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Rodrigues MGF, Firmino AC, Valentim JJ, Pavan BE, Ferreira AFA, Monteiro LNH, Ramos ES, Soutello RVG. Correlation of genome methylation of fig tree accessions with natural nematode and rust incidence. BRAZ J BIOL 2024; 84:e263041. [DOI: 10.1590/1519-6984.263041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 06/24/2022] [Indexed: 11/22/2022] Open
Abstract
Abstract Commercial fig tree cultivation in Brazil involves a single cultivar, ‘Roxo-de-Valinhos’. The use of a single cultivar results in serious diseases and related problems. The aim of this study was to characterize fig accessions by analyzing the natural root-knot nematode and leaf rust incidence in relation to the epigenomic profile of the plant, since epigenetic variations affect plant–pathogen interactions. All plants were attacked by nematodes, indicating susceptibility; Meloidogyne incognita was the root-knot nematode species involved. Joint analysis of data showed that methylation and leaf rust incidence were correlated when observed in the same phenological phase, presenting initial evidence of the same factorial pressure loads in genotypes, suggesting similar behavior within these genotypes.
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Affiliation(s)
| | - A. C. Firmino
- Universidade Estadual Paulista “Júlio de Mesquita Filho”, Brasil
| | - J. J. Valentim
- Universidade Estadual Paulista “Júlio de Mesquita Filho”, Brasil
| | - B. E. Pavan
- Universidade Estadual Paulista “Júlio de Mesquita Filho”, Brasil
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Caetano LC, Gennaro FGO, Coelho K, Araújo FM, Vila RA, Araújo A, de Melo Bernardo A, Marcondes CR, Chuva de Sousa Lopes SM, Ramos ES. Differential expression of the MHM region and of sex-determining-related genes during gonadal development in chicken embryos. Genet Mol Res 2014; 13:838-49. [PMID: 24615048 DOI: 10.4238/2014.february.13.2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The chicken (Gallus gallus) embryo has been used as a classic model system for developmental studies because of its easy accessibility for surgical manipulation during embryonic development. Sex determination in birds is chromosomally based (ZZ for males and ZW for females); however, the basic mechanism of sex determination is still unknown. Here, the dynamics of expression of candidate genes implicated in vertebrate sex determination and differentiation were studied during embryonic chicken gonadal development. Gene expression profiles were obtained before, during, and after gonadal sex differentiation in females and males for DMRT1, SOX3, SOX9, DAX1, SCII, HINTZ, HINTW, and the male hypermethylated (MHM) region. Transcripts for the HINTZ, DMRT1, DAX1, SCII, and SOX9 genes were observed in both sexes, but expression was higher in male gonads and may be correlated with testicular differentiation. The expression patterns of HINTW, SOX3, and MHM suggest that they may act in ovary development and may be involved in meiosis entry. MHM was upregulated and DMRT1 was downregulated in females at the same developmental stage. This may indicate a regulation of DMRT1 by MHM ncRNA. Similar dynamics were observed between HINTW and HINTZ. This study reports on the MHM expression profile during gonadal development and its correlation with the expression of genes involved in vertebrate sex determination.
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Affiliation(s)
- L C Caetano
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - F G O Gennaro
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - K Coelho
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - F M Araújo
- Departamento de Ginecologia e Obstetrícia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - R A Vila
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - A Araújo
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - A de Melo Bernardo
- Department of Anatomy and Embryology, Leiden University Medical Center, Leiden, The Netherlands
| | | | | | - E S Ramos
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
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Magalhães HR, Leite SBP, Paz CCPD, Duarte G, Ramos ES. Placental hydroxymethylation vs methylation at the imprinting control region 2 on chromosome 11p15.5. Braz J Med Biol Res 2013; 46:916-919. [PMID: 24270911 PMCID: PMC3854339 DOI: 10.1590/1414-431x20133035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Accepted: 07/23/2013] [Indexed: 12/19/2022] Open
Abstract
In addition to methylated cytosines (5-mCs), hydroxymethylcytosines (5-hmCs) are present in CpG dinucleotide-enriched regions and some transcription regulator binding sites. Unlike methylation, hydroxymethylation does not result in silencing of gene expression, and the most commonly used methods to study methylation, such as techniques based on restriction enzymatic digestion and/or bisulfite modification, are unable to distinguish between them. Genomic imprinting is a process of gene regulation where only one member of an allelic pair is expressed depending on the parental origin. Chromosome 11p15.5 has an imprinting control region (ICR2) that includes a differentially methylated region (KvDMR1) that guarantees parent-specific gene expression. The objective of the present study was to determine the presence of 5-hmC at the KvDMR1 in human placentas. We analyzed 16 third-trimester normal human placentas (chorionic villi). We compared two different methods based on real-time PCR after enzymatic digestion. The first method distinguished methylation from hydroxymethylation, while the other method did not. Unlike other methylation studies, subtle variations of methylation in ICRs could represent a drastic deregulation of the expression of imprinted genes, leading to important phenotypic consequences, and the presence of hydroxymethylation could interfere with the results of many studies. We observed agreement between the results of both methods, indicating the absence of hydroxymethylation at the KvDMR1 in third-trimester placentas. To the best of our knowledge, this is the first study describing the investigation of hydroxymethylation in human placenta using a genomic imprinting model.
