Modulation of X-ray-induced damage recognition and repair in ageing human peripheral blood mononuclear cells by an interleukin-6-type cytokine

Daniela Frasca, Paola Barattini, Grazia Tocchi, Francesco Guidi, Salvatore Scarpaci, Luisa Guidi, Carlo Bartoloni, Andrea Errani, Mario Costanzo, Gino Doria

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We have investigated the effects of an interleukin (IL)-6-type cytokine on the DNA-binding activity of ku and on unscheduled DNA repair in X-ray-treated peripheral blood mononuclear cells (PBMC) from human subjects of different ages. The cytokine used, called K-7/D-6, is an IL-6 variant with increased in vivo and in vitro biological activity compared to the wild type molecule. Ku is the DNA-binding component of the DNA-dependent protein kinase (DNA-PK). It binds the ends of various types of DNA discontinuity and is involved in the repair of DNA breaks caused by V(D)J recombination, isotype switching, physiological oxidation reactions, ionizing radiation and some chemotherapeutic drugs. The ku-dependent repair process, called non-homologous end joining, is the main DNA double strand break repair mechanism in irradiated mammalian cells. Results show that K-7/D-6 significantly increases DNA-binding activity of ku in irradiated PBMC from young but not from elderly subjects. However, K-7/D-6 is able to induce unscheduled DNA repair in irradiated PBMC from both young and elderly subjects. These effects of K-7/D-6 are relevant to the mechanisms of the cellular response to DNA damage.

Original languageEnglish
Pages (from-to)5-19
Number of pages15
JournalMechanisms of Ageing and Development
Volume121
Issue number1-3
DOIs
StatePublished - Jan 20 2001
Externally publishedYes

Fingerprint

Interleukin-6
Blood Cells
Repair
Blood
Aging of materials
Modulation
X-Rays
Cytokines
X rays
DNA
DNA Repair
DNA-Activated Protein Kinase
V(D)J Recombination
Immunoglobulin Class Switching
DNA Breaks
Double-Stranded DNA Breaks
Ionizing Radiation
DNA Damage
Ionizing radiation
Pharmaceutical Preparations

Keywords

  • Ageing
  • DNA repair
  • Ku protein

ASJC Scopus subject areas

  • Aging
  • Biochemistry
  • Developmental Biology
  • Developmental Neuroscience

Cite this

Modulation of X-ray-induced damage recognition and repair in ageing human peripheral blood mononuclear cells by an interleukin-6-type cytokine. / Frasca, Daniela; Barattini, Paola; Tocchi, Grazia; Guidi, Francesco; Scarpaci, Salvatore; Guidi, Luisa; Bartoloni, Carlo; Errani, Andrea; Costanzo, Mario; Doria, Gino.

In: Mechanisms of Ageing and Development, Vol. 121, No. 1-3, 20.01.2001, p. 5-19.

Research output: Contribution to journalArticle

Frasca, Daniela ; Barattini, Paola ; Tocchi, Grazia ; Guidi, Francesco ; Scarpaci, Salvatore ; Guidi, Luisa ; Bartoloni, Carlo ; Errani, Andrea ; Costanzo, Mario ; Doria, Gino. / Modulation of X-ray-induced damage recognition and repair in ageing human peripheral blood mononuclear cells by an interleukin-6-type cytokine. In: Mechanisms of Ageing and Development. 2001 ; Vol. 121, No. 1-3. pp. 5-19.
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