Your browser doesn't support javascript.
loading
Montrer: 20 | 50 | 100
Résultats 1 - 20 de 47
Filtrer
1.
World J Gastroenterol ; 27(13): 1330-1340, 2021 Apr 07.
Article de Anglais | MEDLINE | ID: mdl-33833486

RÉSUMÉ

BACKGROUND: The factors affecting the short-term and long-term prognosis of hepatocellular carcinoma (HCC) patients with portal vein tumor thrombosis (PVTT) receiving transarterial chemoembolization (TACE) are still unclear. AIM: To clarify the predictors correlated with the short-term and long-term survival of HCC patients with PVTT who underwent TACE. METHODS: The medical records of 181 HCC patients with PVTT who underwent TACE at the Second Affiliated Hospital of Chongqing Medical University from January 2015 to July 2019 were retrospectively analyzed. We explored the short-term and long-term prognostic factors by comparing the preoperative indicators of patients who died and survived within 3 mo and 12 mo after TACE. Multivariate analyses were conducted using logistic regression. The area under the receiver operating characteristic curve (area under curve) was used to evaluate the predictive ability of the factors related to the short-term and long-term prognosis. RESULTS: The median survival time was 4.8 mo (range: 2.5-8.85 mo). The 3 mo, 6 mo, and 12 mo survival rates were 68.5%, 38.7%, and 15.5%, respectively. In multivariable analysis, total bilirubin, sex, and aspartate aminotransferase (AST) were closely linked to short-term survival. When AST ≥ 87 U/L and total bilirubin ≥ 16.15 µmol/L, the 3-mo survival rate after TACE was reduced significantly (P < 0.05). AST had the best predictive ability, followed by total bilirubin, while sex had the worst predictive ability for short-term survival area under curve: 0.763 (AST) vs 0.707 (total bilirubin) vs 0.554 (sex)]. The long-term survival outcome was significantly better in patients with a single lesion than in those with ≥ three lesions (P = 0.009). Patients with massive block HCC had a worse long-term survival than patients with nodular and diffuse HCC (P = 0.001). CONCLUSION: AST, total bilirubin, and sex are independent factors associated with short-term survival. The number of tumors and the gross pathological type of tumor are related to the long-term outcome.


Sujet(s)
Carcinome hépatocellulaire , Chimioembolisation thérapeutique , Tumeurs du foie , Carcinome hépatocellulaire/complications , Carcinome hépatocellulaire/thérapie , Chimioembolisation thérapeutique/effets indésirables , Humains , Tumeurs du foie/complications , Tumeurs du foie/thérapie , Veine porte/imagerie diagnostique , Études rétrospectives , Résultat thérapeutique
2.
Carcinogenesis ; 41(5): 678-688, 2020 07 10.
Article de Anglais | MEDLINE | ID: mdl-31306481

RÉSUMÉ

Upregulation of histone methyltransferase SET domain bifurcated 1 (SETDB1) is associated with poor prognosis in cancer patients. However, the mechanism of oncogenicity of SETDB1 in cancer is hitherto unknown. Here, we show that SETDB1 is upregulated in human colorectal cancer (CRC) where its level correlates with poor clinical outcome. Ectopic SETDB1 promotes CRC cell proliferation, whereas SETDB1 attenuation inhibits this process. Flow cytometry reveals that SETDB1 promotes proliferation by driving the CRC cell cycle from G0/G1 phase to S phase. Mechanistically, SETDB1 binds directly to the STAT1 promoter region resulting in increased STAT1 expression. Functional characterization reveals that STAT1-CCND1/CDK6 axis is a downstream effector of SETDB1-mediated CRC cell proliferation. Furthermore, SETDB1 upregulation is sufficient to accelerate in vivo proliferation in xenograft animal model. Taken together, our results provide insight into the upregulation of SETDB1 within CRC and can lead to novel treatment strategies targeting this cell proliferation-promoting gene.


