From the whole plant of <i>Morina nepalensis</i> var. <i>alba</i> Hand.-Mazz., two new acylated flavonoid glycosides (<b>1</b> and <b>2</b>), together with four known flavonoid glycosides (<b>3-6</b>), were isolated. Their structures were determined to be quercetin 3-<i>O</i>-[2″′-<i>O</i>-(<i>E</i>)-caffeoyl]-α-L-arabinopyranosyl-(1→6)-β-D-galactopyranoside (monepalin A, <b>1</b>), quercetin 3-<i>O</i>-[2″′-<i>O</i>-(<i>E</i>)-caffeoyl]-α-L-arabinopyranosyl-(1→6)-β-D-glucopyranoside (monepalin B, <b>2</b>), quercetin 3-<i>O</i>-α-L-arabinopyranosyl-(1→6)-β-D-galactopyranoside (rumarin, <b>3</b>), quercetin 3-<i>O</i>-β-D-galactopyranoside (<b>4</b>), quercetin 3-<i>O</i>-β-D-glucopyranoside (<b>5</b>) and apigenin 4<sup>′</sup>-<i>O</i>-β-D-glucopyranoside (<b>6</b>). Their structures were determined on the basis of chemical and spectroscopic evidence. Complete assignments of the ¹H and <sup>13</sup>C NMR spectra of all compounds were achieved from the 2D NMR spectra, including H-H COSY, HMQC, HMBC and 2D HMQC-TOCSY spectra. Copyright © 2002 John Wiley & Sons, Ltd.
Two new compounds, deacetylisowortmins A (1) and B (2), were isolated from Talaromyces wortmannii LGT-4. Their structures were established by 1D and 2D NMR spectra, as well as comparison of the experimental and calculated electronic circular dichroism spectra. Monoamine oxidase and acetylcholinesterase inhibitory activities of 1 and 2 were also evaluated.
Two new compounds, deacetylisowortmins A (1) and B (2), were isolated from Talaromyces wortmannii LGT-4. Their structures were established by 1D and 2D NMR spectra, as well as comparison of the experimental and calculated electronic circular dichroism spectra. Monoamine oxidase and acetylcholinesterase inhibitory activities of 1 and 2 were also evaluated.
Two new compounds Talaromycin A (1) and Talaromycin B (2) were isolated from a liquid culture of Talaromyces aurantiacus. The structures of 1 and 2 were elucidated by IR, MS, 1D and 2D NMR spectra and comparison of the experimental and calculated electronic circular dichroism spectra. Additional known compounds (3-6) were also isolated. These compounds were tested for monoamine oxidase, acetylcholinesterase and PI3K inhibitory activity, but showed only weak activity.
Two new compounds Talaromycin A (1) and Talaromycin B (2) were isolated from a liquid culture of Talaromyces aurantiacus. The structures of 1 and 2 were elucidated by IR, MS, 1D and 2D NMR spectra and comparison of the experimental and calculated electronic circular dichroism spectra. Additional known compounds (3-6) were also isolated. These compounds were tested for monoamine oxidase, acetylcholinesterase and PI3K inhibitory activity, but showed only weak activity.
Two new prenylated indole diterpenoids, tolypocladins K and L (1 and 2), together with a known analog terpendole L (3), were isolated from the solid fermentation culture of a mine soil-derived fungus Tolypocladium sp. XL115. Their structures and relative configurations were determined by comprehensive spectroscopic data analysis, as well as by comparison of their NMR data with those related known compounds. Compound 3 exhibited remarkable antibacterial activity against Micrococcus luteus with an MIC value of 6.25 μg/mL, and compounds 1 and 3 displayed moderate antifungal activity selectively against tested strains with MIC values of 25-50 μg/mL.
