RESUMEN
STING-associated vasculopathy with onset in infancy (SAVI) is a rare, monogenic interferonopathy caused by gain-of-function variants in STING1 (TMEM173) characterized by systemic inflammation, cutaneous vasculopathy, and interstitial lung disease. We report a case of SAVI attributed to a novel STING1 p.R284T variant who demonstrated characteristic cutaneous features including telangiectasias, livedo and acrocyanotic changes on face and extremities, as well as saddle nose deformity, failure to thrive, inflammatory arthritis and notable lack of pulmonary disease or autoantibody positivity. Due to the risk for progressive and irreversible lung and tissue damage and evolving therapeutic landscape involving the use of Janus kinase inhibitors, it is critical to recognize variable clinical phenotypes to diagnose and consider treatment options for SAVI patients early in their disease course.
Asunto(s)
Proteínas de la Membrana , Humanos , Proteínas de la Membrana/genética , Enfermedades Cutáneas Vasculares/genética , Enfermedades Cutáneas Vasculares/diagnóstico , Enfermedades Cutáneas Vasculares/patología , Lactante , Masculino , Femenino , Mutación con Ganancia de FunciónRESUMEN
Cutis marmorata telangiectatica congenita (CMTC) is characterized by coarse-meshed capillary malformations arranged in asymmetrically distributed patches. The disorder may be associated with hyper- or hypoplastic limbs, syndactyly, cleft palate, and glaucoma. Because the disease usually occurs sporadically, the concept of a lethal mutation surviving by mosaicism was proposed about 30 years ago. Here we describe three children with CMTC due to a postzygotic GNA11 mutation c547C > T (p.Arg183Cys), documented in saliva (patient 1) or lesional cutaneous tissue (patients 2 and 3). All three individuals had widespread and asymmetric CMTC which was present from birth and became fainter during the first years of life. Variably associated anomalies included glaucoma, choroidal capillary malformation, and body asymmetry. In previous case reports, postzygotic GNA11 mutations were documented in two cases of phacomatosis cesiomarmorata, being characterized by CMTC coexisting with segmental dermal melanocytosis. Moreover, postzygotic GNA11 mutations were noted in two CMTC patients described under the incorrect diagnosis of "nevus vascularis mixtus". Hence, the present cases convincingly support the concept that CMTC can be caused by mosaic GNA11 mutations and thus belongs to the GNA11-Related Capillary Nevus (GNARCAN) spectrum. In two other bona fide cases of CMTC, however, we were unable to find a mutation in GNA11, which may be explained either by our inability to detect a very low percentage of mutant cells or by genetic heterogeneity of the phenotype.
Asunto(s)
Glaucoma , Nevo , Enfermedades Cutáneas Vasculares , Telangiectasia , Capilares/anomalías , Subunidades alfa de la Proteína de Unión al GTP , Humanos , Livedo Reticularis , Mutación , Nevo/complicaciones , Enfermedades Cutáneas Vasculares/complicaciones , Enfermedades Cutáneas Vasculares/diagnóstico , Enfermedades Cutáneas Vasculares/genética , Telangiectasia/congénito , Telangiectasia/genética , Malformaciones VascularesAsunto(s)
Enfermedades Cutáneas Vasculares , Enfermedades Vasculares , Malformaciones Vasculares , Pruebas Genéticas , Humanos , Proteínas Proto-Oncogénicas c-akt/genética , Enfermedades Cutáneas Vasculares/diagnóstico , Enfermedades Cutáneas Vasculares/genética , Malformaciones Vasculares/diagnóstico , Malformaciones Vasculares/genéticaRESUMEN
CUL3 forms Cullin-Ring ubiquitin ligases (CRL) with Ring-box protein and BTB-adaptor proteins. A variety of BTB-adaptor proteins have been reported to interact with the N-terminus of CUL3, which makes it possible to recognize various substrates for degradation. Regarding the association of CUL3 with neurodevelopmental disorders, a recent study reported three patients with global developmental delay, who carried de novo variants in CUL3. Here, we describe a novel de novo CUL3 variant (c.158G > A, p.Ser53Asn) identified in a patient with global developmental delay, who presented some novel dysmorphic features, including macrocephaly, characteristic facial features, and cutis marmorata. Immunoprecipitation and immunoblot analyses identified significantly weaker binding ability to some BTB proteins in CUL3-S53N compared to wild-type. Interestingly, label-free quantification proteomics analysis of samples immunoprecipitated by CUL3-S53N showed a significantly decreased interaction with some BTB proteins, while almost equal interaction or significantly increased interaction was observed with other BTB proteins. The binding between CUL3 and BTB proteins is essential for CRL substrate recognition, and alteration of their interaction is thought to result in the quantitative alteration in substrate proteins. It is possible that the difference of dysmorphic features between the present case and previously reported cases is caused by the distinctive effect of each CUL3 variant on substrate proteins. The clinical information of the present case will expand the picture of CUL3-related global developmental disorders, and subsequent cell biological analysis of the novel mutation will provide insight into the underlying molecular mechanism of how CUL3 pathogenic variants cause neurological disorders.
