Erosive, Immune-Mediated Polyarthritis in Dogs (Joint Cartilage Damage) in Dogs
- Occurrence: very rare
- Location of disease: Legs
When to visit the vet?
Urgent see a veterinarian within 24 hours
If the condition worsens / symptoms persist, consult a veterinarian.
Definition
Erosive, immune-mediated polyarthritis in dogs is an inflammatory joint disease caused by the dog’s immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body. and leads to damage to the articular cartilage.
The most important facts at a glance
Erosive, immune-mediated polyarthritis in dogs is an autoimmune disease in which the immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body. attacks the joints, leading to destructionDestruction means "demolition." In medicine, it refers to the destruction of cells, tissues, organs, or body parts. The growth of malignant Tumors is also usually accompanied by destruction of the surrounding tissue. of the articular cartilage. This disease develops when the immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body. can no longer distinguish the body’s own cells from foreign ones, with genetic factors, environmental conditions and infections potentially playing a role. Symptoms include Lameness, a stiff gait, Reluctance to move, and Joint pain. DiagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. is made through a clinical examination, imaging such as X-rayX-ray is an imaging technique that uses X-rays to create images of the inside of the body. It is often used to diagnose bone fractures, lung diseases, and other conditions. and MRI, and laboratory tests. Treatment aims to reduce Inflammatory conditions and modulate the immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body., using anti-inflammatory medications and immunosuppressionImmunosuppression is a state of reduced activity or effectiveness of the immune system. In dogs and cats, immunosuppression can occur naturally or be caused by certain medications, diseases, or medical treatments.. PhysiotherapyVeterinary physiotherapy encompasses a range of treatment methods aimed at improving the mobility and well-being of animals through exercise, massage, and other manual techniques. and supplements can provide support. The prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. depends on the severity of the disease and the response to therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions.. Early diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and consistent treatment are crucial for a good quality of life. PreventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. is difficult, but a balanced diet and regular exercise can reduce the risk. Research focuses on immunological mechanisms, genetic predispositionA predisposition is an innate inclination or susceptibility of an organism to certain diseases or conditions. In dogs and cats, there may be a genetic predisposition to certain conditions such as hip dysplasia or certain heart diseases., and new therapies such as monoclonal antibodies. Non-invasive diagnostic techniques are also being developed to improve early detection.
Causes
Erosive, immune-mediated polyarthritis is one of the autoimmune diseasesAutoimmune diseases are conditions in which the immune system mistakenly attacks the body's own cells or tissues as if they were foreign substances. Examples in dogs and cats include autoimmune hemolytic anemia and systemic lupus erythematosus. in which the immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body. mistakenly attacks the body’s own structures. In this specific form of arthritisArthritis is an inflammation of the joints that can cause pain, swelling, stiffness, and limited mobility. There are many forms of arthritis, including rheumatoid arthritis and osteoarthritis., the joints are affected, and the inflammation leads to destructionDestruction means "demolition." In medicine, it refers to the destruction of cells, tissues, organs, or body parts. The growth of malignant Tumors is also usually accompanied by destruction of the surrounding tissue. of the articular cartilage. Cartilage is an important tissue that covers the ends of bones in a joint and serves as a cushion and a smooth gliding surface.
Immune-mediated diseases develop when the immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body. can no longer distinguish between the body’s own cells and foreign cells. Genetic factors, environmental conditions and infections can contribute to dysregulation of the immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body.. In dogs with erosive polyarthritis, misdirected immune cellsImmune cells are specialized cells of the immune system that help to identify and fight pathogens and foreign substances. These include leukocytes such as lymphocytes (T cells and B cells), macrophages, and dendritic cells. attack joint structures, leading to inflammation and ultimately erosion of the cartilage.
Causes of the disease include genetic predispositions, which may be more common in certain dog breeds. Infections and environmental factors, such as stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. or chemical exposureExposure refers to the Contact with or subjection to certain substances, environmental factors, or pathogens. In veterinary medicine, this can include Contact with toxins, allergens, or infectious agents that can cause health problems in dogs and cats., can also act as triggers. However, the exact cause is often multifactorialMultifactorial refers to conditions or diseases that arise from the interplay of several causes or risk factors. In dogs and cats, these can be genetic predispositions, environmental influences, and nutritional factors that together lead to health problems. and not always clearly identifiable.
Symptoms
The symptoms of erosive, immune-mediated polyarthritis are varied and can vary in severity. The most common symptoms are lameness, swelling, and pain in the affected joints. Affected dogs often show reduced mobility and avoid activities that cause them pain.
