Immunogénicité de la Vaccination Anti-pneumococcique (PCV13+PPV23 Versus PREVENAR20) Dans le Lymphome Chez l'Adulte
试验速览
- 阶段
- 4 期
- 状态
- 招募中
- 入组人数
- 160
- 试验地点
- 9
- 主要终点
- Proportion of patients having an immunological response
研究概览
简要总结
The French Public Health Council recommended pneumococcal vaccination combined strategy for all immunocompromised patients in 2012. This strategy consisted in conjugated 13-valent pneumococcal (PCV13) injection followed 2 months later by polysaccharide 23-valent (PPV23) vaccine injection. In 2024, Health authorities changed guidelines to recommend one injection of PREVENAR20 instead of the 2-vaccine scheme general practitioners are usually in charge of this vaccination. Conjugated pneumococcal vaccine enhances the immunogenicity of the polysaccharide vaccine. Acute leukemia and lymphoma are treated with multiple courses of chemotherapy, impairing the immune system and potentially the response to vaccination. These patients are more at risk for developing pneumococcal invasive diseases than the general population. However, efficacy of pneumococcal vaccination is poorly documented in this setting. We assume that 65% of the patients are non-responders to double compared to 45% for PCV20PREVENAR20 vaccination, according to their anti-pneumococcal immunoglobulin G (Ig) titers and the opsonophagocytic activity (OPA). To assess the immunogenicity of the pneumococcal vaccination combined strategy in adult population of acute leukemia and lymphoma, we will measure anti-pneumococcal serotype-specific IgG titers and OPA at different time-points after completion of the combined vaccine strategy. The primary objective is to assess the immunogenicity of pneumococcal vaccination combined strategy at 3 months after the PCV13 injection (corresponding to 1 month after the end of the combined strategy in cohort A) using Ig G titers and OPA, compared to 3 months post PREVENAR20 (cohort B). At different time points (day 0, 4 weeks post PCV13, and 4 weeks, 3-6 months and 9-12 months post PPV23 and in day 0, 4 weeks post PREVENAR20 and 3 months, 5-8 months and 11-14 months post PREVENAR20, the immunological response to vaccination will be monitored using specific-serotype IgG titers, OPA, and total anti-pneumococcal Ig. We will determine predictive factors of non-response to vaccination by comparing demographic data, biological data and treatment received lymphoma patients. The tolerance and safety of the vaccination strategy will also be assessed in this specific hematological population.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Sequential
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patient ≥ 18 year-old.
- •AND medical follow-up in hematology unit
- •AND had received a first course of chemotherapy for diffuse large B cell lymphoma or for follicular lymphoma
- •Life expectancy > 6 months.
- •Negative pregnancy test.
- •Having signed the consent form.
- •Having an health insurance.
排除标准
- •Receiving monoclonal antibodies or biotherapies altering the immune response, other than anti-CD20 antibodies in the chemotherapy protocol.
- •Uncontrolled bacterial, viral or fungal infection less than 7 days.
- •Previous vaccination with PCV13 or PPV23 (unless PCV13 was administered in childhood. The last injection must be performed at least five years ago).
- •Preexisting condition that altered the immune response: splenectomy, HIV, primary or secondary immune deficiency, nephrotic syndrome, sickle cell anemia, autoimmune disorder, solid organ transplantation, immunosuppressive drugs or biotherapy not included in the chemotherapy.
- •Patient who already received chemotherapy for malignancy in the previous 2 years before the inclusion.
- •Major blood clotting disorders preventing intramuscular injection.
- •Medical history of anaphylactic reaction to vaccination.
- •Known allergy to one of the vaccine components.
- •Involvement to another vaccine biomedical research.
- •Protected person.
- •Pregnant women or women of childbearing age without appropriate contraceptive measures.
- •Perfusion of polyvalent immunoglobulins during follow-up.
- •Participants with hypersensitivity to aluminum phosphate, phenol or CRM197 protein, protein derived from Corynebacterium diphtheria.
研究组 & 干预措施
Cohort study A
80 patients already included in study cohort A. They received an injection of 13-valent conjugate vaccine (PCV13), followed by an injection of 23-valent polysaccharide vaccine (PPV23) at least 2 months later.
干预措施: Prevenar 13 + Pneumovax 23 (Biological)
Cohort study B
80 patients to be included in study cohort B. They will receive a single injection of PREVENAR20 vaccine.
干预措施: PREVENAR20 (Biological)
结局指标
主要结局
Proportion of patients having an immunological response
时间窗: 4 weeks after the end of the combined strategy for cohort study A and 3 months post injection for cohort study B
Proportion of patients having an immunological response to combined strategy at 4 weeks after the end of the combined strategy compared to proportion of patients having an immunologicalresponse at 3 months post PREVENAR20 injection. An immunological response to vaccination is defined by 7/10 tested serotypes responding to these 4 criteria: a serotype-specific IgG titer ≥ 1,3 μg/mL (WHO threshold), a two-fold increase of this IgG titer compare to baseline before vaccination, a serotype-specific OPA ≥1/8, and a four-fold increase of functional antibodies compare to baseline.
次要结局
- Proportion of patients having an ELISA serotype-specific IgG titer and a two-fold increase of this IgG titer(4 weeks after injection)
- Proportion of patients having a sustainable response to vaccination(9-12 months after the PPV23 injection or 11-14 months post PREVENAR20.)
- Proportion of responding patients having titers of IgG, IgG2, IgM, and IgA rising significantly(4 weeks after PCV13 or PREVENAR20 injection, and 4 weeks, 3-6 months and 9-12 months after PPV23 injection versus respectively 3 months, 5-8 months and 11-14 months after PREVENAR20 injection.)
- Predictive factors for non-response to vaccination(4 weeks, and 9-12 months after PPV23 versus respectively 3 months and 11-14 months after PREVENAR20 injection)
- Local or general reactions to vaccination and invasive pneumococcal infections(14 months)
- Concordance between the reference immuno-monitoring dosage and another kit of dosage(14 months)