Crop pests and predators exhibit inconsistent responses to surrounding landscape composition

The idea that noncrop habitat enhances pest control and represents a win–win opportunity to conserve biodiversity and bolster yields has emerged as an agroecological paradigm. However, while noncrop habitat in landscapes surrounding farms sometimes benefits pest predators, natural enemy responses remain heterogeneous across studies and effects on pests are inconclusive. The observed heterogeneity in species responses to noncrop habitat may be biological in origin or could result from variation in how habitat and biocontrol are measured. Here, we use a pest-control database encompassing 132 studies and 6,759 sites worldwide to model natural enemy and pest abundances, predation rates, and crop damage as a function of landscape composition. Our results showed that although landscape composition explained significant variation within studies, pest and enemy abundances, predation rates, crop damage, and yields each exhibited different responses across studies, sometimes increasing and sometimes decreasing in landscapes with more noncrop habitat but overall showing no consistent trend. Thus, models that used landscape-composition variables to predict pest-control dynamics demonstrated little potential to explain variation across studies, though prediction did improve when comparing studies with similar crop and landscape features. Overall, our work shows that surrounding noncrop habitat does not consistently improve pest management, meaning habitat conservation may bolster production in some systems and depress yields in others. Future efforts to develop tools that inform farmers when habitat conservation truly represents a win–win would benefit from increased understanding of how landscape effects are modulated by local farm management and the biology of pests and their enemies

Synovial Pathophysiology and Pain in Knee Osteoarthritis

Purpose: The overall purpose of this dissertation was to investigate the role of synovial pathophysiology in knee osteoarthritis (OA) pain. Methods: This dissertation includes four studies. Participants were recruited as part of the on-going Western Ontario Registry for Early Osteoarthritis (WOREO) Knee Study, which is a prospective cohort study designed to investigate clinical, biomechanical, and pathophysiological features of early- and late-stages of knee OA, including those undergoing total knee arthroplasty (TKA). Patient-reported outcome measures of pain were collected. Several methodologies were used to characterize synovial pathophysiology including musculoskeletal ultrasound (US), histopathology, high throughput ‘omics’ technologies (i.e., spatial profiling, single-cell RNA sequencing), and cell-based functional assays. Results: Moderate/severe US-synovitis was associated with worse intermittent and constant pain in patients with radiographic early-stage OA. However, no associations were identified in patients with late-stage knee OA. Histopathological features of synovial tissue damage, microvascular pathology, and inflammation are present in the synovium from late-stage knee OA patients. Higher US measures of synovitis were associated with higher histopathological scores for inflammation, while lower US measures were associated with higher scores for synovial tissue damage. Worse pain was characterized by increased synovial tissue damage (particularly microvascular pathology), immune exhaustion, and neurovascular remodeling. Histopathological measures of synovial microvascular pathology were associated with decreased response to TKA. Conclusions: Novel insights were uncovered regarding the role of synovial microvascular pathology in pain cross-sectionally, and longitudinally after TKA. Importantly, we identified a link between synovial immune cell exhaustion, aberrant neurovascular remodeling, and OA pain. These findings suggest that restoring the homeostatic function of the synovium may be key to improving outcomes for patients living with knee OA

Early blockade of joint inflammation with a fatty acid amide hydrolase inhibitor decreases end-stage osteoarthritis pain and peripheral neuropathy in mice

