scholarly journals Somatic and Germline Mosaicism for a Mutation of the PHEX Gene Can Lead to Genetic Transmission of X-Linked Hypophosphatemic Rickets That Mimics an Autosomal Dominant Trait

2006 ◽  
Vol 91 (2) ◽  
pp. 365-370 ◽  
Author(s):  
Katsumi Goji ◽  
Kayo Ozaki ◽  
Ahmad H. Sadewa ◽  
Hisahide Nishio ◽  
Masafumi Matsuo
Keyword(s):  
Autosomal Dominant ◽  
Molecular Genetic ◽  
Autosomal Dominant Inheritance ◽  
Hypophosphatemic Rickets ◽  
Nucleotide Sequencing ◽  
Dominant Inheritance ◽  
Dominant Trait ◽  
Autosomal Dominant Trait ◽  
Germline Mosaicism ◽  
Genetic Transmission

Context: Familial hypophosphatemic rickets is usually transmitted as an X-linked dominant disorder (XLH), although autosomal dominant forms have also been observed. Genetic studies of these disorders have identified mutations in PHEX and FGF23 as the causes of X-linked dominant disorder and autosomal dominant forms, respectively. Objective: The objective of the study was to describe the molecular genetic findings in a family affected by hypophosphatemic rickets with presumed autosomal dominant inheritance. Patients: We studied a family in which the father and the elder of his two daughters, but not the second daughter, were affected by hypophosphatemic rickets. The pedigree interpretation of the family suggested that genetic transmission of the disorder occurred as an autosomal dominant trait. Methods and Results: Direct nucleotide sequencing of FGF23 and PHEX revealed that the elder daughter was heterozygous for an R567X mutation in PHEX, rather than FGF23, suggesting that the genetic transmission occurred as an X-linked dominant trait. Unexpectedly, the father was heterozygous for this mutation. Single-nucleotide primer extension and denaturing HPLC analysis of the father using DNA from single hair roots revealed that he was a somatic mosaic for the mutation. Haplotype analysis confirmed that the father transmitted the genotypes for 18 markers on the X chromosome equally to his two daughters. The fact that the father transmitted the mutation to only one of his two daughters indicated that he was a germline mosaic for the mutation. Conclusions: Somatic and germline mosaicism for an X-linked dominant mutation in PHEX may mimic autosomal dominant inheritance.

Meniere's Syndrome Inherited as an Autosomal Dominant Trait

1992 ◽  
Vol 101 (7) ◽  
pp. 590-594 ◽  
Author(s):  
Carlos A. Oliveira ◽  
Ana Maria Braga
Keyword(s):  
Autosomal Dominant ◽  
Identical Twins ◽  
Dominant Trait ◽  
Close Attention ◽  
Autosomal Dominant Trait ◽  
Genetic Transmission ◽  
Autosomal Dominant Transmission ◽  
Migraine Headaches ◽  
Family Histories ◽  
The Family

Brown in 1941 reported on five families having two members with Meniere's syndrome. In 1949 she reported on three siblings (children of first cousins) and two identical twins bearing the syndrome. Bernstein in 1965 reported on seven families having two or more members afflicted by the symptoms. All these reports showed association between Meniere's syndrome and migraine headaches. None provided detailed pedigree studies in order to clarify the mode of genetic transmission. We report on a father, three daughters, and one son with typical Meniere's syndrome and paroxysmal headaches. The pedigree strongly suggests autosomal dominant transmission. After studying this family we have been paying close attention to family histories of Meniere's syndrome patients. It is not at all uncommon to hear about other members of the family with the syndrome, but it is difficult to document all of the cases for logistical reasons.

scholarly journals Effective variant filtering and expected candidate variant yield in studies of rare human disease

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Brent S. Pedersen ◽  
Joe M. Brown ◽  
Harriet Dashnow ◽  
Amelia D. Wallace ◽  
Matt Velinder ◽  
...  
Keyword(s):  
Whole Genome Sequencing ◽  
Rare Disease ◽  
Genome Sequencing ◽  
Autosomal Dominant ◽  
De Novo ◽  
Autosomal Dominant Inheritance ◽  
Compound Heterozygous ◽  
Whole Genome ◽  
Dominant Inheritance ◽  
Family Based

