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Abstract Title:

Wogonin sensitizes resistant malignant cells to TNFalpha- and TRAIL-induced apoptosis.

Abstract Source:

Blood. 2006 Dec 1;108(12):3700-6. Epub 2006 Aug 24. PMID: 16931628

Abstract Author(s):

Stefanie C Fas, Sven Baumann, Jia Yun Zhu, Marco Giaisi, Monika K Treiber, Ulrich Mahlknecht, Peter H Krammer, Min Li-Weber

Article Affiliation:

Tumor Immunology Program D030, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany.

Abstract:

TNFalpha has previously been used in anticancer therapy. However, the therapeutic application of TNFalpha was largely limited due to its general toxicity and the fact that it activates the NF-kappaB-family transcription factors, which are proinflammatory and antiapoptotic. To overcome this problem in vitro, specific NF-kappaB inhibitors or transcription or protein synthesis inhibitors such as actinomycin D and cycloheximide are usually used in combination to increase TNFalpha killing of tumor cells. However, these agents also cause harmful side effects in vivo. We show here that wogonin, derived from the popular Chinese herb Huang-Qin, attenuates NF-kappaB activity by shifting TNFalpha-induced free radical .O(2)(-) to a more reduced nonradical product, H(2)O(2), and thereby sensitizes TNFalpha-resistant leukemia cells to TNFalpha-induced apoptosis. Importantly, wogonin does not affect the viability of normal peripheral blood T cells. Wogonin also sensitizes TRAIL-induced apoptosis. Our data suggest a potential use of wogonin as a TNFalpha or TRAIL adjuvant for cancer treatment. Our data also demonstrate how a herbal compound enhances killing of tumor cells with reduced side effects compared with other treatments.

Study Type : In Vitro Study

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Sayer Ji
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