Alefacept and Allogeneic Hematopoietic Stem Cell Transplantation

Alefacept and Allogeneic Hematopoietic Stem Cell Transplantation for Children With Non-Malignant Diseases Who Have Been Multiply Transfused: a Pilot Study

Allogeneic blood and marrow transplantation remains the only viable cure for children who suffer from many serious non-malignant hematological diseases. Transplantation, however, carries a high risk of fatal complications. Much of the risk stems from the use of high dose radiation and chemotherapy for conditioning, the treatment administered just prior to transplant that eliminates the patients' marrow and immune system, effectively preventing rejection of the donors' cells. Attempts to make blood and marrow transplantation safer for children with non-malignant diseases by using lower doses of radiation and chemotherapy have largely failed because of a high rate of graft rejection.

In many such cases, it is likely that the graft is rejected because the recipient is sensitized to proteins on donor cells, including bone marrow cells, by blood transfusions. The formation of memory immune cells is a hallmark of sensitization, and these memory cells are relatively insensitive to chemotherapy and radiation. Alefacept, a drug used to treat psoriasis, on the other hand, selectively depletes these cells. The investigators are conducting a pilot study to begin to determine whether incorporating alefacept into a low dose conditioning regimen can effectively mitigate sensitization and, thereby, prevent rejection of allogeneic blood and marrow transplants for multiply transfused children with non-malignant hematological diseases.

Study Overview

• Status: Terminated
• Conditions: Sickle Cell Disease; Fanconi Anemia; Thalassemia; Severe Congenital Neutropenia; Wiskott-Aldrich Syndrome; Diamond-Blackfan Anemia; Severe Aplastic Anemia; Glanzmann Thrombasthenia; Leukocyte Adhesion Deficiency; Dyskeratosis-congenita; Chediak-Higashi Syndrome; Chronic-granulomatous Disease; Schwachman-Diamond Syndrome
• Intervention / Treatment: Drug: Alefacept

Detailed Description

There are a large number of serious non-malignant diseases of childhood, most of them congenital and rare, which can be corrected by HSCT. These diseases are all characterized by deficiencies, either in number or in function, of marrow derived cells. These diseases usually affect immune or blood cells and frequently involve transfusion therapy with erythrocytes, platelets or granulocytes. Examples of such diseases include sickle cell disease, thalassemia major, Glanzmann thrombasthenia, Wiskott-Aldrich syndrome, chronic-granulomatous disease, severe congenital neutropenia, leukocyte adhesion deficiency, Shwachman-Diamond syndrome, Diamond-Blackfan anemia, Fanconi anemia, dyskeratosis-congenita, Chediak-Higashi syndrome, and severe aplastic anemia.

Allogeneic blood HSCT, whether performed for a malignant or a non-malignant condition, relies on the use of a pre-transplant conditioning regimen. Traditionally, very high doses of chemotherapy or total body irradiation have been utilized as conditioning. The use of intensive conditioning, which, practically speaking eliminates the host marrow and immune system, however, can produce serious and sometimes fatal infections and injuries to vital organs, such as the liver and lung. In children, the use of intensive conditioning can also produce serious late effects, including hypogonadism, stunted growth, impaired cognitive development and secondary malignancies.

Over the past decade, there has been a move to minimize the risk for such complications by reducing the intensity of conditioning regimens. Added impetus for reducing conditioning intensity arose from the observation in transplantation for thalassemia and sickle cell disease that sustained mixed chimerism, that is partial donor engraftment, is usually sufficient to cure non-malignant diseases. This observation suggested that sustained engraftment could be achieved without "ablation" or elimination of the host marrow. Pre-clinical studies demonstrated in small and large animals that sustained mixed chimerism can be achieved with preparative regimens consisting of TBI doses as low as 100-300 cGy (by comparison, standard intensity regimens typically employ 1000 cGy or more in combination with chemotherapy).

This approach was first translated in a clinical trial involving 45 adults with hematological malignancies who were not candidates for standard conditioning because of older age or serious co-morbidities. Using a single 200 cGy dose of TBI, sustained engraftment was achieved in 80% of cases and, remarkably, transplant related mortality was only 6.7% in this frail group of patients at 14 months. It is also notable that these transplants were performed primarily in the outpatient setting-the median length of hospitalization was 1 day. Low-dose TBI based conditioning has also been safely and effectively utilized for infants and children with severe combine immune deficiency and other severe immune deficiencies, undergoing related and unrelated donor transplantation. This clinical experience strongly suggests that if an effective low-dose TBI conditioning regimen can be developed for children with non-malignant diseases it could transform BMT from a costly, highly morbid, and sometimes life-taking procedure to a relatively inexpensive, safe and well-tolerated one.

