camptotheca yunnanensis/kanser

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[Topotecan for pediatric patients with resistant and recurrent solid tumors].

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BACKGROUND Topotecan is a cytotoxic drug isolated from the Camptotheca acuminata tree (from China). It is able to block the enzyme DNA topoisomerase I and has recently been used in the treatment of pediatric cancer. OBJECTIVE To evaluate our preliminary experience with topotecan in the second line

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

The emerging role of irinotecan (CPT-11) in the treatment of malignant glioma in brain tumors.

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Irinotecan is a water-soluble derivative of camptothecin, an alkylator originally extracted from the Chinese tree Camptotheca acuminata. Laboratory studies have demonstrated the activity of irinotecan in a broad panel of pediatric and adult central nervous system tumor xenografts in athymic nude

Extraction and composition of three naturally occurring anti-cancer alkaloids in Camptotheca acuminata seed and leaf extracts.

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Naturally occurring camptothecins (CPT) are important sources of chemotherapeutic agents for clinical treatment of cancer. Extraction of CPT from Camptotheca acuminata trees remains to be a cost-effective way in the supply equation compared with a total synthesis. This study conducted a series of

Regression of human colon cancer xenografts in SCID mice following oral administration of water-insoluble camptothecins.

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Gastrointestinal cancers pose major public health problems worldwide, in part because little progress has been made in the treatment of colorectal cancers. The present study explored the potential use of natural product topoisomerase I inhibitors, 10-hydroxycamptothecin (HCPT) and camptothecin

Cross-Kingdom Regulation of Putative miRNAs Derived from Happy Tree in Cancer Pathway: A Systems Biology Approach.

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MicroRNAs (miRNAs) are well-known key regulators of gene expression primarily at the post-transcriptional level. Plant-derived miRNAs may pass through the gastrointestinal tract, entering into the body fluid and regulate the expression of endogenous mRNAs. Camptotheca acuminata, a highly important

Camptothecin analogues in the treatment of non-small cell lung cancer.

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Camptothecin is a natural product derived from the Oriental tree Camptotheca acuminata which has shown activity in a number of experimental tumors. Its clinical development was halted in the early-70s owing to its unpredictable and formidable toxicities. Two water-soluble camptothecin analogs have

Antitumor activity and pharmacokinetics following oral administration of natural product DNA topoisomerase I inhibitors 10-hydroxycamptothecin and camptothecin in SCID mice bearing human breast cancer xenografts.

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The DNA topoisomerase I inhibitors, 10-hydroxycamptothecin (HCPT) and camptothecin (CPT), are indole alkaloids isolated from the Chinese tree, Camptotheca acuminata. They have been shown to have a wide spectrum of anticancer activity both in vitro and in vivo. However, their use has been limited due

Delivery methods of camptothecin and its hydrosoluble analogue irinotecan for treatment of colorectal cancer.

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Camptothecins are a family of alkaloids originally extracted from the Chinese tree Camptotheca acuminata, Nyssaceae, exhibiting a strong activity against colorectal cancer (CRC). CRC is a common malignancy worlwide. Despite significant developments in the treatment of this disease, it still causes

Anti-cancer drug discovery and development in Brazil: targeted plant collection as a rational strategy to acquire candidate anti-cancer compounds.

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Throughout medical history, plant products have been shown to be valuable sources of novel anti-cancer drugs. Examples are the VINCA: alkaloids, the taxanes, and the camptothecins, derived from the Madagscan periwinkle plant Catharantus roseus, the Pacific yew Taxus brevifolia, and the Chinese tree

Therapeutic applications of medicinal plants in the treatment of breast cancer: a review of their pharmacology, efficacy and tolerability.

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Various active compounds (or their semi-synthetic derivatives) derived from medicinal plants have been assessed for their efficacy and tolerability in the treatment of breast cancer. Some of these plant species, including Taxus baccata (paclitaxel, docetaxel), Podophyllum peltatum (etoposide),

Advances in cancer therapy with plant based natural products.

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Natural Products have long been a fertile source of cure for cancer, which is projected to become the major causes of death in this century. However, there is a continuing need for development of new anticancer drugs, drug combinations and chemotherapy strategies, by methodical and scientific

CIL-102-Induced Cell Cycle Arrest and Apoptosis in Colorectal Cancer Cells via Upregulation of p21 and GADD45.

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CIL-102 (1-[4-(furo[2,3-b]quinolin-4-ylamino)phenyl]ethanone) is a well-known, major active agent of the alkaloid derivative of Camptotheca acuminata with valuable biological properties, including anti-tumorigenic activity. In this study, we investigated the molecular mechanisms by which CIL-102

De novo genome assembly of Camptotheca acuminata, a natural source of the anti-cancer compound camptothecin.

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Camptotheca acuminata is 1 of a limited number of species that produce camptothecin, a pentacyclic quinoline alkaloid with anti-cancer activity due to its ability to inhibit DNA topoisomerase. While transcriptome studies have been performed previously with various camptothecin-producing species, no

Cellular localisation of the anti-cancer drug camptothecin in Camptotheca acuminata Decne (Nyssaceae).

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In Camptotheca acuminata, we studied the cellular sites of accumulation of the alkaloid camptothecin (CPT), in both plants grown in the field and those grown in a greenhouse, subjecting the latter to stress (i.e., draught, nutritional deficit, and pruning). Fresh sections of the leaf, stem, and root

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