Journal Detail Information

1

Cite

Share

Sodium valproate synergizes adriamycin to inhibit proliferation and induce apoptosis in myelodysplastic syndrome cell line.

Cheng YU ; Bao-An CHEN ; Chong GAO ; Jia-Hua DING ; Guo-Hua XIA ; Ze-Ye SHAO ; Feng GAO ; Yun-Yu SUN ; Jian CHENG ; Gang ZHAO ; Jun WANG ; Hui-Hui SONG ; Yan MA ; Wen BAO

Journal of Experimental Hematology.2008;16(3):555-560.

The aim of this study was to investigate the tumor suppression efficacy of a histone deacetylase inhibitor, sodium valproate combined with adriamycin in the treatment of myelodysplastic syndrome cell line MUTZ-1. After treated with different concentrations of sodium valproate alone, adriamycin alone or combination of them, growth curve of MUTZ-1 cell line were detected; growth of the tumor cells were analyzed by flow cytometry and morphology method. The results indicated that when the myelodysplastic syndrome cell line MUTZ-1 was treated with adriamycin (0.039 microg/ml, 0.078 microg/ml, 0.156 microg/ml, 0.312 microg/ml, 0.4 microg/ml), the tumor growth inhibition rates were 5.08 +/- 0.79%, 12.32 +/- 2.39%, 23.65 +/- 1.34%, 43.33 +/- 2.38% and 47.85 +/- 1.46% (p < 0.05), 0.25 mmol/L sodium valproate did not show apoptosis effect, but could synergize adriamycin to promote apoptosis. When the myelodysplastic syndrome cell line MUTZ-1 treated with two drug combination, the tumor growth inhibition rates were 23.46 +/- 1.12%, 49.87 +/- 0.84%, 52.37 +/- 1.05%, 78.43 +/- 4.34% and 82.47 +/- 1.04% (p < 0.05), and displayed concentration-dependent manner. All the data above were significantly different from those in control (p < 0.05). Sodium valproate showed obvious effect at concentration of 0.078 microg/ml adriamycin. After treated with 0.25 mmol/L sodium valproate and 0.078 microg/ml adriamycin for 72 hours, MUTZ-1 cell line showed typical apoptosis morphological character. It is concluded that sodium valproate may enhance the efficacy of adriamycin on MUTZ-1 cell line.
Apoptosis ; drug effects ; Cell Line, Tumor ; Cell Proliferation ; drug effects ; Doxorubicin ; pharmacology ; Drug Synergism ; Humans ; Myelodysplastic Syndromes ; pathology ; Valproic Acid ; pharmacology

2

Cite

Share

Distribution of abnormal cell clone with deletion of chromosome 20q in marrow cell lineages and apoptosis cells in myelodysplastic syndrome.

Ling QIN ; Chun WANG ; You-Wen QIN ; Kuang-Cheng XIE ; Shi-Ke YAN ; Yan-Rong GAO ; Xiao-Rui WANG ; Chu-Xian ZHAO

Journal of Experimental Hematology.2008;16(3):551-554.

This study was aimed to investigate the distribution of abnormal clone in marrow cell lineages and apoptosis cells in myelodysplastic syndrome (MDS) with deletion of chromosome 20q. Monoclonal antibodies recognizing myeloid precursors (CD15), erythroid precursors (GPA), T cells (CD3(+)CD56(-)CD16(-)), B cells (CD19), NK cells (CD3(-)CD56(+)CD16(+)) were used to sort bone marrow cells in a MDS patient with del (20q) by fluorescence activated cell sorting (FACS). Annexin V-FITC and PI were used to sort bone marrow Annexin V(+)PI(-) and Annexin V(-)PI(-) cells by FACS. The sorted positive cells were detected by interphase dual-color fluorescence in situ hybridization (D-FISH) using a LSI D20S108 probe (Spectrum Orange) and a Telvysion TM 20p probe (Spectrum Green). FACS and FISH analysis were also performed on the samples from 4 cases with normal karyotype. The results showed that the proportions of MDS clone in the myeloid and erythroid precursors were 70.50% and 93.33% respectively, in the RAEB-1 patient with del (20q) and were obviously higher than that in control group (5.39% and 6.17%). The proportions of abnormal clone in T, B and NK cells were 3.23%, 4.32% and 5.77% respectively and were less than that in control group (5.76%, 4.85%, 6.36%). The percentage of apoptotic cells in the bone marrow nucleated cells was 16.09%. The proportions of MDS clone in Annexin V(+)PI(-) and Annexin V(-)PI(-) cells were 32.48% and 70.11%, respectively. It is concluded that most myeloid and erythroid precursors are originated from the abnormal clone in MDS with del (20q). A little part of apoptotic cells are derived from the abnormal clone.
Apoptosis ; genetics ; Bone Marrow Cells ; metabolism ; pathology ; Cell Lineage ; genetics ; Chromosome Deletion ; Chromosomes, Human, Pair 20 ; Clone Cells ; metabolism ; pathology ; Humans ; Myelodysplastic Syndromes ; genetics ; pathology

