Brevinin-2R(1) semi-selectively kills cancer cells by a distinct mechanism, which involves the lysosomal-mitochondrial death pathway.

Brevinin-2R(1) semi-selectively kills cancer cells by a distinct mechanism, which involves the lysosomal-mitochondrial death pathway.
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DOI:
10.1111/j.1582-4934.2008.00129.x
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发表时间:
2008-06
影响因子:
5.3
通讯作者:
Los M
Los M
中科院分区:
医学2区
文献类型:
--
作者:
Ghavami S;Asoodeh A;Klonisch T;Halayko AJ;Kadkhoda K;Kroczak TJ;Gibson SB;Booy EP;Naderi-Manesh H;Los M

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布雷维宁 - 2R是一种新型的非溶血性防御素,从湖蛙的皮肤中分离出来。与包括外周血单核细胞(PBMC)、T细胞和人肺成纤维细胞在内的原代细胞相比,它对恶性细胞表现出优先的细胞毒性,这些恶性细胞包括Jurkat(T细胞白血病)、BJAB(B细胞淋巴瘤)、HT29/219、SW742(结肠癌)、L929(纤维肉瘤)、MCF - 7(乳腺腺癌)、A549(肺癌)。过表达Bcl2的Jurkat和MCF - 7细胞,以及过表达促凋亡BNIP3的显性负突变体(ΔTM - BNIP3)的L929和MCF - 7细胞对布雷维宁 - 2R处理具有很强的抗性。线粒体膜电位(ΔΨm)降低或细胞总ATP水平降低,以及活性氧物质(ROS)产生增加,但半胱天冬酶激活或凋亡诱导因子(AIF)或内切核酸酶G(Endo G)的释放未增加,是布雷维宁 - 2R引发死亡的早期指标。布雷维宁 - 2R与早期和晚期内体都相互作用。溶酶体膜通透性抑制剂以及组织蛋白酶 - B和组织蛋白酶 - L的抑制剂可阻止布雷维宁 - 2R诱导的细胞死亡。在布雷维宁 - 2R处理后可检测到自噬体。我们的结果表明,布雷维宁 - 2R激活溶酶体 - 线粒体死亡途径,并涉及类自噬细胞死亡。
Brevinin-2R is a novel non-hemolytic defensin that was isolated from the skin of the frog Rana ridibunda. It exhibits preferential cytotoxicity towards malignant cells, including Jurkat (T-cell leukemia), BJAB (B-cell lymphoma), HT29/219, SW742 (colon carcinomas), L929 (fibrosarcoma), MCF-7 (breast adenocarcinoma), A549 (lung carcinoma), as compared to primary cells including peripheral blood mononuclear cells (PBMC), T cells and human lung fibroblasts. Jurkat and MCF-7 cells overexpressing Bcl2, and L929 and MCF-7 over-expressing a dominant-negative mutant of a pro-apoptotic BNIP3 (ΔTM-BNIP3) were largely resistant towards Brevinin-2R treatment. The decrease in mitochondrial membrane potential (ΔΨm), or total cellular ATP levels, and increased reactive oxygen species (ROS) production, but not caspase activation or the release of apoptosis-inducing factor (AIF) or endonuclease G (Endo G), were early indicators of Brevinin-2R-triggered death. Brevinin-2R interacts with both early and late endosomes. Lysosomal membrane permeabilization inhibitors and inhibitors of cathepsin-B and cathepsin-L prevented Brevinin-2R-induced cell death. Autophagosomes have been detected upon Brevinin-2R treatment. Our results show that Brevinin-2R activates the lysosomalmitochondrial death pathway, and involves autophagy-like cell death.
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发表时间: 1997-08-29
影响因子: 3
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DOI: 10.1016/s0014-5793(01)02648-5
发表时间: 2001-07-20
期刊: FEBS LETTERS
影响因子: 3.5
作者:
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