23-valent Polysaccharide Pneumococcal Vaccine in Juvenile Idiopathic Arthritis Patients Under Anti-TNF Therapy

Short and Long-term Immunogenicity and Safety Following the 23-valent Polysaccharide Pneumococcal Vaccine in Juvenile Idiopathic Arthritis Patients Under Anti-TNF Therapy

Objectives: To assess immunogenicity and safety of the 23-valent polysaccharide pneumococcal vaccine (PPV23) in JIA patients with and without anti-TNF therapy. The influences of demographic data, disease activity and treatment on immune response and the potential deleterious effect of vaccine on disease itself were also evaluated.

Methods: 17 JIA patients immediately pre-etanercept (Group 1) and 10 JIA patients on stable dose of methotrexate (Group 2) will receive one dose of PPV23. All patients will be evaluated pre-vaccination, 2 months and 12 months post-vaccination for seven pneumoccocal serotypes. Serology will be performed by enzyme immunoassay and the immunogenicity endpoints will include seroprotection (SP), seroconversion (SP) and geometric mean concentration of antibodies (GMC). Clinical and laboratorial parameters of JIA will be evaluated before and after vaccination.

Study Overview

• Status: Completed
• Conditions: Juvenile Idiopathic Arthritis
• Intervention / Treatment: Biological: anti-TNF

Detailed Description

Seventeen JIA patients (International League Against Rheumatism criteria) followed at the Pediatric Rheumatology Unit of Children's Institute of Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo and who are refractory to methotrexate [median dose 0.9 mg/kg/week (0.7 - 1)] will be included immediately before the association of anti-TNF (etanercept 0.8 mg/kg/week, Group 1) to the previous therapy. The control group (Group 2) consist of 10 JIA patients on stable dose of methotrexate [median dose 0.8 mg/kg/week (0.3-1.0)]. One intramuscular dose of PPV23 (Sanofi Pasteur), lot B0381-3, at the immunization center of the same hospital will be given to each study subject.

Participants are ≥ 5 and ≤ 18 years old and patients with previous vaccination against S. pneumoniae will be excluded. This study was approved by the Local Ethical Committee of our University Hospital and an informed consent was obtained from all participants or their legal guardians.

Vaccine immunogenicity Blood samples will be collected pre-vaccination, 2 months and 12 months post-vaccination for 7 pneumoccocal serotypes (4, 6B, 9V, 14, 18C, 19F, 23F). Samples will be centrifuged and serum will be frozen and stored at -70 ◦C until tested. In order to eliminate non-specific antibodies that may exhibit cross-reactivity, the samples will be pre-absorbed with the C-polysaccharide and with the heterologous serotype 22F.

Serology for each serotype will be performed by enzyme immunoassay and immunogenicity endpoints will include seroprotection rate (SP) (percentage of subjects achieving antibodies titers ≥1.3 micrograms/mL), seroconversion rate (SC) (percentage of subjects with a minimum of 2-fold rise in post-vaccination antibodies titers) and the geometric mean concentration of antibodies (GMC). Adequate vaccine response will be considered when SC occur for at least 50% of all seven vaccine serotypes.

During the period of one year after PPV23 vaccination, all upper and lower respiratory tract infections will be weekly recorded during clinical appointments.

Safety: The number of participants with local and systemic adverse events will be assessed as a measure of safety and tolerability. Local reactions were considered to be related to the PPV23, while systemic adverse events were analyzed individually to determine their causality. Severe adverse events were defined as those requiring hospitalization or death.

Clinical, laboratorial and therapy assessment: All patients will be evaluated on the day of vaccination, 2 months and 12 months after immunization for clinical and laboratorial parameters: number of active joints (swelling within a joint, or limitation in the range of joint movement with joint pain or tenderness), number of limited joints, morning stiffness, patient and physician global assessment of arthritis activity measured with pain scores on the Visual Analog Scale" (VAS) and validated Brazilian version of Childhood Health Assessment Questionnaire (CHAQ). Erythrocyte sedimentation rate (ESR) was evaluated according to Westergreen method and C-reactive protein (CRP) according to nephelometry. The Juvenile Arthritis Disease Activity Score with 27-joint reduced count (JADAS-27), defined as the linear sum of the scores of 4 components [physician global assessment of disease activity (measured on a 10-cm VAS), parent/patient global assessment of well-being (measured on a 10-cm VAS); number of active joints (0-27 joints); and ESR] (range: 0 - 57 points), will be calculated in all JIA patients. Current concomitant treatment with non-steroidal anti-inflammatory drug, prednisone, methotrexate, leflunomide and cyclosporine will be evaluated.

