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The sample processing time interval as an influential factor in flow cytometry analysis of lymphocyte subsets.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Santos, Ana Paula Pires Dos Bertho, Álvaro Luiz Martins, Reinaldo Menezes Marcovistz, Rugimar |
| Copyright Year | 2007 |
| Abstract | The objective of this paper is to propose a protocol to analyze blood samples in yellow fever 17DD vaccinated which developed serious adverse events. We investigated whether or not the time between sample collection and sample processing could interfere in lymphocyte subset percentage, for it is often impossible to analyze blood samples immediately after collection due to transport delay from collection places to the flow cytometry facility. CD4+CD38+ T, CD8+CD38+ T, CD3+ T, CD19+ B lymphocyte subsets were analyzed by flow cytometry in nine healthy volunteers immediately after blood collection and after intervals of 24 and 48 h. The whole blood lysis method and gradient sedimentation by Histopaque were applied to isolate peripheral blood mononuclear cells for flow cytometry analyses. With the lysis method, there was no significant change in lymphocyte subset percentage between the two time intervals (24 and 48 h). In contrast, when blood samples were processed by Histopaque gradient sedimentation, time intervals for sample processing influenced the percentage in T lymphocyte subsets but not in B cells. From the results obtained, we could conclude that the whole blood lysis method is more appropriate than gradient sedimentation by Histopaque for immunophenotyping of blood samples collected after serious adverse events, due to less variation in the lymphocyte subset levels with respect to the time factor. |
| Starting Page | 199 |
| Ending Page | 205 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.scielo.br/pdf/mioc/v102n1/5660.pdf |
| PubMed reference number | 17294011v1 |
| Volume Number | 102 |
| Issue Number | 1 |
| Journal | Memorias do Instituto Oswaldo Cruz |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Adverse event B-Lymphocyte Subsets Blood specimen Flow Cytometry Gradient Immunophenotyping Lymphocyte Subset Peripheral blood mononuclear cell (cell) Sedimentation procedure Specimen Collection Subgroup Yellow Fever Vaccine childhood lymphocyte depletion Hodgkin's lymphoma histopaque pathologic cytolysis |
| Content Type | Text |
| Resource Type | Article |
