Alzheimer’s Disease: Beyond the Neuron

This chapter describes the various systems beyond the central nervous system that are associated with Alzheimer’s disease (AD). There is strong evidence to believe that while AD has symptoms of memory and cognitive impairment—undoubtedly domains of the central nervous system—the primary insult that causes this condition may arise systemically. We describe associations with the immune system, gut microbiome, and endocrine abnormalities that may be at play. Our goal is to incorporate a multi-system approach to understand the pathogenesis of AD. Our body does not function as soloed organ systems, and we hypothesize that the mechanisms described herein are similarly contributing to the progression of cognitive impairment in AD

Magnetic Particle Imaging tracks the long-term fate of in vivo neural cell implants with high image contrast.

We demonstrate that Magnetic Particle Imaging (MPI) enables monitoring of cellular grafts with high contrast, sensitivity, and quantitativeness. MPI directly detects the intense magnetization of iron-oxide tracers using low-frequency magnetic fields. MPI is safe, noninvasive and offers superb sensitivity, with great promise for clinical translation and quantitative single-cell tracking. Here we report the first MPI cell tracking study, showing 200-cell detection in vitro and in vivo monitoring of human neural graft clearance over 87 days in rat brain

Location of studies and evidence of effects of herbivory on Arctic vegetation: a systematic map

Herbivores modify the structure and function of tundra ecosystems. Understanding their impacts is necessary to assess the responses of these ecosystems to ongoing environmental changes. However, the effects of herbivores on plants and ecosystem structure and function vary across the Arctic. Strong spatial variation in herbivore effects implies that the results of individual studies on herbivory depend on local conditions, i.e., their ecological context. An important first step in assessing whether generalizable conclusions can be produced is to identify the existing studies and assess how well they cover the underlying environmental conditions across the Arctic. This systematic map aims to identify the ecological contexts in which herbivore impacts on vegetation have been studied in the Arctic. Specifically, the primary question of the systematic map was: “What evidence exists on the effects of herbivores on Arctic vegetation?”

Moving Towards Equity With Digital Health Innovations for Stroke Care

Digital health has long been championed as a means to expanding access to health care. Now that the COVID-19 pandemic accelerated many health systems' integration of digital tools for care, digital health may provide a path towards more accessible stroke prevention and treatment, particularly for historically disadvantaged patient populations. Stroke management is composed of multiple time points where digital health innovations have the potential to augment health access and treatment: from primary prevention, to the time-sensitive detection of ischemic stroke, administration of thrombolytic agents and consideration for endovascular interventions, to appropriate post-acute care, rehabilitation, and lifelong secondary stroke prevention-stroke care relies on a multidisciplinary and standardized approach. However, as we discuss pointedly in this Focused Update, underrepresented individuals face multilevel digital health disparities that potentially diminish the benefits of these digital advances. As such, these multilevel needs must be discussed and accounted for as health systems seek to integrate innovative and equitable digital health solutions towards stroke care

Secondary cutaneous plasmacytoma: A bad prognostic marker

Plasmacytomas are malignancies of plasma cells that may affect skin or other organs. Plasmacytoma of skin is a rare presentation, which may occur either secondary to multiple myeloma or very rarely may originate in the skin. Histopathology with immunohistochemistry is diagnostic. We present a rare case of secondary cutaneous plasmacytoma

Ethical Challenges in Caring for Unrepresented Adults: A Qualitative Study of Key Stakeholders.

The decision-making process on behalf of unrepresented adults (ie, those who lack capacity to make medical decisions and have no identifiable surrogate) is at risk for not incorporating their interests, raising ethical concerns. We performed semistructured interviews with key stakeholders across multiple sectors in an urban county who participate in the care of or decision-making process for unrepresented adults. This included a safety net healthcare system, social services, and legal services. Participants were healthcare, social service, and legal professionals who worked with unrepresented adults (n = 25). Our interview questions explored the current process for proxy decision making in cases of unrepresented adults and potential alternatives. We recorded, transcribed, and analyzed interviews using the constant comparative method to identify major themes related to ethical challenges if they were raised. Participants grappled with multiple ethical challenges around the care of unrepresented adults. Themes described by participants were: (1) prioritizing autonomy; (2) varying safety thresholds; (3) distributing resources fairly; and (4) taking a moral toll on stakeholders. In conclusion, all stakeholders identified ethical challenges in caring for unrepresented adults. An applied ethical framework that takes these dilemmas into account could improve ethical practice for unrepresented adults and lessen the emotional toll on stakeholders. J Am Geriatr Soc 67:1724-1729, 2019