يعرض 1 - 10 نتائج من 10 نتيجة بحث عن '"Guillermo Guelbert"', وقت الاستعلام: 1.34s تنقيح النتائج
  1. 1
    دورية أكاديمية

    المصدر: Molecular Genetics and Metabolism Reports, Vol 38, Iss , Pp 101060- (2024)

    الوصف: Introduction: Late infantile neuronal ceroid lipofuscinosis type 2 (CLN2), is a neurodegenerative autosomal recessive disease caused by TPP1 gene variants, with a spectrum of classic and atypical phenotypes. The aim of treatment is to slow functional decline as early as possible in an attempt to improve quality of life and survival. This study describes the clinical characteristics as well as the response to treatment with cerliponase alfa. Materials and methods: A retrospective study was conducted in five Latin-American countries, using clinical records from patients with CLN2. Clinical follow-up and treatment variables are described. A descriptive and bivariate statistical analysis was performed. Results: A total of 36 patients were observed (range of follow-up of 61–110 weeks post-treatment). At presentation, patients with the classic phenotype (n = 16) exhibited regression in language (90%), while seizures were the predominant symptom (87%) in patients with the atypical phenotype (n = 20). Median age of symptom onset and time to first specialized consultation was 3 (classical) and 7 (atypical) years, while the median time interval between onset of symptoms and treatment initiation was 4 years (classical) and 7.5 (atypical). The most frequent variant was c.827 A > T in 17/72 alleles, followed by c.622C > T in 6/72 alleles. All patients were treated with cerliponase alfa, and either remained functionally stable or had a loss of 1 point on the CLN2 scale, or up to 2 points on the Wells Cornel and Hamburg scales, when compared to pretreatment values. Discussion and conclusion: This study reports the largest number of patients with CLN2 currently on treatment with cerliponase alfa in the world. Data show a higher frequency of patients with atypical phenotypes and a high allelic proportion of intron variants in our region. There was evidence of long intervals until first specialized consultation, diagnosis, and enzyme replacement therapy. Follow-up after the initiation of cerliponase alfa showed slower progression or stabilization of the disease, associated with adequate clinical outcomes and stable functional scores. These improvements were consistent in both clinical phenotypes.

    وصف الملف: electronic resource

  2. 2
    دورية أكاديمية

    المصدر: Frontiers in Neurology, Vol 13 (2022)

    الوصف: Neuronal ceroid lipofuscinoses (NCLs) comprise 13 hereditary neurodegenerative pathologies of very low frequency that affect individuals of all ages around the world. All NCLs share a set of symptoms that are similar to other diseases. The exhaustive collection of data from diverse sources (clinical, genetic, neurology, ophthalmology, etc.) would allow being able in the future to define this group with greater precision for a more efficient diagnostic and therapeutic approach. Despite the large amount of information worldwide, a detailed study of the characteristics of the NCLs in South America and the Caribbean region (SA&C) has not yet been done. Here, we aim to present and analyse the multidisciplinary evidence from all the SA&C with qualitative weighting and biostatistical evaluation of the casuistry. Seventy-one publications from seven countries were reviewed, and data from 261 individuals (including 44 individuals from the Cordoba cohort) were collected. Each NCL disease, as well as phenotypical and genetic data were described and discussed in the whole group. The CLN2, CLN6, and CLN3 disorders are the most frequent in the region. Eighty-seven percent of the individuals were 10 years old or less at the onset of symptoms. Seizures were the most common symptom, both at onset (51%) and throughout the disease course, followed by language (16%), motor (15%), and visual impairments (11%). Although symptoms were similar in all NCLs, some chronological differences could be observed. Sixty DNA variants were described, ranging from single nucleotide variants to large chromosomal deletions. The diagnostic odyssey was probably substantially decreased after medical education activities promoted by the pharmaceutical industry and parent organizations in some SA&C countries. There is a statistical deviation in the data probably due to the approval of the enzyme replacement therapy for CLN2 disease, which has led to a greater interest among the medical community for the early description of this pathology. As a general conclusion, it became clear in this work that the combined bibliographical/retrospective evaluation approach allowed a general overview of the multidisciplinary components and the epidemiological tendencies of NCLs in the SA&C region.

    وصف الملف: electronic resource

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    دورية أكاديمية

    المصدر: Journal of Inborn Errors of Metabolism and Screening, Vol 10 (2022)

    الوصف: Abstract Neuronal ceroid lipofuscinosis type 2 (CLN2) disease is a rare autosomal recessive neurodegenerative disorder caused by mutations in the CLN2/TPP1 gene, leading to a deficiency in tripeptidyl peptidase 1 activity. Enzyme replacement therapy with cerliponase alfa (recombinant human TPP1 [rhTPP1]; Brineura®) was approved in the United States and Europe for the treatment of CLN2 disease in 2017. We retrospectively report a cohort of 19 patients with CLN2 assisted in a specialized center in Argentina, including 8 newly diagnosed cases. Speech disorders and white matter changes/ventricular system enlargement were the most frequent clinical and imaging findings at CLN2 disease onset, respectively. Patients treated with cerliponase alfa presented a stable or improved course of the disease in this Latin American real world setting, as described in clinical trials.