Abstract Background The endocannabinoid system has been shown to reduce inflammatory flares and pain in rodent models of arthritis. A limitation of endocannabinoids is that they are rapidly denatured by hydrolysing enzymes such as fatty acid amide hydrolase (FAAH) which renders them physiologically inert. Osteoarthritis (OA) is primarily a degenerative joint disease; however, it can incorporate mild inflammation and peripheral neuropathy. The aim of this study was to determine whether early blockade of FAAH bioactivity could reduce OA-associated inflammation and joint neuropathy. The ability of this treatment to prevent end-stage OA pain development was also tested. Methods Physiological saline or sodium monoiodoacetate (MIA; 0.3 mg) was injected into the right knee of male C57Bl/6 mice (20–42 g) and joint inflammation (oedema, blood flow and leukocyte trafficking) was measured over 14 days. Joint inflammation was also measured in a separate cohort of animals treated on day 1 with either saline or the FAAH inhibitor URB597 (0.03–0.3 mg/kg topical onto the knee joint). In other experiments, von Frey hair tactile sensitivity was determined on days 1 and 14 in MIA-injected mice treated prophylactically with URB597 (0.3 mg/kg s.c. over the knee joint on days 0–3). Saphenous nerve myelination was also assessed in these animals on day 14 by G-ratio analysis. Results Intra-articular injection of MIA caused an increase in joint oedema (P < 0.0001), blood flow (P < 0.05), leukocyte rolling (P < 0.05) and adherence (P < 0.001) on day 1 after treatment which subsequently resolved over later time points. This acute inflammatory response was ameliorated by local URB597 treatment. Prophylactic local administration of URB597 prevented MIA-induced saphenous nerve demyelination, and chronic joint pain was also attenuated. Conclusions These data indicate that local inhibition of FAAH in MIA-injected knees can reduce acute inflammatory changes associated with the model. Prophylactic treatment of OA mice with the endocannabinoid hydrolysis inhibitor URB597 was also shown to be neuroprotective and prevented the development of joint pain at later time points

Cross-sectional reliability and concurrent validity of a quantitative 2-dimensional ultrasound image analysis of effusion and synovial hypertrophy in knee osteoarthritisKey messages

Objective: Effusion-synovitis is related to pain and progression in knee osteoarthritis (OA), but current gold standard ultrasound (US) measures are limited to semi-quantitative grading of joint distension or 1-dimensional thickness measures. A novel quantitative 2-dimensional image analysis methodology is applied to US images of effusion-synovitis; reliability and concurrent validity was assessed in patients with knee OA. Methods: Cross sectional analysis of US images collected from 51 patients with symptomatic knee OA were processed in ImageJ and segmented in 3DSlicer to produce a binary mask of the supra-patellar synovitis region of interest (ROI). Area measures (mm2) of total synovitis, effusion and hypertrophy components were exported. Intra-rater reliability and test-retest reliability (1–14 days washout) were estimated with intra-class correlation coefficients (ICCs). Concurrent validity was measured by Spearman correlations between quantitative measures and gold standard OMERACT and caliper measurements of synovitis. Results: Intra-rater reliability for hypertrophy area was estimated at 0.98, 0.99 for effusion area, and 0.99 for total synovitis area. The test-retest reliability for total synovitis area was 0.63 (SEM 87.8 ​mm2), 0.59 for hypertrophy area (SEM 21.0 ​mm2), and 0.64 for effusion area (SEM 73.8 ​mm2). Correlation between total synovitis area and OMERACT grade was 0.84, 0.81 between total synovitis area and effusion-synovitis calipers, and 0.81 between total effusion area and effusion calipers. Conclusion: This new research tool for image analysis demonstrated excellent intra-rater reliability, good concurrent validity, and moderate test-retest reliability. Quantitative 2D US measures of effusion-synovitis and its individual components may enhance the study and management of knee OA

Students\u27 attitudes, beliefs and perceptions surrounding 2SLGBTQIA + health education and inclusiveness in Canadian physiotherapy programs

