Peer-reviewed veterinary case report
Dog genes linked to brain inflammation disease in Chihuahuas
By Oshima, Ayaka et al.·Published in The Journal of veterinary medical science·2023·Department of Veterinary Medicine, Japan·View original on PubMed →
PetCaseFinder translated the abstract of this peer-reviewed paper into plain English so pet owners can read it. We do not publish original research — every detail traces back to the citation above. How we work →
Original publication title: Dog leukocyte antigen class II alleles and haplotypes associated with meningoencephalomyelitis of unknown origin in Chihuahuas.
- Species:
- dog
Plain-English summary
A group of Chihuahuas with neurological symptoms was studied to understand a serious condition called meningoencephalomyelitis of unknown origin (MUO), which is believed to be caused by the immune system attacking the brain. Researchers found that a specific genetic marker was much more common in the affected dogs compared to healthy ones, suggesting a genetic link to this disease. This study highlights that certain breeds, like Chihuahuas, may have unique genetic factors that make them more susceptible to this condition. Understanding these genetic risks could help veterinarians better diagnose and treat affected dogs in the future.
People also search for: Chihuahua neurological symptoms · dog immune system brain disease · meningoencephalomyelitis treatment in dogs
Abstract
Idiopathic non-infectious meningoencephalomyelitis (NIME), which is thought to be an immune-mediated disease, is a common inflammatory disease in dogs. Meningoencephalomyelitis of unknown origin (MUO), a subgroup of NIME, consists of necrotizing meningoencephalitis (NME), necrotizing leukoencephalitis, and granulomatous meningoencephalomyelitis. Recent studies have shown associations between disease development and dog leukocyte antigen (DLA) class II genes in NME in Pugs and in NIME in Greyhounds. This study focused on Chihuahuas, which have a high incidence of MUO and are one of the most common dog breeds in Japan. Because the development of MUO seems to be associated with DLA class II genes, we aimed to evaluate the association between DLA class II genes and MUO development in Chihuahuas. Blood samples were obtained from 22 Chihuahuas with MUO (MUO group) and 46 without neurological diseases (control). The allele sequences of three DLA class II loci were determined, and haplotypes were estimated from these data. In total, 23 haplotypes were detected. The frequency of one haplotype (DLA-DRB1*015:01--DQA1*006:01--DQB1*023:01) was significantly higher in the MUO group than in the control group (odds ratio, 7.11; 95% confidence interval, 1.37-36.81; P=0.0141). The results suggest that the development of MUO in Chihuahuas may be associated with DLA class II genes. Because the identified risk haplotypes differed from those of other breeds, the pathogenesis of NIME-related diseases may differ among dog breeds.
Find similar cases for your pet
PetCaseFinder finds other peer-reviewed reports of pets with the same symptoms, plus a plain-English summary of what was tried across them.
Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/36418080/