AbstractIn studies of families with rare disease, it is common to screen for de novo mutations, as well as recessive or dominant variants that explain the phenotype. However, the filtering strategies and software used to prioritize high-confidence variants vary from study to study. In an effort to establish recommendations for rare disease research, we explore effective guidelines for variant (SNP and INDEL) filtering and report the expected number of candidates for de novo dominant, recessive, and autosomal dominant modes of inheritance. We derived these guidelines using two large family-based cohorts that underwent whole-genome sequencing, as well as two family cohorts with whole-exome sequencing. The filters are applied to common attributes, including genotype-quality, sequencing depth, allele balance, and population allele frequency. The resulting guidelines yield ~10 candidate SNP and INDEL variants per exome, and 18 per genome for recessive and de novo dominant modes of inheritance, with substantially more candidates for autosomal dominant inheritance. For family-based, whole-genome sequencing studies, this number includes an average of three de novo, ten compound heterozygous, one autosomal recessive, four X-linked variants, and roughly 100 candidate variants following autosomal dominant inheritance. The slivar software we developed to establish and rapidly apply these filters to VCF files is available at https://github.com/brentp/slivar under an MIT license, and includes documentation and recommendations for best practices for rare disease analysis.

scholarly journals Expanding the genetic spectrum of primary familial brain calcification due to SLC2OA2 mutations: a case series

Neurogenetics ◽  
2021 ◽  
Author(s):  
Luca Magistrelli ◽  
Roberta Croce ◽  
Fabiola De Marchi ◽  
Chiara Basagni ◽  
Miryam Carecchio ◽  
...  
Keyword(s):  
Autosomal Dominant ◽  
Case Series ◽  
Dominant Trait ◽  
Autosomal Dominant Trait ◽  
Phenotypic Spectrum ◽  
Primary Familial Brain Calcification ◽  
Psychiatric Disturbances ◽  
Brain Calcification ◽  
Uncertain Significance ◽  
Six Genes

AbstractPrimary familial brain calcification (PFBC) is a neurological condition characterized by the presence of intracranial calcifications, mainly involving basal ganglia, thalamus, and dentate nuclei. So far, six genes have been linked to this condition: SLC20A2, PDGFRB, PDGFB, and XPR1 inherited as autosomal-dominant trait, while MYORG and JAM2 present a recessive pattern of inheritance. Patients mainly present with movement disorders, psychiatric disturbances, and cognitive decline or are completely asymptomatic and calcifications may represent an occasional finding. Here we present three variants in SLC20A2, two exonic and one intronic, which we found in patients with PFBC associated to three different clinical phenotypes. One variant is novel and two were already described as variants of uncertain significance. We confirm the pathogenicity of these three variants and suggest a broadening of the phenotypic spectrum associated with mutations in SLC20A2.

Complex Segregation Analysis of Thyroid Autoantibodies: Are They Inherited as an Autosomal Dominant Trait?

1993 ◽  
Vol 43 (3) ◽  
pp. 141-146 ◽  
Author(s):  
D.I.W Phillips ◽  
D.C. Shields ◽  
J.M. Dugoujon ◽  
L. Prentice ◽  
P. McGuffin ◽  
...  
Keyword(s):  
Segregation Analysis ◽  
Autosomal Dominant ◽  
Thyroid Autoantibodies ◽  
Dominant Trait ◽  
Autosomal Dominant Trait ◽  
Complex Segregation Analysis

Genomic features of lung cancer patients harboring germline mutations associated with hereditary cancer syndromes.

