Development of an online radioactive xenon gas monitoring system for nuclear facilities / 中国辐射卫生

Objective Nowadays, radioactive xenon isotopes, including 131mXe, 133mXe, 133Xe, and 135Xe, are primarily released into the atmosphere through various reactor operation and major accidents of reactors. To improve the online monitoring capability of xenon in nuclear facilities and their gaseous effluents, a highly sensitive online xenon monitoring system was developed to monitor, warn, and alarm the activity concentration of radioactive xenon. Methods The online monitoring system for radioactive xenon gas in nuclear facilities was established using xenon membrane separation and concentration, xenon high-efficiency selective adsorption, and low-background gamma-ray spectrometry analysis methods. Results Under the operation mode of one-hour sampling and one-hour measuring, the minimum detectable activity concentration of the radioactive xenon online monitoring system for 133Xe was approximately (1.43 ± 0.03) Bq/m3. Conclusion This system can be effectively used for online monitoring of xenon activity concentration in nuclear facilities such as nuclear power plants and isotope production reactors, as well as in gaseous effluents. It helps improve the safety level of personnel, the environment, and nuclear facilities.

Gain deeper insights into traditional Chinese medicines using multidimensional chromatography combined with chemometric approaches / 中草药·英文版

Traditional Chinese medicines (TCMs) possess a rich historical background, unique theoretical framework, remarkable therapeutic efficacy, and abundant resources. However, the modernization and internationalization of TCMs have faced significant obstacles due to their diverse ingredients and unknown mechanisms. To gain deeper insights into the phytochemicals and ensure the quality control of TCMs, there is an urgent need to enhance analytical techniques. Currently, two-dimensional (2D) chromatography, which incorporates two independent separation mechanisms, demonstrates superior separation capabilities compared to the traditional one-dimensional (1D) separation system when analyzing TCMs samples. Over the past decade, new techniques have been continuously developed to gain actionable insights from complex samples. This review presents the recent advancements in the application of multidimensional chromatography for the quality evaluation of TCMs, encompassing 2D-gas chromatography (GC), 2D-liquid chromatography (LC), as well as emerging three-dimensional (3D)-GC, 3D-LC, and their associated data-processing approaches. These studies highlight the promising potential of multidimensional chromatographic separation for future phytochemical analysis. Nevertheless, the increased separation capability has resulted in higher-order data sets and greater demands for data-processing tools. Considering that multidimensional chromatography is still a relatively nascent research field, further hardware enhancements and the implementation of chemometric methods are necessary to foster its robust development.

Medication Ideas for Depression from Wenyang Jieyu Prescription / 中国实验方剂学杂志

Depression is a complex emotional and mental disorder. The traditional Chinese medicine （TCM） methods for treating depression mainly include soothing the liver and relieving depression. Our research team proposes that depression is caused by Yang Qi deficiency and obstructed Qi movement， which are closely related to neurological and psychological changes induced by early traumatic experiences. Therefore， we suggest that the treatment should focus on warming Yang， replenishing Qi， and promoting Qi movement and have formulated Wenyang Jieyu prescription based on Erxiantang for warming yang and Xiaoyaosan for relieving depression. The experiment with the mouse model of early trauma induced by maternal separation showed that Wenyang Jieyu prescription significantly improved the mouse activity and environmental exploration， reduced the immobility time in forced swimming and tail suspension tests， alleviated the behaviors such as aversion to darkness and fear of open space， enhanced social interaction and social cognitive abilities， altered decision-making biases， reduced depression-like behaviors， and improved the decision-making patterns. Additionally， the prescription lowered the serum level of cortisol， inhibited the cortisol surge in the dexamethasone/corticotropin-releasing hormone （Dex/CRH） test， up-regulated the expression of mineralocorticoid receptor （MR） and 11β-hydroxysteroid dehydrogenase 2 （11β-HSD2） in the hippocampus， down-regulated the expression of glucocorticoid receptor （GR） and corticotropin-releasing hormone receptor 1 （CRHR1）， inhibited the methylation of GR exon 1 and the expression of DNA methyltransferase 1 （DNMT1）， and restored the negative feedback of the hypothalamic-pituitary-adrenal （HPA） axis. Furthermore， Wenyang Jieyu prescription up-regulated the protein level of brain-derived neurotrophic factor （BDNF）， elevated the levels of postsynaptic density protein 95 （PSD95） and synaptophysin （Syn）， decreased the cell apoptosis index and B-cell lymphoma （Bcl-2）-associated X （Bax）/Bcl-2 ratio， suppressed the expression of Caspase-3， and enhanced the neuroplasticity and anti-apoptotic capacity in the hippocampus. Considering the research results， related articles， and clinical experience， we conclude that depression should be treated with liver-soothing and depression-relieving herbs， which can be supplemented with spleen-invigorating and Qi-regulating herbs to alleviate depressive symptoms. The Yang-warming and kidney-tonifying herbs can be used to eliminate the root cause and prevent relapse. Additionally， the wind-dispersing herbs can be supplemented to regulate the Qi movement throughout the body， thereby enhancing the efficacy of depression-relieving treatment.

