Active clinical trials for "Thrombocytopenia"

Chemotherapy is an important treatment strategy for gynecological malignancies, such as ovarian cancer, advanced endometrial cancer, cervical cancer. Chemotherapy-induced thrombocytopenia (CIT) is one of the most common chemotherapy-related hematologic toxicities and can increase the risk of bleeding, prolong hospital stays, increase healthcare costs, and, in severe cases, death. It can lead to a reduction in the intensity of chemotherapy doses, delay the next cycle of chemotherapy, or even termination of treatment, thereby affecting the antitumor effect and adversely affecting the long-term survival of these patients. Literature and our data show that when patients develop grade II or worse CIT, the incidence of grade II and above CIT after the next cycle of chemotherapy is 85-92%. Hetrombopag is one of the thrombopoietin receptor agonist (TPO-RA) that has been studied to explore its role in the treatment and prevention of CIT in multiple solid tumors. In order to find out the secondary prevention efficacy of CIT, it is planned to carry out this single-arm prospective study by recruiting 48 patients with gynecological malignancies with grade II CIT or above after chemotherapy, whose platelets has returned to normal after the routine clinical intervention, and then plan to have the next cycle of chemotherapy. The intervention strategy is taking hetrombopag 5mg/day within 24 hours after chemotherapy, then observe the incidence rate of grade II CIT. The endpoint of this study is to assess the effectiveness and safety of hetrombopag for preventing CIT in patients with gynaecological malignancies.

Current first line treatments for immune thrombocytopenia (ITP) usually have transient effects and prolonged platelet response rate off therapy remains low. The aim is to evaluate whether a 12-week course of eltrombopag plus pulsed dexamethasone as first line therapy can increase the proportion of patients with prolonged response. Diagnosis of ITP is established according to the American Society of Hematology guidelines. Eligible ITP subjects have platelet counts <30×109/L or counts <50×109/L and significant bleeding symptoms (WHO bleeding scale 2 or above). Subjects must have no prior ITP treatment except platelet transfusions. Treatment consists of eltrombopag 25-75 mg daily according to platelet response for 12 weeks plus pulsed dexamethasone, 40 mg daily for 4 consecutive days every 4 weeks for 1-3 courses. The primary endpoint is prolonged response rate which was defined as the proportion of enrolled subjects maintaining platelet counts >50×109/L for more than 6 months without any ITP therapy after completion of 12-week therapy.

Study the effect of acetylcysteine on decreasing the incidence of LIT in critically ill patients. Study the impact of acetylcysteine on the time to onset of LIT and the time to recovery of platelets.

The study is being conducted to validate the clinical performance of the T-TAS 01 HD assay for measurement of thrombogenicity in patients with thrombocytopenia receiving a platelet transfusion.

Multicenter retrospective and prospective observational study based on the collection of sequential anonymized data from principal Italian ITP centers, to describe the clinical course of ITP patients becoming infected by SARS-CoV-2 and of COVID-19 patients developing de novo ITP.

Thrombocytopenia is an important pathological feature of HFRS（Hemorrhagic Fever With Renal Syndrome, HFRS）. However, the cause of thrombocytopenia in HFRS is not yet fully understood. Neutrophils, as the largest number of white blood cells in the human body, can widely participate in the immune process of viral infections. Previous studies have found that the neutrophils of patients with acute myocardial infarction can interact with activated platelets and further mediate platelet phagocytosis.Therefore, this study aims to systematically elucidate the immunological process of neutrophil mediated thrombocytopenia in patients with HFRS by exploring the correlation between platelet activation, neutrophil activation and neutrophil proportion of adherent / phagocytic platelets peripheral blood of HFRS patients, and to analyze its relationship with the course of HFRS disease, which lays a theoretical foundation for further understanding the pathogenesis of HFRS and provides a basis for clinical use.

Platelets are essential blood elements to maintain hemostasis. Quantitative or qualitative defects can be responsible of hemorrhagic (platelet disorders) or thrombotic (heparin induced thrombocytopenia [HIT]) troubles. Diagnosis of these pathologies is sometimes urgent and consists in delicate platelet functional assays that are mostly made in expert centers. These platelets functional assays measure platelets activation and/or aggregation in response to diverse inductors and may lack sensitivity. The investigators would like to propose a new diagnostic tool with the use of imaging flow cytometry which provides much more information than classic cytometer on cell morphology thanks to images collected by the optical channel of the ImageStream cytometer. The use of this cytometer offers an innovative approach. This study is a monocentric prospective and non-interventional study. The investigators will analyze patient samples with the ImageStream cytometer and reference laboratory tests (light transmission aggregometry and serotonin release assay) in parallel and compare results from the different techniques. This new diagnostic technique will demonstrate a non-inferiority diagnosis compared to reference tests and maybe a better sensibility.

Prospective registry study for children and young adults with severe immune cytopenias (persisting/chronic immune thrombocytopenia, autoimmune hemolytic anemia, and Evans syndrome) to improve the management, facilitate the differential diagnostic work-up, and document the clinical course under various treatments. Time points: at inclusion, after 6 months, after 12 months, then yearly up to 4 years after inclusion. No intervention, mere observation and documentation. Guided pre-inclusion (differential) diagnostic work-up.

From 2004, OBS'CEREVANCE is a national real-world prospective clinical cohort of patients with auto-immune cytopenia of pediatric-onset : Immune thrombocytopenia (ITP), Autoimmune Hemolytic anemia (AIHA), or Evans syndrome (all bi or tri cytopenias). Thanks to the collaboration of the 30 French pediatric hematologic centers, this cohort supports all of the Rare Disease Centre CEREVANCE (Centre de Référence National des Cytopénies Auto-Immunes de l'Enfant) missions for care, education and research. Specifically, this original unbiased database allows to describe the long-term health of adult patients, to identify the heterogenous genetic underlying pathophysiologic contexts, and to study the benefit-risk balance of treatments, including the growing development of targeted therapies.

Immune thrombocytopenia (ITP) is an autoimmune disease characterized by low platelet counts with or without mucocutaneous bleeding (McMillan, 2007). Like the majority of autoimmune diseases, ITP is an organ-specific disease, and abnormalities in the regulation of the immune system have been shown to play an important role in the initiation and/or perpetuation of the disease (McKenzie et al.,2013). Still, immune thrombocytopenia (ITP) is a significant clinical problem due to chronicity, treatment cost, occurrence mainly in, young, and relatively poorer quality of life