ArticleTransfusion2026
ABO blood type concordance-dependent variations in umbilical cord blood: Insights from twin pregnancies.
Article in Transfusion, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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9 authors.
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Abstract
backgroundUmbilical cord blood (UCB) is a rich source of hematopoietic stem and progenitor cells for regenerative medicine. This study characterized the cellular composition of UCB from twin pregnancies to identify blood type concordance (BTC)-related differences. STUDY DESIGN AND
methodsA cross-sectional study was conducted at the Vinmec Tissue Biobank, involving 128 twin deliveries (2019-2023). Linear correlation and mixed-effect modeling were employed to analyze relationships between cellular factors and BTC in twins.
resultsMaternal and gestational ages were 31.9 ± 5.56 years and 36.7 ± 1.42 weeks. Neonatal weight averaged 2470.68 ± 382.5 g, with ABO blood type discordance (ABO-BTD) twins significantly heavier than ABO-BTC twins (p < 0.05). UCB volume exceeded 100 mL, positively correlating with birth weight and cellular yields. BTC twins exhibited higher pre-processing mononuclear cell (MNC) and lymphocyte-monocyte (L-M) counts and post-processing white blood cell (WBC) and MNC counts. Recovery rates for total nucleated cells (TNCs) and MNCs were 86.14 ± 15.72% and 96.47 ± 17.77%. CD34+ cell counts were higher in the BTD twins (p < 0.05), while hematocrit was lower (p < 0.05). Strong positive correlations were found between UCB volume and TNC, MNC, and CD34+ counts, whereas hematocrit showed weak or negative associations. Mixed-effect modeling confirmed higher TNC and WBC counts in BTD twins before and after processing (p < 0.05), independent of intra-pair variability.
conclusionABO-BTC significantly influences UCB cellular yield, with ABO-BTD twins offering superior hematopoietic stem cell recovery potential for cord blood banking and clinical use.
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