Sujet(s)
Marqueurs biologiques tumoraux/métabolisme , Prolifération cellulaire , Tumeurs colorectales/anatomopathologie , Cycline D1/métabolisme , Kinase-6 cycline-dépendante/métabolisme , Histone-lysine N-methyltransferase/métabolisme , Facteur de transcription STAT-1/métabolisme , Animaux , Apoptose , Marqueurs biologiques tumoraux/génétique , Mouvement cellulaire , Tumeurs colorectales/génétique , Tumeurs colorectales/métabolisme , Cycline D1/génétique , Kinase-6 cycline-dépendante/génétique , Régulation de l'expression des gènes tumoraux , Histone-lysine N-methyltransferase/génétique , Humains , Mâle , Souris , Souris de lignée BALB C , Souris nude , Facteur de transcription STAT-1/génétique , Cellules cancéreuses en culture , Tests d'activité antitumorale sur modèle de xénogreffe
3.
Drug Des Devel Ther ; 13: 3343-3355, 2019.
Article de Anglais | MEDLINE | ID: mdl-31571835

RÉSUMÉ

OBJECTIVE: To investigate the effects of Chinese herb Danzhi Xiaoyao pills on the pharmacokinetics of venlafaxine and its metabolites O-desmethylvenlafaxine (ODV) and N-desmethylvenlafaxine (NDV) in beagles by using ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). METHODS: Six beagles (half male, half female) were chosen to test, being fasted before the experiment but having free access to drinking water 1 day before being fed drugs. After oral administration of venlafaxine hydrochloride tablets (10.28 mg/kg), the blood samples were collected in succession at different points in time. After 1-week washout period, Danzhi Xiaoyao pills (0.6g/kg) were given through oral administration to the six beagles every morning until the 7th day, venlafaxine hydrochloride tablets (10.28 mg/kg) were given after feeding Danzhi Xiaoyao pills (0.6g/kg) half an hour and blood samples were collected continuously at different points. All samples were analyzed by UPLC-MS/MS, and the main pharmacokinetic parameters of venlafaxine, ODV and NDV were computed by DAS 2.0. RESULTS: The Cmax of the venlafaxine group (control group) and the combination group (experimental group) were (2267.26±252.89) ng/mL and (1542.64±190.73) ng/mL, respectively. The AUC(0-∞) of the two groups were (13,934.79±3609.23) ng·h/mL and (8001.91±2167.58) ng·h/mL, respectively. The ODV Cmax of the two groups were (2253.80±215.81) ng/mL and (2721.37±118.20) ng/mL, and AUC(0-∞) were (13,974.99±2784.04) ng·h/mL and (17,539.44±1894.29) ng·h/mL, respectively. The NDV Cmax of the two groups were (50.98±5.76) ng/mL and (58.74±12.33) ng/mL, and AUC(0-∞) were (179.26±34.94) ng·h/mL and (220.68±51.41) ng·h/mL, respectively. After administration of Danzhi Xiaoyao pills, the Cmax and AUC(0-∞) of venlafaxine decreased significantly, indicating that the plasma exposure of venlafaxine decreased. The increase of Cmax and AUC(0-∞) of ODV and NDV indicated a rise in plasma exposure. CONCLUSION: Danzhi Xiaoyao pills can accelerate the metabolism of venlafaxine in beagles. In clinical, when venlafaxine was co-administrated with Danzhi Xiaoyao pills, dose adjustment of venlafaxine should be taken into account.