Asunto(s)
Proteínas Adaptadoras Transductoras de Señales/metabolismo , Sustitución de Aminoácidos , Dominio BTB-POZ , Proteínas Cullin/genética , Mutación Missense , Trastornos del Neurodesarrollo/genética , Mutación Puntual , Proteínas Adaptadoras Transductoras de Señales/química , Proteínas Cullin/metabolismo , Cara/anomalías , Estudios de Asociación Genética , Heterogeneidad Genética , Células HEK293 , Heterocigoto , Humanos , Recién Nacido , Discapacidad Intelectual/genética , Masculino , Megalencefalia/genética , Fenotipo , Unión Proteica , Mapeo de Interacción de Proteínas , Proteínas Recombinantes/metabolismo , Enfermedades Cutáneas Vasculares/genética , Secuenciación del ExomaRESUMEN
Cell division cycle 42 (CDC42) is a small Rho GTPase, which serves as a fundamental intracellular signal node regulating actin cytoskeletal dynamics and several other integral cellular processes. CDC42-associated disorders encompass a broad clinical spectrum including Takenouchi-Kosaki syndrome, autoinflammatory syndromes and neurodevelopmental phenotypes mimicking RASopathies. Dysregulation of CDC42 signaling by genetic defects in either DOCK6 or ARHGAP31 is also considered to play a role in the pathogenesis of Adams-Oliver syndrome (AOS). Here, we report a mother and her child carrying the previously reported pathogenic CDC42 variant c.511G>A (p.Glu171Lys). Both affected individuals presented with short stature, distinctive craniofacial features, pectus deformity as well as heart and eye anomalies, similar to the recently described Noonan syndrome-like phenotype associated with this variant. Remarkably, one of the patients additionally exhibited aplasia cutis congenita of the scalp. Multi-gene panel sequencing of the known AOS-causative genes and whole exome sequencing revealed no second pathogenic variant in any disease-associated gene explaining the aplasia cutis phenotype in our patient. This observation further expands the phenotypic spectrum of CDC42-associated disorders and underscores the role of CDC42 dysregulation in the pathogenesis of aplasia cutis congenita.
Asunto(s)
Anomalías Múltiples/genética , Displasia Ectodérmica/genética , Mutación Missense , Mutación Puntual , Enfermedades Cutáneas Vasculares/genética , Telangiectasia/congénito , Proteína de Unión al GTP cdc42/deficiencia , Adulto , Sustitución de Aminoácidos , Anomalías Craneofaciales/genética , Enanismo/genética , Anomalías del Ojo/genética , Femenino , Estudios de Asociación Genética , Cardiopatías Congénitas/genética , Humanos , Recién Nacido , Livedo Reticularis , Linaje , Fenotipo , Cuero Cabelludo/patología , Telangiectasia/genética , Proteína de Unión al GTP cdc42/genéticaRESUMEN
Familial cerebral cavernous malformations due to the common Hispanic mutation (FCCM1-CHM) is an endemic condition among the Hispanic population of the Southwestern United States associated with significant morbidity and mortality. Cutaneous vascular malformations (CVMs) can be found in individuals with FCCM1-CHM, but their morphology, prevalence, and association with cerebral cavernous malformations (CCMs) has not been well characterized. A cross-sectional study of 140 individuals with confirmed FCCM1-CHM was performed with statistical analyses of CVM, CCM, and patient characteristics. We then compared these findings to other cohorts with Familial cerebral cavernous malformations (FCCM) due to other mutations. We observed a higher overall prevalence and a different predominant morphological subtype of CVM compared to previous FCCM cohorts. While the number of CVMs was not a reliable indicator of the number of CCMs present, each person with one or more CVMs had evidence of central nervous system (CNS) disease. Awareness of the morphology of these cutaneous lesions can aid in the diagnosis of individuals with FCCM-CHM in Hispanic patients or those with family history of CCM.
