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1.
Article in Chinese | WPRIM | ID: wpr-928082

ABSTRACT

This study aims to acetylate Rehmannia glutinosa polysaccharides by acetic anhydride method, optimize process parameters and evaluate their antioxidant activity. With the degree of substitution(D_s) as a criterion, the effects of reaction time, acetic anhydride-to-polysaccharides ratio and temperature were investigated. Process parameters were optimized by single-factor experiment and response surface methodology. The infrared spectroscopy(IR) and scanning electron microscopy(SEM) proved the successful acetylation and were employed to preliminarily analyze the structural characteristics of acetylated derivatives. The results showed that the D_s was 0.327 under the optimal technological conditions, including m(acetic anhydride):m(R. glutinosa polysaccharides)=2.70, reaction time 3.0 h and temperature 48 ℃. Further, the antioxidant properties of acetylated derivatives were investigated in vitro and acetylation was found effective to improve the antioxidant activity of R. glutinosa polysaccharides. This study provides a reference for the further development and application of R. glutinosa polysaccharides.


Subject(s)
Acetylation , Antioxidants/pharmacology , Polysaccharides/pharmacology , Rehmannia/chemistry
2.
Article in English | WPRIM | ID: wpr-888799

ABSTRACT

Six new tirucallane-type triterpenoids (1-6), along with ten known triterpenoids, were isolated from methylene chloride extract of the resin of Boswellia carterii Birdw. By the application of the comprehensive spectroscopic data, the structures of the compounds were clarified. The experimental electronic circular dichroism spectra were compared with those calculated, which allowed to assign the absolute configurations. Compounds 5 and 6 possesed a 2, 3-seco tirucallane-type triterpenoid skeleton, which were first reported. Their inhibitory activity against NO formation in LPS-activated BV-2 cells were evaluated. Compound 9 showed appreciable inhibitory effect, with an IC

3.
Acta Pharmaceutica Sinica ; (12): 2419-2425, 2021.
Article in Chinese | WPRIM | ID: wpr-886966

ABSTRACT

italic>α-Glucosidase inhibitors play an important role in the treatment of diabetes. This study established a high-resolution bioassay profiling platform for rapidly screening α-glucosidase inhibitors in natural product extracts. Five α-glucosidase inhibitors were identified from Malus hupehensis, namely, 3-hydroxyphloridzin, quercetin-3-O-β-D-glucopyranoside, phloridzin, avicularin and quercitrin. The establishment and successful application of this platform provides a powerful tool for the efficient discovery of anti-diabetic active ingredients in complex systems.

4.
Article in Chinese | WPRIM | ID: wpr-879092

ABSTRACT

Chemical constituents were isolated and purified from fruiting bodies of Ganoderma calidophilum by various column chromatographic techniques, and their chemical structures were identified through combined analysis of physicochemical properties and spectral data. As a result, 11 compounds were isolated and identified as(24E)-lanosta-8,24-dien-3,11-dione-26-al(1), ganoderone A(2), 3-oxo-15α-acetoxy-lanosta-7,9(11), 24-trien-26-oleic acid(3),(23E)-27-nor-lanosta-8,23-diene-3,7,25-trione(4), ganodecanone B(5), ganoderic aldehyde A(6), 11β-hydroxy-lucidadiol(7), 3,4-dihydroxyacetophenone(8), methyl gentiate(9), ganoleucin C(10), ganotheaecolumol H(11). Among them, compound 1 is a new triterpenoid. The cytotoxic activities of all of the compounds against tumor cell lines were evaluated. The results showed that compounds 1, 3, 4 and 6 showed cytotoxic activity against BEL-7402, with IC_(50) values of 26.55, 11.35, 23.23, 18.66 μmol·L~(-1); compounds 1 and 3-6 showed cytotoxic activity against K562, with IC_(50) values of 5.79, 22.16, 12.16, 35.32, and 5.59 μmol·L~(-1), and compound 4 showed cytotoxic activity against A549, with IC_(50) value of 42.50 μmol·L~(-1).