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Affiliation(s)
- H R Magalhães
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão PretoSP, Brasil
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da Silva AM, de Freitas MAR, Rios AFL, Renzi A, Lôbo RB, Galerani MAV, Vila RA, Ramos ES. Identification of a DNA methylation point in the promoter region of the bovine CYP21 gene. Genet Mol Res 2012; 10:1409-15. [PMID: 21823090 DOI: 10.4238/vol10-3gmr1266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The CYP21 (steroid 21-hydroxylase) gene is involved in the synthesis of steroid hormones. Bov-A2 is a retroposon that is common in ruminant genomes. The promoter region of bovine CYP21 contains a short interspersed nucleotide element of Bov-A2, which overlaps a putative Sp1 binding site. We looked for RFLP/HpaII polymorphism in the Bov-A2 element in bovine Zebu breeds by PCR-RFLP, and examined whether polymorphism in this element is associated with methylation. Among DNA samples from 135 Brazilian Zebu breed cattle, we identified an RFLP/HpaII polymorphism (T/C), which, based on a restriction methylation-sensitive assay employing HpaII and isoschizomer MspI enzymes (methylation-sensitive and -non-sensitive enzymes, respectively), appears to be a DNA methylation point. This is the first report of this polymorphism and on DNA methylation in the bovine CYP21 promoter region in Brazilian Zebu cattle.
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Affiliation(s)
- A M da Silva
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
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Lemos DC, Takeuchi PL, Rios AFL, Araújo A, Lemos HC, Ramos ES. Bovine fetal DNA in the maternal circulation: Applications and implications. Placenta 2011; 32:912-3. [PMID: 21855135 DOI: 10.1016/j.placenta.2011.07.088] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Revised: 07/26/2011] [Accepted: 07/27/2011] [Indexed: 01/11/2023]
Abstract
OBJECTIVE The main aim of the present study was to detect bovine fetal DNA in the maternal circulation, a relatively unexplored subject in the literature. STUDY DESIGN DNA was extracted from blood of 84 primipara cows (Bos indicus) at different gestational ages (30-270 days) and from 100 adult animals (50 males and 50 non-pregnant cows). The samples were analyzed using PCR with primers for TSPY gene. RESULTS Molecular results matched the fetal phenotypic gender in all 47 male and 37 female fetuses, including early pregnancy, and in control animals. CONCLUSIONS These results evidence a bovine transplacental fetal DNA passage.
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Affiliation(s)
- D C Lemos
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil.
