Japanese EncephalitisNCT02602652
Immunogenicity of a JE-CV as a Booster Dose After a Primary Vaccination With SA14-14-2 Vaccine
A study testing a live attenuated chimeric JE vaccine in people with Japanese Encephalitis, run by Chulalongkorn University.
Trial summary
The objective of this study is to measured the Geometric mean titer (GMT) of Japanese Encephalitis neutralizing antibody and proportion of seroprotection among the children who received a booster dose of JE-CV after the first dose of SA14-14-2 vaccine. Read more about this study
- Who is it for?
- Ages 1 year to 5 yearsHealthy volunteers can take part
- Conditions the study is for
- Japanese Encephalitis
- What is being tested?
- a live attenuated chimeric JE vaccine
- Type of treatment
- Vaccines, Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 50 participants
- Where
- No sites listed yet
- Study dates
- Dec 2013to Jul 2015
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 1 year to 5 years
- All sexes
- Healthy volunteers accepted
- Child
Who may be able to join
- 1 Children aged 1 to <5 years on the day of inclusion
- 2. History of received 1 dose of SA14-14-2 vaccine 12-24 months prior to enrollment
- 3. In good general health at the time of inclusion
- 4. Provision of informed consent by the parent(s) or legal guardian(s)
Who cannot join
- Receipt of blood or blood products in the past 3 months.
- Acute febrile illness on the day of vaccination.( BT > 38 C)
About this study
Official title: Immunogenicity of a Japanese Encephalitis Chimeric Virus Vaccine (JE-CV) as a Booster Dose After a Primary Vaccination With SA14-14-2 Vaccine in Thai Children
The objective of this study is to measured the Geometric mean titer (GMT) of Japanese Encephalitis neutralizing antibody and proportion of seroprotection among the children who received a booster dose of JE-CV after the first dose of SA14-14-2 vaccine.
Read the detailed description
Study design: This open label clinical trial in 50 children aged 1-5 years, was conducted at King Chulalongkorn Memorial Hospital in Thailand. The protocol was approved by the Institutional Review Board of Chulalongkorn University, and the study was performed in accordance with Declaration of Helsinki, International Conference on Harmonization Good Clinical Practice, the European Directive 2001/20/EC, and written informed consent was obtained from parents or a legally acceptable representative before enrolment.
Vaccines: JE-CV was manufactured by Sanofi Pasteur Biologics Co., USA., and reconstituted using 0.4% sodium chloride diluent for injection; each dose 0.5 ml contained 4.0-5.8 log10 plaque forming units of virus Serology: JE neutralizing antibody levels were assessed using a PRNT50 assay. The final end point neutralization titer is the inverse of the highest serial dilution of serum that can neutralize ≥ 50% of JE challenge virus. Testing was performed at Focus Diagnostics Inc. using JE-CV as a challenge virus.
Statistical methods: sample size was calculated based on historical data from JE15 study, at month 24 after first dose of JE-CV, the GMT of JE neutralizing antibody was 39.4 (95% CI 33.7 to 46.0) and increase to 2242 (95% CI 1913, 2628) at day 28 post JE-CV booster dose. On the assumption that children who received SA14-14-2 vaccine and subsequently get one booster dose of JE-CV at 12-24 months later will have GMT of at least 1040, with 80% power and alpha 0.05, data at least 43 children need to be collected. When accounted for 15% of children who might loss to follow-up or cannot get adequate blood sample, 50 children should be enrolled.
The per-protocol population will be used for the main immunogenicity analyses. For the main parameters, 95% confidence intervals (CIs) of point estimates will be calculated using the normal approximation for quantitative data and the exact binomial distribution for proportions. The point estimates and their 95% CI of the following will be presented for each group of the Geometric Mean (GM) of neutralizing antibody on D0 and D28 and the percentage of subjects with neutralizing antibody >=10 at D0 and D28
- Conditions
- Japanese Encephalitis
- Being tested
- a live attenuated chimeric JE vaccine
- Keywords
- geometric mean titer, seroprotection, live attenuated chimeric JE vaccine, JE-CV, SA14-14-2 vaccine
- Medical subject headings
- Encephalitis, Japanese
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
a live attenuated chimeric JE vaccineBiological
Also called Japanese Encephalitis Chimeric Virus vaccine
The study included 2 visits (D0 and D28). At the first visit (D0), children were enrolled, collected the blood sample for evaluate the baseline immune status and given a JE-CV as a booster dose. After vaccination, children were observed for 30 minutes to monitor any immediate adverse events. Parents were given a digital thermometer for axillary temperature measurement, a ruler for measuring injection site reactions and a diary card for recording a solicited injection site and systemic reactions.
