Journals / Turkish Journal of Hematology / 2017 / Cilt: 34 - Sayı: 4

İnsan Göbek Kordon Kanı Hematopoetik Kök Hücre Değerlendirmesinde Hızlı ve Etkin Bir Değerlendirme Yöntemi: Akım Sitometrik Aldehit Dehidrogenaz Testi

Pages
314–320
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Thus, this fast, inexpensive method has the potential to overcome the weaknesses of other techniques.

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: Colony-forming units of granulocytes/macrophages (CFU-GM) analysis is the most widely used method to determine the hematopoietic stem cell (HSC) content of human umbilical cord blood (CB) for prediction of engraftment potential.
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Key Findings & Data:Materials and Methods: In this study, flow cytometric quantitation of CD34+ cells and ALDH positivity along with CFU-GM capacity were assessed in fresh and post-thaw CB units.
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Conclusion & Impact:Thus, this fast, inexpensive method has the potential to overcome the weaknesses of other techniques.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: Colony-forming units of granulocytes/macrophages (CFU-GM) analysis is the most widely used method to determine the hematopoietic stem cell (HSC) content of human umbilical cord blood (CB) for prediction of engraftment potential. The measurement of aldehyde dehydrogenase (ALDH) activity is a more recent method for HSC qualification. Our aim was to correlate phenotypic and functional assays to find the most predictive method. Materials and Methods: In this study, flow cytometric quantitation of CD34+ cells and ALDH positivity along with CFU-GM capacity were assessed in fresh and post-thaw CB units. Results: Among 30 post-processing samples, for each CB unit the mean total number of nucleated cells (TNCs) was (93.8±30.1)x107 , CD34+ cells were (3.85±2.55)x106 , ALDH+ cells were (3.14±2.55)x106 , and CFU-GM count was (2.64±1.96)x105 . Among an additional 19 postthaw samples the cell counts were as follows: TNCs, (32.79±17.27)x107 ; CD34+, (2.18±3.17)x106 ; ALDH+, (2.01±2.81)x106 ; CFU-GM, (0.74±0.92) x105 . Our findings showed that in fresh samples TNCs, CD34+ cells, and ALDH correlated highly with counts of CFU-GM, CFU-erythroids/ granulocytes-macrophages/megakaryocytic cells (GEMM), and burst forming units of erythroids (BFU-E) as follows: TNCs, r=0.47, r=0.35, r=0.41; CD34+, r=0.44, r=0.54, r=0.41; and ALDH, r=0.63, r=0.45, r=0.6, respectively. In terms of post-thaw samples, the correlations were as follows: TNCs, r=0.59, r=0.46, r=0.56; CD34+, r=0.67, r=0.48, r=0.61; and ALDH, r=0.61, r=0.67, r=0.67, for CFU-GM, CFU-GEMM, and BFU-E, respectively. All correlations were statistically significant. Conclusion: In our experience, HSC assessment by ALDH activity yields the highest correlation with conventional analytical methods, particularly for post-thaw samples. Thus, this fast, inexpensive method has the potential to overcome the weaknesses of other techniques.

Özet

Amaç: Granülositer makrofaj koloni oluşturma (CFU-GM) testi kordon kanı (KK) hematopoietik kök hücre engrafman potensiyelini ölçmek için kullanılan bir yöntemdir. Aldehit dehidrogenaz (ALDH) enzimi ölçüm yöntemide hematopoetik kök hücre (HKH) kalitesini belirlemek amacıyla kullanılan daha yeni bir metottur. Çalışmamızda fenotipik ve fonksiyonel olarak korelasyon analizi yapılarak HKH ölçümünde en etkili metodu bulmayı amaçladık. Gereç ve Yöntemler: Bu çalışmada taze ve donma çözme sonrası KK ünitelerinde CD34+ ve ALDH+ hücrelerle CFU-GM kapasiteleri araştırılmıştır. Bulgular: Otuz taze KK ünitesinde her KK için ortalama değerler: Toplam çekirdekli hücre sayısı (TNC): 93,8±30,1x107 , CD34+: 3,85±2,55x106 , ALDH+: 3,14±2,55 x106 , CFU-GM: 2,64±1,96x105 . On dokuz KK ünitesinde donma çözme sonrası hücre değerleri: TNC: 32,79±17,27x107 , CD34+: 2,18±3,17x106 , ALDH+: 2,01±2,81x106 , CFUGM: 0,74±0,92x105'dir. Bulgularımız; taze KK'da TNC, CD34 ve ALDH; CFU-GM, CFU-GEMM ve BFU-E ile korelasyon gösterirken (TNC, r=0,47, r=0,35, r=0,41; CD34+, r=0,44, r=0,54 r=0,41; ve ALDH, r=0,63 r=0,45 r=0,6) donma çözme sonrası KK'da korelasyon sırasıyla CFU-GM, CFU-GEMM, ve BFU-E için, TNC r=0,59, r=0,46, r=0,56, CD34+ r=0,67, r=0,48, r=0,61 ve ALDH r=0,61, r=0,67, r=0,67 olarak saptanmıştır. Bütün bulgularımız istatistiksel olarak anlamlı çıkmıştır. Sonuç: Çalışmamız, ALDH aktivitesi tayin metodu HKH tayininde geleneksel yöntemlerle özellikle donma çözme sonrası örnekler açısından korelasyon göstermiştir. Böylelikle hızlı, ucuz bir metod olarak ALDH diğer HKH belirlemede kullanılan yöntemlere üstün olabilecek kapasitededir