    وصف الملف: electronic resource

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    دورية أكاديمية

    المصدر: Journal of Inborn Errors of Metabolism and Screening, Vol 9 (2021)

    الوصف: ABSTRACT Neuronal Ceroid Lipofuscinosis (NCL) refers to a group of inherited lysosomal storage disorders characterized by the intracellular accumulation of ceroid-lipofuscin compounds and neurodegeneration. Fourteen genes are currently recognized with disease-causing DNA variants: PPT1/CLN1, TPP1/CLN2, CLN3, DNAJC5/CLN4, CLN5, CLN6, MFSD8/CLN7, CLN8, CTSD/CN10, GRN/CLN11, ATP13A2/CLN12, CTSF/CLN13, KCTD7/CLN14, TBCK/CLN15. In the frame of the Cordoba cohort, we studied N=51 cases. The aim of this paper is the observational and retrospective analysis of the “atypical” phenotypes. PCR-Sanger sequencing and/or massive exome sequencing were used as a screening methodology. One CLN1 subject showed an atypical prolonged (P) phenotype with null PPT1 activity and a heterozygous compound genotype: E5 c.451C>T, p.Arg151*/g.6302T>G (I3 c.363-3T>G). Other 11 CLN2 individuals (except one girl) showed TPP1 activity decreased to around 10% of the minimum value of the reference interval in leukocytes and saliva. The DNA variants E7 c.827A>T, p.Asp276Val and I7 c.887-10A>G were the most prevalent. One CLN8 individual showed an atypical congenital phenotype with a heterozygous combination of DNA variants: E2 c.1A>G, p.?/E3 c.792C>G, p.Asn264Lys. Massive sequencing was installed as a screening methodology for the precision diagnosis of atypical CLN1, CLN2, and CLN8 phenotypes. A genetic/phenotypic local registry is under construction.

    وصف الملف: electronic resource

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    الوصف: Introduction: Late infantile neuronal ceroid lipofuscinosis type 2 (CLN2), is a neurodegenerative autosomal recessive disease caused by TPP1 gene variants, with a spectrum of classic and atypical phenotypes. The aim of treatment is to slow functional decline as early as possible, improving quality of life and survival. This study describes the clinical characteristics as well as response to treatment with cerliponase alfa. Materials and Methods: A retrospective study was conducted in five Latin-American countries, based on clinical records from patients with CLN2. Clinical follow-up and treatment variables are described. A descriptive and bivariate statistical analysis was performed. Results: A total of 36 patients are reported with a mean age of symptom onset and time to first specialized consultation of 4.7±2.3 and 6±3.1 years, respectively. Seizures were the predominant symptom (80.6%). In a subgroup analysis, most patients with the classic phenotype exhibited regression in language (90%), while the patients with the atypical phenotype had seizures as the predominant symptom (87%). The mean age of symptom onset and time to first specialized consultation was 3.5±2.0 and 4.9±3.2 years, respectively, in patients with the classic phenotype and 6.2±1.8 and 7.5±2.4 in patients with the atypical phenotype. The mean time interval between onset of symptoms and treatment initiation was 3.8 years in patients with classic phenotype and 7.4 in patients with atypical phenotype. All patients were treated with cerliponase alfa, maintaining overall functional stability as compared to pretreatment values. Discussion and conclusion: This study reports at this time the largest number of patients with CLN2 in treatment with cerliponase alfa in the world. Data show a higher frequency of patients with atypical phenotype and a high allelic proportion of intron variants in our region. There was evidence of long intervals until first specialized consultation, diagnosis, and enzyme replacement therapy. Follow-up after the initiation of cerliponase alfa showed slower-to-no-progression of the disease, associated with adequate clinical outcomes and stable functional scores. These improvements were consistent in both clinical phenotypes.

