Direct Intra-Bone Injection of Unrelated Cord Blood Cells Overcomes the Problem of Delayed Engraftment and Improves the Feasibility of Hematopoietic Transplant in Adult Patients.

Blood ◽  
2007 ◽  
Vol 110 (11) ◽  
pp. 334-334 ◽  
Author(s):  
Adalberto Ibatici ◽  
AnnaMaria Raiola ◽  
Marina Podesta ◽  
Francesca Gualandi ◽  
Nadia Sessarego ◽  
...  
Keyword(s):  
Stem Cells ◽  
T Cells ◽  
Cord Blood ◽  
Acute Gvhd ◽  
Chronic Gvhd ◽  
Conditioning Regimen ◽  
Significant Proportion ◽  
Hla Antigen ◽  
Hematopoietic Stem ◽  
Seeding Efficiency

Abstract Background. Cord blood transplants (CBT) are associated with delayed or failed engraftment in a significant proportion of patients (pts). Two of our previous observations suggested (i) that, in the animal model, direct intra-bone (i.b.) injection improves seeding efficiency and (ii) that the delayed engraftment was not related to an insufficient number of hematopoietic stem cells but rather to some difficulties to differentiate and maturate. Methods. Unrelated CB cells were selected for 29 consecutive pts (18 CB units were 4/6 HLA antigen matched, 10 were 5/6 and one 3/6 antigen matched). Median cell dose infused was 2.3 x10^7/kg (range 1.4 – 4.2). CB cells were concentrated in 4 syringes of 5 ml each and injected in the supero-posterior iliac crest (SPIC) under rapid general anesthesia (10 min. with propofol). Pts’ median age was 38 years (18–63); 25 had acute leukaemia (21 with refractory or relapsed disease and 4 high risk first remission leukemia); 2 chronic myeloid leukemia in advanced phase; 2 refractory Hodgkin’s disease. Most pts (n=24) were prepared with conventional conditioning regimen (TBI-cyclophosphamide). Results. The infusion of cells i.b. in SPIC (11 pts bilaterally; 18 pts monolaterally) was uneventful. Five pts are not evaluable because they died within 14 days from transplant. All pts surviving more than 14 days engrafted (100%). Median time for PMN (>0.5x10^9/l) and platelets (>20x10^9/l) engraftment was day +23 (14–40) and +38 (range 22–60) respectivelly. Four pts died of infection; one patient died of PTLD on day +140. Four patients relasped and 3 died of relapse. Fifteen out of 16 alive patients are in hematologic or molecular remission at a median follow up of 7.5 months (range 2–17). From day +30 full donor chimerism was documented in CD3, bone marrow cells and progenitor cells from both the injected and in non-injected SPIC; from day +30, CFC progenitors had already reached the lower values of the range of normal individuals in bilateral sites. These findings document the colonization of the hematopoietc system and the recovery of stem cell reservoir possibly due to an improvement of seeding efficiency. Only 3 pts (8%) experienced acute GvHD (2 grade II and 1 grade I); 4 pts. have moderate chronic GVHD. It is known that lymphocyte trafficking is one of the crucial factor in immunity. Two combined factors might contribute to the low incidence of acute GvHD: few of the transplanted T cells do not reach/circulate primarily in the lymphatic organs, where they would be immediately confronted with host antigen presenting cells as probably occurs after i.v. injection; injected T cells come immediately in contact with mesenchymal stem cells (MSC) and osteoblasts, known to be potent immunosuppressants. Conclusion. Direct intra-bone transplant of CB cells overcomes the problem of graft failure and is associated with reduced incidence of acute GvHD even when low numbers of HLA mismatched CB cells are transplanted. Nearly all patients searching for a CB unit were able to undergo CBT. This approach may change our policy of hemopoietic cell transplants.

The Use of Bone Marrow Graft for Hematopoietic Stem Cell Transplantation From Matched Unrelated Donors After Reduced Intensity Conditioning Regimen Improves Survival : Analysis of the Societe Française De Greffe De Moelle Et De Therapie Cellulaire.

Blood ◽  
2009 ◽  
Vol 114 (22) ◽  
pp. 873-873
Author(s):  
Andrea Toma ◽  
Marie-Lorraine Balère-Appert ◽  
Jean-Michel Boiron ◽  
Pierre Bordigoni ◽  
Gerard Socie ◽  
...  
Keyword(s):  
Stem Cells ◽  
Multivariate Analysis ◽  
Acute Gvhd ◽  
Chronic Gvhd ◽  
Conditioning Regimen ◽  
Reduced Intensity Conditioning ◽  
Hematopoietic Stem ◽  
Reduced Intensity Conditioning Regimen ◽  
Unrelated Donors ◽  
Grade Ii

