• Title/Summary/Keyword: human T-cell leukemia

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Plasma Soluble CD30 as a Possible Marker of Adult T-cell Leukemia in HTLV-1 Carriers: a Nested Case-Control Study

  • Takemoto, Shigeki;Iwanaga, Masako;Sagara, Yasuko;Watanabe, Toshiki
    • Asian Pacific Journal of Cancer Prevention
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    • v.16 no.18
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    • pp.8253-8258
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    • 2016
  • Elevated levels of soluble CD30 (sCD30) are linked with various T-cell neoplasms. However, the relationship between sCD30 levels and the development of adult T-cell leukemia (ATL) in human T-cell leukemia virus type 1 (HTLV-1) carriers remains to be clarified. We here investigated whether plasma sCD30 is associated with risk of ATL in a nested case-control study within a cohort of HTLV-1 carriers. We compared sCD30 levels between 11 cases (i.e., HTLV-1 carriers who later progressed to ATL) and 22 age-, sex- and institution-matched control HTLV-1 carriers (i.e., those with no progression). The sCD30 concentration at baseline was significantly higher in cases than in controls (median 65.8, range 27.2-134.5 U/mL vs. median 22.2, range 8.4-63.1 U/mL, P=0.001). In the univariate logistic regression analysis, a higher sCD30 (${\geq}30.2U/mL$) was significantly associated with ATL development (odds ratio 7.88 and the 95% confidence intervals 1.35-45.8, P = 0.02). Among cases, sCD30 concentration tended to increase at the time of diagnosis of aggressive-type ATL, but the concentration was stable in those developing the smoldering-type. This suggests that sCD30 may serve as a predictive marker for the onset of aggressive-type ATL in HTLV-1 carriers.

Studies on Production of Monoclonal Antibodies Reactive with T-Cell Leukemia (인형 T세포 백혈병에 대한 단세포군 항체 생산에 관한 연구)

  • 서병석;김원배;최응칠;김병각
    • YAKHAK HOEJI
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    • v.31 no.5
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    • pp.253-265
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    • 1987
  • To develop hybridomas secreting monoclonal antibodies to be used as unlimited sources of reagents indispensable for the diagnosis and treatement of leukemic malignancy, a monoclonal antibody was generated to human pre-T leukemia cells (Jurkat). Hybridomas were produced against Jurkat cell line by fusing spleen cells from hyperimmunized mice with murine plasmacytoma cells (P3$\times$63Ag8. V653). One monoclonal antibody derived from this fusion, designated DMJ-2 was reactive with T-cell lines (Jurkat, Molt-4 and RPMI-8402) and normal peripheral E-rosette forming T cells, but unreactive with B-cell lines (Daudi, Nalm-6) and non-T, non-B cell line (K562). Conclusively DMJ-2 reactive with mature and immature T-lineage lymphoid cells.

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Expression and Characterization of Human T-Cell Leukemia Virus Type-I Env and Gag Proteins

  • Son, Kyung-Hwa;Kim, Byong-Moon;Lee, Taik-You;Kim, Seong-Ryong;Kim, Kun-Soo;Lee, Jeong-Kug;Yang, Jai-Myung
    • Journal of Microbiology and Biotechnology
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    • v.9 no.3
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    • pp.311-317
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    • 1999
  • Human T-cell leukemia virus Type-I (HTLV-I) is etiologically associated with rare adult T-cell leukemia, a malignant T-cell disorder. cDNAs encoding p24 (gag), gp21(env), and pXII of HTLV-I were amplified by polymerase chain reaction (PCR) using the genomic DNA extracted from HUT102 cell line as a template. The amplified cDNAs were cloned into the Escherichia coli expression vectors and over-expression of the recombinant proteins were achieved by adding IPTG into the culture media in order to induce the promoter. The molecular weights of the recombinant p24, gp21, and pXII, determined by SDS-PAGE, were found to be approximately 28 kDa, 23 kDa, and 15 kDa, respectively. Reactivity of the recombinant proteins with human sera was tested by the immunoblot assay. The gp21 and p24 reacted against the sera obtained from HTLV-I-infected individuals but not against the sera obtained from normal persons. These results suggest that the recombinant proteins expressed in E. coli were recognized by antibodies in sera from HTLV-I infected patients. These recombinant proteins would be applicable for detecting the presence of antibodies against HTLV-I in human blood samples.

