Clinical Research Directory

A Clinical Study Evaluating the Safety and Preliminary Effectiveness of Induced Pluripotent Stem Cell-derived Platelets in Patients With Thrombocytopenia Caused by Allogeneic Hematopoietic Stem Cell Transplantation

A multicenter open-label study with dose-escalation and multiple expansion cohorts, aimed at evaluating the safety and preliminary efficacy of IPSC-derived platelets in patients with thrombocytopenia caused by allogeneic hematopoietic stem cell transplantation.

Complement (C1q) Binding to HLA Antibodies in a Solid-phase Immunoassay and Clinical Effect on Platelet Transfusion

Background: Platelets are blood cells that help blood clot. Some people have what is called thrombocytopenia. This means they have a low blood platelet count. They need platelet transfusions very often. Human leukocyte antigen (HLA) alloimmunization occurs for a lot of these people. They become refractory. This means their platelet levels no longer increase after transfusions. Researchers want to study a procedure that detects HLA antibodies. They want to test how well it predicts how a person will respond to a transfusion. They want to see if it does this better than the procedure that is usually used. Objective: To study the effect of C1q-binding of Class I HLA antibodies on platelet refractoriness in people who get platelet transfusions. To test if this method better predicts response to platelet transfusion than the IgG solid phase immunoassay method. Eligibility: People enrolled on protocols 11-C-0136, 08-H-0156, 03-C-0277, 01-C-0157, or 01-C-0129 who: Agreed to have their specimens and data used for future research Had Class I HLA antibodies detected by the IgG method Had one or more platelet transfusions at NIH after the first positive HLA IgG antibody result Design: For each participant, researchers will look at a small portion of their archived plasma sample. The samples were left over from prior HLA antibody tests. Participants samples will be analyzed. They will be tested to see if C1q-binding HLA antibodies are present. This will be done by solid phase immunoassay. Results will be compared with the past results of the IgG method. Participants data will be stored in database that s protected by password. ...

Time-limited Treatment With Avatrombopag Pre- and Post-CAR T-cell Therapy to Prevent Post-CAR T-cell Cytopenias

The purpose of this study is to study how avatrombopag (the study drug) may prevent certain side effects in adults with lymphoma and myeloma getting cancer treatment (CAR-T cell therapy). CAR (Chimeric Antigen Receptor) -T cell therapy is a common way to treat lymphoma and myeloma. However, during this kind of cell therapy a patient is at risk of developing lower-than-normal blood cell counts, including: * Red Blood Cells - important for many functions such as moving oxygen from the lungs to the body and moving carbon dioxide (CO2) back to the lungs * White Blood Cells - help fight against infection(s) * Platelets - help stop bleeding by forming clots when there is an injury When a person's platelet counts are lower than normal, this is called "thrombocytopenia". If you have thrombocytopenia, your body has a harder time stopping a bleed when there is an injury to a blood vessel. Thrombocytopenia over time may require additional treatments such as blood transfusions (getting extra platelets). Avatrombopag is a drug that has been shown to increase platelet numbers in people with other kinds of conditions. This study is trying to find out if taking avatrombopag both before and after CAR-T cell therapy will prevent platelet counts from getting too low. This is a research study to see if taking avatrombopag (in the form of pills) before, during, and after CAR-T cell therapy will reduce the chance of having thrombocytopenia as a side effect. This study is for people who are at high risk of thrombocytopenia after CAR T-Cell Therapy.

Role of Viscoelastometric Testing in the Development and Validation of a Clinical-biological Score for Predicting Bleeding in Patients With Malignant Haematological Disorders and Severe Thrombocytopenia

The goal of this single-center, non-controlled, non-randomized exploratory clinical trial is To develop and validate a clinical-biological score (VISCOTHEM score) incorporating viscoelastometric tests parameters; based on an association study, and to establish a threshold that enables the prediction of the immediate risk of bleeding in haematology patients with severe thrombocytopenia (\<20 G/L); with a view to selecting a population with a residual risk of bleeding of zero (NPV ≥ 95%, to achieve a residual probability of bleeding \< 5%). The score may incorporate variables identified in the literature as having a plausible causal relationship with the occurrence of bleeding (14,15), as well as viscoelastometric tests parameters, conventional haemostasis parameters and relevant clinical parameters. . Participants will undergo an additional blood sample to standard care. The total volume of blood drawn will be 21.1 mL. The following analyses will be performed: Quantra®, Rotem®, blood count, platelets, immature platelet count, plasma prothrombin time, activated partial thromboplastin time, International Normalized Ratio, fibrinogen, urea, creatinin, albumin.

Neonatal Thrombocytopenia in the NICU

This prospective cohort study aims to determine the frequency, severity, and clinical outcome of thrombocytopenia among neonates admitted to the neonatal intensive care unit.