Asunto(s)
Hemangioma Cavernoso del Sistema Nervioso Central/genética , Proteína KRIT1/genética , Enfermedades Cutáneas Vasculares/genética , Adolescente , Adulto , Anciano , Niño , Femenino , Hemangioma Cavernoso del Sistema Nervioso Central/diagnóstico por imagen , Hemangioma Cavernoso del Sistema Nervioso Central/patología , Hispánicos o Latinos/genética , Humanos , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Mutación/genética , Linaje , Enfermedades Cutáneas Vasculares/tratamiento farmacológico , Enfermedades Cutáneas Vasculares/patología , Adulto JovenAsunto(s)
Enfermedades Pulmonares Intersticiales/diagnóstico , Proteínas de la Membrana/genética , Enfermedades Cutáneas Vasculares/diagnóstico , Enfermedades Vasculares/diagnóstico , Edad de Inicio , Anemia , Anticuerpos Anticitoplasma de Neutrófilos/inmunología , Anticuerpos Antinucleares/inmunología , Artralgia/tratamiento farmacológico , Artralgia/genética , Artralgia/inmunología , Sedimentación Sanguínea , Bronquiectasia/diagnóstico , Bronquiectasia/tratamiento farmacológico , Bronquiectasia/genética , Bronquiectasia/inmunología , Proteína C-Reactiva/inmunología , Preescolar , Tos , Insuficiencia de Crecimiento , Femenino , Fiebre/tratamiento farmacológico , Fiebre/genética , Fiebre/inmunología , Secuenciación de Nucleótidos de Alto Rendimiento , Humanos , Inmunoglobulina G/inmunología , Inmunosupresores/uso terapéutico , Lactante , Interferón Tipo I , Enfermedades Pulmonares Intersticiales/tratamiento farmacológico , Enfermedades Pulmonares Intersticiales/genética , Enfermedades Pulmonares Intersticiales/inmunología , Nódulos Pulmonares Múltiples/diagnóstico , Nódulos Pulmonares Múltiples/tratamiento farmacológico , Nódulos Pulmonares Múltiples/genética , Nódulos Pulmonares Múltiples/inmunología , Osteoartropatía Hipertrófica Primaria , Análisis de Secuencia de ADN , Proteína Amiloide A Sérica , Enfermedades Cutáneas Vasculares/tratamiento farmacológico , Enfermedades Cutáneas Vasculares/genética , Enfermedades Cutáneas Vasculares/inmunología , Enfermedades Vasculares/tratamiento farmacológico , Enfermedades Vasculares/genética , Enfermedades Vasculares/inmunologíaRESUMEN
OBJECTIVE: Individuals with deficiency of adenosine deaminase 2 (DADA2), a recently recognized autosomal recessive disease, present with various systemic vascular and inflammatory manifestations, often with young age at disease onset or with early onset of recurrent strokes. Their clinical features and histologic findings overlap with those of childhood-onset polyarteritis nodosa (PAN), a primary "idiopathic" systemic vasculitis. Despite similar clinical presentation, individuals with DADA2 may respond better to biologic therapy than to traditional immunosuppression. The aim of this study was to screen an international registry of children with systemic primary vasculitis for variants in ADA2. METHODS: The coding exons of ADA2 were sequenced in 60 children and adolescents with a diagnosis of PAN, cutaneous PAN, or unclassifiable vasculitis (UCV), any chronic vasculitis with onset at age 5 years or younger, or history of stroke. The functional consequences of the identified variants were assessed by ADA2 enzyme assay and immunoblotting. RESULTS: Nine children with DADA2 (5 with PAN, 3 with UCV, and 1 with antineutrophil cytoplasmic antibody-associated vasculitis) were identified. Among them, 1 patient had no rare variants in the coding region of ADA2 and 8 had biallelic, rare variants (minor allele frequency <0.01) with a known association with DADA2 (p.Gly47Arg and p.Gly47Ala) or a novel association (p.Arg9Trp, p.Leu351Gln, and p.Ala357Thr). The clinical phenotype varied widely. CONCLUSION: These findings support previous observations indicating that DADA2 has extensive genotypic and phenotypic variability. Thus, screening ADA2 among children with vasculitic rash, UCV, PAN, or unexplained, early-onset central nervous system disease with systemic inflammation may enable an earlier diagnosis of DADA2.
