Iheya

Researchers are evaluating the efficacy and safety of opevesostat combined with daily corticosteroids compared to alternative treatments abiraterone acetate or enzalutamide in participants with metastatic castration-resistant prostate cancer mCRPC who have previously been treated with one next-generation hormonal agent NHA. The study aims to determine if opevesostat offers better control of disease progression assessed by radiographic progression-free survival, including participants with and without androgen receptor ligand binding domain mutations. Overall survival has also been included as a secondary outcome measure. Participants are randomly assigned to one of two groups. One group receives opevesostat 5 mg orally twice daily, plus dexamethasone 1.5 mg and fludrocortisone acetate 0.1 mg orally once daily, continuing until disease progression. Hydrocortisone is available as a rescue medication if needed. The other group receives either abiraterone 1000 mg once daily with prednisone 5 mg twice daily or enzalutamide 160 mg once daily, also until disease progression. This open-label, phase 3 study compares these two treatment approaches in a parallel design. During the study, participants undergo regular assessments including imaging scans to measure disease progression, safety monitoring, and evaluations of overall survival and quality of life. Researchers track radiographic progression-free survival for up to 52 months and secondary outcomes such as overall survival, time to new treatments, pain progression, and prostate-specific antigen PSA responses for up to approximately 82 months. Participants are closely monitored for adverse events and treatment tolerability throughout the study duration, which spans several years.

Researchers are evaluating the effectiveness, safety, and tolerability of a vaccine designed to reduce Clostridioides difficile C. difficile infections in adults aged 65 years and older. This phase 3 study compares the vaccine to a placebo in a group of older adults who have recent or planned contact with healthcare systems or recent antibiotic use. The purpose is to understand how well the vaccine works to prevent infections and to monitor any side effects or reactions. Participants will receive either the C. difficile vaccine or a placebo shot injected into the upper arm muscle. The study is randomized, double-blinded, and placebo-controlled. The vaccination period includes two doses and participants will be monitored for up to about three and a half years. Follow-up includes three planned clinical visits and three phone visits initially, then yearly clinic visits until the study ends. Participants are asked to report and save stool samples if they experience three or more loose stools in 24 hours to check for possible infection. During the study, researchers will track local and systemic reactions to the vaccine within seven days after each shot, adverse events up to one month after each vaccination, and serious adverse events for up to 18 months after the last dose. The main measurement is the occurrence of medically attended primary C. difficile infections from two weeks after the second vaccination through the surveillance period. Safety monitoring and annual visits will continue until the study is completed, which could be sooner or later depending on infection rates.

Researchers are evaluating the drug opevesostat in a phase 3, randomized, open-label study for men with metastatic castration-resistant prostate cancer mCRPC who have previously been treated with next-generation hormonal agents and taxane-based chemotherapy. The study aims to compare overall survival between participants receiving opevesostat and those receiving alternative treatments, including abiraterone acetate or enzalutamide. The research focuses on participants with specific androgen receptor mutations to determine if opevesostat provides better outcomes. Participants are assigned to one of two groups one group receives opevesostat 5 mg orally twice daily along with dexamethasone and fludrocortisone acetate daily, with hydrocortisone available as rescue medication. The other group receives either abiraterone acetate 1000 mg daily plus prednisone 5 mg twice daily or enzalutamide 160 mg daily. Treatments continue until disease progression, with prior prednisone use replaced by hydrocortisone in later protocol versions. During the study, participants undergo regular assessments including scans and laboratory tests to monitor prostate cancer progression and treatment effects. Researchers measure overall survival and several secondary outcomes such as progression-free survival, response duration, pain progression, and adverse events for up to approximately 54 months. The study also tracks safety and treatment discontinuation, with ongoing evaluations throughout the treatment period and follow-up.