Thousands and thousands of children around the world suffer from sickle cell disease and thalassemia major. There is a myriad of other less common serious non-malignant hematological diseases, which have even more devastating effects, for which HSCT remains the only viable cure. Low-dose TBI based conditioning represents a minimally toxic approach to transplantation for these children-a way to overcome alloimmunization, however, is needed to make this approach more effective. Alefacept, the only currently FDA approved agent that specifically targets memory T cells, the investigators believe, holds the key to making low-dose TBI based conditioning more effective and could, thereby, dramatically alter the field of transplantation for non-malignant diseases. sustained donor engraftment needs to be developed.

• Study Type: Interventional
• Enrollment (Actual): 3
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Georgia
    • Atlanta, Georgia, United States, 30322
      • Children's Healthcare of Atlanta

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: No older than 19 years (Child, Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

1. Must be between the ages of 0-21 years at the time of admission for transplant
2. Must have been transfused with at least five platelet, erythrocyte or granulocyte units (partial or full)

3. Must have one of the following diseases:

   (a) hemoglobin SS or hemoglobin SB Sβ0 thalassemia and meet one of the criteria below for having severe sickle cell disease (i) Previous central nervous system event lasting longer than 24 hours, plus objective imaging evidence of CNS vasculopathy, with or without residual neurologic findings (ii) Frequent (≥ 3 per year for 2 years) painful vaso-occlusive episodes (defined as episode lasting ≥ 4 hours and requiring hospitalization or outpatient treatment with parenteral opioids/opiates). Must have also (iii) Recurrent (≥ 3 in lifetime) acute chest syndrome events which have necessitated exchange transfusion or chronic transfusion therapy. (iv) Any combination of ≥ 3 acute chest syndrome episodes and vasoocclusive pain episodes (defined as above) yearly for 3 years. (v) Stage I or II sickle lung disease (see appendix 1) (vi) Pulmonary hypertension, measured by tricuspid regurgitant jet velocity (TRV) of greater than 2.5m/s (vii) Osteonecrosis involving multiple joints. (viii) Sickle Cell nephropathy with moderately severe renal insufficiency estimated GFR ≥30 ml/min, but ≤60 ml/min/1.73 m2 (Requires evaluation by a nephrologist). (b) Thalassemia major (c) Glanzmann thrombasthenia (d) Wiskott-Aldrich syndrome (e) Chronic-granulomatous disease (f) Severe congenital neutropenia (g) Leukocyte adhesion deficiency (h) Shwachman-Diamond syndrome (i) Diamond-Blackfan anemia (j) Fanconi anemia (k) Dyskeratosis-congenita (l) Chediak-Higashi syndrome (m) Acquired (immune; non-inherited, non-congenital) severe aplastic anemia (only patients whose best graft source is a mismatched related donor, unrelated marrow donor or cord blood unit) (n) Other inherited or congenital marrow failure syndromes complicated by severe aplastic anemia (o) Other inherited or congenital red blood cell disorders requiring monthly chronic transfusion therapy. (p) Other inherited or congenital platelet disorders resulting in at least three inpatient hospitalizations in the past two years for bleeding. (q) Other inherited or congenital granulocyte disorders resulting in at least three inpatient hospitalizations in the past two years for infection.

4. Must have an available HLA identical sibling (HLA matched related), a non-HLA identical parent or sibling who is matched at least seven of eight loci (mismatch can be at an allele or antigen level), an unrelated adult donor who is matched at least seven of eight loci (mismatch can be at an allele or antigen level) or an unrelated cord blood unit that is matched at five of six loci (A (antigen level), B (antigen level), DRB1 (allele level)) and provides a minimum pre-cryopreservation TNC dose of 5.0 x 107 TNC/kg recipient weight.

