borrelia miyamotoi , utilizes surface lipoproteins to interact with a human host. B. burgdorferi expresses the multifunctional lipoprotein, BBK32, that inhibits the classical pathway of complement through interaction with the initiating protease C1r, and also interacts with fibronectin using a separate intrinsically disordered domain. B. miyamotoi encodes two separate bbk32 orthologs denoted fbpA and fbpB ; however, the activities of these proteins are unknown. Here, we show that B. miyamotoi FbpA binds human fibronectin in a manner similar to B. burgdorferi BBK32, whereas FbpB does not. FbpA and FbpB both bind human complement C1r and protect a serum-sensitive B. burgdorferi strain from complement-mediated killing, but surprisingly, differ in their ability to recognize activated C1r versus zymogen states of C1r. To better understand the observed differences in C1r recognition and inhibition properties, high-resolution X-ray crystallography structures were solved of the C1r-binding regions of B. miyamotoi FbpA and FbpB at 1.9Å and 2.1Å, respectively. Collectively, these data suggest that FbpA and FbpB have partially overlapping functions but are functionally and structurally distinct. The data presented herein enhances our overall understanding of how bloodborne pathogens interact with fibronectin and modulate the complement system.
Journal Article
American Indian Adolescent Girls: Vulnerability to Sex Trafficking, Intervention Strategies
The Minnesota Indian Women's Resource Center offers harm reduction programming to at-risk adolescent American Indian girls, including outreach, case management, advocacy, healthy sexuality education, and support groups. To evaluate program impact, participants are assessed at intake and every 6 months afterward for current vulnerability to commercial sexual exploitation, violence, and addiction. Evaluation results indicate frequent exposure to sex traffickers and suggest that harm reduction methods can help girls reduce risk of commercial sexual exploitation.
Journal Article
Recrystallization and damage of ice in winter sports
Ice samples, after sliding against a steel runner, show evidence of recrystallization and microcracking under the runner, as well as macroscopic cracking throughout the ice. The experiments that produced these ice samples are designed to be analogous to sliding in the winter sport of skeleton. Changes in the ice fabric are shown using thick and thin sections under both diffuse and polarized light. Ice drag is estimated as 40-50% of total energy dissipation in a skeleton run. The experimental results are compared with visual inspections of skeleton tracks, and to similar behaviour in rocks during sliding on earthquake faults. The results presented may be useful to athletes and designers of winter sports equipment.
This article is part of the themed issue ‘Microdynamics of ice’.
Journal Article
Recrystallization and damage of ice in winter sports
Ice samples, after sliding against a steel runner, show evidence of recrystallization and microcracking under the runner, as well as macroscopic cracking throughout the ice. The experiments that produced these ice samples are designed to be analogous to sliding in the winter sport of skeleton. Changes in the ice fabric are shown using thick and thin sections under both diffuse and polarized light. Ice drag is estimated as 40–50% of total energy dissipation in a skeleton run. The experimental results are compared with visual inspections of skeleton tracks, and to similar behaviour in rocks during sliding on earthquake faults. The results presented may be useful to athletes and designers of winter sports equipment. This article is part of the themed issue 'Microdynamics of ice'.
Journal Article
\Conformational dynamics of C1r inhibitor proteins from Lyme disease and relapsing fever spirochetes\
Borrelial pathogens are vector-borne etiological agents of Lyme disease, relapsing fever, and
disease. These spirochetes each encode several surface-localized lipoproteins that bind to components of the human complement system. BBK32 is an example of a borrelial lipoprotein that protects the Lyme disease spirochete from complement-mediated attack. The complement inhibitory activity of BBK32 arises from an alpha helical C-terminal domain that interacts directly with the initiating protease of the classical pathway, C1r.
spirochetes encode BBK32 orthologs termed FbpA and FbpB, and these proteins also inhibit C1r, albeit via distinct recognition mechanisms. The C1r-inhibitory activities of a third ortholog termed FbpC, which is found exclusively in relapsing fever spirochetes, remains unknown. Here we report the crystal structure of the C-terminal domain of
FbpC to a limiting resolution of 1.5 Å. Surface plasmon resonance studies and assays of complement function demonstrate that FbpC retains potent BBK32-like anti-complement activities. Based on the structure of FbpC, we hypothesized that conformational dynamics of the complement inhibitory domains of borrelial C1r inhibitors may differ. To test this, we utilized the crystal structures of the C-terminal domains of BBK32, FbpA, FbpB, and FbpC to carry out 1 µs molecular dynamics simulations, which revealed borrelial C1r inhibitors adopt energetically favored open and closed states defined by two functionally critical regions. This study advances our understanding of how protein dynamics contribute to the function of bacterial immune evasion proteins and reveals a surprising plasticity in the structures of borrelial C1r inhibitors.
Journal Article