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    صورة

    الوصف: Neuronal ceroid lipofuscinoses (NCLs) comprise 13 hereditary neurodegenerative pathologies of very low frequency that affect individuals of all ages around the world. All NCLs share a set of symptoms that are similar to other diseases. The exhaustive collection of data from diverse sources (clinical, genetic, neurology, ophthalmology, etc.) would allow being able in the future to define this group with greater precision for a more efficient diagnostic and therapeutic approach. Despite the large amount of information worldwide, a detailed study of the characteristics of the NCLs in South America and the Caribbean region (SA&C) has not yet been done. Here, we aim to present and analyse the multidisciplinary evidence from all the SA&C with qualitative weighting and biostatistical evaluation of the casuistry. Seventy-one publications from seven countries were reviewed, and data from 261 individuals (including 44 individuals from the Cordoba cohort) were collected. Each NCL disease, as well as phenotypical and genetic data were described and discussed in the whole group. The CLN2, CLN6, and CLN3 disorders are the most frequent in the region. Eighty-seven percent of the individuals were 10 years old or less at the onset of symptoms. Seizures were the most common symptom, both at onset (51%) and throughout the disease course, followed by language (16%), motor (15%), and visual impairments (11%). Although symptoms were similar in all NCLs, some chronological differences could be observed. Sixty DNA variants were described, ranging from single nucleotide variants to large chromosomal deletions. The diagnostic odyssey was probably substantially decreased after medical education activities promoted by the pharmaceutical industry and parent organizations in some SA&C countries. There is a statistical deviation in the data probably due to the approval of the enzyme replacement therapy for CLN2 disease, which has led to a greater interest among the medical community for the early description of this pathology. As ...

  7. 7

    الوصف: Neuronal ceroid lipofuscinoses (NCLs) comprise 13 hereditary neurodegenerative pathologies of very low frequency that affect individuals of all ages around the world. All NCLs share a set of symptoms that are similar to other diseases. The exhaustive collection of data from diverse sources (clinical, genetic, neurology, ophthalmology, etc.) would allow being able in the future to define this group with greater precision for a more efficient diagnostic and therapeutic approach. Despite the large amount of information worldwide, a detailed study of the characteristics of the NCLs in South America and the Caribbean region (SA&C) has not yet been done. Here, we aim to present and analyse the multidisciplinary evidence from all the SA&C with qualitative weighting and biostatistical evaluation of the casuistry. Seventy-one publications from seven countries were reviewed, and data from 261 individuals (including 44 individuals from the Cordoba cohort) were collected. Each NCL disease, as well as phenotypical and genetic data were described and discussed in the whole group. The CLN2, CLN6, and CLN3 disorders are the most frequent in the region. Eighty-seven percent of the individuals were 10 years old or less at the onset of symptoms. Seizures were the most common symptom, both at onset (51%) and throughout the disease course, followed by language (16%), motor (15%), and visual impairments (11%). Although symptoms were similar in all NCLs, some chronological differences could be observed. Sixty DNA variants were described, ranging from single nucleotide variants to large chromosomal deletions. The diagnostic odyssey was probably substantially decreased after medical education activities promoted by the pharmaceutical industry and parent organizations in some SA&C countries. There is a statistical deviation in the data probably due to the approval of the enzyme replacement therapy for CLN2 disease, which has led to a greater interest among the medical community for the early description of this pathology. As ...

  8. 8

    الوصف: Neuronal ceroid lipofuscinoses (NCLs) comprise 13 hereditary neurodegenerative pathologies of very low frequency that affect individuals of all ages around the world. All NCLs share a set of symptoms that are similar to other diseases. The exhaustive collection of data from diverse sources (clinical, genetic, neurology, ophthalmology, etc.) would allow being able in the future to define this group with greater precision for a more efficient diagnostic and therapeutic approach. Despite the large amount of information worldwide, a detailed study of the characteristics of the NCLs in South America and the Caribbean region (SA&C) has not yet been done. Here, we aim to present and analyse the multidisciplinary evidence from all the SA&C with qualitative weighting and biostatistical evaluation of the casuistry. Seventy-one publications from seven countries were reviewed, and data from 261 individuals (including 44 individuals from the Cordoba cohort) were collected. Each NCL disease, as well as phenotypical and genetic data were described and discussed in the whole group. The CLN2, CLN6, and CLN3 disorders are the most frequent in the region. Eighty-seven percent of the individuals were 10 years old or less at the onset of symptoms. Seizures were the most common symptom, both at onset (51%) and throughout the disease course, followed by language (16%), motor (15%), and visual impairments (11%). Although symptoms were similar in all NCLs, some chronological differences could be observed. Sixty DNA variants were described, ranging from single nucleotide variants to large chromosomal deletions. The diagnostic odyssey was probably substantially decreased after medical education activities promoted by the pharmaceutical industry and parent organizations in some SA&C countries. There is a statistical deviation in the data probably due to the approval of the enzyme replacement therapy for CLN2 disease, which has led to a greater interest among the medical community for the early description of this pathology. As ...