In vitro study on cyclic fatigue resistance of three types of nickel titanium files in preparation for bending root canals / 口腔疾病防治

Objective@#The purpose of this study was to investigate the differences in the anti cyclic fatigue performance of Woride KS (WKS), Proteper Gold (PTG), and Hyflex CM (HCM) nickel titanium instruments with different tip diameters in curved root canal models, and to provide reference for the targeted selection of suitable nickel titanium instruments in clinical preparation of curved root canals.

Isolation of bone marrow mesenchymal stem cells in transgenic pigs and co-culture with porcine islets / 器官移植

Objective To investigate the isolation and culture of porcine bone marrow mesenchymal stem cell (BMSC) with α-1, 3-galactosyltransferase (GGTA1) gene knockout (GTKO), GTKO/ human CD46 (hCD46) insertion and cytidine monopho-N-acetylneuraminic acid hydroxylase (CMAH)/GGTA1 gene knockout (Neu5GC/Gal), and the protective effect of co-culture with porcine islets on islet cells. Methods Bone marrow was extracted from different transgenic pigs modified with GTKO, GTKO/hCD46 and Neu5GC/Gal. Porcine BMSC were isolated by the whole bone marrow adherent method and then cultured. The morphology of BMSC was observed and the surface markers of BMSC were identified by flow cytometry. Meantime, the multi-directional differentiation induced by BMSC was observed, and the labeling and tracing of BMSC were realized by green fluorescent protein (GFP) transfection. The porcine BMSC transfected with GFP were co-cultured with porcine islet cells. Morphological changes of porcine islet cells were observed, and compared with those in the porcine islet cell alone culture group. Results BMSC derived from pigs were spindle-shaped in vitro, expressing biomarkers of CD29, CD44, CD73, CD90, CD105 and CD166 rather than CD34 and CD45. These cells were able to differentiate into adipocytes, osteoblasts and chondrocytes. Porcine BMSC with GFP transfection could be labeled and traced, which could be stably expressed in the daughter cells after cell division. Porcine BMSC exerted certain protective effect on islet cells. Conclusions GFP-labeled porcine BMSC modified with GTKO, GTKO/hCD46 and Neu5GC/Gal are successfully established, which exert certain protective effect upon islet cells.

COMPARISON OF COMPLICATIONS OF CIRCUMCISION BY 'PLASTIBELL DEVICE TECHNIQUE' IN MALE NEONATES AND INFANTS

To determine the effectiveness of the circumcision by Plastibell technique comparing the complications among neonate and infant age groups.

