PMID- 27030155 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20160811 LR - 20160331 IS - 2352-3026 (Electronic) IS - 2352-3026 (Linking) VI - 1 IP - 2 DP - 2014 Nov TI - HLA match likelihoods for Indian patients seeking unrelated donor transplantation grafts: a population-based study. PG - e57-63 LID - S2352-3026(14)70021-3 [pii] LID - 10.1016/S2352-3026(14)70021-3 [doi] AB - BACKGROUND: For patients who do not have a suitable human leukocyte antigen (HLA)-matched family donor, unrelated donor registries of adult volunteers and banked umbilical cord blood (UCB) units provide the potential for successful haemopoietic stem-cell transplantation. The size and genetic composition of such registries determines the proportion of patients who will be able to find a suitable match. We aimed to assess the proportion of positive matches for Indian patients. METHODS: Using HLA data from ten existing donor and UCB registries and clinical transplant centres in India, we built population-based genetic models for 14 Indian regions to model Indian registry growth to predict the likelihood of identifying a suitable donor-either an adult donor or UCB-for Indian patients. We computed ranking tables of the top ten haplotypes in each regional group and compared these with four US samples from the National Marrow Donor Program (NMDP) registry. FINDINGS: The mean proportion of individuals who would have a 10/10 adult donor match within India ranged from 14.4% with a registry size of 25 000 to 60.6% with a registry size of 1 000 000. Only when donor registries increased to 250 000 did the match rate within India exceed that found by searching the US-NMDP registry combined with an Indian registry of 25 000 donors. The proportion of matches increased logarithmically with increased registry size (R(2)=0.993). For a UCB registry size of 25 000, 96.4% of individuals would find a 4/6 match; however, only 18.3% would have a 6/6 match. INTERPRETATION: Serial match modelling and follow-up comparisons can identify the relative and progressively greater value of an India-based donor registry and UCB banking network to serve the Indian population. Understanding regional HLA haplotype diversity could guide registry growth and maximise benefit to patients. Similar modelling could guide planning for the needs of other ethnically distinct populations. FUNDING: University of Minnesota and the Indian Council for Medical Research. CI - Copyright (c) 2014 Elsevier Ltd. All rights reserved. FAU - Maiers, Martin AU - Maiers M AD - National Marrow Donor Program, Minneapolis, MN, USA. Electronic address: mmaiers@nmdp.org. FAU - Halagan, Michael AU - Halagan M AD - National Marrow Donor Program, Minneapolis, MN, USA. FAU - Joshi, Sangeeta AU - Joshi S AD - Manipal Hospital, Bangalore, India. FAU - Ballal, H Sudarshan AU - Ballal HS AD - Manipal Hospital, Bangalore, India. FAU - Jagannatthan, Latha AU - Jagannatthan L AD - Rotary Bangalore-TTK Blood Bank, Bangalore Medical Services Trust, Bangalore, India. FAU - Damodar, Sharat AU - Damodar S AD - Narayana Hrudayalaya, Bangalore, India. FAU - Srinivasan, Periathiruvadi AU - Srinivasan P AD - Jeevan Stem Cell Bank, Chennai, India. FAU - Narayan, Saranya AU - Narayan S AD - Jeevan Stem Cell Bank, Chennai, India. FAU - Khattry, Navin AU - Khattry N AD - Tata Memorial Hospital, Mumbai, India. FAU - Malhotra, Pankaj AU - Malhotra P AD - Post Graduate Institute of Medical Education and Research, Chandigarh, India. FAU - Minz, Ranjana W AU - Minz RW AD - Post Graduate Institute of Medical Education and Research, Chandigarh, India. FAU - Shah, Sandip A AU - Shah SA AD - Gujarat Cancer and Research Institute, Civil Hospital Campus, Ahmedabad, India. FAU - Rajagopal, Raghu AU - Rajagopal R AD - DATRI, Chennai, India. FAU - Cereb, Nezih AU - Cereb N AD - DATRI, Chennai, India; Histogenetics, New York, NY, USA. FAU - Yang, Soo Young AU - Yang SY AD - DATRI, Chennai, India; Histogenetics, New York, NY, USA. FAU - Parekh, Sunil AU - Parekh S AD - Marrow Donor Registry (India), Mumbai, India. FAU - Mammen, Joy AU - Mammen J AD - Christian Medical College, Vellore, India. FAU - Daniels, Dolly AU - Daniels D AD - Christian Medical College, Vellore, India. FAU - Weisdorf, Daniel AU - Weisdorf D AD - Division of Hematology, Oncology and Transplantation, University of Minnesota, MN, USA. LA - eng PT - Journal Article DEP - 20141021 PL - England TA - Lancet Haematol JT - The Lancet. Haematology JID - 101643584 EDAT- 2014/11/01 00:00 MHDA- 2014/11/01 00:01 CRDT- 2016/04/01 06:00 PHST- 2016/04/01 06:00 [entrez] PHST- 2014/11/01 00:00 [pubmed] PHST- 2014/11/01 00:01 [medline] AID - S2352-3026(14)70021-3 [pii] AID - 10.1016/S2352-3026(14)70021-3 [doi] PST - ppublish SO - Lancet Haematol. 2014 Nov;1(2):e57-63. doi: 10.1016/S2352-3026(14)70021-3. Epub 2014 Oct 21.