Sujet(s)
Médicaments issus de plantes chinoises/pharmacologie , Chlorhydrate de venlafaxine/pharmacocinétique , Animaux , Aire sous la courbe , Chromatographie en phase liquide , Cyclohexanols/sang , Cyclohexanols/pharmacocinétique , Succinate de dèsvenlafaxine/sang , Chiens , Médicaments issus de plantes chinoises/administration et posologie , Femelle , Mâle , Comprimés , Spectrométrie de masse en tandem
4.
Nat Commun ; 10(1): 3981, 2019 09 04.
Article de Anglais | MEDLINE | ID: mdl-31484922

RÉSUMÉ

The diverse expression pattern of CD36 reflects its multiple cellular functions. However, the roles of CD36 in colorectal cancer (CRC) remain unknown. Here, we discover that CD36 expression is progressively decreased from adenomas to carcinomas. CD36 loss predicts poor survival of CRC patients. In CRC cells, CD36 acts as a tumor suppressor and inhibits aerobic glycolysis in vitro and in vivo. Mechanically, CD36-Glypcian 4 (GPC4) interaction could promote the proteasome-dependent ubiquitination of GPC4, followed by inhibition of ß-catenin/c-myc signaling and suppression of downstream glycolytic target genes GLUT1, HK2, PKM2 and LDHA. Moreover, disruption of CD36 in inflammation-induced CRC model as well as ApcMin/+ mice model significantly increased colorectal tumorigenesis. Our results reveal a CD36-GPC4-ß-catenin-c-myc signaling axis that regulates glycolysis in CRC development and may provide an intervention strategy for CRC prevention.


Sujet(s)
Antigènes CD36/génétique , Tumeurs colorectales/génétique , Régulation de l'expression des gènes tumoraux , Glycolyse/génétique , Glypicanes/génétique , Protéines proto-oncogènes c-myc/génétique , bêta-Caténine/génétique , Sujet âgé , Animaux , Antigènes CD36/métabolisme , Cellules Caco-2 , Carcinogenèse/génétique , Lignée cellulaire tumorale , Tumeurs colorectales/métabolisme , Tumeurs colorectales/thérapie , Femelle , Analyse de profil d'expression de gènes/méthodes , Glypicanes/métabolisme , Cellules HCT116 , Cellules HT29 , Humains , Mâle , Souris de lignée BALB C , Souris nude , Adulte d'âge moyen , Protéines proto-oncogènes c-myc/métabolisme , Thérapie par l'interférence par ARN/méthodes , Transduction du signal/génétique , Ubiquitination , Tests d'activité antitumorale sur modèle de xénogreffe/méthodes , bêta-Caténine/métabolisme
5.
Article de Anglais | MEDLINE | ID: mdl-31379966

RÉSUMÉ

OBJECTIVES: The Selaginella moellendorffii prescription (SMP) consists of S. moellendorffii Herba (SM), Smilacis glabrae Rhizoma (SGR), and Plantaginis Semen (PS). It has been commonly used to treat hyperuricemia and acute gouty arthritis as a hospital preparation. This study was aimed at investigating the best compatibility ratio of SMP on hyperuricemia and gouty arthritis and getting better insight of the possible mechanism. Methods. In vitro, anti-inflammatory activity of SMP was evaluated by lipopolysaccharide (LPS) induced RAW264.7 cells. The release of nitric oxide (NO) was screened by Griess assay, and NF-κB p65 and NLRP3 proteins expression was examined by immunofluorescence assay. Then, the levels of creatinine (Cr), blood urea nitrogen (BUN), and uric acid (UA) were detected in mice induced by potassium oxonate, and the paw oedema, inflammatory mediators, and histological examination were analyzed in rats induced by monosodium urate (MSU). HPLC method was employed to investigate the chemical profile of this preparation. Results. In vitro, SMP-3 (the ratio of SMP:SGR:PS was 3:1:1) exhibited the most potent anti-NO production activity without obvious toxicity. This anti-inflammatory effect was associated with suppression of NF-κB p65 nuclear translocation and NLRP3 protein expression. In animal experiments, the levels of BUN and Cr in SMP-3 group were lower than other extract groups, and the level of UA was also remarkably decreased by SMP-3 in hyperuricemic mice (P<0.01). Besides, SMP-3 extract was able to prevent the paw edema, reduce gouty joint inflammatory features, and decrease the levels IL-1ß, PGE-2, IL-8, and NO in gouty arthritis rats. Furthermore, 6-C-ß-D-xylopyranosyl-8-C-ß-D-glucopyranosyl, apigenin, and astilbin were identified from SMP-3 extract. CONCLUSIONS: In summary, SMP-3 may be a potential therapeutic agent for the prevention of hyperuricemic and gout.