At the second visit (D28), blood samples were collected for evaluate the immunogenicity.
| Study group | Role | What they receive |
|---|---|---|
| a live attenuated chimeric JE vaccine | Experimental | Children were received JE-CV as a booster dose after vaccinated with SA14-14-2 vaccine as a first dose regimen 12-24 months before. Receives: Biological: a live attenuated chimeric JE vaccine |
What is being measured
The primary outcome is the main question the study is designed to answer.
Changing in geometric mean titer of JE neutralizing antibody at day 0 pre-vaccination and day 28 post vaccination.
Measured: day 0 pre-vaccination and day 28 post vaccination
Secondary outcomes (1)
Proportion of children who had seroprotection at day 0 pre-vaccination and day 28 post vaccination
seroprotection defined as titer ≥10
Measured: day 0 pre-vaccination and day 28 post vaccination
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted11 Nov 2015 (estimated)
- Study startDec 2013
- Primary completionJul 2015
- Study completionJul 2015
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (8)Papers the sponsor has linked to this study.
- Other trials for Japanese EncephalitisStudies of the same condition, open and under way.
- More trials run by Chulalongkorn UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Prevention
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 50 participants (actual)
Sponsor and investigators
- Lead sponsor
- Chulalongkorn University
- Sponsor type
- University, hospital or other
- Collaborators
- Sanofi Pasteur, a Sanofi Company
- Responsible party
- Sponsor
- Investigators
- Pakpoom Janewongwirot, md, Principal investigator, Chulalongkorn University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02602652
- Sponsor's protocol ID
- IRB456/56
- Status last verified
- Jan 2016
- First submitted
- 12 Oct 2015
- Last updated
- 20 Jan 2016
- Results posted
- No
- Data monitoring committee
- Yes
Publications
Feroldi E, Pancharoen C, Kosalaraksa P, Watanaveeradej V, Phirangkul K, Capeding MR, Boaz M, Gailhardou S, Bouckenooghe A. Single-dose, live-attenuated Japanese encephalitis vaccine in children aged 12-18 months: randomized, controlled phase 3 immunogenicity and safety trial. Hum Vaccin Immunother. 2012 Jul;8(7):929-37. doi: 10.4161/hv.20071. Epub 2012 Jul 1.
PubMed 22777096Feroldi E, Capeding MR, Boaz M, Gailhardou S, Meric C, Bouckenooghe A. Memory immune response and safety of a booster dose of Japanese encephalitis chimeric virus vaccine (JE-CV) in JE-CV-primed children. Hum Vaccin Immunother. 2013 Apr;9(4):889-97. doi: 10.4161/hv.23087. Epub 2013 Feb 26.
PubMed 23442823Chokephaibulkit K, Sirivichayakul C, Thisyakorn U, Sabchareon A, Pancharoen C, Bouckenooghe A, Gailhardou S, Boaz M, Feroldi E. Safety and immunogenicity of a single administration of live-attenuated Japanese encephalitis vaccine in previously primed 2- to 5-year-olds and naive 12- to 24-month-olds: multicenter randomized controlled trial. Pediatr Infect Dis J. 2010 Dec;29(12):1111-7. doi: 10.1097/INF.0b013e3181f68e9c.
PubMed 20856164Nasveld PE, Ebringer A, Elmes N, Bennett S, Yoksan S, Aaskov J, McCarthy K, Kanesa-thasan N, Meric C, Reid M. Long term immunity to live attenuated Japanese encephalitis chimeric virus vaccine: randomized, double-blind, 5-year phase II study in healthy adults. Hum Vaccin. 2010 Dec;6(12):1038-46. doi: 10.4161/hv.6.12.13057. Epub 2010 Dec 1.
PubMed 21150279Chotpitayasunondh T, Sohn YM, Yoksan S, Min J, Ohrr H. Immunizing children aged 9 to 15 months with live attenuated SA14-14-2 Japanese encephalitis vaccine in Thailand. J Med Assoc Thai. 2011 Aug;94 Suppl 3:S195-203.
PubMed 22043776Campbell GL, Hills SL, Fischer M, Jacobson JA, Hoke CH, Hombach JM, Marfin AA, Solomon T, Tsai TF, Tsu VD, Ginsburg AS. Estimated global incidence of Japanese encephalitis: a systematic review. Bull World Health Organ. 2011 Oct 1;89(10):766-74, 774A-774E. doi: 10.2471/BLT.10.085233. Epub 2011 Aug 3.
PubMed 22084515Centers for Disease Control and Prevention (CDC). Japanese encephalitis surveillance and immunization--Asia and the Western Pacific, 2012. MMWR Morb Mortal Wkly Rep. 2013 Aug 23;62(33):658-62.
