Study to Evaluate the Efficacy and Safety of Suptavumab (REGN2222) for the Prevention of Medically Attended RSV (Respiratory Syncytial Virus) Infection in Preterm Infants
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|ClinicalTrials.gov Identifier: NCT02325791|
Recruitment Status : Completed
First Posted : December 25, 2014
Results First Posted : November 6, 2018
Last Update Posted : November 6, 2018
|Condition or disease||Intervention/treatment||Phase|
|Respiratory Syncytial Virus Infections||Drug: Suptavumab 30 mg/kg Drug: Placebo Matched to Suptavumab Drug: Suptavumab 30 mg/kg- 1 Dose Drug: Suptavumab 30 mg/kg - 2 Doses||Phase 3|
This study occurred in two parts: Part A and Part B.
Part A of the study was an open-label, PK evaluation of intramuscular (IM) administered suptavumab in preterm infants for whom palivizumab was not recommended to enable the selection of dosing regimens for Part B.
Part B of the study was randomized, double-blind, and placebo-controlled, designed to evaluate efficacy, safety, serum concentration and immunogenicity of IM administration of suptavumab in preterm infants for whom palivizumab was not recommended. The total duration of Part B was up to 265 days (includes a 28-day screening period, 57-day treatment period and 180-day follow-up period).
Up to 1515 subjects were planned to be included in Part B of the study. Participants were randomly assigned to 1 of 3 different groups, each with 505 infants; one group received one dose of suptavumab and one dose of placebo, the second group received two doses of suptavumab, and the third group received two doses of placebo.
There was a separate genetic testing sub study.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||1177 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)|
|Official Title:||A Phase 3, Randomized, Double-Blind, Placebo-Controlled Study Evaluating the Efficacy and Safety of a Human Monoclonal Antibody, REGN2222, for the Prevention of Medically Attended RSV Infection in Preterm Infants|
|Study Start Date :||July 21, 2015|
|Actual Primary Completion Date :||July 5, 2017|
|Actual Study Completion Date :||September 26, 2017|
|Experimental: Part A: Suptavumab 30 mg/kg||
Drug: Suptavumab 30 mg/kg
Participants received single dose of suptavumab 30 milligram per kilogram (mg/kg) intramuscularly (IM) on Day 1.
Other Name: REGN2222
|Experimental: Part B: Placebo Matched to Suptavumab||
Drug: Placebo Matched to Suptavumab
Participants received 2 IM doses of placebo matched to suptavumab: the first dose on Day 1 and the second dose on Day 57.
|Experimental: Part B: Suptavumab 30 mg/kg- 1 Dose||
Drug: Suptavumab 30 mg/kg- 1 Dose
Participants received single dose of suptavumab 30 mg/kg IM on Day 1 and single dose of placebo matched to suptavumab on Day 57.
|Experimental: Part B: Suptavumab 30 mg/kg - 2 Doses||
Drug: Suptavumab 30 mg/kg - 2 Doses
Participants received 2 doses of suptavumab 30 mg/kg IM: the first dose on Day 1 and the second dose on Day 57.
- Part A: Serum Concentration of Suptavumab Over Time [ Time Frame: Day 1 through Day 150 ]Part A was primarily designed to determine the pharmacokinetics (PK) of suptavumab in infants to inform the dose regimen used in Part B of the study. The study protocol specified the process and criteria for assessment of the dose. The dose used in Part B was to remain the same as Part A if the PK data up to Day 57 demonstrated that the individual PK observations were consistent with model-predicted concentrations, following age and body weight corrections.