Psychological repercussions on children and adolescents after paternal estrangement due to conjugal violence: maternal narratives / Repercusiones psicológicas en niños y adolescentes tras la separación paterna por violencia conyugal: narrativas maternas / Repercussões psicológicas em crianças e adolescentes após afastamento paterno por violência conjugal: narrativas maternas

ABSTRACT Objective: to unveil the psychological repercussions perceived by mothers on children and adolescents after paternal estrangement due to conjugal violence. Method: this is a descriptive-exploratory study with a qualitative approach developed with mothers in legal proceedings for conjugal violence at the 2nd Domestic and Family Violence Court of Salvador, Bahia, Brazil. Data collection took place between September and November 2021 through interviews carried out using a virtual meeting application, guided by a semi-structured form. Interviews were recorded with authorization, and later converted to a written version with the support of Microsoft Word. Data were organized through thematic content analysis proposed by Bardin. Results: this research was carried out with eight women/mothers aged 29 to 39 years, mostly self-declared black, evangelical, single and with complete high school. At the time of the interview, women had been separated from six months to a year and a half; lived with the father of children and children aged 7 to 15; and most of them had a single child, whose age ranged between 5 and 15 years. As results of the interviews, Emotional, Behavioral and Psychological categories emerged. Conclusion: the study reveals that, after paternal estrangement resulting from protective measures for mothers with a history of conjugal violence, children and adolescents experience emotional, behavioral and psychological repercussions. The study can contribute to strengthening the psychological care of children/adolescents who have experienced violence, providing professionals with support to outline preventive strategies.

RESUMEN Objetivo: revelar las repercusiones psicológicas percibidas por las madres en niños y adolescentes luego del alejamiento paterno por violencia conyugal. Método: estudio descriptivo-exploratorio con enfoque cualitativo desarrollado con madres en procesos judiciales por violencia conyugal en el 2º Juzgado de Violencia Doméstica y Familiar de Salvador, Bahía, Brasil. La recolección de datos se realizó entre septiembre y noviembre de 2021 a través de entrevistas realizadas mediante una aplicación de reuniones virtuales, guiadas por un formulario semiestructurado. Las entrevistas fueron grabadas, previa autorización, y posteriormente convertidas a versión escrita con soporte de Microsoft Word. Los datos fueron organizados a través del análisis de contenido temático, propuesto por Bardin. Resultados: esta investigación se realizó con ocho mujeres/madres de 29 a 39 años, en su mayoría autodeclaradas negras, evangélicas, solteras y con educación secundaria completa. En el momento de la entrevista, las mujeres llevaban separadas entre seis meses y un año y medio, y vivían con el padre de los niños y adolescentes de edades comprendidas entre 7 y 15 años y, la mayoría de ellos, tenían un solo hijo, cuya edad oscilaba entre 5 y 15 años. Como resultados de las entrevistas surgieron las categorías Emocional, Comportamental y Psíquica. Conclusión: el estudio revela que, después del alejamiento paterno resultante de medidas de protección a madres con antecedentes de violencia conyugal, niños y adolescentes experimentan repercusiones emocionales, conductuales y psicológicas. El estudio puede contribuir a fortalecer la atención psicológica de niños/adolescentes que han vivido violencia, brindando apoyo a los profesionales para trazar estrategias preventivas.

RESUMO Objetivo: Desvelar as repercussões psicológicas percebidas por mães em crianças e adolescentes após o afastamento paterno por violência conjugal. Método: Estudo de caráter descritivo-exploratório e abordagem qualitativa desenvolvido com as genitoras em processo judicial por violência conjugal junto à 2ª Vara de Violência Doméstica e Familiar de Salvador, Bahia, Brasil. A coleta de dados ocorreu entre setembro e novembro de 2021 através de entrevista realizada por aplicativo de reunião virtual, sendo guiada por formulário semiestruturado. As entrevistas foram gravadas, mediante autorização e, posteriormente, convertidas para a versão escrita com apoio do Microsoft Word. Os dados foram organizados por meio da análise de conteúdo temático, proposto por Bardin. Resultados: Esta pesquisa foi realizada com oito mulheres/mães na faixa etária de 29 a 39 anos majoritariamente autodeclaradas negras, evangélicas, solteiras e com ensino médio completo. No momento da entrevista, as mulheres tinham de seis meses a um ano e meio de separadas, tendo convivido com o pai das crianças e adolescentes de 7 a 15 anos e, na sua maioria, tinha um único filho, cuja idade variava entre 5 e 15 anos. Como resultados das entrevistas emergiram três categorias: Emocionais, Comportamentais e Psíquicas. Conclusão: O estudo revela que, após o afastamento paterno decorrente de medida protetiva às mães com história de violência conjugal, crianças e adolescentes apresentam repercussões de ordem emocional, comportamental e psíquica. O estudo pode contribuir no fortalecimento do cuidado psicológico de crianças/adolescentes que experienciaram a violência, munindo profissionais de subsídios para traçar estratégias preventivas.

