Distinct roles of spinal commissural interneurons in transmission of contralateral sensory information.

Crossed reflexes are mediated by commissural pathways transmitting sensory information to the contralateral side of the body, but the underlying network is not fully understood. Commissural pathways coordinating the activities of spinal locomotor circuits during locomotion have been characterized in mice, but their relationship to crossed reflexes is unknown. We show the involvement of two genetically distinct groups of commissural interneurons (CINs) described in mice, V0 and V3 CINs, in the crossed reflex pathways. Our data suggest that the exclusively excitatory V3 CINs are directly involved in the excitatory crossed reflexes and show that they are essential for the inhibitory crossed reflexes. In contrast, the V0 CINs, a population that includes excitatory and inhibitory CINs, are not directly involved in excitatory or inhibitory crossed reflexes but downregulate the inhibitory crossed reflexes. Our data provide insights into the spinal circuitry underlying crossed reflexes in mice, describing the roles of V0 and V3 CINs in crossed reflexes.

Distinct roles of spinal commissural interneurons in transmission of contralateral sensory information.

Crossed reflexes (CR) are mediated by commissural pathways transmitting sensory information to the contralateral side of the body, but the underlying network is not fully understood. Commissural pathways coordinating the activities of spinal locomotor circuits during locomotion have been characterized in mice, but their relationship to CR is unknown. We show the involvement of two genetically distinct groups of commissural interneurons (CINs) described in mice, V0 and V3 CINs, in the CR pathways. Our data suggest that the exclusively excitatory V3 CINs are directly involved in the excitatory CR, and show that they are essential for the inhibitory CR. In contrast, the V0 CINs, a population that includes excitatory and inhibitory CINs, are not directly involved in excitatory or inhibitory CRs but down-regulate the inhibitory CR. Our data provide insights into the spinal circuitry underlying CR in mice, describing the roles of V0 and V3 CINs in CR.

Motor processivity and speed determine structure and dynamics of microtubule-motor assemblies.

Active matter systems can generate highly ordered structures, avoiding equilibrium through the consumption of energy by individual constituents. How the microscopic parameters that characterize the active agents are translated to the observed mesoscopic properties of the assembly has remained an open question. These active systems are prevalent in living matter; for example, in cells, the cytoskeleton is organized into structures such as the mitotic spindle through the coordinated activity of many motor proteins walking along microtubules. Here, we investigate how the microscopic motor-microtubule interactions affect the coherent structures formed in a reconstituted motor-microtubule system. This question is of deeper evolutionary significance as we suspect motor and microtubule type contribute to the shape and size of resulting structures. We explore key parameters experimentally and theoretically, using a variety of motors with different speeds, processivities, and directionalities. We demonstrate that aster size depends on the motor used to create the aster, and develop a model for the distribution of motors and microtubules in steady-state asters that depends on parameters related to motor speed and processivity. Further, we show that network contraction rates scale linearly with the single-motor speed in quasi-one-dimensional contraction experiments. In all, this theoretical and experimental work helps elucidate how microscopic motor properties are translated to the much larger scale of collective motor-microtubule assemblies.

Evaluating the role of financial navigation in alleviating financial distress among young adults with a history of blood cancer: A hybrid type 2 randomized effectiveness-implementation design.

BACKGROUND: Young adulthood (YA) is a complex phase of life, marked by key developmental goals, including educational and vocational attainment, housing independence, maintenance of social relationships, and financial stability. A cancer diagnosis during, or prior to, this phase of life can compromise the achievement of these milestones. Studies of adults with cancer have demonstrated that >70% report experiencing financial side-effects, which are associated with increased mortality, diminished health-related quality of life, and forgone medical care. The goal of this project is to evaluate financial distress of YA-aged survivors of blood cancers, and the impact of financial navigation on alleviating this distress. METHODS: This three-arm, multi-site, hybrid type 2 randomized effectiveness-implementation design (EID) study will be conducted through remote consent, remote data capture and telephone-based/virtual financial navigation. Participants will be aged 18-39, and more than three years from their blood cancer diagnosis. In this six-month intervention, the study will compare the primary outcome of financial distress in three arms: (1) usual care (2) participant-initiated, ad hoc navigation, and (3) study-directed proactive navigation. The study will be evaluated via the five-component Reach, Effectiveness, Adoption, Implementation, Maintenance (RE-AIM) outcome strategy with a mixed-methods approach through quantitative assessment of participant-reported financial distress using the Personal Financial Wellness Scale™, as the primary outcome measure, and qualitative assessment through interviews. CONCLUSION: The study will address many unanswered questions regarding financial navigation within the YA survivor population and will inform the most successful strategies to mitigate financial distress in this vulnerable population.