Abstract Abstract 873 The use of peripheral blood stem cells (PBSC) for hematopoietic stem cell transplantation (HSCT) is associated with a higher risk of chronic graft versus host disease (GvHD) but its impact on survival is not clear since it may favor a greater graft versus leukemia (GvL) effect. However, in the context of HSCT from unrelated donors (UD), the balance between GvH and GvL may differ from the context of sibling donors and thus the use of PBSC may be deleterious. In this retrospective study, we analyzed 103 patients from the french registry who received a graft from an UD after a reduced intensity conditioning regimen (RIC) to evaluate the role of various parameters including the source of stem cells on the outcome. Seventy-one D/R pairs (69%) were 10/10 HLA match at the allelic level. Mismatches concerned 5, 6, 15, 2 and 7 D/R pairs for HLA-A, -B, -C, -DRB1 and -DQB1, respectively. The median age was 46 years (18-67). All patients had hematologic malignancies: AL (n=35), MM (n=18), CLL (n=5), NHL (n=11), HD (n=9), CML (n=12), MDS (n=9), and MPS (n=4). 39% of the patients were in an advanced phase of the disease at time of HSCT. The conditioning regimen was Fluda/TBI 2Gys for 26 patients, Bu/Fluda/ATG for 24 patients, Fluda/Melph for 16 patients and others for 37 patients. Overall, anti-thymocytes globulins (ATG) were part of the conditioning regimen for 77% of patients. The source of stem cells was PBSC for 65 patients and bone marrow (BM) for 38 patients. The median follow up of the cohort is 61,3 months (1,2-113,7). The results showed that 95% of patients engrafted. Five patients did not engraft (4 in the BM group and 1 in the PBSC group). Acute GvHD grade II to IV and grade III/IV occurred in 47% and 19% of patients, respectively. The risk of developing chronic GvHD was 49% at 2 years. Overall survival (OS) was 36% at five years. The median disease free survival (DFS) was 55 months among the 36 patients alive. We performed univariate and multivariate analysis of factors susceptible to impact on GvHD and survival. The multivariate analysis included the impact of HLA mismatch, disease status, diagnosis, source of stem cells, patient's and donor's ages. This multivariate analysis performed on the global population shows a trend towards an improved OS with the use of BM instead of PBSC. However, when focusing the multivariate analysis on the 71 patients transplanted with a 10/10 match donor, the most potent factor influencing the outcome is the use of BM which is associated with an improved OS (p=0.03) and DFS (p=0.02), less acute GvHD grade II-IV (p=0.05), or grade III/IV (p=0.05) and less chronic GvHD (p=0.05). These results suggest that the use of BM as the source of stem cells should be reconsidered in the context of matched UD after RIC transplantation. Disclosures: No relevant conflicts of interest to declare.

Reconstitution of Regulatory T Cell Subpopulations After Allogeneic Hematopoietic Stem Cell Transplantation and Graft-Versus-Host-Disease

Blood ◽  
2012 ◽  
Vol 120 (21) ◽  
pp. 1948-1948
Author(s):  
Alienor Xhaard ◽  
Helene Moins ◽  
Marc Busson ◽  
Maryvonnick Carmagnat ◽  
Marie Robin ◽  
...  
Keyword(s):  
Stem Cells ◽  
T Cells ◽  
T Cell ◽  
Malignant Disease ◽  
Acute Gvhd ◽  
Chronic Gvhd ◽  
Cd4 T Cell ◽  
Effector Memory ◽  
Hematopoietic Stem ◽  
Graft Versus Host

Abstract Abstract 1948 Previous studies on the reconstitution of regulatory T cells (Treg) after allogeneic hematopoietic stem cell transplantation (HSCT) have shown a delayed reconstitution in patients (pts) with acute graft-versus-host-disease (GvHD) (Magenau, 2010) and an association between impaired Treg reconstitution and the development of extensive chronic GvHD (Matsuoka, 2010). However, no studies have analyzed naive (nTreg) versus memory (mTreg) Treg reconstitution in a longitudinal cohort with large numbers of pts. From 2006 to 2009, 165 consecutive pts were prospectively analyzed in our center post-HSCT. Fresh whole blood samples were obtained 3 (n=155), 6 (n=162), 12 (n=165) and 24 (n=94) months after HSCT and analyzed by flow cytometry to quantify CD4 T cells, including naive, activated, central memory and effector memory subsets (Sallusto, 1999), as well as Treg (CD4+ CD25+ CD127neg/lo), including nTreg (CD45RA+) and mTreg (CD45RAneg). The results are presented as median values of circulating cells. Median age was 41 years (range: 6–68). The indication for HSCT was malignant disease in 92%. The conditioning regimen was reduced-intensity (RIC) in 51%. The donor was an HLA-identical sibling in 56%. The source of stem cells was peripheral blood (PBSC), bone marrow (BM) and cord blood (CB) in 65%, 28% and 7%, respectively. All pts received cyclosporine as GvHD prophylaxis. GvHD was defined as acute if occurring before day 100 and chronic thereafter. Total Treg (tTreg) increased from 13/μL at 3 months to 44/μL at 24 months, but always remained inferior to healthy controls (HC) (66/μL). nTreg increased from 1.8/μL at 3 months to 4.8/μL at 24 months (HC: 24/μL). mTreg increased from 10.7/μL at 3 months to 33.3/μL at 24 months (HC: 42/μL). The CD4/Treg ratio remained stable at 12.6 at 3 months and 11.6 at 24 months while the nCD4/nTreg ratio increased from 17.4 at 3 months to 42.7 at 24 months, showing a larger expansion of naive cells in the CD4 T cell compartment than in the Treg compartment (Figure 1) and a larger expansion of memory cells in the Treg than within the CD4 cells. At 3 months post-HSCT, tTreg, nTreg and mTreg were significantly higher in PBSC recipients (18.4, 2.7 and 14.5/μL) than in BM (8.1, 0.9 and 6.5/μL) and CB recipients (6.5, 0.6 and 5.3/μL) (p=0.0001), respectively. Pts transplanted after a RIC regimen had significantly more tTreg and mTreg than pts transplanted after a standard regimen (17 and 14/μL, compared with 9.8 and 8/μL, p=0.004 and 0.008 respectively). Pts transplanted for an aplastic anemia had significantly fewer nTreg than pts transplanted for a malignant disease (0.4 and 1.9/μL, p=0.001). At 6 months post-HSCT, tTreg, nTreg and mTreg were significantly higher (p=≤0.01) in pts transplanted from an HLA-identical sibling (19.5, 1.9 and 17.2/μL) compared with pts transplanted from an unrelated donor (13.2, 1.2 and 11/μL). At 12 and 24 months post-HSCT, younger pts (≤15 years) had significantly more nTreg than older pts (9.8 and 28.7/μL compared with 2.1 and 4.2, p=0.001). In pts with previous acute GvHD, tTreg and mTreg were significantly lower at 3 (8.5 and 7.7/μL) and 6 months (14.6 and 12.5/μL) compared with pts without (15.6 and 13.8/μL at 3 months, p=0.005 and 21.3 and 18.2/μL at 6 months, p≤0.007), respectively. Absolute numbers of tTreg, nTreg and mTreg, and the frequencies of Treg relative to activated, effector memory and central memory CD4 T cells at 3, 6 and 12 months post-HSCT did not predict the occurrence of a later episode of chronic GvHD up to 2 years post-HSCT. In our population, total, naive and memory Treg reconstitution was delayed post-HSCT and remained below the normal range up to 2 years after HSCT. tTreg reconstitution post-HSCT was mostly due to mTreg expansion. RIC regimen and PBSC as source of stem cells were associated with a better short-term reconstitution. At 6 months, pts transplanted from siblings had a better reconstitution while nTreg long-term reconstitution was mainly influenced by recipient age (better if ≤15 years). While previous acute GvHD impaired Treg reconstitution, Treg subsets (absolute numbers and frequencies relative to CD4 T cell subsets) at 3, 6 and 12 months post-HSCT were unable to predict chronic GvHD in this large cohort of patients. We believe these data are of particular interest regarding the recently increasing number of Treg interventional studies in humans in the context of HSCT. Disclosures: No relevant conflicts of interest to declare.