Metformin Hydrochloride and Ritonavir in Treating Patients With Relapsed or Refractory Multiple Myeloma or Chronic Lymphocytic Leukemia

This pilot clinical trial studies the side effects and best dose of metformin hydrochloride and ritonavir in treating patients with multiple myeloma or chronic lymphocytic leukemia that has returned after a period of improvement or has not responded to treatment. Metformin hydrochloride and ritonavir may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth.

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

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 75 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.

Efficacy and Safety of Romiplostim N01 for Injection in Promoting Platelet Reconstitution After Allogeneic Hematopoietic Stem Cell Transplantation

This is a prospective, single-center, randomized controlled, investigator-initiated clinical study. The purpose of this study is to evaluate the efficacy and safety of Romiplostim N01 for Injection in promoting platelet reconstitution after allogeneic hematopoietic stem cell transplantation (allo-HSCT). Eligible participants will be randomly assigned in a 2:1 ratio to receive either Romiplostim N01 for Injection (experimental group) or the same treatment with the exception of Romiplostim N01 for Injection (control group).In the experimental group, Romiplostim N01 for Injection will be administered subcutaneously once weekly starting from Day 1 after allo-HSCT, with an initial dose of 3.0 μg/kg and dose titration based on platelet counts, up to a maximum of 10 μg/kg once weekly. Treatment will continue until platelet count exceeds 20×10⁹/L for 7 consecutive days without platelet transfusion, or until lack of efficacy after 4 weeks at 10 μg/kg, or at the investigator's discretion. Participants will enter a safety follow-up period for 28 days after treatment completion, with visits as frequently as weekly to collect adverse events, concomitant medications, and supportive care information. The primary efficacy endpoint is the time to platelet engraftment, defined as the first day of platelet count ≥20×10⁹/L for 7 consecutive days without platelet transfusion.

Platelet-Directed Whole Blood Transfusion Strategy for Malaria

Open-label randomized controlled trial to test the effectiveness of whole blood transfusion for improving survival in children with severe malaria complicated by thrombocytopenia.

Selective Mediterranean Diet in Immune Thrombocytopenia

This randomized controlled trial aims to evaluate the effect of a selective Mediterranean diet regimen, used as an adjunct to standard therapy, on platelet count and bleeding-related outcomes in adult patients with primary immune thrombocytopenia (ITP).

Retrospective Study of Romiplostim for Platelet Engraftment After Allo-HSCT

This is a retrospective observational study evaluating the efficacy and safety of romiplostim for promoting platelet engraftment in patients who underwent allogeneic hematopoietic stem cell transplantation (allo-HSCT) at Tongji Hospital Affiliated to Tongji Medical College of Huazhong University of Science and Technology between January 2025 to May 2026. Medical records were reviewed to collect data on platelet recovery time, transfusion requirements, and adverse events. The primary endpoint was time to platelet engraftment. Secondary endpoints included platelet recovery kinetics, transfusion requirements, transplant-related complications, and safety outcomes.No interventions were assigned as part of this study.

Efficacy and Safety of MegaLT Injection for Platelet Recovery After Umbilical Cord Blood Transplantation

This is a single-arm, early safety and feasibility exploratory study to evaluate the efficacy and safety of MegaLT Injection in promoting platelet recovery after umbilical cord blood transplantation. Adults with malignant hematologic diseases who undergo umbilical cord blood transplantation will receive a single intravenous infusion of MegaLT Injection on day 14 after transplantation. Two dose levels will be evaluated sequentially, and platelet recovery, platelet transfusion requirements, and safety outcomes will be assessed.

EFFECT OF PLATELET CONCENTRATE TRANSFUSION ON MICROCIRCULATORY ENDOTHELIAL FUNCTION IN INTENSIVE CARE UNIT

This study aims to investigate the impact of platelet concentrate (PC) transfusions on endothelial function and the systemic inflammatory response in thrombopenic patients admitted to intensive care who require prophylactic platelet transfusions. Endothelial function will be measured using a laser Doppler device coupled with an acetylcholine iontophoresis system that is applied to the skin.

Romiplostim in Thoracic Transplantation

The investigators developed a platelet transfusion saving strategy based on thrombopoietin administration in heart or lung transplantation (HLT) patients or assist device implantation in bridge-to-transplantation (BTT) or bridge to-decision (BTD). This strategy was applied from May 2014 to October 2015 in patients whose platelet counts were below 100 Giga per liter (G/L). As part of a health care quality improvement project, the investigators evaluated this strategy in a before/after design. January 2010 to December 2013 constituted the before period.

Contribution of Anti-platelet Antibodies Identified With MAIPA Assay in the Demonstration of the Auto-immune Character of a Thrombocytopenia at Diagnosis

Immune thrombocytopenia (ITP) is an autoimmune disease but, paradoxically, and unlike other autoimmune diseases, antiplatelet antibodies are not used either for the diagnosis of the disease or for its prognosis. ITP is a diagnosis of exclusion retained after elimination of other pathologies leading to a thrombocytopenia. No major study has prospectively evaluated the diagnostic value of the presence of anti-platelet antibodies in the etiological investigation of a thrombocytopenia, nor the impact of platelet antibodies on the course of ITP. The gold standard analysis for the determination of platelet antibodies, is the "monoclonal antibody immobilization of platelet antigens" assay (MAIPA), either direct to detect autoantibodies attached to platelets, or indirect to detect circulating antiplatelet antibodies. Therefore, this work aims to study the contribution of the presence of anti-platelet antibodies detected in MAIPA to determine the autoimmune nature of a thrombocytopenia at diagnosis.

