Inositol to Reduce Retinopathy of Prematurity (INS-3)

INS-3: A Phase 3, Randomized, Double-Masked, Placebo-Controlled Study of the Efficacy and Safety of Myo-Inositol 5% Injection to Increase Survival Without Severe Retinopathy of Prematurity (Reduce-ROP) in Extremely Premature Infants

National Eye Institute (NEI), Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

This is a Phase 3, randomized, double-masked, placebo-controlled study designed to determine the effectiveness of myo-Inositol 5% Injection to increase the incidence of survival without severe Retinopathy of Prematurity (ROP) through acute/final ROP determination up to 55 weeks postmenstrual age (PMA) in premature infants <28 0/7 weeks' gestation.

Approximately 1760 infants are to be enrolled at approximately 18 Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) Neonatal Research Network (NRN) Centers (approximately 44 sites) in the United States. Infants meeting the study selection criteria and for whom informed consent is obtained will be randomized to receive either 80 mg inositol/kg/day or placebo, administered in divided doses every 12 hours (40 mg/kg/dose). Study drug will be administered daily, starting within 12 to 72 hours of birth and continued until the earliest of 34 weeks PMA, 10 weeks chronologic age, or the time of hospital discharge or transfer. Inositol or placebo will be administered IV until enteral feedings reach 120ml/kg/day (or sooner if the infant is no longer receiving IV fluids), at which time the same dose and formulation will be administered enterally every 12 hours. For publication purposes, the analysis of the primary efficacy outcome will consider the entire study population. In support of a new drug application (NDA) for use of myo-Inositol 5% Injection to increase survival without severe ROP through the determination of acute/final ROP status, the analysis of the primary efficacy outcome will be conducted for the entire study population and separately within pre-specified regulatory sub-studies created by administratively splitting infants enrolled at each study center into two sub-studies. Assessments performed during the study include customary newborn intensive care procedures including repeat eye examinations until ROP status is final (which often extends after discharge), measurements of growth, cranial ultrasounds or other imaging per usual practice, and the collection of clinical diagnoses throughout hospitalization to evaluate other common morbidities of extreme preterm birth. Adverse events will be recorded from time of treatment initiation until 7 days after the last dose of study drug, and concurrent medications will be recorded from 24 hours prior to randomization until 7 days after the last dose of study drug or until discharge or transfer if sooner. Using the separate NICHD Follow-up protocol, longer term data will be collected at 22-26 months corrected age, including growth, neurodevelopmental testing, overall health status, rehospitalizations, surgeries and diagnoses, including ophthalmic diagnoses and treatments since discharge.

Within 12-72 hours of birth, infants will receive 80 mg myo-inositol 5% Injection per kilogram per day, administered in divided doses every 12 hours (40 mg/kg/dose). Study drug will be administered daily and continued until the earliest of 34 completed weeks PMA, 10 weeks (70 days) chronologic age, or the time of discharge. myo-Inositol 5% Injection will be administered IV until enteral feedings are established, at which time the same dose and formulation will be administered enterally every 12 hours.

Within 12-72 hours of birth, infants will receive 80 mg 5% glucose(dextrose) USP for intravenous infusion per kilogram per day, administered in divided doses every 12 hours (40 mg/kg/dose). Study drug will be administered daily and continued until the earliest of 34 completed weeks PMA, 10 weeks (70 days) chronologic age, or the time of discharge. myo-Inositol 5% Injection will be administered IV until enteral feedings are established, at which time the same dose and formulation will be administered enterally every 12 hours.

Abbott Nutrition Division, Abbott Laboratories is supplying myo-Inositol 5% Injection to the clinical centers for the duration of the trial. Inositol: myo-Inositol 5% Injection is an isotonic, preservative-free, sterile 5% solution of myo-inositol in water containing 0.5 gm sodium chloride per liter (8.55mM), pH 6.5-7.5. It is administered via IV infusion using syringe pump over 15-30 minutes twice per day at 12-hour intervals at a dose of 80 mg inositol/kg/day (40 mg inositol/kg/dose), which is equivalent to 1.6 mL/kg/day (0.80 mL/kg/dose).

Number of Participants With Unfavorable Outcome, Defined as Severe Retinopathy of Prematurity (ROP) or Death Prior to Reaching Acute/Final ROP Status

Death is defined as from any cause before Acute/Final ROP status is determined. ROP was identified by routine ophthalmologic examinations beginning at the latter of 31 weeks PMA or 4-6 weeks chronologic age. The favorable ROP endpoint requires that no ROP, or only mild ROP has occurred in both eyes and the eyes have matured beyond the risk of developing Type 1 ROP (severity meeting criteria for surgical intervention). The unfavorable ROP endpoint requires that one or both eyes reach Type 1 ROP. When ROP did not resolve by the time of discharge, participants were followed as outpatients until reaching an ROP endpoint, up to 55 weeks PMA. Since incomplete follow up is more likely among participants with mild or no ROP than for those with aggressive ROP, an independent adjudication process assigned an ROP endpoint of 'most likely never had Type 1 ROP', or 'most likely developed Type 1 ROP' based on clinical and ROP data review to reduce possible missing data bias.