Adolescent and Young Adult Survivorship Care: Emerging from the COVID-19 Pandemic Stronger Through Teleoncology.

The Adolescent and Young Adult (AYA) survivorship clinic at Tufts Medical Center transitioned to telehealth appointments when ambulatory clinics closed at the onset of the COVID-19 pandemic in early 2020. This review analyzes 195 survivorship telehealth visits for 90 patients, diagnosed with cancer younger than the age of 40 years. This cohort, seen during the Massachusetts State of Emergency, exemplifies the success and acceptance of telehealth among AYA survivors. The clinic's long-term goal is to advocate for telehealth as a standard in AYA survivorship care; however, telehealth faces increasing barriers as modifications to address the pandemic are amended or lifted.

Anthroponumbers.org: A quantitative database of human impacts on Planet Earth.

The Human Impacts Database (www.anthroponumbers.org) is a curated, searchable resource housing quantitative data relating to the diverse anthropogenic impacts on our planet, with topics ranging from sea-level rise to livestock populations, greenhouse gas emissions, fertilizer use, and beyond. Each entry in the database reports a quantitative value (or a time series of values) along with clear referencing of the primary source, the method of measurement or estimation, an assessment of uncertainty, and links to the underlying data, as well as a permanent identifier called a Human Impacts ID (HuID). While there are other databases that house some of these values, they are typically focused on a single topic area, like energy usage or greenhouse gas emissions. The Human Impacts Database facilitates access to carefully curated data, acting as a quantitative resource pertaining to the myriad ways in which humans have an impact on the Earth, for practicing scientists, the general public, and those involved in education for sustainable development alike. We outline the structure of the database, describe our curation procedures, and use this database to generate a graphical summary of the current state of human impacts on the Earth, illustrating both their numerical values and their intimate interconnections.

Hodgkin lymphoma survivor perspectives on their engagement in treatment decision-making and discussion of late effects.

BACKGROUND: Hodgkin lymphoma has a bimodal age distribution with the first peak occurring within young adulthood and the second, among older adults. Although current therapy provides excellent disease control, survivors are at risk of developing treatment-related late effects (LEs). We sought to understand how survivors in active survivorship care perceived their role in treatment decision-making and when they acquired an understanding of LEs. METHODS: Semi-structured interviews were conducted until saturation was reached. Themes were identified through direct content analysis and consensus coding by a multidisciplinary team of coders, including hematology/oncology providers, patient navigators, and survivor stakeholders. RESULTS: Seventeen interviews were conducted. Role in initial treatment decision-making fluctuated between passive and active engagement with providers identified as being crucial to this process. Half of interviewees (53%) expressed unmet information needs. Survivors reported having learned about LEs at multiple time points, spanning from before treatment commenced through when a LE was diagnosed. The majority (71%) expressed a desire to have learned about LEs before initial treatment ended. The impact of cancer and fertility discussions were also disclosed. DISCUSSION: Participants highlighted the importance of discussions on LEs early in the care continuum. These preliminary data will be incorporated in a planned treatment decision-making tool that incorporates information on potential LEs. IMPLICATIONS FOR CANCER SURVIVORS: Patient-centered communication approaches should be embraced to assist in treatment decision-making, while considering long-term health consequences. Survivors must be educated on their risk of LEs and encouraged to disclose their perspectives and preferences with their providers to optimize outcomes.

Perceptions of Role in Treatment Decision Making and Understanding of Late Effects Among Hodgkin Lymphoma Survivors: Results From a National Survey HL Decision Making and Late Effects.

