scholarly journals Contribution of Flow Cytometry Immunophenotyping in Diagnostic of Acute and Chronic Leukemias

Blood ◽  
2018 ◽  
Vol 132 (Supplement 1) ◽  
pp. 5198-5198
Author(s):  
Aldair Sousa Paiva ◽  
Hugo Diogenes De Oliveira Paiva ◽  
Geraldo Barroso Cavalcanti ◽  
Lenilton Silva Silveira ◽  
Lorena KF Silva ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Chronic Lymphocytic Leukemia ◽  
Peripheral Blood ◽  
Conflicts Of Interest ◽  
Lymphoblastic Leukemia ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
Acute Leukemias ◽  
Cell Chronic Lymphocytic Leukemia ◽  
Bone Morrow

Abstract BACKGROUND: Today immunophenotyping by flow cytometry is an useful adjunct to cytomorphologyc analysis to correct diagnostic of leukemias. It provides objective and quantitative data allowing for a high level of sensitivity detection and better characterization of acute and chronic leukemias. The purpose of this study was to demonstrate the contribution of the immunophenotyping by monoclonal antibodies (Mo.Ab.) in leukemic cells from patients with acute and chronic leukemias. METHODS: Analyzed 76 patients with leukemias before the treatment. The diagnostic of leukemias was based on the morphological and immunophenotyping analysis of leukemic cells from peripheral blood and bone morrow. The cytomorphologycal analysis was based on French - American - Britsh criteria (FAB classification) in blood and bone marrow films stain by leishmann and the immunophenotyping by flow cytometry with a panel of Mo.Ab. specific to acute leukemias as: CD1a, CD2, CD3, CD4, CD5, CD8, CD7, CD10, CD13, CD19, CD20, CD103, CD22, CD33, CD34, CD117, CD38, HLADR, TdT, anti-mieloperoxidase, anti-IgM and anti-kappa and lambda light chain. Further clinical and laboratory information as age, sex, presence of tumoral mass, lymphadenopathy, hepatosplenomegaly, hemoglobin determination, total and specific white cell count and cytomorphological analysis of blood film and bone morrow smear. RESULTS: Thirty four patients presented acute myeloid leukemia (AML), twenty acute lymphoblastic leukemia (ALL), nineteen B-cell chronic lymphocytic leukemia (B-CLL), two T-cell chronic lymphocytic leukemia and one case was hairy cell leukemia (HCL). Males were more frequently found in all types of leukemias. ALL were more observed in children (age < 15 years old) and in AML however were more frequently in adults patients. The chronic leukemias were presented in patients with 50 years old or more in all cases. The correlation between the immunophenotyping and clinical pathological profile of these leukemias demonstrated that ALL were more associated to lymphadenopathy, AML to hepatosplenomegaly, and CLL to lymphadenopathy and high count of white cells in peripheral blood. The thrombocytopenia and anemia were found in more cases of acute leukemia. CONCLUSION: This date suggest that today the immunophenotyping by flow cytometry is an important methodology to diagnostic and classification of leukemias. Disclosures No relevant conflicts of interest to declare.

Increased CD39 Expression on CD4+ T-Lymphocytes Has Clinical and Prognostic Significance in Chronic Lymphocytic Leukemia,

Blood ◽  
2011 ◽  
Vol 118 (21) ◽  
pp. 3895-3895
Author(s):  
Yair Herishanu ◽  
Inbal Hazan-Hallevi ◽  
Sigi Kay ◽  
Varda Deutsch ◽  
Aaron Polliack ◽  
...  
Keyword(s):  
T Cells ◽  
Chronic Lymphocytic Leukemia ◽  
T Lymphocytes ◽  
Peripheral Blood ◽  
Conflicts Of Interest ◽  
Prognostic Significance ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
Anti Inflammatory

