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Guevara-Fujita ML, Huaman-Dianderas F, Obispo D, Sánchez R, Barrenechea V, Rojas-Málaga D, Estrada-Cuzcano A, Trubnykova M, Cornejo-Olivas M, Marca V, Gallardo B, Dueñas-Roque M, Protzel A, Castañeda C, Abarca H, Celis L, La Serna-Infantes J, Fujita R. MLPA followed by target-NGS to detect mutations in the dystrophin gene of Peruvian patients suspected of DMD/DMB. Mol Genet Genomic Med 2021; 9:e1759. [PMID: 34327855 PMCID: PMC8457708 DOI: 10.1002/mgg3.1759] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 05/09/2021] [Accepted: 07/08/2021] [Indexed: 11/11/2022] Open
Abstract
Background We report the molecular analysis of the DMD gene in a group of Peruvian patients with Duchenne/Becker dystrophinopathy. This is the first study to thoroughly characterize mutations in this population. Methods We used the combination of multiplex ligation‐dependent probe amplification (MLPA) and sequencing analysis of the DMD gene. We recruited Peruvian patients in 2 years from reference national hospitals. We performed DNA tests in 152 patients, checking first exon deletion/duplication by MLPA, and subsequently, if negative, samples were sequenced to detect point mutations. Results The average age for diagnosis was 9.8 years, suggesting a delay for timely diagnosis and care. We found causal DMD mutations in 125 patients: 72 (57.6%) exon deletions/duplications (41.6% deletions, 16.0% duplications), and 53 (42.4%) point mutations (27.2% nonsense, 9.6% small indels, and 5.6% splice site). Conclusion Due to our genetic background, we expected a higher number of novel and recurrent causal mutations in our sample. Results showed 16% of novel mutations, similar to other well‐studied populations.
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Affiliation(s)
- María Luisa Guevara-Fujita
- Centro de Genética y Biología Molecular, Instituto de Investigación, Facultad de Medicina Humana, Universidad de San Martín de Porres, Lima, Peru
| | - Francia Huaman-Dianderas
- Centro de Genética y Biología Molecular, Instituto de Investigación, Facultad de Medicina Humana, Universidad de San Martín de Porres, Lima, Peru
| | - Daisy Obispo
- Centro de Genética y Biología Molecular, Instituto de Investigación, Facultad de Medicina Humana, Universidad de San Martín de Porres, Lima, Peru
| | - Rodrigo Sánchez
- Centro de Genética y Biología Molecular, Instituto de Investigación, Facultad de Medicina Humana, Universidad de San Martín de Porres, Lima, Peru
| | - Victor Barrenechea
- Centro de Genética y Biología Molecular, Instituto de Investigación, Facultad de Medicina Humana, Universidad de San Martín de Porres, Lima, Peru
| | - Diana Rojas-Málaga
- Centro de Genética y Biología Molecular, Instituto de Investigación, Facultad de Medicina Humana, Universidad de San Martín de Porres, Lima, Peru.,Laboratório de Genética Molecular, Serviço de Genética Médica, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Brazil
| | - Alejandro Estrada-Cuzcano
- Centro de Genética y Biología Molecular, Instituto de Investigación, Facultad de Medicina Humana, Universidad de San Martín de Porres, Lima, Peru.,Paris-Saclay Institute of Neuroscience, CERTO-Retina France, CNRS, Université Paris-Saclay, Orsay, 91405, France
| | - Milana Trubnykova
- Servicio de Genética y Errores Innatos del Metabolismo del Instituto Nacional de Salud del Niño, Lima, Peru
| | - Mario Cornejo-Olivas
- Neurogenetics Research Center, Instituto Nacional de Ciencias Neurológicas, Lima, Peru.,Center for Global Health, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Victoria Marca
- Neurogenetics Research Center, Instituto Nacional de Ciencias Neurológicas, Lima, Peru
| | - Bertha Gallardo
- Servicio de Genética y Errores Innatos del Metabolismo del Instituto Nacional de Salud del Niño, Lima, Peru
| | | | - Ana Protzel
- Hospital Nacional Edgardo Rebagliati Martins, EsSalud, Lima, Peru
| | | | - Hugo Abarca
- Servicio de Genética y Errores Innatos del Metabolismo del Instituto Nacional de Salud del Niño, Lima, Peru
| | - Luis Celis
- Servicio de Genética, Instituto de Salud del Niño San Borja, Lima, Peru
| | | | - Ricardo Fujita
- Centro de Genética y Biología Molecular, Instituto de Investigación, Facultad de Medicina Humana, Universidad de San Martín de Porres, Lima, Peru
