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Analysis of the Spanish CCR5-∆32 inventory of cord blood units: lower cell counts in homozygous donors

Bone Marrow Transplantationvolume 53pages741748 (2018) | Download Citation


The possibility to use CCR5-∆32 umbilical cord blood to cure HIV infection in patients in need of a hematopoietic transplant has been suggested. The less stringent HLA compatibility needed in this type of transplant facilitates the search of a suitable donor having the CCR5-∆32 mutation. To achieve an inventory of CCR5-∆32 cord blood units, the 20,236 best cell quality units of the Spanish Registry were genotyped. Furthermore, their CD34+ and total nucleated cells counts, blood type, gender, HLA and donor’s geographical and ancestral origin were analyzed. The results showed 130 (0.64%) units homozygous for the deletion, 2,646 (13.08%) heterozygous and 17,460 (86.28%) did not present the mutation. Interestingly, a significant lower amount of CD34+ cells was found in the CCR5-∆32 homozygous units. In addition, a significant association was found among donor’s ancestral origin and the mutation, with a higher percentage of CCR5-∆32 units with a European ancestry. In summary, identification of a relatively high number of CCR5-∆32 units is feasible and will facilitate the development of clinical trials for HIV cure in patients requiring hematopoietic transplantation. Further studies are required to understand the significance of lower cell counts within the CCR5-∆32 homozygous group and its clinical impact.

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The authors would like to thank the collaboration from the following institutions and colleagues: Anthony Nolan Research Institute (Alejandro Madrigal), Banco de Cordón del País Vasco (Clara Rodriguez-Ayerbe, Silvia Santos), Banco de Cordón de Valencia (María D. Planelles), Banc de Sang i Teixits de Catalunya (Nina Borràs, José L. Caro, Nerea Castillo, María Piron, Sílvia Saludeda, Mar Sánchez, Laura Mongay), Centro de Transfusión de la Comunidad de Madrid (José L. Vicario), IrsiCaixa (Javier Martínez-Picado). The statistical analysis was performed by the Unidad de Estadística y Bioinformática (UEB) of the Vall d’Hebron Hospital Research Institute (VHIR).


This study was funded by a grant from the Spanish Organización Nacional de Trasplante.

Author information


  1. Banc de Sang i Teixits, Vall d’Hebron Research Institute, Universitat Autònoma de Barcelona (VHIR-UAB), Barcelona, Spain

    • Emma Enrich
    • , Francisco Vidal
    • , Francesc Rudilla
    •  & Sergio Querol
  2. CIBER de Enfermedades Cardiovasculares, Madrid, Spain

    • Francisco Vidal
  3. Banco de Cordón de Andalucía, Centro Transfusión de Málaga, Málaga, Spain

    • Francisco Sánchez-Gordo
    • , Juan M. Gómez-Zumaquero
    •  & Isidro Prat
  4. Banco de Cordón de Madrid, Centro de Transfusión de la Comunidad de Madrid, Madrid, Spain

    • Antonio Balas
    •  & Luisa Barea
  5. Banco de Cordón de Galicia, Axencia Galega de Doazón de Sangue e Tecidos, Santiago de Compostela, Spain

    • Ana Castro
  6. Banco de Cordón de Valencia, Centro de Transfusión de la Comunidad Valenciana, Valencia, Spain

    • Luis Larrea
  7. Banco de Cordón del País Vasco, Centro Vasco de Transfusión y Tejidos Humanos, Galdakao, Spain

    • Miguel A. Perez-Vaquero
  8. Programa Concordia BST, Banc de Sang i Teixits, Barcelona, Spain

    • Sergio Querol
  9. Organización Nacional de Trasplantes (ONT), Madrid, Spain

    • Gregorio Garrido
    •  & Rafael Matesanz
  10. Spanish Bone Marrow Donor Registry (REDMO), Barcelona, Spain

    • Enric Carreras
  11. Hospital Universitario Puerta de Hierro Majadahonda, Universidad Autónoma de Madrid, Majadahonda, Spain

    • Rafael F. Duarte


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The authors declare that they have no conflict of interest.

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Correspondence to Sergio Querol.

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