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Extracorporeal leukocytapheresis (LCAP) or granulocytapheresis (GCAP) has been used in the treatment of patients with rheumatoid arthritis and ulcerative colitis and has shown promising safety and efficacy. LCAP and GCAP seem to be effective for steroid-resistant inflammation. The investigators have already reported safety and efficacy of GCAP in refractory asthma and expect the beneficial effect of LCAP in refractory asthma. In this study, in order to improve the therapeutic effect of LCAP by increasing the quantity of leukocytes that were removed, the investigators conducted a clinical study to investigate safety and efficacy of high-dose LCAP performed using a larger filter and an increased dose of the blood volume per body weight treated, as an possible therapy for refractory asthma.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| 1 | Experimental |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Leukocytapheresis | Procedure | 5000 ml, the blood volume per body, treated once. Twice at an interval of 6 days. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Improvement of morning peak flow rate (PEFR) or evening PEFR | 4 weeks after the treatment |
| Measure | Description | Time Frame |
|---|---|---|
| An improved score of asthma control test | 4 weeks after the treatment |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Tamotsu Ishizuka, M.D. | Assistant Professor | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Department Medicine and Molecular Science, Gunma University Graduate School of Medicine | Maebashi | Gunma | 371-8511 | Japan |
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| ID | Term |
|---|---|
| D001249 | Asthma |
| ID | Term |
|---|---|
| D001982 | Bronchial Diseases |
| D012140 | Respiratory Tract Diseases |
| D008173 | Lung Diseases, Obstructive |
| D008171 | Lung Diseases |
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| ID | Term |
|---|---|
| D007937 | Leukapheresis |
| ID | Term |
|---|---|
| D016238 | Cytapheresis |
| D001691 | Biological Therapy |
| D013812 | Therapeutics |
| D001781 | Blood Component Removal |
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| D012130 |
| Respiratory Hypersensitivity |
| D006969 | Hypersensitivity, Immediate |
| D006967 | Hypersensitivity |
| D007154 | Immune System Diseases |
| D047589 |
| Leukocyte Reduction Procedures |
| D002469 | Cell Separation |
| D003584 | Cytological Techniques |
| D019411 | Clinical Laboratory Techniques |
| D008919 | Investigative Techniques |