Identifying prognostic structural features in tissue sections of colon cancer patients using point pattern analysis

Diagnosis and prognosis of cancer is informed by the architecture inherent in cancer patient tissue sections. This architecture is typically identified by pathologists, yet advances in computational image analysis facilitate quantitative assessment of this structure. In this article we develop a spatial point process approach in order to describe patterns in cell distribution within tissue samples taken from colorectal cancer (CRC) patients. In particular, our approach is centered on the Palm intensity function. This leads to taking an approximate-likelihood technique in fitting point processes models. We consider two Neyman-Scott point processes and a void process, fitting these point process models to the CRC patient data. We find that the parameter estimates of these models may be used to quantify the spatial arrangement of cells. Importantly, we observe characteristic differences in the spatial arrangement of cells between patients who died from CRC and those alive at follow-up

Integrating Economics, Management, and Human Relationship Issues into Training for Successful Farm Family Businesses

Farm family businesses are not immune to troublesome family dynamics as they make decisions around production, management, and marketing issues. A project funded by the USDA Risk Management Agency in Kansas has pulled together an interdisciplinary team to holistically address farm family business challenges in both conventional and specialty operations. Farmer-to-farmer mentoring, farm family individualized coaching sessions, farm family and agricultural advisor training, and a Web presence are the project delivery options. The project team shares the lessons they have learned after 4 years of program implementation

Three-Year Longitudinal Service-Learning Research Study: Preliminary Findings

Using an experimental design, this study examines the contributions of service-learning to decreased at-risk behaviors, student cognitive, social, and personal development, and academic achievement over a three-year period. During the pilot phase and Years One and Two, teachers and students from eleven different Ohio schools have been surveyed. Preliminary findings are presented

Evaluating survey methods for bat roost detection in ecological impact assessment

International audienceThe disturbance, damage and destruction of roosts are key drivers of bat population declines worldwide. In countries where bats are protected by law, bat roost surveys are often required to inform ecological impact assessments. Yet, evidence-based information on survey methodology to detect bat roosts is crucially lacking, and failing to detect a roost can lead to serious errors during decision-making processes. Here, we assess the efficacy of bat roost surveys in buildings as implemented in the UK. These consist of a daytime inspection of buildings, followed by a series of acoustic surveys at dusk/dawn if during the daytime inspection evidence of bats is found, or if the absence of bats cannot be verified. We reviewed 155 ecological consultants’ reports to (1) compare survey outcome between daytime inspection and acoustic surveys and (2) determine the minimum sampling effort required during acoustic surveys to be confident that no bats are roosting within a building. We focused on two genera of bats most frequently found in buildings in Europe – Pipistrellus (crevice roosting species with high-intensity echolocation calls that can be easily detected by ultrasound detectors) and Plecotus (species that roost in open spaces and which emit faint echolocation calls that are difficult to detect). Daytime inspections were efficient in detecting open-roosting species such as Plecotus species but were likely to miss the presence of crevice-dwelling ones (here Pipistrellus species) which may lead to erroneous conclusions if no acoustic surveys are subsequently prescribed to confirm their absence. A minimum of three and four acoustic surveys are required to be 95% confident that a building does not host a roost of Pipistrellus species and Plecotus species, respectively, thus exceeding current recommendations. Overall, we demonstrated that reports submitted as part of an ecological impact assessment provide suitable data to test and improve survey methods

Project ATTAIN: Advancing Trauma-Informed Care for Youth with Intellectual and Developmental Disabilities and/or Gender Diverse Youth

