Résumé
In this study, one immortalized human normal prostatic epithelial cell line (BPH) and four human prostate cancer cell lines (LNCaP, 22Rv1, PC-3, and DU-145) were treated with Ganoderma Lucidum triterpenoids (GLT) at different doses and for different time periods. Cell viability, apoptosis, and cell cycle were analyzed using flow cytometry and chemical assays. Gene expression and binding to DNA were assessed using real-time PCR and Western blotting. It was found that GLT dose-dependently inhibited prostate cancer cell growth through induction of apoptosis and cell cycle arrest at G1 phase. GLT-induced apoptosis was due to activation of Caspases-9 and -3 and turning on the downstream apoptotic events. GLT-induced cell cycle arrest (mainly G1 arrest) was due to up-regulation of p21 expression at the early time and down-regulation of cyclin-dependent kinase 4 (CDK4) and E2F1 expression at the late time. These findings demonstrate that GLT suppresses prostate cancer cell growth by inducing growth arrest and apoptosis, which might suggest that GLT or Ganoderma Lucidum could be used as a potential therapeutic drug for prostate cancer.
Sujets)
Humains , Mâle , Antinéoplasiques d'origine végétale , Pharmacologie , Apoptose , Caspase-3 , Génétique , Métabolisme , Caspase-9 , Génétique , Métabolisme , Lignée cellulaire tumorale , Survie cellulaire , Cycline D1 , Génétique , Métabolisme , Kinase-4 cycline-dépendante , Génétique , Métabolisme , Inhibiteur p21 de kinase cycline-dépendante , Génétique , Métabolisme , Relation dose-effet des médicaments , Facteur de transcription E2F1 , Génétique , Métabolisme , Points de contrôle de la phase G1 du cycle cellulaire , Génétique , Régulation de l'expression des gènes tumoraux , Nucléosomes , Métabolisme , Anatomopathologie , Extraits de plantes , Chimie , Prostate , Métabolisme , Anatomopathologie , Reishi , Chimie , Transduction du signal , Triterpènes , PharmacologieRésumé
Oxidative stress is implicated in male infertility and significantly higher reactive oxygen species are detected in 25% of infertile males. Although different agents of various alternative medicines, including traditional Chinese medicine, have been tried with varying success, evidence remains limited on whether and how much herbs or supplements might help increase the anti-oxidant ability of the sperm. This study examined the anti-oxidative effects of icariin, a flavonoid isolated from Herba Epimedii, on the human sperm. We prepared the FeSO4/H2O2-damaged human sperms, which were co-cultured with icariin in vitro, and then observed the changes of the sperm by employing Raman micro-spectroscopy. The results showed that Raman mapping with a 514 nm excitation laser allowed clear differentiation of the nucleus, neck, and, in particular, the mitochondria-rich middle piece of a human sperm cell. The effect of icariin on different organelles of the sperm was quantified by localized spectral Raman signatures obtained within milli-seconds, and icariin could keep the "Raman fingerprint" of the human sperm the same as the control groups, suggesting that icariin could protect the human sperm from being damaged by FeSO4/H2O2. Icariin may serve as a tonifying and replenishing agent of herbal origin for enhancing reproductive functions.
Sujets)
Humains , Mâle , Cellules cultivées , Médicaments issus de plantes chinoises , Pharmacologie , Composés du fer II , Pharmacologie , Flavonoïdes , Pharmacologie , Cytométrie en flux , Peroxyde d'hydrogène , Pharmacologie , L-Lactate dehydrogenase , Métabolisme , Malonaldéhyde , Métabolisme , Oxydants , Pharmacologie , Stress oxydatif , Agents protecteurs , Pharmacologie , Analyse spectrale Raman , Spermatozoïdes , Biologie cellulaire , Métabolisme , Superoxide dismutase , Métabolisme , Facteurs tempsRésumé
Oxidative stress is implicated in male infertility and significantly higher reactive oxygen species are detected in 25% of infertile males. Although different agents of various alternative medicines, including traditional Chinese medicine, have been tried with varying success, evidence remains limited on whether and how much herbs or supplements might help increase the anti-oxidant ability of the sperm. This study examined the anti-oxidative effects of icariin, a flavonoid isolated from Herba Epimedii, on the human sperm. We prepared the FeSO4/H2O2-damaged human sperms, which were co-cultured with icariin in vitro, and then observed the changes of the sperm by employing Raman micro-spectroscopy. The results showed that Raman mapping with a 514 nm excitation laser allowed clear differentiation of the nucleus, neck, and, in particular, the mitochondria-rich middle piece of a human sperm cell. The effect of icariin on different organelles of the sperm was quantified by localized spectral Raman signatures obtained within milli-seconds, and icariin could keep the "Raman fingerprint" of the human sperm the same as the control groups, suggesting that icariin could protect the human sperm from being damaged by FeSO4/H2O2. Icariin may serve as a tonifying and replenishing agent of herbal origin for enhancing reproductive functions.
Résumé
<p><b>OBJECTIVE</b>To observe the effect of oligosaccharides of Morinda officinalis (OMO) on beta-amyloid-induced dementia rats, and study its pharmacological mechanism in treatment of dementia.</p><p><b>METHOD</b>The dementia model rats were established by injecting Abeta25-35 10 microLg into bilateral hippocampus. OMO high-dose (60 mg . kg-1 . d-1) group, OMO low-dose (20 mg . kg-1 . d-1 ) groups, the blank group, the sham operation group and the positive donepezil HC1 group (0. 125 mg kg-1 . d-1) were designed for the experiment. They were continuously administered with drugs at the 15th day after operation for 25 days. Kit microplate method was used to detect the contents of super oxide dismutase (SOD), malondialdehyde (MDA), catalase (CAT), glutathione reductase (GSH-Px), acetylcholine (ACh) , acetylcholinesterase (AChE) and Na+ /K+ -ATPase.</p><p><b>RESULT</b>Compared with the model group, all of administration groups showed higher SOD, CAT and GSH-Px levels, and lower MDA in the brain tissues. Besides, they also showed rise in the activities of ACh and Na+ /K+ -ATPase.</p><p><b>CONCLUSION</b>OMO can ameliorate on beta-amyloid-induced dementia rats by enhancing oxidation resistance, activating brain energy metabolism and improving the injury of cholinergic system.</p>