Clinical trial NCT06731023: Efficacy of a 14-Day Bismuth-Containing Quadruple Therapy Guided by Drug Susceptibility Testing in Patients with Extremely Refractory Helicobacter Pylori Infection: an Exploratory Study
Official title: Efficacy of a 14-Day Bismuth-Containing Quadruple Therapy Guided by Drug Susceptibility Testing in Patients with Extremely Refractory Helicobacter Pylori Infection: an Exploratory Study
Study type: OBSERVATIONAL
Overall status: NOT_YET_RECRUITING
Conditions: HELICOBACTER PYLORI INFECTIONS
Keywords: Helicobacter pylori
Bismuth-Containing Quadruple Therapy
Drug Susceptibility Testing
Lead sponsor: Shandong University
Sponsor class: OTHER
First posted: 2024-12-12
Enrollment: 30
Sex: ALL
Minimum age (years): 18
Maximum age (years): 70
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: OTHER
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: The study enrolled patients with extremely refractory Helicobacter pylori (H. pylori) infection, identified in the outpatient department. These patients had previously undergone eradication programs that included three antibiotics with low resistance rates: amoxicillin, tetracycline, and furazolidone. Despite this, reexamination confirmed persistent H. pylori infection. Upon entry into the study, participants were required to fulfill the inclusion criteria, not meet the exclusion criteria, and provide signed informed consent.

Brief summary: Helicobacter pylori (H. pylori) infection, a prevalent global infectious disease, is a significant contributor to gastric cancer and other morbidities, imposing a substantial disease burden. With the rise in antibiotic resistance, the eradication of H. pylori is encountering formidable challenges. A subset of individuals, despite undergoing multiple treatment regimens, remain unable to successfully eradicate the infection. The persistence of infection in these cases could be attributed to either the limitations of detection methods leading to false positives or to the infection by superbugs that are highly resistant to antibiotics. This study is designed to ascertain whether these patients are infected with superbugs by employing various diagnostic techniques. Additionally, it aims to assess the antibiotic resistance profiles of strains associated with extremely refractory H. pylori infections through drug susceptibility testing. Based on the identified sensitivities, the study seeks to tailor treatment protocols with bismuth-containing quadruple therapy (Containing two kinds of antibiotics: sensitive antibiotic, rifabutin or high-dose metronidazole), to explore novel therapeutic strategies for patients with highly resistant H. pylori infections.

Detailed description: The study enrolled patients with extremely refractory Helicobacter pylori (H. pylori) infection, identified in the outpatient department. Following enrollment, a comprehensive diagnostic approach was employed to ascertain the presence of H. pylori infection and to rule out false positives. Patients who test truly positive for H. pylori should undergo eradication therapy, avoiding any previously administered regimens. For those with unsuccessful culture attempts, a bismuth-containing quadruple therapy (vonoprazan + bismuth + amoxicillin + rifabutin) is recommended as an exploratory approach. Patients with successful cultures should undergo drug susceptibility testing to identify antibiotic resistance patterns of the H. pylori strain. Based on these results, a 14-day course of bismuth-containing quadruple eradication therapy is prescribed. Patients with strains that demonstrate sensitivity to both amoxicillin and rifabutin are assigned to the bismuth-containing quadruple therapy group (vonoprazan + bismuth + amoxicillin + rifabutin). For other patients, two non-resistant antibiotics are selected based on drug susceptibility test outcomes. If a patient shows sensitivity to only one antibiotic, a combination of that sensitive antibiotic with high-dose metronidazole is administered. After eradication treatment, 13C urea breath test and fecal antigen detection were re-examined 4 weeks after drug withdrawal.

Eligibility criteria: Inclusion Criteria:

1. Patients aged 18-65.
2. Patients with H.pylori infection (Positive for rapid urease test or 13C urea breath test).
3. Received at least two previous standard treatment protocols for Helicobacter pylori, and the application regimens included at least three low-resistance antibiotics.

Exclusion Criteria:

1. Patients with serious underlying diseases, such as liver insufficiency, renal insufficiency, immunosuppression, malignant tumors, Coronary heart disease or coronary artery stenosis ≥75%.
2. Patients who are pregnant or lactating or unwilling to take contraceptive measures during the trial.
3. Patients with active gastrointestinal bleeding.
4. Patients with a history of upper gastrointestinal surgery.
5. Patients allergic to treatment drugs.
6. Patients with medication history of bismuth agents, antibiotics, proton pump inhibitor and other drugs within 4 weeks
7. Patients with other behaviors that may increase the risk of illness, such as alcohol and drug abuse
8. Patients who are unwilling or incapable to provide informed consents.

Primary outcomes:
measure: Eradication rate
timeFrame: Immediately after follow-up check.
Secondary outcomes:
measure: Rate of adverse reactions.
timeFrame: Immediately after follow-up check.
measure: False positive rate
timeFrame: Immediately after follow-up check.
measure: Patient compliance
timeFrame: Immediately after follow-up check.
measure: Cost-effectiveness index
timeFrame: Immediately after follow-up check.
Other outcomes:
Locations:
city: Jinan
country: China
facility: Qilu Hospital of Shandong University
state: Shandong
Study officials:
References: