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Tu L, Zhou Z, Ma Y, Du L, Si Z, Yue Y, Zhang H, Zhu H, Liu Y, Chen P. Identification of 7-aminourea or 7-aminothiourea derivatives of camptothecin as selective topoisomerase I inhibitors with anti-colorectal cancer activities. Bioorg Chem 2024; 152:107723. [PMID: 39182258 DOI: 10.1016/j.bioorg.2024.107723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 07/21/2024] [Accepted: 08/12/2024] [Indexed: 08/27/2024]
Abstract
Colorectal cancer (CRC) remains one of the most prevalent malignant tumors of the digestive system, yet the availability of safe and effective chemotherapeutic agents for clinical use remains limited. Camptothecin (CPT) and its derivatives, though approved for cancer treatment, have encountered significant challenges in clinical application due to their low bioavailability and high systemic toxicity. Strategic modification at the 7-position of CPT enables the development of novel CPT derivatives with high activity. In the present study, a series of compounds incorporating aminoureas, amino thioureas, and acylamino thioureas as substituents at the 7-position were screened. These compounds were subsequently evaluated for their cytotoxicity against the human gastric cancer (GC) cell line AGS and the CRC cell line HCT116. Two derivatives, XSJ05 (IC50 = 0.006 ± 0.003 μM) and XSJ07 (IC50 = 0.013 ± 0.003 μM), exhibited remarkably effective anti-CRC activity, being better than TPT. In addition, they have a better safety profile. In vitro mechanistic studies revealed that XSJ05 and XSJ07 exerted their inhibitory effects on CRC cell proliferation by suppressing the activity of topoisomerase I (Topo I). This suppression triggers DNA double-strand breaks, leads to DNA damage and subsequently causes CRC cells to arrest in the G2/M phase. Ultimately, the cells undergo apoptosis. Collectively, these findings indicate that XSJ05 and XSJ07 possess superior activity coupled with favorable safety profiles, suggesting their potential as lead compounds for the development of CRC therapeutics.
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Affiliation(s)
- Lixue Tu
- School of Pharmacy, Lanzhou University, No. 199 Donggang West Road, Lanzhou 730000, PR China
| | - Zhongkun Zhou
- School of Pharmacy, Lanzhou University, No. 199 Donggang West Road, Lanzhou 730000, PR China
| | - Yunhao Ma
- School of Pharmacy, Lanzhou University, No. 199 Donggang West Road, Lanzhou 730000, PR China
| | - Liqian Du
- School of Pharmacy, Lanzhou University, No. 199 Donggang West Road, Lanzhou 730000, PR China
| | - Zhenzhen Si
- School of Pharmacy, Lanzhou University, No. 199 Donggang West Road, Lanzhou 730000, PR China
| | - Yuqi Yue
- School of Pharmacy, Lanzhou University, No. 199 Donggang West Road, Lanzhou 730000, PR China
| | - Hua Zhang
- School of Pharmacy, Lanzhou University, No. 199 Donggang West Road, Lanzhou 730000, PR China
| | - Hongmei Zhu
- School of Pharmacy, Lanzhou University, No. 199 Donggang West Road, Lanzhou 730000, PR China
| | - Yingqian Liu
- School of Pharmacy, Lanzhou University, No. 199 Donggang West Road, Lanzhou 730000, PR China.
| | - Peng Chen
- School of Pharmacy, Lanzhou University, No. 199 Donggang West Road, Lanzhou 730000, PR China.
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2
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Yan L, Nan X, Zhang C, Wang H, Huang X, Hu J, Liu Y. Development of an enzyme‑linked immunosorbent assay for camptothecin. Mol Med Rep 2019; 20:959-966. [PMID: 31173229 PMCID: PMC6625201 DOI: 10.3892/mmr.2019.10342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 05/10/2019] [Indexed: 11/06/2022] Open
Abstract
The use of camptothecin and its analogues has increased in clinical settings and in agriculture. Therefore, camptothecins and their derivatives, metabolites and degradation products are frequently found in the environment. Therefore, it is important to develop an ELISA for the quantification of camptothecins in human plasma, plants, animal tissues and other matrices. The present study developed a novel competitive indirect ELISA for camptothecin using a monoclonal antibody (MAb). In total, two haptens and various carrier proteins were tested to select the most suitable immunogen for the production of MAbs against camptothecin. Hapten 1 conjugated with keyhole limpet hemocyanin was selected for the preparation of MAb 5A3, and was used to establish a competitive indirect ELISA for camptothecin. A total of three derivatives of camptothecin used in clinical practice were examined. Topotecan showed an IC50 value of 0.68 µg/ml with a detection limit of 0.19 µg/ml, belotecan showed an IC50 value of 0.87 µg/ml with a detection limit of 0.22 µg/ml and irinotecan showed an IC50 value of 2.85 µg/ml with a detection limit of 0.47 µg/ml. The cross-reactivity results suggested that the assay developed in the present study possessed a high sensitivity to camptothecin. Therefore, this immunoassay technique may be suitable for monitoring the levels of camptothecin in compound analysis, clinical applications, and analyses of food and environmental samples.
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Affiliation(s)
- Liting Yan
- Central Laboratory, Shaanxi Provincial People's Hospital, Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi 710068, P.R. China
| | - Xiang Nan
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Cunzheng Zhang
- Institute of Food Quality and Safety Inspection, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu 210014, P.R. China
| | - Haifang Wang
- Institute of Integrated Medicine, Shaanxi University of Traditional Chinese Medicine, Xi'an, Shaanxi 712046, P.R. China
| | - Xiaoyan Huang
- Central Laboratory, Shaanxi Provincial People's Hospital, Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi 710068, P.R. China
| | - Jun Hu
- Central Laboratory, Shaanxi Provincial People's Hospital, Research Center of Cell Immunological Engineering and Technology of Shaanxi Province, Xi'an, Shaanxi 710068, P.R. China
| | - Yingqian Liu
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
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Song ZL, Yang GZ, Li JC, Liu YQ, Yang CJ, Goto M, Zhang ZJ, Morris-Natschke SL, Liu H, Lee KH. Design and synthesis of novel 7-[( N-substituted-thioureidopiperazinyl)-methyl]-camptothecin derivatives as potential cytotoxic agents. Nat Prod Res 2019; 34:2022-2029. [PMID: 30784310 DOI: 10.1080/14786419.2019.1573231] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
As part of continuing our research on diverse C-7 derivatives of camptothecin (CPT), 16 CPT derivatives bearing piperazinyl-thiourea chemical scaffold and different substituent groups have been designed, synthesized and evaluated in vitro for cytotoxicity against five tumor cell lines (A-549, MDA-MB-231, MCF-7, KB and KBvin). As a result, all the synthesized compounds showed promising in vitro cytotoxic activity against the five tumor cell lines tested, and were more potent than irinotecan. Importantly, compounds 13 g (IC50 = 0.514 μM) and 13o (IC50 = 0.275 μM) possessed similar or better antiproliferative activity against the multidrug-resistant (MDR) KBvin subline than that of topotecan (IC50 = 0.511 μM) and merit further development as anticancer candidates for clinical trail. With these results in hand, we have a reason to conclude that incorporating piperazinyl-thiourea motifs into position-7 of camptothecin confers well cytotoxic activity against cancer cell lines, probably resulting in new anticancer drugs.