Prediction of Platelet Function Using Viscoelastic Test (ROTEM® Sigma) in Obstetric Anesthesia.

This prospective observational, non-interventional, single-center study aims to evaluate whether the viscoelastic parameter PLTEM, derived from ROTEM® sigma testing (EXTEM-A5 minus FIBTEM-A5), can accurately estimate platelet count in obstetric patients with thrombocytopenia and/or severe postpartum hemorrhage. The study will include pregnant women older than 18 years managed during labor and delivery at the Hospital General Universitario Gregorio Marañón, Madrid (Spain). The primary objective is to validate the clinical usefulness of PLTEM as a rapid point-of-care tool to support clinical decision-making regarding neuraxial anesthesia and transfusion management in obstetric emergencies.

Collection of the Thrombo-VaxCov Cohort

In the context of anti-Covid19 vaccination, atypical thrombosis have occured and potential link with vaccination is under investigation. This study collect clinical and biological data of all atypical thrombosis occurring within 4 weeks after antiCovid vaccination.

177Lu-PSMA-617 in Metastatic Castration Resistant Prostate Cancer (mCRPC) With Bone Marrow Involvement and Cytopenia

The purpose of the study is to examine the clinical and biological effects of 177Lu-PSMA-617 in mCRPC patients with cytopenia\[s\].

Bleeding Events Before vs After Lowering Departmental Platelet Transfusion Trigger

Central venous catheters are essential when administering treatment for hematological conditions. Many patients have a decreased platelet count which increases the risk for bleeding complications. Baarle et al. recently published a randomized controlled study where withholding prophylactic platelet transfusions before CVC placement in patients with a platelet count of 10,000 to 50,000 per cubic millimeter did not meet the predefined margin for non-inferiority for postprocedural bleeding events (PMID: 37224197). However, bleedings grade 2 (defined as bleeding that requires external compression) were included despite lacking clinical significance. The aim of the present study is to investigate whether lowering the preprocedural platelet transfusion trigger from 50x10\^9/L to 10x10\^9/L for insertions of central venous catheters remains safe with regards to postprocedural bleeding events of grade 3-4.

Apixaban in Thrombocytopenia

This study is being done to determine the feasibility and safety of using a novel dose adjusted apixaban for the management of participants with cancer-associated venous thromboembolism (blood clot) or and thrombocytopenia (low number of platelets in the blood). Investigators are also looking to see if participants on this treatment have fewer bleeding episodes. The name of the study drug involved in this study is: -Apixiban (a type of anticoagulant)

Managed Access Programs for ETB115, Eltrombopag

The purpose of this registration is to list Managed Access Programs (MAPs) related to ETB115, Eltrombopag

Using Romiplostim to Treat Low Platelet Counts During Chemotherapy in People With Lymphoma

The purpose of this study is to see if the study drug, romiplostim, helps low platelet count caused by standard chemotherapy treatment for lymphoma. This study will also look at whether romiplostim can prevent the need for chemotherapy dose delays, chemotherapy dose reductions, and platelet transfusions. In addition, we will determine how safe it is to give romiplostim to people with lymphoma who have low platelet count from chemotherapy.

Neonatal Platelet Transfusion Threshold Trial

The objective of the NeoPlaTT trial is to test whether, among extremely preterm infants born at 23 0/7 to 26 6/7 weeks' gestation, a lower platelet transfusion threshold, compared to a higher threshold, improves survival without major or severe bleeding up to 40 0/7 weeks' postmenstrual age (PMA).

Luspatercept for Clonal Cytopenias of Uncertain Significance

The purpose of this clinical trial is to test how well the drug luspatercept works in improving low blood cell counts in people with clonal cytopenias of uncertain significance (CCUS). The main questions the study seeks to answer include: * How many patients experience improvements in their low blood counts (red cells, platelets, or white cells) within 24 weeks, based on specific criteria for blood conditions like myelodysplastic syndromes (MDS)? * How long these improvements last before the condition worsens or changes. * The percentage of participants showing improvements at 12, 24, and 48 weeks. * How long it takes for the condition to progress to more severe diseases like myeloid disorders. * How long red blood cell responses last and how quickly these responses are seen. * The average change in hemoglobin levels over 24 weeks. * How many patients need blood transfusions during the study and how soon transfusions are required. * Changes in participants' well-being and energy levels based on a standardized questionnaire. * Monitoring for any side effects, including progression to MDS or leukemia, heart-related issues, or sudden increases in hemoglobin. Participants will: * Receive luspatercept as an injection every three weeks. * Visit the clinic every three weeks for treatment and monitoring.