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Proton Pump Inhibitor Prevent Dual Antiplatelet Agents Induced Gastrointestinal Ulcer After Coronary Artery Bypass Graft (DACAB-GI-2)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT03038009
Recruitment Status : Withdrawn (A new registration has been submitted due to a redesign of the study protocol.)
First Posted : January 31, 2017
Last Update Posted : April 9, 2019
Information provided by (Responsible Party):
Lifen YU, Ruijin Hospital

Brief Summary:
The purpose of this study is to determine whether 12-month prophylactic treatment with pantoprazole is superior to 1-month therapy without major cardiovascular events (MACE) increased significantly, in prevention of dual antiplatelet therapy (DAPT)-induced upper gastrointestinal (GI) mucosal injury after coronary artery bypass graft (CABG) surgery. The potentially serious harm of DAPT on gastroduodenal mucosa will be assessed by esophagogastroduodenoscopy (EGD).

Condition or disease Intervention/treatment Phase
Gastric Ulcer Induced by Antiplatelet Agent Ulcer of the Gastrointestinal Tract Proton Pump Inhibitor Drug: Pantoprazole Phase 4

Detailed Description:

Endoscopic evaluation of gastroduodenal mucosal injury:

Based on the modified Lanza score, the new endoscopic evaluation system established in the DACAB-GI-1 study includes 6 grades of mucosal injuries. Grade 0: normal mucosa; Grade 1: erythema or petechiae only; Grade 2: 1 to 2 erosive lesions; Grade 3: 3 to 10 erosive lesions; Grade 4: more than 10 erosive lesions or small ulcers (diameter: 3-5mm); Grade 5: an ulcer is greater than 5 mm in diameter. Comprehensive results of gastroduodenal mucosal injury will be marked as G0-5 (G: gastro) and D0-5 (D: duodeno) together. Mild injury was defined as level II or less. Severe injury was defined from level III to V, which should be treated with proton pump inhibitor (PPI) to decrease the risk of upper GI bleeding. The new level system is as following: Level 0: G0D0; Level I: G1D0-1/G0D1; Level II: G2D0-2/G0-1D2; Level III: G3D0-3/G0-2D3; Level IV: G4D0-4/G0-3D4; Level V: G5D0-5/G0-4D5.

Sample size justification:

Until now, no published data or reference is available for the efficacy of pantoprazole when concomitant use with DAPT. The results from the preliminary study (DACAB-GI-1) showed that the percentage of serious gastroduodenal mucosal lesions (Level III-V) in patients treated with PPIs for 1, 3 and more than 6 months were 36.76%, 28.45% and 17.65%, respectively. Therefore, the efficacy difference of pantoprazole is estimated to be 18% between 2 groups. The average incidence of gastroduodenal mucosal injury is estimated to be 36% in the control group (1-month therapy of pantoprazole), and the corresponding incidence in the experimental group (12-month therapy of pantoprazole) is estimated to be 18%.

The determination of minimal sample size is as following: Group sample sizes of 93 in the experimental group and 93 in the control group achieve 80% power to detect a difference between the group proportions of -18%. The proportion in the experimental group is assumed to be 36% under the null hypothesis and 18% under the alternative hypothesis. The proportion in the control group is 36%. The test statistic used is Pearson Chi-Squared test. The significance level of the test was targeted at 0.05. The significance level actually achieved by this design is 0.0522. Considering 10% of the lost and/or drop-out rate, the final sample size estimated will be 104 in the experimental group and control group, respectively. The total sample size is no less than 208.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 0 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: Evaluation of the Efficacy and Safety of Different Duration of Proton Pump Inhibitor for Prevention of Upper Gastrointestinal Mucosal Injury in Patients Taking 12-month Dual Antiplatelet Therapy After Coronary Artery Bypass Graft Surgery
Estimated Study Start Date : October 2018
Estimated Primary Completion Date : September 2020
Estimated Study Completion Date : December 2020

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Active Comparator: One-month therapy
Pantoprazole, 40mg, tablet, oral, once daily for 1 month.
Drug: Pantoprazole
Pantoprazole (40mg qd) will be concomitant used with DAPT
Other Name: PANTOLOC, Tablet from Takeda Pharmaceutical Company Limited

Experimental: Twelve-month therapy
Pantoprazole, 40mg, tablet, oral, once daily for 12 months.
Drug: Pantoprazole
Pantoprazole (40mg qd) will be concomitant used with DAPT
Other Name: PANTOLOC, Tablet from Takeda Pharmaceutical Company Limited

Primary Outcome Measures :
  1. Cumulative incidence of gastroduodenal erosions and ulcers. [ Time Frame: up to 12 months ]