3

Cite

Share

Clinical and prognostic analysis of 125 cases of non-Hodgkin's lymphoma.

Lin LIU ; Min ZHANG ; Ping ZOU

Journal of Experimental Hematology.2008;16(3):547-550.

This study was to investigate the predictive factors influencing prognosis of non-Hodgkin's lymphoma (NHL). The clinical data on 125 cases of NHL were analyzed retrospectively. The results indicated that in 125 cases, the incidence of B cell NHL (B-NHL) was 68%, T cell NHL (T-NHL) was 28%, and uncertained cases were 4%. B-NHL was with more bone marrow involvement, while T-NHL was associated with more presence of B symptom, increased lactate dehydrogenase (LDH), advanced clinical stage and higher International Prognostic Index (IPI) scores. For T-NHL and B-NHL, the 3-year overall survival (OS) rate was 41.07% and 71.64% respectively. Age, B symptom, LDH level, and clinical stage were associated with OS. Immunophenotyping was not identified as a significant prognostic factor. The incidence of born marrow involvement was 31.2%, mainly in B-NHL. The involvement manner had no relationships with age, B symptom, LDH level and T/B immunophenotyping. Diffuse bone marrow involvement was often linked with hepatosplenomegaly, and its OS was shorter than that focal manner. In conclusion, age, B symptom, LDH level and clinical stage affect NHL survival, while immunophenotyping was not an independent prognostic factor for NHL. The manner of bone marrow involvement helped to predict prognosis.
Adolescent ; Adult ; Aged ; Aged, 80 and over ; Bone Marrow ; pathology ; Child ; Child, Preschool ; China ; Female ; Humans ; Infant ; L-Lactate Dehydrogenase ; metabolism ; Lymphoma, B-Cell ; diagnosis ; Lymphoma, Non-Hodgkin ; diagnosis ; mortality ; pathology ; Lymphoma, T-Cell ; diagnosis ; enzymology ; Male ; Middle Aged ; Prognosis ; Retrospective Studies ; Survival Rate ; Young Adult

4

Cite

Share

Expression of ALK protein in large cell lymphoma with ALCL chromosome translocation in relation to prognosis.

Tian-Hai JI ; Hui-Ling LI ; Hui-Yong JIANG ; Tong ZHAO ; Ying-Hao YU

Journal of Experimental Hematology.2008;16(3):543-546.

The aim of this study was to investigate the expression of anaplastic lymphoma kinase (ALK) protein resulted from chromosome translocation in anaplastic large cell lymphoma (ALCL) and its relationship with the age and prognosis of patients with ALCL. The tissue microarray including 30 cases of ALCL and 2 normal control tissues were established, the expression of anaplastic lymphoma kinase (ALK) protein was detected by immunohistochemistry, the statistical analysis of detected results was carried out by SPSS software. The results showed that the ALK protein was expressed negatively in 2 cases of primary skin ALCL, but in 20 out of 28 cases of systematic ALCL the ALK protein was expressed positively and mainly located in cytoplasm and/or nucleus (71.4%). Clinically, the patients with ALK expression were younger than those without ALK expression (p < 0.05). The prognosis of patients with ALK expression was better than those without ALK expression (p < 0.05). It is concluded that there is a high incidence of ALK expression in ALCL, especially in younger group. ALK expression may be an useful and independent marker for the differential diagnosis and prognosis evaluation of ALCL.
Adolescent ; Adult ; Aged ; Aged, 80 and over ; Child ; Chromosomes, Human, Pair 1 ; Chromosomes, Human, Pair 2 ; Female ; Humans ; Lymphoma, Large-Cell, Anaplastic ; enzymology ; genetics ; Male ; Middle Aged ; Prognosis ; Protein-Tyrosine Kinases ; genetics ; metabolism ; Receptor Protein-Tyrosine Kinases ; Translocation, Genetic ; Young Adult

5

Cite

Share

Effects of thalidomide on CD4(+)CD25(+) T regulatory cells in patients with multiple myeloma.