Asunto(s)
Adenosina Desaminasa/genética , Vasculitis Asociada a Anticuerpos Citoplasmáticos Antineutrófilos/genética , Péptidos y Proteínas de Señalización Intercelular/genética , Poliarteritis Nudosa/genética , Adenosina Desaminasa/deficiencia , Adolescente , Edad de Inicio , Niño , Preescolar , Femenino , Humanos , Lactante , Recién Nacido , Péptidos y Proteínas de Señalización Intercelular/deficiencia , Masculino , Mutación , Enfermedades Cutáneas Vasculares/genética , Vasculitis Sistémica/genéticaAsunto(s)
Hipoplasia Dérmica Focal/diagnóstico , Enfermedades Genéticas Ligadas al Cromosoma X/diagnóstico , Mosaicismo , Enfermedades Cutáneas Vasculares/congénito , Aciltransferasas/genética , Adulto , Biopsia , Análisis Mutacional de ADN , Dermoscopía , Diagnóstico Diferencial , Femenino , Hipoplasia Dérmica Focal/sangre , Hipoplasia Dérmica Focal/genética , Hipoplasia Dérmica Focal/patología , Mutación del Sistema de Lectura , Enfermedades Genéticas Ligadas al Cromosoma X/genética , Enfermedades Genéticas Ligadas al Cromosoma X/patología , Humanos , Proteínas de la Membrana/genética , Piel/diagnóstico por imagen , Piel/patología , Enfermedades Cutáneas Vasculares/diagnóstico , Enfermedades Cutáneas Vasculares/genética , Enfermedades Cutáneas Vasculares/patologíaRESUMEN
A patient with extensive multisystem overgrowth caused by a somatic gain of function PIK3CA-mutation is described. This case is an example of the clinical diversity of the PIK3CA-Related Overgrowth Spectrum (PROS) as the patient had overlapping features of Congenital Lipomatous Overgrowth Vascular malformations Epidermal nevi and Skeletal abnormalities (CLOVES) syndrome and Megalencephaly-Capillary malformation Polymicrogyria (MCAP) syndrome and underlines the utility of this umbrella term.
