Comparative Study of Clinical Efficacy and Safety of GNR-069 and Nplate in Patients With ITP

This is an interventional treatment trial for Idiopathic Thrombocytopenic Purpura focused on measuring Idiopathic thrombocytopenic purpura, ITP, Thrombocytopenia, Thrombocytopoiesis, Bleeding, Hemorrhagic syndrome, Petechial rash, Ecchymosis, Fc-peptide, Recombinant DNA technology, Thrombopoietin receptors, Platelet formation, Fc fragment of human immunoglobulin IgG 1, Low platelet count, ITP treatment, Platelets, Haemorrhage, Platelet destruction, Impaired thrombopoiesis, Megakaryocytes, Autoantibodies, Splenectomy, Cytotoxic, T cells, Thrombopoietin receptor agonists, TPO-RAs, romiplostim, Nplate Read More

Inclusion Criteria:

1. Written Informed Consent Form to participate in the study;
2. Men and women aged 18-75 years inclusive at the time of signing the Informed Consent Form;
3. Documented diagnosis of ITP with a disease duration of more than 12 months from the moment of confirmation of the diagnosis by bone marrow aspirate or biopsy results;

4. A. For patients who have not had splenectomy:

   • established absence/loss of response to therapy with at least one drug of fist-line treatment for ITP (which include GCs an IVIG); OR
   • the occurrence of side effects during the course of therapy with the drug of the fist-line, making it impossible to use it further;

   B. For patients who underwent splenectomy:

   • loss/lack of response to splenectomy;

5. Thrombocytopenia ≥30.0 x 109/L - <50.0 x 109/L with severe hemorrhagic syndrome or thrombocytopenia <30.0 x 109/l, regardless of the presence of hemorrhagic syndrome, according to the results of platelet count conducted in a local laboratory for 7 days before the start of therapy with investigational or reference drug;
6. Patients receiving GCs, azathioprine and danazole should receive these drugs in a maintenance dose for at least 4 weeks before starting therapy with investigational or reference drug;
7. Consent of study participants with preserved childbearing function to use reliable methods of contraception (a combination of at least two methods, including 1 barrier method, for example, the use of a condom and spermicide) from the moment of signing the Informed Consent Form and 3 months after the last administration of investigational or reference drug.

Exclusion Criteria:

1. Hypersensitivity to the components of investigational or reference drug or E. coli proteins ;
2. Unresolved severe hemorrhagic syndrome requiring emergency treatment at the time of initiation of study or reference drug therapy ;
3. Fisher-Evans Syndrome;
4. Conditions with a high risk of thromboembolic complications ;
5. Myelodysplastic syndrome and/or bone marrow transplantation in anamnesis;
6. Deviations of clinical and laboratory parameters according to the results of studies of blood samples taken during the screening period;
7. Positive test results for hepatitis B, hepatitis C, or human immunodeficiency virus (HIV);
8. Pregnancy or breastfeeding;

9. Use of drugs:

   • romiplostim used less than 3 weeks before treatment with study or reference drug;
   • IVIG - less than 2 weeks prior to initiation of study or reference drug therapy;
   • eltrombopag - used less than 2 weeks before treatment with study or reference drug, or planned to use eltrombopag while the patient is participating in this study;
   • rituximab - used less than 14 weeks before treatment with study or reference drug, or planned to use rituximab while the patient is enrolled in this study;
   • cyclophosphamide, cyclosporine, vincristine, vinblastine and other drugs used to treat ITP not listed above and not included in the list of drugs approved for use during the study - use less than 8 weeks before the start of therapy with the study or reference drug or the use of any of these drugs is planned during the patient's participation in this study;
   • preparations of any hematopoietic growth factors - use less than 8 weeks before the start of therapy with an investigational or reference drug;
   • Influenza vaccines - less than 21 days prior to start of treatment with study or reference drug;
   • vaccines to prevent novel coronavirus disease (COVID-19) - completion of the vaccination program less than 21 days prior to the start of study or reference drug therapy;
   • other vaccines - less than 8 weeks prior to start of treatment with study or reference drug;
10. Splenectomy within 12 weeks prior to screening;
11. Participation in any clinical trials and/or use of unregistered drugs within 4 weeks prior to screening or 5 drug half-lives (whichever is greater);
12. Any other disease or condition that, in the opinion of the investigator, may preclude the patient from participating in the study.