Children with Intellectual and Developmental Disabilities (IDD) and/or gender diversity are at higher risk of experiencing trauma. Provider knowledge is lacking; trauma, disability, and LGBTQ+ resources are often siloed; and few providers screen for trauma in this population. This paper describes the design, delivery, and initial evaluation of Project ATTAIN (Access to Trauma-informed Treatment and Assessment for Neurodivergent and/or Gender-expansive Youth). ATTAIN is an ongoing 5-year state-wide initiative aiming to assess readiness to engage in new roles and practices over time; provide state-wide training and consultation in trauma, disability, and LGBTQ+-informed practices; install screening and assessment of trauma exposure and PTSD and quality of life into IDD and gender service settings; and include people with lived experience. A readiness assessment identified pre-training gaps between role responsibilities and practice engagement across five professional sectors serving our target population (n=39) in LGBTQ+-, disability-, and trauma-informed practices. We learned that specific sectors would benefit from introductory training to increase buy-in and promote role expansion; others would benefit from advanced instruction and implementation support. So far, we have trained 966 unique providers in trauma-informed care and have seen changes in the attitudes or perspectives of participants. Participants were highly satisfied with our provided training and saw increased knowledge across training. We screened 49 people in an IDD service setting for PTSD and quality of life. Two people with lived experience are active members of our research team, participating in project planning, training delivery, and manuscript authorship. Individuals who work with IDD and/or gender-diverse youth would benefit from increased training to expand their knowledge on LGBTQ+-, disability-, and trauma-informed practices. In year three, we intend to continue outreach and evidence-informed training focused on the intersection of trauma, IDD, and gender diversity. Ongoing evaluation of our outreach, training, and screening efforts will continue to inform program activities

Nutrient enrichment induces a shift in dissolved organic carbon (DOC) metabolism in oligotrophic freshwater sediments

Dissolved organic carbon (DOC) turnover in aquatic environments is modulated by the presence of other key macronutrients, including nitrogen (N) and phosphorus (P). The ratio of these nutrients directly affects the rates of microbial growth and nutrient processing in the natural environment. The aim of this study was to investigate how labile DOC metabolism responds to changes in nutrient stoichiometry using 14C tracers in conjunction with untargeted analysis of the primary metabolome in upland peat river sediments. N addition led to an increase in 14C-glucose uptake, indicating that the sediments were likely to be primarily N limited. The mineralisation of glucose to 14CO2 reduced following N addition, indicating that nutrient addition induced shifts in internal carbon (C) partitioning and microbial C use efficiency (CUE). This is directly supported by the metabolomic profile data which identified significant differences in 22 known metabolites (34% of the total) and 30 unknown metabolites (16% of the total) upon the addition of either N or P. 14C-glucose addition increased the production of organic acids known to be involved in mineral P dissolution (e.g. gluconic acid, malic acid). Conversely, when N was not added, the addition of glucose led to the production of the sugar alcohols, mannitol and sorbitol, which are well known microbial C storage compounds. P addition resulted in increased levels of several amino acids (e.g. alanine, glycine) which may reflect greater rates of microbial growth or the P requirement for coenzymes required for amino acid synthesis. We conclude that inorganic nutrient enrichment in addition to labile C inputs has the potential to substantially alter in-stream biogeochemical cycling in oligotrophic freshwaters

T. brucei cathepsin-L increases arrhythmogenic sarcoplasmic reticulum-mediated calcium release in rat cardiomyocytes

Aims: African trypanosomiasis, caused by Trypanosoma brucei species, leads to both neurological and cardiac dysfunction and can be fatal if untreated. While the neurological-related pathogenesis is well studied, the cardiac pathogenesis remains unknown. The current study exposed isolated ventricular cardiomyocytes and adult rat hearts to T. brucei to test whether trypanosomes can alter cardiac function independent of a systemic inflammatory/immune response. Methods and results: Using confocal imaging, T. brucei and T. brucei culture media (supernatant) caused an increased frequency of arrhythmogenic spontaneous diastolic sarcoplasmic reticulum (SR)-mediated Ca2+ release (Ca2+ waves) in isolated adult rat ventricular cardiomyocytes. Studies utilising inhibitors, recombinant protein and RNAi all demonstrated that this altered SR function was due to T. brucei cathepsin-L (TbCatL). Separate experiments revealed that TbCatL induced a 10–15% increase of SERCA activity but reduced SR Ca2+ content, suggesting a concomitant increased SR-mediated Ca2+ leak. This conclusion was supported by data demonstrating that TbCatL increased Ca2+ wave frequency. These effects were abolished by autocamtide-2-related inhibitory peptide, highlighting a role for CaMKII in the TbCatL action on SR function. Isolated Langendorff perfused whole heart experiments confirmed that supernatant caused an increased number of arrhythmic events. Conclusion: These data demonstrate for the first time that African trypanosomes alter cardiac function independent of a systemic immune response, via a mechanism involving extracellular cathepsin-L-mediated changes in SR function