BACKGROUND: Hodgkin Lymphoma (HL) survivors are at risk of treatment-related late effects (LEs). With these potential risks and increasing numbers of treatment options for newly diagnosed patients, communication and shared decision making are essential to supporting patients throughout the cancer care continuum. We aimed to gather perspectives of HL survivors about their actual role in treatment decision making and their understanding of LEs. MATERIALS AND METHODS: After initial pilot testing at a cancer survivor conference, we disseminated a 23-question survey in a single-wave e-mail through the Leukemia & Lymphoma Society's national listserv. We focused on 4 constructs: (1) patient's understanding of HL at diagnosis; (2) initial discussions with an oncologist; (3) factors in decision making of treatment, and (4) current health status. RESULTS: A total of 135 participants responded to the survey. While 73% of survey respondents perceived some involvement in decision making, one-half of respondents felt the treatment plan was a shared decision with their provider. Among patient-level factors, side effects/LEs were most frequently endorsed as important to treatment decisions. Eighty-four percent of respondents had been educated about risk for potential LEs. Thirty-six percent had been diagnosed with a LE at the time of survey completion with 3% reporting a second cancer diagnosis. CONCLUSION: Survey respondents described their role in treatment decision making for newly diagnosed HL. Nearly half of patients did not endorse participating in shared decision making. A substantial number had experienced LEs. Future work should focus on improving patient-provider communication in decision processes for newly diagnosed HL.

Enhancing patients' understanding of and adherence to oral anticancer medication: Results of a longitudinal pilot intervention.

BACKGROUND: Oral anticancer medications (OAM) make administration more convenient for patients, but shifts the responsibility of care from clinical providers to the patients themselves. Following an institutional pilot study showing inadequate understanding and adherence among vulnerable patients taking OAM, a longitudinal intervention was developed using an oncology specialty pharmacist and medication navigators to enhance OAM understanding and adherence. METHODS: Patients initiating OAM were approached for four formalized teaching and check-in sessions, supplemented with medication information sheets and individualized calendars. At each session, participants were assessed on their OAM understanding and adherence using teach-back and validated measures. A study evaluation elicited feedback from participants on the usefulness of the intervention. RESULTS: Of 80 eligible patients, 58 (72.5%) received formal OAM teaching from the specialty pharmacist. Of those, 54 (93.1%) enrolled in the study with 39 (72%) completing the intervention for final analysis. At study completion, all participants adequately understood OAM taking, but 41.0% had inadequate understanding of OAM handling. Throughout the study, participants reported issues that were addressed by the intervention team (28.2% to 31.6%) as well as those requiring additional assistance from the treatment team (26.3% to 38.5%), Most participants found the intervention to be very beneficial (initial evaluation, 86.5%; final evaluation, 76.9%). CONCLUSIONS: This pilot intervention addressed gaps identified by our institutional assessment through formalized OAM teaching and follow-up. Improved understanding of taking and handling OAM through this subsequent study illustrated the enhanced effect of a multidisciplinary and multicomponent intervention to better educate and support patients on OAM.

The Creation of a Comprehensive Adolescent and Young Adult Cancer Survivorship Program: "Lost in Transition" No More.

Purpose: The Reid R. Sacco AYA Cancer Program set out to improve survivorship care for AYA-aged patients (15-39 years) of pediatric or AYA cancer. This article discusses the steps in establishing the clinic, including the creation of a database on cancer history, exposures, and attendant risks of late effects. Results from the database tell the broader story of AYAs who seek care within a dedicated survivorship clinic. Methods: The database was created with REDCap® (Research Electronic Data Capture), a secure web-based, HIPAA compliant application for research and clinical study data. Data were abstracted and analyzed by trained members of the program team. Results: A total of 144 patients were seen for their initial survivorship visit between January 2013 and September 2019. Regarding physical health, two-thirds of the patients presented with an established late effect, one third with an established medical comorbidity, and 11% (n = 16) with secondary cancer related to their oncologic treatment. In assessing mental health, a significant cohort reported a known affective disorder (32%, n = 46) with one quarter already taking a psychotropic medication. Despite the transient nature of AYAs, 85% of patients remained in care within the long-term follow-up clinical model. Conclusions: Data presented illustrate how multilayered and complex survivorship care needs can be, as patients enter the clinic with complicated pre-existing psychosocial issues, significant late effects, and comorbidities. This study reinforces the value of a clinical database to better understand AYA survivors with the ultimate goal of optimizing and coordinating care.