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Affiliation(s)
- Zi-Long Song
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Guan-Zhou Yang
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Jun-Cai Li
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Ying-Qian Liu
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Chen-Jie Yang
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Masuo Goto
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Zhi-Jun Zhang
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Susan L Morris-Natschke
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Hua Liu
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Kuo-Hsiung Lee
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina, USA.,Chinese Medicine Research and Development Center, China Medical University and Hospital, Taichung, Taiwan
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Yang CJ, Song ZL, Goto M, Liu YQ, Hsieh KY, Morris-Natschke SL, Zhao YL, Zhang JX, Lee KH. Design, synthesis, and cytotoxic activity of novel 7-substituted camptothecin derivatives incorporating piperazinyl-sulfonylamidine moieties. Bioorg Med Chem Lett 2017; 27:3959-3962. [PMID: 28789891 DOI: 10.1016/j.bmcl.2017.07.078] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 07/26/2017] [Accepted: 07/28/2017] [Indexed: 11/28/2022]
Abstract
In our continuing search for camptothecin (CPT)-derived antitumor drugs, novel 7-substituted CPT derivatives incorporating piperazinyl-sulfonylamidine moieties were designed, synthesized and evaluated for cytotoxicity against five tumor cell lines (A-549, MDA-MB-231, MCF-7, KB, and KB-VIN). All of the derivatives showed promising in vitro cytotoxic activity against the tested tumor cell lines, and were more potent than irinotecan. Remarkably, most of the compounds exhibited comparable cytotoxicity against the multidrug-resistant (MDR) KB-VIN and parental KB tumor cell lines, while irinotecan lost activity completely against KB-VIN. Especially, compounds 13r and 13p (IC50 0.38 and 0.85μM, respectively) displayed the greatest cytotoxicity against the MDR KB-VIN cell line and merit further development into preclinical and clinical drug candidates for treating cancer, including MDR phenotype.
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Affiliation(s)
- Cheng-Jie Yang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Zi-Long Song
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Masuo Goto
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, United States
| | - Ying-Qian Liu
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China.
| | - Kan-Yen Hsieh
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, United States
| | - Susan L Morris-Natschke
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, United States
| | - Yong-Long Zhao
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Jun-Xiang Zhang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Kuo-Hsiung Lee
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, United States; Chinese Medicine Research and Development Center, China Medical University and Hospital, Taichung, Taiwan.
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Zhu GX, Cheng PL, Goto M, Zhang N, Morris-Natschke SL, Hsieh KY, Yang GZ, Yang QR, Liu YQ, Chen HL, Zhang XS, Lee KH. Design, synthesis and potent cytotoxic activity of novel 7-(N-[(substituted-sulfonyl)piperazinyl]-methyl)-camptothecin derivatives. Bioorg Med Chem Lett 2017; 27:1750-1753. [PMID: 28285912 PMCID: PMC5512430 DOI: 10.1016/j.bmcl.2017.02.066] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 02/22/2017] [Accepted: 02/26/2017] [Indexed: 11/24/2022]
Abstract
In an effort to discover potent camptothecin-derived antitumor agents, novel camptothecin analogues with sulfonylpiperazinyl motifs at position-7 were designed and synthesized. They were evaluated for in vitro cytotoxicity with the sulforhodamine-B (SRB) method in five types of human tumor cell lines, A-549, MDA-MB-231, KB, KB-VIN and MCF-7. With IC50 values in the low μM to nM level, most of the new analogues showed greater cytotoxicity activity than the reference compounds irinotecan and topotecan. Furthermore, compounds 12l (IC50, 1.2nM) and 12k (IC50, 20.2nM) displayed the highest cytotoxicity against the multidrug-resistant (MDR) KB-VIN cell line and merit further development as preclinical drug candidates for treating cancer, including MDR phenotype. Our study suggested that integration of sulfonylpiperazinyl motifs into position-7 of camptothecin is an effective strategy for discovering new potent cytotoxic camptothecin derivatives.
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Affiliation(s)
- Gao-Xiang Zhu
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Pi-Le Cheng
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Masuo Goto
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, United States
| | - Na Zhang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Susan L Morris-Natschke
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, United States
| | - Kan-Yen Hsieh
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, United States
| | - Guan-Zhou Yang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Qian-Ru Yang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Ying-Qian Liu
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China.
| | - Hai-Le Chen
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Xiao-Shuai Zhang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Kuo-Hsiung Lee
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, United States; Chinese Medicine Research and Development Center, China Medical University and Hospital, Taichung, Taiwan.
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6
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Wu D, Zhang SY, Liu YQ, Wu XB, Zhu GX, Zhang Y, Wei W, Liu HX, Chen AL. Synthesis, biological activities, and quantitative structure-activity relationship (QSAR) study of novel camptothecin analogues. Molecules 2015; 20:8634-53. [PMID: 25985362 PMCID: PMC6272283 DOI: 10.3390/molecules20058634] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 04/18/2015] [Accepted: 04/27/2015] [Indexed: 11/16/2022] Open
Abstract
In continuation of our program aimed at the development of natural product-based pesticidal agents, three series of novel camptothecin derivatives were designed, synthesized, and evaluated for their biological activities against T. Cinnabarinus, B. brassicae, and B. xylophilus. All of the derivatives showed good-to-excellent activity against three insect species tested, with LC50 values ranging from 0.00761 to 0.35496 mmol/L. Remarkably, all of the compounds were more potent than CPT against T. Cinnabarinus, and compounds 4d and 4c displayed superior activity (LC50 0.00761 mmol/L and 0.00942 mmol/L, respectively) compared with CPT (LC50 0.19719 mmol/L) against T. Cinnabarinus. Based on the observed bioactivities, preliminary structure-activity relationship (SAR) correlations were also discussed. Furthermore, a three-dimensional quantitative structure-activity relationship (3D-QSAR) model using comparative molecular field analysis (CoMFA) was built. The model gave statistically significant results with the cross-validated q2 values of 0.580 and correlation coefficient r2 of 0.991 and of 0.993. The QSAR analysis indicated that the size of the substituents play an important in the activity of 7-modified camptothecin derivatives. These findings will pave the way for further design, structural optimization, and development of camptothecin-derived compounds as pesticidal agents.
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Affiliation(s)
- Dan Wu
- Local and National Joint Engineering Laboratory of Biopesticide High-Efficient Preparation Technology, Zhejiang A&F University, Lin'an 311300, China.
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China.
| | - Shao-Yong Zhang
- Local and National Joint Engineering Laboratory of Biopesticide High-Efficient Preparation Technology, Zhejiang A&F University, Lin'an 311300, China.
| | - Ying-Qian Liu
- Local and National Joint Engineering Laboratory of Biopesticide High-Efficient Preparation Technology, Zhejiang A&F University, Lin'an 311300, China.
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China.
| | - Xiao-Bing Wu
- Local and National Joint Engineering Laboratory of Biopesticide High-Efficient Preparation Technology, Zhejiang A&F University, Lin'an 311300, China.
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China.
| | - Gao-Xiang Zhu
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China.
| | - Yan Zhang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China.
| | - Wei Wei
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China.
| | - Huan-Xiang Liu
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China.
| | - An-Liang Chen
- Local and National Joint Engineering Laboratory of Biopesticide High-Efficient Preparation Technology, Zhejiang A&F University, Lin'an 311300, China.
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Westover D, Ling X, Lam H, Welch J, Jin C, Gongora C, Del Rio M, Wani M, Li F. FL118, a novel camptothecin derivative, is insensitive to ABCG2 expression and shows improved efficacy in comparison with irinotecan in colon and lung cancer models with ABCG2-induced resistance. Mol Cancer 2015; 14:92. [PMID: 25928015 PMCID: PMC4427926 DOI: 10.1186/s12943-015-0362-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 04/07/2015] [Indexed: 11/26/2022] Open
Abstract
Background Irinotecan is a camptothecin analogue currently used in clinical practice to treat advanced colorectal cancer. However, acquired resistance mediated by the drug efflux pump ABCG2 is a recognized problem. We reported on a novel camptothecin analogue, FL118, which shows anticancer activity superior to irinotecan. In this study, we sought to investigate the potency of FL118 versus irinotecan or its active metabolite, SN-38, in both in vitro and in vivo models of human cancer with high ABCG2 activity. We also sought to assess the potency and ABCG2 affinity of several FL118 analogues with B-ring substitutions. Methods Colon and lung cancer cells with and without ABCG2 overexpression were treated with FL118 in the presence and absence of Ko143, an ABCG2-selective inhibitor, or alternatively by genetically modulating ABCG2 expression. Using two distinct in vivo human tumor animal models, we further assessed whether FL118 could extend time to progression in comparison with irinotecan. Lastly, we investigated a series of FL118 analogues with B-ring substitutions for ABCG2 sensitivity. Results Both pharmacological inhibition and genetic modulation of ABCG2 demonstrated that, in contrast to SN-38, FL118 was able to bypass ABCG2-mediated drug resistance. FL118 also extended time to progression in both in vivo models by more than 50% compared with irinotecan. Lastly, we observed that FL118 analogues with polar substitutions had higher affinity for ABCG2, suggesting that the nonpolar nature of FL118 plays a role in bypassing ABCG2-mediated resistance. Conclusions Our results suggest that in contrast to SN-38 and topotecan, FL118 is a poor substrate for ABCG2 and can effectively overcome ABCG2-mediated drug resistance. Our findings expand the uniqueness of FL118 and support continued development of FL118 as an attractive therapeutic option for patients with drug-refractory cancers resulting from high expression of ABCG2. Electronic supplementary material The online version of this article (doi:10.1186/s12943-015-0362-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- David Westover
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, 14263, USA.
| | - Xiang Ling
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, 14263, USA. .,Canget BioTekpharma, LLC, Buffalo, NY, 14203, USA.
| | - Hong Lam
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, 14263, USA.
| | - Jacob Welch
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, 14263, USA.
| | - Chunyang Jin
- Center for Drug Discovery, RTI International, Research Triangle Park, NC, 27709, USA.
| | - Celine Gongora
- IRCM, Institut de Recherche en Cancérologie de Montpellier; INSERM, U896; Université Montpellier1; Institut régional du Cancer Montpellier, F-34298, Montpellier, France.
| | - Maguy Del Rio
- IRCM, Institut de Recherche en Cancérologie de Montpellier; INSERM, U896; Université Montpellier1; Institut régional du Cancer Montpellier, F-34298, Montpellier, France.
| | - Mansukh Wani
- Center for Drug Discovery, RTI International, Research Triangle Park, NC, 27709, USA.
| | - Fengzhi Li
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, 14263, USA.
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Neubert TD, Schmidt Y, Conroy E, Stamos D. Radical Mediated C–H Functionalization of 3,6-Dichloropyridazine: Efficient Access to Novel Tetrahydropyridopyridazines. Org Lett 2015; 17:2362-5. [DOI: 10.1021/acs.orglett.5b00861] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Timothy D. Neubert
- Vertex Pharmaceuticals Incorporated, Department of Chemistry 11010 Torreyana Road, San
Diego, California 92121, United States
| | - Yvonne Schmidt
- Vertex Pharmaceuticals Incorporated, Department of Chemistry 11010 Torreyana Road, San
Diego, California 92121, United States
| | - Erica Conroy
- Vertex Pharmaceuticals Incorporated, Department of Chemistry 11010 Torreyana Road, San
Diego, California 92121, United States
| | - Dean Stamos
- Vertex Pharmaceuticals Incorporated, Department of Chemistry 11010 Torreyana Road, San
Diego, California 92121, United States
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9
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Zhao XB, Goto M, Song ZL, Morris-Natschke SL, Zhao Y, Wu D, Yang L, Li SG, Liu YQ, Zhu GX, Wu XB, Lee KH. Design and synthesis of new 7-(N-substituted-methyl)-camptothecin derivatives as potent cytotoxic agents. Bioorg Med Chem Lett 2014; 24:3850-3. [PMID: 25008456 DOI: 10.1016/j.bmcl.2014.06.060] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 06/17/2014] [Accepted: 06/19/2014] [Indexed: 11/30/2022]
Abstract
A series of novel 7-(N-substituted-methyl)-camptothecin derivatives was designed, synthesized, and evaluated for in vitro cytotoxicity against four human tumor cell lines, A-549, MDA-MB-231, KB, and KBvin. All of the derivatives showed promising in vitro cytotoxic activity against the tested tumor cell lines, with IC50 values ranging from 0.0023 to 1.11 μM, and were as or more potent than topotecan. Compounds 9d, 9e, and 9r exhibited the highest antiproliferative activity among all prepared derivatives. Furthermore, all of the compounds were more potent than paclitaxel against the multidrug-resistant (MDR) KBvin subline. With a concise efficient synthesis and potent cytotoxic profiles, especially significant activity towards KBvin, compounds 9d, 9e, and 9r merit further development as a new generation of camptothecin-derived anticancer clinical trial candidates.
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Affiliation(s)
- Xiao-Bo Zhao
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Masuo Goto
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, United States
| | - Zi-Long Song
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Susan L Morris-Natschke
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, United States
| | - Yu Zhao
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, United States
| | - Dan Wu
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Liu Yang
- Environmental and Municipal Engineering School, Lanzhou Jiaotong University, Lanzhou 730000, PR China
| | - Shu-Gang Li
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Ying-Qian Liu
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China.
| | - Gao-Xiang Zhu
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Xiao-Bing Wu
- School of Pharmacy, Lanzhou University, Lanzhou 730000, PR China
| | - Kuo-Hsiung Lee
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, United States; Chinese Medicine Research and Development Center, China Medical University and Hospital, Taichung, Taiwan.
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10
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Wang L, Huang Y, Zhang J, Tong L, Chen Y, Lu W, Huang Q. Suzuki coupling based synthesis and in vitro cytotoxic evaluation of 7-heteroaryl-substituted camptothecin analogs. Bioorg Med Chem Lett 2014; 24:1597-9. [DOI: 10.1016/j.bmcl.2014.01.049] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Revised: 01/15/2014] [Accepted: 01/20/2014] [Indexed: 10/25/2022]
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11
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Wang L, Yuan W, Zhang J, Tong L, Luo Y, Chen Y, Lu W, Huang Q. Synthesis of 7-Triazole-substituted Camptothecin via Click Chemistry and Evaluation of in vitro Antitumor Activity. CHINESE J CHEM 2013. [DOI: 10.1002/cjoc.201300703] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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12
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Yang L, Zhang ZJ, Liu YQ, Zhao CY, Wang MJ, Nan X, Feng G. Evaluation of insecticidal activity of camptothecin analogs against Brontispa longissima. Med Chem Res 2013. [DOI: 10.1007/s00044-013-0703-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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13
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Rodriguez-Berna G, Cabañas MJD, Mangas-Sanjuán V, Gonzalez-Alvarez M, Gonzalez-Alvarez I, Abasolo I, Schwartz S, Bermejo M, Corma A. Semisynthesis, cytotoxic activity, and oral availability of new lipophilic 9-substituted camptothecin derivatives. ACS Med Chem Lett 2013; 4:651-5. [PMID: 24900725 DOI: 10.1021/ml400125z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Accepted: 05/28/2013] [Indexed: 11/29/2022] Open
Abstract
Despite that 9-substituted camptothecins are promising candidates in cancer therapy, the limited accessibility to this position has reduced the studies of these derivatives to a few standard modifications. We report herein a novel semisynthetic route based on the Tscherniac-Einhorn reaction to synthesize new lipophilic camptothecin derivatives with amidomethyl and imidomethyl substitutions in position 9. Compounds were evaluated for their antiproliferative activity, topoisomerase I inhibition, and oral availability. Preliminary data demonstrated that bulky imidomethyl modification is an appropriate lipophilic substitution for an effective oral administration relative to topotecan. In addition, this general procedure paves the way for obtaining new camptothecin derivatives.
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Affiliation(s)
- Guillermo Rodriguez-Berna
- Instituto Mixto de Tecnología
Química, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avd. de los Naranjos s/n, 46006 Valencia, Spain
| | - Maria Jose Díaz Cabañas
- Instituto Mixto de Tecnología
Química, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avd. de los Naranjos s/n, 46006 Valencia, Spain
| | - Victor Mangas-Sanjuán
- Depto. de Ingeniería, Área Farmacia
y Tecnología Farmacéutica, Universidad Miguel Hernández, Carretera Alicante-Valencia
km. 87, 03550 San Juan, Alicante, Spain
| | - Marta Gonzalez-Alvarez
- Depto. de Ingeniería, Área Farmacia
y Tecnología Farmacéutica, Universidad Miguel Hernández, Carretera Alicante-Valencia
km. 87, 03550 San Juan, Alicante, Spain
| | - Isabel Gonzalez-Alvarez
- Depto. de Ingeniería, Área Farmacia
y Tecnología Farmacéutica, Universidad Miguel Hernández, Carretera Alicante-Valencia
km. 87, 03550 San Juan, Alicante, Spain
| | - Ibane Abasolo
- CIBBIM-Nanomedicine, Hospital Universitari Vall d’Hebrón
and Vall d’Hebrón Institut de Recerca, Universitat Autónoma de Barcelona, 08035 Barcelona,
Spain
| | - Simó Schwartz
- CIBBIM-Nanomedicine, Hospital Universitari Vall d’Hebrón
and Vall d’Hebrón Institut de Recerca, Universitat Autónoma de Barcelona, 08035 Barcelona,
Spain
| | - Marival Bermejo
- Depto. de Ingeniería, Área Farmacia
y Tecnología Farmacéutica, Universidad Miguel Hernández, Carretera Alicante-Valencia
km. 87, 03550 San Juan, Alicante, Spain
| | - Avelino Corma
- Instituto Mixto de Tecnología
Química, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avd. de los Naranjos s/n, 46006 Valencia, Spain
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Zhu L, Zhang X, Lei N, Liu W, Miao Z, Zhuang C, Sheng C, Guo W, Dong G, Yao J, Cheng P, Zhang W. Synthesis and biological evaluation of 7-alkenyl homocamptothecins as potent topoisomerase I inhibitors. Chem Biodivers 2012; 9:1084-94. [PMID: 22700227 DOI: 10.1002/cbdv.201100195] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Homocamptothecin (hCPT) is a camptothecin (CPT) derivative with a seven-membered β-hydroxylactone E ring, which shows higher lactone stability and improves topoisomerase I (Topo I) inhibition activity. In an attempt to improve the antitumor activity of homocamptothecins, a series of 7-alkenyl-homocamptothecin derivatives was designed and synthesized based on a semisynthetic route starting from CPT. Most of the synthesized compounds exhibit higher cytotoxic activities on the A-549 tumor cell line than topotecan (TPT). Some compounds such as 2a and 2o show a broad in vitro antitumor spectrum and exhibit superior Topo I-inhibition activity.
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Affiliation(s)
- Lingjian Zhu
- School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, P. R. China
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Christodoulou MS, Zunino F, Zuco V, Borrelli S, Comi D, Fontana G, Martinelli M, Lorens JB, Evensen L, Sironi M, Pieraccini S, Dalla Via L, Gia OM, Passarella D. Camptothecin-7-yl-methanthiole: Semisynthesis and Biological Evaluation. ChemMedChem 2012; 7:2134-43. [DOI: 10.1002/cmdc.201200322] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Revised: 09/13/2012] [Indexed: 11/12/2022]
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16
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Zhu L, Cheng P, Lei N, Yao J, Sheng C, Zhuang C, Guo W, Liu W, Zhang Y, Dong G, Wang S, Miao Z, Zhang W. Synthesis and Biological Evaluation of Novel Homocamptothecins Conjugating with Dihydropyrimidine Derivatives as Potent Topoisomerase I Inhibitors. Arch Pharm (Weinheim) 2011; 344:726-34. [DOI: 10.1002/ardp.201000402] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Revised: 02/28/2011] [Accepted: 03/02/2011] [Indexed: 11/07/2022]
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17
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Meruva SB, Raghunadh A, Anil Kumar N, Syam Kumar UK, Vasu Dev R, Dubey PK. Synthesis of 5-aryl and 5-amidocamptothecins. J Heterocycl Chem 2011. [DOI: 10.1002/jhet.590] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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18
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Ricci A, Marinello J, Bortolus M, Sánchez A, Grandas A, Pedroso E, Pommier Y, Capranico G, Maniero AL, Zagotto G. Electron paramagnetic resonance (EPR) study of spin-labeled camptothecin derivatives: a different look of the ternary complex. J Med Chem 2011; 54:1003-9. [PMID: 21254781 DOI: 10.1021/jm101232t] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Camptothecin (CPT) derivatives are clinically effective poisons of DNA topoisomerase I (Top1) able to form a ternary complex with the Top1-DNA complex. The aim of this investigation was to examine the dynamic aspects of the ternary complex formation by means of site-directed spin labeling electron paramagnetic resonance (SDSL-EPR). Two semisynthetic CPT derivatives bearing the paramagnetic moiety were synthesized, and their biological activity was tested. A 22-mer DNA oligonucleotide sequence with high affinity cleavage site for Top1 was also synthesized. EPR experiments were carried out on modified CPT in the presence of DNA, of Top1, or of both. In the last case, a slow motion component in the EPR signal appeared, indicating the formation of the ternary complex. Deconvolution of the EPR spectrum allowed to obtain the relative drug amounts in the complex. It was also possible to demonstrate that the residence time of CPT "trapped" in the ternary complex is longer than hundreds of microseconds.
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Affiliation(s)
- Antonio Ricci
- Department of Pharmaceutical Sciences, University of Padova, Via Marzolo 5, 30039 Padova, Italy
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Zhu LJ, Zhuang CL, Lei N, Sheng CQ, Guo W, Miao ZY, Liu WF, Yao JZ, Zhang WN. Synthesis and Pharmacological Evaluation of Novel Homocamptothecin-Dihydropyridine Derivative Conjugates as Potent Topoisomerase I Inhibitors. Aust J Chem 2011. [DOI: 10.1071/ch11091] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Homocamptothecins (hCPT) represent a new generation of antitumour agents targeting DNA topoisomerase I. The expanded seven-membered lactone E-ring that characterizes hCPT enhances the plasma stability of the drug and reinforces the inhibition of topoisomerase I (Topo I) compared with conventional six-membered CPT. In an attempt to improve the antitumour activity of hCP, a series of novel hCPT derivatives conjugating with dihydropyridine derivates were designed and synthesized based on a synthetic route that couples 7-formylhomocamptothecin with different dihydropyridine derivates. Most of the synthesized compounds exhibited good cytotoxic activity on tumour cell line A549, MDA-MB-435, and HCT116. Furthermore, this class of compounds showed superior Topo I inhibition activity comparable to or higher than CPT.
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Zhang YQ, Zhang HJ, Zhang J, Wang J, Yao JZ, Zhu LJ, Zhuang CL, Wang SZ, Dong GQ, Sheng CQ, Miao ZY, Zhang WN. Antitumor Activities and Structure - Activity Relationship of Phosphotriester Derivatives of Homocamptothecin Based on a Semisynthetic Route. Aust J Chem 2011. [DOI: 10.1071/ch11315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Based on a new semisynthetic route, a series of phosphotriester 7-alkyl-homocamptothecin derivatives are designed and synthesized. Cytotoxic activity assays show that compounds 12a and 14c with a methyl in position C7 of the homocamptothecin are more potent than the other derivatives and the positive drug irinotecan against A-549, MCF-7, and LOVO cell lines. Moreover, compound 14c shows potent tumour inhibitory activity in a Colo205 xenograft model.
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21
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Duncton MAJ. Minisci reactions: Versatile CH-functionalizations for medicinal chemists. MEDCHEMCOMM 2011. [DOI: 10.1039/c1md00134e] [Citation(s) in RCA: 426] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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22
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Li YY, Chen SW, Yang LM, Wang RR, Pang W, Zheng YT. The anti-HIV actions of 7- and 10-substituted camptothecins. Molecules 2009; 15:138-48. [PMID: 20110878 PMCID: PMC6256925 DOI: 10.3390/molecules15010138] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2009] [Revised: 12/18/2009] [Accepted: 12/21/2009] [Indexed: 11/16/2022] Open
Abstract
Camptothecin (CPT), a traditional anti-tumor drug, has been shown to possess anti-HIV-1 activity. To increase the antiviral potency, the anti-HIV activities of two CPT derivatives, 10-hydroxy-CPT and 7-hydroxymethyl-CPT, were evaluated in vitro. The therapy index (TI) of CPT, 10-hydroxy-CPT and 7-hydroxymethyl-CPT against HIV-1IIIB in C8166 were 24.2, 4.2 and 198.1, and against clinical isolated strain HIV-1KM018 in PBMC were 10.3, 3.5 and 66.0, respectively. While the TI of CPT, 10-hydroxy-CPT and 7-hydroxymethyl-CPT against HIV-2CBL-20 were 34.5, 10.7 and 317.0, respectively, and the TI of the three compounds against HIV-2ROD showed the similar values. However, when the antiviral mechanisms were considered, we found there was no inhibition of 7-hydroxymethyl-CPT on viral cell-to-cell transmission, and was no inhibition on reverse transcriptase, protease or integrase in cell-free systems. 7-Hydroxymethyl-CPT showed no selective killing of chronically infected cells after 3 days of incubation. In conclusion, 7-hydroxymethyl-CPT showed more potent anti-HIV activity, while 10-hydroxy-CPT had less efficient activity, compared with the parent CPT. Though the antiviral mechanisms remain to be further elucidated; the modification of -OH residues at C-7 of CPT could enhance the antiviral activity, while of -OH residues at C-10 of CPT had decreased the antiviral activity, which provides the preliminary modification strategy for anti-viral activities enhancement of this compound.
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Affiliation(s)
- Yu-Ye Li
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
- Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
- The First Affiliated Hospital of Kunming Medical College, Kunming, Yunnan 650032, China
- Yunnan Institute of Dermatology & Venereology, Kunming, Yunnan 650032, China
| | - Shi-Wu Chen
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
- Authors to whom correspondence should be addressed; E-Mails: (Y.-T.Z.); (S.-W.C.); Tel./Fax: +86 871 5195684
| | - Liu-Meng Yang
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
| | - Rui-Rui Wang
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
| | - Wei Pang
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
| | - Yong-Tang Zheng
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
- Authors to whom correspondence should be addressed; E-Mails: (Y.-T.Z.); (S.-W.C.); Tel./Fax: +86 871 5195684
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23
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7-Cycloalkylcamptothecin derivatives: Preparation and biological evaluation. Bioorg Med Chem Lett 2009; 19:4107-9. [DOI: 10.1016/j.bmcl.2009.06.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2009] [Revised: 05/26/2009] [Accepted: 06/02/2009] [Indexed: 11/22/2022]
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24
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Basili S, Moro S. Novel camptothecin derivatives as topoisomerase I inhibitors. Expert Opin Ther Pat 2009; 19:555-74. [DOI: 10.1517/13543770902773437] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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25
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Samorì C, Guerrini A, Varchi G, Fontana G, Bombardelli E, Tinelli S, Beretta GL, Basili S, Moro S, Zunino F, Battaglia A. Semisynthesis, Biological Activity, and Molecular Modeling Studies of C-Ring-Modified Camptothecins. J Med Chem 2009; 52:1029-39. [DOI: 10.1021/jm801153y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cristian Samorì
- Istituto CNR per la Sintesi Organica e Fotoreattività “I.S.O.F.”, Area della Ricerca di Bologna, Via P. Gobetti 101, 40129 Bologna, Italy, Indena SPA, Viale Ortles 12, 20139 Milano, Italy, Diparitmento di Oncologia Sperimentale e Laboratori, Fondazione IRCCS Istituto Nazionale Tumori, 20133 Milano, Italy, and Molecular Modelling Section (MMS), Dipartimento di Scienze Farmaceutiche, Università di Padova, Via Marzolo 5, I-35131 Padova, Italy
| | - Andrea Guerrini
- Istituto CNR per la Sintesi Organica e Fotoreattività “I.S.O.F.”, Area della Ricerca di Bologna, Via P. Gobetti 101, 40129 Bologna, Italy, Indena SPA, Viale Ortles 12, 20139 Milano, Italy, Diparitmento di Oncologia Sperimentale e Laboratori, Fondazione IRCCS Istituto Nazionale Tumori, 20133 Milano, Italy, and Molecular Modelling Section (MMS), Dipartimento di Scienze Farmaceutiche, Università di Padova, Via Marzolo 5, I-35131 Padova, Italy