PubMed 23965828Janewongwirot P, Puthanakit T, Anugulruengkitt S, Jantarabenjakul W, Phasomsap C, Chumket S, Yoksan S, Pancharoen C. Immunogenicity of a Japanese encephalitis chimeric virus vaccine as a booster dose after primary vaccination with SA14-14-2 vaccine in Thai children. Vaccine. 2016 Oct 17;34(44):5279-5283. doi: 10.1016/j.vaccine.2016.09.005. Epub 2016 Sep 12.
PubMed 27628323
Study at a glance
From the registry record, last updated by the sponsor on 20 Jan 2016. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Immunogenicity of a Japanese Encephalitis Chimeric Virus Vaccine (JE-CV) as a Booster Dose After a Primary Vaccination With SA14-14-2 Vaccine in Thai Children
- ClinicalTrials.gov ID
- NCT02602652
- Acronym / sponsor ID
- IRB456/56
- Conditions
- Japanese Encephalitis
- Keywords
- geometric mean titer, seroprotection, live attenuated chimeric JE vaccine, JE-CV, SA14-14-2 vaccine
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 50 participants (actual)
- Lead sponsor
- Chulalongkorn UniversityUniversity, hospital or other
- Collaborators
- Sanofi Pasteur, a Sanofi Company
- Study start
- Dec 2013
- Primary completion
- Jul 2015 (actual)
- Study completion
- Jul 2015 (actual)
- First posted
- 11 Nov 2015 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The objective of this study is to measured the Geometric mean titer (GMT) of Japanese Encephalitis neutralizing antibody and proportion of seroprotection among the children who received a booster dose of JE-CV after the first dose of SA14-14-2 vaccine.
Detailed description
Study design: This open label clinical trial in 50 children aged 1-5 years, was conducted at King Chulalongkorn Memorial Hospital in Thailand. The protocol was approved by the Institutional Review Board of Chulalongkorn University, and the study was performed in accordance with Declaration of Helsinki, International Conference on Harmonization Good Clinical Practice, the European Directive 2001/20/EC, and written informed consent was obtained from parents or a legally acceptable representative before enrolment.
Vaccines: JE-CV was manufactured by Sanofi Pasteur Biologics Co., USA., and reconstituted using 0.4% sodium chloride diluent for injection; each dose 0.5 ml contained 4.0-5.8 log10 plaque forming units of virus Serology: JE neutralizing antibody levels were assessed using a PRNT50 assay. The final end point neutralization titer is the inverse of the highest serial dilution of serum that can neutralize ≥ 50% of JE challenge virus. Testing was performed at Focus Diagnostics Inc. using JE-CV as a challenge virus.
Statistical methods: sample size was calculated based on historical data from JE15 study, at month 24 after first dose of JE-CV, the GMT of JE neutralizing antibody was 39.4 (95% CI 33.7 to 46.0) and increase to 2242 (95% CI 1913, 2628) at day 28 post JE-CV booster dose. On the assumption that children who received SA14-14-2 vaccine and subsequently get one booster dose of JE-CV at 12-24 months later will have GMT of at least 1040, with 80% power and alpha 0.05, data at least 43 children need to be collected. When accounted for 15% of children who might loss to follow-up or cannot get adequate blood sample, 50 children should be enrolled.
The per-protocol population will be used for the main immunogenicity analyses. For the main parameters, 95% confidence intervals (CIs) of point estimates will be calculated using the normal approximation for quantitative data and the exact binomial distribution for proportions. The point estimates and their 95% CI of the following will be presented for each group of the Geometric Mean (GM) of neutralizing antibody on D0 and D28 and the percentage of subjects with neutralizing antibody >=10 at D0 and D28
Study design
- Primary purpose
- Prevention
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| a live attenuated chimeric JE vaccine | Experimental | Biological: a live attenuated chimeric JE vaccineChildren were received JE-CV as a booster dose after vaccinated with SA14-14-2 vaccine as a first dose regimen 12-24 months before. |
Who may qualify
- Ages
- 1 year to 5 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child
Key inclusion criteria (4 listed)
- 1 Children aged 1 to <5 years on the day of inclusion
- 2. History of received 1 dose of SA14-14-2 vaccine 12-24 months prior to enrollment
- 3. In good general health at the time of inclusion
- 4. Provision of informed consent by the parent(s) or legal guardian(s)
Key exclusion criteria (2 listed)
- Receipt of blood or blood products in the past 3 months.
- Acute febrile illness on the day of vaccination.( BT > 38 C)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| a live attenuated chimeric JE vaccineAlso: Japanese Encephalitis Chimeric Virus vaccineThe study included 2 visits (D0 and D28). At the first visit (D0), children were enrolled, collected the blood sample for evaluate the baseline immune status and given a JE-CV as a booster dose. After vaccination, children were observed for 30 minutes to monitor any immediate adverse events. Parents were given a digital thermometer for axillary temperature measurement, a ruler for measuring injection site reactions and a diary card for recording a solicited injection site and systemic reactions. At the second visit (D28), blood samples were collected for evaluate the immunogenicity. | Biological | a live attenuated chimeric JE vaccine |
Primary outcome
Changing in geometric mean titer of JE neutralizing antibody at day 0 pre-vaccination and day 28 post vaccination.
