Related Experiment Video
Updated: Jul 31, 2026
07:34
Fetal Mouse Cardiovascular Imaging Using a High-frequency Ultrasound (30/45MHZ) System
Published on: May 5, 2018
[Williams syndrome without cardiovascular abnormalities].
P Cincinnati1, M Genuardi, C Rutiloni
1Sezione Autonoma di Pediatria, Ospedale E. de Santis, Genzano, Roma.
Minerva Pediatrica
|April 20, 1999
Summary
Williams Syndrome (WS) diagnosis is confirmed by elastin gene hemizygosity. However, the absence of cardiovascular defects in some patients suggests other genetic factors beyond hemizygosity are involved.
Area of Science:
- Genetics
- Molecular Biology
- Developmental Biology
Background:
- Williams Syndrome (WS) is a genetic disorder characterized by specific facial features, growth deficiency, and intellectual disability.
- Cardiovascular pathology in WS is traditionally attributed to elastin gene hemizygosity leading to inelastic vessels.
- The elastin gene is crucial for vascular integrity and function.
Observation:
- A patient with typical WS features (dysmorphic traits, growth deficiency, mental retardation) but no cardiovascular anomalies was diagnosed with WS.
- FISH analysis confirmed hemizygosity at the elastin locus in this patient.
- This case challenges the direct correlation between elastin hemizygosity and cardiovascular defects in WS.
Findings:
- The presence of WS without cardiovascular anomalies indicates that factors beyond elastin gene hemizygosity influence WS-related cardiovascular pathology.
- Transcriptional regulation of elastin gene expression may play a role.
- Other genes within the commonly deleted 7q11.23 region could contribute to cardiovascular defects.
Implications:
- Further investigation into the genetic regulation of elastin and other genes in the 7q11.23 region is necessary for a comprehensive understanding of WS.
- Clinical studies are needed to characterize patients with partial WS phenotypes and varying degrees of tissue damage.
- This research may lead to more targeted diagnostic and therapeutic strategies for Williams Syndrome.
More Related Videos
Related Concept Videos
01:33Pleiotropy
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
01:29Cardiovascular System Abnormal Findings I: Inspection and Palpation
In a cardiovascular examination, inspection and palpation are crucial for identifying abnormalities.
Abnormal findings observed during an inspection
Abnormal findings observed during an inspection
01:25Cardiovascular System Abnormal Findings II: Auscultation
Auscultation, an essential part of a heart examination, is done using a stethoscope. It provides crucial information about heart function and possible heart problems. Due to heart problems, abnormal sounds can be heard during systole or diastole. These sounds include S3 and S4 gallops, opening snaps, systolic clicks, and murmurs.
Abnormal Heart Sounds
Gallops:
Abnormal Heart Sounds
Gallops:
01:23Mitral Stenosis II: Clinical features and Diagnostic Tests
Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
01:30Coronary Artery Disease III: Clinical Manifestations
Coronary Artery Disease (CAD) is a primary health risk worldwide, leading to significant morbidity and mortality. The condition arises from the buildup of atherosclerotic plaques within the coronary arteries, resulting in diminished blood supply to the heart muscle.The clinical manifestations of CAD vary widely, from asymptomatic stages to severe, life-threatening conditions. Understanding these manifestations is crucial for early diagnosis and effective management.Angina Pectoris: The Warning...
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...