Abstract Abstract 3895 Chronic lymphocytic leukemia (CLL) cells depend on their microenvironment for proliferation and survival. Ectonucleotidase CD39 has anti-inflammatory properties as it hydrolyzes pro-inflammatory extra-cellular ATP, generates anti-inflammatory adenosine and also protects regulatory T cells from ATP-induced cell death. In this study we investigated the clinical significance of CD39 expression on CD4+T-cells in 45 patients with CLL as well as its compartmental regulation and explored the possible mechanisms for its induction. Compared to healthy individuals, CD4+CD39+ lymphocytes were increased in the peripheral blood of patients with CLL (4.6%±2.28 vs. 17.3%±12.49, respectively, p=0.004), and correlated with advanced stage of disease (9.72%±5.76, 18.15%±12.03 and 25.90%±16.34, of CD4+ lymphocytes, in patients with Rai stages 0, 1+2 and 3+4, respectively, p=0.019). CD4+CD39+ cells were also higher in patients with CLL who needed therapeutic intervention (untreated; 12.99%±10.63 vs treated; 22.21%±12.88, p=0.01) and in those who were ZAP70+ or had b2-microglobulin levels>3g/L. There were more CD4+CD39+ lymphocytes in the bone marrow compartment (22.25%±16.16) than in the peripheral blood (16.60%±15.84, p=0.009). In-vitro studies showed that CD39 can be induced on CD4+cells by exposure to ATP or indirectly, following B-cell receptor (BCR) engagement (CD4+CD39+ lymphocytes increased by 1.56 fold, in the BCR engaged samples compared to their paired controls; 20.27%±11.3 vs. 13%±9.42, respectively, p=0.0006). Conclusions: Increased CD39 expression on CD4+ T-lymphocytes in CLL associates with an aggressive disease. This may reflect the ability of the leukemic cells to suppress the surrounding immune environment, and contribute to a poorer prognosis. CD39+ may also serve as a future target for the development of novel therapies with immune modulating anti–tumor agents in CLL. Disclosures: No relevant conflicts of interest to declare.

CD38 expression as an important prognostic factor in B-cell chronic lymphocytic leukemia

Blood ◽  
2001 ◽  
Vol 98 (1) ◽  
pp. 181-186 ◽  
Author(s):  
Sherif Ibrahim ◽  
Michael Keating ◽  
Kim-Anh Do ◽  
Susan O'Brien ◽  
Yang O. Huh ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Prognostic Factor ◽  
Chronic Lymphocytic Leukemia ◽  
B Cell ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
Aggressive Disease ◽  
Cd38 Expression ◽  
Important Prognostic Factor ◽  
Cell Chronic Lymphocytic Leukemia

Abstract CD38 is a transmembrane glycoprotein expressed on the surface of leukemic cells in a significant percentage of patients with B-cell chronic lymphocytic leukemia (B-CLL). A recent study suggested that CD38 expression has prognostic value in CLL. Peripheral blood samples from 218 patients with B-CLL were analyzed by flow cytometry for CD38 expression on CD5/19+ leukemic cells. Various patient characteristics were studied including age, sex, Rai and Binet stages, splenomegaly, hepatomegaly, hemoglobin (Hgb) level, β-2 microglobulin (β2M) level in the serum, number of nodal sites involved with disease, and length of survival. The Kaplan-Meier method was used to construct survival curves, and the log-rank statistic was used to compare these curves. CD38 was expressed in 20% or more of leukemic cells in 43% of the patients. Patients with high CD38 expression (20% or more) had significantly shorter survival times (P =.00005). Multivariate analyses showed that CD38 expression is an important prognostic factor associated with high incidence of lymph node involvement (P = .004), lower hemoglobin level (P = .001), hepatomegaly (P = .05), and high β2M level (P = .00005). CD38 expression identified a group of patients with aggressive disease that was considered by Rai staging to be early-stage disease (Rai stages 0-II). Patients with CD38+ samples have significantly aggressive disease regardless of their clinical stage. Measurement of CD38 expression by flow cytometry should become a routine test in the evaluation of patients with CLL.

The Earliest Activation Marker CD69 Is An Independent and Strong Progression Indicator in B-Cell Chronic Lymphocytic Leukemia.

Blood ◽  
2009 ◽  
Vol 114 (22) ◽  
pp. 2359-2359
Author(s):  
Giovanni Del Poeta ◽  
Maria Ilaria Del Principe ◽  
Cristina Simotti ◽  
Francesco Buccisano ◽  
Luca Maurillo ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Multivariate Analysis ◽  
Prognostic Factor ◽  
Chronic Lymphocytic Leukemia ◽  
B Cell ◽  
Conflicts Of Interest ◽  
Lymphocytic Leukemia ◽  
Significant Prognostic Factor ◽  
Therapeutic Decisions ◽  
Cell Chronic Lymphocytic Leukemia