2021 ◽  
Vol 39 (15_suppl) ◽  
pp. e20511-e20511
Author(s):  
Jian Sun ◽  
Weiran Wang ◽  
Danhua Wang ◽  
Hongling Yuan ◽  
Tonghui Ma
Keyword(s):  
Lung Cancer ◽  
Cancer Patients ◽  
Autosomal Recessive ◽  
Autosomal Dominant ◽  
Autosomal Recessive Inheritance ◽  
Germline Mutations ◽  
Autosomal Dominant Inheritance ◽  
Recessive Inheritance ◽  
Dominant Inheritance ◽  
Lung Cancer Patients

e20511 Background: Smoking and air pollution are the major causes of lung cancer; however, numerous studies have demonstrated that genetic factors also contribute to the development of lung cancer. Here, we reported an analysis of genomic features in 65 lung cancer patients with autosomal-dominant or autosomal-recessive inheritance of germline mutations. Methods: We retrospectively reviewed next-generation sequencing data of 26,904 lung cancer patients in a Chinese cohort. The germline mutation patterns, as well as the co-occurrence with somatic driver mutations were analyzed. Results: A total of 65 (0.24%) patients with heterozygous germline mutations associated with hereditary cancer syndromes were detected, including 27 (0.10%) patients with autosomal-dominant inheritance (BRCA1, BRCA2, RET and TP53) and 38 (0.14%) patients with autosomal-recessive inheritance (ATM, BLM, FANCA, FANCG, MUTYH, NBN, RECQL4 and WRN). Comparing to patients with autosomal-dominant inheritance (Age 56±17.8), patients with autosomal-recessive inheritance (Age 65±11.7, P = 0.009) were older, and there is no gender difference. Additionally, 66.7% (18/27) of patients with autosomal-dominant inheritance were identified co-mutated actionable variations, such as 12 patients harboring mutations in exon 18–21 of EGFR, 2 patients harboring ERBB2 exon 20 insertions, 3 patients harboring mutations in exon 2 of KRAS and 1 patient harboring EML4-ALK fusion. The coexistence of germline autosomal-dominant mutations and somatic driver mutations indicated that germline mutations have weak impact on lung cancer. Simultaneously, 52.6% (20/38) of patients with autosomal-recessive inheritance were identified co-mutated actionable variations, such as 15 EGFR+ patients, 2 ERBB2+ patients and 3 KRAS+ patients. And there was no significant difference in population frequency of co-mutated actionable variations between the two groups. Conclusions: In summary, studies on germline mutations of lung cancer patients may help to elucidate the etiology and mechanism of lung cancer, and may help for early detection and diagnosis, targeted therapy and improved prevention strategies.

Familial Spontaneous Pneumothorax

PEDIATRICS ◽  
1979 ◽  
Vol 64 (2) ◽  
pp. 172-175
Author(s):  
William G. Wilson ◽  
Arthur S. Aylsworth
Keyword(s):  
Statistical Analysis ◽  
Spontaneous Pneumothorax ◽  
Autosomal Dominant ◽  
Autosomal Dominant Inheritance ◽  
Familial Occurrence ◽  
Review Of The Literature ◽  
Dominant Inheritance ◽  
Pedigree Data ◽  
Fathers And Sons ◽  
Male To Female

A family is described in which four persons in three generations suffered spontaneous pneumothoraces: a newborn, an infant, an adolescent, and an adult. Review of the literature reveals 61 reports of familial spontaneous pneumothorax in 22 families. The ratio of male to female cases is approximately 1.8. Affected parents and affected children (including affected fathers and sons) are seen in ten families, while affected siblings with unaffected parents are noted in 13 families. Consanguinity has not been reported. Although autosomal dominant inheritance has been suggested as an explanation of familial spontaneous pneumothorax, available pedigree data are not adequate for statistical analysis. Physicians should be aware of the familial occurrence of spontaneous pneumothorax so that members of such families may be appropriately managed when problems arise.

scholarly journals Evidence for Autosomal Dominant Inheritance of Prostate Cancer

1998 ◽  
Vol 62 (6) ◽  
pp. 1425-1438 ◽  
Author(s):  
Daniel J. Schaid ◽  
Shannon K. McDonnell ◽  
Michael L. Blute ◽  
Stephen N. Thibodeau
Keyword(s):  
Prostate Cancer ◽  
Autosomal Dominant ◽  
Autosomal Dominant Inheritance ◽  
Dominant Inheritance
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