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Soares MR, Huber J, Rios AFL, Ramos ES. Investigation of IGF2/ApaI and H19/RsaI polymorphisms in patients with cutaneous melanoma. Growth Horm IGF Res 2010; 20:295-297. [PMID: 20483645 DOI: 10.1016/j.ghir.2010.03.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2009] [Revised: 03/23/2010] [Accepted: 03/23/2010] [Indexed: 01/11/2023]
Abstract
OBJECTIVE The etiology of cutaneous melanoma is complex, involving both heterogeneous genetic and environmental components. The aim of our study was to verify if single polymorphic sites within IGF2 and H19 genes and their consequent haplotypes influence risk and/or prognosis of familial melanoma. DESIGN Twenty one patients with clinical criteria of hereditary melanoma (early onset, presence of multiple primary melanoma, and/or one or more affected first- or second-degree relatives) and previously screened for CDKN2A mutations were genotyped by IGF2/ApaI and H19/RsaI PCR-RFLPs. Data were compared between patients and a control group (100 healthy young individuals) using Chi-square and Fisher's exact tests. We also investigated if these polymorphic sites could be microRNAs potential targets, using RegRNA software. RESULTS Although the IGF2 and H19 genotypes/haplotypes were not significantly associated with melanoma, two of the most severe cases (very early onset or multiple melanomas) showed to be heterozygous for both genes. We found an overlap between IGF2/ApaI and miR-615-5p, and between H19/RsaI and miR-574-3p. CONCLUSIONS Some studies have shown H19, and IGF2 genes (or related genes or protein, for example, IGF2R and IMP-3) differential expression in melanoma. However, no study has attempted to examine markers across this cluster in relation to melanoma until now. Since the base change may impair the pairing of microRNA and its binding site, our results suggest a new window for future studies of IGF2 and H19 genetic variability and posttranscriptional regulation. Due to the importance and based on the present results, we suggest that the genotype/haplotype analysis of IGF2 and H19 polymorphisms should be better investigated in large populations with cutaneous melanoma, attempting to tie the association with progression of the disease.
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Affiliation(s)
- M R Soares
- Department of Gynecology and Obstetrics, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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Martins da Silva A, Rios AFL, Ramos ES, Cardoso VL, Vercesi Filho AE, Lôbo RB, Freitas MAR. IGF2/Mboll polymorphism in Gir and Nelore cattle. Dev Biol (Basel) 2008; 132:287-291. [PMID: 18817315 DOI: 10.1159/000317173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The imprinted gene insulin-like growth factor 2 (IGF2) carries out important functions in the development of placental mammals, during the embryonic and fetal stages and is located on bovine chromosome 29. The main aim of this study was to verify the occurrence of a polymorphism (C/T transversion) in exon 6 of the IGF2 gene in Gir and Nelore cattle, Zebu breeds of great economic importance in Brazil for dairy and beef production, respectively. A 193 bp fragment of bovine IGF2 exon 6 was amplified by PCR with specific primers for this region and digested with Mboll enzyme to analyze the polymorphic segment. In a total of 39 Gir animals (29 females and 10 males), the estimated frequencies of the C and T alleles were 0.42 and 0.58, respectively. The genotypic frequencies were 0.10 for CC, 0.26 for TT and 0.64 for CT. For 28 Nelore animals (17 females and 11 males), the estimated frequencies of the C and T alleles were 0.43 and 0.57, respectively. The genotypic frequencies were 0.18 for CC, 0.32 for TT, and 0.50 for CT. This is the first report of the occurrence of this polymorphism in these breeds. The polymorphic site can be a regulatory motif with functional significance to gene regulation of the IGF2 gene. This polymorphism could be used to investigate the allele-specific expression of the IGF2 gene, its epigenetic status, and its role in developmental, growth and reproductive traits.
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Abstract
OBJECTIVE To verify the occurrence of preeclampsia/eclampsia (PE/E) or gestational hypertension (GH) in first-degree relatives of Brazilian pregnant women. METHODS A total of 485 women were enrolled in the study, and 226 were selected (75 with PE/E, 49 with GH, and 102 women with normal pregnancies). Statistical analysis was performed using Fisher's exact test. RESULTS The frequency of families with mothers and/or sisters with PE/E was higher among the PE/E group compared to the GH and the control groups, and was statistically significant (p < 0.05). CONCLUSION Women with PE/E have more female first-degree relatives with PE/E as observed in a Brazilian population.