Exclusion Criteria:

1. Hemophagocytic lymphohistiocytosis or other disorder characterized by NK cell dysfunction, since alefacept's effect is mediated by NK cells.
2. Biopsy proven cirrhosis (score IV).
3. SCD chronic lung disease ≥ stage III (see appendix 1)
4. Severe renal dysfunction defined as estimated GFR of <30 ml/min.
5. Severe cardiac dysfunction defined as shortening fraction < 25%.
6. Severe neurologic impairment other than hemiplegia alone, defined as full scale IQ ≤ 70, quadriplegia or paraplegia, inability to ambulate, inability to communicate without assistive device, or any impairment resulting in decline of Lansky performance score to <50%.
7. Karnofsky or Lansky functional performance score < 50%
8. Confirmed HIV seropositivity.
9. Patient with unspecified chronic toxicity serious enough to detrimentally affect the patient's capacity to tolerate bone marrow transplantation.
10. Patient or patient's guardian(s) unable to understand the nature and risks inherent in the BMT process.
11. History of lack of compliance with medical care that would jeopardize transplant course.
12. Patient is pregnant or lactating
13. Donor who for psychological, physiologic, or medical reasons is unable to tolerate a bone marrow harvest or receive general anesthesia.
14. Donor is HIV infected.
15. Donor is pregnant
16. Hemoglobin SS, or hemoglobin Sβ0 thalassemia patient who is eligible for one of the two trials of myeloablative conditioning currently being conducted by the Aflac Center (SALT: Alternate-Donor Bone Marrow and Cord Blood Transplantation for Children with High-Risk Sickle Cell Disease Busulfan, fludarabine, ATG and Reduced-Dose Cyclophosphamide Conditioning for Allogeneic Hematopoietic Stem Cell Transplantation in Patients with Severe Sickle Cell Disease: a pilot study
17. Patients with thalassemia major who are eligible for any multicenter study we are participating in.
18. Patients whose best graft source is a related or unrelated donor/cord blood unit that is mismatched and the patient's HLA antibody testing (see below) demonstrates an antibody directed against the disparate HLA molecule.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Alefacept; Pediatric subjects with non-malignant diseases (NMD) will receive pre-conditioning with alefacept 0.5 mg/kg/dose i.v. with the first dose split on days -40 and -39 and the remaining doses given on days -33, -26, -19, and -12 (e.g. weekly for 5 doses).	Drug: Alefacept; 0.25 mg/kg IV on day -40 and day -39 0.5 mg/kg IV on days -33, -26, -19 and -12 Alefacept was diluted in sterile water (2 ml total volume) and administered via i.v. push followed by a normal saline flush per package insert.; Other Names: Amevive

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Feasibility of Alefacept Pre-conditioning, Measured by Number of Subjects With Full Donor Engraftment	All subjects received alefacept prior to hematopoietic stem cell transplantation and were followed up to at least two years after transplantation to ensure successful engraftment.	Two years post-transplant

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of Participants That Expressed Grade 2 or 3 Regimen-Related Toxicity	Regimen-related toxicity was measured using the Bearman criteria. The Bearman criteria grades toxicity levels at Grade 1, Grade 2, Grade 3, and Grade 4. In this system, grade I toxicity is reversible without treatment and grade 2 is not life threatening, but requires treatment. Grade 3 requires life-support intervention and grade 4 is fatal. All regimen-related toxicities were determined to be unlikely attributable to the study drug.	Day 42 post-transplant
Number of Participants That Expressed Successful Neutrophil Engraftment	Neutrophil engraftment was assessed with absolute neutrophils >500*10^8/kg by 100 days post transplant. Neutrophils were counted by performing a complete blood cell count (CBC).	Day 100 post-transplant
Incidence of Greater Than or Equal to 85% CD3 Donor Chimerism	CD3 chimerism was measured from peripheral blood lymphocytes 30 days post transplant. DNA chimerism analysis was performed by amplified fragment length polymorphism.	Day 30 post-transplant
Incidence of 100% CD33 Donor Chimerism	CD33 chimerism was measured from peripheral blood lymphocytes 30 days post transplant. DNA chimerism analysis was performed by amplified fragment length polymorphism.	Day 30 post-transplant
Number of Participants Who Experienced Acute Graft-versus-host Disease (aGVHD), Measured by NIH Consensus Criteria (NCC) Score: Grade II-IV	Cumulative Incidence of Grade II-IV aGVHD Score at 30 Days. The NIH Consensus grading and severity criteria includes physical assessments of skin, oral cavity, eyes, gynecological and laboratory data and patient reports. Each domain is scored from Grade 0 (no involvement) to Grade IV (severe involvement).	Day 30 post-transplant
Number of Participants Who Experienced Chronic Graft-versus-host Disease (cGVHD), Measured by the NIH Criteria Consensus (NCC)	The severity criteria of chronic graft-versus-host disease (cGVHD) recommended by the NIH Criteria Consensus (NCC) was employed. The number of organs involved and the severity of the disease in these organs dictated the global summary score used to define the disease as mild, moderate, or severe. Mild disease indicates one or two organs involved each with a maximal score of 1. Moderate disease indicates three or more organs involved with a score of 2 in any individual organ, or lung involvement with a score of 1. Severe global GVHD is defined by a score of 3 in any organ, or a lung score of 2.	Day 100 post-transplant

