Soft tissue sarcoma (STS) encompasses a number of neoplasms that are derived from mesenchymal cells including fibrosarcoma, myxosarcoma, hemangiopericytoma, and undifferentiated sarcoma. In the dog, STSs arise frequently in the dermis/subcutis and represent up to 15% of the neoplasms in this location. Our primary aim of this grant was to collect cases of canine STS for histologic and gene expression analysis. Continue reading “Research Update CHF 02783 EY1: Transcriptional Profiling of Canine Soft Tissue Sarcoma”
Right after our AKC Canine Health Foundation grant funding started in March 2020, our lab was closed for 3 months due to COVD-19 and has since been limited to 50% occupancy. In addition, our teaching hospital has had limited appointments since March 2020.
We finished a few validation experiments on our DNA damage assays that were needed before recruitment, and we have started recruiting dogs with bladder cancer and matched controls. We enrolled our first two new cases and two controls this month. Continue reading “Research Update CHF 02780 EY1: Bladder Carcinogen Exposures in Pet Dogs”
Thank you for supporting our project titled “Optical coherence tomography for margin evaluation of skin and subcutaneous neoplasms”. This project is investigating an emerging diagnostic imaging tool, optical coherence tomography that uses light waves to generate real time high-resolution images of tissues for detection of residual cancer cells immediately following surgical removal. Our team involves collaboration between veterinary medicine and pathology at the Ohio State University. We have had excellent progress in our patient enrollment, we completed enrollment of the 80 cases planned already! Continue reading “Research Update CHF 02758 EY1: Optical Coherence Tomography for Margin Evaluation of Canine Skin and Subcutaneous Neoplasms”
We have successfully developed a canine cancer gene panel that we have called the Canine Oncopanel, using cutting-edge, next-generation sequencing technology (NGS). The Canine Oncopanel allows sequencing of 283 cancer-related genes and detection of mutations within these genes that may drive the tumor cells to proliferate and survive. The canine oncopanel sequences a total target region that equates to ~3% of the canine genome. Analyzing the genomic composition of this broad target region allows evaluation of common genomic alterations that can lead to the development of cancer. The Canine Oncopanel is suitable to map mutation profiles and identify driver mechanisms in both common and rare canine cancers to provide a better understanding of the tumor genome and its biology.
The study titled “Investigation into Subclinical Diet- associated Dilated Cardiomyopathy in Four Dog Breeds” is progressing on schedule and nearing completion. Enrollment for the first part of the study is complete and a peer-reviewed manuscript describing the results has been published in the Journal of Veterinary Internal Medicine (DOI: 10.1111/jvim.16075). The results of this part of the study showed higher levels for cardiac troponin I in dogs eating grain-free dog foods or foods that have peas, lentils or potatoes in the top 10 ingredients. Cardiac troponin I is a blood marker that indicates injury to the heart muscle. Even mild elevations can be important but future studies will be needed to determine with certainty that this is the case in these dogs. We did not find echocardiographic (heart ultrasound) differences between dogs eating grain-free and grain-inclusive foods. If the low-level elevation of cardiac troponin I truly indicates low-level heart muscle injury then it may be too early in these healthy dogs to manifest as echocardiographic differences.
RESULTS: New Technology Helps Detect Small Amounts of Drug-Resistant Cancer Cells in Dogs with T-cell Lymphoma.
Morris Animal Foundation-funded researchers from North Carolina State University used state-of-the-art DNA technology to help detect small amounts of drug-resistant cancer cells that persist after treatment in dogs with T-cell lymphoma (minimal residual disease, MRD). Accurately monitoring MRD could provide a fuller picture of the effectiveness of different drugs and improve treatment success, quality of life and survival for these patients. Continue reading “Research Update MAF D16CA-056 Final: Measuring Chemotherapy Drug Resistance in Dogs with T-cell Lymphoma”
The goal for this project is to develop a reliable, accessible, and actionable test to identify dogs at risk for hemangiosarcoma during the earliest stages of disease and to use a strategic, rationally designed approach to prevent its occurrence in these high-risk dogs before it becomes clinically detrimental and life-threatening. The study has two objectives. The first is to determine the most reasonable duration of an SOS test result. In other words, how long can a low-risk SOS test result be trusted and how much time might elapse between a high-risk SOS test result and the development of hemangiosarcoma. The second aim is to continue periodic testing for dogs previously enrolled in the Shine On study whose test result would have placed them in a high-risk category for development of hemangiosarcoma, and to provide eBAT as a strategy for prevention in 12 of these dogs. Continue reading “Research Update CHF 02806-MOU MY1: Strategic Prevention of Canine Hemangiosarcoma: Lifetime Follow-Up”
In the United States, spaying and neutering of dogs and cats is commonly performed to prevent the birth of unwanted pets. However, surgically removing the ovaries or testes may have unexpected consequences. Dogs that have been spayed or neutered have an increased risk for developing obesity, urinary incontinence, hypothyroidism, hyperadrenocorticism, diabetes, cruciate ligament tears, hip dysplasia, and cancer. Lymphoma is three to four times more common in spayed and neutered dogs compared to dogs left intact. In addition, dogs that are neutered before one year of age are three times more likely to develop lymphoma than dogs neutered after one year of age. This funded study is investigating the hormonal and cellular relationships between spaying/neutering and the development of lymphoma so that in the future new treatments will be available to extend life expectancies of dogs with cancer.
Samples obtained from a total of 56 dogs with either confirmed or suspected exposure to Δ9- tetrahydrocannabidiol (Δ9-THC) have been analyzed by both point of care and liquid chromatography/tandem mass spectrometry (LC/MS-MS). Of those enrolled, 55 (98%) were confirmed positive for Δ9-THC by LC/MS-MS on plasma samples. Of the 56 urine samples tested, 17 tested positive using the Alere drug screen iCassette for THC, and 26 tested positive using the NarcoCheck THC Predosage test. Continue reading “Research Update CHF 02692-A EY1: Diagnostic Accuracy of Point of Care Analysis of Canine Urine and Plasma in Marijuana Toxicosis”
Canine chronic enteropathy (CE), is the most common cause of gastrointestinal (GI) disease in canine patients. The exact mechanisms leading to CE are unknown. Unfortunately, treatment for CE currently requires life-long management strategies (i.e. food elimination diets) which can be expensive and labor intensive for owners and/or require the use of medications which carry the risk for significant systemic side effects (i.e. steroids). Continue reading “Research Update CHF 02684-A Final: Evaluation of Serum Zonulin as a Non-invasive Biomarker and Therapeutic Target in Dogs with Chronic Canine Enteropathy”