[In vitro effects of mesenchymal stem cells on secreting function of T lymphocytes and CD4⁺CD25⁺ T cells from patients with immune thrombocytopenia].

Objective: To analyze in vitro the effect of mesenchymal stem cells (MSCs) on secreting cytokines by T lymphocytes and ratio of CD4⁺CD25⁺ T cells from patients with immune thrombocytopenia (ITP).

Methods: Human bone marrow-derived MSCs were isolated by Ficoll Hypaque and cultured for proliferating to passage cells. Allogeneic T lymphocytes of health adults and ITP patients were isolated from peripheral blood by Ficoll Hypaque and nylon cotton column, and the ratio of CD4⁺CD25⁺ T cells was detected by flow cytometry.

[Clinical characteristics and efficacy analysis for patients over 55 years of age with acute lymphoblastic leukemia].

Objective: We investigated the clinical characteristics and therapeutic of elderly patients (≥55) with acute lymphoblastic leukemia (ALL).

Methods: From Jenuary 2000 to July 2012, 45 elderly patients (≥55) were enrolled in the study. Patients assighed into CVDP VDP/VP induction chemotherapy based on organ function.

Which method better evaluates the molecular response in newly diagnosed chronic phase chronic myeloid leukemia patients with imatinib treatment, BCR-ABL(IS) or log reduction from the baseline level?

The molecular response of chronic myeloid leukemia (CML) patients to tyrosine kinase inhibitor treatment can be evaluated either by BCR-ABL mRNA levels on international scale (IS) or by log reduction from the baseline level of the laboratory. Both methods were compared in 248 newly diagnosed chronic phase CML patients treated with imatinib. The major molecular responses (MMR) obtained by both methods predict progression-free survival (PFS, all P<0.

[Clinical characteristics of splenic marginal zone lymphoma with abnormal complete blood count].

The aim of this study was to investigate the clinical and laboratorial characteristics of splenic marginal zone lymphoma (SMZL) with an abnormal complete blood count (CBC). Data of 19 newly diagnosed SMZL patients with abnormal CBC were analyzed retrospectively. Seven patients were diagnosed by using splenic histology, 12 patients who did not undergo splenectomy were diagnosed on the basis of typical clinical presentation and cytologic, immunophenotypic and histologic characteristics of peripheral blood and bone marrow, according to SBLG guidelines.

[The efficacy and safety of autologous cryopreserved platelet transfusion in management of thrombocytopenia after chemotherapy in hematological malignancy].

Objective: To investigate the efficacy and safety of autologous cryopreserved platelet transfusion in the management of thrombocytopenia after chemotherapy in hematological malignancy.

Methods: A total of 40 patients diagnosed as hematological malignancy with complete remission were equally assigned into study group and control group. During chemotherapy interval in the study group, when platelet counts exceeded 120 × 10(9)/L, autologous platelets were collected with CS3000 Cell Separator and cryopreserved at -80°C with 5% dimethylsulfoxide.

[Effect of different regimens on bone disease of multiple myeloma].

Objective: To explore the difference of effects of two regimens (bortezomib and dexamethasone, BD; and thalidomide and dexamethasone, TD) on bone disease in multiple myeloma (MM).

Methods: Forty patients with newly diagnosed and refractory or relapsed MM were treated with BD or TD regimens from Dec 2006 to Sep 2008. Bone pain score and X-ray examination were carried out before and after therapy.

[The clinical characteristics of newly diagnosed acute myeloid leukemia patients with NPM1 mutation].

Objective: To investigate the clinical characteristics of newly diagnosed acute myeloid leukemia (AML) with NPM1 mutation.

Methods: NPM1 mutation (including A, B, D mutation type) was detected in 206 patients with newly diagnosed AML by real-time quantitative RT-PCR.

Results: The incidence of NPM1 mutation was 15.

[Abnormal expression of programmed cell death 5 gene in multiple myeloma patients].

The aim of this study was to investigate the gene expression of programmed cell death 5 (pdcd5) in plasma and bone marrow cells from patients with multiple myeloma (MM). Enzyme liked immunosorbent assay (ELISA) and real-time quantitative reverse transcription polymerase chain reaction (RQ-RT-PCR) were used to examine pdcd5 gene expression in plasma and marrow cells in 45 MM patients and 20 normal controls. The results showed that serum levels of PDCD5 protein in 45 MM patients were lower significantly compared with the normal controls and 20 responsive patients after chemotherapy, their plasma levels were (16.

