Comment on "Olmsted Syndrome".
Ontology highlight
ABSTRACT:
SUBMITTER: Gatault S
PROVIDER: S-EPMC7292984 | biostudies-literature | 2020
REPOSITORIES: biostudies-literature
Publications
Comment on "Olmsted Syndrome".
Gatault Solene S Kirby Brian B Danso-Abeam Dina D
Case reports in dermatological medicine 20200603
Similar Datasets
Project description:Olmsted syndrome (OS) is a rare disorder characterized by the combination of periorificial, keratotic plaques, and bilateral palmoplantar keratoderma. Synonyms are mutilating palmoplantar keratoderma with periorificial keratotic plaques (ORPHA659, MIM #614594 and #300918). A number sign (#) is used with this entry because of evidence that mutilating palmoplantar keratoderma with periorificial keratotic plaques (OS) is caused by heterozygous mutation in the TRPV3 gene on chromosome 17p13.2. We report three cases of OS, two females and one male in the same family, who presented with palmoplantar keratoderma, sparse scalp hair, cheilitis, and periorificial fissures. We are reporting the cases due to the rarity of occurrence and to highlight the trichoscopy findings.
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| S-EPMC4652067 | biostudies-literature
Project description:Olmsted syndrome (OS) is a rare genodermatosis classically characterized by the combination of bilateral mutilating transgredient palmoplantar keratoderma (PPK) and periorificial keratotic plaques, but which shows considerable clinical heterogeneity. The disease starts usually at birth or in early childhood. About 73 cases have been reported worldwide. OS is observed in both sexes, although male cases are more frequent. The most suggestive symptoms associate PPK with pseudoainhum and periorificial keratotic plaques. Frequently associated features include hair and nail abnormalities, leukokeratosis, corneal default and recurrent infections. Pain and itching are variable but can be severe. Most of reported OS cases are sporadic, although familial cases with different mode of inheritance were also described. Mutations in TRPV3 (Transient receptor potential vanilloid-3) gene have recently been identified as a cause of autosomal dominant (gain-of-function mutations) or recessive OS. Mutations in MBTPS2 (membrane-bound transcription factor protease, site 2) gene were identified in a recessive X-linked form. The diagnosis relies mainly on clinical features associating severe PPK and periorificial keratotic plaques, but can be challenging in patients with incomplete phenotype or atypical features. OS has to be differentiated from other severe forms of PPK including Vohwinkel, Clouston, Papillon-Lefèvre or Haim-Munk syndromes, Mal de Meleda, pachyonychia congenita, Tyrosinemia type II and acrodermatitis enteropathica. When differential diagnoses are difficult to exclude, genetic studies are essential to search for a TRPV3 or MBTPS2 mutation. However, additional genes remain to be identified. No specific and satisfactory therapy is currently available for OS. Current treatments of hyperkeratosis (mainly emollients, keratolytics, retinoids or corticosteroids), either topical or systemic, are symptomatic and offer only temporary partial relief. Specific management of pain and itching is important to reduce the morbidity of the disease. The disease is debilitating and progressive keratoderma and auto-amputation of digits can prevent patients from grasping and walking, and confine them to a wheelchair. New therapeutic options are therefore crucial and are expected from a better understanding of the disease mechanisms. The use of TRPV3 antagonists would represent such a targeted and potentially powerful strategy.
| S-EPMC4373112 | biostudies-literature
Project description:Olmsted syndrome (OS) is a congenital dermatosis characterized by palmoplantar keratoderma and periorificial keratotic plaque. TRPV3 (transient receptor potential vanilloid subtype 3) is the causative gene of OS and encodes a thermosensitive Ca2+-channel. However, the molecular mechanism causing the pathological development of OS is unclear. We aimed to reveal the molecular mechanism underlying the OS pathology from the perspective of lipid metabolism. Comprehensive lipidomics as well as microarray analyses were conducted on samples from non-lesional skin area of an OS rat model (Ht rats). Infiltration of mast cells, eosinophils, and neutrophils and an increase in fibrotic region were detected in unaffected skin area of Ht rats. Among ~600 lipid species examined, levels of 15-lipoxygenase (LOX) metabolites, the precursors of anti-inflammatory and pro-resolving lipid mediators, and dihydroceramides were decreased by ≥16-fold in Ht rats compared to wild type rats. Consistent with the decreases in the 15-LOX metabolites, expression levels of the 15-LOXs, Alox15 and Alox15b, were largely reduced. On the other hand, expression levels of the cytokines/chemokines Il36b, Ccl20, Cxcl1, and Cxcl2 and those of the Ca2+-binding proteins S100a8 and S100a9, which are implicated in epidermal proliferation, were increased. The pro-inflammatory state of Ht rats caused by decreases in 15-LOX metabolites and increases in cytokines/chemokines may contribute to the pathogenesis of OS.