Outcomes of 40 Adult Patients after Double Cord Blood Transplantation Using a Reduced Intensity Chemotherapy Conditioning Regimen.

Blood ◽  
2006 ◽  
Vol 108 (11) ◽  
pp. 605-605
Author(s):  
Karen K. Ballen ◽  
Corey Cutler ◽  
Thomas R. Spitzer ◽  
Beow Yeap ◽  
Steve McAfee ◽  
...  
Keyword(s):  
Cord Blood ◽  
Total Dose ◽  
Aplastic Anemia ◽  
Acute Gvhd ◽  
Chronic Gvhd ◽  
Conditioning Regimen ◽  
Cord Blood Unit ◽  
Reduced Intensity ◽  
Related Mortality

Abstract Umbilical cord blood is an alternative stem cell source for patients without matched related or unrelated donors. However, single cord blood unit transplantation in adults is associated with high transplant related mortality, mostly due to infection. In this study, we used a reduced intensity conditioning regimen followed by infusion of two partially matched cord blood units. The conditioning regimen was fludarabine 30mg/m2/day Days -8,-7,-6,-5,-4,-3 (total dose 180mg/m2), melphalan 100mg/m2/day Day -2, and rabbit antithymocyte globulin (thymoglobulin) 1.5 mg/kg/day Days -7,-5,-3,-1 (total dose 6.0 mg/kg). Cord blood units were a 4/6 or better HLA A, B, DR match with each other and with the patient, and contained a minimum combined pre-freeze cell dose of 3.7 x 107NC/kg. GVHD prophylaxis was cyclosporine and mycophenolate mofetil, for the first 21 patients, and tacrolimus and sirolimus for the second cohort of 19 patients. Forty patients, 22 males (55%) and 18 females (45%) with a median age of 48 years (range 19–64 years) were treated. The diagnoses were AML (n=14), ALL (n=1), NHL (n=10), CLL (n=2), MDS (n=5), Hodgkins Disease (n=5), aplastic anemia (n=2), and chronic myelogeneous leukemia (n=1). Thirty-five patients have greater than 100 days of follow-up and are included in this analysis. The cell doses infused were a median of 4.0 x 10 7NC/kg (range 3.0–6.7 x 107) and 1.9 x 10 5 CD34+ cells/kg (range 0.5–10.0 x 105). Two patients (both with MDS complicating aplastic anemia) experienced primary graft failure, and received second cord blood transplants using a different conditioning regimen. Among the remaining patients, the median time to an absolute neutrophil count >500 was 21 days (range 14–70 days). There were two late graft failures. The median time to a platelet count >20,000 unsupported was 43 days (range 21–125 days). The incidence of acute GVHD Grades II–IV was 40% for the patients receiving cyclosporine/MMF and 29% for patients receiving tacrolimus and sirolimus. There were no deaths from acute GVHD in the cyclosporine/MMF group and one death from acute GVHD in the tacrolimus/sirolimus group. Seven patients (20%) developed chronic GVHD. The 100-day transplant related mortality was 14%. Two deaths were related to Epstein Barr virus related lymphoproliferative disorder, and the other deaths were due to a CNS bleed, staphylococcal sepsis, and respiratory failure due to aspergillus infection. Two patients have relapsed and one has progressive disease. With a median follow up of 14 months (range 3–31 months) the overall survival is 74% and the disease-free survival is 67%. Chimerism analysis showed predominance of one cord by Day +100. In 71% of patients, the first cord blood unit infused predominated. In conclusion, engraftment of adult patients appears to be acceptable using double cord blood products and reduced intensity, non TBI conditioning regimen; the risk of serious acute and chronic GVHD is low, survival is excellent in a selected group of patients and relapse rate is low, suggesting preservation of graft versus leukemia effect despite the low T cell dose.

The Feature of Distribution and Clonality of TCR Vα and Vβ Repertoire in Cord Blood.

Blood ◽  
2006 ◽  
Vol 108 (11) ◽  
pp. 5132-5132
Author(s):  
Shaohua Chen ◽  
Yangqiu Li ◽  
Lijian Yang ◽  
Dongzhi Cen ◽  
Si Chen ◽  
...  
Keyword(s):  
Stem Cells ◽  
T Cells ◽  
Cord Blood ◽  
Peripheral Blood ◽  
Healthy Adult ◽  
Cell Receptor ◽  
Hematopoietic Stem ◽  
Normal Peripheral Blood ◽  
Pcr Products ◽  
Adult Volunteers