Phase separation in cGAS-STING signaling / 医学前沿

Biomolecular condensates formed by phase separation are widespread and play critical roles in many physiological and pathological processes. cGAS-STING signaling functions to detect aberrant DNA signals to initiate anti-infection defense and antitumor immunity. At the same time, cGAS-STING signaling must be carefully regulated to maintain immune homeostasis. Interestingly, exciting recent studies have reported that biomolecular phase separation exists and plays important roles in different steps of cGAS-STING signaling, including cGAS condensates, STING condensates, and IRF3 condensates. In addition, several intracellular and extracellular factors have been proposed to modulate the condensates in cGAS-STING signaling. These studies reveal novel activation and regulation mechanisms of cGAS-STING signaling and provide new opportunities for drug discovery. Here, we summarize recent advances in the phase separation of cGAS-STING signaling and the development of potential drugs targeting these innate immune condensates.

CRISPR-assisted transcription activation by phase-separation proteins

The clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9 system has been widely used for genome engineering and transcriptional regulation in many different organisms. Current CRISPR-activation (CRISPRa) platforms often require multiple components because of inefficient transcriptional activation. Here, we fused different phase-separation proteins to dCas9-VPR (dCas9-VP64-P65-RTA) and observed robust increases in transcriptional activation efficiency. Notably, human NUP98 (nucleoporin 98) and FUS (fused in sarcoma) IDR domains were best at enhancing dCas9-VPR activity, with dCas9-VPR-FUS IDR (VPRF) outperforming the other CRISPRa systems tested in this study in both activation efficiency and system simplicity. dCas9-VPRF overcomes the target strand bias and widens gRNA designing windows without affecting the off-target effect of dCas9-VPR. These findings demonstrate the feasibility of using phase-separation proteins to assist in the regulation of gene expression and support the broad appeal of the dCas9-VPRF system in basic and clinical applications.

Application of cocrystal separation technology in the separation and purification of genistein-puerarin-daidzein ternary system / 药学学报

Cocrystal separation technology is a technology that utilizes coformers to selectively form cocrystals with target compounds and separate them from mixed systems. Our study used puerarin (PUE), daidzein (DDZ), and genistein (GEN) as model drugs, which have similar structures and are the main isoflavones in Pueraria lobata root. The separation and purification processes in the modern traditional Chinese medicine (TCM) of these three components use conventional column chromatography, recrystallization, and other technologies, which have the issues of lengthy separation cycles, high solvent consumption, and inefficient preparation. Different with existing separation technology, our team used the early-found cocrystal separation method to design a step-by-step extraction and separation experiment of GEN-PUE-DDZ ternary mixture. Caffeine and L-proline were added to the mixed system in turn, GEN-caffeine cocrystal and PUE-proline cocrystal were prepared by suspension method. The cocrystals precipitated out of the solution. The purities of the GEN-caffeine cocrystal and the PUE-proline cocrystal could achieve 93% (the purity of GEN) and 99% (the purity of PUE). Besides, the purity of DDZ could also be increased by 6.76 times. This study proposed a simple operating, low cost and wide application range separation method different from the traditional separation method and realized the separation of structurally similar chemical components in TCM, laying a foundation for the application of cocrystal technology in the separation and refining of TCM.

