التفاصيل البيبلوغرافية
| العنوان: |
Qualification of the differential leukocyte count and immunophenotyping in cryopreserved ex vivo whole blood assay |
| المؤلفون: |
Imbratta, Claire, Gela, Anele, Bilek, Nicole, Mabwe, Simbarashe, Cloete, Yolundi, Mortensen, Rasmus, Borges, Álvaro H., Maenetje, Pholo, Mlotshwa, Mandla, Churchyard, Gavin, Sudi, Lwitiho, Sabi, Issa, Meewes, Peter, Wallis, Carole L., Hatherill, Mark, Scriba, Thomas J., Nemes, Elisa |
| المساهمون: |
Bill and Melinda Gates Foundation, European and Developing Countries Clinical Trials Partnership |
| المصدر: |
Cytometry Part A ; volume 103, issue 12, page 992-1003 ; ISSN 1552-4922 1552-4930 |
| بيانات النشر: |
Wiley |
| سنة النشر: |
2023 |
| المجموعة: |
Wiley Online Library (Open Access Articles via Crossref) |
| الوصف: |
We developed a flow cytometry‐based assay, termed Differential Leukocyte Counting and Immunophenotyping in Cryopreserved Ex vivo whole blood (DLC‐ICE), that allows quantification of absolute counts and frequencies of leukocyte subsets and measures expression of activation, phenotypic and functional markers. We evaluated the performance of the DLC‐ICE assay by determining inter‐operator variability for processing fresh whole blood (WB) from healthy donors collected at multiple clinical sites. In addition, we assessed inter‐operator variability for staining of fixed cells and robustness across different anticoagulants. Accuracy was evaluated by comparing DLC‐ICE measurements to real‐time cell enumeration using an accredited hematology analyzer. Finally, we developed and tested the performance of a 27‐colour immunophenotyping panel on cryopreserved fixed WB and compared results to matched fresh WB. Overall, we observed <20% variability in absolute counts and frequencies of granulocytes, monocytes and lymphocytes (T, B and NK cells) when fresh WB was collected in different anti‐coagulant tubes, processed or stained by independent operators. Absolute cell counts measured across operators and anti‐coagulants using the DLC‐ICE method exhibited excellent correlation with the reference method, complete blood count (CBC) with differential, measured using a hematology analyzer (r 2 > 0.9 for majority of measurements). A comparison of leukocyte immunophenotyping on fresh WB versus DLC‐ICE processed blood yielded equivalent and linear results over a wide dynamic range (r 2 = 0.94 over 10–10 4 cells/μL). These results demonstrate low variability across trained operators, high robustness, linearity and accuracy, supporting utility of the DLC‐ICE assay for large cohort studies involving multiple clinical research sites. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
English |
| DOI: |
10.1002/cyto.a.24793 |
| الإتاحة: |
https://doi.org/10.1002/cyto.a.24793Test |
| حقوق: |
http://creativecommons.org/licenses/by-nc/4.0Test/ |
| رقم الانضمام: |
edsbas.8536674E |
| قاعدة البيانات: |
BASE |
