Proteostasis Therapeutics to Initiate First Ever Personalized Medicine-Based Clinical Trial, CHOICES, in European CF Patients with Genotypes Ineligible for Approved CFTR Modulators
HIT-CF is sponsored by the European Commission Horizon 2020 program, in which CF-Europe, a patient organization representing more than 48,000 individuals with CF, collaborates and with the European Cystic Fibrosis Society Clinical Trial Network (ECFS-CTN), which is recruiting adult CF patients into the ex- vivo study through its 43 clinical trial centers. HIT-CF collects tissue samples from CF patients and develops organoids, or miniaturized organs, that are genetically identical to the patient donor, and share the same micro-anatomy as the organ from which they were derived.
As of today, rectal organoids from over 300 subjects have been collected for functional profiling and of those, 65 have been tested for response to PTI's investigational drugs. Early results support the initiation of enrollment of responding subjects into HIT-CF's clinical trial known as "CHOICES" (Crossover trial based on Human Organoid Individual response in CF - Efficacy Study), which is designed to evaluate the translation of organoid ex-vivo response to potential clinical benefit, such as changes in FEV1 and sweat chloride. CHOICES, which is expected to initiate in mid-2020, will be the first ever personalized medicine-based study in CF, with initial data expected by the end of 2020. Fully funded by the HIT-CF, this trial is a placebo controlled, double blind, crossover study with an 8-week treatment period and 6 months of uninterrupted dosing. The results may serve as the basis for a potential Marketing Authorization Application with the
Results from the HIT-CF project to date will be presented at the Keystone Symposia on Tissue Organoids titled "Tissue Organoids as Models of Host Physiology and Pathophysiology of Disease (J1)" taking place on
"Proteostasis is honored to have been invited to participate in the HIT-CF project and is the only company in the group with a combination of novel CFTR modulators being tested ex-vivo. We are very enthusiastic about the progress of the study," said
"The inequality in access to CFTR modulators is an acute problem across
Organoids are cell cultures that grow in a culture dish and look similar to the organ from which they are derived. Because organoids are made from stem cells, they contain the same mutations as the person from whom the biopsies are derived. Investigational drugs which target the basic defect of CF can be used in an organoid system to evaluate rare mutations where the drugs may have a positive effect.
Unlike in vitro systems such as human bronchial epithelial (HBE) cells, which are derived from lungs that have been removed from CF patients, or the engineered, rat-derived FRT cell line, the latter has resulted in false positive clinical results, rectal organoids are cultured from tissues obtained through a minimally invasive and painless procedure from donors who then become eligible to participate in a clinical study. Organoids can provide valuable insights for donors, including their likelihood of achieving improvements in pulmonary function and reductions in sweat chloride concentration with CFTR modulators based on the ex-vivo response to those drugs.1
About HIT-CF Europe
HIT-CF Europe is a research project which aims to provide better treatment and better lives for people with cystic fibrosis (CF) and rare mutations. To achieve this, drug candidates are first tested on patient-derived organoids in qualified laboratories across
All participating centers are part of the
To the extent that statements in this release are not historical facts, they are forward-looking statements reflecting the current beliefs and expectations of management made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Words such as "aim," "may," "will," "expect," "anticipate," "estimate," "intend," and similar expressions (as well as other words or expressions referencing future events, conditions or circumstances) are intended to identify forward-looking statements. Examples of forward-looking statements made in this release include, without limitation, statements regarding the expected presentation at an upcoming conference. Forward-looking statements made in this release involve substantial risks and uncertainties that could cause actual results to differ materially from those expressed or implied by the forward-looking statements, and we, therefore cannot assure you that our plans, intentions, expectations or strategies will be attained or achieved. Such risks and uncertainties include, without limitation, our expectations regarding our participation in HIT-CF's pan-European strategic initiative, the potential of our proprietary combination therapies for the treatment of CF, the potential benefit of our proprietary combination therapies to patients, expected timing of patient enrollment in, data from, the completion of, and reporting top line results of our clinical studies and cohorts for our clinical programs, including our planned Phase 2 program and initiation of a pivotal or registrational study, the possibility final or future results from our drug candidate trials (including, without limitation, longer duration studies) do not achieve positive results or are materially and negatively different from or not indicative of the preliminary results reported by the Company (noting that these results are based on a small number of patients and small data set), uncertainties inherent in the execution and completion of clinical trials (including, without limitation, the possibility that
1 Berkers et al, Rectal Organoids Enable Personalized Treatment of Cystic Fibrosis Cell Reports 26, 1701–1708, February 12, 2019
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