| | - Greta Varchi
- Istituto CNR per la Sintesi Organica e Fotoreattività “I.S.O.F.”, Area della Ricerca di Bologna, Via P. Gobetti 101, 40129 Bologna, Italy, Indena SPA, Viale Ortles 12, 20139 Milano, Italy, Diparitmento di Oncologia Sperimentale e Laboratori, Fondazione IRCCS Istituto Nazionale Tumori, 20133 Milano, Italy, and Molecular Modelling Section (MMS), Dipartimento di Scienze Farmaceutiche, Università di Padova, Via Marzolo 5, I-35131 Padova, Italy
| | - Gabriele Fontana
- Istituto CNR per la Sintesi Organica e Fotoreattività “I.S.O.F.”, Area della Ricerca di Bologna, Via P. Gobetti 101, 40129 Bologna, Italy, Indena SPA, Viale Ortles 12, 20139 Milano, Italy, Diparitmento di Oncologia Sperimentale e Laboratori, Fondazione IRCCS Istituto Nazionale Tumori, 20133 Milano, Italy, and Molecular Modelling Section (MMS), Dipartimento di Scienze Farmaceutiche, Università di Padova, Via Marzolo 5, I-35131 Padova, Italy
| | - Ezio Bombardelli
- Istituto CNR per la Sintesi Organica e Fotoreattività “I.S.O.F.”, Area della Ricerca di Bologna, Via P. Gobetti 101, 40129 Bologna, Italy, Indena SPA, Viale Ortles 12, 20139 Milano, Italy, Diparitmento di Oncologia Sperimentale e Laboratori, Fondazione IRCCS Istituto Nazionale Tumori, 20133 Milano, Italy, and Molecular Modelling Section (MMS), Dipartimento di Scienze Farmaceutiche, Università di Padova, Via Marzolo 5, I-35131 Padova, Italy
| | - Stella Tinelli
- Istituto CNR per la Sintesi Organica e Fotoreattività “I.S.O.F.”, Area della Ricerca di Bologna, Via P. Gobetti 101, 40129 Bologna, Italy, Indena SPA, Viale Ortles 12, 20139 Milano, Italy, Diparitmento di Oncologia Sperimentale e Laboratori, Fondazione IRCCS Istituto Nazionale Tumori, 20133 Milano, Italy, and Molecular Modelling Section (MMS), Dipartimento di Scienze Farmaceutiche, Università di Padova, Via Marzolo 5, I-35131 Padova, Italy
| | - Giovanni Luca Beretta
- Istituto CNR per la Sintesi Organica e Fotoreattività “I.S.O.F.”, Area della Ricerca di Bologna, Via P. Gobetti 101, 40129 Bologna, Italy, Indena SPA, Viale Ortles 12, 20139 Milano, Italy, Diparitmento di Oncologia Sperimentale e Laboratori, Fondazione IRCCS Istituto Nazionale Tumori, 20133 Milano, Italy, and Molecular Modelling Section (MMS), Dipartimento di Scienze Farmaceutiche, Università di Padova, Via Marzolo 5, I-35131 Padova, Italy
| | - Serena Basili
- Istituto CNR per la Sintesi Organica e Fotoreattività “I.S.O.F.”, Area della Ricerca di Bologna, Via P. Gobetti 101, 40129 Bologna, Italy, Indena SPA, Viale Ortles 12, 20139 Milano, Italy, Diparitmento di Oncologia Sperimentale e Laboratori, Fondazione IRCCS Istituto Nazionale Tumori, 20133 Milano, Italy, and Molecular Modelling Section (MMS), Dipartimento di Scienze Farmaceutiche, Università di Padova, Via Marzolo 5, I-35131 Padova, Italy
| | - Stefano Moro
- Istituto CNR per la Sintesi Organica e Fotoreattività “I.S.O.F.”, Area della Ricerca di Bologna, Via P. Gobetti 101, 40129 Bologna, Italy, Indena SPA, Viale Ortles 12, 20139 Milano, Italy, Diparitmento di Oncologia Sperimentale e Laboratori, Fondazione IRCCS Istituto Nazionale Tumori, 20133 Milano, Italy, and Molecular Modelling Section (MMS), Dipartimento di Scienze Farmaceutiche, Università di Padova, Via Marzolo 5, I-35131 Padova, Italy
| | - Franco Zunino
- Istituto CNR per la Sintesi Organica e Fotoreattività “I.S.O.F.”, Area della Ricerca di Bologna, Via P. Gobetti 101, 40129 Bologna, Italy, Indena SPA, Viale Ortles 12, 20139 Milano, Italy, Diparitmento di Oncologia Sperimentale e Laboratori, Fondazione IRCCS Istituto Nazionale Tumori, 20133 Milano, Italy, and Molecular Modelling Section (MMS), Dipartimento di Scienze Farmaceutiche, Università di Padova, Via Marzolo 5, I-35131 Padova, Italy
| | - Arturo Battaglia
- Istituto CNR per la Sintesi Organica e Fotoreattività “I.S.O.F.”, Area della Ricerca di Bologna, Via P. Gobetti 101, 40129 Bologna, Italy, Indena SPA, Viale Ortles 12, 20139 Milano, Italy, Diparitmento di Oncologia Sperimentale e Laboratori, Fondazione IRCCS Istituto Nazionale Tumori, 20133 Milano, Italy, and Molecular Modelling Section (MMS), Dipartimento di Scienze Farmaceutiche, Università di Padova, Via Marzolo 5, I-35131 Padova, Italy
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Semi-synthesis and biological activity of γ-lactones analogs of camptothecin. Bioorg Med Chem Lett 2008; 18:6441-3. [DOI: 10.1016/j.bmcl.2008.10.074] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2008] [Revised: 10/13/2008] [Accepted: 10/16/2008] [Indexed: 11/22/2022]
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27
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Li DZ, Pan XD, Liu HY, Wu S. Facile synthesis and cytotoxicity of 5-C-alkylates of 20(S)-camptothecins. CHINESE CHEM LETT 2008. [DOI: 10.1016/j.cclet.2008.07.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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28
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Li DZ, Li Y, Chen XG, Zhu CG, Yang J, Liu HY, Pan XD. Synthesis and antitumor activity of heterocyclic acid ester derivatives of 20S-camptothecins. CHINESE CHEM LETT 2007. [DOI: 10.1016/j.cclet.2007.09.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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29
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Meloun M, Bordovská S, Vrána A. The thermodynamic dissociation constants of the anticancer drugs camptothecine, 7-ethyl-10-hydroxycamptothecine, 10-hydroxycamptothecine and 7-ethylcamptothecine by the least-squares nonlinear regression of multiwavelength spectrophotometric pH-titration data. Anal Chim Acta 2007; 584:419-32. [DOI: 10.1016/j.aca.2006.11.049] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2006] [Revised: 11/16/2006] [Accepted: 11/17/2006] [Indexed: 10/23/2022]
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Enzinger PC, Kulke MH, Clark JW, Ryan DP, Kim H, Earle CC, Vincitore MM, Michelini AL, Mayer RJ, Fuchs CS. A phase II trial of irinotecan in patients with previously untreated advanced esophageal and gastric adenocarcinoma. Dig Dis Sci 2005; 50:2218-23. [PMID: 16416165 DOI: 10.1007/s10620-005-3038-2] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2005] [Accepted: 04/12/2005] [Indexed: 12/13/2022]
Abstract
Chemotherapy options for esophagogastric adenocarcinoma remain limited. Irinotecan has demonstrated broad activity in a variety of epithelial malignancies. Forty-six patients with previously untreated, measurable, unresectable, or metastatic esophagogastric adenocarcinoma were enrolled. Patients received irinotecan (125 mg/m2 intravenously over 90 min weekly) for 4 consecutive weeks followed by a 2-week rest. Forty-three patients received at least one treatment and were evaluable for response and toxicity. One complete and five partial responses were observed, for an overall response rate of 14% (95% CI, 4-24%). Median survival for all 43 patients was 6.4 months (95% CI, 4.6-8.2 months). Grade 3 to 4 toxicity included 10 patients (23%) with neutropenia, 13 patients (30%) with late diarrhea, 6 patients (14%) with vomiting, and 6 patients (14%) with fatigue. We conclude that although single-agent irinotecan is an active agent for esophagogastric adenocarcinoma, the schedule utilized in this trial is associated with moderate toxicity. When used as a single-agent, a tri-weekly schedule may be preferable for this patient population.
