Temuco

Researchers are studying Helicobacter pylori infection, the main cause of gastric cancer, in adolescents aged 14-18 years in three regions of Chile. The trial aims to evaluate a "screen and treat" approach to eradicate H. pylori infection in asymptomatic teenagers, assessing its effectiveness and impact on clinical outcomes, serum biomarkers of gastric damage, and the gut microbiome. This research builds on previous findings showing high infection rates acquired early in childhood, with low spontaneous eradication and potential long-term gastric damage if untreated. The study involves screening up to 1000 adolescents with the Urea Breath Test (UBT) to identify persistent H. pylori infection confirmed by at least two positive tests over three months. Persistently infected participants will be randomized in a 2:1 ratio to receive either a 14-day antimicrobial treatment regimen (7 days of lansoprazole and amoxicillin followed by 7 days of lansoprazole, clarithromycin, and metronidazole) or no treatment. A subset of 60 non-infected adolescents will be observed as controls. Participants who remain untreated after six months will be offered eradication therapy. During the trial, adolescents will undergo multiple evaluations including UBT at baseline, one month post-treatment, and every six months thereafter, along with gastroenterological exams, blood samples for gastric damage biomarkers, and stool samples to assess gut microbiota and antimicrobial resistance. The primary outcomes include changes in infection status, gastric disease indicators, and biomarker levels up to six months post-treatment. The study also monitors antimicrobial resistance and gut microbiome changes over 2-3 years, with safety and reinfection rates tracked throughout follow-up.

Researchers are evaluating new treatment options for adults with locally advanced or metastatic colorectal cancer that cannot be removed by surgery and has a specific KRAS G12C gene mutation. This study compares the safety and effectiveness of adding calderasib and cetuximab, both targeted therapies, to a standard chemotherapy regimen called mFOLFOX6. The goal is to see if this combination can help patients live longer without their cancer growing or spreading compared to current treatments that may include mFOLFOX6 with or without bevacizumab. The study has two parts. It involves treatment with calderasib taken as an oral tablet, cetuximab given according to standard procedures, and mFOLFOX6 chemotherapy combining oxaliplatin, leucovorin/levofolinate calcium, and 5-fluorouracil. Some participants may receive bevacizumab or a bevacizumab biosimilar as part of the comparison. The treatments are given following approved dosing schedules. This design allows researchers to assess the safety and tolerability of these drug combinations in treating this type of colorectal cancer with the KRAS G12C mutation. Participants will be monitored for side effects, treatment tolerability, and cancer progression over a period that may last up to about 44 months. Researchers will track outcomes such as how many participants experience dose-limiting toxicities or adverse events, how many stop treatment due to side effects, and progression-free survival time. Assessments include health evaluations, laboratory tests, and imaging to observe cancer status. This long-term follow-up aims to understand both safety and effectiveness of the treatment combinations.

Researchers are investigating sacituzumab tirumotecan (MK-2870) alone or combined with other treatments to treat certain gastrointestinal cancers. These include colorectal cancer that cannot be removed by surgery or has spread, advanced pancreatic ductal adenocarcinoma, and biliary tract cancer. The study aims to understand the safety and tolerability of sacituzumab tirumotecan and measure how many participants respond to the treatment by having their cancer shrink or disappear. Participants may receive sacituzumab tirumotecan by intravenous infusion alone or with other anticancer drugs such as fluorouracil (5-FU), leucovorin or levoleucovorin, cisplatin, and pembrolizumab. Rescue medications like diphenhydramine, H2 receptor antagonists, acetaminophen, dexamethasone, and a steroid mouthwash are given to prevent infusion reactions and oral side effects. Supportive care treatments for side effects, including antidiarrheal and antiemetic agents, are allowed throughout the study. During the study, researchers monitor participants for dose-limiting toxicities within about 4 weeks and track adverse events, treatment discontinuations, and tumor response over up to approximately 63 months. Assessments include safety evaluations and measuring cancer response using standardized criteria. This long-term follow-up helps evaluate both the effectiveness and safety of the treatments being studied.

Researchers are looking for new medicines to prevent HIV-1 (Human Immunodeficiency Virus Type 1) infection. The goals of this study are to learn: * If taking MK-8527 once a month works to prevent HIV-1 infection as well as or better than a standard (usual) pre-exposure prophylaxis (PrEP) taken once a day * About the safety of MK-8527 and if people tolerate it

Researchers are evaluating treatments for breast cancer that is hormone receptor-positive (HR+) and human epidermal growth factor receptor 2-negative (HER2-), specifically in cases where the cancer is either locally advanced and cannot be removed by surgery or has spread to other parts of the body (metastatic). The study aims to determine if patritumab deruxtecan (also called HER3-DXd or MK-1022) helps patients live longer overall or without the cancer growing compared to chemotherapy or trastuzumab deruxtecan. This is a Phase 3 clinical trial focusing on this particular type of breast cancer. Participants receive one of several treatments: patritumab deruxtecan through intravenous infusion, chemotherapy options like paclitaxel or nab-paclitaxel via IV, oral capecitabine tablets, liposomal doxorubicin via IV, or trastuzumab deruxtecan via IV infusion. The study compares the effects of patritumab deruxtecan alone to the treatment chosen by the physician. Treatments are administered according to standard dosing schedules during the trial. During the study, participants are monitored for how long they live without the cancer progressing (up to about 45 months) and overall survival (up to about 85 months). Researchers assess disease status through imaging and other evaluations. Participants have regular check-ups to monitor health, treatment effects, and any side effects. The study tracks treatment response and safety over the extended follow-up period to understand the benefits and risks of the therapies.

