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Synthesis and Pharmacological Evolution of Tetrahydroisoquinolines as Anti Breast Cancer Agents.

ABSTRACT: Breast cancer is leading cause of mortality among women, resulting in more than half a million deaths worldwide each year. Unfortunately, the recovery rate of advanced breast cancer by current available drug treatment is till unacceptably low. Chemotherapy is the main stay of cancer treatment and most of the drugs cause general toxicity to any non-proliferating cells, which can severely limit the therapeutic values of these drugs. Tetrahydroisoqinoline derivatives (THIQs) were identified as subtype selective estrogen receptor antagonists/agonists hence, potential therapeutic agents for breast cancer. Substituted THIQs were synthesized and well characterized. Antiproliferative activity against human ER (+) MCF-7 (Breast), ER(-) MDA-MB-231 (breast) and Ishikawa (endometrial) cancer cell lines were studied after 72 hours drug exposure employing CellTiter-Glo assay at concentrations ranging from 0.01-100,000 nM. The activities of these compounds were compared with Tamoxifen (TAM). In-vitro results indicated that most of the compounds showed better activity than TAM. The most active compounds obtained in this study were 6a, 6b, 6d and 6j (IC50=0.63, 0.23; 0.93, 0.21; 043, 0.01; 0.7, 0.02 ?g/ml) against MCF-7 and Ishikawa cell lines, in comparison to Tamoxifen activity (IC50=5.14, 4.55 ?g/ml). The newly synthesized molecules were docked in the active sites of the ER-? (PDB: 3ERT) and ER-? (PDB: 3ERT) crystal structures and probable binding modes of this class of molecules were determined.

SUBMITTER: Gangapuram M

PROVIDER: S-EPMC4267113 | biostudies-literature | 2014 Apr

REPOSITORIES: biostudies-literature

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Synthesis and Pharmacological Evolution of Tetrahydroisoquinolines as Anti Breast Cancer Agents.

Gangapuram Madhavi M Eyunni Suresh S Redda Kinfe K KK

Journal of cancer science & therapy 20140401

Breast cancer is leading cause of mortality among women, resulting in more than half a million deaths worldwide each year. Unfortunately, the recovery rate of advanced breast cancer by current available drug treatment is till unacceptably low. Chemotherapy is the main stay of cancer treatment and most of the drugs cause general toxicity to any non-proliferating cells, which can severely limit the therapeutic values of these drugs. Tetrahydroisoqinoline derivatives (THIQs) were identified as subt ...[more]

PMID: 25525496

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Project description:BackgroundPrevention and treatment of chronic inflammatory diseases require effective and low-toxic medicines. Molecular hybridization is an effective strategy to enhance the biological activity of new compounds. Triterpenoid scaffolds are in the focus of attention owing to their anti-inflammatory, antiviral, antiproliferative, and immunomodulatory activities. Heteroprostanoids have different pleiotropic effects in acute and chronic inflammatory processes.ObjectiveThe study aimed to develop structurally new and low toxic anti-inflammatory agents via hybridization of betulinic acid with azaprostanoic acids.MethodsA series of betulinic acid-azaprostanoid hybrids was synthesized. The synthetic pathway included the transformation of betulin via Jones' oxidation into betulonic acid, reductive amination of the latter and coupling obtained by 3β-amino-3-deoxybetulinic acid with the 7- or 13-azaprostanoic acids and their homo analogues. The hybrids 1-9 were investigated in vivo on histamine-, formalin- and concanavalin A-induced mouse paw edema models and two models of pain - the acetic acid-induced abdominal writhing and the hotplate test. The hybrids were in vitro evaluated for cytotoxic activity on cancer (MCF7, U- 87 MG) and non-cancer humane cell lines.ResultsIn the immunogenic inflammation model, the substances showed a pronounced anti-inflammatory effect, which was comparable to that of indomethacin. In the models of the exudative inflammation, none of the compounds displayed a statistically significant effect. The hybrids produced weak or moderate analgesic effects. All the agents revealed low cytotoxicity on human immortalized fibroblasts and cancer cell lines compared with 3β- amino-3-deoxybetulinic acid and doxorubicin.ConclusionThe results indicate that the principal anti-inflammatory effect of hybrids is substantially provided with the triterpenoid scaffold and in some cases with the azaprostanoid scaffold, but the latter makes a significant contribution to reducing the toxicity of hybrids. Hybrid 1 is of interest as a potent low toxic agent against immune-mediated inflammation.

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Synthesis and Pharmacological Evolution of Tetrahydroisoquinolines as Anti Breast Cancer Agents.

Publications

Synthesis and Pharmacological Evolution of Tetrahydroisoquinolines as Anti Breast Cancer Agents.

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