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Affiliation(s)
- Peter C Enzinger
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA.
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Adams DJ, da Silva MW, Flowers JL, Kohlhagen G, Pommier Y, Colvin OM, Manikumar G, Wani MC. Camptothecin analogs with enhanced activity against human breast cancer cells. I. Correlation of potency with lipophilicity and persistence in the cleavage complex. Cancer Chemother Pharmacol 2005; 57:135-44. [PMID: 16151810 DOI: 10.1007/s00280-005-0007-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2004] [Accepted: 02/28/2005] [Indexed: 10/25/2022]
Abstract
The effect of 7-alkyl substitutions on growth inhibition in seven Camptothecin (CPT) ring systems with various groups at the ten position was evaluated in three human breast cancer cell lines that model (1) hormone-sensitive (MCF-7/wt), (2) hormone insensitive (MDA-MB-231), or (3) alkylator-resistant (MCF-7/4-hc) forms of disease. To assess the impact of persistence of cleavage complexes on antiproliferative activity, a post-exposure recovery period in drug-free medium was incorporated into the growth inhibition assay. This modification produced on average a twofold reduction in the growth inhibition endpoint (the IC50), suggesting a greater apoptotic response. The results further revealed a three log range in potency from a mean IC50 of 2 nM (7-butyl-10,11-methylenedioxy-CPT) to 2.5 microM (7-bromomethyl-10-hydryoxy-CPT). Increasing 7-alkyl chain length in six of the ten-substituted CPTs enhanced potency, which was directly correlated with persistence of topoisomerase I-induced DNA cleavage complexes in 10-hydroxy, 10-methoxy, and 10,11-methylenedioxy substituted CPTs. Modeling of the binding mode of 7-butyl-10-amino-CPT revealed a direct hydrogen bond contact for the 10-amino to the side chain of Glu-356 of Core Subdomain I of top1 in addition to known contacts found for other camptothecins. More important, residues 350-356 and 425-431 of Core Subdomain I may provide induced fit stabilization to the lipophilic alkyl moiety at the seven position.
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Affiliation(s)
- David J Adams
- Department of Medicine, Duke Comprehensive Cancer Center, Duke University Medical Center, Durham, NC, 27710, USA.
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Brunin T, Hénichart JP, Rigo B. Towards new camptothecins. Part 2: Synthesis of the ABCD ring scaffold substituted by a carboxyl group in the 5-position. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.06.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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34
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Harrowven DC, Sutton BJ. Chapter 2 Radical additions to pyridines, quinolines and isoquinolines. A CRITICAL REVIEW OF THE 2003 LITERATURE PRECEDED BY TWO CHAPTERS ON CURRENT HETEROCYCLIC TOPICS 2005. [DOI: 10.1016/s0959-6380(05)80044-3] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Thomas CJ, Rahier NJ, Hecht SM. Camptothecin: current perspectives. Bioorg Med Chem 2004; 12:1585-604. [PMID: 15028252 DOI: 10.1016/j.bmc.2003.11.036] [Citation(s) in RCA: 305] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2003] [Accepted: 11/28/2003] [Indexed: 01/20/2023]
Abstract
This review provides a detailed discussion of recent advances in the medicinal chemistry of camptothecin, a potent antitumor antibiotic. Two camptothecin analogues are presently approved for use in the clinic as antitumor agents and several others are in clinical trials. Camptothecin possesses a novel mechanism of action involving the inhibition of DNA relaxation by DNA topoisomerase I, and more specifically the stabilization of a covalent binary complex formed between topoisomerase I and DNA. This review summarizes the current status of studies of the mechanism of action of camptothecin, including topoisomerase I inhibition and additional cellular responses. Modern synthetic approaches to camptothecin and several of the semi-synthetic methods are also discussed. Finally, a systematic evaluation of novel and important analogues of camptothecin and their contribution to the current structure-activity profile are considered.
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Affiliation(s)
- Craig J Thomas
- Departments of Chemistry and Biology, University of Virginia, Charlottesville, VA 22901, USA
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Manikumar G, Wadkins RM, Bearss D, Von Hoff DD, Wani MC, Wall ME. Camptothecin analogs with bulky, hydrophobic substituents at the 7-position via a Grignard reaction. Bioorg Med Chem Lett 2004; 14:5377-81. [PMID: 15454230 DOI: 10.1016/j.bmcl.2004.08.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2004] [Revised: 08/02/2004] [Accepted: 08/06/2004] [Indexed: 11/21/2022]
Abstract
By developing a new synthetic procedure for introduction of side chains onto the camptothecin ring system, we were able to achieve the preparation of a number of analogs bearing bulky, hydrophobic groups directly attached to the 7-position. These include 7-tert-butylcamptothecin, 7-benzylcamptothecin and the corresponding 10,11-methylenedioxycamptothecins. This method involves the reaction of an appropriate orthoaminobenzonitrile with various Grignard reagents to give the corresponding orthoaminoketones. Friedlander condensation of the latter with the key tricyclic ketone leads to 7-substituted camptothecin analogs. We report the activity of these compounds as topoisomerase I poisons and their ability to inhibit growth of selected tumor cell lines.
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Affiliation(s)
- Govindarajan Manikumar
- Research Triangle Institute, 3040 Cornwallis Road, Research Triangle Park, NC 27709, USA
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Dallavalle S, Merlini L, Morini G, Musso L, Penco S, Beretta GL, Tinelli S, Zunino F. Synthesis and cytotoxic activity of substituted 7-aryliminomethyl derivatives of camptothecin. Eur J Med Chem 2004; 39:507-13. [PMID: 15183909 DOI: 10.1016/j.ejmech.2004.02.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2003] [Revised: 02/25/2004] [Accepted: 02/25/2004] [Indexed: 11/30/2022]
Abstract
A series of imines derived from camptothecin-7-aldehyde (CPT-CHO) and aromatic amines were synthesised and tested for their cytotoxicity against tumour cell line H460, that expresses a high level of topoisomerase I. In general ortho-substituted compounds showed higher cytotoxic potency than the corresponding para-substituted imines. This effect was dependent on the nature of the substituent. Structure-activity relationships were studied by calculation of docking energy with a model of the ternary complex camptothecin-DNA-topoisomerase I. The ability of selected compounds to stimulate the topoisomerase I-mediated DNA cleavage and the persistence of the cleavable complex were consistent with the cytotoxic activity.
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Affiliation(s)
- Sabrina Dallavalle
- Dipartimento di Scienze Molecolari Agroalimentari, Sezione di Chimica, Università di Milano, Via Celoria 2, 20133 Milan, Italy.