Yun YANG ; Wang-Gang ZHANG ; Ai-Li HE ; Hui-Yun YANG ; Jian-Li WANG ; Wei TIAN

Journal of Experimental Hematology.2008;16(3):538-542.

The study was purposed to explore the changes of CD4(+)CD25(+) T regulatory cells in patients with multiple myeloma before and (MM) after treatment with thalidomide so as to provide evidences for effective immunotherapy. The population of CD3(+) T, CD4(+) T, CD8(+) T, NK and CD4(+)CD25(+) Treg in patients with MM were detected by flow cytometry. Statistical significance of differences in different groups was determined by using the t test. A p value of less than 0.05 was considered to be significant. The results showed that the percentage of CD4(+)CD25(+ high) T in patients with MM was significantly higher than that of the healthy donors (p > 0.01). The population of CD4(+)CD25(+ high) Treg cells in patients with response to thalidomide was significantly decreased (p < 0.01), but the population of these cells in patients without response not changed significantly (p > 0.05), as compared with patients before treatment. In 16 patients who achieved complete remission after chemotherapy, the population of CD4(+)CD25(+ high) T was 6.91 +/- 1.12%, which was slightly higher than that before treatment. The population of CD3(+) T, CD4(+) T, CD8(+) T, NK and CD4(+)CD25(+) Treg significantly increased in patients with positive response to thalidomide, but the population of CD8(+) T remained unchanged. It is concluded that the significant increase of CD4(+)CD25(+) regulatory T cells in peripheral blood of patients with MM is concerned with the MM pathogenesis; thalidomide may exert its anti-MM effects by down-regulating CD4(+)CD25(+) Treg.
Adult ; Aged ; Aged, 80 and over ; CD4-Positive T-Lymphocytes ; immunology ; CD8-Positive T-Lymphocytes ; immunology ; Female ; Humans ; Immunosuppressive Agents ; therapeutic use ; Killer Cells, Natural ; immunology ; Male ; Middle Aged ; Multiple Myeloma ; drug therapy ; immunology ; T-Lymphocyte Subsets ; immunology ; T-Lymphocytes, Regulatory ; drug effects ; immunology ; Thalidomide ; therapeutic use

6

Cite

Share

Proteasome inhibitor induces apoptosis and influences the expression of Notch1 and NF-kappaB in multiple myeloma RPMI8226 cells.

Hui WANG ; Xin LIU ; Bo XU

Journal of Experimental Hematology.2008;16(3):531-537.

The occurrence and development of Multiple myeloma (MM) are closely related to bone marrow microenvironment in which many signal pathways were involved. Notch signal plays an important role in regulating hematopoietic cells proliferation and differentiation in hemopoietic microenvironment, especially Notch1 has close touch with the occurrence and development of neoplastic hematologic disorders. MM deeply depends on NF-kappaB, and the latter has something to do with oncogenesis, metastasis, proliferation, apoptosis and drug resistance of tumor cells. NF-kappaB2 family has been confirmed as one of target genes of Notch signal. Bortezomib as representative of proteasome inhibitors has been licensed by FDA in treating refractory and relapsing MM, but the mechanism of bortezomib inducing cells apoptosis is not yet clear. This study was purposed to investigate the effects of bortezomib inducing cell apoptosis and influencing the erpression of Notch1 and NF-kappaB in MM RPMI 8226 cells. The effect of bortezomib on apoptosis of MM RPMI8226 cells was assayed by transmission electron microscopy, flow cytometry and TUNEL; the expressions of Notch 1 and NF-kappaB in apoptotic RPMI8226 cells were detected by RT-PCR and immunofluorescence cytochemical staining respectively. The results showed that Notch1 and NF-kappaB highly expressed in RPMI 8226 cells. With the increase of bortezomib concentration, the typical apoptosis features of RPMI8226 cells were observed, the expressions of Notch1 and the expression of NF-kappaB decreased in nuclei and increased in cytoplasm. These changes had significant difference from control after concentration of bortezomib was raised to a certain degree. It is concluded that Notch1 and NF-kappaB signaling pathways participate in bortezomib-inducing RPMI8226 cell apoptosis and there may be some correlation between the Notch 1 and NF-kappaB signaling pathways, indicating that Notch 1 signal may be a latent target in treating MM. This study provides a certain experimental basis for research and development of new drugs.
Apoptosis ; drug effects ; Boronic Acids ; pharmacology ; Bortezomib ; Humans ; Multiple Myeloma ; pathology ; NF-kappa B ; genetics ; metabolism ; Protease Inhibitors ; pharmacology ; Pyrazines ; pharmacology ; Receptor, Notch1 ; genetics ; metabolism ; Signal Transduction ; Tumor Cells, Cultured