Nitrogen (N) status has a great impact on methane (CH4) consumption by soils. Modeling studies predicting soil CH4 consumption assume a linear relationship between CH4 uptake and N addition rate. Here, we present evidence that a nonlinear relationship may better characterize changes in soil CH4 uptake with increasing N additions. By conducting a field experiment with eight N-input levels in a Tibetan alpine steppe, we observed a unimodal relationship; CH4 uptake increased at low to medium N levels but declined at high N levels. Environmental and microbial properties jointly determined this response pattern. The generality of the unimodal trend was further validated by two independent analyses: (i) we examined soil CH4 uptake across at least five N-input levels in upland ecosystems across China. A unimodal CH4 uptake-N addition rate relationship was observed in 3 out of 4 cases; and (ii) we performed a meta-analysis to explore the N-induced changes in soil CH4 uptake with increasing N additions across global upland ecosystems. Results showed that the changes in CH4 uptake exhibited a quadratic correlation with N addition rate. Overall, we suggest that the unimodal relationship should be considered in biogeochemistry models for accurately predicting soil CH4 consumption under global N enrichment.
Zuotais regarded as the king of Tibetan medicine. However, the major starting material ofZuotais mercury, which is one very toxic heavy metal. This has aroused serious doubts on the biosafety ofZuotacontaining drugs. In this study, we quantified the Hg contents in fourZuotasamples, monitored the release of Hg in simulated gastric/intestinal juice and evaluated their cytotoxicity to Caco-2 cells. Our results showed that the Hg contents inZuotasamples were in the range of 566–676 mg/g. Fortunately, the release of Hg fromZuotasamples was very low in simulated gastric juice, and much lower in simulated intestinal juice. Direct contact ofZuotawith Caco-2 cells led to dose-dependent cytotoxicity, including activity loss and membrane leakage. The toxicity was closely related to apoptosis, because the caspase 3/7 levels of Caco-2 cells increased after the exposure toZuota. Interestingly,Zuotasamples inhibited the oxidative stress at low concentrations, but the toxicity could be relived by antioxidants. The possible toxicity should be attributed to the cellular uptake ofZuotaparticulates. Beyond the cytotoxicity, significant differences amongZuotasamples from different institutions were observed, suggesting that the preparation process ofZuotahad meaningful influence of its biosafety. The implications to the safety and clinical applications ofZuotaare discussed. [ABSTRACT FROM AUTHOR]
Zuota is regarded as the king of Tibetan medicine. However, the major starting material of Zuota is mercury, which is one very toxic heavy metal. This has aroused serious doubts on the biosafety of Zuota containing drugs. In this study, we quantified the Hg contents in four Zuota samples, monitored the release of Hg in simulated gastric/intestinal juice and evaluated their cytotoxicity to Caco-2 cells. Our results showed that the Hg contents in Zuota samples were in the range of 566-676 mg/g. Fortunately, the release of Hg from Zuota samples was very low in simulated gastric juice, and much lower in simulated intestinal juice. Direct contact of Zuota with Caco-2 cells led to dose-dependent cytotoxicity, including activity loss and membrane leakage. The toxicity was closely related to apoptosis, because the caspase 3/7 levels of Caco-2 cells increased after the exposure to Zuota. Interestingly, Zuota samples inhibited the oxidative stress at low concentrations, but the toxicity could be relived by antioxidants. The possible toxicity should be attributed to the cellular uptake of Zuota particulates. Beyond the cytotoxicity, significant differences among Zuota samples from different institutions were observed, suggesting that the preparation process of Zuota had meaningful influence of its biosafety. The implications to the safety and clinical applications of Zuota are discussed.