In addition to lameness, there may be stiffness of the joints, especially after periods of rest or in the morning. Dogs with this condition may also show general symptoms such as fever, lethargy, and loss of appetite. In advanced stages, the inflammation can lead to permanent joint damage, which significantly impairs the dog’s quality of life.
Diagnosis
DiagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. of erosive, immune-mediated polyarthritis is based on a combination of clinical examination, imaging, and laboratory tests. The veterinarian will first take a thorough medical historyThe medical history is the systematic collection of a patient's medical history through questioning. It includes information about previous illnesses, treatments, allergies, and lifestyle habits. and examine the dog for typical symptoms of the disease.
X-rayX-ray is an imaging technique that uses X-rays to create images of the inside of the body. It is often used to diagnose bone fractures, lung diseases, and other conditions. images of the affected joints can help identify typical changes such as narrowing of the joint space and erosions of the cartilage. In addition, ultrasoundUltrasound refers to sound waves that are above the hearing threshold of the human ear. In medicine, ultrasound is used for diagnostic imaging procedures to visualize internal organs, tissues, and blood flow. examinations and magnetic resonance imaging (MRI)Magnetic resonance imaging is an imaging technique that uses strong magnetic fields and radio waves to create detailed images of the inside of the body. It is used in veterinary medicine to diagnose diseases of the brain, spine, and other organs. can be used to obtain more detailed information about the condition of the joints.
Laboratory tests include blood tests to check inflammatory markerInflammatory markers are substances in the blood that increase in concentration when there are inflammatory conditions in the body. They help with the diagnosis and monitoring of inflammatory conditions in dogs and cats. and autoantibodies that may indicate an immune-mediated disease. A synovial fluid analysis can also be performed to detect inflammatory changes directly in the affected joint.
Therapy
Treatment of erosive, immune-mediated polyarthritis aims to reduce inflammation, relieve Pain, and modulate the immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body.. A key pillar of therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. is anti-inflammatory medication such as NSAIDNSAID stands for "Non-Steroidal Anti-Inflammatory Drugs." These medications are used to reduce inflammatory conditions, pain, and fever. In dogs and cats, NSAIDs must be used with caution, as they can have side effects, especially on the gastrointestinal tract and kidneys. (non-steroidalNon-steroidal refers to medications or substances that are not steroids and often have anti-inflammatory, analgesic, or antipyretic effects. They are used in dogs and cats to treat Pain and Inflammatory conditions. anti-inflammatory drugAnti-inflammatory drugs are medications or substances that help reduce or prevent inflammatory responses in the body. They can be divided into nonsteroidal anti-inflammatory drugs (NSAIDs) and steroidal anti-inflammatory drugs (e.g., corticosteroids).), which helps control Pain and Inflammatory conditions.
ImmunosuppressionImmunosuppression is a state of reduced activity or effectiveness of the immune system. In dogs and cats, immunosuppression can occur naturally or be caused by certain medications, diseases, or medical treatments. can also be used to dampen the overactive immune responseAn immune response is the immune system's reaction to foreign substances (antigens), such as microorganisms or proteins. It involves a series of processes aimed at recognizing, fighting, and eliminating these antigens.. These medications are important to prevent progressionProgression refers to the advancement or worsening of a disease over time. It describes an increase in the severity or extent of the disease symptoms. of joint damage. In some cases, the veterinarian may also prescribe corticosteroidsCorticosteroids are a class of steroid hormones that occur naturally in the body and can also be produced synthetically. They have anti-inflammatory and immunosuppressive properties and are used in veterinary medicine to treat a variety of conditions. to treat acuteAcute refers to a condition that occurs suddenly and is usually of short duration. In a medical context, it describes symptoms or illnesses that can quickly become serious and require immediate attention. flare-ups of the disease.
In addition to drug therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions., physiotherapyVeterinary physiotherapy encompasses a range of treatment methods aimed at improving the mobility and well-being of animals through exercise, massage, and other manual techniques. can be helpful to maintain joint mobility and prevent muscle atrophyMuscle atrophy is the loss of muscle mass that can be caused by inactivity, malnutrition, or certain diseases. In dogs and cats, muscle atrophy can occur due to chronic diseases, aging, or after prolonged immobilization.. A balanced diet and supplements containing omega-3 fatty acids and glucosamine can also provide support.
Prognosis and follow-up care
The prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. for dogs with erosive, immune-mediated polyarthritis depends on the severity of the disease and the response to treatment. With early diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and consistent therapy, many dogs can maintain a good quality of life and the progressionProgression refers to the advancement or worsening of a disease over time. It describes an increase in the severity or extent of the disease symptoms. of the disease can be slowed.
