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Investigator-Initiated Trials (IIT), also known as Investigator-Initiated Studies (IIS), are unsolicited research studies in which the investigator (usually an individual or institution, collaborative study groups) takes the lead in designing, planning, and conducting the study, as opposed to a pharmaceutical company or sponsor. These studies play a crucial role in advancing scientific knowledge regarding Celltrion products, exploring new uses for existing treatments, and addressing clinical questions to expand patient care.


The investigator assumes a central role and are primarily responsible for the design, execution, and oversight of the study. Their responsibilities encompass scientific,legal, regulatory and ethical aspects of the trial.


Investigators bear the legal and regulatory responsibilities of the trial sponsor for the conduct and management of the study, complying with applicable laws and regulations. Such obligations associated with the conduct of the study include, but are but not limited to, the following:


  • Study Design and Planning
  • Ethics and Approvals
  • Participant Recruitment and Consent
  • Data Collection and Monitoring
  • Safety Oversight
  • Data Management
  • Study Reports or Publications

Areas if Interest:


Celltrion US is currently accepting IIT proposals in the following areas of Interest


Areas of Interest
Drug: Zymfentra (Infliximab-dyyb) Subcutaneous (SC) Injection
Real World Studies (Prospective, Retrospective, Observational)
  • Patient Reported Outcomes
  • Intravenous (IV) vs. Subcutaneous SC Infliximab (IFX) dosing
  • Efficacy
  • Therapeutic Drug Monitoring
  • Switching patterns
  • Different SC IFX dosing regimens
IV Vs. SC IFX dosing
Attributes of ideal candidates for IFX SC Therapy
Therapeutic Drug Monitoring
Switching from IV to SC IFX
  • New start patients
  • Stable patients on IV IFX
  • Switching from optimized IV IFX dosing to SC IFX
Dose Escalation due to loss of response
SC IFX dosing in high (body mass index (BMI) Patients
SC IFX in Patients with Perianal Disease/Fistulizing Crohn’s Disease
Crohn’s Disease (CD) and Ulcerative Colitis (UC) disease modification
Cost Efficiency of SC IFX utilization
Optimal monitoring of disease, including non-invasive mucosal healing monitoring tools (e.g., ultrasound)
Assessment of biomarkers aimed at identifying various factors influencing response
Precision Therapy Strategy
Explore Dosing Strategies to enhance disease management
Treatment decisions in rural/underserved populations

Scope of Support


The IIT support provided by Celltrion USA is for US researchers only. Celltrion USA will provide support as either a research grant and/or supply of an investigational medicinal product (IMP) provided that align with the company-defined areas of strategic interest.


How to Apply


Celltrion USA accepts concept proposal submission and full studyproposalsubmissions for IITs. Investigators requesting IIT support should submit their initial concept proposalsubmission to grants_usa@celltrionhc.com


If you need assistance prior to submission and during the review process, please contact your Celltrion USA Field Based Medical Science Liaison for more information.If you do not know who your local Celltrion USA Medical representative is, pleasesend an email to medical_usa@celltrionhc.com and you will be connected with your Medical Science Liaison.


Concept Proposal Submission:


A brief concept proposal must provide sufficient information for Celltrion USA to evaluate its potential and decide whether to request full study proposal. When submitting a concept proposal please include the following (if applicable):


  • Principal Investigator contact information
  • Proposed (preliminary) Title of the research study
  • Brief background and rationale for the study
  • Primary study objectives/endpoints
  • Brief Study Synopsis
  • Study population including estimated number of subjects and preliminary justification
  • Research Setting: Single-site or Multi-site
  • Estimated total length of the study
  • Estimated study timelines
  • Estimated total study budget
  • Curriculum vitae from the principal investigator dated within the last calendar year

Full Study Proposal


Upon request, a full study proposal submission must contain enough detail about the research study to enable the Celltrion USA to make an evaluation on support. When submitting a full study proposal, the following information will be requested (if applicable):


  • Principal Investigator contact information
  • Title of the proposed research study
  • Study Type: non-clinical or clinical
  • Grant Funding: Funding, Drug, or Both
  • Study Rationale
  • Objectives: Primary and Secondary
  • Inclusion/Exclusion criteria
  • Study Design
  • Target Enrollment
  • Treatment Plan/Dosing Regimen (if applicable)
  • Study Duration
  • Target Start and End Dates
  • Efficacy Variables/measures
  • Safety variables/measures
  • Adverse event/Serious adverse event reporting
  • Decision points/statistical methods/interim analysis
  • Ethical rationale for the study
  • Study Deliverables
  • Applicable Scientific References
  • Publication Plan
  • Detailed budget

Please Note: For all research grant proposals that include monetary support the investigator should submit a completed copy of the payee IRS W-9 Form.


Review Process


The Celltrion USA IIT review process involves the following steps:


Step 1: Concept Proposal submission

  • Concept Proposal Submission: Investigators submit their research proposals using the template.
  • Acknowledgment: Receipt of the concept proposal is confirmed.


Step 2: Internal Review by CTUS of concept proposal.


Step 3: Full Proposal submission requestby HCP

Full Proposal Submission: If a concept proposal shows potential, a request for full study proposalsubmission will follow.


Step 4: Internal Committee review by Celltrion USA

  • Committee Review: A grant review committee evaluates the submission.
  • Scientific Assessment: The proposal is reviewed for medical and scientific merit.
  • Additional Considerations: Factors such as the investigator’s expertise, clinical trial experience, available resources, and alignment with Celltrion’ s research priorities are assessed.

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