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Affiliation(s)
- F M Araujo
- Department of Obstetrics and Gynecology, University Hospital of Medicine School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
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Gomes MV, Gomes CC, Pinto W, Ramos ES. Methylation pattern at the KvDMR in a child with Beckwith–Wiedemann syndrome conceived by ICSI. Am J Med Genet A 2007; 143A:625-9. [PMID: 17318850 DOI: 10.1002/ajmg.a.31628] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- M V Gomes
- Department of Genetics, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
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Abstract
CDKN2A has been implicated as a melanoma susceptibility gene in some kindreds with a family history of this disease. Mutations in CDKN2A may produce an imbalance between functional p16ink4a and cyclin D causing abnormal cell growth. We searched for germline mutations in this gene in 22 patients with clinical criteria of hereditary cancer (early onset, presence of multiple primary melanoma or 1 or more first- or second-degree relatives affected) by secondary structural content prediction, a mutation scanning method that relies on the propensity for single-strand DNA to take on a three-dimensional structure that is highly sequence dependent, and sequencing the samples with alterations in the electrophoretic mobility. The prevalence of CDKN2A mutation in our study was 4.5% (1/22) and there was a correlation between family history and probability of mutation detection. We found the P48T mutation in 1 patient with 2 melanoma-affected relatives. The patient descends from Italian families and this mutation has been reported previously only in Italian families in two independent studies. This leads us to suggest the presence of a mutational "hotspot" within this gene or a founder mutation. We also detected a high prevalence (59.1%) of polymorphisms, mainly alleles 500 C/G (7/31.8%) or 540 C/T (6/27.3%), in the 3' untranslated region of exon 3. This result reinforces the idea that these rare polymorphic alleles have been significantly associated with the risk of developing melanoma.
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Affiliation(s)
- J Huber
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, São Paulo, SP, Brazil.
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Gomes MVM, Soares MR, Pasqualim-Neto A, Marcondes CR, Lôbo RB, Ramos ES. Association between birth weight, body mass index and IGF2/ApaI polymorphism. Growth Horm IGF Res 2005; 15:360-362. [PMID: 16102992 DOI: 10.1016/j.ghir.2005.06.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2005] [Revised: 06/01/2005] [Accepted: 06/18/2005] [Indexed: 11/18/2022]
Abstract
Insulin-like growth factor II (IGF-II) is a polypeptide that plays a key role in mammalian growth, influencing fetal cell division, differentiation, and possibly metabolic regulation. In adult humans, polymorphisms of the IGF2 gene have been associated with predisposition to obesity. In the present study, we tested the association between IGF2/ApaI genotype and Body Mass Index (BMI) in 294 healthy volunteers (95 men and 199 women; 18-30y) and correlated the results with their birth weights (BW) in order to investigate the relationship between this polymorphic site, fetal life and adult BMI. Blood samples were obtained for DNA extraction, PCR and genotyping. The statistical analyses were performed by the Chi-square, Kolmogorov-Smirnov normality, and Tukey post hoc tests. Although the IGF2 genotype was not significantly associated with BMI and/or BW, we observed a statistically significant correlation of 0.33 (p < 0.023) between BW and BMI in GG subjects whose BW was higher than 3.5 kg (n = 47). We hypothesize that high BWs associated with homozygosis for the G allele of IGF2/ApaI is not a null factor and might be associated with predisposition to high BMI in young adults.
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Affiliation(s)
- M V M Gomes
- Department of Genetics, Medical School of Ribeirão Preto, University of São Paulo, Avenida Bandeirantes, Ribeirão Preto, SP, Brazil.
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Carvalho DR, Alves VVB, Minaré-Júnior A, Peres LC, Pina-Neto JM, Ramos ES. Noonan syndrome associated with unilateral iris coloboma and congenital chylothorax in an infant. Clin Dysmorphol 2003; 12:143-4. [PMID: 12868481 DOI: 10.1097/00019605-200304000-00015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Chylothorax and colobomas are uncommon features reported in Noonan syndrome. We describe an infant with Noonan phenotype, congenital chylothorax and a unilateral iris coloboma. The presence of these both abnormalities in the same patient has not previously been reported.
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Abstract
We describe two unrelated boys with bilateral fibula aplasia, poly- and oligodactyly, and bowed tibiae in two non-consanguineous Brazilian families. These cases are similar to those reported by Fuhrman et al. [(1980). Skeletal Dysplasias. New York: Alan R. Liss Inc. pp. 519-524].
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Affiliation(s)
- J Huber
- Department of Genetics, Medicine School of Ribeirão Preto, University of São Paulo, USP, Ribeirão Preto 14049-900, Brasil.
