Résumé
In the present study, three new triterpenoids, 23-hydroxyurs-12, 18-dien-28-oic acid 3β-O-α-L-arabinopyranoside (1), 23-hydroxyurs-12, 18-dien-28-oic acid 3β-O-β-D-glucuronopyranoside-6-O-methyl ester (2), and urs-12, 18-dien-28-oic acid 3β-O-β-D-glucuronopyranoside-6-O-methyl ester (3), and a known triterpenoid, 3β-hydroxy-urs-2, 18-dien-28-oic acid (4, randialic acid B), were isolated from the aerial parts of Ilex cornuta. Their structures were identified by the spectroscopic analyses (IR, ESI-MS, HR-ESI-MS, and 1D and 2D NMR) and chemical reactions. Compound 4 showed significant cell-protective effects against HO-induced H9c2 cardiomyocyte injury. Compounds 1-4 did not show any significant DPPH radical scavenging activity.
Sujets)
Animaux , Rats , Dérivés du biphényle , Métabolisme , Agents cardiovasculaires , Chimie , Pharmacologie , Peroxyde d'hydrogène , Métabolisme , Ilex , Chimie , Structure moléculaire , Myocarde , Biologie cellulaire , Anatomopathologie , Myocytes cardiaques , Picrates , Métabolisme , Parties aériennes de plante , Chimie , Extraits de plantes , Chimie , Pharmacologie , Triterpènes , Chimie , PharmacologieRésumé
Previous studies have indicated that the Ilex genus exhibits antioxidant, neuroprotective, hepatoprotective, and anti-inflammatory activities. However, the pharmacologic action and mechanisms of Ilex cornuta against cardiac diseases have not yet been explored. The present study was designed to investigate the antioxidant and cardioprotective effects of Ilex cornuta root with in vitro and in vivo models. The anti-oxidative effects of the extract of Ilex cornuta root (ICR) were measured by 2, 2-diphenyl-1-picrylhydrazyl (DPPH) free-radical scavenging and MTT assays as well as immunoassay. Furthermore, a rat model of myocardial ischemia was established to investigate the cardioprotective effect of ICR in vivo. Eight compounds were isolated and identified from ICR and exhibited DPPH free-radical scavenging activities. They also could increase cell viability and inhibit morphological changes induced by HO or NaSO in H9c2 cardiomyocytes, followed by increasing the SOD activities and decreasing the MDA and ROS levels. In addition, it could suppress the apoptosis of cardiomyocytes. In the rat model of myocardial ischemia, ICR decreased myocardial infarct size and suppressed the activities of LDH and CK. Furthermore, ICR attenuated histopathological alterations of heart tissues and the MDA levels, while increasing SOD activities in serum. In conclusion, these results suggest that ICR has cardioprotective activity and could be developed as a new food supplement for the prevention of ischemic heart disease.
Sujets)
Animaux , Antioxydants , Métabolisme , Pharmacologie , Utilisations thérapeutiques , Apoptose , Agents cardiovasculaires , Pharmacologie , Utilisations thérapeutiques , Survie cellulaire , Peroxyde d'hydrogène , Métabolisme , Ilex , Malonaldéhyde , Métabolisme , Infarctus du myocarde , Ischémie myocardique , Traitement médicamenteux , Métabolisme , Anatomopathologie , Myocarde , Biologie cellulaire , Anatomopathologie , Myocytes cardiaques , Stress oxydatif , Phytothérapie , Extraits de plantes , Pharmacologie , Utilisations thérapeutiques , Racines de plante , Rat Sprague-Dawley , Espèces réactives de l'oxygène , Métabolisme , Superoxide dismutase , MétabolismeRésumé
<p><b>OBJECTIVE</b>To observe the toxicity of Pulsatilla chinensis (Bunge) Regel saponins (PRS) against Oncomelania hupensis (O. hupensis).</p><p><b>METHODS</b>O. hupensis snails were exposed to 40% and 80% of 24 h LC50 of PRS for 24 h, and then choline esterase (CHE), alanine aminotransferase (ALT), alkaline phosphatase (ALP), lactate dehydrogenase (LDH) activities in cephalopodium and liver of snails were determined. Niclosamide (NIC) was used as the reference molluscicide. Zebra fish lethality test was evaluated to non-target aquatic species of PRS.</p><p><b>RESULTS</b>The molluscicidal activity of PRS (LC50 at 24 h: 0.48 mg/L) was similar to that of NIC (LC50 at 24 h: 0.16 mg/L). Significant alterations about CHE, ALP, and ALT activities both in the cephalopodium and the liver of snails were observed when O. hupensis was exposed to 40% and 80% LC50 of PRS or NIC for 24 h. PRS and NIC could not affect LDH activity in the cephalopodium and the liver. Lower toxicity to fish of PRS was observed up to the highest concentration tested than NIC.</p><p><b>CONCLUSION</b>PRS, as compared with the reference molluscicide NIC, is thought to be used for the control of harmful vector snails safely.</p>
Sujets)
Animaux , Molluscicides , Pharmacologie , Pulsatilla , Chimie , Saponines , Pharmacologie , EscargotsRésumé
Uvaria kweichowensis is a folk nongovernmental herb used to treat cure inflammation and tumour in the Southwest area of China. During the course of our investigation for antitumour agents from the stems of Uvaria kweichowensis, six amides were obtained by means of solvent extraction, chromatography on silica gel and Sephadex LH-20 repeatedly. And their structures were identified as uvariadiamide (1), cepharanone (2), aristololactam A II (3), enterocarpam II (4), aristololactam A Ia (5), and 4,5-dioxodehydroasimilobine (6) on the basis of chemical methods and spectral analyses (EI-MS, 1H NMR, 13C NMR). Among them, compound 1 is a new compound; the other compounds were obtained from this plant for the first time.