Controlling organization and forces in active matter through optically defined boundaries.

Living systems are capable of locomotion, reconfiguration and replication. To perform these tasks, cells spatiotemporally coordinate the interactions of force-generating, 'active' molecules that create and manipulate non-equilibrium structures and force fields of up to millimetre length scales1-3. Experimental active-matter systems of biological or synthetic molecules are capable of spontaneously organizing into structures4,5 and generating global flows6-9. However, these experimental systems lack the spatiotemporal control found in cells, limiting their utility for studying non-equilibrium phenomena and bioinspired engineering. Here we uncover non-equilibrium phenomena and principles of boundary-mediated control by optically modulating structures and fluid flow in an engineered system of active biomolecules. Our system consists of purified microtubules and light-activatable motor proteins that crosslink and organize the microtubules into distinct structures upon illumination. We develop basic operations-defined as sets of light patterns-to create, move and merge the microtubule structures. By combining these operations, we create microtubule networks that span several hundred micrometres in length and contract at speeds up to an order of magnitude higher than the speed of an individual motor protein. We manipulate these contractile networks to generate and sculpt persistent fluid flows. The principles of boundary-mediated control that we uncover may be used to study emergent cellular structures and forces and to develop programmable active-matter devices.

Personal Narrative: Raising Awareness of Adolescent and Young Adult Cancer Survivors in Similarly Aged University Students.

Purpose: As part of a programmatic educational initiative, we developed a personal narrative presentation, embedded with evidence-based data, to raise awareness of adolescents and young adults (AYAs) who have been diagnosed with cancer between the ages of 15 and 39 years among similarly aged university students. The narrative encompassed the cancer care continuum from signs of the disease through survivorship and incorporated psychosocial aspects of the experience. Methods: The presenter, diagnosed with lymphoma at the age of 25 years in 2007, interwove AYA data with her narrative in a series of 26 invited lectures given over 2 academic years, 2016-2017 and 2017-2018. Students were asked to provide anonymous open-ended feedback. Six hundred thirteen forms were collected and retrospectively dually coded and analyzed. Results: The majority of students (97%) referenced at least one of the presentation's three objectives: (1) build awareness of the AYA demographic; (2) encourage a personal health care focus; and (3) expand awareness of the far-reaching impact of cancer (i.e., psychological, social, and medical) both during and beyond the treatment phase. Format- and/or content-related suggestions and potential benefits of hearing the narrative also were reported. Conclusion: The use of personal narrative to raise awareness of the AYA cancer experience in an academic setting is both feasible and effective. Students demonstrated a new or enhanced understanding of AYA cancer and its biopsychosocial implications. We provide evidence to inform the design of awareness interventions directed at similarly aged university students.

Detection of Alzheimer Disease (AD)-Specific Tau Pathology in AD and NonAD Tauopathies by Immunohistochemistry With Novel Conformation-Selective Tau Antibodies.

Aggregation of tau into fibrillar structures within the CNS is a pathological hallmark of a clinically heterogeneous set of neurodegenerative diseases termed tauopathies. Unique misfolded conformations of tau, referred to as strains, are hypothesized to underlie the distinct neuroanatomical and cellular distribution of pathological tau aggregates. Here, we report the identification of novel tau monoclonal antibodies (mAbs) that selectively bind to an Alzheimer disease (AD)-specific conformation of pathological tau. Immunohistochemical analysis of tissue from various AD and nonAD tauopathies demonstrate selective binding of mAbs GT-7 and GT-38 to AD tau pathologies and absence of immunoreactivity for tau aggregates that are diagnostic of corticobasal degenerations (CBD), progressive supranuclear palsy (PSP), and Pick's disease (PiD). In cases with co-occurring AD tauopathy, GT-7 and GT-38 distinguish comorbid AD tau from pathological tau in frontotemporal lobar degeneration characterized by tau inclusions (FTLD-Tau), as confirmed by the presence of both 3 versus 4 microtubule-binding repeat isoforms (3R and 4R tau isoforms, respectively), in AD neurofibrillary tangles but not in the tau aggregates of CBD, PSP, or PiD. These findings support the concept of an AD-specific tau strain. The mAbs described here enable the selective detection of AD tau pathology in nonAD tauopathies.