BACKGROUND: Patients who identify as 2SLGBTQIA + report negative experiences with physiotherapy. The objectives were to evaluate student attitudes, beliefs and perceptions related to 2SLGBTQIA + health education and working with individuals who identify as 2SLGBTQIA + in entry-level physiotherapy programs in Canada and to evaluate physiotherapy program inclusiveness towards 2SLGBTQIA + persons. METHODS: We completed a nationwide, cross-sectional survey of physiotherapy students from Canadian institutions. We recruited students via email and social media from August-December 2021. Frequency results are presented with percentages. Logistic regression models (odds ratios [OR], 95%CI) were used to evaluate associations between demographics and training hours with feelings of preparedness and perceived program 2SLGBTQIA + inclusiveness. RESULTS: We obtained 150 survey responses (mean age = 25 years [range = 20 to 37]) from students where 35 (23%) self-identified as 2SLGBTQIA + . While most students (≥ 95%) showed positive attitudes towards working with 2SLGBTQIA + patients, only 20 students (13%) believed their physiotherapy program provided sufficient knowledge about 2SLGBTQIA + health and inclusiveness. Students believed more 2SLGBTQIA + training is needed (n = 137; 92%), believed training should be mandatory (n = 141; 94%) and were willing to engage in more training (n = 138; 92%). Around half believed their physiotherapy program (n = 80, 54%) and clinical placements (n = 75, 50%) were 2SLGBTQIA + -inclusive and their program instructors (n = 69, 46%) and clinical instructors (n = 47, 31%) used sex/gender-inclusive language. Discrimination towards 2SLGBTQIA + persons was witnessed 56 times by students and most (n = 136; 91%) reported at least one barrier to confronting these behaviours. Older students (OR = 0.89 [0.79 to 0.99]), individuals assigned female at birth (OR = 0.34 [0.15 to 0.77]), and students self-identifying as 2SLGBTQIA + (OR = 0.38 [0.15 to 0.94]) were less likely to believe their program was 2SLGBTQIA + inclusive. Older students (OR = 0.85 [0.76 to 0.94]) and 2SLGBTQIA + students (OR = 0.42 [0.23 to 0.76]) felt the same about their placements. Students who reported \u3e 10 h of 2SLGBTQIA + training were more likely to believe their program was inclusive (OR = 3.18 [1.66 to 6.09]). CONCLUSIONS: Entry-level physiotherapy students in Canada show positive attitudes towards working with 2SLGBTQIA + persons but believe exposure to 2SLGBTQIA + health and inclusiveness is insufficient in their physiotherapy programs. This suggests greater attention dedicated to 2SLGBTQIA + health would be valued

Knowledge, behaviours, and training related to 2SLGBTQIA+ health education amongst entry-level physiotherapy students in Canada: results of a nationwide, cross-sectional survey

BACKGROUND: Individuals who identify as 2SLGBTQIA+ report worse health outcomes than heterosexual/cisgender counterparts, in part due to poor experiences with healthcare professionals. This may stem from inadequate 2SLGBTQIA+ health and inclusiveness training in health professional student education. The purpose of the study was to evaluate knowledge, behaviours, and training related to 2SLGBTQIA+ health education and inclusiveness for entry-level physiotherapy students in Canada. METHODS: We conducted a nationwide, cross-sectional survey with physiotherapy students from accredited Canadian physiotherapy programs. We administered the survey through Qualtrics and recruited students through targeted recruitment emails and social media posts on Twitter and Instagram between August and December 2021. Survey responses are reported as frequencies (percentage). We also completed multivariable logistic regressions to evaluate associations among question responses related to working with 2SLGBTQIA+ individuals (i.e., communication, feeling prepared and assessment competency). Covariates included training hours (\u3c 10/10 + hours) and 2SLGBTQIA+ identity (yes/no). RESULTS: A total of 150 students responded to the survey, with 35 (23%) identifying as 2SLGBTQIA+ . Many students felt confident in communicating effectively with clients who identify as 2SLGBTQIA+ (69%). However, only half (47%) felt comfortable assessing clients who identify as 2SLGBTQIA+ . Routine practice of inclusive behaviours such as using pronouns, considering identities are fluid and a patient\u27s gender identity and/or sexual orientation may shift from one visit to the next, and considering trauma-informed care practices were reported from less than half of the students (\u3c 45%). Around 29% of students reported no 2SLGBTQIA+ training in their physiotherapy program, while 47% reported 0-10 hours, and 24% reported 10 + hours of training. Students with 10 + hours of training had 92% higher odds of feeling competent in assessing 2SLGBTQIA+ clients, compared to those with \u3c 10 hours of training. CONCLUSIONS: Entry-level physiotherapy students in Canada show a lack of understanding and awareness for 2SLGBTQIA+ health and inclusive behaviours which can meaningfully impact patient experience. Students report feeling incompetent when working with 2SLGBTQIA+ patients, which may be associated with lack of 2SLGBTQIA+ training in their programs. Greater efforts and attention towards increasing 2SLGBTQIA+ health education and inclusivity in Canadian entry-level physiotherapy programs is critically needed

Additional file 1 of Knowledge, behaviours, and training related to 2SLGBTQIA+ health education amongst entry-level physiotherapy students in Canada: results of a nationwide, cross-sectional survey

Additional file 1: Supplemental Figure 1. Distribution ofsurvey responses from Canadian physiotherapy students (n=150) for the Lesbian,Gay, Bisexual, and Transgender Development of Clinical Skills Scale(LGBT-DOCSS) Questionnaire