7.
Zhongguo Zhong Yao Za Zhi ; 42(18): 3639-3644, 2017 Sep.
Article de Chinois | MEDLINE | ID: mdl-29218954

RÉSUMÉ

Gastrodia elata has been used in China for more than 2 000 years and it is a kind of valuable traditional Chinese medicine. The originrecords of G. elata were Mount Tai of Shandong and and Mount Song of Henan, which began in Wupu Bencao of Wei Jin Dynasties, and Tai'an and its surrounding areas had been the Do-di herbs production areas. But from the beginning of the Republic of China, G. elata origin has undergone major changes, Do-di herbs production areas moved westward to the southwest.In this paper,through literature research and field visits, we studied the formation and changes of Do-di herbs production areas of G. elata. The cultivation history and current main producing area of G. elata was also introduced. On this basis, we profoundly summarized the reasons of Do-di herbs production areas formation and changes from the nature, society, transportation, humanities and germplasm resources.Combining the ancient herbal medicine and the characteristics of modern producing areas, the planting strength of G. elata could be strengthened in the hope of providing reference for the quality evaluation and cultivation of G. elata.


Sujet(s)
Médicaments issus de plantes chinoises/composition chimique , Gastrodia/composition chimique , Plantes médicinales/composition chimique , Chine , Médecine traditionnelle chinoise , Phytothérapie
8.
Oncotarget ; 8(39): 65717-65729, 2017 Sep 12.
Article de Anglais | MEDLINE | ID: mdl-29029466

RÉSUMÉ

Resveratrol and caloric restriction (CR) are the powerful therapeutic options for anti-aging. Here, their comparative effect on longevity-associated gene silencing information regulator (SIRT1) were evaluated in vitro and in vivo. IMR-90 cells treated with 2,2'-azobis (2-amidinopropane) dihydrochloride (AAPH) were applied to establish a cellular senescence model, and rats treated with D-galactose (D-gal) were used as an aging animal model. Resveratrol and CR exhibited similar anti-aging activities, evidenced by inhibiting senescence and apoptosis, and restoring cognitive impairment and oxidative damage. Moreover, they could up-regulate telomerase (TE) activity, increase expressions of SIRT1, forkhead box 3a (Foxo3a), active regulator of SIRT1 (AROS) and Hu antigen R (HuR ), but decrease p53 and deleted in breast cancer 1 (DBC1) levels. However, 10 µM resveratrol in vitro and the high dose group in vivo showed relatively stronger activities of anti-aging and stimulating SIRT1 level than CR. In conclusion, resveratrol and CR showed similar anti-aging activities on SIRT1 signaling, implicating the potential of resveratrol as a CR mimetic.

9.
Carbohydr Polym ; 178: 412-417, 2017 Dec 15.
Article de Anglais | MEDLINE | ID: mdl-29050613

RÉSUMÉ

In this study, a reutilization of caustic lye during cold caustic extraction (i.e., CCE) process to produce high-purity dissolving pulp and high-concentrated hemicellulose solution was proposed. The results showed that the lye can be reused about 12 times for producing high-purity dissolving pulps. With the number of CCE stages of 12, the hemicellulose in the lye can be auto-concentrated to about 37g/L. The alkali efficiency of the modified CCE process was about 6 (or 3) times better than the traditional CCE process with low- (or middle-) consistency of pulps. Therefore, the present process is feasible to be used for the purification of dissolving pulps with a cost-effective manner.