Arsenic trioxide downregulates the expression of annexin II in bone marrow cells from patients with acute myelogenous leukemia.

Background: Most patients with acute myelogenous leukemia (AML) suffer from disordered hemostasis. We have previously shown that annexin II (Ann II), a high-affinity co-receptor for plasminogen/tissue plasminogen activator, plays a central role in primary hyperfibrinolysis in patients with acute promyelocytic leukemia (APL). The expression of Ann II in cells from patients with major subtypes of AML and the effect of arsenic trioxide (As2O3) on Ann II expression in AML cells were investigated to determine whether As2O3-mediated downregulation of Ann II could restore hemostatic stability.

[Candida colonization and invasive fungal infection in hospitalized patients with hematological malignancies].

Objective: To investigate thee status of Candida colonization and the risk factors of invasive fungal infection (IFI) in hospitalized patients with hematological malignancies.

Methods: 114 patients with hematological malignancies admitted to the hematology wards from May 2004 to April 2005 underwent fungal culture of their samples of urine, feces, and saliva once a week until the end of the sixth week of hospitalization or they were discharged. Culture of blood, sputum, or sterile body fluids were carried out when the patients were suspected to have IFI.

[Effect of additional chromosome abnormalities on the outcome of newly diagnosed acute promyelocytic leukemia treated with red arsenic sulfide and all trans-retinoic acid plus anthracyclin based protocol].

Objective: To analyze the effect of additional chromosome abnormalities on the prognosis and the clinical manifestations of acute promyelocytic leukemia (APL) and the reaction of the patients with additional chromosomes to the treatment of combination of red arsenic sulfide, all trans-retinoic acid (ATRA) and anthracyclin.

Methods: The clinical data of 158 patients with newly diagnosed APL who were treated with combination of red arsenic sulfide, ATRA, and anthracyclin were analyzed retrospectively.

Results: The frequency of additional chromosome abnormalities in the APL patients was 18.

[Effects of bortezomib at different doses in combination with dexamethasone in treatment of relapsed or refractory multiple myeloma: a comparative study].

Objective: To investigate the efficacy and toxicity of bortezomib of different doses in combination with dexamethasone for the treatment of relapsed or refractory multiple myeloma (MM).

Methods: 23 patients with relapsed or refractory MM, 10 males and 13 females, aged 65 (42-86), were randomized to 2 groups: low dose group receiving intravenous 1.0 mg/m2 bortezomib (n=10) on days 1, 4, 6, and 11 (twice weekly) combined with dexamethasone 20 mg/d on days 1-4, with 3 weeks as a course of treatment, and (20 standard dose group: receiving intravenous 1.

[PRAME mRNA expression in newly diagnosed acute myeloid leukemia patients and its application to monitoring minimal residual disease].

Objective: To investigate the expression level of preferentially expressed antigen of melanoma (PRAME) mRNA in newly diagnosed acute myeloid leukemia (AML) patients and evaluate its usefulness for detecting minimal residual disease (MRD).

Methods: PRAME mRNA levels were detected in bone marrow samples from 142 newly diagnosed AML patients (72 of them didn't express any specific fusion gene) by TaqMan based real-time quantitative PCR methods, and were serially monitored in 60 bone marrow samples from 9 follow-up patients (2 of them without specific fusion gene), including 3 in continuous complete remission, 6 in hematological relapse. Bone marrow samples from 22 bone marrow donors (NBM) were served as normal controls.

Expression patterns of WT1 and PRAME in acute myeloid leukemia patients and their usefulness for monitoring minimal residual disease.

Both WT1 and PRAME are highly expressed in acute myeloid leukemia (AML) patients. To assess the efficacy of their simultaneous detection for the purpose of monitoring minimal residual disease (MRD), we used real-time quantitative RT-PCR to quantify both WT1 and PRAME transcript levels in the bone marrow of 204 newly diagnosed AML patients, and 21 patients were serially monitored for a median of 11 months. The 22 normal bone marrow samples which served as controls collectively expressed low levels of WT1 and PRAME.

[Studies of treatment strategy and prognosis on acute myeloid leukemia with chromosome 8 and 21 translocation].

