Track topics on Twitter Track topics that are important to you
- A number of rare inherited diseases affect only a few patients, and the genetic causes of these conditions remain unknown. Researchers are studying the use of a new technology called whole genome sequencing to learn which gene or genes cause these conditions. Understanding the genes that cause these diseases is important to improve diagnosis and treatment of affected patients.
- To identify the genetic cause of disorders that are difficult to identify with existing techniques.
- To develop best practices for the medical and counseling challenges of whole genome sequencing.
- Individuals who have one of the rare disorders under consideration in this study. These conditions are generally those in which the genetic cause of the disorder is unknown. The eligibility of most individual participants will be decided on a case-by-case basis by the researchers.
- Family members of affected individuals, if that family member (often a parent) may provide genetic information.
- Participants in this study will have at least one and in some cases several of the following procedures:
- A medical genetics evaluation.
- Other tests that may include x-rays, magnetic resonance imaging (MRI) exams, and consultations with other doctors. Not all studies are necessary for each person, but the information from the tests may be required to proceed with some of our gene sequencing studies.
- Clinical photographs to document certain aspects of the disorder.
- Blood and skin biopsy samples, or other tissue samples, as required by the study doctors.
- Genetic testing, as decided by the researchers. However, most participants in this study can expect to undergo whole genome sequencing, which is a technique to study all of a person's genes.
- Some participants may be asked to take part in a telephone interview and/or a web-based survey.
- Participants will have choices about what kinds of results from whole genome sequencing they wish to learn.
- After the tests have been completed and the results of the genetic studies are known, participants will be offered a return visit to the National Institutes of Health to learn these results. During this visit, participants will be asked to complete surveys and participate in interviews related to their decisions to participate in the study and to learn individual genetic test results.
We aim to use whole-genome medical sequencing (WGMS) to discover causative molecular lesions for a set of rare, severe phenotypes hypothesized to be caused by either somatic mutations, germline de novo heterozygous mutations, germline inherited recessive, or germline inherited dominant mutations in currently unknown or uncharacterized genes. The goal of this research is threefold: to identify causative sequence variants for disorders whose molecular etiology was previously unknown, to apply this insight to both the rare disorders under study and more common phenotypes, and to enhance the study of mutation on a genome-wide level.
We plan to recruit approximately three to six affected individuals along with both parents for each phenotype under study. Prospectively recruited trios will be brought to the NIH Clinical Center for brief clinical evaluations and molecular evaluation. Each trio will be consented to whole genome sequencing with the option to learn clinically relevant results, that is, those that explain the disorder in question (what we refer to as the primary variant') as well as other clinically relevant findings discovered incidentally as part of the WGMS process (what we refer to as secondary variants ). Participants will be offered a return visit to NIH to learn these results, and will be asked to complete surveys and participate in interviews related to their decisions about participation in the study and to learn individual genotype results.
The NIH Intramural Sequencing Center (NISC) will screen for sequence variants that conform to the hypothesized inheritance pattern. These variants will be validated, for example by using trios for de novo phenotypes, or with additional cases. We have started developing analytic algorithms to distinguish potentially pathogenic genetic alterations from normal variation. All sequence variants deemed clinically relevant will be validated in a CLIA-certified laboratory and the results returned to that participant, should they choose to learn these findings. This protocol is being designed in a way that will provide the long-term potential for pursuing many different clinical projects.
Time Perspective: Prospective
Multiple Congenital Anomaly Syndromes
National Institutes of Health Clinical Center, 9000 Rockville Pike
National Institutes of Health Clinical Center (CC)
Published on BioPortfolio: 2014-08-27T03:15:12-0400
Non-conspicuous penis (congenital megaprepuce, occult penis) is a symptomatic malformation that includes phimosis and excessively baggy, urine-filled prepuce with alteration of the appeara...
This randomized, double-blind, controlled, outpatient two-period, two-treatment crossover study is designed to evaluate the efficacy and safety of amifampridine phosphate in patients (ages...
This study will investigate Ebstein's anomaly, a congenital abnormality of the tricuspid valve of the heart and try to identify the genetic origins of the disease. Adults and children 2 y...
The objective of this study is to determine the safety and feasibility of autologous mononuclear cells (MNS) collected from bone marrow (BM) and using an add-on intramyocardial delivery fo...
Laryngomalacia is the most common congenital laryngeal anomaly and the most frequent cause of stridor in infants and children. Symptoms usually appear within the first 2 weeks of life. Its...
Recent studies have indicated that birth weight to placental weight (BW/PW) ratio is related to perinatal outcomes, but the effect of congenital abnormalities on BW/PW ratio remains unclear. We perfor...
Congenital myasthenia syndromes are clinically and genetically heterogeneous but treatable conditions. Careful selection of drug therapy is paramount as the same drug can be effective, ineffective, an...
Duplicated ureter or Duplex Collecting System is a congenital condition in which the ureteric bud, the embryological origin of the ureter, arises twice, resulting in two ureters draining a single kidn...
To investigate the diagnostic challenges of congenital myasthenic syndromes (CMS) in adult neuromuscular practice.
Congenital myasthenic syndromes are a group of genetically determined rare diseases resulting from ultrastructural alterations in synaptic proteins. Up to 32 genes are known to be involved in those sy...
Small circumscribed melanoses resembling, but differing histologically from, freckles. The concept includes senile lentigo ('liver spots') and nevoid lentigo (nevus spilus, lentigo simplex) and may also occur in association with multiple congenital defects or congenital syndromes (e.g., Peutz-Jeghers syndrome).
Congenital anomaly of abnormally short fingers or toes.
Congenital or developmental anomaly in which the eyeballs are abnormally small.
A congenital anomaly of the hand or foot, marked by the presence of supernumerary digits.
Congenital anomaly in which some of the structures of the eye are absent due to incomplete fusion of the fetal intraocular fissure during gestation.
Bioinformatics is the application of computer software and hardware to the management of biological data to create useful information. Computers are used to gather, store, analyze and integrate biological and genetic information which can then be applied...
DNA sequencing is the process of determining the precise order of nucleotides within a DNA molecule. During DNA sequencing, the bases of a small fragment of DNA are sequentially identified from signals emitted as each fragment is re-synthesized from a ...
Radiology is the branch of medicine that studies imaging of the body; X-ray (basic, angiography, barium swallows), ultrasound, MRI, CT and PET. These imaging techniques can be used to diagnose, but also to treat a range of conditions, by allowing visuali...