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Yamazaki-Nakashimada MA, Roldán-Marín R, Toussaint-Caire S, Olaya-Vargas A, Ramírez-Uribe N, Rivas-Larrauri F, Durán-McKinster C, Alcántara-Ortigoza MA, González-Del Angel A, Orozco-Covarrubias L, Scheffler-Mendoza S, Saez-de-Ocariz M. Hair pigment distribution changes after haematopoietic stem cell transplantation in Griscelli syndrome type 2. J Eur Acad Dermatol Venereol 2020; 35:e53-e56. [PMID: 32594618 DOI: 10.1111/jdv.16795] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
| | - R Roldán-Marín
- Dermato-Oncology Clinic, Faculty of Medicine at the Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - S Toussaint-Caire
- Dermatopathology Department, Dermatology Division at the Hospital General 'Dr. Manuel Gea González', Mexico City, Mexico
| | - A Olaya-Vargas
- Transplant Department, Instituto Nacional de Pediatría, Mexico City, Mexico
| | - N Ramírez-Uribe
- Transplant Department, Instituto Nacional de Pediatría, Mexico City, Mexico
| | - F Rivas-Larrauri
- Immunology Department, Instituto Nacional de Pediatría, Mexico City, Mexico
| | - C Durán-McKinster
- Dermatology Department, Instituto Nacional de Pediatría, Mexico City, Mexico
| | - M A Alcántara-Ortigoza
- Molecular Biology Laboratory at the Instituto Nacional de Pediatría, Mexico City, Mexico
| | - A González-Del Angel
- Molecular Biology Laboratory at the Instituto Nacional de Pediatría, Mexico City, Mexico
| | | | | | - M Saez-de-Ocariz
- Dermatology Department, Instituto Nacional de Pediatría, Mexico City, Mexico
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Salas-Labadía C, Gómez-Carmona S, Cruz-Alcívar R, Martínez-Anaya D, Del Castillo-Ruiz V, Durán-McKinster C, Ulloa-Avilés V, Yokoyama-Rebollar E, Ruiz-Herrera A, Navarrete-Meneses P, Lieberman-Hernández E, González-Del Angel A, Cervantes-Barragán D, Villarroel-Cortés C, Reyes-León A, Suárez-Pérez D, Pedraza-Meléndez A, González-Orsuna A, Pérez-Vera P. Genetic and clinical characterization of 73 Pigmentary Mosaicism patients: revealing the genetic basis of clinical manifestations. Orphanet J Rare Dis 2019; 14:259. [PMID: 31730496 PMCID: PMC6858688 DOI: 10.1186/s13023-019-1208-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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: 03/05/2019] [Accepted: 09/24/2019] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Pigmentary mosaicism constitutes a heterogeneous group of skin pigmentation alterations associated with multisystem involvement. The aim of this study was to establish a complete cytogenetic and molecular characterization of PM patients, emphasizing on searching for possible low chromosomal mosaicism and on establishing an accurate genotype-phenotype correlation. RESULTS A total of 73 patients were included (3 months to 18 years of age), 52% male and 48% female. Observed in 69 (95%) patients, the most frequent pattern of pigmentation was fine and whorled BL, which was associated with disseminated skin extent in 41 (59%) patients. Central nervous system (84%) alterations were the most frequent observed in the group of patients, followed by the musculoskeletal (53%) and ophthalmologic (27%) alterations. Considering the pattern of pigmentation, no significant differences in association with skin extent or extracutaneous manifestations were detected. Following a strict cytogenetic analysis strategy, screening metaphases from three different tissues (peripheral blood, hyperpigmented and hypopigmented skin) we found that 23/73 patients had chromosomal abnormalities classified as follows: 1) Mosaic with 2 or more different cell lines with structural alterations n = 19; 2) Polyploidy (mosaic) n = 1 and 3) Alterations in all cells in three different tissues n = 3. SNP array, array CGH and FISH were useful for the complete characterization of the chromosomal aberrations, for the detection of microdeletions in patients with normal karyotype but with strong clinical suspicious of chromosomal alteration, and for a better establishment of genotype-phenotype correlation. In 2 patients we found genes associated with some of the extracutaneous manifestations (SHH, MNX1, PPP2R2C). CONCLUSIONS This group of 73 patients finely described is the largest series of patients with pigmentary mosaicism reported worldwide. As we showed in this study, the followed analysis strategy allowed the detection of cytogenetic and molecular abnormalities, and made possible the establishment of genotype-phenotype associations in some patients. An important limitation of our study was the analysis of fibroblasts cultures instead of melanocytes and keratinocytes. In some cases the direct molecular DNA analysis of skin biopsy could be another choice.