10.
Article de Anglais | MEDLINE | ID: mdl-28250791

RÉSUMÉ

This study was aimed at evaluating the effects of Selaginella moellendorffii Hieron. (SM) on gouty arthritis and getting an insight of the possible mechanisms. HPLC method was developed for chemical analysis. The paw oedema, the neutrophil accumulation, inflammatory mediators, lipid peroxidation, and histopathological changes of the joints were analyzed in gouty arthritis rat model, and the kidney injury and serum urate were detected in hyperuricemic mice. Pharmacokinetic result demonstrated that the main apigenin glycosides might be quantitatively transformed into apigenin in the mammalian body. Among these compounds, the apigenin exhibited the strongest effect on xanthine oxidase (XOD). SM aqueous extract has proved to be active in reducing hyperuricemia in dose-dependent manner, and the levels of blood urea nitrogen (BUN) and creatinine (Cr) in high dose group were decreased significantly as compared with hyperuricemic control group (P < 0.01). The high dose of SM extract could significantly prevent the paw swelling, reduce gouty joint inflammatory features, reduce the release of IL-1ß and TNF-α, lower malondialdehyde (MDA) and myeloperoxidase (MPO) levels, and increase superoxide dismutase (SOD) level (P < 0.01). For the first time, this study provides a rational basis for the traditional use of SM aqueous extract against gout in folk medicine.

11.
Oncol Rep ; 37(4): 2227-2236, 2017 Apr.
Article de Anglais | MEDLINE | ID: mdl-28350090

RÉSUMÉ

Ampelopsis sinica root (ASR) is a known hepatoprotective folk traditional Chinese medicine. The anti­hepatoma activity of ethyl acetate extract from A. sinica root (ASRE) in vitro and in vivo and its possible mechanism were explored. This study was designed to investigate cytotoxicity by MTT assay, induction of apoptosis via Hoechst 33258 staining, scanning electron microscopy and bivariate flow cytometric analysis (Annexin V-FITC/PI), inflammation and apoptosis related genes expression by RT-PCR and p53 protein expression by immunofluorescence assay in HepG2 cells. Then, the antitumor activity in vivo was detected by hepatoma H22 xenograft tumor in mice. The results showed that ASRE had powerful anti­hepatoma activity in vitro without obvious toxicity on normal cells and could induce HepG2 cell apoptosis. The mechanism may be associated with downregulation of inflammatory cytokines including cyclooxygenase-2, 5-lipoxygenase and FLAP, increase of the ratio of bax/bcl-2, activation caspase-3 and inhibition of survivin, and increased expression of p53 protein. Furthermore, the HPLC assay showed the main compounds of ASRE were gallic acid, catechin and gallic acid ethyl ester. In animal experiments, ASR ethanol extract decreased the tumor weights of hepatoma H22 tumor-bearing mice. Therefore, ASR may be a potential therapeutic agent in the treatment of hepatocellular carcinoma.


Sujet(s)
Acétates/administration et posologie , Ampelopsis/composition chimique , Antinéoplasiques d'origine végétale/administration et posologie , Carcinome hépatocellulaire/traitement médicamenteux , Tumeurs du foie/traitement médicamenteux , Protéine p53 suppresseur de tumeur/génétique , Acétates/pharmacologie , Animaux , Antinéoplasiques d'origine végétale/pharmacologie , Carcinome hépatocellulaire/génétique , Carcinome hépatocellulaire/métabolisme , Lignée cellulaire tumorale , Prolifération cellulaire/effets des médicaments et des substances chimiques , Survie cellulaire/effets des médicaments et des substances chimiques , Régulation de l'expression des gènes tumoraux/effets des médicaments et des substances chimiques , Cellules HepG2 , Humains , Tumeurs du foie/génétique , Tumeurs du foie/métabolisme , Souris , Racines de plante/composition chimique , Protéine p53 suppresseur de tumeur/métabolisme , Tests d'activité antitumorale sur modèle de xénogreffe
12.
Molecules ; 21(1): 85, 2016 Jan 13.
Article de Anglais | MEDLINE | ID: mdl-26771596