Subject(s)
Cell Line, Tumor , Fruiting Bodies, Fungal , Ganoderma , Molecular Structure , Triterpenes/pharmacology
5.
Article in Chinese | WPRIM | ID: wpr-846251

ABSTRACT

Astragali Complanati Semen has a long-term history of use as a common Chinese traditional and herbal medicine. Through a herbal textual research on the appellation, origin, efficacy, genuine producing area and counterfeit of Astragali Complanati Semen, the evolution of its appellation underwent three stages of "white terrestris", "Shayuan terrestris", and "Astragali Complanati Semen"; The botanical origin and medicinal part is dried mature seed from Astragalus complanatus of Legume family recorded in the literatures of past dynasties; And the varieties of ancient and modern application are basically the same. Its kidney-nourishing and essence-enriching efficacy has been progressively cleared with clinical application since records began in Bencao Yanyi in the Song dynasty; The genuine producing areas of Astragali Complanati Semen were Shayuan in Shaanxi Province from the Song Dynasty, and gradually moved to Tongguan in Shaanxi Province and Shanxi Province in the Ming and Qing Dynasties. After the founding of new China, it was mainly distributed in Shaanxi Province and then spread to northern adjacent provinces, in which the Tongguan in Shaanxi Province was preferred. Its counterfeits included Mapiao semon, an unknown counterfeit with a hint of green and Astragalus sinicus seed based on herbal literatures published before 1949, and mainly included the seeds of A. sinicus, Crotalaria pallida, Asfraglus chinensis and Astragalus adsurgens after 1949. Based on a systematic herbal textual research, this article takes a radical reform of Astragali Complanati Semen, so as to provide reference for its further development and utilization.

6.
Acta Pharmaceutica Sinica ; (12): 1504-1510, 2020.
Article in Chinese | WPRIM | ID: wpr-823297

ABSTRACT

Natural products have been a major source of leading compounds in drug discovery. How to effectively screen active compounds from complex matrix remains an interesting topic. In this review, we comprehensively summarized advanced liquid chromatography based approaches in natural products screening, including pre-column, on-column and post-column screening methods. Their advantages, disadvantages and prospect are also discussed.

7.
Acta Physiologica Sinica ; (6): 894-904, 2019.
Article in Chinese | WPRIM | ID: wpr-781385

ABSTRACT

Ion channels are a widespread class of membrane proteins that help establish and control cell membrane potential by allowing the passive diffusion of inorganic ions with high specificity through cell membrane. They are widely distributed in various cells and tissues, and their normal structure and function are of fundamental importance for all living organisms. The rapid advances in molecular cloning, protein structure analysis, patch clamp recordings and other technologies have greatly promoted the research on the biophysical and molecular properties of ion channels, and made significant progress in the study of the relationship between ion channels and pathophysiology as well. The immune system is made up of immune cells and organs that work together to protect the body and respond to infection and disease. Remarkably, recent basic and clinical research has revealed that ion channels are frequently and abundantly expressed in immune cells and have crucial roles in immune cell development and immune response. This review summarized recent progress in the roles of ion channels in immune cells, including the expression and regulation of ion channels in immune cells, the effects of ion flux mediated by ion channels on lymphocyte development, and functional roles of ion channels in both innate and adaptive immune responses. We also discussed some unresolved and insufficiently addressed issues in the current research, so as to provide an informative reference for better understanding the functional roles of ion channels in the immune system and further elucidation of their function from a physiological and pathological point of view.


Subject(s)
Cell Membrane , Immunity , Physiology , Ion Channels , Allergy and Immunology , Membrane Proteins , Research
8.
Article in Chinese | WPRIM | ID: wpr-781355

ABSTRACT

Double-root mandibular third molars are the common types of mandibular third molars that are prone to impac-tion. Based on the summary of clinical cases and experience, the commonly used crown-root separation technique is improved as diagonal root separation technique that divides the roots by the line connecting the distal axis angle to the root furcation. This new method improves the efficiency of the operation and reduces surgical trauma. This paper details the surgical method, minimally invasive mechanics, and key points of this technique, compares the technique with the crown-root separation tech-nique, and discusses their joint applications.