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Affiliation(s)
- C Salas-Labadía
- Laboratorio de Genética y Cáncer, Departamento de Genética Humana, Instituto Nacional de Pediatría, 04530, Ciudad de México, Mexico.
| | - S Gómez-Carmona
- Departamento de Genética Médica, Centro de Rehabilitación e Inclusión Infantil Teletón, Tuxtla Gutiérrez, Chiapas, Mexico.,Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, Mexico
| | - R Cruz-Alcívar
- Laboratorio de Genética y Cáncer, Departamento de Genética Humana, Instituto Nacional de Pediatría, 04530, Ciudad de México, Mexico.,Laboratorio de Citogenética, Genos Médica, Centro Especializado en Genética, Ciudad de México, Mexico.,Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - D Martínez-Anaya
- Laboratorio de Genética y Cáncer, Departamento de Genética Humana, Instituto Nacional de Pediatría, 04530, Ciudad de México, Mexico
| | - V Del Castillo-Ruiz
- Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, Mexico
| | - C Durán-McKinster
- Departamento de Dermatología, Instituto Nacional de Pediatría, Ciudad de México, Mexico
| | - V Ulloa-Avilés
- Laboratorio de Genética y Cáncer, Departamento de Genética Humana, Instituto Nacional de Pediatría, 04530, Ciudad de México, Mexico
| | - E Yokoyama-Rebollar
- Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, Mexico
| | - A Ruiz-Herrera
- Hospital de Especialidades Pediátrico de León, León, Guanajuato, Mexico
| | - P Navarrete-Meneses
- Laboratorio de Genética y Cáncer, Departamento de Genética Humana, Instituto Nacional de Pediatría, 04530, Ciudad de México, Mexico
| | - E Lieberman-Hernández
- Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, Mexico
| | - A González-Del Angel
- Laboratorio de Biología Molecular, Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, Mexico
| | | | - C Villarroel-Cortés
- Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, Mexico
| | - A Reyes-León
- Laboratorio de Genética y Cáncer, Departamento de Genética Humana, Instituto Nacional de Pediatría, 04530, Ciudad de México, Mexico
| | - D Suárez-Pérez
- Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, Mexico
| | - A Pedraza-Meléndez
- Laboratorio de Genética y Cáncer, Departamento de Genética Humana, Instituto Nacional de Pediatría, 04530, Ciudad de México, Mexico.,Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - A González-Orsuna
- Laboratorio de Genética y Cáncer, Departamento de Genética Humana, Instituto Nacional de Pediatría, 04530, Ciudad de México, Mexico
| | - P Pérez-Vera
- Laboratorio de Genética y Cáncer, Departamento de Genética Humana, Instituto Nacional de Pediatría, 04530, Ciudad de México, Mexico.
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Velázquez-Aragón JA, Alcántara-Ortigoza MA, Estandia-Ortega B, Reyna-Fabián ME, Méndez-Adame CD, González-Del Angel A. Gene Interactions Provide Evidence for Signaling Pathways Involved in Cleft Lip/Palate in Humans. J Dent Res 2016; 95:1257-64. [PMID: 27154735 DOI: 10.1177/0022034516647034] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Nonsyndromic cleft lip with or without cleft palate (NSCL/P) is a common craniofacial birth defect that has a complex etiology. Genome-wide association studies have recently identified new loci associated with NSCL/P, but these loci have not been analyzed in a Mexican Mestizo population. A complex etiology implies the presence of genetic interactions, but there is little available information regarding this in NSCL/P, and no signaling pathway has been clearly implicated in humans. Here, we analyzed the associations of 24 single nucleotide polymorphisms (SNPs) with NSCL/P in a Mexican Mestizo population (133 cases, 263 controls). The multifactorial dimensionality reduction method was used to examine gene-gene and gene-folic acid consumption interactions for the 24 SNPs analyzed in this study and for 2 additional SNPs that had previously been genotyped in the same study population. Six SNPs located in paired box 7, ventral anterior homeobox 1, sprouty RTK signaling antagonist 2, bone morphogenetic protein 4, and tropomyosin 1 genes were associated with higher risks of NSCL/P (P = 0.0001 to 0.04); 2 SNPs, 1 each in netrin 1 and V-maf avian musculoaponeurotic fibrosarcoma oncogene homolog B, were associated with a lower risk of NSCL/P (P = 0.013 to 0.03); and 2 SNPs, 1 each in ATP binding cassette subfamily A member 4 (ABCA4) and noggin, showed associations with NSCL/P that approached the threshold of significance (P = 0.056 to 0.07). In addition, 6 gene-gene interactions (P = 0.0001 to 0.001) and an ABCA4-folic acid consumption interaction (P < 0.0001) were identified. On the basis of these results, combined with those of previous association studies in the literature and biological characterizations of murine models, we propose an interaction network in which interferon regulatory factor 6 plays a central role in the etiology of NSCL/P.
