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Related Experiment Videos

X-linked laterality sequence: situs inversus, complex cardiac defects, splenic defects.

R S Mathias1, R V Lacro, K L Jones

  • 1Department of Pediatrics, University of California, San Diego.

American Journal of Medical Genetics
|September 1, 1987
PubMed
Summary

This study identifies a rare genetic disorder affecting spleen development, heart defects, and organ positioning. It documents the first family with X-linked recessive inheritance of this complex developmental defect.

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Area of Science:

  • Developmental biology
  • Human genetics
  • Medical science

Background:

  • The association of abdominal situs inversus, complex cardiac defects, and splenic anomalies defines a developmental field complex.
  • This complex exhibits variable expression of altered laterality.
  • Previous familial cases have suggested autosomal recessive and dominant inheritance patterns.

Observation:

  • This report details the first documented family exhibiting X-linked recessive inheritance of this developmental defect.
  • The family presented with a combination of abdominal situs inversus, complex cardiac anomalies, and spleen development alterations.
  • Genetic analysis confirmed the inheritance pattern within the family.

Findings:

  • X-linked recessive inheritance is a newly identified mode for this developmental field complex.

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  • The findings expand the known genetic basis of laterality disorders.
  • This specific family's presentation highlights the phenotypic variability.

    • Implications:

    • Understanding the genetic basis of laterality defects is crucial for diagnosis and genetic counseling.
    • Identification of X-linked inheritance opens new avenues for research into the underlying genes and pathways.
    • This discovery aids in comprehending the etiology of complex congenital anomalies.