Abstract Analysis of T cell receptor (TCR) Vα and Vβ repertoire is one of the sensitive methods to understand the distribution and clonality of T cells from different samples, which is used to identify clonal expansion T cells that response to tumor associated antigens. Cord blood has been used successfully as a source of hematopoietic stem cells for transplantation. Recently, stem cells transplantation was demonstrated more important as immunotherapy against malignance cells. And cord blood T cells are resourceful for production the specific CTL to use in leukemia immunotherapy. But the feature of distribution and clonality of TCR Vα and Vβ subfamily T cells in cord blood is not yet clearly defined. In the present study, the CDR3 of 29 TCR Vα and 24 Vβ subfamily genes were analyzed in T cells from 10 cases of cord blood, which obtained at delivery from full-term healthy pregnancies, using RT-PCR and genescan technique. Peripheral blood of nine cases healthy adult volunteers served as controls. The results showed that 15–19 of 29 Vα and 9–15 of Vβ subfamily T cells could be identified in the most cases, whereas only 2–4 of Vα subfamilies expressed was found in 3 cases. The most frequently expressed Vα subfamilies were Vα 3 and Vα 10 (100%), Vα 4, 5, 6, 8, 12, 15, 17 and Vα 21 (70%), Vα1, 13, 25, and Vα26 (60%), with a lower expression rate found in Vα16, 24 and Vα 28 (10%). Vα 9 and Vα 29 were not detected in both CB and healthy adults. In analysis of TCR Vβ repertoire, Vβ3, 5, 8 and Vβ9 genes could be identified in all samples, Vβ7 and Vβ13 could be found in 90% of samples, whereas Vβ4, 6, 11, 12, 18, 23 and Vβ24 were absent in all samples, which could be detected in normal peripheral blood samples. Genescan analysis showed that all PCR products of TCR Vα and Vβ subfamilies from cord blood displayed a Gaussian distribution of CDR3 lengths (multi-peaks), which are corresponding to polyclonal rearrangement pattern, except for tow cases, which displayed oligoclonal peak in Vα 24 or Vα28 respectively. In contrast, some Vα subfamily products from 8 of 9 cases of healthy adult volunteers contained at least an oligoclonal peak in different Vα subfamilies respectively, however, multi-peaks were found in all PCR products of TCR Vβ from normal peripheral blood. In conclusion, more than 20% of TCR Vα or Vβ subfamily T cells were absent in cord blood. The majority of TCR Vα and Vβ subfamily T cells in cord blood displayed polyclonality. Occasional oligoclonal peaks are identified in some cases.

Killer Immunoglobulin-Like Receptor and NOD2/CARD15 Polymorphisms Independently Influence Survival after Allogeneic Hematopoietic Stem Cell Transplanation.

Blood ◽  
2007 ◽  
Vol 110 (11) ◽  
pp. 2167-2167
Author(s):  
Sebastian Giebel ◽  
Aleksandra Holowecka-Goral ◽  
Izabela Nowak ◽  
Tomasz Czerw ◽  
Jerzy Wojnar ◽  
...  
Keyword(s):  
T Cells ◽  
Stem Cell ◽  
Acute Gvhd ◽  
Chronic Gvhd ◽  
Hematopoietic Stem ◽  
Kir Genes ◽  
Increased Risk ◽  
Grade Ii ◽  
Card15 Gene ◽  
Grade Iii

Abstract Background: Activating and inhibitory killer immunoglobulin-like receptors (KIRs) regulate function of NK cells and a subset of T cells. KIR genotype, in particular the content of activating KIR genes is highly polymorphic. NOD2/CARD15 protein is broadly expressed in APCs and lymphocytes. Single nucleotide polymorphisms (SNPs) of this gene have been reported to impair the pathogen elimination and trigger pathologic immunologic reactions like GvHD. The goal of this prospective study was to evaluate the impact of donor’s and recipient’s KIR and NOD2/CARD15 genotypes on outcome after allogeneic hematopoietic stem cell transplantation (alloHSCT). Pateints and methods: One-hundred-two consecutive patients with hematological malignancies, aged 32(18–58)y, treated with alloHSCT from HLA-matched related (n=34) or matched unrelated donor (MUD) (n=68) were included. The conditioning regimen was myeloablative, GVHD prophylaxis consisted of CsA, Mtx, and, in case of MUD-HSCT, pre-transplant ATG. Donors and recipients were tested for 11 KIR genes as well as SNP8,12,13 of the NOD2/CARD15 gene. In addition, immune reconstitution including KIR expression on T cells, was analyzed on days +28, +56, +100, +180, and +360. Results: Overall survival (OS) rate at 2y was significantly lower in alloHSCT with at least one activating KIR mismatch compared to transplants with full compatibility (62% vs. 86%, p=0.01). In particular, the presence of at least one activating KIR in the donor with its absence in the recipient (D+R−) was associated with decreased probability of OS (60% vs. 78%, p=0.01) and DFS (58% vs. 82%, p=0.005), as well as increased incidence of non-relapse mortality (NRM) (27% vs. 7%). KIR2DS1 and KIR3DS1 D+R− mismatches resulted in increased risk of grade II–IV acute GvHD, whereas KIR2DS3 and KIR2DS2 D+R− mismatches were associated with increased risk of chronic GvHD. The presence of at least one activating KIR D+R− mismatch was associated with increased CD8+/CD4+ T cell ratio up to day +100. In all cases of incompatibility regarding KIR2DS1, KIR2DS2 and KIR3DS1, T cells with expression of respective receptors could be detected up to 360 days after alloHSCT. The presence of SNP8 of the NOD2/CARD15 gene in the recipient was associated with decreased probability of OS (20% vs. 70%, p=0.005) and DFS (20% vs. 70%, p=0.01) as well as increased incidence of NRM (60% vs. 17%) and grade III–IV acute GvHD (67% vs. 8%). In a multivariate analysis including KIR and NOD2/CARD15 polymorphisms together with other potential risk factors, increasing number of D+R− activating KIR mismatches as a linear variable appeared to independently influence OS (HR: 1.3, p=0.02), DFS (HR: 1.3, p=0.008), NRM (HR: 1.4, p=0.02), grade II–IV acute GvHD (HR: 1.4, p=0.001), and chronic GvHD (HR: 1.2; p=0.02). Recipient SNP8 of NOD2/CARD15 was predictive for OS (HR: 5.5, p=0.003), DFS (HR: 4.4, p=0.008), NRM (HR: 5.9, p=0.006), grade III–IV acute GvHD (HR: 6.1, p=0.02), and chronic GvHD (HR: 3.7; p=0.03). Conclusions: Both activating KIR D+R− mismatches and recipient SNP8 of NOD2/CARD15 appear to enhance alloreactivity and independently influence survival after alloHSCT. Evaluation of these polymorphisms may contribute to better donor selection and optimization of the alloHCT procedure.

