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Human rDNA and Cancer.

Evgeny Smirnov1, Nikola Chmúrčiaková1, Dušan Cmarko1

  • 1Laboratory of Cell Biology, Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, 128 01 Prague, Czech Republic.

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Summary
This summary is machine-generated.

The human ribosomal DNA (rDNA) locus is a fragile genomic site prone to instability and cancer. Non-coding RNAs within rDNA regulate its activity, implicating it in carcinogenesis and potential therapies.

Keywords:
IGScancercopy numberhuman rDNAnon-coding RNAribosomal genes

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Area of Science:

  • Genetics
  • Molecular Biology
  • Cancer Research

Background:

  • Human ribosomal DNA (rDNA) comprises a ribosomal part (~13 kb) and an intergenic spacer (IGS, ~30 kb).
  • rDNA is a repetitive, highly transcribed, and methylated genomic region, making it fragile and susceptible to instability.
  • rDNA instability, mutations, and altered transcription are linked to cancer development.

Purpose of the Study:

  • To review the role of the human rDNA locus in carcinogenesis.
  • To examine how rDNA structure variability contributes to malignant transformation.
  • To explore therapeutic strategies targeting rDNA activity.

Main Methods:

  • Literature review of studies on human rDNA.
  • Analysis of data on rDNA structure, function, and non-coding RNA production.
  • Examination of the link between rDNA alterations and cancer pathways.

Main Results:

  • The rDNA locus contains functional regions producing non-coding RNAs involved in RNA polymerase I (pol I) regulation.
  • These non-coding RNAs influence stress responses and malignant phenotype development.
  • rDNA locus alterations are implicated as both targets and drivers in carcinogenesis.

Conclusions:

  • The human rDNA locus plays a crucial role in carcinogenesis.
  • Variability in rDNA structure may be a factor in malignant transformation.
  • Targeting rDNA activity presents potential therapeutic avenues for cancer treatment.