Publications by authors named "Duncan Lascelles"

Cultural transmission of breed-specific beliefs about canine pain sensitivity occurs during veterinary education and training. However, breed-specific beliefs held by veterinarians do not align well with experimental measures of pain observed across dog breeds and are unlikely to be helpful in clinical decision making. The aim of the present study was to gain a deeper understanding of dog breed pain stereotypes are developed and/or reinforced during clinical veterinary training.

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  • Current regulations on supplements for pets are lacking, making it tough for veterinarians to offer solid, evidence-based advice to dog owners about their effectiveness.
  • A study tested the efficacy of three treatments (EAB-277, 4CYTE, and meloxicam) against a placebo on dogs with hip osteoarthritis to observe changes in pain and mobility.
  • Results showed that both EAB-277 and meloxicam significantly improved dogs' pain levels and mobility, while 4CYTE didn’t show any notable difference from the placebo treatment.
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  • * Traditional treatments like nonsteroidal anti-inflammatory drugs and opioids can lead to serious side effects and may not provide enough relief for many patients.
  • * Recent research on neurotrophic factors, particularly the glial cell line-derived neurotrophic factor (GDNF) family, offers insights into potential new therapies targeting these signaling pathways for better pain management.
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Objective: To evaluate nonsurgical management outcomes of cleft palate (CP) in dogs and identify any association between cleft size, prevalence of clinical signs, and quality of life (QoL).

Methods: 65 dogs treated conservatively for CP from January 2006 through December 2023 were retrospectively identified. Diet, activity, medical history, and QoL were recorded for dogs that survived to the transition to solid food.

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Objective: The purpose of this study was to enhance the current knowledge of the relationship between the gut microbiome and osteoarthritis (OA) and associated pain using pet dogs as a clinically relevant translational model.

Methods: Fecal samples were collected from 93 owned pet dogs. Dogs were designated as either clinically healthy or OA pain using validated methods.

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Ketamine is an injectable anesthetic agent with analgesic and antidepressant effects that can prevent maladaptive pain. Ketamine is metabolized by the liver into norketamine, an active metabolite. Prior rodent studies have suggested that norketamine is thought to contribute up to 30% of ketamine's analgesic effect.

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This study aimed to determine the prevalence of osteoarthritis (OA) and associated clinical signs in young dogs. Owners of dogs aged 8 months-4 years from a single practice, were contacted in random order, to participate in a general health screen. Clinical and orthopedic examinations were performed.

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Bone injuries such as fractures are one major cause of morbidities worldwide. A considerable number of fractures suffer from delayed healing, and the unresolved acute pain may transition to chronic and maladaptive pain. Current management of pain involves treatment with NSAIDs and opioids with substantial adverse effects.

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Dog breed stereotypes are frequently used to inform people's expectations about canine behavior, despite evidence that breed is largely uninformative in predicting individual dog behavior. Further, these beliefs differ among populations. However, it remains unknown how ratings of warmth toward a breed are associated with ratings of other social behavioral domains, and whether differences exist between populations with varying experience with dogs.

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Over 95% of veterinarians report believing that dog breeds differ in pain sensitivity. Ratings made by veterinarians differ from those of the general public, suggesting these beliefs may be learned during veterinary training or clinical experiences. Therefore, the current study's primary objective was to evaluate dog breed pain sensitivity ratings during veterinary training and compare these ratings to those of the general public and undergraduates in animal-health related fields.

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This report describes consensus guidelines and recommendations for the treatment of canine osteoarthritis (OA) according to the "Canine OsteoArthritis Staging Tool excluding radiography" (COASTeR) stage of OA, by the COAST Development Group. The recommendations are based on evidence-based medicine and clinical experience and are proposed with international relevance in mind. The aim is to provide veterinarians with a practical reference to consolidated information and to support the development of patient-specific OA management protocols and informed treatment choices based on the stage of OA.

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Background: Veterinarians hold distinct breed-specific pain sensitivity beliefs that differ from the general public but are highly consistent with one another. This is remarkable as there is no current scientific evidence for biological differences in pain sensitivity across dog breeds. Therefore, the present study evaluated whether pain sensitivity thresholds differ across a set of dog breeds and, if so, whether veterinarians' pain sensitivity ratings explain these differences or whether these ratings are attributed to behavioral characteristics.

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Introduction: Patients developing acute radiotherapy induced dermatitis or oral mucositis commonly experience pain. When severe, this radiotherapy-associated pain (RAP) can necessitate treatment breaks; unfortunately, in a variety of cancers, prolongation of the radiotherapy course has been associated with early cancer relapse and/or death. This is often attributed to accelerated repopulation, but it is unknown whether pain or pain signaling constituents might alter tumor behavior and hasten metastatic disease progression.