FluBup-ATG-TBI for High-Risk or Advanced Adult ALL in Remission: A Retrospective Review of a Mature Cohort.

Blood ◽  
2009 ◽  
Vol 114 (22) ◽  
pp. 3384-3384
Author(s):  
Andrew Daly ◽  
Douglas A. Stewart ◽  
Ahsan Chaudhry ◽  
Nizar J Bahlis ◽  
Christopher Brown ◽  
...  
Keyword(s):  
Stem Cells ◽  
High Risk ◽  
Lymphoblastic Leukemia ◽  
Chronic Gvhd ◽  
Conditioning Regimen ◽  
Advisory Board ◽  
Hematopoietic Stem ◽  
Blood Stem Cells ◽  
Multi Center Study ◽  
Relapsed Disease

Abstract Abstract 3384 Poster Board III-272 Purpose: Hematopoietic stem cell transplantation (HSCT) is routinely offered to suitable candidates with high-risk or advanced acute lymphoblastic leukemia. In this report we describe our experience with a novel conditioning regimen, previously reported to confer low TRM and high OS in AML, in this population. Patients and Methods: Between 05/2000 and 06/2008 44 patients with high-risk (either adverse cytogenetics, age > 35 or high WBC at diagnosis) or advanced (>CR1) ALL received HSCT after myeloablative conditioning using Fludarabine 50 mg/m2 days -6 to -2, Busulfan 3.2 mg/kg days -5 to -2, and TBI 2 Gy x 2 doses. GVHD prophylaxis was with rabbit ATG 0.5 mg/kg day -2, then 2 mg/kg days -1 and 0, CyA (tapered on day +56) and short-course methotrexate. All patients were in remission at the time of transplant. Imatinib mesylate (Gleevec) was not used routinely before or after transplant for patients with BCR-Abl+ ALL. Median (range) follow-up of surviving patients is 4.3 (1.0 – 9.0) years. All patients were followed for at least 1 year after BCT. Results: The cohort consists of 32 patients with high-risk (median age 40 (19-64) years) and 12 patients with advanced (median age 25 (19-65) years) disease who received bone marrow (n=5), G-CSF mobilized blood stem cells (n=38) or umbilical cord blood stem cells (n=1) from 25 related (21 fully-matched) or 19 unrelated (16 fully-matched) donors. Median times to neutrophil and platelet engraftment were 14 (11-28) days and 18 (9-105) days, respectively. Five patients did not require platelet transfusion. Cumulative incidences of grade II-IV and grade III-IV acute GVHD were 53.2% (95% CI 36.3%-67.5%) and 20.6% (95% CI 3.5%-47.6%), respectively. Chronic GVHD complicated 55% (95% CI 38.4%-68.8%) of transplants. Six patients (13.6%) died in remission before day +100. Event-free and overall survivals at 5 years were 56.7% (95% CI 39.1%-71.0%) and 66.0% (95% CI 48.8%-78.6%), respectively. Nine patients (20%) died in remission, 6 (14%) died after relapse and two patients remain alive following second transplants for relapsed disease. Five of 11 patients age > 50, 8/12 patients with advanced disease and 13/23 patients with adverse-risk cytogenetics remain alive. Conclusion: We found encouraging results with FluBup-ATG-TBI in a cohort of patients with advanced or high-risk ALL. These results warrant comparison with other conditioning regimens in a randomized, multi-center study. Disclosures: Daly: Hoffmann-Laroche: Advisory Board, Honoraria. Stewart:Hoffmann La Roche: Advisory Board, Honoraria, Research Funding.

Long-Term Outcome After Matched Allogeneic Hematopoietic Stem Cell Transplantation for Fanconi Anemia On Behalf of the FA Committee of the Severe Aplastic Anemia Working Party (SAA WP) and the Pediatric Working Party of the European Group for Blood and Marrow Transplantation (EBMT)

Blood ◽  
2011 ◽  
Vol 118 (21) ◽  
pp. 325-325
Author(s):  
Régis Peffault de Latour ◽  
Raphael Porcher ◽  
Jean-Hugues Dalle ◽  
Mahmoud Aljurf ◽  
Elisabeth T Korthof ◽  
...  
Keyword(s):  
Risk Factors ◽  
Stem Cells ◽  
Bone Marrow ◽  
Clonal Evolution ◽  
Chronic Gvhd ◽  
Conditioning Regimen ◽  
Working Party ◽  
Secondary Malignancies ◽  
Hematopoietic Stem