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Effects of Continentalic from Aralia Continentalis on Growth Inhibition and Apoptosis Induction in Human Leukemia HL-60 Cells (독활 유래 Continentalic Acid가 인간 백혈병 HL-60 세포의 성장억제와 아포토시스 유도에 미치는 영향)

  • Kim, Sun-Young;Jeong, Seung-Il;Kim, Sung-Zoo;Shim, Jae-Suk;Jang, Seon-Il
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.23 no.6
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    • pp.1314-1319
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    • 2009
  • In previous study, we have shown that continentalic acid (CA) isolated from Aralia continentalis induced the growth inhibition and apoptosis in HepG2 cells. In this study, we examine the effects of CA from A. continentalis on growth inhibition and apoptosis induction in human leukemia HL-60 and mouse fibroblast NIH 3T3 cell lines. The results demonstrated that CA decreased cell growth of leukemia HL-60 cells but not human HaCaT keratinocytes, assessed with the MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide] and LDH (lactate dehydrogenase) assay. Flow cytometric analysis of mouse fibroblast cell lines exposed to CA showed that apoptotic cells increased in a time- and dose-dependent manner. Treatment with CA decreased the number of normal cells and increased the number of early apoptotic and late apoptotic cells in a dose-dependent manner. The induction of apoptosis in mouse cell lines by CA was mediated through the activation of caspase-3, Bak, and Bax and the down-regulation of Bcl-2. Our results suggest that CA efficiently induces apoptosis in human leukemia cells.

CopA3 peptide from Copris tripartitus induces apoptosis in human leukemia cells via a caspase-independent pathway

  • Kang, Bo-Ram;Kim, Ho;Nam, Sung-Hee;Yun, Eun-Young;Kim, Seong-Ryul;Ahn, Mi-Young;Chang, Jong-Soo;Hwang, Jae-Sam
    • BMB Reports
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    • v.45 no.2
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    • pp.85-90
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    • 2012
  • Our previous study demonstrated that CopA3, a disulfide dimer of the coprisin peptide analogue (LLCIALRKK), has antibacterial activity. In this study, we assessed whether CopA3 caused cellular toxicity in various mammalian cell lines. CopA3 selectively caused a marked decrease in cell viability in Jurkat T, U937, and AML-2 cells (human leukemia cells), but was not cytotoxic to Caki or Hela cells. Fragmentation of DNA, a marker of apoptosis, was also confirmed in the leukemia cell lines, but not in the other cells. CopA3-induced apoptosis in leukemia cells was mediated by apoptosis inducing factor (AIF), indicating induction of a caspase-independent signaling pathway.

Inhibition by Imatinib of Expression of O-glycan-related Glycosyltransferases and Tumor-associated Carbohydrate Antigens in the K562 Human Leukemia Cell Line

  • Sun, Qi-Chang;Liu, Mi-Bo;Shen, Hong-Jie;Jiang, Zhi;Xu, Lan;Gao, Li-Ping;Ni, Jian-Long;Wu, Shi-Liang
    • Asian Pacific Journal of Cancer Prevention
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    • v.14 no.4
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    • pp.2447-2451
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    • 2013
  • Objective: To study changes of tumor associated carbohydrate antigen (TACAs) expression and mRNA levels for tumor associated glycosyltransferases, and assess subcellular localizations of N-acetyl galactosyltransferases (GalNAc-Ts) in the K562 leukemia cell line after imatinib treatment. Methods: RT-PCR was performed to analyze the expression of glycosyltransferases which synthesize O-glycan in tumor-associated carbohydrate antigens (TCTAs). The expression of Tn antigen, T antigen and sialyl T antigen on K562 cell membranes was measured by flow cytometry after treatment with different concentrations of imatinib. Co-localization of GalNAc-Ts and ER (endoplasmic reticulum) was determined by confocal laser scanning microcopy. Results: Transcript expression levels of several glycosyltransferases related to TCTAs were decreased after imatinib ($0-0.3{\mu}M$) treatment. Expression of Tn antigen and T antigen was increased while that of sialyl T antigen was decreased. Co-localization of GalNAc-Ts and ER was reduced by $0.2{\mu}M$ of imatinib. Conclusion: Imatinib inhibited the expression of O-glycan related TACAs and several related glycosyltransferases, while decreasing the co-localization of GalNAc-Ts and ER and normalizing O-glycosylation in the K562 human leukemia cell.