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Affiliation(s)
- J A Velázquez-Aragón
- Laboratorio de Biología Molecular, Departamento de Genética Humana, Instituto Nacional de Pediatría, Secretaría de Salud, Coyoacán, Distrito Federal, México
| | - M A Alcántara-Ortigoza
- Laboratorio de Biología Molecular, Departamento de Genética Humana, Instituto Nacional de Pediatría, Secretaría de Salud, Coyoacán, Distrito Federal, México
| | - B Estandia-Ortega
- Laboratorio de Biología Molecular, Departamento de Genética Humana, Instituto Nacional de Pediatría, Secretaría de Salud, Coyoacán, Distrito Federal, México
| | - M E Reyna-Fabián
- Laboratorio de Biología Molecular, Departamento de Genética Humana, Instituto Nacional de Pediatría, Secretaría de Salud, Coyoacán, Distrito Federal, México
| | - C D Méndez-Adame
- Instituto Nacional de Pediatría, Secretaría de Salud, Coyoacán, Distrito Federal, México
| | - A González-Del Angel
- Laboratorio de Biología Molecular, Departamento de Genética Humana, Instituto Nacional de Pediatría, Secretaría de Salud, Coyoacán, Distrito Federal, México
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Alcántara-Ortigoza MA, García-de Teresa B, González-Del Angel A, Berumen J, Guardado-Estrada M, Fernández-Hernández L, Navarrete-Martínez JI, Maza-Morales M, Rius-Domínguez R. Wide allelic heterogeneity with predominance of large IDS gene complex rearrangements in a sample of Mexican patients with Hunter syndrome. Clin Genet 2016; 89:574-83. [PMID: 26762690 DOI: 10.1111/cge.12738] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 12/26/2015] [Accepted: 01/11/2016] [Indexed: 11/29/2022]
Abstract
Hunter syndrome or mucopolysaccharidosis type II (MPSII) is caused by pathogenic variants in the IDS gene. This is the first study that examines the mutational spectrum in 25 unrelated Mexican MPSII families. The responsible genotype was identified in 96% of the families (24/25) with 10 novel pathogenic variants: c.133G>C, c.1003C>T, c.1025A>C, c.463_464delinsCCGTATAGCTGG, c.754_767del, c.1132_1133del, c.1463del, c.508-1G>C, c.1006+1G>T and c.(-217_103del). Extensive IDS gene deletions were identified in four patients; using DNA microarray analysis two patients showed the loss of the entire AFF2 gene, and epilepsy developed in only one of them. Wide allelic heterogeneity was noted, with large gene alterations (e.g. IDS/IDSP1 gene inversions, partial to extensive IDS deletions, and one chimeric IDS-IDSP1 allele) that occurred at higher frequencies than previously reported (36% vs 18.9-29%). The frequency of carrier mothers (80%) is consistent with previous descriptions (>70%). Carrier assignment allowed molecular prenatal diagnoses. Notably, somatic and germline mosaicism was identified in one family, and two patients presented thrombocytopenic purpura and pancytopenia after idursulfase enzyme replacement treatment. Our findings suggest a wide allelic heterogeneity in Mexican MPSII patients; DNA microarray analysis contributes to further delineation of the resulting phenotype for IDS and neighboring loci deletions.