Abstract Abstract 2359 Poster Board II-336 B-cell chronic lymphocytic leukemia (B-CLL) exhibits features of activated and antigen-experienced B-lymphocytes and CD69 overexpression resembles B cells at an earlier and greater state of activation (Damle, 2002 and 2007). Moreover, the recent in vitro generation of anti-CD69 monoclonal antibodies able to inhibit either tumor growth or enhance NK cell function (Esplugues, 2005) prompt us to extensively evaluate CD69 antigen in our B-CLL cases. The primary endpoints of our research were: 1) to determine progression-free survival (PFS) and overall survival (OS) upon CD69; 2) to assess the additive prognostic value of CD69 and ZAP-70 and finally 3) to confirm CD69 as an independent prognostic factor. We investigated 401 patients (pts), median age 65 years, 219 males and 182 females. With regard to modified Rai stages, 120 pts had a low stage, 263 an intermediate stage and 18 a high stage. ZAP-70 and CD69 were determined by multicolor flow cytometry, fixing the cut-off values > 20% and >30%, respectively. ZAP-70+ and CD69+ pts were 166/401 (41%) and 108/401 (27%), respectively. CD69 lower than 30% was significantly associated with low Rai stage (105/120; P<0.0001), lymphocyte doubling time >12 months (258/332; P=0.00001), beta-2 microglobulin (B-2M) <2.2 mg/dl (181/223; P=0.00004) and soluble CD23 <70 U/ml (196/240; P<0.00001). There were significant correlations between lower CD69 and IgVH gene mutated status (283 total cases, 150/210; P=0.0001) or low risk (normal or 13q-) FISH cytogenetics (296 total cases, 149/213; P<0.00001). Equally, a strict association was found between lower CD69 and lower ZAP-70 (185/293; P=0.0003). With regard to clinical outcome, both a shorter PFS and OS were observed in ZAP-70+ pts (6% vs 56% at 12 years and 30% vs 95% at 16 years; P<0.00001) as well as in CD69+ pts (9% vs 49% at 14 years, P<0.00001 and 49% vs 75% at 16 years; P=0.00002). Noteworthy, ZAP-70 and CD69 showed additive prognostic properties, since ZAP-70 <20% plus CD69 <30% identified a B-CLL subset at better prognosis with regard to PFS (65% vs 2% at 12 years; P<0.00001, Figure) and OS (97% vs 35% at 14 years; P<0.00001). The two discordant subsets (CD69+ZAP-70 negative and CD69-ZAP-70+) showed an intermediate outcome (Figure). In multivariate analysis of PFS, CD69 (P=0.001) and ZAP-70 (P=0.005) together with cytogenetics and B-2M were confirmed to be independent prognostic factors. On the other hand, with regard to multivariate analysis of OS, age > or < 60 years resulted to be the most significant prognostic factor (P=0.004) followed by CD38 (P=0.01), IgVH status (P=0.02) and ZAP-70 (P=0.04). In conclusion, CD69 antigen, determined by flow cytometry, should be considered a novel important prognostic parameter in B-CLL and its easy and rapid laboratory determination may allow us to identify early progressive pts in order to take timely therapeutic decisions. Disclosures: No relevant conflicts of interest to declare.

Phase IIa Study of the Anti-CXCL12/SDF-1 Spiegelmer® Nox-A12 Alone and Combined with Bendamustine/Rituximab in Patients with Relapsed Chronic Lymphocytic Leukemia (CLL)

Blood ◽  
2012 ◽  
Vol 120 (21) ◽  
pp. 4593-4593
Author(s):  
Marco Gobbi ◽  
Federico Caligaris-Cappio ◽  
Marco Montillo ◽  
Stephanie Vauléon ◽  
Stefan Zöllner ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Plasma Concentration ◽  
Chronic Lymphocytic Leukemia ◽  
Healthy Volunteers ◽  
Peripheral Blood ◽  
Combined Treatment ◽  
Single Agent ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
Cd34 Cells