- Part B: Percentage of Participants With Medically Attended Respiratory Syncytial Virus (RSV) Infection (Hospitalization or Outpatient Visit With Lower Respiratory Tract Infection [LRTI]) Up to Day 150 [ Time Frame: From first study drug administration up to Day 150 ]A medically attended RSV infection defined as an infant with positive RSV test by Reverse-transcriptase polymerase chain reaction (RT-PCR) with any of following events: Hospitalized (on basis of assessment of admitting physician) for RSV infection or outpatient visit (emergency room [ER], urgent care [UC], or pediatric clinic visits [for either a sick or well visit]) with RSV lower respiratory tract infection (LRTI). An RSV LRTI in an infant: RSV proven respiratory infection (i.e positive RSV RT-PCR test) with parent(s)/guardian(s) report of cough/difficulty breathing, & with 1 of following signs of LRTI, as assessed by healthcare provider: - lower chest wall in drawing -hypoxemia (peripheral capillary oxygen saturation <95% breathing room air) - Wheezing/crackles. The 150-day efficacy assessment period: first study drug intake through the Day 150 visit.
- Part A: Percentage of Participants With Treatment-Emergent Adverse Events (TEAEs) [ Time Frame: Baseline through Day 150 ]Any untoward medical occurrence in participants, who received investigational medicinal product (IMP) was considered an adverse event (AE) without regard to possibility of causal relationship with this treatment. TEAEs: AEs that developed/worsened/became serious during on-treatment period (defined as time between the date of first study drug administration & date of end of study/last visit).Serious AE: Any untoward medical occurrence that resulted in any of following outcomes: death, life-threatening, required initial or prolonged in-patient hospitalization, persistent/significant disability/incapacity, congenital anomaly/birth defect, or considered as medically important event. Any TEAE included participants with both serious & non-serious AEs. National Cancer Institute Common Terminology Criteria (NCI-CTCAE) version 4.03(Grade 3 [severe] & Grade 4[life-threatening]) was used in this study to grade clinical AEs.
- Part B: Serum Concentration of Suptavumab [ Time Frame: Day 29, 57, 85, 113 and Day 150 Post-dose ]Serum samples for drug concentration will be collected at pre-specified time points
- Part B: Number of Participants With At Least One Positive Anti-Drug Antibody (ADA) Assay [ Time Frame: Day 1 through Day 150 ]ADA category of each participant was classified as pre-existing immunoreactivity (a positive ADA response at baseline with a <4-fold increase in titer for all post baseline samples), treatment-boosted (a positive response at baseline with at least one post baseline titer at >=4-fold the baseline titer), or treatment-emergent (TE [any positive post baseline assay response when baseline results were negative or missing]). TE ADA responses were further classified as persistent (treatment-emergent positive ADA response detected in at least 2 consecutive post baseline samples separated by at least a 12-week post baseline period [based on nominal sampling time], with no ADA-negative samples in-between, regardless of any missing samples or a positive response at the last ADA sampling time point), indeterminate (a positive assay response at the last collection time point only, regardless of any missing samples), or transient (not persistent/indeterminate, regardless of any missing samples).
- Part B: Percentage of Participants Hospitalized With Medically Attended RSV Infection or Outpatient Visit Lower Respiratory Tract Infection (LRTI) or Upper Respiratory Tract Infection (URTI) Up to Day 150 [ Time Frame: From the first study drug administration up to Day 150 ]A medically attended RSV infection was defined as an infant with a positive RSV test by RT-PCR with any of the following events: -Hospitalized (on the basis of the assessment of the admitting physician) for RSV infection - or Outpatient visit (ER, UC), or pediatric clinic visits [for either a sick or well visit]) with RSV LRTI. An RSV LRTI in an infant: RSV-proven respiratory infection (i.e, positive RSV RT-PCR test) with parent(s)/guardian(s) report of cough or difficulty breathing, and with 1 of the following signs of LRTI, as assessed by a healthcare provider: -Lower chest wall indrawing -Hypoxemia (peripheral capillary oxygen saturation <95% breathing room air) -Wheezing or crackles. The 150-day efficacy assessment period:first study drug intake through the Day 150 visit.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02325791
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|Study Director:||Clinical Trial Management||Regeneron Pharmaceuticals|