Time frame: day 0 pre-vaccination and day 28 post vaccination
1 secondary outcome
Proportion of children who had seroprotection at day 0 pre-vaccination and day 28 post vaccination
Time frame: day 0 pre-vaccination and day 28 post vaccination
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 20 Jan 2016.
- Background: PubMed 22777096Feroldi E, Pancharoen C, Kosalaraksa P, Watanaveeradej V, Phirangkul K, Capeding MR, Boaz M, Gailhardou S, Bouckenooghe A. Single-dose, live-attenuated Japanese encephalitis vaccine in children aged 12-18 months: randomized, controlled phase 3 immunogenicity and safety trial. Hum Vaccin Immunother. 2012 Jul;8(7):929-37. doi: 10.4161/hv.20071. Epub 2012 Jul 1.
- Background: PubMed 23442823Feroldi E, Capeding MR, Boaz M, Gailhardou S, Meric C, Bouckenooghe A. Memory immune response and safety of a booster dose of Japanese encephalitis chimeric virus vaccine (JE-CV) in JE-CV-primed children. Hum Vaccin Immunother. 2013 Apr;9(4):889-97. doi: 10.4161/hv.23087. Epub 2013 Feb 26.
- Background: PubMed 20856164Chokephaibulkit K, Sirivichayakul C, Thisyakorn U, Sabchareon A, Pancharoen C, Bouckenooghe A, Gailhardou S, Boaz M, Feroldi E. Safety and immunogenicity of a single administration of live-attenuated Japanese encephalitis vaccine in previously primed 2- to 5-year-olds and naive 12- to 24-month-olds: multicenter randomized controlled trial. Pediatr Infect Dis J. 2010 Dec;29(12):1111-7. doi: 10.1097/INF.0b013e3181f68e9c.
- Background: PubMed 21150279Nasveld PE, Ebringer A, Elmes N, Bennett S, Yoksan S, Aaskov J, McCarthy K, Kanesa-thasan N, Meric C, Reid M. Long term immunity to live attenuated Japanese encephalitis chimeric virus vaccine: randomized, double-blind, 5-year phase II study in healthy adults. Hum Vaccin. 2010 Dec;6(12):1038-46. doi: 10.4161/hv.6.12.13057. Epub 2010 Dec 1.
- Background: PubMed 22043776Chotpitayasunondh T, Sohn YM, Yoksan S, Min J, Ohrr H. Immunizing children aged 9 to 15 months with live attenuated SA14-14-2 Japanese encephalitis vaccine in Thailand. J Med Assoc Thai. 2011 Aug;94 Suppl 3:S195-203.
- Background: PubMed 22084515Campbell GL, Hills SL, Fischer M, Jacobson JA, Hoke CH, Hombach JM, Marfin AA, Solomon T, Tsai TF, Tsu VD, Ginsburg AS. Estimated global incidence of Japanese encephalitis: a systematic review. Bull World Health Organ. 2011 Oct 1;89(10):766-74, 774A-774E. doi: 10.2471/BLT.10.085233. Epub 2011 Aug 3.
- Background: PubMed 23965828Centers for Disease Control and Prevention (CDC). Japanese encephalitis surveillance and immunization--Asia and the Western Pacific, 2012. MMWR Morb Mortal Wkly Rep. 2013 Aug 23;62(33):658-62.
- Derived from this study: PubMed 27628323Janewongwirot P, Puthanakit T, Anugulruengkitt S, Jantarabenjakul W, Phasomsap C, Chumket S, Yoksan S, Pancharoen C. Immunogenicity of a Japanese encephalitis chimeric virus vaccine as a booster dose after primary vaccination with SA14-14-2 vaccine in Thai children. Vaccine. 2016 Oct 17;34(44):5279-5283. doi: 10.1016/j.vaccine.2016.09.005. Epub 2016 Sep 12.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Pakpoom Janewongwirot, md principal investigator
Chulalongkorn University
Questions about this trial
What is this clinical trial studying?
A study testing a live attenuated chimeric JE vaccine in people with Japanese Encephalitis, run by Chulalongkorn University.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 20 Jan 2016. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Changing in geometric mean titer of JE neutralizing antibody at day 0 pre-vaccination and day 28 post vaccination. (time frame: day 0 pre-vaccination and day 28 post vaccination). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT02602652, which also lists 8 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Jan 2016.