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Article Synopsis
  • The study examined the efficacy of glucosamine hydrochloride and chondroitin sulfate, PCSO-524, EAB-277, and carprofen for treating hip osteoarthritis (OA) in dogs through a double-blinded clinical trial with 75 dogs.
  • At 2, 4, and 6 weeks, carprofen, PCSO-524, and EAB-277 showed significant increases in peak vertical force (PVF), indicating improved mobility, while glucosamine and placebo groups did not demonstrate significant changes.
  • The research concluded that PCSO-524 and EAB-277 were effective in enhancing PVF over time, similar to carprofen, whereas glucosamine/chondroitin did not
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Maintaining an active lifestyle is considered a hallmark of successful aging. Physical activity significantly reduces the risk of cognitive decline and Alzheimer's disease in humans. However, pain and lack of motivation are important barriers to exercise.

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Client-reported outcomes measures (CROMs) have been previously validated for the evaluation of canine osteoarthritis. A published systematic review indicated that the 'Liverpool Osteoarthritis in Dogs' (LOAD) and the 'Canine Orthopedic Index' (COI) can be recommended for use in dogs with osteoarthritis; these CROMs have also been used in the context of measuring surgical outcomes of dogs with orthopaedic conditions. However, the minimal clinically-important differences (MCIDs) for these CROMs have not been investigated.

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Objective: To explore relationships between 9-axis inertial measurement unit (IMU) output and activities of varying intensity in dogs of various sizes.

Animals: 20 healthy, agility course-trained dogs of various ages and sizes.

Procedures: Height, weight, body condition score, age, length from IMU to the ischium, and height of IMU to the floor were recorded.

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Relatively little work has evaluated both the disease of osteoarthritis (OA) and clinically-relevant pain outcome measures across different OA models in rats. The objective of this study was to compare sensitivity, pain, and histological disease severity across chemical and surgical models of OA in the rat. Stifle OA was induced in Sprague-Dawley rats via intraarticular injection of monoiodoacetate (MIA) or surgical transection of anterior cruciate ligament and/or destabilization of medial meniscus (ACL+DMM or DMM alone).

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Background: Accelerometry has been used to evaluate activity in dogs with osteoarthritis (OA) pain, especially in relation to effect of treatment; however no studies have compared accelerometry-measured activity in dogs with OA-pain and healthy dogs. The aims of this study were to (1) compare activity output from the PetPace collar with the validated Actical monitor and (2) determine if PetPace collar outputs (overall activity, activity levels, body position, and vital signs) differed between healthy dogs and dogs with OA-pain.

Methods: This was an observational, non-interventional study in healthy dogs and dogs with OA-pain.

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The use of spontaneous painful disease in companion pet animals has been highlighted as one of the changes that could be made to help improve translation of basic science to new therapeutics, acting as a bridge between preclinical and clinical studies, with the goal of accelerating the approval of new therapeutics. This review focuses on the utility of companion pet dogs for translational research by reviewing what outcome measures can be measured, and importantly, the relevance of these outcome measures to human translational research. It also details the practical considerations involved in incorporating companion dogs into human therapeutic development.

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Aging is associated with impairment in postural control in humans. While dogs are a powerful model for the study of aging, the associations between age and postural control in this species have not yet been elucidated. The aims of this work were to establish a reliable protocol to measure center of pressure excursions in standing dogs and to determine age-related changes in postural sway.

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Tumor necrosis factor-α (TNF-α) is a potential target for osteoarthritis (OA) treatment. In several recent clinical studies in human OA, anti-TNF-α therapy showed promising results; however, these were open-label and based on patient-reported outcome measures. In this study, we developed a caninized TNF-α receptor-Fc (caTNFR-Fc) fusion protein and conducted a non-randomized, open-label, pilot study in dogs with OA using objectively measured ground reaction forces and activity.

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Objective: To report indications, complications, and long-term outcomes following feline total hip replacement (THR) using a client-based clinical metrology questionnaire, the Feline Musculoskeletal Pain Index (FMPI), and owner satisfaction.

Study Design: Multi-institutional retrospective cohort study.

Animals: Cats (n = 44) that underwent THR (n = 56).

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Article Synopsis
  • The center of mass (CoM) is the point in a dog's body where mass is evenly distributed, significantly influencing balance and movement, yet this concept is not well-explored in canine studies.
  • This study aimed to assess the CoM variance in different breeds of client-owned dogs and examine how it relates to their physical dimensions and data from an inertial measurement unit (IMU) placed on a neck collar.
  • Findings showed that the average CoM could be calculated in three planes (transverse, sagittal, and dorsal) and indicated that dog length is crucial for understanding the relationship between the CoM and other measurable variables, suggesting that normalization methods based on CoM might improve data consistency in future dog studies.
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