Collaborators and Investigators

• Sponsor: Emory University
• Collaborators: Children's Healthcare of Atlanta
• Investigators: Principal Investigator: John Horan, MD, Emory University/Children's Healthcare of Atlanta

Publications and helpful links

General Publications

• Stenger EO, Chiang KY, Haight A, Qayed M, Kean L, Horan J. Use of Alefacept for Preconditioning in Multiply Transfused Pediatric Patients with Nonmalignant Diseases. Biol Blood Marrow Transplant. 2015 Oct;21(10):1845-52. doi: 10.1016/j.bbmt.2015.06.005. Epub 2015 Jun 19.

Study record dates

Study Major Dates

• Study Start (Actual): September 1, 2010
• Primary Completion (Actual): September 1, 2013
• Study Completion (Actual): September 1, 2013

Study Registration Dates

• First Submitted: September 15, 2010
• First Submitted That Met QC Criteria: March 18, 2011
• First Posted (Estimate): March 22, 2011

Study Record Updates

• Last Update Posted (Actual): July 27, 2017
• Last Update Submitted That Met QC Criteria: July 24, 2017
• Last Verified: July 1, 2017

More Information

Terms related to this study

• Keywords: severe congenital neutropenia; sickle cell disease; Diamond-Blackfan anemia; Fanconi anemia; bone marrow transplant; thalassemia; Glanzmann thrombasthenia; severe aplastic anemia; Wiskott-Aldrich syndrome; chronic-granulomatous disease; leukocyte adhesion deficiency; Schwachman-Diamond syndrome; dyskeratosis-congenita; Chediak-Higashi syndrome
• Additional Relevant MeSH Terms: Digestive System Diseases; Pathologic Processes; Metabolic Diseases; Skin Diseases; Immunologic Deficiency Syndromes; Immune System Diseases; Kidney Diseases; Urologic Diseases; Eye Diseases; Disease; Congenital Abnormalities; Bone Marrow Diseases; Hematologic Diseases; Blood Coagulation Disorders, Inherited; Hemorrhagic Disorders; Genetic Diseases, Inborn; Genetic Diseases, X-Linked; Skin Diseases, Genetic; Eye Diseases, Hereditary; Blood Coagulation Disorders; DNA Repair-Deficiency Disorders; Lipid Metabolism Disorders; Blood Platelet Disorders; Agranulocytosis; Leukopenia; Leukocyte Disorders; Pancreatic Diseases; Anemia, Hemolytic, Congenital; Anemia, Hemolytic; Hemoglobinopathies; Skin Abnormalities; Anemia, Hypoplastic, Congenital; Congenital Bone Marrow Failure Syndromes; Bone Marrow Failure Disorders; Renal Tubular Transport, Inborn Errors; Phagocyte Bactericidal Dysfunction; Primary Immunodeficiency Diseases; Lymphopenia; Red-Cell Aplasia, Pure; Lipomatosis; Albinism; Exocrine Pancreatic Insufficiency; Syndrome; Neutropenia; Anemia; Anemia, Sickle Cell; Fanconi Syndrome; Fanconi Anemia; Granulomatous Disease, Chronic; Thalassemia; Anemia, Aplastic; Wiskott-Aldrich Syndrome; Anemia, Diamond-Blackfan; Dyskeratosis Congenita; Shwachman-Diamond Syndrome; Thrombasthenia; Chediak-Higashi Syndrome; Physiological Effects of Drugs; Immunologic Factors; Dermatologic Agents; Alefacept
• Other Study ID Numbers: IRB00039680; BMT Alefacept (Other Identifier: Other)