Assessing the HLA diversity of cord blood units collected from a birth clinic caring for pregnant women in an ethnically diverse metropolitan area.

BACKGROUND: New strategies are emerging in cord blood banking where focusing on birth clinics caring for a high number of mothers belonging to ethnic minorities could offer new possibilities for allotransplantation both for patients of European origin and for patients from ethnic minorities or mixed ancestries. STUDY DESIGN AND METHODS: Marseilles Cord Blood Bank works with one university birth clinic caring for a culturally and sociologically diverse population. Stringent French legal restrictions apply to recording the geographic origin of parents. To circumvent this limitation and evaluate the contribution of newly banked cord blood units (CBUs) to increasing HLA diversity, we applied an algorithm that allows for the determination of parents' putative haplotypes and thus grossly deduce information on their ancestry. Generic resolution HLA-A, HLA-B, and allelic resolution HLA-DRB1 genotyping for 328 CBUs and 2691 unrelated donors (UDs) between January 2009 and May 2012 were performed. Enrichment from international CBU registry with nonreferenced generic HLA-A, HLA-B, and allelic HLA-DRB1 phenotypes was compared between CBUs identified with one or two non-European haplotypes and CBUs identified with two European haplotypes. RESULTS: Marseilles CBUs display an increased proportion of HLA antigens frequently expressed in African populations compared to UDs. Whereas 93% of 199 CBUs identified with one or two non-European haplotypes enrich international CBU registry, this result is reduced to 42% for the 129 CBUs identified with two European haplotypes. CONCLUSION: This study supports a new method to assess HLA diversity. However, such an increased of HLA diversity raises questions about frequencies of CBUs released and clinical relevance from their uses.

[Perception by cancer patients of biomedical research in the era of large-scale biobanking]. / La recherche biomédicale à l'ère des tumorothèques - Point de vue des patients atteints de cancer.

In French hospitals, patients are increasingly asked to participate in research, particularly in oncology where the development of research is stimulated at a national level (plan Cancer). This article express our thoughts based on the literature about the perception by cancer patients of research activities developed in the care centre where they are treated. We focus mainly on the consent for biobanking in a context in which cancer patients are routinely requested to donate tumour samples for research. This article presents the results of a survey among patients treated in a comprehensive cancer centre. The available literature shows that patients have an overall positive image of medical research and of the existence of research activities intertwined with medical care. Patients are globally expressing a wish for more proposals to participate in research in collaboration with scientific teams.