ArticleJCI insight2024
Dysregulation of RAS proteostasis by autosomal-dominant LZTR1 mutation induces Noonan syndrome-like phenotypes in mice.
Article in JCI insight, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Role of small intronic RNAs in the crosstalk between immune cells and β-cells during type 1 diabetes development.RNA biology · 2026Article
- Clinical consensus guidelines for the management of Noonan syndrome in Japan.Clinical pediatric endocrinology : case reports and clinical investigations : official journal of the Japanese Society for Pediatric Endocrinology · 2026Article
- Article
- LZTR1 Loss Reduces Vimentin Expression and Motility in Hep3B Hepatocellular Carcinoma Cells.International journal of molecular sciences · 2026Article
- Phenotypic Analysis of Embryos in a Noonan Syndrome Model Mouse With the Rit1 A57G Mutation.Molecular genetics & genomic medicine · 2025Article
- Article
- Structural basis for LZTR1 recognition of RAS GTPases for degradation.Science (New York, N.Y.) · 2025Article
- Abernethy malformation (Type II) presenting in a 6-day-old boy with Noonan syndrome: a case report.BMC pediatrics · 2025Article
- Article
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6 authors.
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Abstract
Leucine-zipper-like posttranslational regulator 1 (LZTR1) is a member of the BTB-Kelch superfamily, which regulates the RAS proteostasis. Autosomal dominant (AD) mutations in LZTR1 have been identified in patients with Noonan syndrome (NS), a congenital anomaly syndrome. However, it remains unclear whether LZTR1 AD mutations regulate the proteostasis of the RAS subfamily molecules or cause NS-like phenotypes in vivo. To elucidate the pathogenesis of LZTR1 mutations, we generated 2 LZTR1 mutation knock-in mice (Lztr1G245R/+ and Lztr1R409C/+), which correspond to the human p.G248R and p.R412C mutations, respectively. LZTR1-mutant male mice exhibit low birth weight, distinctive facial features, and cardiac hypertrophy. Cardiomyocyte size and the expression of RAS subfamily members, including MRAS and RIT1, were significantly increased in the left ventricles (LVs) of mutant male mice. LZTR1 AD mutants did not interact with RIT1 and functioned as dominant-negative forms of WT LZTR1. Multi-omics analysis revealed that the mitogen-activated protein kinase (MAPK) signaling pathway was activated in the LVs of mutant mice. Treatment with the MEK inhibitor trametinib ameliorated cardiac hypertrophy in mutant male mice. These results suggest that the MEK/ERK pathway is a therapeutic target for the NS-like phenotype resulting from dysfunction of RAS proteostasis by LZTR1 AD mutations.
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