GFP-Mutant Human Tau Transgenic Mice Develop Tauopathy Following CNS Injections of Alzheimer's Brain-Derived Pathological Tau or Synthetic Mutant Human Tau Fibrils.

Neurodegenerative proteinopathies characterized by intracellular aggregates of tau proteins, termed tauopathies, include Alzheimer's disease (AD), frontotemporal lobar degeneration (FTLD) with tau pathology (FTLD-tau), and related disorders. Pathological tau proteins derived from human AD brains (AD-tau) act as proteopathic seeds that initiate the templated aggregation of soluble tau upon intracerebral injection into tau transgenic (Tg) and wild-type mice, thereby modeling human tau pathology. In this study, we found that aged Tg mice of both sexes expressing human tau proteins harboring a pathogenic P301L MAPT mutation labeled with green fluorescent protein (T40PL-GFP Tg mouse line) exhibited hyperphosphorylated tau mislocalized to the somatodentritic domain of neurons, but these mice did not develop de novo insoluble tau aggregates, which are characteristic of human AD and related tauopathies. However, intracerebral injections of either T40PL preformed fibrils (PFFs) or AD-tau seeds into T40PL-GFP mice induced abundant intraneuronal pathological inclusions of hyperphosphorylated T40PL-GFP. These injections of pathological tau resulted in the propagation of tau pathology from the injection site to neuroanatomically connected brain regions, and these tau inclusions consisted of both T40PL-GFP and WT endogenous mouse tau. Primary neurons cultured from the brains of neonatal T40PL-GFP mice provided an informative in vitro model for examining the uptake and localization of tau PFFs. These findings demonstrate the seeded aggregation of T40PL-GFP in vivo by synthetic PFFs and human AD-tau and the utility of this system to study the neuropathological spread of tau aggregates.SIGNIFICANCE STATEMENT The stereotypical spread of pathological tau protein aggregates have recently been attributed to the transmission of proteopathic seeds. Despite the extensive use of transgenic mouse models to investigate the propagation of tau pathology in vivo, details of the aggregation process such as the early seeding events leading to new tau pathology have remained elusive. This study validates the use of GFP-labeled tau expressed by neurons in vivo and in vitro as models for investigating mechanisms underlying the seeded transmission of tau pathology as well as tau-focused drug discovery to identify disease-modifying therapies for AD and related tauopathies.

Differences in smoking and quitting experiences by levels of smoking among African Americans.

BACKGROUND: Despite smoking fewer cigarettes per day than their White counterparts, African Americans have higher tobacco-related morbidity and mortality. Since most tobacco control efforts have focused on heavy smokers, little is known about smoking and quitting experiences of African-American occasional and light smokers. METHODS: We conducted a survey of 484 African-American smokers, which included: 104 occasional (smoked in < or = 25 of last 30 days), 176 light [smoked 1-10 cigarettes per day (cpd)], 69 moderate (11-19 cpd), and 135 heavy (> or = 20 cpd) attending an inner-city clinic. The survey assessed their sociodemographic characteristics, smoking characteristics, and cessation experiences. RESULTS: Compared with moderate and heavy smokers, occasional and light smokers were, on average, younger, more likely to be female, and more likely to initiate regular smoking at an older age. Forty percent of occasional smokers used other tobacco products compared to 23.3%, 24.6%, and 27.4% for light, moderate, and heavy smokers, respectively. Motivation and confidence to quit were higher among occasional and light smokers. Interest in participating in a formal cessation program was equally high in all 4 groups (mean ranged from 7.6-8.0 on a scale of 1-10). The use of pharmacotherapy for smoking cessation was similar, and generally low, among all 4 groups. CONCLUSIONS: High levels of motivation for smoking cessation exist among African-American occasional and light smokers. The interest of these lighter smokers in smoking cessation represents a window of opportunity to design programs for a group that has been excluded from most cessation interventions.