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Staurosporine: new lease of life for parent compound of today's novel and highly successful anti-cancer drugs.

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Staurosporine, together with such examples as penicillin, aspirin, ivermectin and sildenafil, exemplifies the role that serendipity has in drug discovery and why 'finding things without actually searching for them' retains a prominent role in drug discovery. Hitherto not clinically useful, due to

Profilin 1 potentiates apoptosis induced by staurosporine in cancer cells.

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The correlation between the loss of Profilin 1 (Pfn1) with tumor progression indicated that Pfn1 is a tumor suppressor in human carcinoma. The molecular mechanisms underlying Pfn1 tumor suppression has yet to be elucidated. In this study, we showed that Pfn1 overexpression sensitizes cancer cells to

Dendritic cell viability is decreased after phagocytosis of apoptotic tumor cells induced by staurosporine or vaccinia virus infection.

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OBJECTIVE Dendritic cells (DC) primed with tumor antigens can effectively mediate the regression of a variety of established solid malignancies in both murine and human models. Several experimental studies indicate that apoptotic bodies are an optimal source of tumor antigens for ex vivo priming of

Staurosporine induces the cell surface expression of both forms of human tumor necrosis factor receptors on myeloid and epithelial cells and modulates ligand-induced cellular response.

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Staurosporine, an inhibitor of protein kinase C, is commonly used to inhibit the growth factor-induced signal transduction pathway at the post-receptor level. In this report, we examined the effect of staurosporine on the constitutive expression of tumor necrosis factor (TNF) receptors in K562, a

The differential staurosporine-mediated G1 arrest in normal versus tumor cells is dependent on the retinoblastoma protein.

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Previously, we reported that breast cancer cells with retinoblastoma (pRb) pathway-defective checkpoints can be specifically targeted with chemotherapeutic agents, following staurosporine-mediated reversible growth inhibition in normal cells. Here we set out to determine if the kinetics of

Differential inhibition by staurosporine, a potent protein kinase C inhibitor, of 12-O-tetradecanoylphorbol-13-acetate-caused skin tumor promotion, epidermal ornithine decarboxylase induction, hyperplasia and inflammation.

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The effect of staurosporine on 7,12-dimethylbenz[a]anthracene (DMBA)-initiated and 12-O-tetradecanoylphorbol-13-acetate (TPA)-promoted skin papilloma formation was examined in CD-1 mice. A topical application of staurosporine 15 min prior to each TPA treatment resulted in a dose-related inhibition

Induction of apoptosis by gemcitabine in BG-1 human ovarian cancer cells compared with induction by staurosporine, paclitaxel and cisplatin.

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A variety of chemotherapeutic agents induce cell death via apoptosis. We had shown previously that gemcitabine (2',2'-difluorodeoxycytidine) induced an atypical apoptosis in BG-1 human ovarian cancer cells; therefore, further studies were conducted to characterize more precisely gemcitabine-induced

Staurosporine-induced death of MCF-7 human breast cancer cells: a distinction between caspase-3-dependent steps of apoptosis and the critical lethal lesions.

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To test the role of caspase 3 in apoptosis and in overall cell lethality caused by the protein kinase inhibitor staurosporine, we compared the responses of MCF-7c3 cells that express a stably transfected CASP-3 gene to parental MCF-7:WS8 cells transfected with vector alone and lacking procaspase-3

Comparison of the efficacy of 7-hydroxystaurosporine (UCN-01) and other staurosporine analogs to abrogate cisplatin-induced cell cycle arrest in human breast cancer cell lines.

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DNA-damaging agents such as cisplatin arrest cell cycle progression at either the G1, S, or G2 phase, although the G1 arrest is seen only in cells expressing the wild-type p53 tumor suppressor protein. Caffeine has been shown to abrogate the S and G2 arrest in p53-defective cells and to enhance

12-O-tetradecanoylphorbol-13-acetate and staurosporine induce increased retinoblastoma tumor suppressor gene expression with megakaryocytic differentiation of leukemic cells.

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The phorbol ester, 12-O-tetradecanoylphorbol-13-acetate (TPA), induced increased expression of the retinoblastoma (RB) tumor suppressor gene product in the course of megakaryocytic differentiation of the K562 human leukemia cell line, a differentiatively multipotent hematopoietic precursor cell. The

Sensitization of tumor cells to tumor necrosis factor action by the protein kinase inhibitor staurosporine.

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Tumor necrosis factor (TNF), first described as a cytokine with tumor-necrotizing activity, is now known to be a pleiotropic molecule. The molecular mechanisms responsible for the cytotoxic activity of TNF on malignant cells are still largely unknown. In this study, we report that the protein kinase

[Protein kinase inhibitor staurosporine enhances cytotoxicity of antitumor drugs to cancer cells].

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Treated with low dosage (5 ng.ml-1) of staurosporine for 18 h, human embryo lung 2BS cells were blocked at the G1/S boundary, but human gastric carcinoma BGC-823 cells still kept their cell cycle. In comparison with IC50 of 2BS and BGC-823 cells treated with cell cycle phase specific antitumor drugs

Differing effects of staurosporine and UCN-01 on RB protein phosphorylation and expression of lung cancer cell lines.

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The retinoblastoma gene product (RB protein) plays a key role in the progression of the cell cycle from G1 to S phase in normal and neoplastic cells. The activity of RB is regulated by phosphorylation and dephosphorylation with cell-cycle-dependent protein kinases. We investigated the effect of the

Inhibition of tumor formation from grafted murine papilloma cells by treatment of grafts with staurosporine, an inducer of squamous differentiation.

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The microbial alkaloid staurosporine induces responses associated with protein kinase C activation, resulting in terminal differentiation in cultures of both normal and neoplastic mouse epidermal cells. As a cancer chemotherapy model, we treated grafts of mouse epidermal tumor cell lines 308 and

Profilin1 facilitates staurosporine-triggered apoptosis by stabilizing the integrin β1-actin complex in breast cancer cells.

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Profilin1 (Pfn1) functions as a tumour suppressor against malignant phenotypes of cancer cells. A minimum level of Pfn1 is critical for the differentiation of human epithelial cells, and its lower expression correlates with the tumourigenesis of breast cancer cells and tissues. However, the

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