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Cite This Article

GENÇER, E. B., MESUTOĞLU, P. Y., DALVA, K., BEKSAÇ, M. (2017). İnsan Göbek Kordon Kanı Hematopoetik Kök Hücre Değerlendirmesinde Hızlı ve Etkin Bir Değerlendirme Yöntemi: Akım Sitometrik Aldehit Dehidrogenaz Testi. Turkish Journal of Hematology, Cilt: 34 - Sayı: 4, 314–320. https://ajindex.com/articles/412743

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References (12)

  1. Wognum B, Yuan N, Lai B, Miller CL. Colony forming cell assays for human hematopoietic progenitor cells. Methods Mol Biol 2013;946:267-283
  2. Migliaccio AR, Adamson JW, Stevens CE, Dobrila NL, Carrier CM, Rubinstein P. Cell dose and speed of engraftment in placental/umbilical cord blood transplantation: graft progenitor cell content is a better predictor than nucleated cell quantity. Blood 2000;96:2717-2722
  3. Leuner S, Arland M, Kahl C, Jentsch-Ullrich K, Franke A, Höffkes HG. Enumeration of CD34-positive hematopoietic progenitor cells by flow cytometry: comparison of a volumetric assay and the ISHAGE gating strategy. Bone Marrow Transplant 1998;22:699-706
  4. Beksac M, Preffer F. Is it time to revisit our current hematopoietic progenitor cell quantification methods in the clinic? Bone Marrow Transplant 2012;47:1391-1396
  5. Frandberg S, Borestrom C, Li S, Fogelstrand L, Palmqvist L. Exploring the heterogeneity of the hematopoietic stem and progenitor cell pool in cord blood: simultaneous staining for side population, aldehyde dehydrogenase activity, and CD34 expression. Transfusion 2015;55:1283-1289
  6. Balber AE. Concise review: aldehyde dehydrogenase bright stem and progenitor cell populations from normal tissues: characteristics, activities, and emerging uses in regenerative medicine. Stem Cells 2011;29:570-575
  7. Lee HR, Shin S, Yoon JH, Roh EY, Kim BJ, Song EY. Aldehyde dehydrogenasebright cells correlated with the colony-forming unit-granulocytemacrophage assay of thawed cord blood units. Transfusion 2014;54:1871- 1875
  8. Christ O, Lucke K, Imren S, Leung K, Hamilton M, Eaves A, Smith C, Eaves C. Improved purification of hematopoietic stem cells based on their elevated aldehyde dehydrogenase activity. Haematologica 2007;92:1165-1172
  9. Putman DM, Liu KY, Broughton HC, Bell GI, Hess DA. Umbilical cord bloodderived aldehyde dehydrogenase-expressing progenitor cells promote recovery from acute ischemic injury. Stem Cells 2012;30:2248-2260
  10. Gentry T, Deibert E, Foster SJ, Haley R, Kurtzberg J, Balber AE. Isolation of early hematopoietic cells, including megakaryocyte progenitors, in the ALDH-bright cell population of cryopreserved, banked UC blood. Cytotherapy 2007;9:569-576
  11. Shoulars K, Noldner P, Troy JD, Cheatham L, Parrish A, Page K, Gentry T, Balber AE, Kurtzberg J. Development and validation of a rapid, aldehyde dehydrogenase bright-based cord blood potency assay. Blood 2016;127:2346-2354
  12. Lioznov MV, Freiberger P, Kroger N, Z