BackgroundThe graft-versus-leukemia effect is able to induce clinical responses in patients with chronic lymphocytic leukemia treated with a reduced intensity conditioning regimen, followed by allogeneic stem cell transplantation. We investigated whether molecular remissionscould be attained after reduced intensity conditioning and allogeneic stem cell transplantation in patients with relapsed chronic lymphocytic leukemia and whether the assessment of minimal residual disease might be used to predict the clinical outcome.Design and MethodsMinimal residual disease was monitored by polymerase chain reaction using the immunoglobulin heavy-chain gene rearrangement as a molecular marker in 29 relapsed patients who achieved complete remission following reduced intensity conditioning and allogeneic stem cell transplantation. A nested-polymerase chain reaction with patient-specific primers derived from complementarity determining regions (CDR2 and CDR3) was carried out in all the patients. Real-time polymerase chain reaction was performed in patients whose nested reaction gave positive or mixed results.ResultsThree patterns of minimal residual disease were observed: negative (31%), mixed (24%), and always positive (45%). The cumulative incidence of relapse according to the minimal residual disease status at 6 and 12 months after transplantation was significantly differentbetween polymerase chain reaction-negative and -positive patients (p=0.031 and p=0.04, respectively). Two-year disease-free survival was 93% and 46% for polymerase chain reaction-negative and -positive patients at 6 months after transplantation, respectively(p=0.012). Similarly, 2-year disease-free survival was 100% and 57% for polymerase chain reaction-negative and -positive patients at 12 months, respectively (p=0.037). No clinical or biological factors were predictive of the achievement of polymerase chain reaction negativityafter allogeneic stem cell transplantation. Graft-versus-host disease was more frequent in patients who did not relapse (p=0.04). Quantitative monitoring of minimal residual disease was able to identify polymerase chain reaction-positive patients with a higher risk of relapse.ConclusionsThese findings demonstrate that relapsed patients can achieve molecular remission after reduced intensity conditioning and allogeneic stem cell transplantation and suggest a minimal residual disease-driven intervention that might be useful to prevent overt hematologicrelapse.

Qualitative and quantitative polymerase chain reaction monitoring of minimal residual disease in relapsed chronic lymphocytic leukemia: early assessment can predict long-term outcome after reduced intensity allogeneic transplantation / L., Farina; C., Carniti; A., Dodero; A., Vendramin; A., Raganato; F., Spina; F., Patriarca; Narni, Franco; F., Benedetti; A., Olivieri; P., Corradini. - In: HAEMATOLOGICA. - ISSN 0390-6078. - STAMPA. - 94:5(2009), pp. 654-662. [10.3324/haematol.2008.000273]

Qualitative and quantitative polymerase chain reaction monitoring of minimal residual disease in relapsed chronic lymphocytic leukemia: early assessment can predict long-term outcome after reduced intensity allogeneic transplantation

NARNI, Franco;
2009

Abstract

BackgroundThe graft-versus-leukemia effect is able to induce clinical responses in patients with chronic lymphocytic leukemia treated with a reduced intensity conditioning regimen, followed by allogeneic stem cell transplantation. We investigated whether molecular remissionscould be attained after reduced intensity conditioning and allogeneic stem cell transplantation in patients with relapsed chronic lymphocytic leukemia and whether the assessment of minimal residual disease might be used to predict the clinical outcome.Design and MethodsMinimal residual disease was monitored by polymerase chain reaction using the immunoglobulin heavy-chain gene rearrangement as a molecular marker in 29 relapsed patients who achieved complete remission following reduced intensity conditioning and allogeneic stem cell transplantation. A nested-polymerase chain reaction with patient-specific primers derived from complementarity determining regions (CDR2 and CDR3) was carried out in all the patients. Real-time polymerase chain reaction was performed in patients whose nested reaction gave positive or mixed results.ResultsThree patterns of minimal residual disease were observed: negative (31%), mixed (24%), and always positive (45%). The cumulative incidence of relapse according to the minimal residual disease status at 6 and 12 months after transplantation was significantly differentbetween polymerase chain reaction-negative and -positive patients (p=0.031 and p=0.04, respectively). Two-year disease-free survival was 93% and 46% for polymerase chain reaction-negative and -positive patients at 6 months after transplantation, respectively(p=0.012). Similarly, 2-year disease-free survival was 100% and 57% for polymerase chain reaction-negative and -positive patients at 12 months, respectively (p=0.037). No clinical or biological factors were predictive of the achievement of polymerase chain reaction negativityafter allogeneic stem cell transplantation. Graft-versus-host disease was more frequent in patients who did not relapse (p=0.04). Quantitative monitoring of minimal residual disease was able to identify polymerase chain reaction-positive patients with a higher risk of relapse.ConclusionsThese findings demonstrate that relapsed patients can achieve molecular remission after reduced intensity conditioning and allogeneic stem cell transplantation and suggest a minimal residual disease-driven intervention that might be useful to prevent overt hematologicrelapse.
2009
94
5
654
662
Qualitative and quantitative polymerase chain reaction monitoring of minimal residual disease in relapsed chronic lymphocytic leukemia: early assessment can predict long-term outcome after reduced intensity allogeneic transplantation / L., Farina; C., Carniti; A., Dodero; A., Vendramin; A., Raganato; F., Spina; F., Patriarca; Narni, Franco; F., Benedetti; A., Olivieri; P., Corradini. - In: HAEMATOLOGICA. - ISSN 0390-6078. - STAMPA. - 94:5(2009), pp. 654-662. [10.3324/haematol.2008.000273]
L., Farina; C., Carniti; A., Dodero; A., Vendramin; A., Raganato; F., Spina; F., Patriarca; Narni, Franco; F., Benedetti; A., Olivieri; P., Corradini
File in questo prodotto:
File Dimensione Formato  
654.full.pdf

Open access

Tipologia: Versione pubblicata dall'editore
Dimensione 428.15 kB
Formato Adobe PDF
428.15 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/647791
Citazioni
  • ???jsp.display-item.citation.pmc??? 19
  • Scopus 50
  • ???jsp.display-item.citation.isi??? 50
social impact