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eISSN: 1643-3750

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3,6-diazabicyclo[3.3.1]heptanes Induces Apoptosis and Arrests Cell Cycle in Prostate Cancer Cells

Hongjian Wei, Wenfeng Lian, Chong Wang

(Second Department of Urology, Baoding First Central Hospital, Baoding, Hebei, China (mainland))

Med Sci Monit 2020; 26:e920266

DOI: 10.12659/MSM.920266


BACKGROUND: Prostate cancer, non-cutaneous malignant tumor, is the second common cause of cancer related mortalities in American men and is responsible for 13% of deaths related to cancer. The present study investigated the anti-cancer effects of 3,6-diazabicyclo[3.3.1]heptane on LNCaP and PC3 prostate cancer cells in vitro and on tumor growth in vivo in BALB/C nude mice.
MATERIAL AND METHODS: Reduction of cell viability by 3,6-diazabicyclo[3.3.1]heptane was evaluated by sulphorhodamine-B staining and apoptosis onset using annexin V and propidium iodide (PI) staining. The 2’,7’-dichlorofluorescein-diacetate stain was used for assessment of reactive oxygen species (ROS) formation while as western blotting for analysis of protein expression.
RESULTS: The viability of LNCaP and PC3 cells was reduced significantly (P<0.05) by 3,6-diazabicyclo[3.3.1]heptane in dose-based manner. At 30 µM of 3,6-diazabicyclo[3.3.1]heptane the viability of LNCaP and PC3 cells was reduced to 32 and 28%, respectively. The 3,6-diazabicyclo[3.3.1]heptane treatment increased apoptosis in LNCaP cells to 43.31% at 30 µM. The cell cycle in LNCaP cells was arrested in G1 phase on treatment with 3,6-diazabicyclo[3.3.1]heptane. The expression of cyclin D1 and p21 proteins was significantly increased by 3,6-diazabicyclo[3.3.1]heptane in LNCaP and PC3 cells. The growth of prostate tumor was also suppressed in vivo in mice by 3,6-diazabicyclo[3.3.1]heptane treatment.
CONCLUSIONS: In summary, the study demonstrated that LNCaP and PC3 prostate cancer cell viability is suppressed by 3,6-diazabicyclo[3.3.1]heptane treatment. The suppression of prostate cancer cell viability by 3,6-diazabicyclo[3.3.1]heptane involves apoptosis induction, cell cycle arrest and upregulation of p21 expression. Therefore, 3,6-diazabicyclo[3.3.1]heptane can be a potential chemotherapeutic agent for prostate cancer.

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