Researchers are evaluating the safety, tolerability, and therapeutic effects of a combination treatment using BNT113 and pembrolizumab compared to pembrolizumab alone for patients with unresectable recurrent or metastatic head and neck squamous cell carcinoma (HNSCC) that is positive for human papillomavirus 16 (HPV16+) and expresses the PD-L1 protein with a combined positive score of 1 or higher. This Phase II/III trial includes patients whose cancer cannot be treated with local therapies and who have not received prior systemic anticancer therapy for their current disease condition. The trial consists of two parts. Part A is a non-randomized Safety Run-In Phase to confirm the safety and tolerability of BNT113 combined with pembrolizumab at the selected dose. Part B is a randomized phase that compares BNT113 plus pembrolizumab against pembrolizumab alone as first-line treatment. Patients in Part A continue their treatment without randomization. Treatments are given by intravenous injection or infusion, and patients may receive either combination therapy or monotherapy for up to 24 months. There is also an optional pre-screening phase to test tumor samples for HPV16 DNA and PD-L1 expression before entering the main trial. Participants undergo regular assessments including tumor measurements based on RECIST 1.1 criteria confirmed by independent review. Researchers monitor treatment-emergent adverse events for up to 27 months in Part A and evaluate overall survival and progression-free survival for up to 48 months in Part B. Tumor tissue samples are collected before treatment to confirm eligibility. The study involves ongoing safety monitoring and efficacy evaluations throughout the treatment and follow-up periods.

Researchers are evaluating the safety and effectiveness of combining durvalumab and domvanalimab compared to durvalumab plus placebo in adults with locally advanced (Stage III), unresectable non-small cell lung cancer (NSCLC) whose disease has not worsened after definitive platinum-based concurrent chemoradiation therapy. This Phase III, randomized, double-blind, placebo-controlled, international study involves multiple centers. Participants receive intravenous infusions of durvalumab and domvanalimab or durvalumab and placebo. The treatments are given after patients have completed concurrent platinum-based chemotherapy and radiation therapy with a total radiation dose of approximately 60 Gy. The study monitors patients over time to assess treatment effects and safety. During the study, participants undergo evaluations including tumor tissue analysis for PD-L1 status, performance status assessments, and monitoring of organ and marrow function. The main outcome measured is progression-free survival up to 8 years after randomization. Researchers also monitor for any adverse effects and disease progression throughout the study period.

Researchers are evaluating the long-term safety and tolerability of dazodalibep in adults with Sjögren's Syndrome. This phase 3 open-label extension study focuses on participants who have previously received dazodalibep or placebo in earlier phase 3 trials and completed those studies through Week 48. Participants will receive dazodalibep intravenously during this long-term extension study. The first dose is administered around Week 48 (+28 days) following the prior phase 3 studies. The study monitors safety and tolerability over an extended period to assess treatment-emergent adverse events up to 152 weeks. During the study, participants will undergo regular evaluations to monitor their health and any side effects. Researchers will collect data on adverse events that emerge during treatment. The overall goal is to gather long-term safety information to better understand how participants tolerate dazodalibep when used over an extended time frame.

Researchers are studying the safety and tolerability of budoprutug, a humanized monoclonal antibody that targets CD19 cells, in adults with primary membranous nephropathy (PMN). This Phase 2, open-label, multicenter trial focuses on patients who are anti-PLA2R antibody positive and continue to have proteinuria despite optimized RAAS inhibition. The study aims to evaluate three different intravenous dose regimens of budoprutug and their effects on this specific kidney condition. Participants will receive budoprutug through single intravenous doses on Day 1, Day 15, Day 169, and Day 183 within one of three sequential dose groups. Approximately 45 subjects will be enrolled, each receiving treatment according to their assigned dosing schedule. The study includes a follow-up period through Week 48, with additional monitoring for B-cell recovery as needed. During the study, participants will undergo safety assessments including monitoring for treatment-emergent adverse events up to 48 weeks. Researchers will also evaluate pharmacodynamics and preliminary efficacy through laboratory tests and clinical evaluations. Regular visits will include tests for kidney function, protein levels in urine, and blood cell counts, alongside other health assessments to ensure participant safety and gather data on how the drug affects the disease.

Researchers are evaluating the safety and effectiveness of combining petosemtamab with pembrolizumab compared to pembrolizumab alone as a first treatment for people with recurrent or metastatic PD-L1 positive head and neck squamous cell carcinoma (HNSCC). This Phase 3, randomized, open-label study focuses on patients who have not received previous systemic therapy for incurable recurrent or metastatic disease, though prior therapy for locally advanced disease is allowed under certain conditions. The study excludes patients who have been treated with anti PD-(L)1 or anti-EGFR therapies except in specific cases. Participants will receive either the combination of petosemtamab plus pembrolizumab or pembrolizumab alone as their first-line treatment for this condition. The study includes detailed eligibility criteria based on tumor location, PD-L1 expression, health status, and prior treatments. Treatment effects will be observed over time with a focus on overall survival and tumor response rates measured according to standard criteria. During the study, participants will undergo assessments including tumor biopsies, imaging scans to measure disease progression, heart function tests, and evaluations of organ function. Safety and treatment response will be closely monitored up to approximately three years. The study also tracks overall survival and tumor response rate as primary outcomes, ensuring continuous follow-up and support throughout the trial period.