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Della Valle A, Rossi BM, Palmero EI, Antelo M, Vaccaro CA, López-Kostner F, Alvarez K, Cruz-Correa M, Bruno LI, Forones NM, Mindiola JAR, Buleje J, Spirandelli F, Bohorquez M, Cock-Rada AM, Sullcahuaman Y, Nascimento I, Abe-Sandes K, Lino-Silva LS, Petracchi F, Mampel A, Rodriguez Y, Rossi NT, Yañez CB, Rubio C, Petta-Lajus TB, Silveira-Lucas EL, Jiménez G, Peña CMM, Reyes-Silva C, Ayala-Madrigal MDLL, del Monte JS, Quispe R, Recalde A, Neffa F, Sarroca C, de Campos Reis Galvão H, Golubicki M, Piñero TA, Kalfayan PG, Ferro FA, Gonzalez ML, Pérez-Mayoral J, Pimenta CAM, Uyaban SPB, Protzel A, Chávez G, Dueñas M, Gil MLG, Spirandelli E, Chialina S, Echeverry M, Fuenmayor LJP, Torres M, Palma TF, Héritas NC, Martin C, Suárez A, Vallejo M, Rafaela de Souza Timoteo A, Ayala CA, Jaramillo-Koupermann G, Hernández-Sandoval JA, Guerrero AH, Dominguez-Barrera C, Bazo-Alvarez JC, Wernhoff P, Plazzer JP, Balavarca Y, Hovig E, Møller P, Dominguez-Valentin M. A snapshot of current genetic testing practice in Lynch syndrome: The results of a representative survey of 33 Latin American existing centres/registries. Eur J Cancer 2019; 119:112-121. [DOI: 10.1016/j.ejca.2019.07.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 07/10/2019] [Accepted: 07/16/2019] [Indexed: 01/05/2023]
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Aquino R, Protzel A, Rivera J, Abarca H, Dueñas M, Nestarez C, Purizaga N, Diringer B. [Frequency of the most common mutations of the CFTR gene in peruvian patients with cystic fibrosis using the ARMS-PCR technique]. Rev Peru Med Exp Salud Publica 2017; 34:62-69. [PMID: 28538847 DOI: 10.17843/rpmesp.2017.341.2767] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 02/08/2017] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVES. To determine the frequency of the ten most common mutations of the CFTR gene reported in Latin Americausing amplification-refractory mutation system-polymerase chain reaction (ARMS-PCR) in patients with cystic fibrosis (CF) in two referral hospitals in Peru during the year 2014. MATERIALS AND METHODS. The frequency of the ten most common mutations of the CFTR gene was assessed in patients of the Hospital Nacional Edgardo Rebagliati Martins and the Instituto Nacional de Salud del Niño, both located in Lima, Peru. Blood samples were collected from 36 patients with CF, and the ARMS-PCR technique was used to determine the presence of these mutations. RESULTS. The study group included 73.5% of patients with a known diagnosis of CF in the country when the study was carried out. ARMS-PCR allowed three of the mutations to be identified in a combined 30.6% of the alleles from patients with CF, and 64.9% of the mutated alleles were not identified. The mutations found were p.Phe508del (22,2%), p.Gly542* (6,9%), and p.Arg1162* (1,4%). CONCLUSIONS. There is significant variability in both the frequency and type of mutations present in our study population and in what has been reported in other Latin American countries. It is necessary to perform studies that use complete sequencing technology for the CFTR gene to identify other mutations present in our population.
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Affiliation(s)
- Ruth Aquino
- Universidad Nacional de Tumbes. Tumbes, Perú.,Empresa de Investigación y Capacitación en Biotecnología Inca'Biotec. Tumbes, Perú
| | - Ana Protzel
- Hospital Nacional Edgardo Rebagliati Martins. Lima, Perú
| | - Juan Rivera
- Instituto Nacional de Salud del Niño. Lima, Perú
| | - Hugo Abarca
- Instituto Nacional de Salud del Niño. Lima, Perú
| | | | | | | | - Benoit Diringer
- Empresa de Investigación y Capacitación en Biotecnología Inca'Biotec. Tumbes, Perú
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Wiebe B, Pohlmann U, Ehlen M, Bartmann P, Protzel A, v Deimling U. Septische Coxitis als seltene Manifestationsform einer neonatalen Infektion mit hämolysierenden Streptokokken der Gruppe B. Z Geburtshilfe Neonatol 2005. [DOI: 10.1055/s-2005-871502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Chen JJ, Chen YJ, Rice G, Teuschler LK, Hamernik K, Protzel A, Kodell RL. Using dose addition to estimate cumulative risks from exposures to multiple chemicals. Regul Toxicol Pharmacol 2001; 34:35-41. [PMID: 11502154 DOI: 10.1006/rtph.2001.1485] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The Food Quality Protection Act (FQPA) of 1996 requires the EPA to consider the cumulative risk from exposure to multiple chemicals that have a common mechanism of toxicity. Three methods, hazard index (HI), point-of-departure index (PODI), and toxicity equivalence factor (TEF), have commonly been considered to estimate the cumulative risk. These methods are based on estimates of ED(10) (point of departure) and reference doses from the dose-response functions of individual chemicals. They do not incorporate the actual dose-response function of the mixture from multiple chemical exposures. Dose addition is considered to be an appropriate approach to cumulative risk assessment because it assumes that the chemicals of interest act in accordance with a common mode of action (a similar action). This paper proposes a formal statistical procedure to estimate the cumulative risk by fitting the dose-response model of the mixture under dose addition. The relative potency between two chemicals is estimated directly from the joint dose response model of the mixture. An example data set of four drugs representing four chemicals is used to illustrate the proposed procedure and compare it to the HI, PODI, and TEF methods.