Abstract Abstract 325 Background: Fanconi anemia (FA) is a rare, genetically and phenotypically heterogeneous inherited disorder. The natural history of FA is characterized by progressive bone marrow failure (BMF) and an increased risk for development of malignancies. Allogeneic Hematopoietic Stem Cell Transplantation (HSCT) is considered the treatment of choice for FA patients with BMF or clonal evolution (acute myeloid leukemia or MDS). Most deaths related to HSCT occur within the first year after HSCT. Risk factors for the development of malignancies after HSCT are still incompletely defined in patients with FA. Our objectives were to evaluate risk factors for late mortality and secondary malignancies in 1-year survivors in the largest cohort of FA patients post-HSCT ever studied, so far. Patients and methods: Patients with FA reported to the European Blood and Marrow Transplant (EBMT) Group alive 1 year after a matched allogeneic HSCT were reviewed. Donor and recipient were matched if HLA A and B were identical at the generic level and HLA DRB1 at the allelic level. Cord blood as source of stem cells was excluded because of a few number of FA patients with very long-term follow-up (FU). Data was analyzed using proportional hazards and proportional cause-specific hazards models. Results: Between May 1972 and January 2009, 789 patients with FA who underwent first SCT were reported to the EBMT registry. 509 patients were alive 1 year post-HSCT and were included in the present study. 273 patients were male. Median age at HSCT was 9 years (range, 10 months to 44 years). The majority (77%) of patients had received stem cells from a related donor and bone marrow (80%) was the main source of stem cells. Irradiation was used as part of the conditioning regimen in 27% of the cohort, while fludarabine-based regimen was used in 29%. T-cell depletion (ex vivo and in vivo) was used in 41%. In January 2010, 15% (n=74) of the patients had died. Median age at death was 19 years. With a median FU of 6 years (1 to 28 years), the probability for survival after HSCT was 49% at 20 years (95%CI 38–65). The main causes of death were secondary malignancies in 52% of cases and treatment related mortality in 21%. Solid tumor represented 89% of the secondary malignancies. Cumulative incidence of death and secondary cancer are presented in Figure 1. A worse survival was observed in patients transplanted before year 2000 (Hazard ratio - HR: 2.24; 95%CI 1.06–4.71; p=0.034), in those transplanted because of clonal evolution (acute myeloid leukemia or MDS) (HR: 3.88; 95%CI 2.03–7.41; p<0.0001), in patients older than 10 years at SCT (HR: 2.00; 95%CI 1.26–3.18; p<0.004), and in patients transplanted more than a year after FA diagnosis (HR: 1.98; 95%CI 1.10–3.54; p=0.02). Without taking into account transplant period, HSCT after the age of 10 (HR 1.88 [1.17 to 3.03], P=0.009), clonal evolution before HSCT (HR 3.31 [1.72 to 6.39], P=0.0004) and previous chronic GVHD (HR 2.72 [1.65 to 4.46], P<0.0001) were associated with decreased survival. After adjustment for these factors, patients transplanted before 2000 still showed a worse survival (HR 2.09 [0.99 to 4.41], P=0.052). Using occurrence of a secondary malignancy as a time-dependent covariate, the hazard of death after this event was extremely high (HR 17.3 [9.70 to 30.7], P<0.0001). Independent risk factors for secondary malignancies included HSCT after the age of 10 (HR 2.89 [1.53 to 5.45], P=0.001), peripheral blood as source of stem cells (HR 3.06 [1.18 to 5.45], P=0.001) and previous chronic GVHD (HR 2.89 [1.53 to 5.45], P=0.001). Irradiation in the conditioning regimen and donor type (related versus unrelated) did not correlate with outcomes (both late survival and secondary malignancies). Conclusion: We found improved outcomes for patients with FA post-HSCT in recent years (>2000). However, long-term survival in FA patients after HSCT is still mainly affected by secondary malignancies (89% of solid tumors). Patients should be transplanted before the age of 10 with bone marrow as source of stem cells to try to avoid this complication. Moreover, chronic GvHD still emerges as a major cause for both secondary malignancies and mortality. Clearly improved method for prevention, early diagnosis and treatment of this complication are urgently needed. This study also highlights the need for very long-term FU for FA patients after HSCT. Disclosures: Peffault de Latour: Alexion: Consultancy, Research Funding.

Complete Donor T-Cell Chimerism Predicts Lower Relapse Incidence after Standard Double Umbilical Cord Blood Reduced Intensity Conditioning Regimen Allogeneic Transplantation in Adults

Blood ◽  
2014 ◽  
Vol 124 (21) ◽  
pp. 2479-2479
Author(s):  
Pierre Peterlin ◽  
Jacques Delaunay ◽  
Thierry Guillaume ◽  
Thomas Gastinne ◽  
Beatrice Mahe ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Cord Blood ◽  
Acute Gvhd ◽  
Chronic Gvhd ◽  
Conditioning Regimen ◽  
Allogeneic Transplantation ◽  
Reduced Intensity Conditioning Regimen ◽  
Before And After ◽  
The Impact