7

Cite

Share

Effects of matrine on cgi-100 gene expression and proliferation in K562 cells.

Feng-Xia HUANG ; Yan ZHANG ; Wei-Jia WANG

Journal of Experimental Hematology.2008;16(3):525-530.

This study was aimed to explore the expression level of the unknown cgi-100 gene in human leukemia K562 cells treated with matrine, and to investigate effect of cgi-100 on proliferation of K562 cells. The expression level of cgi-100 was detected by RT-PCR in K562 cells before and after being treated with matrine; pIRES2-EGFP/cgi-100 eukaryotic expression vector was constructed by DNA recombinant technique and was introduced into K562 cells by liposome-mediated DNA transfection. The cgi-100 gene expression level, growth-curve, and cell cycle of the modified K562-cgi-100 cells were detected by RT-PCR, Trypan blue staining and FCM. Morphological changes were observed under the optical and electron microscopes. The results indicated that the expression level of cgi-100 decreased in K562 cells treated with matrine. Heterochromatin decreased, euchromatin and the proportion of S phase in K562-cgi-100 cells increased, and cell proliferation enhanced. It is concluded that the expression of cgi-100 mRNA decreased in a dose- and time-dependent manner in the K562 cells treated with matrine and over-expression of cgi-100 elevates the proliferation and the immaturity level of K562-cgi-100 cells.
Alkaloids ; pharmacology ; Antineoplastic Agents, Phytogenic ; pharmacology ; Cell Proliferation ; drug effects ; Gene Expression Regulation, Neoplastic ; Genes, Neoplasm ; genetics ; physiology ; Humans ; K562 Cells ; Proto-Oncogene Proteins ; genetics ; metabolism ; Quinolizines ; pharmacology

8

Cite

Share

Gamma-globin synthesis in K562 cells induced with Tortois plastron, Astragali, Salviae miltiorrhizae and Codonopsis pilosulae.

Zhi-Mei GUO ; Hai-Jun LI ; Xin-Hua QIAN

Journal of Experimental Hematology.2008;16(3):520-524.

This study was purposed to investigate the effects of tortois plastron, astragali, salviae miltiorrhizae and codonopsis pilosulae on gamma-globin gene synthesis in K562 cells in vitro. Benzidine staining was used to clarify the dose-and time-dependent effects of tortois plastron, astragali, salviae miltiorrhizae and codonopsis pilosulae on hemoglobin synthesis in K562 cells and Western blotting was performed to determine the level of hemoglobin F (alpha(2)gamma(2)). The results indicated that the K562 cells treated with 4 kinds of traditional Chinese medicine had different stain rates of benzidine for: 23.5% (tortois plastron), 19.8% (astragali), 15.8% (salviae miltiorrhizae) and 14.5% (codonopsis pilosulae) at 6 days after the treatment. Western blot indicated that synthesis of HbF increased. It is concluded that tortois plastron, astragali, salviae miltiorrhizae and codonopsis pilosulae enhance globins-gamma synthesis level and increase hemoglobin F level in K562 cells, the effect of which resembles that of sodium butyrate.
Animals ; Astragalus membranaceus ; chemistry ; Codonopsis ; chemistry ; Drugs, Chinese Herbal ; pharmacology ; Female ; Humans ; K562 Cells ; Male ; Materia Medica ; pharmacology ; Rats ; Rats, Sprague-Dawley ; Salvia miltiorrhiza ; chemistry ; gamma-Globins ; biosynthesis

9

Cite

Share

Apoptosis of K562 cells induced by extract of Agkistrodon Halys' venom.

Guo-Guang WANG ; Min XU ; Hai-Feng DUAN ; Gen-Bao ZHANG

Journal of Experimental Hematology.2008;16(3):516-519.

