Primary Outcome Measures:
- Proportion of responders for more than 5 serotypes among the 7 serotypes common between conjugate and Poly Saccharidic vaccines (ie. serotypes 4, 6B, 9V, 14, 18C, 19F and 23F). [ Time Frame: 31 months ] [ Designated as safety issue: Yes ]
Secondary Outcome Measures:
- Proportion of patients presenting a disease exacerbation(defined as an increase of ³3 points on the SLEDAI score and/or need to increase treatment with corticosteroids or immunosuppressive drugs) during the 12 months following the first vaccination [ Time Frame: 55 months ] [ Designated as safety issue: Yes ]
- Proportion of patients with local or systemic reactions following vaccination [ Time Frame: 55 months ] [ Designated as safety issue: Yes ]
- Comparison of serum antibodies titers obtained at W28 for each of the tested serotypes [ Time Frame: 55 months ] [ Designated as safety issue: Yes ]
- Comparison of ELISA persistent responses six months and 2 years after vaccination with Pneumo23® (M12 and M30) [ Time Frame: 55 months ] [ Designated as safety issue: Yes ]
- Research of predictive factors of immunological response disease activity at M0 (defined by SLEDAI), SLE treatment and others variables witch can affect the response. [ Time Frame: 55 months ] [ Designated as safety issue: Yes ]
Infections are more frequent and potentially more serious in patients with SLE compared to healthy subjects. This risk increases when patients are treated with corticosteroids and/or immunosuppressive drugs.Among serious infections which can happen in this context, respiratory infections are among the most frequent and Streptococcus pneumoniae is one of the most often responsible germs.Although there are no specific study in SLE, these findings indicate that patients with SLE could benefit from a preventive vaccination against pneumococcal infections.Two pneumococcal vaccines are available: Pneumo23®, a Poly Saccharidic vaccine indicated for adults and children > 2 years at risk of pneumococcal infections; and Prevenar®, a conjugate vaccine, indicated for children < 2 years.Pneumo23® has been found to be safe in SLE but less immunogenic than in general population.Prevenar® has already been studied in immunocompromised patients (HIV-infected patients, patients after renal transplantation). It has been shown that immunological efficacy is better when Prevenar® is administrated prior to Pneumo23®, compared to Pneumo23® administrated alone.To our knowledge, this prime-boost strategy has not been assessed in patients with SLEThe primary objective of the study is to compare immunological efficacy of two pneumococcal vaccination strategies in patients with systemic lupus erythematosus (SLE) treated with corticosteroids associated or not with other immunosuppressive drugs : 1) Vaccination with conjugate vaccine (Prevenar®) at week 0 and Poly Saccharidic vaccine (Pneumo23®) after 6 months (W24)2) Vaccination with placebo at W0 and Poly Saccharidic vaccine (Pneumo23®) at W24Secondary objectives are:
- To compare the clinical and biological tolerance of the two vaccinal strategies·
- To evaluate the durability of sero protection at 6 and 24 months after vaccination by Pneumo23®
- To search predictive factors determinant of the pneumococcal vaccine response