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Affiliation(s)
- J J Chen
- Division of Biometry and Risk Assessment, National Center for Toxicological Research, US Food and Drug Administration, Jefferson, Arkansas 72079, USA
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Schmitz A, Pförtner J, Protzel A, Harbrecht U. [Incidence of thrombophilic factor V Leiden and prothrombin G20210A mutation in Perthes disease--a pilot study]. Z Orthop Ihre Grenzgeb 2001; 139:143-6. [PMID: 11386104 DOI: 10.1055/s-2001-15046] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
AIM Thrombophilic mutations may play a role in the pathogenesis of the juvenile osteonecrosis of the femoral head, Perthes' disease. We investigated whether children with Perthes' disease have an increased incidence of mutations of factor V (Leiden) and prothrombin (G2O210A), which predispose to thrombosis. METHODS For this pilot study, we analysed the data of twenty consecutive children (16 boys, 4 girls, mean age at diagnosis 6.4 years). According to Catterall's classification of severity, 2 children were in group 1, 7 in group 2, 8 in group 3, and 3 were in the most severe group 4. Mutations of factor V and prothrombin were identified in EDTA-blood by PCR amplification, digestion with restriction enzymes, and gel electrophoresis. RESULTS Heterozygoty for the factor V mutation was detected in two children, for the prothrombin mutation in one child. Both results did not differ significantly from the incidence in Germany, which is 0.05 for factor V mutations and 0.04 for prothrombin mutations. CONCLUSIONS For the presented group of children with Perthes' disease, we did not find an increased rate of factor V or prothrombin mutations compared to the natural incidence. In accordance to other recent studies, our results do not support a link between inherited thrombophilic mutations and Perthes' disease.
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Affiliation(s)
- A Schmitz
- Klinik und Poliklinik für Orthopädie, Rheinischen Friedrich-Wilhelms-Universität Bonn.
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Dearfield KL, McCarroll NE, Protzel A, Stack HF, Jackson MA, Waters MD. A survey of EPA/OPP and open literature on selected pesticide chemicals. II. Mutagenicity and carcinogenicity of selected chloroacetanilides and related compounds. Mutat Res 1999; 443:183-221. [PMID: 10415440 DOI: 10.1016/s1383-5742(99)00019-8] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
With this effort, we continue our examination of data on selected pesticide chemicals and their related analogues that have been presented to the U.S. Environmental Protection Agency's (USEPA's) Office of Pesticide Programs (OPP). This report focuses on a group of selected chloroacetanilides and a few related compounds. As part of the registration process for pesticidal chemicals, interested parties (registrants) must submit toxicity information to support the registration including both mutagenicity and carcinogenicity data. Although this information is available to the public via Freedom of Information (FOI) requests to the OPP, publication in the scientific literature allows greater dissemination and examination of the data. For this Special Issue, graphic profiles have been prepared of the mutagenicity and carcinogenicity data available in the submissions to OPP. Also, a discussion is presented about how toxicity data are used to help establish tolerances (limits of pesticide residues in foods). The mutagenicity results submitted by registrants are supplemented by data on these chemicals from the open literature to provide a full perspective of their genetic toxicology. The group of chloroacetanilides reviewed here display a consistent pattern of mutagenic activity, probably mediated via metabolites. This mutagenic activity is a mechanistically plausible factor in the development of tumors seen in experimental animals exposed to this class of chemicals.
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Affiliation(s)
- K L Dearfield
- U.S. Environmental Protection Agency, Office of Research and Development (8103R), Washington, DC 20460, USA
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Morris AJ, Slabaugh RC, Protzel A. Size characteristics of nascent globin chains (peptidyl tRNA) in the reticulocyte. Ann N Y Acad Sci 1974; 241:310-21. [PMID: 4530661 DOI: 10.1111/j.1749-6632.1974.tb21889.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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9
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Protzel A, Morris AJ. Gel chromatographic analysis of nascent globin chains. Evidence of nonuniform size distribution. J Biol Chem 1974; 249:4594-600. [PMID: 4843145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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10
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Protzel A, Morris AJ. Nascent globin chains from rabbit reticulocyte ribosomes. Accumulation of the completed alpha chain. J Biol Chem 1973; 248:7438-44. [PMID: 4745775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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