Abstract
Peripheral blood stem cell transplantation (PBSCT) offers a curative option for sickle cell disease (SCD). Although HLA-matched sibling transplantation is promising, the vast majority of patients lack such a donor. We sought to develop a novel nonmyeloablative HLA-haploidentical PBSCT approach that could safely be used for patients with severe organ damage. Based on findings in our preclinical model, we developed a phase 1/2 trial using alemtuzumab, 400 cGy total body irradiation, and escalating doses of posttransplant cyclophosphamide (PT-Cy): 0 mg/kg in cohort 1, 50 mg/kg in cohort 2, and 100 mg/kg in cohort 3. A total of 21 patients with SCD and 2 with b-thalassemia received a transplant. The mean hematopoietic cell transplant–specific comorbidity index of 6 reflected patients with cirrhosis, heart failure, and end-stage renal disease. The engraftment rate improved from 1 (33%) of 3 in cohort 1 to 5 (63%) of 8 in cohort 2 and 10 (83%) of 12 in cohort 3. Percentage of donor myeloid and CD3 chimerism also improved with subsequent cohorts. There was no transplant-related mortality, and overall survival was 87%. At present, 0% in cohort 1, 25% in cohort 2, and 50% in cohort 3 remain free of their disease. There was no grade 2 to 4 acute or extensive chronic graft-versus-host disease (GVHD). Therefore, PT-Cy improves engraftment and successfully prevents severe GVHD after nonmyeloablative conditioning in patients with SCD who are at high risk for early mortality. Additional strategies are necessary to decrease the graft rejection rate and achieve a widely available cure for all patients with SCD.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 652-661 |
| Number of pages | 10 |
| Journal | Blood Advances |
| Volume | 1 |
| Issue number | 11 |
| DOIs | |
| State | Published - Apr 25 2017 |
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ASJC Scopus subject areas
- Hematology
Cite this
Cyclophosphamide improves engraftment in patients with SCD and severe organ damage who undergo haploidentical PBSCT. / Fitzhugh, Courtney D.; Hsieh, Matthew M.; Taylor, Tiffani; Coles, Wynona; Roskom, Katherine; Wilson, Delon; Wright, Elizabeth; Jeffries, Neal; Gamper, Christopher; Powell, Jonathan; Luznik, Leo; Tisdale, John F.
In: Blood Advances, Vol. 1, No. 11, 25.04.2017, p. 652-661.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Cyclophosphamide improves engraftment in patients with SCD and severe organ damage who undergo haploidentical PBSCT
AU - Fitzhugh, Courtney D.
AU - Hsieh, Matthew M.
AU - Taylor, Tiffani
AU - Coles, Wynona
AU - Roskom, Katherine
AU - Wilson, Delon
AU - Wright, Elizabeth
AU - Jeffries, Neal
AU - Gamper, Christopher
AU - Powell, Jonathan
AU - Luznik, Leo
AU - Tisdale, John F.
PY - 2017/4/25
Y1 - 2017/4/25
N2 - Peripheral blood stem cell transplantation (PBSCT) offers a curative option for sickle cell disease (SCD). Although HLA-matched sibling transplantation is promising, the vast majority of patients lack such a donor. We sought to develop a novel nonmyeloablative HLA-haploidentical PBSCT approach that could safely be used for patients with severe organ damage. Based on findings in our preclinical model, we developed a phase 1/2 trial using alemtuzumab, 400 cGy total body irradiation, and escalating doses of posttransplant cyclophosphamide (PT-Cy): 0 mg/kg in cohort 1, 50 mg/kg in cohort 2, and 100 mg/kg in cohort 3. A total of 21 patients with SCD and 2 with b-thalassemia received a transplant. The mean hematopoietic cell transplant–specific comorbidity index of 6 reflected patients with cirrhosis, heart failure, and end-stage renal disease. The engraftment rate improved from 1 (33%) of 3 in cohort 1 to 5 (63%) of 8 in cohort 2 and 10 (83%) of 12 in cohort 3. Percentage of donor myeloid and CD3 chimerism also improved with subsequent cohorts. There was no transplant-related mortality, and overall survival was 87%. At present, 0% in cohort 1, 25% in cohort 2, and 50% in cohort 3 remain free of their disease. There was no grade 2 to 4 acute or extensive chronic graft-versus-host disease (GVHD). Therefore, PT-Cy improves engraftment and successfully prevents severe GVHD after nonmyeloablative conditioning in patients with SCD who are at high risk for early mortality. Additional strategies are necessary to decrease the graft rejection rate and achieve a widely available cure for all patients with SCD.
AB - Peripheral blood stem cell transplantation (PBSCT) offers a curative option for sickle cell disease (SCD). Although HLA-matched sibling transplantation is promising, the vast majority of patients lack such a donor. We sought to develop a novel nonmyeloablative HLA-haploidentical PBSCT approach that could safely be used for patients with severe organ damage. Based on findings in our preclinical model, we developed a phase 1/2 trial using alemtuzumab, 400 cGy total body irradiation, and escalating doses of posttransplant cyclophosphamide (PT-Cy): 0 mg/kg in cohort 1, 50 mg/kg in cohort 2, and 100 mg/kg in cohort 3. A total of 21 patients with SCD and 2 with b-thalassemia received a transplant. The mean hematopoietic cell transplant–specific comorbidity index of 6 reflected patients with cirrhosis, heart failure, and end-stage renal disease. The engraftment rate improved from 1 (33%) of 3 in cohort 1 to 5 (63%) of 8 in cohort 2 and 10 (83%) of 12 in cohort 3. Percentage of donor myeloid and CD3 chimerism also improved with subsequent cohorts. There was no transplant-related mortality, and overall survival was 87%. At present, 0% in cohort 1, 25% in cohort 2, and 50% in cohort 3 remain free of their disease. There was no grade 2 to 4 acute or extensive chronic graft-versus-host disease (GVHD). Therefore, PT-Cy improves engraftment and successfully prevents severe GVHD after nonmyeloablative conditioning in patients with SCD who are at high risk for early mortality. Additional strategies are necessary to decrease the graft rejection rate and achieve a widely available cure for all patients with SCD.
UR - http://www.scopus.com/inward/record.url?scp=85032494569&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85032494569&partnerID=8YFLogxK
U2 - 10.1182/bloodadvances.2016002972
DO - 10.1182/bloodadvances.2016002972
M3 - Article
AN - SCOPUS:85032494569
VL - 1
SP - 652
EP - 661
JO - Blood advances
JF - Blood advances
SN - 2473-9529
IS - 11
ER -