Abstract Abstract 4593 Background NOX-A12 is a novel, potent, L-aptamer inhibitor of CXCL12/SDF-1, a chemokine which attracts and activates immune- and non-immune cells. The signaling of CXCL12 has been shown to play an important role in the pathophysiology of chronic lymphocytic leukemia (CLL), especially in the interaction of leukemic cells with their tissue microenvironment. The therapeutic concept of NOX-A12 is to inhibit such tumor-supporting pathways and thereby sensitizing the CLL cells towards chemotherapy. Methods The purpose of this phase IIa study is to evaluate the safety and efficacy of NOX-A12 in combination with background chemo-immunotherapy of bendamustine and rituximab (BR) in patients with relapsed CLL. The described study is being performed in compliance with ethical principles based on the Declaration of Helsinki and ICH-GCP guidelines. The study population was split into a pilot and expansion group. In the pilot group, 3 cohorts of 3 patients each received escalating doses of single agent NOX-A12 two weeks prior to the combined treatment of NOX-A12 and BR. Interim data from these patients are reported. Based on previous Phase I studies in healthy volunteers, pilot patients received a dose of 1, 2 or 4 mg/kg body weight (BW) single agent NOX-A12 on day -14, followed by a 2-weeks period of safety, PK and PD assessments prior to the combined treatment with NOX-A12 and BR. To date, the first cohort of the pilot group already progressed to the 2nd cycle of combined treatment. Evaluation criteria included adverse events according to CTCAE V4, flow cytometry of peripheral blood CD34+ cells and CLL cells, pharmacokinetics of NOX-A12, plasma concentration of CXCL12 and tumor response (NCI-WG 1996 criteria, updated 2008). Results To date 3 patients (age range: 58 – 65 years) have been enrolled in the pilot group of this study. They had received 1 or 2 prior therapies, but no bendamustine. Single i.v. doses of 1 mg/kg BW NOX-A12 had no clinically relevant effects on vital signs, 12-lead ECG parameters and laboratory parameters. One patient reported grade 1 pain in the lower limbs two days after treatment with NOX-A12. This event was not dose-limiting and resolved spontaneously on the same day. Flow cytometry of CD34+ cells and CLL cells (CD19+/CD5+high) showed a rapid mobilization of these cells into the peripheral blood on day 1. Interestingly, return to baseline was not complete at the last assessment on day 3 (for details see Figure 1). The NOX-A12 pharmacokinetics in these 3 patients (for concentration-time profile see Figure 2) is very comparable to healthy volunteers receiving i.v. NOX-A12, with a maximum plasma concentration of 1.52 ± 0.14 μM after 1 h (tmax) and a plasma elimination half-life of about 50 h. As seen in healthy volunteers the plasma concentration of CXCL12 increased upon NOX-A12 treatment and reached a maximum of 0.434 ± 0.076 μM at 24 to 72 h p.a. without ever approaching the plasma concentration of NOX-A12 (Figure 2). Conclusion Single i.v. doses of NOX-A12 at 1 mg/kg BW were safe and well tolerated; the maximum tolerated dose was not reached. NOX-A12 induced a long-lasting mobilization of CD34+ cells and leukemic cells in patients with relapsed CLL, consistent with a mechanism of action based on CXCL12 inhibition. Patient accrual and identification of an optimal chemosensitization regimen of NOX-A12 combined with BR is being continued. Disclosures: Vauléon: NOXXON Pharma AG: Employment. Zöllner:NOXXON Pharma AG: Employment. Dümmler:NOXXON Pharma AG: Employment. Kruschinski:NOXXON Pharma AG: Employment. Fliegert:NOXXON Pharma AG: Employment.

scholarly journals Detection of CD5 in B-cell chronic lymphoproliferative diseases by flow cytometry: a strong expression in B-cell chronic lymphocytic leukemia

2005 ◽  
Vol 20 (suppl 1) ◽  
pp. 56-62
Author(s):  
Geraldo Barroso Cavalcanti Júnior ◽  
Valeria Soraya de Farias Sales ◽  
Dany Geraldo Kramer Cavalcanti e Silva ◽  
Maria Cleide de Araújo Lopes ◽  
Aldair de Souza Paiva ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Chronic Lymphocytic Leukemia ◽  
B Cell ◽  
Lymphoproliferative Disease ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
B Cell Malignancies ◽  
Prolymphocytic Leukemia ◽  
Chronic Lymphoproliferative Diseases ◽  
Cell Chronic Lymphocytic Leukemia

