PMID- 14594509 OWN - NLM STAT- MEDLINE DCOM- 20040609 LR - 20171116 IS - 1525-8165 (Print) IS - 1525-8165 (Linking) VI - 12 IP - 5 DP - 2003 Oct TI - Functional evaluation of proliferative T cell responses in patients with severe T lymphopenia: characterization of optimal culture conditions and standardized activation signals for a simple whole blood assay. PG - 525-35 AB - In this methodological study, we describe an assay for analysis of proliferative T cell responses in patients with severe leukopenia. Severe treatment-induced cytopenia is observed in patients with malignant disorders who receive conventional intensive chemotherapy or autologous stem cell transplantation. The quantitative T cell defect can then be characterized by flow cytometric analysis of membrane molecule expression, whereas the functional status of the remaining T cell population is more difficult to evaluate. In the present study, we describe a standardized whole blood assay that requires small sample volumes and can be used for repeated analysis even in severely ill patients. The assay is based on the following strategy: (i) blood samples are diluted with the serum-free medium X-vivo 10, (ii) T cells are activated either with monoclonal immunoglobulin E (IgE) anti-CD3 or anti-CD3 plus anti-CD28; (iii) T cell proliferation is assayed by [(3)H]thymidine incorporation after 4 days of in vitro culture. These proliferative responses are not affected by the plasma levels of interleukin-2 (IL-2), sIL-2-R alpha, IL-7 and IL-15, and the kinetics of the response are not altered by the presence of exogenous cytokines. Detectable proliferation is observed for most patients with treatment-induced cytopenia. We conclude that the assay can be used for functional characterization of remaining T lymphocytes in patients with severe T lymphopenia. FAU - Wendelbo, Oystein AU - Wendelbo O AD - Division for Hematology, Department of Medicine, Haukeland University Hospital, Bergen, Norway. wend@haukeland.no FAU - Bruserud, Oystein AU - Bruserud O LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Hematother Stem Cell Res JT - Journal of hematotherapy & stem cell research JID - 100892915 RN - 0 (Antibodies, Monoclonal) RN - 0 (Antigens, CD) RN - 0 (CD28 Antigens) RN - 0 (CD3 Complex) RN - 0 (Culture Media) RN - 0 (Interleukins) RN - 0 (Proto-Oncogene Proteins) RN - 83869-56-1 (Granulocyte-Macrophage Colony-Stimulating Factor) RN - EC 2.7.10.1 (FLT3 protein, human) RN - EC 2.7.10.1 (Receptor Protein-Tyrosine Kinases) RN - EC 2.7.10.1 (fms-Like Tyrosine Kinase 3) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Antibodies, Monoclonal/pharmacology MH - Antigens, CD/analysis MH - CD28 Antigens/immunology MH - CD3 Complex/immunology MH - Cell Culture Techniques/methods MH - Cell Division/drug effects MH - Culture Media/pharmacology MH - Drug-Related Side Effects and Adverse Reactions MH - Female MH - Flow Cytometry MH - Granulocyte-Macrophage Colony-Stimulating Factor/pharmacology MH - Humans MH - Interleukins/blood/pharmacology MH - Leukemia/blood/therapy MH - Leukocytes, Mononuclear/chemistry/metabolism MH - Lymphocyte Activation/drug effects/*immunology MH - Lymphopenia/*blood/etiology/immunology MH - Male MH - Middle Aged MH - Multiple Myeloma/blood/therapy MH - Myelodysplastic Syndromes/blood/therapy MH - Proto-Oncogene Proteins/pharmacology MH - Receptor Protein-Tyrosine Kinases/pharmacology MH - Stem Cell Transplantation/adverse effects MH - T-Lymphocytes/cytology/drug effects/*metabolism MH - Time Factors MH - fms-Like Tyrosine Kinase 3 EDAT- 2003/11/05 05:00 MHDA- 2004/06/21 10:00 CRDT- 2003/11/05 05:00 PHST- 2003/11/05 05:00 [pubmed] PHST- 2004/06/21 10:00 [medline] PHST- 2003/11/05 05:00 [entrez] AID - 10.1089/152581603322448231 [doi] PST - ppublish SO - J Hematother Stem Cell Res. 2003 Oct;12(5):525-35. doi: 10.1089/152581603322448231.