This Clinical Study is to Test Efficacy and Safety of BT595 in Chronic Primary Immune Thrombocytopenia (ITP)

An Open Label, Prospective, Randomized, Multicenter Study Investigating Clinical Efficacy and Safety of the Human Normal Immunoglobulin for Intravenous Administration BT595 in Patients With Chronic Primary Immune Thrombocytopenia (ITP)


Lead Sponsor: Biotest

Collaborator: Syneos Health

Source Biotest
Brief Summary

The main purpose of this study is to assess the efficacy and safety of BT595 in adult subjects with chronic ITP. The primary objective of this study is to determine the rate of subjects with a response. A response is defined as a platelet count of ≥30×10^9/L and at least a 2 fold increase of the baseline count, confirmed on at least 2 separate occasions at least 7 days apart, and the absence of bleeding. The secondary objectives of this study, in addition to further efficacy assessments, are to evaluate the safety of BT595.

Overall Status Completed
Start Date November 2016
Completion Date December 2018
Primary Completion Date December 2018
Phase Phase 3
Study Type Interventional
Primary Outcome
Measure Time Frame
Rate of subjects with response (R) 1 month
Secondary Outcome
Measure Time Frame
The number of subjects with complete response (CR) 1 month
The percentage of subjects with complete response (CR) 1 month
The number of subjects with no response (NR) 1 month
The percentage of subjects with no response (NR) 1 month
The number of subjects with a loss of response 1 month
The percentage of subjects with a loss of response 1 month
Time to Response (R) 1 month
Duration of response (R), 1 month
The number of subjects with response to ≥50×10^9/L 1 month
The percentage of subjects with response to ≥50×10^9/L 1 month
Subject's maximum platelet count achieved 1 month
Time to subject's maximum platelet count 1 month
Time course of platelet count 1 month
Occurrence of bleeding symptoms 1 month
Enrollment 34

Intervention Type: Biological

Intervention Name: BT595

Other Name: Human Immunoglobulin



Main Inclusion Criteria:

- Diagnosis of chronic ITP (>12 months' duration), including diagnosis of refractory ITP, and as defined by the International Working Group (Rodeghiero et al, 2009), where ITP is described as an autoimmune disorder characterized by isolated thrombocytopenia in the absence of other causes or disorders that may be associated with thrombocytopenia

- Treatment is indicated because of a high risk of bleeding or a need to raise the platelet count

- Mean screening platelet count of <30×10^9/L from 3 qualifying platelet counts performed within approximately 7 to 14 days before the start of treatment, with no individual platelet count above 35×10^9/L. The subject may be rescreened if the mean screening platelet count is ≥30×10^9/L. (Note: If a subject is rescreened, all screening laboratory tests must be repeated.)

Main Exclusion Criteria:

- Secondary thrombocytopenia or acquired medical conditions known to be associated with secondary thrombocytopenia, such as chronic lymphocytic leukemia; lymphoma; multiple myeloma; thyroid disease; or other forms of thrombocytopenia, such as drug induced thrombocytopenia; cirrhotic liver diseases; antiphospholipid syndrome; environmental thrombocytopenia; and bone marrow diseases

- Severe concomitant diseases that in the judgment of the investigator will interfere with the study, such as autoimmune hemolytic anemia, acute renal failure, and noncontrolled arterial hypertension

- Laboratory findings (e.g., abnormal laboratory values for hemoglobin, transaminase levels [alanine aminotransferase, aspartate aminotransferase], total bilirubin, creatinine, blood urea nitrogen, and immunoglobulins G, A, M) that preclude participation

- Positive Coombs test (direct and indirect)

- Planned invasive procedures during the time frame of the study

- Maintenance therapy with intravenous immunoglobulins (IVIgs) or infusion of IVIgs within 3 months before start of the study

- Unresponsive to previous IVIg treatment

- Additional therapy with high dose corticosteroids (equivalent to >30 mg prednisone/day), thrombopoietin receptor agonists, and/or immunosuppressives and/or other therapies (e.g., infusion of platelets) within 1 month before the start of the study (Note: Subjects on stable doses of ITP active treatment must not have modified the dose in the preceding 2 weeks and must maintain their prestudy dose during the study. Corticosteroids should not be given as a premedication. Rescue therapy with short courses [i.e., 1 to 4 days] of high dose steroids and IVIgs are allowed up to 2 weeks before study inclusion.)

- History of thrombotic events (including myocardial infarction, cerebral vascular accident [including stroke], pulmonary embolism, and deep vein thrombosis) 6 months before treatment start with BT595 or the presence of significant risk factors for thrombotic events

- Therapy with live attenuated virus vaccines 3 months before start of the study

- Selective, absolute immunoglobulin A (IgA) deficiency or known antibodies to IgA

Gender: All

Minimum Age: 18 Years

Maximum Age: 75 Years

Healthy Volunteers: No

Overall Official
Last Name Role Affiliation
Judit Demeter, MD, PhD, DSc Principal Investigator Semmelweis University Medical School, First Department of Medicine, Department of Hematology, 1083 Budapest, Korányi S. u. 2/a, Hungary
Investigational site # 3597 | Pleven, 5800, Bulgaria
Investigational site # 3593 | Plovdiv, 4000, Bulgaria
Investigational site # 3598 | Sofia, 1431, Bulgaria
Investigational site # 3591 | Sofia, 1756, Bulgaria
Investigational site # 3596 | Varna, 9010, Bulgaria
Investigational site # 4202 | Praha, 10034, Czechia
Investigational site # 4901 | Berlin, 13353, Germany
Investigational Site #4902 | München, 81377, Germany
Investigational site # 3601 | Budapest, 1083, Hungary
Investigational site # 3604 | Debrecen, 4032, Hungary
Investigational site # 3607 | Győr, 9023, Hungary
Investigational site # 3602 | Miskolc, 3529, Hungary
Investigational site # 3603 | Nyiregyhaza, 4400, Hungary
Investigational site # 3606 | Pécs, 7621, Hungary
Investigational site # 3811 | Belgrade, 11000, Serbia
Investigational site # 3813 | Belgrade, 11080, Serbia
Investigational site #3814 | Niš, 18000, Serbia
Investigational site # 3812 | Novi Sad, 21000, Serbia
Investigational site # 3403 | Madrid, 28006, Spain
Investigational site # 3404 | Madrid, 28007, Spain
Investigational site #3401 | Malaga, Spain
Investigational site # 3402 | Palma de Mallorca, 07012, Spain
Location Countries







Verification Date

April 2018

Responsible Party

Type: Sponsor

Has Expanded Access No
Condition Browse
Number Of Arms 2
Arm Group

Label: 2 day treatment schedule

Type: Experimental

Description: Patients will receive a dosage of 1 g/kg bw per day of BT595 for 2 consecutive days

Label: 5 day treatment schedule

Type: Experimental

Description: Patients will receive a dosage of 0.4 g/kg bw per day of BT595 for 5 consecutive days

Patient Data Undecided
Study Design Info

Allocation: Randomized

Intervention Model: Parallel Assignment

Primary Purpose: Treatment

Masking: None (Open Label)