Safety and Efficacy of Umbilical Cord Blood Therapy for Cancer Therapy-Induced Thrombocytopenia (CTIT)

NCT07441720 | Recruiting Phase 2

• 1 other identifier: IRB-2026-152
• Study Type: interventional
• Target: 25
• Locations: 1 country
• Sites: 1

Brief Summary

This study is a prospective, single-center, open-label, single-arm clinical trial to assess the safety and efficacy of umbilical cord blood in cancer treatment-induced thrombocytopenia (CTIT) patients. It plans to recruit subjects aged 12 to 65 years old with CTIT. The study involves intravenous infusion of umbilical cord blood, with platelet transfusion as supportive therapy if necessary. The trial consists of three phases: screening (baseline assessments and enrollment), treatment (umbilical cord blood infusion), and follow-up (blood routine tests at Days 3, 7, 14, and 28 post-treatment to record platelet counts, first response time, maximum and minimum values, and calculate efficacy rates while observing changes in thrombocytopenia grading). A total of 25 subjects will be enrolled, and they will undergo evaluation for safety and efficacy based on treatment-related adverse events, GVHD incidence, and hematological improvements.

Conditions

Thrombocytopenia; Cancer Treatment-induced Thrombocytopenia

Keywords

Umbilical cord blood; Cancer treatment-induced thrombocytopenia; CTIT

Outcome Measures

Primary Outcomes (2)

• Treatment efficacy rate

  Treatment efficacy rate: Post-treatment platelet count ≥100×10\^9/L, or an increase of ≥50×10\^9/L from baseline, or an increase of ≥100% from baseline.

  28 days post-infusion

• Treatment-related adverse events

  28 days post-infusion

Secondary Outcomes (5)

• (1)Platelet first response time and maximum and minimum platelet counts;

  28days post-infusion

• Incidence of bleeding events after initial infusion;

  28 days post-infusion

• Number of platelet transfusions;

  28 days post-infusion

• Changes in thrombocytopenia grading;

  28 days post-infusion

• Incidence and grading of graft-versus-host disease (GVHD)

  100 days post-infusion

Study Arms (1)

Umbilical Cord Blood for CTIT Treatment

EXPERIMENTAL

Participants receive intravenous infusion of allogeneic umbilical cord blood (HLA matching 0-3/10 loci, total nucleated cells \[TNC\] \>1×10\^7/kg, ABO blood type identical/compatible). Infusions are administered 2-4 times as needed based on clinical response. Platelet transfusions are permitted as supportive therapy if required. The intervention aims to promote platelet recovery through hematopoietic stem cells, mesenchymal stem cells, endothelial progenitor cells, and associated growth factors in patients with cancer treatment-induced thrombocytopenia (CTIT). No comparator or control arm is included in this single-arm design.

Other: umbilical cord blood

Interventions

umbilical cord blood OTHER

Umbilical cord blood will be selected from a public cord blood bank, requiring an HLA match of 0-3/10, a total nucleated cell (TNC) count \>1 × 10⁷/kg, and ABO blood type identical to the recipient. The umbilical cord blood will be intravenously infused into the subject within 30 minutes.

Umbilical Cord Blood for CTIT Treatment

Eligibility Criteria

• Age: 12 Years - 65 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)

You may qualify if:

• Aged 12 to 65 years at the time of signing the informed consent, regardless of gender.
• Meets the diagnostic criteria for cancer treatment-induced thrombocytopenia (CTIT):Peripheral blood platelet count \< 100 × 10⁹/L; Prior definite exposure to a chemotherapy agent (or tumor-targeted therapy, immunotherapy, or other anti-tumor drugs) known to cause thrombocytopenia, with gradual improvement of thrombocytopenia-related symptoms/signs or normalization of platelet count after discontinuation of the offending drug; Presence or absence of bleeding tendency, such as petechiae, purpura, unexplained epistaxis, or even severe organ/tissue hemorrhage;
• No significant hepatic or renal impairment: ALT and AST ≤ 2.5 × upper limit of normal (ULN), serum creatinine (Cr) and blood urea nitrogen (BUN) ≤ 1.25 × ULN;
• Karnofsky Performance Status (KPS) score ≥ 60 (see Appendix 1), Eastern Cooperative Oncology Group (ECOG) performance status ≤ 2 (see Appendix 2);
• Estimated life expectancy of more than 3 months.

You may not qualify if:

• Use of non-anti-tumor medications known to cause thrombocytopenia (including but not limited to sulfonamides and other drugs);
• Pseudothrombocytopenia induced by ethylenediaminetetraacetic acid (EDTA) anticoagulant;
• Uncontrolled malignant tumor, hypertension, or diabetes mellitus;
• Active infection, including but not limited to known HIV positivity, active hepatitis B or C, or syphilis;
• Poor compliance;
• Known allergy or hypersensitivity to any component of the study intervention (umbilical cord blood or related products);
• Participation in another clinical trial within 1 month prior to enrollment or current participation in another clinical trial;
• Any other condition that, in the investigator's judgment, makes the patient unsuitable for participation in this clinical study.

Sponsors & Collaborators

• Zhejiang Cancer Hospital: lead

Study Sites (1)

Department of Hematology, Zhejiang Cancer Hospital

Hangzhou, Zhejiang, 310000, China

RECRUITING

MeSH Terms

Conditions

Thrombocytopenia

Condition Hierarchy (Ancestors)

Blood Platelet Disorders; Hematologic Diseases; Hemic and Lymphatic Diseases; Cytopenia

Central Study Contacts

Xiaolin Yuan

CONTACT

+86 057188122153; yuanxiaolinhaha@163.com

Study Design

• Study Type: interventional
• Phase: phase 2
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Chief Physician

Model Details: Umbilical cord blood infusion involves cord blood-derived hematopoietic stem cells sourced from the Umbilical Cord Blood Hematopoietic Stem Cell Bank, with HLA typing 0-3/10 matched, total nucleated cells (TNC) \>1×10\^7/kg, and ABO blood type identical to the recipient.

Study Record Dates

• First Submitted: February 23, 2026
• First Posted: March 2, 2026
• Study Start: February 28, 2026
• Primary Completion (Estimated): June 30, 2027
• Study Completion (Estimated): December 30, 2027
• Last Updated: May 11, 2026

Record last verified: 2026-05

Data Sharing

• IPD Sharing: Will not share

Locations

CN (1)