Objective: To investigate the relationship between the biological features and the treatment efficacy and prognosis in acute myeloid leukemia subtype M2 (AML-M2) patients with chromosome 8 and 21 translocation.

Methods: By using Cox regression model and Kaplan-Meier analyses, prognostic factors in 54 cases of de novo adult AML with t(8;21) in our institute from 1990 to 2003 were retrospectively analyzed.

Result: The complete remission (CR) rates were 81.

Characteristics and prognostic factors of acute myeloid leukemia with t (8; 21) (q22; q22).

The translocation t (8; 21) (q22; q22) frequently associated with additional chromosomal aberrations is one of the most recurrent chromosomal abnormalities in AML. Clinically, this type of AML usually shows some specific characteristics and has a good response to chemotherapy with a high remission rate and a relatively long median survival. On the other hand, some reports also showed poor prognosis in AML patients with t (8; 21), and the associated bad-prognosis factors have not been strongly established to date.

[Treatment of refractory and relapsed acute lymphocytic leukemia in adults].

Objective: To analyze on the efficacy and toxicity of fludarabine and teniposide + mitoxantrone (MIT) regimens on treating refractory and relapsed acute lymphocytic leukemia in adult patients.

Methods: Teniposide 100 mg/d, 5-7 d, MIT 10 mg/d, 2 d and fludarabine regimens [Flu 30 mg/(m(2) . d), 3- 5 d, Cytarabine (Ara-c )1-2 g/(m(2) .

[Analysis of characteristics of 72 cases of t(8;21) acute myeloid leukemia].

Objective: To investigate the laboratorial and clinical characteristics of t(8;21) AML, and to compare the differences between patients with additional chromosomal abnormalities and those without additional aberrations.

Methods: Seventy-two cases of t(8;21) AML were analyzed retrospectively, including features of morphology, initial blood cells, cytogenetic G-banding karyotype, immunophenotype, AML1/ETO fusion gene and clinical outcome. In order to compare the characteristics of patients with additional chromosomal abnormalities with those with t(8;21) alone, these patients were divided into two groups according to their karyotype as follows: Group A included patients with t(8;21) alone; Group B included patients with additional aberrations.

[Clinical study of Philadelphia chromosome-positive acute lymphoblastic leukemia].

Objective: To study the clinical characteristics and therapeutic outcome of Ph+ acute lymphoblastic leukemia (ALL).

Methods: Thirty previously untreated cases of Ph+ B-ALL were diagnosed in our institute. The patients were treated with combination chemotherapy of CODP +/- L regimen, Imatinib (400 approximately 600 mg/d) was continuously given to those who couldn't reach CR.

[MICM classification and prognostic analysis of 80 adolescents with acute lymphoblastic leukemia].

Objectives: To explore MICM classification and adverse prognostic factors in adolescents with acute lymphoblastic leukemia (ALL).

Methods: The MICM classification, clinical characteristics of 80 adolescents with ALL admitted to our hospital from January 1998 to December 2002 were retrospectively analyzed. Survival data were estimated by the Kaplan-Meier method and the prognostic factors were analyzed with the COX regression model.

[Effect of the tetra-arsenic tetra-sulfide (As4S4) on the corrected QT interval in the treatment of acute promyelocytic leukemia].

Objective: To evaluate the effect of tetra-arsenic tetra-sulfide (As4S4) therapy on the corrected QT interval (QTc) in the acute promyelocytic leukemia (APL) patients.

Methods: Ninety cases of APL treated with As4S4 were divided into two groups--the remission induction group and maintenance therapy group. Blood arsenic concentration was measured and a 12-lead electrocardiogram (ECG) was simultaneously performed before treatment and after remission in the induction group, and before and 2, 4, 6, 8, 10 courses after the treatment in the maintenance therapy group.

[Expression of cytidine deaminase mRNA in bone marrow cells from patients with acute leukemia].

The aim of the study was to determine the expression of cytidine deaminase (CDD) gene in bone marrow cells from patients with acute leukemia (AL) and evaluate the relationship between CDD expression and clinical feature. Semi-quantitative reverse transcription polymerase chain reaction (RT-PCR) was used for detection of expression level of CDD mRNA in bone marrow cells from 83 patients with acute leukemia and from 15 healthy peoples as control. CDD/beta-actin ratio >or= 0.