BPD is defined as supplemental oxygen required to maintain an oxygenation saturation of >90% at 36 weeks postmenstrual age (PMA) (NICHD physiologic definition).

BPD is defined as supplemental oxygen required to maintain an oxygenation saturation of >90% at 36 weeks PMA (NICHD physiologic definition). Death from BPD prior to 37 weeks postmenstrual age (PMA) is defined when the cause of death is certified by the Center PI as BPD being the primary cause, or a significant co-contributing cause of death.

Defined as death from any cause following randomization through primary study follow-up (up to 55 weeks postmenstrual age (PMA))

ROP was identified by routine ophthalmologic examinations beginning at the latter of 31 weeks PMA or 4-6 weeks chronologic age. Any ROP is defined as ROP of any severity that is observed on at least 2 independent examinations in either eye through the time that Acute/Final ROP status is reached (up to 55 weeks postmenstrual age (PMA)).

Defined as one or both eyes reaching Type 2 ROP (ETROP 2003) or the more severe Type 1 ROP (as defined previously) through the time that Acute/Final ROP status is reached (up to 55 weeks postmenstrual age (PMA)). Type 2 ROP is defined as (ETROP 2003): Stage 3 ROP without Plus Disease (i.e. Zone II) or Stage 1 or 2 ROP without Plus Disease (i.e. Zone I).

Severe IVH is defined as IVH Grades 3 or 4 on either side of the brain. The evaluation for IVH occurs early (within 28 days from birth) via a cranial sonogram and is classified as described by Papile.

Stage II or worse, whether treated (medically or surgically) and if the infant survived (modified Bell's classification [Walsh 1986]).

NRN infant status, i.e., the first occurring of: discharge home, death, transfer, or 120 days following birth

NRN infant status, i.e., the first occurring of: discharge home, death, transfer, or 120 days following birth

culture positive septicemia/bacteremia (≥72 hours of age) treated with antibiotics for ≥ 5 days or died before treatment was completed.

NRN infant status, i.e., the first occurring of: discharge home, death, transfer, or 120 days following birth

Occurrence of clinically significant patent ductus arteriosus (PDA), and if received intervention with prostaglandin inhibitors, and/or surgery.

NRN infant status, i.e., the first occurring of: discharge home, death, transfer, or 120 days following birth

NRN infant status, i.e., the first occurring of: discharge home, death, transfer, or 120 days following birth

NRN infant status i.e., the first occurring of: discharge home, death, transfer, or 120 days following birth

NRN infant status i.e., the first occurring of: discharge home, death, transfer, or 120 days following birth

NRN infant status i.e., the first occurring of: discharge home, death, transfer, or 120 days following birth

Neurodevelopment at 22-26 months corrected age (i.e., 22-26 months past due date) using the Bayley Scales of Infant Development III.

Vision loss as diagnosed by an ophthalmologist as legally blind, and subdivided into "ophthalmic origin", or "not ophthalmic origin" (i.e., cortical blindness is non-ophthalmic in origin and indicates that there is no retinal detachment or other abnormal fundus or ocular finding, except optic atrophy. Such cases will be considered central [neurologic] in origin.)

Overall health status per recall from the parent/guardian (including survival, re-hospitalizations, surgeries, ongoing medications, and chronic illnesses).

Inclusion Criteria: Inborn or out born infants of either gender or any race with best obstetrical estimate of gestation <28 weeks (27 6/7 weeks and younger). Gestational age will be determined by best obstetrical estimate using the hierarchy of best obstetrical estimate using early ultrasound dating, maternal menstrual dating confirmed by examination, or neonatal gestational age assessment by physical examination. Alive at 12 hours. Age in hours up to 72 hours, although we will seek enrollment as early as feasible after consent and 12 hours. Informed consent signed and dated by parent and/or guardian, which includes likelihood of completing follow-up ophthalmic examinations as an outpatient, and long-term follow-up. Exclusion Criteria Major congenital malformations Congenital malformations of the eye identified prior to randomization. Overt evidence of intrauterine congenital infections ("TORCH") or life threatening impairment of renal, hepatic, or cardiac function (considered moribund).

NIH has had a long-standing policy to share and make available to the public the results and accomplishments of the activities that it funds. The NRN plans to share de-identified data after final publication in an NIH supported data repository such as the NICHD Data and Specimen Hub (https://dash.nichd.nih.gov).

Brumbaugh JE, Bell EF, Hirsch SC, Crenshaw EG, DeMauro SB, Adams-Chapman IS, Lowe JR, Natarajan G, Wyckoff MH, Vohr BR, Colaizy TT, Harmon HM, Watterberg KL, Hintz SR; Eunice Kennedy Shriver National Institute of Child Health and Human Development Neonatal Research Network. Relationships between retinopathy of prematurity without ophthalmologic intervention and neurodevelopment and vision at 2 years. Pediatr Res. 2021 Oct 22:10.1038/s41390-021-01778-y. doi: 10.1038/s41390-021-01778-y. Online ahead of print.