2016-12-01 | GSE84294 | GEO
Project description:Olmsted syndrome (OS) is a rare keratinization disorder, typically characterized by two primary diagnostic hallmarks--mutilating palmoplanter and periorificial keratoderma. However, there's a growing body of literature reporting on the phenotypic diversity of OS, including the absence of aforementioned hallmarks and the presence of some unusual clinical features. Here we presented an atypical familial case of OS that could be confused with Huriez syndrome due to the presence of a scleodactyly-like appearance and tapered fingers in the proband. We ruled out this possibility and made a definitive diagnosis of OS based on clinical features and a genetic assay. Recently, mutations in TRPV3 associated with autosomal dominant or recessive OS continued to be reported, thus conducing to clarifying the underlying relationship between the genotype and phenotype of OS. So we further explored the genotype-phenotype correlation by integrating functionl assays with in silico predictions. Our research not only redefined the phenotypic spectrum of OS, but also provided concrete molecular insights into how mutations in a single gene can lead to significant differences in the severity of this rare disease.
| S-EPMC4763183 | biostudies-literature
Project description:Dravet syndrome (DS, Online Mendelian Inheritance in Man#607208), or severe myoclonic epilepsy in infancy, is one of the most severe types of genetic epilepsy. Individuals with DS face a high risk of sudden unexpected death in epilepsy. In ≥ 75% of cases, DS is associated with mutations of the gene encoding the α1 subunit of the sodium channel, SCN1A. However, the genetic causes of DS without mutations in SCN1A remain largely unknown.
| S-EPMC10695662 | biostudies-literature
Project description:Olmsted syndrome (OS) is a rare congenital disorder characterized by palmoplantar and periorificial keratoderma, alopecia in most cases, and severe itching. The genetic basis for OS remained unidentified. Using whole-exome sequencing of case-parents trios, we have identified a de novo missense mutation in TRPV3 that produces p.Gly573Ser in an individual with OS. Nucleotide sequencing of five additional affected individuals also revealed missense mutations in TRPV3 (which produced p.Gly573Ser in three cases and p.Gly573Cys and p.Trp692Gly in one case each). Encoding a transient receptor potential vanilloid-3 cation channel, TRPV3 is primarily expressed in the skin, hair follicles, brain, and spinal cord. In transfected HEK293 cells expressing TRPV3 mutants, much larger inward currents were recorded, probably because of the constitutive opening of the mutants. These gain-of-function mutations might lead to elevated apoptosis of keratinocytes and consequent skin hyperkeratosis in the affected individuals. Our findings suggest that TRPV3 plays essential roles in skin keratinization, hair growth, and possibly itching sensation in humans and selectively targeting TRPV3 could provide therapeutic potential for keratinization or itching-related skin disorders.
| S-EPMC3309189 | biostudies-literature
Project description:TRPV3 is a non-selective cationic channel and is important for several physiological functions. It can be activated by physiological temperature and selective endogenous and exogenous compounds. TRPV3 is one of the key ion channel involved in Ca2+-signaling in keratinocyte and thus involved in skin-related functions. Recently, naturally occurring mutations in TRPV3, namely G573A, G573S, G573C and W692G have been detected which are linked with the development of pathophysiological conditions such as Olmsted Syndrome (OS) and other skin disorders. Our qualitative and quantitative data suggests that these naturally occurring TRPV3 mutants are mainly restricted in the ER. Expression of OS-mutants cause impaired vesicular trafficking resulting reduced surface localization of these mutants and other membrane proteins too. OS-mutants also cause reduced cell adhesion, altered distribution and less number of lysosomes. Our data confirms that TRPV3 is a lysosomal protein suggesting that Olmsted Syndrome is a lysosomal disorder. These findings may have a broad implication in the context of keratinocyte functions, skin-degeneration and in skin-cancer.
| S-EPMC5463893 | biostudies-literature
Project description:Olmsted syndrome (OS) is a rare congenital skin disorder characterized by severe palmoplantar and periorificial keratoderma, alopecia, onychodystrophy, and severe pruritus. Recently, pathogenic 'gain-of-function' mutations of the transient receptor potential vanilloid 3 gene (TRPV3), which encodes a cation channel involved in keratinocyte differentiation and proliferation, hair growth, inflammation, pain and pruritus, have been identified to cause OS. Due to the rarity, the pattern of inheritance of OS is still unclear. We report a case of OS in a 3-year-old Korean girl and its underlying gene mutation. The patient presented with a disabling, bilateral palmoplantar keratoderma with onychodystrophy. She also exhibited pruritic eczematous skin lesions around her eyes, ears and gluteal fold. Genetic analysis identified a heterozygous p.Gly568Val missense mutation in the exon 13 of TRPV3. To our knowledge, this is the first case of OS in the Korean population showing a missense mutation p.Gly573Ser.
| S-EPMC5823840 | biostudies-literature
Project description:Olmsted syndrome is characterized by symmetrically distributed, destructive, inflammatory palmoplantar keratoderma with periorificial keratotic plaques, most commonly due to gain-of-function mutations in the transient receptor potential vanilloid 3 (TRPV3) gene, which involves multiple pathological functions of the skin, such as hyperkeratosis, dermatitis, hair loss, itching, and pain. Recent studies suggest that mutations of TRPV3 located in different structural domains lead to cases of varying severity, suggesting a potential genotype-phenotype correlation resulting from TRPV3 gene mutations. This paper reviews the genetics and pathogenesis of Olmsted syndrome, as well as the potential management and treatment. This review will lay a foundation for further developing the individualized treatment for TRPV3-related Olmsted syndrome.
| S-EPMC11694452 | biostudies-literature