PURPOSE: CD5 is a T cell marker, aberrantly express in B cell chronic lymphocytic leukemia (B-CLL) and mantle cell lymphoma (MCL). Other chronic B cell malignancies including hairy cell leukemia (HCL) and B cell prolymphocytic leukemia (B-PLL) are CD5 negative or express this antigen in a weak way. In this study, CD5 expression was investigated in leukemic cells from 42 patients with chronic B cell lymphoproliferative disease. METHODS: We studied the CD5 expression in leukemic cells from 42 patients with chronic B-cell malignancies by flow cytometry. Demographic features such as age, sex and clinical date were also analyzed. RESULTS: There were 22 males and 20 females. The immunophenotyping showed that 35 cases were B-CLL, 3 B-PLL and HCL and one patient was MCL. CD5 expression was present in all B-CLL and MCL. Low expression of CD5 was observed in one patient with B-PLL and negative in all cases of HCL. CONCLUSION: Our date demonstrated that CD5 expression can help distinguish among B-CLL from HCL and B-PLL, but is similar expressed in MCL.

scholarly journals A two-color flow cytometry assay for detection of hairy cells using monoclonal antibodies

Blood ◽  
1987 ◽  
Vol 70 (4) ◽  
pp. 1063-1068
Author(s):  
JS Kristensen ◽  
J Ellegaard ◽  
P Hokland
Keyword(s):  
Flow Cytometry ◽  
Peripheral Blood ◽  
Mononuclear Cells ◽  
Cell Suspensions ◽  
Lymphocytic Leukemia ◽  
Myelogenous Leukemia ◽  
Morphological Evidence ◽  
Acute Leukemias ◽  
Color Flow ◽  
Hairy Cells

We have developed a simple two-color immunofluorescence assay equally suited for microscopy and flow cytometry detecting hairy cells (HCs) in single cell suspensions, based on the concomitant reactivities with the B cell-specific monoclonal antibody B1 (CD20) and the monocyte/HC- associated antibody SHCL-3 (CD11c). Thus, HCs can be demonstrated in peripheral blood, bone marrow, and spleen specimens from hairy cell leukemia (HCL) patients even when they constitute less than 1% of the cell suspension. Likewise, admixture experiments with normal mononuclear cells and the MOLT-4 T-acute lymphocytic leukemia (ALL) cell line demonstrated that HCs could be detected in amounts as low as 1%. The validity of this assay has been ascertained by the lack of double marker positivity in cell suspensions from B-chronic lymphocytic leukemia (CLL) and acute myelogenous leukemia (AML) patients that only expressed B1 or SHCL-3, respectively. Furthermore, other malignant blood diseases, including malignant lymphomas, acute leukemias, and chronic leukemias disclosed no double marker positive cells. In a clinical setting, this assay was used for purifying HCs (by flow cytometry) from the peripheral blood from patients with no apparent morphological evidence of circulating HC infiltration and for monitoring the effect of interferon therapy. In conclusion, this assay should be of value for both diagnosis and monitoring patients with HCL.

Detection of t(14;18)(q32;q21) in B-Cell Chronic Lymphocytic Leukemia

2005 ◽  
Vol 129 (3) ◽  
pp. 410-411
Author(s):  
Wolfgang Kern ◽  
Torsten Haferlach ◽  
Susanne Schnittger ◽  
Claudia Schoch
Keyword(s):  
Flow Cytometry ◽  
In Situ Hybridization ◽  
Chronic Lymphocytic Leukemia ◽  
Follicular Lymphoma ◽  
B Cell ◽  
Lymphocytic Leukemia ◽  
Multiparameter Flow Cytometry ◽  
Lymphoma Therapy ◽  
Cell Chronic Lymphocytic Leukemia

Abstract Cytomorphologic testing and multiparameter flow cytometry are the mainstays in diagnosing B-cell chronic lymphocytic leukemia, whereas fluorescence in situ hybridization that targets the translocation t(14;18)(q32;q21) often is used to identify follicular lymphoma. Therapy is highly diverse between both diseases. We describe a case with cytomorphologically and immunologically proven B-cell chronic lymphocytic leukemia in which t(14;18)(q32;q21) was found.

scholarly journals Prognostic significance of immunoglobulin phenotype in B cell chronic lymphocytic leukemia

Blood ◽  
1985 ◽  
Vol 65 (2) ◽  
pp. 340-344 ◽  
Author(s):  
L Baldini ◽  
R Mozzana ◽  
A Cortelezzi ◽  
A Neri ◽  
F Radaelli ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
B Cell ◽  
Clinical Stage ◽  
Prognostic Significance ◽  
Prognostic Index ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
Clinical Prognosis ◽  
Delta Type ◽  
Cell Chronic Lymphocytic Leukemia

