Cyclin-dependent kinase inhibition limits glomerulonephritis and extends lifespan of mice with systemic lupus

Carla Zoja, Federica Casiraghi, Sara Conti, Daniela Corna, Daniela Rottoli, Regiane A. Cavinato, Giuseppe Remuzzi, Ariela Benigni

Research output: Contribution to journalArticlepeer-review


Objective. To examine whether the cyclin-dependent kinase (CDK) inhibitor seliciclib ameliorates autoimmune nephritis in (NZB x NZW)F1 mice. Methods. In experiment 1, NZB x NZW mice received seliciclib (100 mg/kg or 200 mg/kg) or vehicle by gavage, beginning at age 2 months and ending at 8 months of age. In experiment 2, seliciclib (200 mg/kg) was administered alone or combined with low-dose methylprednisolone, starting at age 5 months, when immune complex deposition in the kidney had already occurred. Animals were followed up until all vehicle-treated mice died. In 2 additional groups of NZB x NZW mice treated with seliciclib or vehicle from 2 months of age until 5 months of age, splenocytes were isolated and tested ex vivo for T cell and B cell activity. Results. Seliciclib, given at an early phase of disease, prolonged survival, delayed the onset of proteinuria and renal function impairment, and protected the kidney against glomerular hypercellularity, tubulointerstitial damage, and inflammation. Combining seliciclib with low-dose methylprednisolone in mice with established disease extended the lifespan and limited proteinuria and renal damage more than treatment with either agent alone. Seliciclib limited immunologic signs of disease, reducing glomerular IgG and C3 deposits and levels of serum anti-DNA antibodies. Moreover, it inhibited ex vivo T cell and B cell proliferative responses to polyclonal stimuli. T cell production of interferon-γ and interleukin-10 and B cell release of IgG2a were reduced by treatment with seliciclib. Conclusion. These findings suggest that CDK activity may be a useful target in the treatment of systemic lupus erythematosus. A direct immunomodulatory action of seliciclib on T cells and B cells may be one of the mechanisms underlying the beneficial effects.

Original languageEnglish
Pages (from-to)1629-1637
Number of pages9
JournalArthritis and Rheumatism
Issue number5
Publication statusPublished - May 2007

ASJC Scopus subject areas

  • Immunology
  • Rheumatology


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