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camptothecin/rak
Veza se sprema u međuspremnik
Page 1 od 2311 rezultati
Antitumor activity of a camptothecin derivative, CPT-11, against human tumor xenografts in nude mice.
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The antitumor effects of the camptothecin (CPT) derivative CPT-11, 7-ethyl-10-[4-(1-piperidino)-1-piperidino]-carbonyloxycamptothecin , were tested on human tumor xenografts in nude mice. CPT-11 showed antitumor activity higher than that of Adriamycin, 5-fluorouracil, or futraful, with little or no
Belotecan, new camptothecin analogue, is active in patients with small-cell lung cancer: results of a multicenter early phase II study.
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BACKGROUND
Belotecan (Camtobell, Chong Keun Dang Corp, Seoul, Korea; CKD602) is a new camptothecin analogue. This study aimed to investigate the safety and efficacy of single-agent belotecan for small-cell lung cancer (SCLC).
METHODS
Twenty-seven patients with chemotherapy-naive or chemosensitive
Crystalline camptothecin-20(S)-O-propionate hydrate: a novel anticancer agent with strong activity against 19 human tumor xenografts.
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To find a more effective and less toxic chemotherapeutic agent, we have successfully prepared crystalline camptothecin-20(S)-O-propionate hydrate (CZ48) by reacting camptothecin with propionic anhydride using concentrated sulfuric acid as catalyst. The biological effectiveness of this new anticancer
Phase II study of belotecan, a camptothecin analogue, in combination with carboplatin for the treatment of recurrent ovarian cancer.
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BACKGROUND
Belotecan (CKD602; Camtobell, Chong Keun Dang Corp., Seoul, Korea) is a recently developed camptothecin derivative with antitumor properties. This phase II study was designed to evaluate the toxicity and efficacy of belotecan combined with carboplatin in patients with recurrent epithelial
A novel 7-modified camptothecin analog overcomes breast cancer resistance protein-associated resistance in a mitoxantrone-selected colon carcinoma cell line.
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We selected a mitoxantrone-resistant HT29 colon carcinoma cell line (HT29/MIT) that exhibited a very high degree of resistance to the selecting agent and marked resistance to topotecan and SN38, but limited resistance to doxorubicin. The development of drug resistance was independent of expression
Induction of breast cancer resistance protein by the camptothecin derivative DX-8951f is associated with minor reduction of antitumour activity.
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DX-8951f (exatecan mesylate), a new water-soluble derivative of camptothecin, is currently being evaluated in phase II clinical trials. Resistance may be acquired when treating cancer patients with DX-8951f. Therefore, we selected a subline of the human ovarian cancer cell line A2780 for resistance
Three missense mutations of DNA topoisomerase I in highly camptothecin-resistant colon cancer cell sublines.
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Various anticancer drugs, including camptothecins and indolocarbazoles, target DNA topoisomerase I (Top1). We previously described the camptothecin-resistant colon cancer cell line DLDSNR6, which has a Gly365Ser missense mutation in Top1. In the present study, we established highly
Redox-responsive amphiphilic camptothecin prodrug nanoparticles for targeted liver tumor therapy.
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Tumor cell-targeting drug delivery systems are of great importance to anti-tumor therapy in clinics. Owing to the overexpression of the asialoglycoprotein receptor (ASGPR) on the membrane of hepatoma carcinoma cells, the conjugation of lactose on the surface of drug delivery systems has already
Dynamic core crosslinked camptothecin prodrug micelles with reduction sensitivity and boronic acid-mediated enhanced endocytosis: An intelligent tumor-targeted delivery nanoplatform.
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The physicochemical properties of camptothecin (CPT) limit its clinical application. To maximize drug efficacy, a novel intelligent prodrug delivery nanoplatform with a tumor microenvironment-cleavable core crosslinking strategy was proposed based on a phenylboronic acid (PBA) modified polyethylene
The role of the DNA mismatch repair system in the cytotoxicity of the topoisomerase inhibitors camptothecin and etoposide to human colorectal cancer cells.
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The DNA mismatch repair (MMR) system is involved in the correction of base/base mismatches and insertion/deletion loops arising during replication. In addition, some of the MMR components participate in recombination and double-strand break repair as well as cell cycle regulation and apoptosis. The
Acquisition of cellular resistance to 9-nitro-camptothecin correlates with suppression of transcription factor NF-kappa B activation and potentiation of cytotoxicity by tumor necrosis factor in human histiocytic lymphoma U-937 cells.
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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
Treatment of neoplastic meningitis with intrathecal 9-nitro-camptothecin.
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The topoisomerase I inhibitor, 9-nitro-camptothecin (9NC), is highly tumoricidal against glioblastoma multiforme (GBM) in vitro. However, systemic administration of 9NC has not shown the expected efficacy in clinical trials. This failure may be due to the rapid hydrolysis of 9NC in plasma from the
Camptothecin disrupts androgen receptor signaling and suppresses prostate cancer cell growth.
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The androgen receptor (AR) is the main therapeutic target for treatment of metastatic prostate cancers. The present study demonstrates that the topoisomerase I inhibitor camptothecin selectively inhibits androgen-responsive growth of prostate cancer cells. Camptothecin strikingly inhibited mutated
Camptothecins and lung cancer: improved delivery systems by aerosol.
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Lung cancer is the largest and the most common cause of cancer-related deaths worldwide. The cure rate for lung cancer remains lowest among all malignancies. The discovery of new chemical agents with activity in first onset and recurrent disease is crucial for advancing treatment of patients with
Role of wild-type p53 in the enhancement of camptothecin cytotoxicity against human prostate tumor cells.
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The role of wild-type human p53 protein in enhancing camptothecin cytotoxicity was examined by infecting human prostate PC3 cells with adenovirus expressing human wild-type p53 gene (Adwtp53). The prostate PC3 cells are null for p53 gene. Infection induced the synthesis of both wtp53, and WAF1 (p21)
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