Efficacy of modified prostate tip separation technique combined with laparoscopic radical prostatectomy based on propensity score matching / 现代泌尿外科杂志

【Objective】 To explore the efficacy of modified prostate tip separation technique combined with laparoscopic radical prostatectomy based on propensity score matching (PSM) in the treatment of prostate cancer. 【Methods】 A total of 74 prostate cancer patients treated during Jan.2019 and Dec.2022 with modified prostate tip separation technique combined with laparoscopic radical prostatectomy were included in the combined group, and another 63 prostate cancer patients treated during the same period with laparoscopic radical prostatectomy were selected as the control group. Altogether 58 pairs of patients were matched with PSM. The perioperative indicators, incidence of complications, urinary control function and sexual function before and one month after surgery between the two groups after matching were compared. 【Results】 There were no statistically significant differences in general data between the two groups (P>0.05). One month after operation, the scores of the International Urinary Incontinence Questionnaire (ICIQ-SF) and International Erectile Function Questionnaire (IIEF-5) in both groups decreased, while the Expanded Prostate Cancer Index Composite (EPIC-UIN) and International Prostate Symptom Score (IPSS) in both groups increased (P<0.05). The scores of ICIQ-SF [(9.02±1.98) vs. (11.38±2.04)] and IPSS [(19.67±4.19) vs. (21.68±4.23)] were lower in the combined group than in the control group (P<0.05), while the scores of EPIC-UIN [(70.49±6.82) vs. (63.34±6.48)] and IIEF-5 [(18.17±1.73) vs. (16.72±1.58)] were higher in the combined group than in the control group (P<0.05). Compared with the control group, the combined group had shorter catheter retention time [(7.38±1.97) d vs. (5.11±1.82) d] and hospital stay [(13.18±2.23) d vs. (11.74±2.09) d], lower incidence of complications (22.41% vs. 6.90%), and higher positive rate of incision margin (8.62% vs. 20.69%) (P<0.05). 【Conclusion】 PSM can balance the differences between groups. The modified prostate tip separation technique combined with laparoscopic radical prostatectomy can improve the urinary control function, have little impact on sexual function, and cause fewer postoperative complications. However, the risk of positive incision margin is high, and further modification is needed to achieve the best therapeutic effects.

Memoirs of yesterday: The lived experience of individuals with separated parents

@#Separation issues have been rampant, and a significant rise in union dissolution cases in the Philippines has been observed. This certain occurrence should be given particular attention because it may alter the individual's way of living, particularly in perceiving and dealing with relationships. This study explores the lived experience of individuals who have undergone parental separation. The study utilized a Hermeneutic Phenomenological Design, which involved ten (10) respondents using a semi-structured key informant interview guide. The respondents were selected based on criteria as follows: (1) Have parents who have decided on the dissolution of marriage (annulled or informal) living separately; (2) 18 years of age and above; (3) Residents of Central Visayas; permanent or transient in Cebu City and; (4) Able to understand and express ideas in Cebuano dialect or English language. An Interpretative Phenomenological Analysis anchored on van Manen's six-step interpretive phenomenological approach with management and analysis done manually created a poem titled “Memoirs of Yesterday,” which incorporates three (3) major themes: (1) Into the Tunnel: Etiology of Separation, (2) The Darkness in the Tunnel: effects of the dissolution of marriage to children- emotional, psychological and academic status and (3) The Light After the Tunnel: attitude of the child and parent towards relationships and separation. The study implies that nurses should recognize the importance of assessing family concerns in rendering holistic and individualized client care. Thus, nurses should use assessed needs in advocating for the creation of more programs on awareness and counseling to families and, most especially, children.

Commentary on relevant issues in surgical treatment of spinal metastatic tumors / 中国骨伤

The multidisciplinary treatment model led by surgery has become a comprehensive strategy and overall concept for the treatment of spinal metastatic tumors. But the surgical treatment of spinal metastatic tumors is different from primary malignant tumors of the spine. Surgery is only a part of the multidisciplinary comprehensive treatment. Therefore, the following aspects need to be evaluated comprehensively based on the survival assessment, evaluation of spinal stability damage, nerve dysfunction, and oncological characteristics of the metastatic tumors with a reasonable surgical intervention. The attention should be paid to the minimally invasive treatment of spinal metastases, progress of new radiotherapy technology, neoadjuvant chemotherapy, targeted drug therapy and other medical treatment to make a comprehensive and individualization decision which is benefit to relieve patients ' pain, reconstruct spinal stability and avoid paralysis. While improving patient survival, increasing local tumor control rate and possibly prolonging survival time, avoiding excessive surgery as much as possible.

