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camptothecin/martwica

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The co-operative effects of recombinant human tumor necrosis factor (rH-TNF) and CPT-11, a new derivative of camptothecin, against the proliferation of human gynecologic tumor cell lines were examined in vitro. The ishikawa cells were responsive to rH-TNF, the HHUA cells exhibited a minimal degree
Resistance of tumor cells to chemotherapeutic agents is a major problem in cancer therapy. Continuous exposure of human histiocytic lymphoma U-937 cells to 9-nitro-camptothecin (9NC), an inhibitor of the nuclear DNA topoisomerase I, induces resistance to this drug. Because of the involvement of the
BACKGROUND The cytokine tumor-necrosis factor-related apoptosis-inducing ligand (Apo2L/TRAIL) has been shown to preferentially induce apoptosis in cancer cells. A previous study of our group demonstrated that non-small cell lung cancer cell lines can be sensitized to Apo2L/TRAIL-induced apoptosis by

Camptothecin fails to induce apoptosis in tumor necrosis factor-alpha-treated HaCaT cells.

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Camptothecin (CPT), a DNA topoisomerase I inhibitor, was originally isolated from the fruits of the Chinese Camptotheca acuminata tree. CPT and its derivatives have been used in the treatment of psoriasis and cancer in China for decades. It is well known that tumor necrosis factor-α (TNF-α) is a key

Knockdown of clusterin alters mitochondrial dynamics, facilitates necrosis in camptothecin-induced cancer stem cells.

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The existence of a well-established drug resistance mechanism in cancer stem cells (CSC) complicates the cancer treatment. Clusterin (CLU) plays a key role in maintaining the integrity of endoplasmic reticulum (ER) during drug-induced stress. Hence, silencing the CLU could significantly reduce the
During camptothecin- and etoposide (VP-16)-induced apoptosis in HL-60 cells, the expression level of cell death receptor-3 (DR3), cell death receptor-4 (DR4), and FAS remained mostly unchanged, whereas the expression of silencers of death domain (SODD) and FLICE inhibitory proteins, inhibitors of

Induction of tumor necrosis factor by a camptothecin derivative, irinotecan, in mice and human mononuclear cells.

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Irinotecan (CPT-11) has been reported to be cytotoxic to tumor cells through its inhibitory activity on type I DNA topoisomerase. CPT-11 has also been shown to have several unique biological activities apart from direct cytotoxicity. We investigated the ability of CPT-11 to induce tumor necrosis

Camptothecin induces the transit of FasL trimers to the cell surface in apoptotic HEp-2 cells.

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Fas ligand (L) is a membrane protein from the tumor necrosis factor (TNF) family. It induces apoptosis upon contact with its Fas/CD95/APO1 receptor. Trimerization of FasL on the surface of effector cells is essential in the binding of the Fas trimer of the target cells. The receptor then recruits an

MutY DNA Glycosylase Protects Cells From Tumor Necrosis Factor Alpha-Induced Necroptosis.

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Numerous studies have implied that mutY DNA glycosylase (MYH) is involved in the repair of post-replicative mispairs and plays a critical role in the base excision repair pathway. Recent in vitro studies have shown that MYH interacts with tumor necrosis factor receptor type 1-associated death domain

Apoptotic cells subjected to cold/warming exposure disorganize apoptotic microtubule network and undergo secondary necrosis.

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Apoptotic microtubule network (AMN) is organized during apoptosis, forming a cortical structure beneath the plasma membrane which plays a critical role in preserving cell morphology and plasma membrane integrity. The aim of this study was to examine the effect of cold/warming exposure on apoptotic
Though camptothecin (CPT) possesses potent anti-inflammatory, immunomodulatory, anticancerous, and antiproliferative effects, little is known about the mechanism by which CPT regulates the expression of matrix metalloproteinase-9 (MMP-9) and vascular endothelial growth factor (VEGF). Therefore, the
Protein kinase C (PKC) triggers cellular signals that regulate proliferation or death in a cell- and stimulus-specific manner. Although previous studies have demonstrated that activation of PKC with phorbol 12-myristate 13-acetate (PMA) protects cells from apoptosis induced by a number of
Tumor necrosis factor-related apoptosis-inducing-ligand (TRAIL/Apo-2 ligand) induces apoptosis in the majority of cancer cells without appreciable effect in normal cells. Here, we report the effects of TRAIL on apoptosis in several human breast cancer cell lines, primary memory epithelial cells, and
Beta-lapachone and camptothecin are structurally unrelated agents thought to inhibit topoisomerase-I activity through distinct mechanisms. We find that beta-lapachone is much more potent than camptothecin in inducing acute cytotoxic effects on human malignant glioma cells. Acute cytotoxicity induced

GSTP1 affects chemoresistance against camptothecin in human lung adenocarcinoma cells.

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Glutathione S-transferase P1 (GSTP1) is known as a xenobiotic enzyme through conjugation of glutathione and also as an inhibitor of Jun N-terminal kinase (JNK). We intended to investigate whether GSTP1 affects chemoresistance against camptothecin in human lung adenocarcinoma cells. Camptothecin
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