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Sandrin-Garcia P, Macedo C, Martelli LR, Ramos ES, Guion-Almeida ML, Richieri-Costa A, Passos GAS. Recurrent 22q11.2 deletion in a sibship suggestive of parental germline mosaicism in velocardiofacial syndrome. Clin Genet 2002; 61:380-3. [PMID: 12081724 DOI: 10.1034/j.1399-0004.2002.610511.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [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: 11/23/2022]
Abstract
Deletions of chromosome 22q11.2 are recognized as the main cause of a number of clinical phenotypes, including velocardiofacial syndrome (VCFS) and DiGeorge syndrome (DGS). Velocardiofacial syndrome is a relatively common developmental disorder that is characterized by craniofacial anomalies and conotruncal heart defects. Most 22q11.2 deletions occur sporadically, although the deletion may be transmitted in some cases. The present performed a molecular analysis in one family including a patient with clinical diagnosis of VCFS and his sister with a suggestive phenotype. Six polymorphic 22q11.2 markers (i.e. D22S420, D22S264, D22S941, D22S306, D22S425 and D22S257) were used for genotype analysis of the DNA from the patients and unaffected relatives. The results revealed a 22q11.2 deletion in the patient and his sister from one of six markers (i.e. D22S941). Genotype analysis demonstrated that the deletion in this sib was of maternal origin. The results suggest that the mother probably has gonadal mosaicism. The other relatives present normal DNA profiles for all markers. These results have implications for genetic counseling because of a risk of transmission by germ cells carrying the deletion, even when parents present with a normal DNA profile in their blood cells.
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Affiliation(s)
- P Sandrin-Garcia
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Genética, Ribeirão Preto, SP, Brazil
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Abstract
PURPOSE The objective of the present study was to determine the prevalence of endometriosis among the relatives of patients with confirmed endometriosis. METHODS We analyzed the prevalence of endometriosis among first-, second-, and third-degree relatives in a group of 101 patients with varying symptoms related to endometriosis seen at two public hospitals and submitted to laparoscopy and/or laparotomy. The control group consisted of 43 women submitted to laparoscopy without a diagnosis of endometriosis. RESULTS Among the patients with endometriosis, we detected nine families with a positive history of endometriosis, comprising one mother, six sisters, three aunts, and two cousins, as opposed to no case among the controls. CONCLUSIONS These data confirm a familial tendency for endometriosis and suggest that this disorder has a genetic basis.
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Affiliation(s)
- R M dos Reis
- Department of Gynecology and Obstetrics, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Brazil
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Abstract
Spondylocarpotarsal synostosis syndrome (SSS) or congenital synspondylism is a recently delineated clinical entity. At least 15 patients have been reported. We present 3 new patients, 2 of whom were sibs born to first-cousin parents. All of our patients had multiple synostoses involving cervical, thoracic and/or lumbar vertebral bodies and carpal/tarsal bones, scoliosis/lordosis, and short stature. Sensorineural deafness was found in 2 of the 3 patients. Analysis of clinical manifestations suggests clinical variability and genetic heterogeneity in SSS. Of a total of 18 SSS patients, 10 were five pairs of sibs from five families, with first-cousin consanguinity of parents in 3, indicating that at least one type of SS is an autosomal-recessive disorder.
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Affiliation(s)
- K E Coêlho
- Departamento de Genetica, Faculdade de Medicina de Ribeirao Preto, Universidade de Sao Paulo, Brazil
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Ramos ES, Moreira-Filho CA, Vicente YA, Llorach-Velludo MA, Tucci S, Duarte MH, Araújo AG, Martelli L. SRY-negative true hermaphrodites and an XX male in two generations of the same family. Hum Genet 1996; 97:596-8. [PMID: 8655137 DOI: 10.1007/bf02281867] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [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: 02/01/2023]
Abstract
Two 46,XX true hermaphrodites and one XX male without genital ambiguities are reported. They coexist in two generations of the same pedigree, with paternal transmission and in the absence of SRY (sex-determining region, Y chromosome). These familial cases provide evidence to support the hypothesis that these disorders are alternative manifestations of the same genetic defect, probably an autosomal dominant mutation (with incomplete penetrance) or an X-linked mutation (limited by the presence of the Y chromosome).
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Affiliation(s)
- E S Ramos
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Brazil
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Ramos ES. Survey of the regulatory aspects of carcinogenic substances in Spain. Med Lav 1986; 77:412-7. [PMID: 3784951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Ramos ES. [Communication in nursing. Communication in public health nursing]. Rev Paul Enferm 1983; 3:102. [PMID: 6555889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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