Herombopag Olamine in the Treatment of Thrombocytopenia After Chemotherapy

An Exploring Single Arm Study on the Efficacy and Safety of Herombopag Olamine in the Treatment of Thrombocytopenia After Chemotherapy in Malignant Tumors of the Digestive System

To evaluate the efficacy and safety of hetrombopag in the treatment of thrombocytopenia after chemotherapy in patients with digestive system malignant tumors

Inclusion Criteria:

1. Volunteer to participate in clinical research and sign informed consent;
2. Age ≥18 years;
3. Digestive system malignancy confirmed by histology or cytology; Having used oxaliplatin combined with fluorouracil for at least one cycle of 21-day chemotherapy regimen (CAPOX or SOX regimen), platelet index after chemotherapy: ≥25×109/L and ≤75×109/L;
4. At least 10 days between TPO, IL-11 or platelet transfusion;
5. ECOG 0 to 2 points;
6. Expected survival time > 3 months;
7. Sufficient organ function for subsequent chemotherapy;
8. Women of reproductive age must be willing to use adequate contraception during the study of drug treatment.

Exclusion Criteria:

1. Thrombocytopenia caused by non-tumor chemotherapy drugs occurred within 6 months before screening, including but not limited to EDTA-dependent pseudothrombocytopenia, hypersplenism, infection, and bleeding;
2. Have any hematological malignancies, including leukemia, myeloma, bone marrow proliferative diseases, lymphoma or bone marrow proliferative diseases;
3. Clinically significant acute or active bleeding within the week prior to screening;
4. Subject has medically known hereditary prethrombotic syndrome (e.g., factor V Leiden mutation, prothrombin G20210A mutation, or hereditary antithrombin III (ATIII) deficiency)
5. The subject has a history of major cardiovascular disease (e.g., congestive heart failure (New York Heart Association Class 3/ cardiac function), known arrhythmias (e.g., atrial fibrillation) that increase the risk of thromboembolic events, coronary stenting, angioplasty, or coronary artery bypass grafting);
6. Subjects had a history of arterial or venous thrombosis within 3 months before screening;
7. Use of a vitamin K antagonist (including low molecular weight heparin, factor Xa inhibitor, or thrombin inhibitor) within 7 days prior to screening;
8. The subject has a history of chronic platelet or hemorrhagic disorders, or thrombocytopenia from causes other than CIT (e.g., chronic liver disease or immune thrombocytopenic purpura);
9. TPO, IL-11 or platelet infusion were used within 10 days before enrollment;
10. Previous use of thrombopoietin receptor agonists (e.g., eltrobopag, romiestine, etc.)
11. Those who cannot be treated with oral drugs;
12. Allergic to hetrombopag or any excipient;
13. Those whose organ function could not tolerate further antitumor therapy as assessed by the investigator; This product is not recommended for use or discontinuation of treatment in patients who meet any of the following criteria for liver function

ALT and AST > 8 x ULN.

ALT or AST>5×ULN for 2 weeks;

ALT or AST>3xULN (total bilirubin >2xULN or INR>1.5);

ALT or AST>3×ULN with progressive fatigue, nausea, vomiting, right upper abdominal pain or tenderness, fever, rash, and/or eosinophilia (>5%).