Asunto(s)
Anomalías Múltiples/diagnóstico , Fosfatidilinositol 3-Quinasa Clase I/genética , Lipoma/diagnóstico , Megalencefalia/diagnóstico , Anomalías Musculoesqueléticas/diagnóstico , Nevo/diagnóstico , Enfermedades Cutáneas Vasculares/diagnóstico , Telangiectasia/congénito , Malformaciones Vasculares/diagnóstico , Anomalías Múltiples/genética , Anomalías Múltiples/terapia , Secuencia de Bases , Broncodilatadores/uso terapéutico , Diagnóstico Diferencial , Nutrición Enteral , Humanos , Inmunosupresores/uso terapéutico , Recién Nacido , Lipoma/genética , Lipoma/terapia , Masculino , Megalencefalia/genética , Megalencefalia/terapia , Anomalías Musculoesqueléticas/genética , Anomalías Musculoesqueléticas/terapia , Mutación , Nevo/genética , Nevo/terapia , Fenotipo , Respiración Artificial/métodos , Sirolimus/uso terapéutico , Enfermedades Cutáneas Vasculares/genética , Enfermedades Cutáneas Vasculares/terapia , Telangiectasia/diagnóstico , Telangiectasia/genética , Telangiectasia/terapia , Malformaciones Vasculares/genética , Malformaciones Vasculares/terapiaAsunto(s)
Malformaciones Arteriovenosas/diagnóstico por imagen , Capilares/anomalías , Mancha Vino de Oporto/diagnóstico por imagen , Diagnóstico Prenatal , Enfermedades Cutáneas Vasculares/diagnóstico por imagen , Adulto , Malformaciones Arteriovenosas/genética , Malformaciones Arteriovenosas/patología , Capilares/diagnóstico por imagen , Capilares/patología , Femenino , Pruebas Genéticas , Humanos , Recién Nacido , Mancha Vino de Oporto/genética , Mancha Vino de Oporto/patología , Embarazo , Enfermedades Cutáneas Vasculares/genética , Enfermedades Cutáneas Vasculares/patologíaRESUMEN
Cutaneous polyarteritis nodosa (CPAN) is characterized by a necrotizing vasculitis of small and medium-sized arteries in the skin, which can be associated with fever, arthralgia, myalgia, and neuropathy, but, unlike polyarteritis nodosa (PAN), there is no visceral involvement. CPAN is rare in childhood. We report two siblings who developed CPAN during childhood. Interestingly, both had Mediterranean fever gene (MEFV) mutation, i.e. heterozygous E148Q. They also shared HLA-A24, -DR15 alleles. Simultaneous occurrence of MEFV mutation and HLA alleles with CPAN has never been reported in Japan. These cases could provide some hereditary clue for the development of CPAN.
Asunto(s)
Antígeno HLA-A24/genética , Poliarteritis Nudosa , Pirina/genética , Enfermedades Cutáneas Vasculares , Tejido Subcutáneo , Alelos , Niño , Femenino , Heterocigoto , Humanos , Japón , Mutación , Poliarteritis Nudosa/diagnóstico , Poliarteritis Nudosa/genética , Poliarteritis Nudosa/fisiopatología , Hermanos , Piel/patología , Enfermedades Cutáneas Vasculares/diagnóstico , Enfermedades Cutáneas Vasculares/genética , Enfermedades Cutáneas Vasculares/fisiopatología , Tejido Subcutáneo/irrigación sanguínea , Tejido Subcutáneo/diagnóstico por imagen , Tejido Subcutáneo/patologíaAsunto(s)
Enfermedades Autoinmunes/genética , Interferón Tipo I/sangre , Enfermedades Pulmonares Intersticiales/genética , Proteínas de la Membrana/genética , Enfermedades Cutáneas Vasculares/genética , Adolescente , Enfermedades Autoinmunes/sangre , Humanos , Enfermedades Pulmonares Intersticiales/sangre , Masculino , Enfermedades Cutáneas Vasculares/sangreAsunto(s)
Factor V/genética , Vasculitis por IgA/genética , Enfermedades Cutáneas Vasculares/genética , Aspirina/administración & dosificación , Azatioprina/administración & dosificación , Biopsia , Preescolar , Humanos , Vasculitis por IgA/diagnóstico , Vasculitis por IgA/tratamiento farmacológico , Vasculitis por IgA/patología , Inmunosupresores/administración & dosificación , Extremidad Inferior , Masculino , Necrosis/tratamiento farmacológico , Necrosis/etiología , Inhibidores de Agregación Plaquetaria/administración & dosificación , Enfermedades Cutáneas Vasculares/tratamiento farmacológico , Enfermedades Cutáneas Vasculares/patologíaRESUMEN
INTRODUCTION: Gardner-Diamond syndrome is a rare condition secondary to a sensitization to self-erythrocytes. It is predominantly seen in women and presents as a painful ecchymotic disorder. An underlying psychiatric disease or a triggering psychological stress is of important diagnostic value. CASE REPORT: We report a 24-year-old patient who presented with intermittent spontaneous painful ecchymosis since 5 years. Complementary investigations failed to identify an organic disorder. Gardner-Diamond syndrome was retained because of the clinical presentation, the negativity of diagnostic work-up and the identification of a psychological trauma. Patient management (pain, psychological support) is difficult, justifying a multidisciplinary approach. CONCLUSION: Gardner-Diamond syndrome is a rare and unrecognized disorder, which should be discussed in the presence of ecchymotic or purpuric lesions that do not have a diagnostic orientation. Early recognition of this disorder enables initiation of an appropriate management, but also limits unnecessary additional explorations.