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Affiliation(s)
- M A Alcántara-Ortigoza
- Laboratorio de Biología Molecular, Departamento de Genética Humana, Instituto Nacional de Pediatría, Distrito Federal, México
| | - B García-de Teresa
- Laboratorio de Biología Molecular, Departamento de Genética Humana, Instituto Nacional de Pediatría, Distrito Federal, México
| | - A González-Del Angel
- Laboratorio de Biología Molecular, Departamento de Genética Humana, Instituto Nacional de Pediatría, Distrito Federal, México
| | - J Berumen
- Departamento de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Distrito Federal, México.,Unidad de Medicina Genómica, Hospital General de México, Distrito Federal, México
| | - M Guardado-Estrada
- Unidad de Medicina Genómica, Hospital General de México, Distrito Federal, México
| | - L Fernández-Hernández
- Laboratorio de Biología Molecular, Departamento de Genética Humana, Instituto Nacional de Pediatría, Distrito Federal, México
| | - J I Navarrete-Martínez
- Servicio de Genética. Hospital de Alta Especialidad PEMEX Picacho Sur, Distrito Federal, México
| | - M Maza-Morales
- Médico Residente de Pediatría, Instituto Nacional de Pediatría, Distrito Federal, México
| | - R Rius-Domínguez
- Médico Residente de Genética Médica, Departamento de Genética Humana, Instituto Nacional de Pediatría, Distrito Federal, México
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González-Del Angel A, Bermúdez-López C, Alcántara-Ortigoza MA, Vela-Amieva M, Castillo-Cruz RA, Martínez V, Torres-Espíndola L. Thiopurine S-methyltransferase (TPMT) genetic polymorphisms in Mexican newborns. J Clin Pharm Ther 2010; 34:703-8. [PMID: 20175804 DOI: 10.1111/j.1365-2710.2009.01058.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND Thiopurine S-methyltransferase (TPMT) is involved in the toxicity and therapeutic efficacy of thiopurine drugs, and its gene exhibits genetic polymorphisms that differ across diverse populations. Four TPMT polymorphisms (TPMT*2, *3A, *3B and *3C) account for 80-95% of alleles that cause reduced enzyme activity. To date, only a single study in the Mexican population involving 108 individuals has been performed, but the regional and ethnic origin of this population was not described. Accordingly, information about the TPMT polymorphism in the Mexican population is limited. OBJECTIVE To determine the TPMT allele and genotype frequencies in a sample of newborns from Mexico City. METHODS Three hundred and sixty DNA samples from unrelated, anonymous individuals were obtained from dried blood spots collected on filter paper as part of the Newborn Screening National Program. Allele-specific polymerase chain reaction for the TPMT*2 allele and PCR restriction fragment length polymorphism for TPMT*3A, TPMT*3B, TPMT*3C alleles were used to determine the respective allelic and genotypic frequencies. RESULTS AND DISCUSSION Of 720 TPMT alleles analysed, 49 (6.81%) were deficiency alleles. The most common deficiency allele was TPMT*3A (5.69%), followed by TPMT*3C (0.56%), TPMT*3B (0.28%) and TPMT*2 (0.28%). Fourty-five newborns were heterozygous for one mutant allele (12.5%) and two showed a genotype with two deficiency alleles (0.56%). Despite its unique ethnic composition, our Mexican population exhibited variant allele frequencies that were similar to some Caucasian populations. CONCLUSION Our data suggest that approximately 1 in 180 persons born in Mexico City might have low or undetectable TPMT enzyme activity, a frequency that, overall, is somewhat higher than that reported for Caucasian populations generally (1 in 300).
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Affiliation(s)
- A González-Del Angel
- Molecular Biology Laboratory, Genetics Department, Instituto Nacional de Pediatría, DF, México.
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Yokoyama E, Del Castillo V, Ramos S, Angel AGD. Omphalocele, bladder exstrophy, imperforate anus, spine defects complex, and bilateral cleft lip and palate in one product of a triplet pregnancy obtained by in vitro fertilization: a case report. Am J Med Genet A 2007; 143A:1933-5. [PMID: 17632776 DOI: 10.1002/ajmg.a.31828] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
MESH Headings
- Abnormalities, Multiple/diagnosis
- Abnormalities, Multiple/etiology
- Abnormalities, Multiple/pathology
- Anus, Imperforate/embryology
- Anus, Imperforate/etiology
- Anus, Imperforate/pathology
- Bladder Exstrophy/embryology
- Bladder Exstrophy/etiology
- Bladder Exstrophy/pathology
- Cleft Lip/embryology
- Cleft Lip/etiology
- Cleft Lip/pathology
- Cleft Palate/embryology
- Cleft Palate/etiology
- Cleft Palate/pathology
- Female
- Fertilization in Vitro/adverse effects
- Hernia, Umbilical/embryology
- Hernia, Umbilical/etiology
- Hernia, Umbilical/pathology
- Humans
- Infant, Newborn
- Male
- Maternal Age
- Pregnancy
- Pregnancy, High-Risk
- Spine/abnormalities
- Triplets
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Affiliation(s)
- E Yokoyama
- Department of Human Genetics, Instituto Nacional de Pediatría, México
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