However, the disease can be chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. and often requires lifelong treatment and monitoring. Without appropriate therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions., severe joint damage can occur, significantly limiting the dog’s mobility and reducing its quality of life.
Prevention
Because the exact cause of erosive, immune-mediated polyarthritis is often multifactorialMultifactorial refers to conditions or diseases that arise from the interplay of several causes or risk factors. In dogs and cats, these can be genetic predispositions, environmental influences, and nutritional factors that together lead to health problems., there is no specific prevention measure that can completely prevent the disease. However, some general measures can reduce the risk of developing it.
A balanced diet and a healthy weight can help support joint health and avoid overstressing them. Regular exercise is also important to maintain joint function, but should be adapted to the needs of the dog to avoid overexertion.
Regular veterinary check-ups are crucial to detect early signs of joint disease and take action if needed. In dogs with a genetic predispositionA predisposition is an innate inclination or susceptibility of an organism to certain diseases or conditions. In dogs and cats, there may be a genetic predisposition to certain conditions such as hip dysplasia or certain heart diseases. to autoimmune disease, close monitoring and early intervention can be beneficial.
Outlook on current research
Research into erosive, immune-mediated polyarthritis in dogs is currently focused on understanding the exact immunological mechanisms that lead to this disease. A particular focus is on the role of different immune cellsImmune cells are specialized cells of the immune system that help to identify and fight pathogens and foreign substances. These include leukocytes such as lymphocytes (T cells and B cells), macrophages, and dendritic cells. and the cytokines they produce—signaling molecules that regulate Inflammatory conditions in the body. Researchers are trying to determine which specific cell types and signaling pathways in the joints of affected dogs are overactive and lead to the cartilage destructionDestruction means "demolition." In medicine, it refers to the destruction of cells, tissues, organs, or body parts. The growth of malignant Tumors is also usually accompanied by destruction of the surrounding tissue. observed. These insights could help develop targeted therapeutics that act specifically on these pathways and thus stop inflammation and progressiveProgressive describes a condition or disease that worsens over time. This term is often used to characterize the course of an illness that causes increasingly severe symptoms or damage. cartilage damagecartilage damage are injuries or wear and tear of the cartilage tissue that covers and protects joints, ribs, ears, and other body parts. Damage can be caused by injuries, wear and tear, or conditions such as arthritis, leading to Pain and restricted movement..
Another exciting area of research is the genetic predispositionA predisposition is an innate inclination or susceptibility of an organism to certain diseases or conditions. In dogs and cats, there may be a genetic predisposition to certain conditions such as hip dysplasia or certain heart diseases. to this type of arthritisArthritis is an inflammation of the joints that can cause pain, swelling, stiffness, and limited mobility. There are many forms of arthritis, including rheumatoid arthritis and osteoarthritis. in dogs. Scientists are investigating which genetic markers or mutations are associated with a higher risk of developing the disease. By identifying genetic factors, researchers hope to support breeding programs that can reduce the risk of this disease. In addition, genetic tests could be developed to identify at-risk dogs early.
Current studies are also exploring the use of newer biological therapies, such as monoclonal antibodies, that block specific inflammatory mediators. These therapies could enable more precise treatment by modulating the immune responseAn immune response is the immune system's reaction to foreign substances (antigens), such as microorganisms or proteins. It involves a series of processes aimed at recognizing, fighting, and eliminating these antigens. without suppressing the entire immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body.. Early clinical studies have already shown promising results, with affected dogs showing a marked reduction in inflammatory symptoms and an improvement in quality of life.
Research is also looking at the role of diet and supplements in supporting joint health and reducing inflammation. Omega-3 fatty acids, glucosamine and chondroitin are some of the supplements being studied to assess their potentially beneficial effects on joint health in dogs with immune-mediated polyarthritis.
Another aspect of research focuses on developing non-invasive diagnostic techniques to detect the disease early and monitor progressionProgression refers to the advancement or worsening of a disease over time. It describes an increase in the severity or extent of the disease symptoms.. Imaging methods such as magnetic resonance imaging (MRI)Magnetic resonance imaging is an imaging technique that uses strong magnetic fields and radio waves to create detailed images of the inside of the body. It is used in veterinary medicine to diagnose diseases of the brain, spine, and other organs. and advanced ultrasoundUltrasound refers to sound waves that are above the hearing threshold of the human ear. In medicine, ultrasound is used for diagnostic imaging procedures to visualize internal organs, tissues, and blood flow. techniques are being tested to improve accuracy and reliability in assessing joint damage. In the future, these technologies could enable earlier diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and individually tailored therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. planning.