Subject(s)
Humans , Mandible , Molar , Molar, Third , Tooth Root , Tooth, Impacted
9.
Article in Chinese | WPRIM | ID: wpr-777962

ABSTRACT

Objective To investigate the blood pressure status of preschool children in urban areas of Qingdao, and to determine the relationship between obesity and blood pressure in preschool children. Methods A stratified cluster sampling method was used to select a total of 13 kindergartens in urban districts of Qingdao. Height, weight, waist circumference, hip circumference and blood pressure of children in three classes were measured. Body mass index (BMI), waist to hip ratio and waist to height ratio were calculated and the relationship between obesity and blood pressure was analyzed. Results The mean values of systolic and diastolic blood pressure in preschool children in urban areas of Qingdao were (95.52±7.66) and (62.78±6.52) mmHg, respectively.The detection rate of hypertension in preschool children was 13.50%. The SBP and DBP were positively correlated with BMI, waist circumference, hip circumference and waist to height ratio. There was a linear regression relationship between body mass index and age and blood pressure. The risk of hypertension in overweight and obese children was 5.191 and 2.824 times of normal body weight, respectively. Conclusions The prevalence of hypertension in preschool children in Qingdao urban areas is high.Overweight and obesity are risk factors for elevated blood pressure.Therefore, while preventing preschool children from obesity, preschool children's blood pressure monitoring and blood pressure monitoring and early intervention of hypertension of preschool children should be implemented.

10.
Article in Chinese | WPRIM | ID: wpr-817669

ABSTRACT

@#【Objective】A full exome sequencing of an early-onset family Alzheimer′s disease (EOFAD) was conduct? ed to identify the mutational sites which may cause diseases. The result of the current study may provide suggestion to genetic counseling and prenatal diagnosis.【Methods】Whole exome sequencing was performed on the family members and software PolyPhen-2 as well as SIFT was employed for hazard prediction (Prediction on functional effects of the missense mutation).【Results】The heterozygous mutation c.758A>G (p.Tyr253Cys) in exon 9 of TTC3 gene had been identified in proband whose mother had been proved with heterozygous mutation c.758A>G. According to the family separation and related bioinformatics analysis, the mutant gene was a possible pathogenic mutation. 【Conclusion】 A new mutation was found of c.758A>G in TTC3 gene within a Chinese EOFAD family and a new mutation to the spectrum of genetic mutation in EOFAD was expanded. The finding provides a significant groundwork for future exploration on the mechanisms underlying EOFAD.

11.
Article in Chinese | WPRIM | ID: wpr-816089

ABSTRACT

OBJECTIVE: To investigate the effect of different interfaces on FiO_2 and CO_2 rebreathing(ViCO_2) during noninvasive positive pressure ventilation. METHODS: The Active Servo Lung respiratory simulation system was used to simulate a hypercapnia COPD patient received NPPV through injection of CO_2 gas from the place closest to the outlet of simulated lung to maintain end-tidal carbon dioxide partial pressure at 80 mmHg,and oxygen delivery during NPPV was simulated by means of injection of 5 L/min oxygen through the hole of interface. FiO_2 and ViCO_2 were integral calculated through the synchronous collect real-time pressure, flow rate, oxygen concentration and CO_2 concentration. The effect of different type and models of interfaces on FiO_2 and ViCO_2 were compared, and the bivariate correlation analysis was applied to investigate the correlation of FiO_2 and ViCO_2. RESULTS: The inner volume, leak volume and leak position of different interfaces were different. The FiO_2 of the oral-nasal mask and nasal mask were significantly different(P<0.05), which were(39.81±9.06)% and(43.91±6.33)%,respectively. The FiO_2 of the different models of interfaces was significantly different(P<0.05), the FiO_2 of the No.4 oral-nasal mask was the lowest(28.29±0.08)%, and the FiO_2 of the No. 10 oral-nasal mask was the highest(53.83±0.63)%. The ViCO_2 of the oral-nasal mask and nasal mask wasn't significantly different(P=0.19), which was(15.26±1.27)mL and(14.79±2.21)mL, respectively. The ViCO_2 of the different models of interfaces was significantly different(P<0.05), the FiO_2 of the No.8 nasal mask was the lowest(12.48±0.29%), and the ViCO_2 of the No. 10 nasal mask was the highest(18.38±0.31)%. There was a significant correlation between FiO_2 and ViCO_2(r=0.41, P<0.05), and the general linear equation was Y=14.51+1.82 X(R~2=0.168). CONCLUSION: Different interfaces have significant effects on FiO_2 and ViCO_2 during NPPV,and FiO_2 and ViCO_2 are positively correlated.