BACKGROUND: The primary purpose of this study was to establish the feasibility of a couple-based Vivekananda Yoga (VKC) intervention in lung cancer patients and caregivers. Secondly, we examined preliminary efficacy regarding quality of life (QOL) outcomes. METHOD: In this single-arm feasibility trial, patients with lung cancer undergoing radiotherapy and their caregivers participated in a 15-session VKC program that focused on the interconnectedness of the dyad. We assessed pre-and post-intervention levels of fatigue, sleep disturbances, psychological distress, overall QOL, spirituality, and relational closeness. We tracked feasibility data, and participants completed program evaluations. RESULTS: We approached 28 eligible dyads of which 15 (53%) consented and 9 (60%) completed the intervention. Patients (mean age = 73 years, 63% female, all stage III) and caregivers (mean age = 62 years, 38% female, 63% spouses) completed a mean of 10 sessions and 95.5% of them rated the program as very useful. Paired t tests revealed a significant increase in patients' mental health (d = 0.84; P = .04) and a significant decrease in caregivers' sleep disturbances (d = 1.44; P = .02). Although not statistically significant, for patients, effect sizes for change scores were medium for benefit finding and small for distress (d = 0.65 and 0.37, respectively). For caregivers, medium effects were found for improvement in physical functioning (d = 0.50). CONCLUSION: This novel supportive care program appears to be safe, feasible, acceptable, and subjectively useful for lung cancer patients and their caregivers and lends support for further study.
BACKGROUND: The primary purpose of this study was to establish the feasibility of a couple-based Vivekananda Yoga (VKC) intervention in lung cancer patients and caregivers. Secondly, we examined preliminary efficacy regarding quality of life (QOL) outcomes. METHOD: In this single-arm feasibility trial, patients with lung cancer undergoing radiotherapy and their caregivers participated in a 15-session VKC program that focused on the interconnectedness of the dyad. We assessed pre-and post-intervention levels of fatigue, sleep disturbances, psychological distress, overall QOL, spirituality, and relational closeness. We tracked feasibility data, and participants completed program evaluations. RESULTS: We approached 28 eligible dyads of which 15 (53%) consented and 9 (60%) completed the intervention. Patients (mean age = 73 years, 63% female, all stage III) and caregivers (mean age = 62 years, 38% female, 63% spouses) completed a mean of 10 sessions and 95.5% of them rated the program as very useful. Paired t tests revealed a significant increase in patients' mental health (d = 0.84; P = .04) and a significant decrease in caregivers' sleep disturbances (d = 1.44; P = .02). Although not statistically significant, for patients, effect sizes for change scores were medium for benefit finding and small for distress (d = 0.65 and 0.37, respectively). For caregivers, medium effects were found for improvement in physical functioning (d = 0.50). CONCLUSION: This novel supportive care program appears to be safe, feasible, acceptable, and subjectively useful for lung cancer patients and their caregivers and lends support for further study.
OBJECTIVE: To investigate the xanthones from Tibetan medicine Halenia elliptica and their antioxidant activity.METHODS: Column chromatography over normal phase silica gel, reversed phase silica gel, Sephadex LH-20, and recrystallization techniques were used to isolate and purify constituents from Halenia elliptica. Infrared spectrometry, mass spectrometry, and nuclear magnetic resonance spectrometry were used to identify the structure of compounds. The antioxidant activity was evaluated by measuring the content of malondialdehyde product in mice liver cell microsomal induced by ferrous-cysteine.
RESULTS: Eight xanthones (compound I-VIII) were isolated and identified from the ethyl acetate extract of Halenia elliptica, among which 1,7-dihydroxy-2,3,5-trimethoxyxanthone was a novel compound. Compound I, III at 10 microg/ml and 100 microg/ml could inhibit the production of malondialdehyde in mouse liver microsomes in vitro.
CONCLUSION: Eight xanthones were isolated and they have certain antioxidant activity.
"The ancient art of Tibetan medicine is a veritable treasure in the world annals of medical science. Tibetan medicine evolved over ages, as the Tibetan people accumulated experience struggling against the conditions of the snow plateau, emerging as a unique realm of medicine with a distinct understanding of physiology and pathology and its own methods of diagnosis, treatment and medication. The abundant medicinal herbs that grow on the plateau are the active ingredients in the special medicines Tibetans use to treat patients, which in turn is a precious cultural legacy that is now being passed on to the world. Known for its traditional therapies, Tibetan medicine is remarkably effective and beneficial, and has made great contributions to the overall health of humankind"--Container.
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