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Effect of short term calorie restriction on pro-inflammatory NF-kB and AP-1 in aged rat kidney

Abstract.

Objective:

To compare the effect of short-term calorie restriction (CR) on aging with that of already known long-term CR, the anti-inflammatory efficacy of 10-day CR was explored in aged rat kidney.

Treatment:

Two different age groups, 6 months (young) and 24 months (old) were used. In the old group, one sub-group was control, fed ad libitum (AL) and the other was fed CR for 10 days with 40 % of the food intake of the AL subgroup (n = 5).

Methods:

Reactive species (RS), lipid peroxides and COX-2 activity were measured. The activities of proinflammatory transcription factors NF-kB and AP-1 were measured by electro-mobility shift assay (EMSA). Upstream signaling cascades of NF-kB and AP-1 as well as proinflammatory gene expression were detected by Western blot.

Results:

10-day CR suppressed RS, lipid peroxides, and COX-2 activity in aged rat kidney. CR also inhibited upstream signaling cascades and DNA binding activity of NF-kB and AP-1, and thioredoxin/Ref-1 pathway. CR blocked expression of NF-kB-and AP-1-responsive gene COX-2, iNOS, VCAM-1 and ICAM-1.

Conclusions:

We report for the first time that 10-day CR can attenuate the altered signaling transduction for inflammatory processes which is mediated through RS-induced NF-kB and AP-1 in aged kidney.

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Correspondence to H. Y. Chung.

Additional information

Received 24 November 2007; returned for revision 18 January 2008; received from final revision 8 July 2008; accepted by M. Katori 16 July 2008

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Jung, K.J., Lee, E.K., Kim, J.Y. et al. Effect of short term calorie restriction on pro-inflammatory NF-kB and AP-1 in aged rat kidney. Inflamm. Res. 58, 143–150 (2009). https://doi.org/10.1007/s00011-008-7227-2

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  • DOI: https://doi.org/10.1007/s00011-008-7227-2

Keywords:

  • Aging
  • Short term calorie restriction
  • Molecular inflammation
  • NF-kB
  • AP-1