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39
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Bracher F, Puzik A. β-Carboline alkaloids 9 [1]. Total synthesis of the β-carboline alkaloids arenarine A and (±)arenarine B. J Heterocycl Chem 2004. [DOI: 10.1002/jhet.5570410206] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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40
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Das B, Srinivas KVNS, Mahender I, Ravindranath N, Ramesh C. A Convenient Method for the Preparation of 7-Cyanocamptothecins and 7-Cyanomappicine Ketones1. SYNTHETIC COMMUN 2004. [DOI: 10.1081/scc-120027253] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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41
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Pan XD, Han R, Sun PY. Regioselective synthesis and cytotoxicities of camptothecin derivatives modified at the 7-, 10- and 20-positions. Bioorg Med Chem Lett 2003; 13:3739-41. [PMID: 14552770 DOI: 10.1016/j.bmcl.2003.08.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A series of 7-acyloxymethylcamptothecin and 20-O-acyl-7-acyloxymethylcamptothecin derivatives were regioselectively prepared on different solvents. 7-Acyloxymethylcamptothecins possess more efficacy than 20-O-acyl-7-acyloxymethylcamptothecins against six human cancer cell lines in vitro.
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Affiliation(s)
- Xian-dao Pan
- Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.
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Du W. Towards new anticancer drugs: a decade of advances in synthesis of camptothecins and related alkaloids. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)01203-1] [Citation(s) in RCA: 172] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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43
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Malecki N, Houssin R, Héanichart JP, Couturier D, Petra F, Legentil L, Rigo B. Studies on pyrrolidinones. Synthesis of new α-pyridones derivatives. J Heterocycl Chem 2003. [DOI: 10.1002/jhet.5570400105] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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44
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Arimondo PB, Boutorine A, Baldeyrou B, Bailly C, Kuwahara M, Hecht SM, Sun JS, Garestier T, Hélène C. Design and optimization of camptothecin conjugates of triple helix-forming oligonucleotides for sequence-specific DNA cleavage by topoisomerase I. J Biol Chem 2002; 277:3132-40. [PMID: 11724801 DOI: 10.1074/jbc.m110181200] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
To achieve a sequence-specific DNA cleavage by topoisomerase I, derivatives of the antitumor drug camptothecin have been covalently linked to triple helix-forming oligonucleotides that bind in a sequence-specific manner to the major groove of double-helical DNA. Triplex formation at the target sequence positions the drug selectively at the triplex site, thereby stimulating topoisomerase I-mediated DNA cleavage at this site. In a continuous effort to optimize this strategy, a broad set of conjugates consisting of (i) 16-20-base-long oligonucleotides, (ii) alkyl linkers of variable length, and (iii) camptothecin derivatives substituted on the A or B quinoline ring were designed and synthesized. Analysis of the cleavage sites at nucleotide resolution reveals that the specificity and efficacy of cleavage depends markedly on the length of both the triple-helical structure and the linker between the oligonucleotide and the poison. The optimized hybrid molecules induced strong and highly specific cleavage at a site adjacent to the triplex. Furthermore, the drug-stabilized DNA-topoisomerase I cleavage complexes were shown to be more resistant to salt-induced reversal than the complexes induced by camptothecin alone. Such rationally designed camptothecin conjugates could provide useful antitumor drugs directed selectively against genes bearing the targeted triplex binding site. In addition, they represent a powerful tool to probe the molecular interactions in the DNA-topoisomerase I complex.
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Affiliation(s)
- Paola B Arimondo
- Laboratoire de Biophysique, UMR 8646 CNRS, Muséum National d'Histoire Naturelle, INSERM U201, 43 rue Cuvier, 75231 Paris cedex 05, France.
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Hashimoto K, Higashibayashi S, Mori T, Shinko K, Nakata M. Synthetic Studies on Thiostrepton Family of Peptide Antibiotics: Synthesis of the Tetrasubstituted Dihydroquinoline Portion of Siomycin D1. HETEROCYCLES 2002. [DOI: 10.3987/com-01-9375] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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46
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Dallavalle S, Ferrari A, Merlini L, Penco S, Carenini N, De Cesare M, Perego P, Pratesi G, Zunino F. Novel cytotoxic 7-iminomethyl and 7-aminomethyl derivatives of camptothecin. Bioorg Med Chem Lett 2001; 11:291-4. [PMID: 11212094 DOI: 10.1016/s0960-894x(00)00649-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
A series of new 7-iminomethyl derivatives of camptothecin were obtained from camptothecin-7-aldehyde and aromatic, alicyclic and aliphatic amines. Their hydrogenation led to the corresponding amines. All the imines and the less polar amines showed a marked increase of the cytotoxic activity against H460 non-small lung carcinoma cell line, with respect to topotecan. The lipophilicity of the substituent in position 7 of camptothecin seems to play an important role for cytotoxic potency. The 7-phenyliminomethyl derivative showed efficacy comparable to topotecan in vivo against NSCLC H460 xenografted in athymic nude mice.
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Affiliation(s)
- S Dallavalle
- Dipartimento di Scienze Molecolari Agroalimentari, Sezione di Chimica, Università di Milano, Italy
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Dumas C, Kan-Fan C, Royer J, Husson HP. Oxidation of the CDE Rings of Pentacyclic Quinoline Compounds Derived from Tetrahydroalstonine. European J Org Chem 2000. [DOI: 10.1002/1099-0690(200011)2000:21<3601::aid-ejoc3601>3.0.co;2-m] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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48
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Ahn SK, Choi NS, Jeong BS, Kim KK, Journ DJ, Kim JK, Lee SJ, Kim JW, Hong C, Jew SS. Practical synthesis of (S)-7-(2-isopropylamino)ethylcamptothecin hydrochloride, potent topoisomerase I inhibitor. J Heterocycl Chem 2000. [DOI: 10.1002/jhet.5570370519] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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49
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Subrahmanyam D, Sarma VM, Venkateswarlu A, Sastry TV, Srinivas AS, Krishna CV, Deevi DS, Kumar SA, Babu MJ, Damodaran NK. Novel C-ring analogues of 20(S)-camptothecin. Part 3: synthesis and their in vitro cytotoxicity of A-, B- and C-ring analogues. Bioorg Med Chem Lett 2000; 10:369-71. [PMID: 10714502 DOI: 10.1016/s0960-894x(00)00005-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Several 5-substituted alkoxy 20(S)-camptothecin analogues having A- and B-ring substituents were prepared via semi-synthesis. Most of these compounds were found to exhibit potent anti-cancer activity based on their in vitro cytotoxicity data obtained against human tumor cell lines.
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Affiliation(s)
- D Subrahmanyam
- Natural Products Division, Dr. Reddy's Research Foundation, Hyderabad, AP, India.
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50
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Subrahmanyam D, Sarma VM, Venkateswarlu A, Sastry TV, Kulakarni AP, Rao DS, Reddy KV. In vitro cytotoxicity of 5-aminosubstituted 20(S)-camptothecins. Part 1. Bioorg Med Chem 1999; 7:2013-20. [PMID: 10530950 DOI: 10.1016/s0968-0896(99)00130-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A number of 5-aminosubstituted 20(S)-camptothecin analogues were prepared via semi-synthesis starting from 20(S)-camptothecin and 9-methoxy 20(S)-camptothecin. In vitro anti-cancer activity of these analogues was determined using 60 human tumor cell line assay. Although water solubility of most of these compounds was improved compared to 20(S)-camptothecin, their anti-cancer activity was considerably diminished. However, only smaller substituents such as methylamine or hydroxylamine as present in 8s and 8t, respectively, showed good activity with improved water solubility.
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Affiliation(s)
- D Subrahmanyam
- Natural Products Division, Dr Reddy's Research Foundation, Miyapur, Hyderabad, AP, India
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