Abstract Double umbilical cord blood (dUCB) allogeneic transplantation following low dose TBI, cyclophosphamide and Fludarabine (TCF regimen)-based reduced-intensity conditioning regimen (RIC) is increasingly used in adults lacking a suitable related or unrelated donor. Currently, there is little data regarding the impact on long-term outcome of CD3+ T cell chimerism (TCC) in this particular setting. Thirty-six adults with various hematological diseases and who receieved dUCB conditioned with TCF were included in this retrospective study. Peripheral blood CD3+ TCC was considered until day +100 post-tranplant in order to determine the impact of full versus mixed chimerism on long-term outcomes. Twenty-nine and 7 patients were documented with full and mixed CD3+ TCC, respectively, within the first 100 days post-transplant. With a median follow-up of 36 months, 3 year-OS, DFS, and relapse incidence were 61%, (95% CI 43-75); 50% (95% CI 32.5-66) and 28% (95% CI 16-44), respectively. In univariate analysis, a full CD3+ TCC was associated with a better 3-year DFS : 59% (95% CI 39-75.5) versus 14% (95% CI 7-46), (HR=0.24 [0.09-0.65], p=0.005) and a lower cumulative incidence of relapse : 24% (95% CI 21.5-57) versus 78% (95% CI 52-99), (HR=0.18 [0.05-0.5], p=0.004). In multivariate analysis, a full CD3+ TCC remained associated with a lower incidence or relapse (HR=0.17, 95% CI 0.028-0.99, p=0.049). CD3+ TCC has no impact on GVHD and NRM in this study. In conclusion, in our study, full CD3+ TCC was independently associated with a lower risk of relapse after dUCB TCF RIC allogeneic transplant in adults, highlighting the need to develop immunotherapy approaches allowing for early conversion to full chimerism after dUCB. Abstract 2479. Table 1 Patients, sustained cord blood and transplantation characteristics. Patients, sustained cord blood and transplantation characteristics Full TCC (n=29) Mixed TCC (n=7) p No.of patients % No.of patients % Patients characteristic Age at transplant, years, median (range) 57 (22-69) 47 (17-64) NS Sex female 14 48 3 43 NS Hematological malignancy : Lymphoid / myeloid 14 / 15 48 / 52 3 / 4 43 / 57 NS Statut at transplant : RC / RP 23 / 6 79 / 21 6 / 1 86 / 14 NS Time to transplant, days, median (range) 395 (137-5645) 216 (92-604) NS Cord blood characteristics Age of cord blood, months, median (range) 31 (9-165) 116 (23-140) NS Matching cordon with patient NS 4/6 10 35 3 43 5/6 19 65 3 43 6/6 0 0 1 14 Number of total nucleated cell 10^8/kg before and after thawing, respectively, median (range) 0,28 (0,16-0,455) ; 0,248 (0,157-0,406) 0,222 (0,135-0,492) ; 0,22 (0,11-0,392) NS Number of CD34+ cell 10^6/kg before and after thawing, respectively, median (range) 0,066 (0,022-0,215) ; 0,043 (0,02-0,2) 0,078 (0,031-0,427) ; 0,041 (0,019-0,259) NS Mismatch between cord blood and patient Sex 14 48 3 43 NS Serology CMV 13 45 3 43 NS ABO 16 55 2 28 NS Rhesus 22 76 6 86 NS Graft Neutrophil count recovery >0.5 G/L, days, median (range) 17 (6-32) 11 (7-20) NS Platellet recovery >20G/L, days, median (range) 41 (0-164) 31 (0-67) NS Acute GVHD (grade II-IV / grade III-IV) 19 (12 / 6) 65 (41 / 21) 4 (3 / 1) 57 (43 / 14) NS Chronic GVHD (Limited / Extensive) 11 (8 / 3) 38 (28 / 10) 3 (2 / 1) 43 (28 / 14) NS Chimerism Rate, %, median (range) 100 (96-100) 82 (14-94) <0,001 Table 2 Multivariate analysis for DFS, OS and CIR. Multivariate analysis Hazard Ratio 95% CI P values DFS Age (continuos variable) 0.97 0.93 to 1.01 0.174 Sex 0.37 0.10 to 1.26 0.111 TCC full versus mixed 0.28 0.074 to 1.04 0.058 Chronic GVHD : noversus yes 4.68 1.12 to 19.53 0.034 OS Age (continuous variable) 0.95 0.91 to 0.99 0.022 myeloid vs lymphoid 9.13 1.7 to 49.05 0.010 Acute GVHD : none vs grade 3-4 0.24 0.06 to 0.93 0.038 TCC full versus mixed 0.62 0.15 to 2.46 0.495 CIR Age (continuos variable) 0.95 0.91 to 1.00 0.057 Sex 0.88 0.15 to 5.26 0.892 TCC full versus mixed 0.17 0.028 to .99 0.049 Chronic GVHD : no versus yes 8.19 0.46 to 146.41 0.153 Disclosures No relevant conflicts of interest to declare.

Complementary Transplantation with Haploidentical Stem Cells and Unrelated Cord Blood for Leukemia and Thalassemia

Blood ◽  
2016 ◽  
Vol 128 (22) ◽  
pp. 1235-1235
Author(s):  
Chunfu Li ◽  
Yuelin He ◽  
Xuedong Wu ◽  
Xiaoqin Feng ◽  
Jianyun Liao ◽  
...  
Keyword(s):  
Stem Cells ◽  
Cord Blood ◽  
Acute Gvhd ◽  
Chronic Gvhd ◽  
Mixed Chimerism ◽  
Gvhd Prophylaxis ◽  
Grade Ii ◽  
Unrelated Cord Blood ◽  
Kinetics Of

Abstract Background Unrelated Cord Blood (UCB) Transplantation is a potentially curative therapy for leukemia and thalassemia; however, engraftment failure and slow immune reconstitution remain key clinical issues. We hypothesized that complementary transplantation (CT) of UCB with haploidentical stem cell graft (hap-SC) tolerized with post-transplant cyclophosphamide would result in rapid engraftment and low relapse rate without additional risk of graft-versus-host disease (GVHD). Therefore, we developed a novel complementary transplant approach. Patients and Method Sixty-six patients received CT between December 2012 and June 2016. Of them, 30 patients had malignance diseases (MD), including 11 lymphoid and 19 myeloid diseases, and 36 had thalassemia major (TM). Median age was 12 (range; 2-13) and 8 (3-17) years in the MD and TM group, respectively. Median follow-up time was 13 (7-32) and 19 (2-25) months, respectively. Conditioning (Regimen CT-13) included Cyclophosphamide on day-8 to -7, Busulfan on day-6 to -4, Fludarabine on day-6 to -2 and Thiotepa on day-3. Hap-SC was infused on day 0. GVHD prophylaxis consisted of Cyclophosphamide on day+3 to +4. UCB was infused on Day+6. Mycophenolate mofetil and Tacrolimuswas started on day+6 for GVHD prophylaxis. For 26 TM patients transplanted since 2014, they received identical regimen except with the additional Thymoglobulin on day -11 to -9 (Regimen CT-14). Results The chimerism status at last follow-up was Hap-SC, UCB, mixed stem cells (MSC) and rejection in 20, 9, 1 and 0 patient in the MD group; and 16, 14, 3 and 3 patients in the TM group. Interesting, the initial chimerism on day+28 in the TM group was Hap-SC, UCB and MSC engrafted in 15, 7 and 12 patients, respectively. Thus, the MSC was not stable in TM patients; UCB typically became dominant overtime instead of the initial majority from hap-SC (Fig. 1). In the MD group, the time to neutrophil >= 0.5x109/L, platelet >=20 x109/L and hemoglobin >=80 g/L was day+18 (14-36), +10.0 (6-51) and +7 (1-20) in the final hap-SC engrafted group; and+30 (22-35), +25 (1-64) and +7 (3-28) in the final UCB engrafted group. Overall survive (OS), disease-free survive (DFS), relapse incidence (RI) and non-relapse mortality (NRM) were 75.6%, 64.3%, 24.7£¥ and 13.7%, respectively, in all 30 MD patients; and 79.3%,73.8%,15.5% and 12.3% (Fig.2), respectively, in the 25 cases with complete remission (CR) at the time of transplantation. The corresponding data were 89% vs. 88.9%£¬65.0% vs. 77.8%£¬31.1 % vs.12.5% and 10.3% vs.11.1%£¨p>0.05 in all pairs), respectively, in hap-SC and UCB engrafted groups. Donor carrying KIR centromeric B motif was associated with reduced RI (10 % vs. 33.9%). In TM group, OS, thalassemia free survive (TFS), rejection and transplant-related mortality were 91.2%, 85.7%, 5.6% and 8.8%, respectively in all 36 patients. Impressively, all of the 26 patients who received the newer CT-14 protocol were alive without TM (Fig. 2). 7/10 UCB carrying KIR centromeric B motif engrafted. In the MD group, 23.3% had grade II-IV and10.0% had III-IV acute GVHD. Grade II, III and IV acute GVHD occurred in 3 patients, respectively, in TM group. One MD patient had severe chronic GVHD (lung) after DLI for relapse. No moderate chronic GVHD occurred in TM groups. Summary The CT-13 regimen resulted in high OS and DFS, especially in CR patients in the MD group. The CT-14 leaded to 100% TFS in thalassemia patients. Acute and chronic GVHD were acceptable. Donor carrying centromeric B motif promoted engraftment and reduced RI. A multicenter study should be developed in the future based on our favorable results. Figure 1. Kinetics of mixed chimerism in thalassemia patients Figure 1. Kinetics of mixed chimerism in thalassemia patients Figure 2. Results of malignance diseases in CR status at the time of transplant Figure 2. Results of malignance diseases in CR status at the time of transplant Figure 3. Thalassemia-free survive resulted from regimen CT-14 Figure 3. Thalassemia-free survive resulted from regimen CT-14 Disclosures No relevant conflicts of interest to declare.