Antitumor Activity of Pedunculagin, one of the Ellagitannin

  • Chang, Jee-Hun;Cho, Jang -Hyun;Kim, Ha -Hyung;Lee, Kwang-Pyo;Lee, Min -Won;Han, Seong -Sun
    • Archives of Pharmacal Research
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    • v.18 no.6
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    • pp.396-401
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    • 1995
  • As a part of trials to develop the antitumor agent from tannins isolated from plants, the antitumor activity of peduculagin, an ellagitannin, isolated from Alnus hirsuta var. microphylla was examined in vitro and in vivo. In vitro, the cytotoxicity was determined by 0.4% typanblue dye exclusion method. peduculagin showed the dose-dependent cytotoxicity against human chronic myelogenous leukemia (K-562), human promyelocytic leukemia (HL-60), mouse lymphoid neoplasm (P388), mouse lymphocytic leukemia (L1210) and mouse sarcoma 180(S180) cell lines. $ED_{50}\; values\; (ED_{50})$ of each cell line were 5.30, 0.92, 2.78, 9.35 and $1.38 \mug/ml$ respectively. The most sensitive cell line was HL-60. In vivo, pedunculagin was administered to ICR mouse with the doses of 50 and $100{\;}{\mu}g/ml$intraperitoneally once at 20 days before S180 inoculation. peduculagin showed the antitumor activity and its T/C ratio (%) was 120.82% in the group of both concentrations.

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Inhibitive Effects of Meju Extracts Made with a Single Inoculum of the Fungi Isolated from the Traditional Meju on the Human Leukemia Cell Line (전통 메주에서 분리된 단독균으로 제조한 메주추출물의 혈액암세포에 대한 저해효과)

  • Han, Jung;Kim, Hyun-Jeong;Lee, Sang-Sun;Lee, In-Seon
    • The Korean Journal of Mycology
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    • v.27 no.4 s.91
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    • pp.312-317
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    • 1999
  • In order to study the antitumoral effect of meju extracts, which was made with a single inoculum of the microorganism, the cytotoxicity effects on several human leukemia cells such as promyelocytic leukemia cell (HL60), histiocytic lymphoma cell (U937) and acute T-cell leukemia Jurkat cell, and lymphocyte were analyzed by MTT assay. Twenty one microbes, mainly fungal genera, were isolated from Korean traditional mejus of different regions. From those collected isolates, meju was manufactured and extracted with 80% methanol, respectively. Meju methanol extracts exhibited low activites in cytotoxicity tests on HL60 cell, but high antitumoral effects of meju methanol extracts were shown on U937 and Jurkat cells. Meju methanol extracts made with a genera of Mucor, Absidia and Aspergillus showed prominant cytotoxic activities, especially. However all these extracts had no inhibitory effects on the cell growth of lymphocyte under the same conditions.

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Comparative susceptibility of different cell lines for culture of Toxoplasma gondii in vitro (톡소플라스마 곤디의 세포내 배양에 있어서 세포 주에 따른 감수성 비교)

  • 박병규;문형로
    • Parasites, Hosts and Diseases
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    • v.31 no.3
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    • pp.215-222
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    • 1993
  • In order to establish a useful cell culture system for T gondii we compared the degree of proliferation of T gondii tachyzoites among 8 different cell lines: 2 kinds of normal animal cells (MDCK-canine kidney cells; Vero-monkey kidney cells) and 6 kinds of human tumor cells (A 549, PC 14-lung cancer cells; SNU 1, SNU 16. Mlm 45-stomach cancer cells; HL-60-promyelocytic leukemia cells), through morphological observation and 3H-uracil uptake assay. The degree of susceptibility to infection with T gondii tachyzoites was highest in A 549 and PC 14 cells, medium in Vero, HL-60, MDCK and SNU 1, and lowest in SNU 16 and MBm 45 cells. The kinetics of T gondii multiplication during the post-Infection 60 hours were higllly dependent upon the dose of tachyzoites administered and the duration among the 8 tested fur the growth and multiplication of T gondii in vitro.

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