The study was purposed to investigate the effect of extract of Agkistrodon Halys venom on proliferation and apoptosis of K562 cells. The inhibition of K562 cell proliferation was measured by MTT assay; The morphologic changes of K562 cells was observed by microscopy; the apoptosis of K562 cells was measured by flow cytometry; the activity of extracellular signal-regulated kinase (ERK) in K562 cells was detected by Western blot. The results showed that when K562 cells were treated with 0, 1, 10, 20 microg/ml of the extraction for 48 hours, the apoptosis rates were 2.1%, 21.3%, 49.7%, 70.1%, respectively. The proliferation of K562 cells was obviously inhibited in dose-dependent manner. Typical morphologic changes significantly appeared in the extract-treated K562 cells. The extract obviously inhibited the activity of ERK in K562 cells. It is concluded that the extract of Agkistrodon Halys' venom can inhibit the proliferation of K562 cells and induce apoptosis of K562 cells.
Agkistrodon ; Animals ; Apoptosis ; drug effects ; Cell Proliferation ; drug effects ; Complex Mixtures ; pharmacology ; Crotalid Venoms ; chemistry ; Extracellular Signal-Regulated MAP Kinases ; metabolism ; Humans ; K562 Cells

10

Cite

Share

Combined effect of TNF-related apoptosis induced ligand and Ara-C in inducing apoptosis of HL-60 cells and its mechanism.

Jia RAO ; Rong-Yan ZHANG ; Yan CHEN ; Guo-An CHEN ; Cheng-Jing XIAO

Journal of Experimental Hematology.2008;16(3):510-515.

To investigate the combined effect of human recombinant soluble TNF-related apoptosis induced ligand (hrsTRAIL) with Ara-C or alone on HL-60 leukemia cell lines and its mechanism, human leukemia cell lines HL-60 were cultured in vitro. HL-60 cells were divided into 5 groups: control group, Ara-C group, rsTRAIL group, Ara-C + rsTRAIL simultaneously given group, Ara-C + rsTRAIL tandem given group (Ara-C followed by rsTRAIL group). The cytotoxic effect was measured by MTT assay; cell apoptosis rate was determined by flow cytometry after Annexin V/PI staining; the expression level of DR5 on surface of HL-60 cells treated with Ara-C at different concentrations for 24 hours was determined by flow cytometry. The expression level of DR5 on surface of HL-60 cells and caspase-8 activity in HL-60 cells of rsTRAIL group and Ara-C + rsTRAIL tandem group was determined by flow cytometry. The result showed that rsTRAIL could inhibit the proliferation of HL-60 cells and induce apoptosis of HL-60 cells in a concentration-dependent manner. The apoptosis rate of HL-60 cells in Ara-C + rsTRAIL tandem given group was higher than that in Ara-C + rsTRAIL simultaneously given group, the expression level of DR5 on surface of HL-60 cells and intracellular activity of caspase-8 in Ara-C + rsTRAIL tandem given group were higher than those in rsTRAIL group. When HL-60 cells treated with 5 and 10 mg/L of Ara-C for 24 hours, the expression level of DR5 on surface of HL-60 cells was higher than that in control group. It is concluded that rsTRAIL can inhibit the proliferation of HL-60 cells, and induce apoptosis of HL-60 cells. Ara-C can upregulate DR5 expression on the surface of HL-60 cells and enhance the effect of rsTRAIL-inducing apoptosis. Tandem treatment of HL-60 cells with Ara-C followed by rsTRAIL induce more apoptosis than that of co-treatment with rsTRAIL and Ara-C. Ara-C and rsTRAIL has a synergistic inhibitory effect on growth of HL-60 cells. The mechanism may correlate with up-regulation of the expression level of DR5 and/or caspase-8 in HL-60 cells by Ara-C.
Apoptosis ; drug effects ; Caspase 8 ; genetics ; metabolism ; Cell Proliferation ; drug effects ; Cytarabine ; pharmacology ; Dose-Response Relationship, Drug ; Drug Synergism ; HL-60 Cells ; Humans ; Receptors, TNF-Related Apoptosis-Inducing Ligand ; genetics ; metabolism ; Recombinant Proteins ; pharmacology ; TNF-Related Apoptosis-Inducing Ligand ; pharmacology ; Up-Regulation

DISPLAY OPTIONS

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share