Preliminary Evaluation of [68Ga]CBP8 in Healthy Individuals, Lung Cancer, and Idiopathic Pulmonary Fibrosis Patients


The goal of this study is to investigate the safety of [68Ga]CBP8 and its efficacy to detect collagen deposition in pulmonary fibrosis.

Full Title of Study: “Preliminary Evaluation of [68Ga]CBP8 in Healthy Individuals, Lung Cancer Patients Undergoing Radiation Therapy Prior to the Resection of Locally Advanced Tumors, and Idiopathic Pulmonary Fibrosis Patients”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Non-Randomized
    • Intervention Model: Sequential Assignment
    • Primary Purpose: Diagnostic
    • Masking: None (Open Label)
  • Study Primary Completion Date: March 31, 2022

Detailed Description

The investigators have developed [68Ga]CBP8, a gallium-68 labeled collagen binding PET imaging probe, which selectively binds collagen type I. Collagen deposition is a pivotal event in several human conditions including pulmonary fibrosis. The investigator's studies in mice showed that [68Ga]CBP8 binds collagen with high affinity and has excellent pharmacological and pharmacokinetic profiles with high target uptake and low retention in background tissues and organs. [68Ga]CBP8 was shown in a mouse model to be effective for detecting lung fibrosis. [68Ga]CBP8 showed high specificity for pulmonary fibrosis and high target:background ratios in diseased animals. In addition, [68Ga]CBP8 could be used to monitor response to treatment. Ex vivo analysis of lung tissue from patients with IPF supported the animal findings. The investigators thus aim to perform the first in human studies of [68Ga]CBP8: 1. To evaluate the safety of [68Ga]CBP8 and its whole body distribution, metabolism, pharmacokinetics, and radiation burden in healthy volunteers. 2. To establish the accuracy of [68Ga]CBP8-PET to detect radiation-induced fibrosis in lung cancer patients and correlate collagen-targeted [68Ga]CBP8-PET imaging with HRCT and histology in lung cancer patients. 3. To determine whether collagen deposition as assessed by [68Ga]CBP8-PET molecular imaging can predict disease progression in IPF patients and patients with other types of ILD with a fibrotic component.


  • Drug: [68Ga]CBP8
    • Up to 15 mCi of [68Ga]CBP8 will be administered to each subject.
  • Diagnostic Test: PET Imaging
    • All subjects will undergo PET imaging after administration of [68Ga]CBP8.

Arms, Groups and Cohorts

  • Experimental: Healthy Individuals
    • Healthy volunteers will receive [68Ga]CBP8 and undergo PET imaging.
  • Experimental: Lung Cancer Subjects
    • Lung cancer patients will receive [68Ga]CBP8 and undergo PET imaging.
  • Experimental: Pulmonary Fibrosis Subjects
    • Idiopathic pulmonary fibrosis patients or patients with other types of interstitial lung disease with a fibrotic component will receive [68Ga]CBP8 and undergo PET imaging.

Clinical Trial Outcome Measures

Primary Measures

  • Ability to detect increased collagen deposition in pulmonary fibrosis.
    • Time Frame: Two hours
    • Probe lung uptake will be measured in pulmonary fibrosis subjects and compared to lung uptake in healthy volunteers. We expect greater uptake in the lungs of IPF patients and patients with other types of ILD with a fibrotic component.

Secondary Measures

  • Ability of the degree of collagen deposition to predict disease progression.
    • Time Frame: Up to 36 months
    • Probe lung uptake in pulmonary fibrosis patients will be correlated with change in forced vital capacity over the prior 12 months and prospectively over the following 12-36 months.

Participating in This Clinical Trial

Inclusion Criteria

Total enrollment for all groups (1, 2, and 3) will not exceed 25 subjects.

