A Clinical Study of Hetrombopag for Prevention of Thrombocytopenia Induced by Gemcitabine Plus Cisplatin in the Treatment of Nasopharyngeal Carcinoma

A Single-Arm, Exploratory, Self-Controlled Clinical Study of Hetrombopag for Secondary Prevention of Thrombocytopenia Induced by Gemcitabine Plus Cisplatin in the Treatment of Nasopharyngeal Carcinoma

This study is a single-arm, exploratory, self-controlled clinical trial for the prevention of thrombocytopenia induced by gemcitabine plus cisplatin in the treatment of nasopharyngeal carcinoma. It aims to investigate the efficacy and safety of hetrombopag for the secondary prevention of thrombocytopenia caused by gemcitabine plus cisplatin in patients with nasopharyngeal carcinoma. The study protocol has been reviewed and approved by the Institutional Ethics Committee of Fujian Cancer Hospital, allowing the conduct of this clinical study.

Study Overview

• Status: Not yet recruiting
• Conditions: Nasopharyngeal Carcinoma (NPC); CTIT-Chemotherapy Induced Thrombocytopenia
• Intervention / Treatment: Drug: herombopag olamine tablets

• Study Type: Interventional
• Enrollment (Estimated): 35
• Phase: Phase 2

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• 1. Aged 18 to 75 years old, regardless of gender;
• 2. Patients with nasopharyngeal carcinoma confirmed by pathological or cytological examination;
• 3. Currently receiving treatment with the Gemcitabine + Cisplatin (GP) regimen at a 21-day cycle, with the lowest platelet count < 75×10⁹/L in the previous chemotherapy cycle, and expected to maintain the same chemotherapy regimen for at least 2 more cycles;
• 4. Estimated survival time ≥ 12 weeks;
• 5. Eastern Cooperative Oncology Group (ECOG) Performance Status (PS) score of 0-2;

• 6. Laboratory test indicators meeting the following requirements:

  1. Absolute Neutrophil Count (ANC) > 1.0×10⁹/L, Hemoglobin (Hb) > 80 g/L;
  2. Renal function: Creatinine (Cr) ≤ 1.5 × Upper Limit of Normal (ULN) or estimated Glomerular Filtration Rate (eGFR) ≥ 60 ml/min (calculated by the Cockcroft-Gault formula);
  3. Liver function: Total Bilirubin (TBIL) ≤ 1.5 × ULN; Alanine Aminotransferase (ALT) and Aspartate Aminotransferase (AST) ≤ 3 × ULN; (If the patient has intrahepatic cholangiocarcinoma or liver metastasis, total bilirubin ≤ 3 × ULN and transaminases ≤ 5 × ULN);
  4. Coagulation function: International Normalized Ratio (INR) of Prothrombin Time (PT) ≤ 1.5 × ULN, and Activated Partial Thromboplastin Time (APTT) within the normal range;
• 7. Females of childbearing potential must agree to use contraception during the study and for 6 months after the study ends; non-lactating females are eligible. Males must agree to use contraception during the study and for 6 months after the study ends;
• 8. No participation in other clinical trials of drugs within 4 weeks prior to enrollment;
• 9. Subjects must understand the study details and voluntarily sign the Informed Consent Form (ICF);
• 10. No severe complications such as active massive gastrointestinal bleeding, perforation, jaundice, gastrointestinal obstruction, or non-cancerous fever > 38℃;
• 11. Expected to have good compliance and be able to complete follow-up for efficacy and adverse reactions as required by the protocol.

Exclusion Criteria:

• 1. Thrombocytopenia not caused by cancer therapy occurring within 6 months prior to screening, including but not limited to hepatic cirrhosis with hypersplenism, infection, and bleeding;
• 2. Having other hematopoietic system diseases besides chemotherapy-induced thrombocytopenia, including leukemia, primary immune thrombocytopenia (ITP), myeloproliferative diseases (MPDs), multiple myeloma (MM), myelodysplastic syndromes (MDS), etc.;
• 3. Complicated with bone marrow involvement or bone marrow metastasis;
• 4. Having received pelvic, spinal radiotherapy or large-field bone irradiation within 3 months prior to screening;
• 5. History of any arterial or venous thrombosis occurring within 6 months prior to screening;
• 6. Clinical manifestations of severe bleeding (such as gastrointestinal bleeding) within 2 weeks prior to screening;
• 7. Severe cardiovascular diseases (e.g., NYHA Cardiac Function Classification Grade III-IV) within 6 months prior to screening, or patients with arrhythmias known to increase thromboembolic risk (such as atrial fibrillation [AF]), history of coronary artery stenting, angioplasty, or coronary artery bypass grafting (CABG);
• 8. Brain tumor or brain metastasis;
• 9. Having received platelet transfusion within 2 days prior to enrollment;
• 10. Having received treatment with recombinant human thrombopoietin (rhTPO), recombinant human interleukin-11 (rhIL-11), or thrombopoietin receptor agonist drugs (such as eltrombopag, avatrombopag) within 5 days prior to screening;
• 11. Patients with known or anticipated allergy or intolerance to the active ingredient or excipients of Hetrombopag Ethanolamine Tablets (excipients include: cellulose-lactose, low-substituted hydroxypropyl cellulose [L-HPC], magnesium stearate, film-coating premix);
• 12. Pregnant or lactating women;
• 13. Patients deemed ineligible for enrollment by the investigator.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Prevention
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

Experimental: Secondary Prevention Cohort

Drug: herombopag olamine tablets; Oral Hetrombopag Olamine Tablets will be initiated at a daily dose of 5 mg (initial dose) on Day 1 (D1) of each chemotherapy cycle, and administered continuously until the start of the next chemotherapy cycle. During the oral administration period, blood routine examinations of subjects will be collected every 3-5 days, and the dosage of hetrombopag will be adjusted according to the Platelet Count (PIT). The dosage adjustment rules are as follows: When PLT ≥ 100 × 10⁹/L, discontinue administration; When 50 × 10⁹/L ≤ PLT < 100 × 10⁹/L, increase the daily dose by 2.5 mg; When PLT < 50 × 10⁹/L, increase the daily dose by 5 mg; Note: When the platelet count is < 10.0 × 10⁹/L or there is a bleeding risk, rescue measures such as platelet transfusion may be considered based on clinical practice.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Incidence Rate of Grade 3 or Higher Cancer Therapy-Induced Thrombocytopenia (CTIT)	From the initiation of oral drug administration to 30 days after the last dose of the oral drug

Collaborators and Investigators

• Sponsor: Fujian Cancer Hospital

Study record dates

Study Major Dates

• Study Start (Estimated): November 30, 2025
• Primary Completion (Estimated): May 30, 2028
• Study Completion (Estimated): November 30, 2028

Study Registration Dates

• First Submitted: November 16, 2025
• First Submitted That Met QC Criteria: November 19, 2025
• First Posted (Actual): November 26, 2025

Study Record Updates

• Last Update Posted (Actual): November 26, 2025
• Last Update Submitted That Met QC Criteria: November 19, 2025
• Last Verified: November 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Stomatognathic Diseases; Neoplasms by Site; Neoplasms; Neoplasms by Histologic Type; Head and Neck Neoplasms; Neoplasms, Glandular and Epithelial; Carcinoma; Otorhinolaryngologic Diseases; Pharyngeal Neoplasms; Otorhinolaryngologic Neoplasms; Nasopharyngeal Diseases; Pharyngeal Diseases; Nasopharyngeal Neoplasms; Nasopharyngeal Carcinoma
• Other Study ID Numbers: HQBP01

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No