Asunto(s)
Enfermedades Autoinmunes/diagnóstico , Trastornos Fingidos/diagnóstico , Trastornos Psicóticos/diagnóstico , Enfermedades Cutáneas Vasculares/diagnóstico , Enfermedades Autoinmunes/genética , Enfermedades Autoinmunes/patología , Diagnóstico Diferencial , Trastornos Fingidos/genética , Trastornos Fingidos/patología , Humanos , Masculino , Trastornos Psicóticos/genética , Trastornos Psicóticos/patología , Enfermedades Cutáneas Vasculares/genética , Enfermedades Cutáneas Vasculares/patología , Adulto JovenAsunto(s)
Lipoma/genética , Anomalías Musculoesqueléticas/genética , Mutación Missense/genética , Nevo/genética , Fosfatidilinositol 3-Quinasas/genética , Malformaciones Vasculares/genética , Fosfatidilinositol 3-Quinasa Clase I , Extremidades , Heterocigoto , Humanos , Lipoma/congénito , Mosaicismo , Nevo/congénito , Enfermedades Cutáneas Vasculares/congénito , Enfermedades Cutáneas Vasculares/genéticaRESUMEN
The megalencephaly capillary malformation syndrome (MCAP, OMIM 602501) is known to be associated with mosaic mutations in PIK3CA occurring during embryogenesis. Standard sequencing technologies are relatively poor at indentifying sequence changes that only affect a small percentage of cells, and the mutations are frequently not identified in lymphocyte DNA, with biopsies of the affected tissues often being required to detect mosaic mutations. Such invasive procedures are not always acceptable to parents. We describe the case of a patient in whom we were able to confirm a causative PIK3CA mutation, first found thorugh next-generation sequencing, in several tissue types including a secondary tooth. As part of this work, we were also able to begin validating dental tissue for potential use in genetic testing, as we achieved excellent DNA yields with minimal effort, even from deciduous teeth shed some years earlier.
Asunto(s)
Anomalías Múltiples/genética , Megalencefalia/genética , Fosfatidilinositol 3-Quinasas/genética , Enfermedades Cutáneas Vasculares/genética , Telangiectasia/congénito , Anomalías Múltiples/enzimología , Adolescente , Fosfatidilinositol 3-Quinasa Clase I , ADN/análisis , ADN/genética , Análisis Mutacional de ADN , Pulpa Dental/química , Femenino , Humanos , Megalencefalia/enzimología , Mutación , Enfermedades Cutáneas Vasculares/enzimología , Telangiectasia/enzimología , Telangiectasia/genéticaAsunto(s)
Proteínas Adaptadoras Transductoras de Señales/genética , Proteínas de la Membrana/genética , Mutación , Enfermedades Cutáneas Vasculares/genética , Accidente Cerebrovascular/genética , Telangiectasia/congénito , Educación Médica Continua , Humanos , Lactante , Malformaciones Arteriovenosas Intracraneales/genética , Livedo Reticularis , Masculino , Telangiectasia/genéticaRESUMEN
Key teaching points ⢠SAVI is a recently described interferonopathy resulting from constitutive action of STING and up-regulation of IFN-ß signaling. ⢠SAVI is characterized by facial erythema with telangiectasia, acral/cold-sensitive tissue ulceration and amputations, and interstitial lung disease. It has overlapping features with Aicardi-Goutières syndrome and familial chilblain lupus. ⢠Traditional immunosuppressive medications and biologic therapies appear to be of limited benefit, but JAK inhibitors may impact disease progression.