Oral Antibiotic Pharmacokinetics in Young Infants
8. september 2026 oppdatert av: University of Colorado, Denver
Characterizing Absorption Kinetics of Oral Antibiotics in Young Infants to Enhance Precision Dosing
This observational study will characterize the pharmacokinetics of linezolid in young infants.
Participants will receive linezolid either as part of routine clinical care or as a single, one-time study dose.
Blood samples collected following linezolid administration will be used to measure drug concentrations and describe how linezolid is absorbed, distributed, metabolized, and eliminated in this population.
Clinical information, including demographic characteristics, laboratory values, and treatment details, will also be collected.
The results will be used to develop pharmacokinetic models to improve linezolid dosing recommendations and support precision dosing in young infants.
Studieoversikt
Status
Har ikke rekruttert ennå
Forhold
Intervensjon / Behandling
Detaljert beskrivelse
Young infants are at increased risk for serious bacterial infections, yet limited pharmacokinetic data are available to guide evidence-based dosing of oral linezolid in this population. Developmental changes in drug absorption, distribution, metabolism, and elimination during early infancy contribute to variability in drug exposure, making it difficult to optimize dosing using existing recommendations.
This prospective pharmacokinetic study will enroll young infants who receive linezolid either as part of routine clinical care or as a single, one-time study dose. Blood samples will be collected to measure plasma linezolid concentrations, and demographic, clinical, laboratory, and medication data will be collected from the medical record. These data will be used to develop pharmacokinetic models and evaluate sources of variability in linezolid exposure, including developmental and clinical factors.
The results of this study are expected to improve the understanding of oral linezolid pharmacokinetics in young infants and support the development of model-informed dosing strategies to optimize antibiotic exposure, maximize treatment effectiveness, and minimize toxicity in this vulnerable population.
Studietype
Intervensjonell
Registrering (Antatt)
40
Fase
- Fase 4
Kontakter og plasseringer
Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.
Studiesteder
-
-
Colorado
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Aurora, Colorado, Forente stater, 80045
- University of Colorado, Denver
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Ta kontakt med:
- Andrew S Haynes, MD
- Telefonnummer: 720-777-6783
- E-post: andrew.haynes@childrenscolorado.org
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Hovedetterforsker:
- Andrew S Haynes, MD
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-
Deltakelseskriterier
Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
- Barn
Tar imot friske frivillige
Nei
Beskrivelse
Inclusion Criteria:
- Hospitalized neonate or young infant ≤90 days postnatal age at screening
- Weight ≥2 kg
- Receiving systemic antibiotic therapy
- Tolerating enteral medication(s) and/or enteral feeds
- Group 1: Receiving oral linezolid as part of routine clinical care.
- Group 2: Receiving systemic antibiotic therapy but not prescribed linezolid clinically and eligible to receive a single oral study dose.
Exclusion Criteria:
- Known hypersensitivity or allergy to linezolid
- Renal dysfunction (defined by age-appropriate serum creatinine and/or urine output)
- Hepatic dysfunction (AST or ALT ≥3x age-specific upper limit of normal or clinically significant hepatic failure)
- Gastrointestinal disorders expected to significantly impair drug absorption (e.g., short bowel syndrome, severe malabsorption)
- Severe anemia or other condition that precludes study-required blood sampling
- Extracorporeal support or other devices expected to substantially alter drug pharmacokinetics (e.g., extracorporeal membrane oxygenation [ECMO]).
- Therapeutic hypothermia
- Ongoing clinical instability that, in the opinion of the treating team or principal investigator (PI), would make study participation unsafe (e.g., escalating vasoactive support or rapidly worsening organ dysfunction).
Studieplan
Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.
Hvordan er studiet utformet?
Designdetaljer
- Primært formål: Annen
- Tildeling: Ikke-randomisert
- Intervensjonsmodell: Parallell tildeling
- Masking: Ingen (Open Label)
Våpen og intervensjoner
Deltakergruppe / Arm |
Intervensjon / Behandling |
|---|---|
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Ingen inngripen: Group 1: Routine Clinical Linezolid
Participants receiving linezolid as part of routine clinical care will undergo pharmacokinetic blood sampling and clinical data collection.
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|
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Eksperimentell: Group 2: Single Study Dose of Linezolid
Participants will receive a single study-administered dose of linezolid (10 mg/kg/dose enterally) followed by pharmacokinetic blood sampling and clinical data collection.
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Linezolid is administered either as part of routine clinical care or as a single, one-time study dose (10 mg/kg/dose enterally), depending on study arm.
