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[Genomic alterations in preneoplastic lesions].

Akihiko Gemma1

  • 14th Department of Internal Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan.

Gan to Kagaku Ryoho. Cancer & Chemotherapy
|January 1, 2003
PubMed
Summary

Genomic alterations in preneoplastic lesions, including gene deletions and mutations, are key indicators of early cancer development. Understanding these changes aids in cancer prevention and early detection strategies.

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Area of Science:

  • Genomics
  • Oncology
  • Molecular Biology

Context:

  • Preneoplastic lesions represent early stages of cancer development.
  • Genomic alterations are crucial events in tumorigenesis.
  • This review synthesizes findings on genetic changes in preneoplastic tissues.

Purpose:

  • To summarize genomic alterations observed in various preneoplastic lesions.
  • To highlight common genetic changes associated with precancerous conditions.
  • To underscore the role of genomic instability in cancer initiation.

Summary:

  • Common deletions include 3p, 9p (lung, bladder), 8p (prostate), 1p/19q (oligodendroglioma), and 22q (meningioma).
  • Somatic mutations of p53 occur in preneoplastic lesions of the esophagus, stomach, colon, thyroid, and astrocytoma.
  • Specific gene alterations (APC, ras, p53, LKB1, Smad4, DNA mismatch repair genes, VHL, WT1, RB, ret) are linked to hereditary and sporadic cancers.
  • Viral infections (HPV, Hepatitis B) contribute to precancerous conditions.
  • Genomic instability, APC, K-ras, and p16 alterations are found in stomach and pancreatic preneoplasia.

Impact:

  • Advances in understanding genomic alterations can improve cancer prevention strategies.
  • Identifying these genetic changes facilitates early cancer detection.
  • This knowledge contributes to developing targeted therapies for precancerous conditions.

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