PMID- 29430288 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201001 IS - 1948-5956 (Print) IS - 1948-5956 (Electronic) VI - 9 IP - 7 DP - 2017 TI - Synthesis and Biological Evaluations of Ring Substituted Tetrahydroisoquinolines (THIQs) as Anti-Breast Cancer Agents. PG - 528-540 LID - 10.4172/1948-5956.1000470 [doi] AB - Breast cancer is a leading cause of mortality among women, resulting in more than half a million deaths worldwide every year. Although chemotherapeutic drugs remain the main stay of cancer treatment, it is observed that toxicity to normal cells poses a limitation to their therapeutic values. Moreover, the patient recovery rate from advanced breast cancer by chemotherapy is still unacceptably low. Tetrahydroisoqinoline derivatives (THIQs) were reported to act as selective subtype estrogen receptor antagonists/agonists and may serve as potential therapeutic agents for breast cancer. In continuation of previous work we systematically synthesized and characterized the tetrahydroisoquinoline (THIQs) analogs. In-vitro antiproliferative activity of new substituted tetrahydroisoquinoline analogs were evaluated against human ER (+) MCF-7 (breast), ER (-) MDA-MB-231 (breast) and Ishikawa (endometrial) cancer cell lines using the CellTiter-Glo luminescent cell viability assay. The most active compounds obtained in this study were 2b, 2i, and 3 g as demonstrated by their activity (IC(50)=0.2 mug/mL, 0.08 mug/mL; 0.61 mug/mL, 0.09 mug/mL; 0.25 mug/mL, 0.11 mug/mL) against MCF-7 and Ishikawa cell lines respectively, in comparison to Tamoxifen activity (IC(50)=3.99 mug/mL, 7.87 mug/ml). The newly synthesized molecules were docked in the active sites of the ER-alpha (PDB: 3ERT), ER-beta (PDB: 1QKN) and alpha-beta tubulin taxol complex (1JFF) crystal structures to determine the probable binding modes (bioactive conformations) of the active compounds. FAU - Eyunni, Suresh Vk AU - Eyunni SV AD - College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, USA. FAU - Gangapuram, Madhavi AU - Gangapuram M AD - College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, USA. FAU - Mochona, Bereket AU - Mochona B AD - College of Science and Technology, Florida A&M University, Tallahassee, FL-32307, USA. FAU - Mateeva, Nelly AU - Mateeva N AD - College of Science and Technology, Florida A&M University, Tallahassee, FL-32307, USA. FAU - Redda, Kinfe K AU - Redda KK AD - College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, USA. LA - eng GR - G12 MD007582/MD/NIMHD NIH HHS/United States GR - P20 MD006738/MD/NIMHD NIH HHS/United States PT - Journal Article DEP - 20170713 PL - United States TA - J Cancer Sci Ther JT - Journal of cancer science & therapy JID - 101526958 PMC - PMC5802351 MID - NIHMS911979 OTO - NOTNLM OT - Antiproliferative activity OT - Breast cancer OT - Ring substituted tetrahydroisoquinolines (THIQs) EDAT- 2018/02/13 06:00 MHDA- 2018/02/13 06:01 PMCR- 2018/02/07 CRDT- 2018/02/13 06:00 PHST- 2018/02/13 06:00 [entrez] PHST- 2018/02/13 06:00 [pubmed] PHST- 2018/02/13 06:01 [medline] PHST- 2018/02/07 00:00 [pmc-release] AID - 10.4172/1948-5956.1000470 [doi] PST - ppublish SO - J Cancer Sci Ther. 2017;9(7):528-540. doi: 10.4172/1948-5956.1000470. Epub 2017 Jul 13.