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- W4313430136 abstract "Abstract Systemic lupus erythematosus (SLE) is a multi-system autoimmune disease. The cause of SLE is not only genetic; in fact, environmental factors may play a more important role in disease development. The MRL/lpr mouse model lupus-like symptoms due to multiple SLE susceptible loci in the MRL background, and offers an accelerated model compared to the MRL parent strain due to the Faslpr mutation. Recently, our laboratory witnessed a loss of disease phenotype in our in-house colony of MRL/lpr mice. We thus compared mice newly obtained from The Jackson Laboratory (JAX; Stock Number 000485) to our in-house mice. The single-nucleotide polymorphism (SNP) analysis showed no genetic drift, suggesting that environmental factors could be triggering a phenotypic drift. Surprisingly, the newly purchased JAX mice also had attenuation of glomerulonephritis. Even though JAX mice manifested similar attenuation of lupus nephritis, our in-house colony showed differences in organ weights. Furthermore, males showed a significantly higher level of anti-double stranded DNA auto-IgG consistent with germinal center maturation. In addition, in-house males had significantly higher levels of microRNA-21 and microRNA-183 explaining spleen size difference. Moreover, the composition of gut microbiota was different between in-house and new JAX mice at early age, with many groups of bacteria differing at later time points, which might explain some of the phenotypic differences. These results suggest that microRNAs and gut microbiota might be responsible for the phenotypic differences of MRL/lpr mice in JAX and our colonies as they were genetically identical. On the other hand, the attenuation of nephritis in both groups requires further investigation. Supported by R01AR073240" @default.
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- W4313430136 date "2022-05-01" @default.
- W4313430136 modified "2023-09-26" @default.
- W4313430136 title "Importance of microRNAs and gut microbiota in the characterization of a phenotypic drift in lupus-prone MRL/lpr mice." @default.
- W4313430136 doi "https://doi.org/10.4049/jimmunol.208.supp.158.12" @default.
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