12.
Article in Chinese | WPRIM | ID: wpr-857530

ABSTRACT

OBJECTIVE To explore the inhibition of Compound Kushen Injection (CKI) on the prolif-eration, in vitro migration and in vitro invasion of SMMC-7221 cells and the mechanism. METHODS SMMC-7221 cells were treated with CKI of different dilution percentages (0.0% (cell control), 2.5%, 5.0% and 10.0%) for 24 h. The viability of SMMC-7221 cells was evaluated by MTT assay, while the ability of cell migration and invasion was evaluated by the wound healing and transwell chamber assay, respectively. Cells were treated with 0.0%, 5.0% and 10.0% CKI for 12 or 24 h, before the mRNA and protein levels of NF-kB were detected by RT-PCR and Western blotting, respectively. RESULTS Compared with the cell control group, the survival rates in 2.5%, 5.0% and 10.0% CKI groups were reduced to (92±7)%, (77±5)% (P<0.01) and (56±7)% (P<0.01), the migration rates to (90±7)%, (50±10)% (P<0.01) and (25±5)% (P<0.01), and the invasion rates to (98±7)%, (51 ±10)% (P<0.01) and (20±5)% (P<0.01), respectively. The NF-kB mRNA levels in 5.0% and 10.0% CKI groups were reduced to (42±9)% and (46±10)% of the cell control group (P<0.01) after 12 h treatment of CKI, and the protein levels of NF-kB were reduced to (67±16)% and (27±11)% of cell control group after 24 h treatment with CKI, respectively (P<0.01). CONCLUSION CKI can inhibit the proliferation, migration and invasion of SMMC-7221 cells in vitro, and the mechanism may be related to the inhibition of NF-kB signal pathway.

13.
Chinese Pharmacological Bulletin ; (12): 991-994, 2019.
Article in Chinese | WPRIM | ID: wpr-857209

ABSTRACT

Aim To investigate the effect of cardio-myopeptide on doxorubicin-induced toxicity on H9c2 cardiomyoblasts and its related mechanism. Methods H9c2 cells were respectively pretreated with different concentrations(0, 10, 20, 40 mg ∗ L-1) of cardio-myopeptide for 6 h,8 h, 12 h. Cell viability was determined by MTT assay. The protein expression of caspase-3, Bcl-2, Bax, IGF-1R and IGFBP-3 were detected by Western blot. Results Cardiomyopeptide protected H9c2 cardiomyocytes from doxorubicin induced apoptosis in a dose-and time-dependent manner. The half maximal inhibitory concentration (IC50) was shifted from(1.2 ±0.4) umol • L-1 to(2.3 ±0.2) jimol • L-1 The expression of Bcl-2, IGF-1R was up-regulated , and Bax, IGFBP-3 and caspase-3 decreased in H9c2 cells. Conclusions Cardiomyopeptide could prevent from apoptosis induced by doxorubicin in H9c2 cells via increasing expression of IGF-1R, thus up-reg-ulation of the antiapoptotic protein Bcl-2 and inhibiting caspase-3 activity.

14.
Acta Pharmaceutica Sinica ; (12): 1918-1923, 2018.
Article in Chinese | WPRIM | ID: wpr-780074

ABSTRACT

Traditional Chinese medicine Baitouweng have a long history of application. The pharmacopoeia included dry roots of Pulsatilla chinensis (Bge.) Regel of Ranunculaceae. There are easily confused species in the market circulation, such as P. cernua (Thunb.) Bercht. et Opiz., P. dahurica (Fisch.) Spreng., P. turczaninovii Kryl. et Serg., and P. chinensis (Bge.) Regel var. kissii (Mandl) S. H. Li et Y. H. Huang, etc. In this study, using the method of metagenomics, based on high-throughput sequencing technology, the ITS2 sequence of mixed samples of five species of Baitouweng medicinal materials was sequenced. First, the total DNA extraction of medicinal materials mixing powder, and the ITS2 fragment of total DNA was amplified by PCR. Second, the Illumina MiSeq platform was used to carry out Paired-end sequencing for DNA fragments. Last, using FLASH, QⅡME and GraPhlAn software to arrange and analyze, and clustering analysis with the sequences of uploaded to GenBank by our group in the early stage. The results showed that a total of 53 024 sequences of ITS2 were obtained from the mixed samples, there are 52 295 effective sequences, there are a total of 49 079 of five species of medicinal materials of P. Miller. After the representative sequences and the sequence of uploaded to GenBank by our group in the early stage were clustering analysis, 5 species of Baitouweng medicinal materials were clustered into one branch separately, presenting monophyletic. The results showed that using the high-throughput sequencing technology, using ITS2 sequence as DNA barcode, the mix powder of 5 species of Baitouweng medicinal materials could be effectively identified. It provides a new method and thought for the origin identification of mixed Chinese medicinal materials.