Abstract Seventy-six consecutive untreated patients with B cell chronic lymphocytic leukemia (B-CLL) and classified according to Binet's staging system were studied at the clinical presentation. Several immunologic parameters (number of total and T circulating lymphocytes and their surface membrane immunoglobulin [Smlg] phenotypes and levels of serum Ig) were evaluated with the aim of identifying a biologic marker of prognostic relevance. In this series of persons, Binet staging confirmed its usefulness as a prognostic index (P less than .001). With regard to Smlg, they were mu-type in 41 cases (53.9%), mu- type plus delta-type in 29 cases (38.2%), alpha-type in one case, and not detectable in five cases. No correlations were found between clinical stage and immunoglobulin phenotype, although all but one patient in stage C showed mu-type Smlg alone. On analyzing the survival curves of our patients according to different Smlg phenotypes, we found that patients with only mu-type Smlg had a poorer prognosis (P less than .05) than those with mu-type plus delta-type; this difference was even more significant (P less than .01) in patients in stage A, whereas there were no statistical differences in those in stages B and C. Because the appearance of surface heavy chain of delta-type could be an expression of cell maturation, these results suggest that in B-CLL the presence of phenotypically more mature leukemic cells may correlate with better clinical prognosis, particularly in the early phase of the disease.

scholarly journals T cell chronic lymphocytic leukemia: presence in bone marrow and peripheral blood of cells that suppress erythropoiesis in vitro

Blood ◽  
1978 ◽  
Vol 52 (1) ◽  
pp. 255-260 ◽  
Author(s):  
R Hoffman ◽  
S Kopel ◽  
SD Hsu ◽  
N Dainiak ◽  
ED Zanjani
Keyword(s):  
Bone Marrow ◽  
T Cell ◽  
Chronic Lymphocytic Leukemia ◽  
T Lymphocytes ◽  
Peripheral Blood ◽  
Lymphocytic Leukemia ◽  
Transfusion Therapy ◽  
Cell Chronic Lymphocytic Leukemia ◽  
Marrow Cells

Abstract The pathogenesis of the anemia associated with malignancy was investigated in a patient with T cell chronic lymphocytic leukemia. The plasma clot culture system was used as a measure in vitro of erythropoiesis. The patient's peripheral blood and marrow T lymphocytes obtained both before and after transfusion therapy suppressed erythroid colony formation by normal human bone marrow cells. Pretreatment of the patient's bone marrow T cells by antithymocyte globulin (ATG) and complement reversed this suppression. In addition, pretreatment of the patient's marrow cells with ATG and complement markedly augmented erythropoiesis in vitro. The expression of erythroid activity caused by the selective destruction of the suppressor T lymphocytes in the patient's bone marrow with ATG and the suppression of normal erythropoiesis by the patient's bone marrow and peripheral blood lymphocytes suggest that interaction between the malignant T cell and the erythropoietin-responsive stem cell is important in production of anemia in this patient.

scholarly journals Battle of Thermopylae: 300 Spartans (natural killer cells plus obinutuzumab) versus the immortal warriors (chronic lymphocytic leukemia cells) of Xerxes’ army

2019 ◽  
Vol 5 (10) ◽  
pp. FSO425
Author(s):  
Ricardo García-Muñoz ◽  
María-Josefa Nájera ◽  
Jesús Feliu ◽  
Judith Antón-Remírez ◽  
Enrique Ramalle-Gómara ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
Nk Cells ◽  
Natural Killer ◽  
Peripheral Blood ◽  
Nk Cell ◽  
Killer Cell ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
Lymphokine Activated Killer Cells ◽  
Killer Cells

Aim: To analyze the effects of subcutaneous or intravenous rituximab + lymphokine-activated killer cells, obinutuzumab or ibrutinib on natural killer (NK) cell levels in chronic lymphocytic leukemia and follicular lymphoma patients. Patients & methods: The distribution of peripheral blood NK cells of 31 patients was analyzed by flow cytometry. Results: We detected a decrease of NK cells in peripheral blood below normal range after obinutuzumab treatment. During maintenance treatment with subcutaneous rituximab, an NK cell reduction was less pronounced than after intravenous rituximab treatment, despite lymphokine-activated killer cell infusions. Conclusion: After one dose of obinutuzumab, each NK cell in peripheral blood destroys 25 leukemic cells.

Sign in / Sign up

Export Citation Format

Share Document