A patient-derived LMX1B variant causes tissue-specific manifestations of nail-patella syndrome in mice
- 1RIKEN BioResource Research Center
Abstract
Nail-patella syndrome (NPS) is a multisystem disorder caused by pathogenic variants in LMX1B and is characterized by dysplasia of the nails and patellae as well as extraskeletal complications such as progressive nephropathy and glaucoma. We generated a CRISPR/Cas9 knock-in mouse carrying the R252Q substitution, corresponding to a human LMX1B variant associated with renal-predominant disease. Phenotypic analysis revealed that homozygous mice were viable, but they displayed marked growth retardation and severe bilateral ocular opacity. Interestingly, while this model exhibited clear skeletal and ocular defects, the renal phenotype was relatively mild, although increased urinary albumin excretion, focal glomerular basement membrane abnormalities, and subtle changes in renal gene expression were detected. Beyond the classical NPS hallmarks, mutant mice also displayed midbrain morphological abnormalities, suggesting broader developmental consequences of this LMX1B variant. This patient-derived variant model not only recapitulates the pleiotropic features of NPS but also demonstrates organ-specific susceptibility to the R252Q substitution, providing a foundation for elucidating the complex molecular mechanisms underlying multisystem disease.
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BibTeX
@misc{amano2026patientderived,
title = {{A patient-derived LMX1B variant causes tissue-specific manifestations of nail-patella syndrome in mice}},
author = {T. Amano and K. Yoshida and F. Sultana and C. Imura and M. Shiokawa and H. Shibuya and K. Takemura and K. Ikeda and C. Otsuka and K. Shinbo and M. Tamura and S. Mizuno},
howpublished = {bioRxiv},
year = {2026},
month = aug,
doi = {10.64898/2026.08.28.747744},
url = {https://www.biorxiv.org/content/10.64898/2026.08.28.747744v1},
note = {CC BY},
}
RIS
TY - UNPB
TI - A patient-derived LMX1B variant causes tissue-specific manifestations of nail-patella syndrome in mice
AU - T. Amano
AU - K. Yoshida
AU - F. Sultana
AU - C. Imura
AU - M. Shiokawa
AU - H. Shibuya
AU - K. Takemura
AU - K. Ikeda
AU - C. Otsuka
AU - K. Shinbo
AU - M. Tamura
AU - S. Mizuno
PY - 2026
DA - 2026/08/28
PB - bioRxiv
DO - 10.64898/2026.08.28.747744
UR - https://www.biorxiv.org/content/10.64898/2026.08.28.747744v1
AB - Nail-patella syndrome (NPS) is a multisystem disorder caused by pathogenic variants in LMX1B and is characterized by dysplasia of the nails and patellae as well as extraskeletal complications such as progressive nephropathy and glaucoma. We generated a CRISPR/Cas9 knock-in mouse carrying the R252Q substitution, corresponding to a human LMX1B variant associated with renal-predominant disease. Phenotypic analysis revealed that homozygous mice were viable, but they displayed marked growth retardation and severe bilateral ocular opacity. Interestingly, while this model exhibited clear skeletal and ocular defects, the renal phenotype was relatively mild, although increased urinary albumin excretion, focal glomerular basement membrane abnormalities, and subtle changes in renal gene expression were detected. Beyond the classical NPS hallmarks, mutant mice also displayed midbrain morphological abnormalities, suggesting broader developmental consequences of this LMX1B variant. This patient-derived variant model not only recapitulates the pleiotropic features of NPS but also demonstrates organ-specific susceptibility to the R252Q substitution, providing a foundation for elucidating the complex molecular mechanisms underlying multisystem disease.
ER -