Systemic Lupus Erythematosus

TL;DR. Systemic Lupus Erythematosus (SLE) is a rare, multi-system autoimmune disease in dogs and cats where the body's immune system attacks its own tissues, causing widespread inflammation, joint pain, skin lesions, and organ

Systemic Lupus Erythematosus can cause painful joint inflammation and persistent fatigue in dogs.

Qué es

Systemic Lupus Erythematosus (SLE) is a multi-systemic immune-mediated disease. In a healthy pet, the immune system acts as a shield, defending the body against foreign invaders like bacteria and viruses. In a pet with SLE, this protective system malfunctions. It loses the ability to distinguish between "self" and "non-self," leading to the production of autoantibodies. These autoantibodies target the pet's own cellular components, particularly the nuclei of cells. As described in a leading vete

"Systemic lupus erythematosus is a multisystemic immune-mediated disease characterized by the production of a variety of autoantibodies (e. g. , ANA, rheumatoid factor, anti-RBC antibodies) that form circulating immune complexes."

Causas y factores de riesgo

The exact cause of SLE is complex and not fully understood, but it is widely accepted to be a combination of genetic predisposition and environmental triggers. Genetics play a significant role in who develops the disease. Certain dog breeds are statistically more likely to develop SLE, suggesting an inherited genetic component. As noted in a leading veterinary internal medicine reference: Environmental factors such as ultraviolet (UV) light exposure can trigger or worsen skin lesions associated

Signos

• Polyarthritis: This is the most common sign of SLE. It causes inflammation in multiple joints, leading to stiffness, pain, and a "shifting-leg" lameness where the pet limps on different legs at different times.
• Fever: A persistent, fluctuating high temperature that does not respond to standard antibiotic therapy.
• Glomerulonephritis: Inflammation of the kidney's filtering units. This leads to protein leaking into the urine and can progress to kidney failure.
• Dermatologic lesions: Skin issues including redness, scaling, crusting, hair loss, and deep ulcers. These lesions are most common on the face, bridge of the nose, ears, and footpads, and they often worsen with exposure to sunlight.
• Polymyositis: Inflammation of the muscles, leading to generalized muscle pain, weakness, or muscle wasting.
• Anemia and Thrombocytopenia: Immune-mediated destruction of red blood cells (causing pale gums, weakness, and lethargy) or platelets (causing pinpoint bruising, nosebleeds, or blood in the stool).

Cuándo acudir al veterinario

If your pet has been diagnosed with SLE or is undergoing diagnostic testing, you must monitor them closely for sudden changes. Contact your veterinarian immediately if you observe any of the following emergency red flags: * Sudden weakness, collapse, or extremely pale gums (signs of severe anemia). * Unexplained bruising, pinpoint red spots on the skin or gums, or active bleeding

Diagnóstico

Diagnosing SLE is a complex process. There is no single test that can definitively confirm the disease on its own. Instead, your vet will look at the entire clinical picture, combining your pet's medical history, physical examination findings, and a series of specialized laboratory tests. To help guide the diagnosis, veterinarians often use a points-based system of "major" and "minor" clinical sig

Tratamiento

The primary goal of treating SLE is to suppress the overactive immune system, reduce inflammation, and manage pain. Treatment is typically divided into first-line and second-line therapies. ### First-Line Therapy * Glucocorticoids (Corticosteroids): High doses of prednisone or prednisolone are the cornerstone of initial treatment. These medications rapid

Prevención y vida diaria

Because SLE is an inherited, complex autoimmune disease, there is no known way to prevent it from developing. To reduce the prevalence of this disease, dogs from breeds with a known genetic predisposition (such as German Shepherds, Collies, and Shetland Sheepdogs) should not be bred if they or their close relatives have been diagnosed with SLE or

Fuentes

Veterinary internal medicine references for this condition.

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