TY - JOUR
T1 - Chronic lymphocytic leukemia specific T-cell subset alterations are clone-size dependent and not present in monoclonal B lymphocytosis
AU - te Raa, G. Doreen
AU - Tonino, Sanne H.
AU - Remmerswaal, Ester B. M.
AU - van Houte, Arend Jan
AU - Koene, Harry R.
AU - van Oers, Marinus H.
AU - Kater, Arnon P.
PY - 2012
Y1 - 2012
N2 - In patients with chronic lymphocytic leukemia (CLL), effector and memory CD4 + and CD8 + T cells are expanded. We investigated whether these CLL specifi c T-cell expansions also occur in monoclonal B lymphocytosis (MBL), the pre-leukemic state of CLL, which is currently distinguished from CLL by an arbitrarily chosen cut-off value of CD19 of 5.0 x 10(9)/L. Whereas an increase in effector and memory CD4 + and CD8 + T cells was found in CLL, these expansions could not be found in MBL. Although a significant correlation was found between absolute B cell count (CD19) and T cell numbers, correlation coefficients were rather low. Therefore, we analyzed whether an optimal threshold for CD19 number could be defined which best related to an expansion of T cells. The B-cell threshold that best predicted expansion of CD3 +, CD4 + and CD8 + T cells, respectively, was 10 x 10(9)/L. Our study indicates that a higher cut-off value than the current 5.0 x 10(9)/L relates better to the biological impact of CLL
AB - In patients with chronic lymphocytic leukemia (CLL), effector and memory CD4 + and CD8 + T cells are expanded. We investigated whether these CLL specifi c T-cell expansions also occur in monoclonal B lymphocytosis (MBL), the pre-leukemic state of CLL, which is currently distinguished from CLL by an arbitrarily chosen cut-off value of CD19 of 5.0 x 10(9)/L. Whereas an increase in effector and memory CD4 + and CD8 + T cells was found in CLL, these expansions could not be found in MBL. Although a significant correlation was found between absolute B cell count (CD19) and T cell numbers, correlation coefficients were rather low. Therefore, we analyzed whether an optimal threshold for CD19 number could be defined which best related to an expansion of T cells. The B-cell threshold that best predicted expansion of CD3 +, CD4 + and CD8 + T cells, respectively, was 10 x 10(9)/L. Our study indicates that a higher cut-off value than the current 5.0 x 10(9)/L relates better to the biological impact of CLL
U2 - https://doi.org/10.3109/10428194.2012.698277
DO - https://doi.org/10.3109/10428194.2012.698277
M3 - Article
C2 - 22646856
SN - 1042-8194
VL - 53
SP - 2321
EP - 2325
JO - Leukemia & lymphoma
JF - Leukemia & lymphoma
IS - 11
ER -