2006, Number 2
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Med Int Mex 2006; 22 (2)
The Mexican method to perform bone marrow transplantation broke dogmas and favored a lot of patients
Ruiz AGJ, Suárez GL, Gómez AD
Language: Spanish
References: 66
Page: 128-138
PDF size: 248.51 Kb.
ABSTRACT
Several dogmas have been broken as a consequence of the evolution of knowledge in the area of allogeneic hematopoietic stem cell transplantation. It is now clear that:
a) for the successful engraftment of hematopoietic stem cell transplantation bone marrow ablation of the recipient is not required,
b) hematopoietic stem cell transplantation create its own space through graft
versus host reactions,
c) several malignancies can be eradicated by the graft
versus tumor effect,
d) hematopoietic stem cell allografting can be conducted on an outpatient basis,
e) hematopoietic stem cell allografting can be done in aged or debilitated individuals,
f) hematopoietic stem cell allografting can be achieved without transfusion of blood products, and
g) the costs of the allografting procedures can be substantially diminished. The use of non-myeloablative conditioning for stem cell allografting has been the main reason to break these dogmas: using the “Mexican” non-ablative conditioning regimen, we have allografted over 300 individuals in five different Latin American countries. With a median cost of 20,000 US dollars, we have allografted individuals with malignant and benign hematological diseases. The best results have been obtained in chronic myelogenous leukemia in chronic phase (92% survival at 750 days), whereas the worse results were obtained in relapsed acute lymphoblastic leukemia (22% survival at 1,600 days), with intermediate results for aplastic anemia (91% survival at 1,500 days) and acute myelogenous leukemia (66% survival at 860 days). Despite the fact that hematopoietic stem cell allografting with reduced intensity conditioning may be related with several disadvantages, such as mixed chimerism and relapse of the malignancy, breaking these dogmas has resulted in availability of hematopoietic stem cell allografting to a larger number of individuals worldwide, thus offering true curative therapeutic options to patients who otherwise would not qualify to be given these opportunities. Interestingly, the “Mexican method” to conduct bone marrow transplantation has not escaped the “Matthew effect”; our method, which has been used in several countries, and is endowed with several advantages over other procedures is frequently overlooked in reviews or papers dealing with the topic.
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