  • Group 1: Healthy subjects – Age greater than 18 years – Be deemed healthy at screening visit as determined by the physician investigator or nurse practitioner, based on the following assessments at Screening: physical examination, medical history, and vital signs – Have the ability to give written informed consent; – No known history of pulmonary disease (excluding pulmonary nodules); – No prior history of tobacco use. Group 2: Lung cancer patient subjects – Eligible patients will be those harboring locally advanced clinical stage IIIA NSCLC who are deemed candidates for multi-modality therapy, i.e. concurrent chemotherapy and radiation followed by pulmonary resection. – Age greater than 18 years – Have the ability to give written informed consent. – No tobacco use within the prior 6 months. Group 3: Subjects with pulmonary fibrosis – IPF (with a UIP or probable UIP pattern); or other forms of interstitial lung disease (ILD), including CTD-ILD, with a fibrotic component as noted by the presence of reticular markings and / or traction bronchiectasis and / or honeycombing on CT; – Age: 40-80 years old; – Have the ability to give written informed consent; – No tobacco use within the prior 6 months Exclusion Criteria:

  • Electrical implants such as cardiac pacemaker or perfusion pump; – Ferromagnetic implants such as aneurysm clips, surgical clips, prostheses, artificial hearts, valves with steel parts, metal fragments, shrapnel, metallic tattoos anywhere on the body, tattoos near the eye, or steel implants ferromagnetic objects such as jewelry or metal clips in clothing; – Pregnant or breastfeeding (a negative quantitative serum hCG pregnancy test is required for females having child-bearing potential before the subject can participate); – Claustrophobic reactions; – Research-related radiation exposure exceeds current Radiology Department guidelines (i.e. 50 mSv in the prior 12 months); – Unable to lie comfortably on a bed inside the MR-PET; – Body weight of > 300 lbs (weight limit of the MRI table); – Determined by the investigator(s) to be clinically unsuitable for the study (e.g. based on screening visit and/or during study procedures); – Known history of pulmonary disease (except for pulmonary fibrosis in the study group), recent pneumonia or respiratory tract infections within 6 weeks of enrollment, prior radiation therapy to the thorax (except for the lung cancer patients in aim 2); – Pneumonia or other acute respiratory illness within 6 weeks of study entry (except for pulmonary fibrosis), pneumonia defined with elevated WBC, fever, infiltrate on CXR and need for antibiotics Exclusion criteria specific to Group 2: – Stage IIIA NSCLC patients who undergo definitive bimodality therapy, i.e. chemotherapy and radiation without resection will be excluded.

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: 80 Years

Are Healthy Volunteers Accepted: Accepts Healthy Volunteers

Investigator Details

  • Lead Sponsor
    • Massachusetts General Hospital
  • Collaborator
    • National Heart, Lung, and Blood Institute (NHLBI)
  • Provider of Information About this Clinical Study
    • Principal Investigator: Peter Caravan, Professor of Radiology – Massachusetts General Hospital
  • Overall Official(s)
    • Sydney B Montesi, MD, Principal Investigator, Massachusetts General Hospital
  • Overall Contact(s)
    • Sydney B Montesi, MD, 617 724 4030,


Désogère P, Tapias LF, Hariri LP, Rotile NJ, Rietz TA, Probst CK, Blasi F, Day H, Mino-Kenudson M, Weinreb P, Violette SM, Fuchs BC, Tager AM, Lanuti M, Caravan P. Type I collagen-targeted PET probe for pulmonary fibrosis detection and staging in preclinical models. Sci Transl Med. 2017 Apr 5;9(384). pii: eaaf4696. doi: 10.1126/scitranslmed.aaf4696.

Désogère P, Tapias LF, Rietz TA, Rotile N, Blasi F, Day H, Elliott J, Fuchs BC, Lanuti M, Caravan P. Optimization of a Collagen-Targeted PET Probe for Molecular Imaging of Pulmonary Fibrosis. J Nucl Med. 2017 Dec;58(12):1991-1996. doi: 10.2967/jnumed.117.193532. Epub 2017 Jun 13.

Citations Reporting on Results

Montesi SB, Izquierdo-Garcia D, Désogère P, Abston E, Liang LL, Digumarthy S, Seethamraju R, Lanuti M, Caravan P, Catana C. Type I Collagen-targeted Positron Emission Tomography Imaging in Idiopathic Pulmonary Fibrosis: First-in-Human Studies. Am J Respir Crit Care Med. 2019 Jul 15;200(2):258-261. doi: 10.1164/rccm.201903-0503LE.

Clinical trials entries are delivered from the US National Institutes of Health and are not reviewed separately by this site. Please see the identifier information above for retrieving further details from the government database.

At, we keep tabs on over 200,000 clinical trials in the US and abroad, using medical data supplied directly by the US National Institutes of Health. Please see the About and Contact page for details.