RÉSUMÉ

Wood shortages, environmental pollution and high energy consumption remain major obstacles hindering the development of today's pulp and paper industry. Energy-saving and environmental friendly pulping processes are still needed, especially for non-woody materials. In this study, soda-oxygen pulping of bagasse was investigated and a successful soda-oxygen pulping process for bagasse at 100 °C was established. The pulping parameters of choice were under active alkali charge of 23%, maximum cooking temperature 100 °C, time hold at maximum temperature 180 min, initial pressure of oxygen 0.6 MPa, MgSO4 charge 0.5%, and de-pithed bagasse consistency 12%. Properties of the resultant pulp were screened yield 60.9%, Kappa number 14, viscosity 766 dm³/kg, and brightness 63.7% ISO. Similar pulps were also obtained at 110 °C or 105 °C with a cooking time of 90 min. Compared with pulps obtained at higher temperatures (115-125 °C), this pulp had higher screened yield, brightness, and acceptable viscosity, while the delignification degree was moderate. These results indicated that soda-oxygen pulping at 100 °C, the lowest cooking temperature reported so far for soda-oxygen pulping, is a suitable process for making chemical pulp from bagasse. Pulping at lower temperature and using oxygen make it an environmental friendly and energy-saving pulping process.


Sujet(s)
Cellulose/composition chimique , Technologie de la chimie verte/méthodes , Secteur secondaire/méthodes , Papier , Alcalis/composition chimique , Température élevée , Humains , Oxygène/composition chimique , Pression , Viscosité
13.
Zhong Yao Cai ; 39(4): 727-31, 2016 Apr.
Article de Chinois | MEDLINE | ID: mdl-30132310

RÉSUMÉ

Objective: To study the taxonomy and distribution of Chinese medicinal centipedes. Methods: The species of Chinese medicinal centipedes were investigated in the light of their morphology. According to the feature of life, the distribution of centipedes were explored. Results: There were 12 centipede species in China, and seven of them were used for medical, the species could be effectively distinguished by the identification key. It was suggested that their characteristics were related to the climatic factors such as temperature, humidity, altitude and air pressure. Conclusion: The distribution of medicinal centipede is characteristics of "three river system distribution belts" and "three geographical distribution areas". The results provide the basis for the development and application of medicinal centipedes in China.


Sujet(s)
Arthropodes , Altitude , Animaux , Chine , Humidité , Plantes médicinales , Température
14.
Zhong Yao Cai ; 39(1): 48-52, 2016 Jan.
Article de Chinois | MEDLINE | ID: mdl-30079701

RÉSUMÉ

Objective: To analyze the mineral medicine of Chloriti Lapis, Micae Lapis Aureus and Vermiculitum by X-ray diffraction, then to guide the identification and quality assessment of them. Methods: XRD Fourier patterns were collected from powder samples to analyze phase compositions, and to determine the original mineral resources of Chloriti Lapis, Micae Lapis Aureus and Vermiculitum by comparing with their characteristic traits. First derivative + vector normalization and 21 point smoothing were used to pretreat the selected spectrum band from 0. 68 ~ 1. 77 nm. Then the data were analyzed by fuzzy cluster. Results: It was found that the original mineral resource of seven powder samples of Chloriti Lapis was biotite schist belonging to metamorphic mineral. The original mineral resource of three powder samples of high-quality Micae Lapis Aureus was vermiculite biotite schist belonging to metamorphic mineral. The original mineral resources of three powder samples of Vermiculitum were phlogopite and vermiculite phlogopite. Conclusion: The method of X-ray diffraction analysis is accurate and rapid, which can be used for the identification and quality evaluation of Chloriti Lapis, Micae Lapis Aureus and Vermiculitum.