Statistical analysis: Immunogenicity and safety analyses will be descriptive and data will be presented as number (%) or median (range). The GMCs will be compared between JIA patients with and without anti-TNF therapy using a two-sided Student's t-test or Mann-Whitney U-test on the log10-transformed titers. The prospective analysis of GMCs for each of seven pneumococcal serotypes will be performed by Friedman Repeated Measures ANOVA on Ranks. Categorical variables (rates of seroprotection and seroconversion, prednisone and immunosuppressive drugs use) will be compared using Fisher's exact test. The prospective analysis of seroprotection and seroconversion rates for each of seven pneumococcal serotypes will be performed by McNemar's Test. The effects before and after vaccination on disease activity will be analyzed with the Wilcoxon signed ranks test. The statistical significance was set at p value < 0.05.

• Study Type: Interventional
• Enrollment (Actual): 27
• Phase: Phase 4

Contacts and Locations

Study Locations

• Brazil
  • Sao Paulo, Brazil, 01246-903
    • Centro de Dispensação de Medicamentos de Alto Custo (CEDMAC)

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 5 years to 18 years (Child, Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Juvenile idiopathic arthritis criteria (International League Against Rheumatism criteria)
• ≥ 5 and ≤ 18 years old

Exclusion Criteria:

• Previous vaccination against S. pneumoniae

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Prevention
• Allocation: Non-Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
No Intervention: Methotrexate; JIA patients on stable dose of methotrexate vaccinated with PPV23
Experimental: anti-TNF; JIA patients refractory to methotrexate immediately before the association of anti-TNF vaccinated with PPV23	Biological: anti-TNF; Anti-tumor necrosis factor therapy

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Seroprotection rate	Sseroprotection rate (SP): percentage of subjects achieving antibodies titers ≥1.3 micrograms/mL	2 months after vacccination
Seroconversion rate	Seroconversion rate (SC): percentage of subjects with a minimum of 2-fold rise in post-vaccination antibodies titers	2 months after vaccination
Number of participants with local and systemic adverse events	Local reactions were considered to be related to the PPV23, while systemic adverse events were analyzed individually to determine their causality. Severe adverse events were defined as those requiring hospitalization or death.	Until 12 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Seroprotection rate	Seroprotection rate (SP): percentage of subjects achieving antibodies titers ≥1.3 micrograms/mL	12 months after vaccination
Seroconversion rate	Seroconversion rate (SC): percentage of subjects with a minimum of 2-fold rise in post-vaccination antibodies titers	12 months after vaccination
Juvenile Arthritis Disease Activity Score with 27-joint reduced count (JADAS-27)	The Juvenile Arthritis Disease Activity Score with 27-joint reduced count (JADAS-27) is defined as the linear sum of the scores of 4 components [physician global assessment of disease activity (measured on a 10-cm VAS), parent/patient global assessment of well-being (measured on a 10-cm VAS); number of active joints (0-27 joints); and ESR] (range: 0 - 57 points)	2 months after vaccination
Juvenile Arthritis Disease Activity Score with 27-joint reduced count (JADAS-27)	The Juvenile Arthritis Disease Activity Score with 27-joint reduced count (JADAS-27) is defined as the linear sum of the scores of 4 components [physician global assessment of disease activity (measured on a 10-cm VAS), parent/patient global assessment of well-being (measured on a 10-cm VAS); number of active joints (0-27 joints); and ESR] (range: 0 - 57 points)	12 months after vaccination

Collaborators and Investigators

• Sponsor: University of Sao Paulo
• Investigators: Principal Investigator: Nadia E Aikawa, MD, PhD, University of Sao Paulo

Study record dates

Study Major Dates

• Study Start: January 1, 2008
• Primary Completion (Actual): June 1, 2011
• Study Completion (Actual): June 1, 2012

Study Registration Dates

• First Submitted: July 16, 2014
• First Submitted That Met QC Criteria: July 18, 2014
• First Posted (Estimate): July 22, 2014

Study Record Updates

• Last Update Posted (Estimate): July 22, 2014
• Last Update Submitted That Met QC Criteria: July 18, 2014
• Last Verified: July 1, 2014

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Immune System Diseases; Autoimmune Diseases; Joint Diseases; Musculoskeletal Diseases; Rheumatic Diseases; Connective Tissue Diseases; Arthritis; Arthritis, Juvenile
• Other Study ID Numbers: PPV23JIA-aTNF