4.5 Review

Uncovering incontinentia pigmenti: From DNA sequence to pathophysiology

期刊

FRONTIERS IN PEDIATRICS
卷 10, 期 -, 页码 -

出版社

FRONTIERS MEDIA SA
DOI: 10.3389/fped.2022.900606

关键词

incontinentia pigmenti; IKBKG/NEMO; NF kappa B pathway; pathophysiology; molecular diagnosis; genotype-phenotype

资金

  1. Ministry of Education (MOE) [FRGS/1/2019/SKK08/TAYLOR/02/2, FRGS/1/2020/SKK01/UPM/02/1, FRGS/1/2019/STG05/TAYLOR/03/3]

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The translation provides an overview of the genetic mutations, clinical manifestations, and pathophysiology of incontinentia pigmenti. Further research is needed to understand the clinical genotype-phenotype correlation and develop personalized treatment strategies.
Incontinentia pigmenti (IP) is an X-linked dominant genodermatosis. The disease is known to be caused by recurrent deletion of exons 4-10 of the Inhibitor Of Nuclear Factor Kappa B Kinase Regulatory Subunit Gamma (IKBKG) gene located at the Xq28 chromosomal region, which encodes for NEMO/IKKgamma, a regulatory protein involved in the nuclear factor kappa B (NF-kappa B) signaling pathway. NF-kappa B plays a prominent role in the modulation of cellular proliferation, apoptosis, and inflammation. IKBKG mutation that results in a loss-of-function or dysregulated NF-kappa B pathway contributes to the pathophysiology of IP. Aside from typical skin characteristics such as blistering rash and wart-like skin growth presented in IP patients, other clinical manifestations like central nervous system (CNS) and ocular anomalies have also been detected. To date, the clinical genotype-phenotype correlation remains unclear due to its highly variable phenotypic expressivity. Thus, genetic findings remain an essential tool in diagnosing IP, and understanding its genetic profile allows a greater possibility for personalized treatment. IP is slowly and gradually gaining attention in research, but there is much that remains to be understood. This review highlights the progress that has been made in IP including the different types of mutations detected in various populations, current diagnostic strategies, IKBKG pathophysiology, genotype-phenotype correlation, and treatment strategies, which provide insights into understanding this rare mendelian disorder.

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