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A Study to Assess Concentration of TREMFYA in Breast Milk of Lactating Women Who Are Receiving TREMFYA Therapeutically

CNTO1959ISD4001: A Phase 4, Open-Label, Milk-Only Lactation Study to Assess Concentration of TREMFYA in Breast Milk of Lactating Women Who Are Receiving TREMFYA Therapeutically

Status
Recruiting
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07654751
Enrollment
10
Registered
2026-06-17
Start date
2026-08-07
Completion date
2027-08-31
Last updated
2026-08-28

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Arthritis, Psoriatic, Colitis, Ulcerative, Crohn Disease, Psoriasis

Brief summary

The purpose of this post-marketing study is to assess the amount of guselkumab in breast milk of lactating women receiving guselkumab as part of their standard clinical care provided by their treating physician, for any of the approved indications.

Interventions

PROCEDUREBreast Milk Sample Collection

Breast milk samples will be collected as per the schedule specified in protocol.

DRUGGuselkumab

Guselkumab as prescribed by the participant's treating physician and obtained by the participant outside of the study per the treating physician's practice will be used.

Sponsors

Janssen Research & Development, LLC
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Has an active diagnosis of at least one approved indication for guselkumab (psoriasis, psoriatic arthritis \[PsA\], UC and CD) as confirmed by medical records * Be medically stable on the basis of medical history review performed at screening. Any abnormalities must be consistent with the underlying illness in the study population and this determination must be recorded in the participant's source documents and initialed by the investigator * Currently is on established guselkumab maintenance therapy, that is, has received at least 2 guselkumab subcutaneous (SC) maintenance doses before Day 1 * Has made the decision to be treated with guselkumab and to breastfeed independently prior to the participant consenting to participate in this study * Must be at least 5 weeks postpartum on Day 1 * Have well-established lactation; participant must be exclusively breastfeeding their infant(s) (or not providing more than 1 supplemental bottle of formula/day) when enrolled in the study * Must plan to continue breastfeeding throughout the duration of the study

Exclusion criteria

* Has any current or previous illness that, in the opinion of the investigator, might confound the results of the study or that could prevent, limit, or confound the protocol specified assessments * Has history of drug or alcohol abuse according to the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-V) criteria within 1 year before screening * Uses or has used an investigational drug (including investigational vaccines) or used an invasive investigational medical device within 1 month before enrolling in the study * Has received or plans to receive any live, attenuated vaccine within 12 weeks prior to administration of guselkumab. Non-live vaccines approved or authorized for emergency use (for example, Coronavirus disease-19 \[COVID-19\]) by local health authorities are allowed * Has a positive urine pregnancy test on Day 1

Design outcomes

Primary

MeasureTime frameDescription
Guselkumab Concentrations at Steady State in Breast Milk (Q4W Maintenance Regimen)Up to Day 29Guselkumab concentration at steady state in the breast milk of lactating participants receiving guselkumab Q4W maintenance regimen will be reported.
Guselkumab Concentrations at Steady State in Breast Milk (Q8W Maintenance Regimen)Up to Day 57Guselkumab concentration at steady state in the breast milk of lactating participants receiving guselkumab Q8W maintenance regimen will be reported.
Estimated Daily Infant Dosage of Guselkumab Q4W Maintenance RegimenUp to Day 29The estimated daily infant dosage of guselkumab Q4W maintenance regimen will be reported.
Estimated Daily Infant Dosage of Guselkumab Q8W Maintenance RegimenUp to Day 57The estimated daily infant dosage of guselkumab Q8W maintenance regimen will be reported.

Countries

United States

Contacts

CONTACTStudy Contact
Participate-In-This-Study1@its.jnj.com844-434-4210
STUDY_DIRECTORJanssen Research & Development, LLC Clinical Trial

Janssen Research & Development, LLC

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 29, 2026