Sujet(s)
Diffraction des rayons X , Silicates d'aluminium , Composés du fer II , Minéraux , Poudres
15.
Zhong Yao Cai ; 39(1): 42-7, 2016 Jan.
Article de Chinois | MEDLINE | ID: mdl-30079700

RÉSUMÉ

Objective: To provide the reference for effective identification of Fluoritum,by using X-ray diffraction technique to analyze Fluoritum samples which had different morphological features. Methods: According to the China Pharmacopeia( 2010 edition),the24 samples of commercial Fluoritum were identified and their contents of Ca F2 were determined. XRD technique was applied to analyze phase compositions and content from Fluoritum samples, to ensure quality, and to summarize the correlation between traits and quality. Results: Sample 1 ~ 7 and 13 were Fluoritum, samples 8 ~ 12 were inferior products which were doped, and sample 14 ~ 24 were counterfeit products. Fluorite was the main phase of Fluoritum, and often accompanying a small amount of quartz. Phase compositions of counterfeit Fluoritum whose impurity content were high were relatively complicated, and the contents of Ca F2 were far below the standards value of the China Pharmacopeia( 2010 edition). Fluoritum were easy to be shattered into tiny sand which were green or purple, hyaline and lustered, with color becoming shallow. Conclusion: By picking to remove impurity, inferior products can be used for medicine. Because impurity content are high and the impurities are difficult to be separated, counterfeit products can not be used for medicine. Characteristics of powder can be used for supplement the identification for Fluoritum. And using XRD technique can accurately identify Fluoritum samples which have different morphological features.


Sujet(s)
Composés du fluor/analyse , Diffraction des rayons X , Chine , Couleur , Poudres , Normes de référence
16.
Zhongguo Zhong Yao Za Zhi ; 41(19): 3528-3536, 2016 Oct.
Article de Chinois | MEDLINE | ID: mdl-28925144

RÉSUMÉ

In order to provide theoretical basis for the rapid identification of mineral traditional Chinese medicines(TCM) with near infrared (NIR)diffuse reflectance spectroscopy, Characteristic NIR spectra of 51 kinds of mineral TCMs were generalized and compared on the basis of the previous research, and the characteristic spectral bands were determined and analyzed by referring to mineralogical and geological literatures. It turned out that the NIR features of mineral TCMs were mainly at 8 000-4 000 cm ⁻¹ wavebands, which can be assigned as the absorption of water, -OH and[CO3 ²â»] and so on. Absorption peaks of water has regularity as follows, the structure water and -OH had a combined peak which was strong and keen-edged around 7 000 cm ⁻¹, the crystal water had two strong peak around 7 000 cm ⁻¹ and 5 100 cm ⁻¹, and water only has a broad peak around 5 100 cm ⁻¹. Due to the differences in the crystal form and the contents of water in mineral TCMs, NIR features of water in mineral TCMs which could be used for identification were different. Mineral TCMs containing sulfate are rich in crystal water, mineral TCMs containing silicate generally had structure water, and mineral TCMs containing carbonate merely had a little of water, so it was reasonable for the use of NIR spectroscopy to classify mineral TCMs with anionic type. In addition, because of the differences in cationic type, impurities, crystal form and crystallinity, mineral TCMs have exclusive NIR features at 4 600-4 000 cm ⁻¹, which can be assigned as Al-OH, Mg-OH, Fe-OH, Si-OH,[CO3 ²â»] and so on. Calcined mineral TCMs are often associated with water and main composition changes, also changes of the NIR features, which could be used for the monitoring of the processing, and to provide references for the quality control of mineral TCMs. The adaptability and limitation of NIR analysis for mineral TCMs were also discussed:the majority of mineral TCMs had noteworthy NIR features which could be used for the NIR analysis. And the NIR features of a few mineral TCMs were inapparent, such as Fluoritum, Realgar and Cinnabar, for which the Raman spectroscopy can be adopted alternatively.