15.
Acta Pharmaceutica Sinica ; (12): 1565-1570, 2018.
Article in Chinese | WPRIM | ID: wpr-780034

ABSTRACT

UDP-glycosyltransferase PgUGT74AE2 from Panax ginseng can transfer a glucose moiety to the free C-3 hydroxyl of protopanaxadiol (PPD) to produce ginsenoside Rh2. However, no report demonstrates that PgUGT74AE2 can transfer a glucose moiety to the free C-3 hydroxyl of protopanaxatriol (PPT) to produce a PPT-type ginsenoside. In this study, the expression plasmid pET-32a-PgUGT74AE2 was constructed for expression of the recombinant protein and transferred into Escherichia coli Transetta (DE3) to generate the recombinant strain Transetta-PgUGT74AE2. The recombinant enzyme PgUGT74AE2 was expressed by induction of isopropyl-β-D-thiogalactoside (IPTG). An in vitro enzymatic reaction system was established with the recombinant enzyme PgUGT74AE2 and the substrate PPT. PgUGT74AE2 catalyzed the glycosylation of the free C-3 hydroxyl of PPT to produce 3-O-β-D-glucopyranosyl-dammar-24-ene-3β,6α,12β,20S-tetraol, a new PPT-type ginsenoside. This study provides an efficient approach for the biosynthesis of a new PPT-type ginsenoside through in vitro enzymatic reaction, which may pave a way to produce promising lead in drug discovery.

16.
Article in Chinese | WPRIM | ID: wpr-815919

ABSTRACT

To detect the expression level of ICOS on Th9 cells in mice infected with Schistosoma japonicum, and investigate the relation between ICOS signaling and Th9 cell polarization.Twenty-five mice with S. japonicum infection were used as models. IL-9+cells in CD4+ T cells and ICOS+ cells in Th9 cells of the mice were detected by flow cytometry 0, 4, 7, 9 weeks and 12 weeks after the infection.Compared with that 0 week after the infection, the proportion of Th9 cells in CD4+ T cells of the mice significantly increased 4, 7, 9, 12 weeks after the infection (all P < 0.05), and the proportion of ICOS+ cells in Th9 cells also markedly improved (P < 0.05).In S. japonicum infection, the ICOS signaling may have a regulatory effect on Th9 cell polarization.

17.
Article in Chinese | WPRIM | ID: wpr-692279

ABSTRACT

A novel method for determination of methylamines and methylamine-N-oxides in fine particles using solid phase extraction (SPE) coupled with ion chromatography (IC) was developed. The experimental conditions including solid phase extraction and chromatographic condition were optimized. The quartz filter loaded with particulate matter (PM) samples was ultrasonically extracted with 20 mL of methanol and water (1:3,V/V) mixture and the extraction process repeated for another 2 times. After the extraction, a total of 60 mL of extraction solvent was dropped into the extraction equipment in solid phase column. The Agilent AccuBond C18was chosen for enriching the methylamine,dimethylamine,trimethylamine and trimethylamine-N-oxide in fine particles. Under the optimum conditions, the target species on Agilent Accu Bond C18were washed by 0. 5 mL of acetonitrile solution and then concentrated into a constant volume (2 mL) before injecting into IC for analysis. A 250 mm×4 mm id PRP X-200 column was used for the separation of analytes at the temperature of 25oC. The mobile phase was a mixture of acetonitrile solution (3%, V/V) and nitric acid (5 mmol/L) with the flow rate being kept at 1 mL/min. The four aliphatic amine species were fully resolved and the separations were completed within 30 min. The linearity of the four compounds ranged from 0.45 to 1000 μg/kg with the precisions of 2%-4% and the detection limits of 0.002-0.003 μg/m3. The recoveries of four aliphatic amine species in real environmental samples were higher than 90%. This method was successfully applied to the analysis of real fine particle samples collected at Beijing. The concentrations of trimethylamine and methylamine-N-oxides were in the range of 0.01-0.08 μg/m3and 0.02-0.14 μg/m3for Beijing dust and haze samples,respectively.

