Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine, Texas A&M University, College Station, TX, USA.
Anticancer Res. 2011 Nov;31(11):3799-807.
We hypothesized that the anticancer activity of cannabinoids was linked to induction of phosphatases.
The effects of cannabidiol (CBD) and the synthetic cannabinoid WIN-55,212 (WIN) on LNCaP (prostate) and SW480 (colon) cancer cell proliferation were determined by cell counting; apoptosis was determined by cleavage of poly(ADP)ribose polymerase (PARP) and caspase-3 (Western blots); and phosphatase mRNAs were determined by real-time PCR. The role of phosphatases and cannabinoid receptors in mediating CBD- and WIN-induced apoptosis was determined by inhibition and receptor knockdown.
CBD and WIN inhibited LNCaP and SW480 cell growth and induced mRNA expression of several phosphatases, and the phosphatase inhibitor sodium orthovanadate significantly inhibited cannabinoid-induced PARP cleavage in both cell lines, whereas only CBD-induced apoptosis was CB1 and CB2 receptor-dependent.
Cannabinoid receptor agonists induce phosphatases and phosphatase-dependent apoptosis in cancer cell lines; however, the role of the CB receptor in mediating this response is ligand-dependent.
我们假设大麻素的抗癌活性与磷酸酶的诱导有关。
通过细胞计数来确定大麻二酚 (CBD) 和合成大麻素 WIN-55,212 (WIN) 对 LNCaP(前列腺)和 SW480(结肠)癌细胞增殖的影响;通过多聚(ADP-核糖)聚合酶 (PARP) 和半胱天冬酶-3 (Western blot) 的切割来确定细胞凋亡;通过实时 PCR 确定磷酸酶 mRNA。通过抑制和受体敲低来确定磷酸酶和大麻素受体在介导 CBD 和 WIN 诱导的细胞凋亡中的作用。
CBD 和 WIN 抑制了 LNCaP 和 SW480 细胞的生长,并诱导了几种磷酸酶的 mRNA 表达,而磷酸酶抑制剂正钒酸钠在两种细胞系中均显著抑制了大麻素诱导的 PARP 切割,而只有 CBD 诱导的细胞凋亡依赖于 CB1 和 CB2 受体。
大麻素受体激动剂在癌细胞系中诱导磷酸酶和磷酸酶依赖性细胞凋亡;然而,CB 受体在介导这种反应中的作用是配体依赖性的。