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A polymorphic DNA marker genetically linked to congenital malformations.

T Moriuchi1, S Awataguchi, Y Taniguchi

  • 1Department of Cell Biology, Tokai University School of Medicine, Isehara, Japan.

Nucleic Acids Symposium Series
|January 1, 1989
PubMed
Summary

Researchers identified unusual DNA fragments in congenital malformation cases using a PCNA probe. A linked locus near the PCNA gene on chromosome 2 may be associated with these birth defects.

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Area of Science:

  • Genetics
  • Molecular Biology
  • Developmental Biology

Background:

  • Congenital malformations are complex birth defects with diverse genetic causes.
  • Proliferating Cell Nuclear Antigen (PCNA) is crucial for DNA replication and repair.

Purpose of the Study:

  • To investigate the genetic linkage of PCNA and its surrounding regions to congenital malformations.
  • To identify specific DNA markers associated with congenital malformation development.

Main Methods:

  • DNA blot hybridization using a PCNA probe.
  • Chromosomal in situ hybridization to localize the PCNA gene.
  • Restriction Fragment Length Polymorphism (RFLP) analysis with a 2q33-36 DNA probe.

Main Results:

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  • Unusual DNA fragments were detected with the PCNA probe in one of seven congenital malformation cases.
  • The PCNA gene was localized to human chromosome 2q31-35.
  • RFLP analysis revealed altered fragment patterns (absence of 2.1-kb or 1.7-kb bands) in six of seven congenital malformation cases using the 2q33-36 probe.

Conclusions:

  • A locus closely linked to congenital malformations is located near the PCNA gene on chromosome 2.
  • Specific RFLPs in the 2q33-36 region may serve as markers for certain congenital malformations.