18.
Article in English | WPRIM | ID: wpr-691371

ABSTRACT

<p><b>OBJECTIVE</b>To study the effects of Astragalus polysaccharide (APS), the primary effective component of the Chinese herb medicine Astragalus membranaceus (frequently used for its anti-hepatic fibrosis effects), on nanoscale mechanical properties of liver sinusoidal endothelial cells (SECs).</p><p><b>METHODS</b>Using endothelial cell medium as the control, 5 experimental groups were established utilizing different concentrations of APS, i.e. 12.5, 25, 50, 100, and 200 μg/mL. By using atomic force microscopy along with a microcantilever modified with a silicon dioxide microsphere as powerful tools, the value of Young's modulus in each group was calculated. SAS 9.1 software was applied to analyze the values of Young's modulus at the pressed depth of 300 nm. Environmental scanning electron microscopy was performed to observe the surface microtopography of the SECs.</p><p><b>RESULTS</b>The value of Young's modulus in each APS experimental group was significantly greater than that of the control group: as APS concentration increased, the value of Young's modulus presented as an increasing trend. The difference between the low-concentration (12.5 and 25 μg/mL) and high-concentration (200 μg/mL) groups was statistically significant (P<0.05), but no significant differences were observed between moderateconcentration (50 and 100 μg/mL) groups versus low- or high-concentration groups (P>0.05). Surface topography demonstrated that APS was capable of increasing the total area of fenestrae.</p><p><b>CONCLUSIONS</b>The values of Young's modulus increased along with increasing concentrations of APS, suggesting that the stiffness of SECs increases gradually as a function of APS concentration. The observed changes in SEC mechanical properties may provide a new avenue for mechanistic research of anti-hepatic fibrosis treatments in Chinese medicine.</p>


Subject(s)
Animals , Astragalus Plant , Chemistry , Biomechanical Phenomena , Elastic Modulus , Endothelial Cells , Cell Biology , Liver , Cell Biology , Microscopy, Atomic Force , Microspheres , Nanotechnology , Polysaccharides , Pharmacology , Rats , Silicon Dioxide , Chemistry , Surface Properties
19.
Article in Chinese | WPRIM | ID: wpr-743040

ABSTRACT

The metastasis is the most important biological characteristic of malignant tumors. Once distant metastasis occurs in the tumor tissue, this usually means that the tumor has entered the advanced stage, so it is difficult to cure with local treatment alone, which is the main cause of death. It has been found that voltage-gated sodium channels (VGSC) are expressed not only in excitable cells but also in many metastatic cells, particularly in certain types of cancer cells and the expression of VGSC is related to cancer migration, invasion and metastasis in vivo. Therefore, this article reviews recent studies on the VGSC in tumor invasion and metastasis.

20.
Article in Chinese | WPRIM | ID: wpr-843619

ABSTRACT

Objective • To evaluate the application effect of the newly updated pediatric critical illness score PRISM on assessing the condition of children with mechanical ventilation after congenital heart disease (CHD). Methods • T test, area under ROC curve and Hosmer-Lemeshow goodness of fit test were used to assess the performance of PRISM . The performance of PRISM was also compared with PRISM III and specific severity of illness scoring system for CHD. Results • 230 children with CHD were included. Reliability among evaluators was good. The discriminatory power (AUC>0.75) and calibration capability (P>0.05) of PRISM , PRISM III and specific score for CHD were tolerable. The results of PRISM evaluation were similar to specific scores for CHDT0-4 and CHDT0-12 (P>0.05). Conclusion • PRISM has been updated to shorten the assessment time and has certain advantages over other tools. It is recommended that nursing staff take it in the prognosis prediction system for critically ill children based on clinical status and practical needs, to detect high-risk children early, and to intervene early to reduce the complications and mortality of children.

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