Secondary Outcome Measures :
  1. Incidence of gastroduodenal erosions and ulcers. [ Time Frame: up to 6 months ]
  2. Incidence of upper GI major bleeding according to TIMI criteria. [ Time Frame: up to 12 months ]
  3. Incidence of upper GI minor bleeding according to TIMI criteria [ Time Frame: up to 12 months ]
  4. Incidence of major cardiovascular events (MACE, composite of cardiovascular death, myocardial infarctions, or stroke). [ Time Frame: up to 12 months ]
    Safety Issue: Yes

  5. Incidence of grafts failure. [ Time Frame: up to 12 months ]
    Safety Issue: Yes

Information from the National Library of Medicine

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Ages Eligible for Study:   30 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

Each patient should meet all of the inclusion criteria and none of the exclusion criteria for this study:

  1. Provision of informed consent prior to any study specific procedures.
  2. CABG surgery is performed for the first time.
  3. Need 12-month DAPT (aspirin 100mg qd plus clopidogrel 75mg qd or aspirin 100mg qd plus ticagrelor 90mg bid depending on randomisation) immediately following CABG surgery according to the guideline.
  4. Concomitant use of pantoprazole (40mg qd) for at least 1 moth following CABG surgery.
  5. Willing to undergo EGD twice a year (at 6th and 12th month following CABG surgery, respectively).
  6. Willing to undergo 13C-UBT prior to CABG surgery.

Exclusion Criteria:

Patients should not enter the study if any of the following exclusion criteria are fulfilled.

  1. History of previous active peptic ulcer within 3 months prior to enrollment.
  2. Planned use of PPI to treat gastric-acid associated diseases (e.g. gastroesophageal reflux disease, GERD)
  3. Contraindications for aspirin, clopidogrel, ticagrelor and pantoprazole use (e.g. known allergy)
  4. Anticipated concomitant oral or intravenous therapy with strong cytochrome P450 3A4 (CYP3A4) inhibitors or CYP3A4 substrates with narrow therapeutic indices, that cannot be stopped for the course of the study.

    • Strong inhibitors: ketoconazole, itraconazole, voriconazole, telithromycin, clarithromycin, nefazadone, ritonavir, saquinavir, nelfinavir, indinavir, atazanavir
    • CYP3A4 substrates with narrow therapeutic index: quinidine, simvastatin at doses > 40mg daily or lovastatin at doses > 40mg daily.
  5. Need for chronic oral anticoagulant therapy or chronic low-molecular-weight heparin.
  6. History of previous intracerebral bleeding at any time, GI bleeding within the past 3 months prior to enrollment, or major surgery within 30 days prior to enrollment.
  7. Known moderate to severe liver disease (e.g. gastroesophageal varices, ascites and/ or clinical signs of coagulopathy)
  8. Renal failure requiring dialysis.
  9. Women of child-bearing potential who are not willing to use a medically accepted method of contraception that is considered reliable in the judgement of investigator OR women who have a positive pregnancy test at enrolment or randomisation OR women who are breasting-feeding.
  10. Inability of patient to understand and/or comply with study procedures and/or follow up, in the opinion of the investigator, OR any conditions that, in the opinion of the investigator, many render the patient unable to complete the study.
  11. Any condition which in the opinion of the investigator would make it unsafe or unsuitable for the patient to participate in this study (eg, long-term concomitant treatment with non-steroidal anti-inflammatory drugs [NSAIDs]), or any condition outside the atherothrombotic study area with a life expectancy of less than 2 years based on investigator's judgement.
  12. Paticipation in another clinical study with an investigational product within 28 days prior to enrolment or previous randomization to an investigational product in another ongoing clinical study. Participation in any previous study with clopidogrel or tigagrelor.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03038009

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Ruijin Hospital, Shanghai Jiao Tong University School of Medicine
Shanghai, China, 200025
Sponsors and Collaborators
Ruijin Hospital
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Principal Investigator: Lifen Yu, MD, Ph.D Ruijin Hospital

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Responsible Party: Lifen YU, Associate Professor, Department of Gastroenterology, Ruijin Hospital Identifier: NCT03038009     History of Changes
Other Study ID Numbers: IISR-2016-101603
First Posted: January 31, 2017    Key Record Dates
Last Update Posted: April 9, 2019
Last Verified: April 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No

Keywords provided by Lifen YU, Ruijin Hospital:
Coronary Artery Bypass Graft
Dual Antiplatelet Therapy
Mucosal Injury
Proton Pump Inhibitor

Additional relevant MeSH terms:
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Stomach Ulcer
Peptic Ulcer
Pathologic Processes
Duodenal Diseases
Intestinal Diseases
Gastrointestinal Diseases
Digestive System Diseases
Stomach Diseases
Proton Pump Inhibitors
Anti-Ulcer Agents
Gastrointestinal Agents
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action