scholarly journals Complementary Transplantation with Haploidentical Stem Cells and Unrelated Cord Blood in Thalassemia Major

Blood ◽  
2016 ◽  
Vol 128 (22) ◽  
pp. 848-848 ◽  
Author(s):  
Chunfu Li ◽  
Yuelin He ◽  
Xuedong Wu ◽  
Xiaoqin Feng ◽  
Jianyun Liao ◽  
...  
Keyword(s):  
Stem Cells ◽  
T Cells ◽  
Cord Blood ◽  
Chronic Gvhd ◽  
Thalassemia Major ◽  
Hla Typing ◽  
Mixed Chimerism ◽  
Unrelated Cord Blood ◽  
Kinetics Of

Abstract Background Effects of haploidentical stem cells (Hap-SC) and unrelated cord blood (UCB) transplant are unsatisfactory in thalassemia major (TM) so far. High rejection and low TM-free survive (TFS) were key clinical issues. Increased rejection often offset the effort of lowered GVHD. The effect of alloreactive clone destruction in post-transplant cyclophosphamide (Cy, PTCy) transplant resulted in low GVHD and high relapse but nice immuno-recovery and immuno-tolerance by keeping antivirus and regulatory T cells. These may just complement the congenital insufficiency, delay engraftment and slow immuno-recovery, of UCB transplantation. Conversely, graft vs. leukemia effect and controllable GVHD from naive T cells of UCB offset the lack above of hap-SC transplant with PTCy. Therefore, we developed a novel complementary transplant with Hap-SC and UCB (CT-hap-CB) for leukemia and TM patients. Patients and method Thirty-six TM patients received CT-hap-CB between December 2013 and June 2016. Median age was 8 (range, 3-24) years old. Median follow-up time was 19 (2-25) months. Conditioning (Regimen, CT-13) included Cy on day-8 to -7, Busulfan on day-6 to -4, Fludarabine on day-6 to -2 and Thiotepa on day-3. GVHD prophylaxis consisted of Cy on day+3 to +4, Mycophenolate mofetil and Tacrolimus from day+6. Noteworthily, UCB was infused on day+6. The latter 26 TM patients received additionally Thymoglobuline on day -11 to -9 (Regimen, CT-14). Results Preponderance engraftment of hap-SC, UCB, mixed stem cells (MSC) and rejection in16, 14, 3 and 3 patients, respectively, at the last follow-up. Initial (day+28) full hap-SC, UCB and MSC chimerism occurred in 15, 7 and 12 patients. Cells derived from UCB overtime were dominant instead of initial majority from hap-SC (Fig. 1) in MSC group. 7/10 UBS with centromeric B motif engrafted. Median times to neutrophil ≥ 0.5x109/L, platelet ≥ 20 x109/L and hemoglobin ≥ 80 g/L were day+20.0 (range; 14-47), 11.0 (9-162) and 11 (1-39); 47.0 (34-113), 66.0 (12-227) and 46.0 (13-63); and 24 (1-46), 14 (11-116) and 8 (4-91), respectively, in initial hap-SC (n, 15), UCB (n, 7) and MSC (n, 12) groups. Overall survive, thalassemia free survive (TFS), rejection and mortality related transplant were 91.2%, 85.7%, 5.6% and 8.8%, respectively. Impressively, all of the 26 patients who received CT-14 protocol were alive without TM (Fig. 2). Grade II, III and IV acute GVHD occurred in 3 patients, respectively. One patient died of grade IV GVHD and another died of infection when the parents abandoned therapy after rejecting graft. Chronic GVHD was mild and rare. Summary CT-hap-CB resulted in high OS and TFS, especially CT-14 leaded to 100% TFS with low GVHD rate. MSC engraftment improved hematopoietic recovery of UCB. KIR and HLA typing impacted what stem cells engraftment. The multicenter study should be developed in the future. Figure 1 Kinetics of Mixed Chimerism in TM-SCT Figure 1. Kinetics of Mixed Chimerism in TM-SCT Figure 2 Thalassemia-free survive resulted from regimen CT-14 in thalassemia transplant Figure 2. Thalassemia-free survive resulted from regimen CT-14 in thalassemia transplant Disclosures No relevant conflicts of interest to declare.

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