Sujet(s)
Médecine traditionnelle chinoise/normes , Minéraux/analyse , Spectroscopie proche infrarouge , Carbonates/analyse , Silicates/analyse , Analyse spectrale Raman
18.
Article de Anglais | MEDLINE | ID: mdl-25866543

RÉSUMÉ

The antitumor activities of ethyl acetate extracts from Selaginella doederleinii Hieron (SD extracts) in vitro and in vivo and its possible mechanism were investigated. HPLC method was developed for chemical analysis. SD extracts were submitted to 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay on different cells, flow cytometry, and RT-PCR analysis using HepG2 cell and antitumor activity in vivo using H-22 xenograft tumor mice. Six biflavonoids from SD extracts were submitted to molecular docking assay. The results showed that SD extracts had considerable antitumor activity in vitro and in vivo without obvious toxicity on normal cells and could induce cell apoptosis. The mechanisms of tumorigenesis and cell apoptosis induced by SD extracts may be associated with decreasing the ratio of bcl-2 and bax mRNA level, activating caspase-3, suppressing survivin, and decreasing the gene expression of COX-2, 5-LOX, FLAP, and 12-LOX mRNA. The main active component in SD extracts is biflavonoids and some exhibited strong interactions with COX-2, 5-LOX, 12-LOX, and 15-LOX. These results offering evidence of possible mechanisms of SD extracts suppress cell proliferation and promote apoptosis and provide the molecular theoretical basis of clinical application of S. doederleinii for cancer therapy.

19.
Zhongguo Zhong Yao Za Zhi ; 40(18): 3560-6, 2015 Sep.
Article de Chinois | MEDLINE | ID: mdl-26983200

RÉSUMÉ

The aim of this paper is to clarify the mineral origin of traditional Chinese medicine (TCM) Yangqishi and Yinqishi and guide identification of the both, by X-ray diffraction (XRD) Fourier patterns. Morphological identification and conventional physical and chemical analysis wee used to identify 22 batches of Yangqishi and Yinqishi. It used XRD Fourier patterns which has been collected from sample powders to analyze phase composition. It has been found experimentally that the mineral origin of Yinqishi is Talc schist and the mineral origin of Yangqishi is tremolite and actinolite. The results also showed that the method using XRD can get not only an accurate but also rapid identification of Yangqishi and Yinqishi. There are many differences in medicinal properties, efficacy, indications and composition of Yangqishi and Yinqishi, so be careful not to mix them up.


Sujet(s)
Médicaments issus de plantes chinoises/composition chimique , Amiante amphibole/composition chimique , Diffraction des rayons X
20.
Zhongguo Zhong Yao Za Zhi ; 40(18): 3608-15, 2015 Sep.
Article de Chinois | MEDLINE | ID: mdl-26983209

RÉSUMÉ

The aim of this paper is to apply Raman spectroscopy technique to develop rapid quantitative models for five kinds of Traditional Chinese Medicine containing CaCO3. In the experiment, Raman spectras of 67 batch of sample including Otolithum Sciaenae, Galaxeae Os, Ophicalcitum, Calcite, Stalactite and their mixture which had different content of CaCO3 were collected, and the quantitative models were established by using an improved siPLS to optimize the characteristic spectral bands and using the CaCO3 contents which were measured by EDTA titration method as references. Compared with the results by EDTA titration, the established quantitative model for CaCO, content showed a prediction result that the average relative deviation of the prediction results is 2. 71% and the average recovery rate was 100.46%, when the content is between 0.465 4-0.999 7, and when the characteristic spectral bands of 1 290-1 280, 730-714, 700-690, 660-650, 465-460, 455-445, 405-385 cm(-1) had been optimized. The result also showed that the model using Raman spectroscopy and based on an improved siPLS can get a rapid determination for contents of 5 kinds of Traditional Chinese Medicine containing CaCO3.


Sujet(s)
Carbonate de calcium/composition chimique , Médicaments issus de plantes chinoises/composition chimique , Plantes médicinales/composition chimique , Analyse spectrale Raman/méthodes , Méthode des moindres carrés , Modèles statistiques
SÉLECTION CITATIONS
DÉTAIL DE RECHERCHE