  9. 9

    المصدر: Journal of Inborn Errors of Metabolism and Screening v.9 2021
    Journal of Inborn Errors of Metabolism and Screening
    Instituto Genética para Todos (IGPT)
    instacron:IGPT
    Repositorio Digital Universitario (UNC)
    Universidad Nacional de Córdoba
    instacron:UNC
    Journal of Inborn Errors of Metabolism and Screening, Volume: 9, Article number: e20210009, Published: 05 MAY 2021
    Journal of Inborn Errors of Metabolism and Screening, Vol 9 (2021)

    الوصف: Neuronal Ceroid Lipofuscinosis (NCL) refers to a group of inherited lysosomal storage disorders characterized by the intracellular accumulation of ceroid-lipofuscin compounds and neurodegeneration. Fourteen genes are currently recognized with disease-causing DNA variants: PPT1/CLN1, TPP1/CLN2, CLN3, DNAJC5/CLN4, CLN5, CLN6, MFSD8/CLN7, CLN8, CTSD/CN10, GRN/CLN11, ATP13A2/CLN12, CTSF/CLN13, KCTD7/CLN14, TBCK/CLN15. In the frame of the Cordoba cohort, we studied N=51 cases. The aim of this paper is the observational and retrospective analysis of the “atypical” phenotypes. PCR-Sanger sequencing and/or massive exome sequencing were used as a screening methodology. One CLN1 subject showed an atypical prolonged (P) phenotype with null PPT1 activity and a heterozygous compound genotype: E5 c.451C>T, p.Arg151*/g.6302T>G (I3 c.363-3T>G). Other 11 CLN2 individuals (except one girl) showed TPP1 activity decreased to around 10% of the minimum value of the reference interval in leukocytes and saliva. The DNA variants E7 c.827A>T, p.Asp276Val and I7 c.887-10A>G were the most prevalent. One CLN8 individual showed an atypical congenital phenotype with a heterozygous combination of DNA variants: E2 c.1A>G, p.?/E3 c.792C>G, p.Asn264Lys. Massive sequencing was installed as a screening methodology for the precision diagnosis of atypical CLN1, CLN2, and CLN8 phenotypes. A genetic/phenotypic local registry is under construction. publishedVersion Fil: Pesaola, Favio. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación en Ciencias de la Salud; Argentina. Fil: Pesaola, Favio. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas; Argentina. Fil: Pesaola, Favio. Hospital de Niños de la Provincia de Córdoba. Programa de Investigación Traslacional de Lipofuscinosis Ceroideas Neuronales; Argentina. Fil: Guelbert, Guillermo. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas; Argentina. Fil: Guelbert, Guillermo. Hospital de Niños de la Provincia de Córdoba. Programa de Investigación Traslacional de Lipofuscinosis Ceroideas Neuronales; Argentina. Fil: Guelbert, Guillermo. Hospital de Niños de la Provincia de Córdoba. Sección de Enfermedades Metabólicas Hereditarias; Argentina. Fil: Venier, Ana Clara. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina. Fil: Venier, Ana Clara. Hospital de Niños de la Provincia de Córdoba. Programa de Investigación Traslacional de Lipofuscinosis Ceroideas Neuronales; Argentina. Fil: Venier, Ana Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación en Ciencias de la Salud; Argentina. Fil: Cismondi, Inés Adriana. Universidad Nacional de Córdoba. Facultad de Odontología; Argentina. Fil: Cismondi, Inés Adriana. Hospital de Niños de la Provincia de Córdoba. Programa de Investigación Traslacional de Lipofuscinosis Ceroideas Neuronales; Argentina. Fil: Becerra, Adriana. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas; Argentina. Fil: Beccera, Adriana. Hospital de Niños de la Provincia de Córdoba. Programa de Investigación Traslacional de Lipofuscinosis Ceroideas Neuronales; Argentina. Fil: Becerra, Adriana. Hospital de Niños de la Provincia de Córdoba. Sección de Enfermedades Metabólicas Hereditarias; Argentina. Fil: Vazquez, Juan Carlos G. Universidad Católica de Córdoba; Argentina. Fil: Vazquez, Juan Carlos G. Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigación y Desarrollo en Inmunología y Enfermedades Infecciosas; Argentina. Fil: Fernández, Elmer. Universidad Católica de Córdoba; Argentina. Fil: Fernández, Elmer. Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigación y Desarrollo en Inmunología y Enfermedades Infecciosas; Argentina. Fil: De Paul, Ana Lucia. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas. Centro de Microscopía Electrónica; Argentina. Fil: De Paul, Ana Lucia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación en Ciencias de la Salud; Argentina. Fil: Guelbert, Norberto. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas; Argentina. Fil: Guelbert, Norberto. Hospital de Niños de la Provincia de Córdoba. Programa de Investigación Traslacional de Lipofuscinosis Ceroideas Neuronales; Argentina. Fil: Guelbert, Norberto. Clínica Universitaria Reina Fabiola; Argentina. Fil: Noher, Inés. Fil: Venier, Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina. Fil: Noher, Inés. Hospital de Niños de la Provincia de Córdoba. Programa de Investigación Traslacional de Lipofuscinosis Ceroideas Neuronales; Argentina.

    وصف الملف: text/html; application/pdf

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