Participants undergo pharmacokinetic blood sampling after linezolid administration to characterize drug disposition in young infants.
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Hva måler studien?
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
Area under the plasma linezolid concentration versus time curve from 0 to 24 hours (AUC0-24)
Tidsramme: From 0 to 24 hours after administration of an enteral linezolid dose
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Area under the plasma linezolid concentration versus time curve from 0 to 24 hours (AUC0-24) will be estimated using plasma linezolid concentrations collected after enteral administration of linezolid (either routine clinical dosing or a single study dose) and pharmacokinetic modeling.
AUC0-24 will be reported in mcg hour per mL.
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From 0 to 24 hours after administration of an enteral linezolid dose
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Apparent clearance of linezolid (CL/F)
Tidsramme: From 0 to 12 hours after administration an enteral linezolid dose
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Apparent clearance of linezolid following enteral administration (either routine clinical dosing or a single study dose) will be estimated from plasma linezolid concentrations using population pharmacokinetic modeling.
Apparent clearance will be reported in L/hour.
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From 0 to 12 hours after administration an enteral linezolid dose
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Apparent volume of distribution of linezolid (V/F)
Tidsramme: From 0 to 12 hours after administration of an enteral linezolid dose
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Apparent volume of distribution of linezolid following enteral administration (either routine clinical dosing or a single study dose) will be estimated from plasma linezolid concentrations using population pharmacokinetic modeling.
Apparent volume of distribution will be reported in L per kilogram of body weight.
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From 0 to 12 hours after administration of an enteral linezolid dose
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Absorption rate constant of linezolid (Ka)
Tidsramme: From 0 to 12 hours after administration of an enteral linezolid dose
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The absorption rate constant of linezolid following enteral administration (either routine clinical dosing or a single study dose) will be estimated from plasma linezolid concentrations using population pharmacokinetic modeling.
The absorption rate constant will be reported in 1/hour.
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From 0 to 12 hours after administration of an enteral linezolid dose
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Sekundære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
Concentrations of Linezolid and Primary Metabolites in Plasma
Tidsramme: From 0 to 12 hours after administration of an enteral linezolid dose
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Measure plasma concentrations of linezolid and its primary metabolites at prespecified sampling time points following routine clinical dosing or a single study dose.
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From 0 to 12 hours after administration of an enteral linezolid dose
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Percentage of participants achieving the prespecified linezolid pharmacodynamic target
Tidsramme: From 0 to 12 hours after administration of an enteral linezolid dose
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Pharmacodynamic target attainment will be determined using model-estimated linezolid exposure and a prespecified pharmacodynamic target based on the AUC0-24/MIC ratio.
The specific target threshold will be defined in the study analysis plan based on available pharmacodynamic data.
The outcome will be reported as the percentage of participants achieving the prespecified target.
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From 0 to 12 hours after administration of an enteral linezolid dose
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Percentage of Participants Experiencing One or More Adverse Events or Serious Adverse Events
Tidsramme: From signing the informed consent form through study completion, up to 5 days
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Adverse events and serious adverse events will be assessed from signing the informed consent form through study completion, up to 5 days.
The incidence, severity, and type of adverse events and serious adverse events will be assessed.
The outcome will be reported as the percentage of participants experiencing one or more adverse events or serious adverse events.
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From signing the informed consent form through study completion, up to 5 days
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Andre resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
Difference between PBPK model predicted and observed linezolid plasma concentrations
Tidsramme: From 0 to 12 hours after administration of an enteral linezolid dose
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PBPK model predicted plasma linezolid concentrations will be compared with observed plasma linezolid concentrations collected at prespecified sampling time points.
Predictive performance will be summarized using the ratio of predicted to observed concentrations.
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From 0 to 12 hours after administration of an enteral linezolid dose
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Samarbeidspartnere og etterforskere
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Sponsor
Studierekorddatoer
Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.
Studer hoveddatoer
Studiestart (Antatt)
1. januar 2027
Primær fullføring (Antatt)
31. desember 2029
Studiet fullført (Antatt)
31. desember 2030
Datoer for studieregistrering
Først innsendt
6. august 2026
Først innsendt som oppfylte QC-kriteriene
8. september 2026
Først lagt ut (Faktiske)
11. september 2026
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
11. september 2026
Siste oppdatering sendt inn som oppfylte QC-kriteriene
8. september 2026
Sist bekreftet
1. september 2026
Mer informasjon
Begreper knyttet til denne studien
Nøkkelord
Ytterligere relevante MeSH-vilkår
Andre studie-ID-numre
- 26-1733
Plan for individuelle deltakerdata (IPD)
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Nei
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