Research progress in separation surgery combined with stereotactic radiotherapy of spinal metastases / 中国骨伤

With the continuous improvement of cancer treatment, the survival of patients with spinal metastases has been significantly prolonged. Currently, the treatment of spinal metastases presents a trend of multi-mode. Clinical surgical methods include vertebral tumor resecting spinal canal decompression and internal fixation surgery, separation surgery, minimally invasive surgery and percutaneous ablation technology, etc. Radiotherapy techniques include traditional external radiation therapy, stereotactic radiotherapy and brachytherapy, etc. The risk of vertebral tumor resecting spinal canal decompression and internal fixation surgery, and the incidence of intraoperative and postoperative complications is high. The extension of postoperative recovery period may lead to delay of follow-up radiotherapy and other medical treatment, which has a serious impact on patients' survival and treatment confidence. However, the precision of traditional external radiation therapy is not high, and the limitation of tolerance of spinal cord makes it difficult to achieve the goal of controlling insensitive tumor. With the development of radiotherapy and surgical technology, stereotactic radiotherapy with higher accuracy and separation surgery with smaller surgical strike have become the focus of many clinical experts at present. This article reviews the progress of Hybrid treatment of separation surgery combined with stereotactic radiotherapy.

Research progress on plant-derived exosome-like nanoparticles and their applications / 中国中药杂志

Plant-derived exosome-like nanoparticles(PELNs) are a class of membranous vesicles with diameters approximately ranging from 30 to 300 nm, isolated from plant tissues. They contain components such as proteins, lipids, and nucleic acids. PELNs play an important role in the metabolism of plant substances and immune defense, and can also cross-regulate the physiological activities of fungi and animal cells, showing significant potential applications. In recent years, research on PELNs has significantly increased, highlighting three main issues:(1) the mixed sources of plant materials for PELNs;(2) the lack of a unified system for isolating and characterizing PELNs;(3) the urgent need to elucidate the molecular mechanisms underlying the cross-regulation of biological functions by PELNs. This article focused on these concerns. It began by summarizing the biological origin and composition of PELNs, discussing the techniques for isolating and characterizing PELNs, and analyzing their biomedical applications and potential future research directions., aiming to promote the establishment of standardized research protocols for PELNs and provide theoretical references for in-depth exploration of the mechanisms underlying PELNs' cross-regulatory effects.

Identification of involatile chemical components from Moutai-flavored distiller’s grains / 中国药科大学学报

@#In order to study the involatile chemical components in Moutai-flavored distiller’s grains, the Moutai-flavored distiller’s grains were extracted with 75% ethanol, followed by extraction with petroleum ether, ethyl acetate, and n-butanol. Silica gel, ODS, sephadex LH-20, and preparative HPLC were used to separate and identify the petroleum ether and ethyl acetate layers.ESI-MS and NMR were used to identify the compounds, which were respectively identified as pentadecanoic acid (1), palmitic acid (2), trans-2-decenoic acid (3), n-nonyl octadecanoate (4), ethyl octadecanoate (5), ethyl linoleate (6), luric acid (7), 1, 3-dicaprylyl-2-linoleylglycerin (8), cyclic (phenylalanine-proline) (9), cyclo-(proline-leucine) (10), 3, 6-bis-(2-methylpropyl)-2,5-dione piperazine (11), 4-hydroxyphenethyl alcohol (12), 2,4-dihydroxybenzoic acid (13), stigmasterol (14), 2-furancarboxylic acid (15), valine (16), L-alanine acyl-L-proline (17), dihydroquercetin (18), 5, 7, 3'', 4''-tetrahydroxyflavonoids (19), quercetin (20), and naringenin (21). Compounds 1-21 were isolated from distiller’s grains for the first time.

Chiral separation methods and the applications in the study of chiral components of traditional Chinese medicines / 药学学报

Chirality is one of the fundamental properties of nature, and most of the important molecules in living organisms contain chiral structures. The efficacy and safety of drugs are often closely related to the chiral structure of compounds, however, there are relatively more studies on synthetic characterization, pharmacology, and toxicology of chiral small molecule chemical drugs, but relatively less studies on chiral compounds contained in natural drugs such as traditional Chinese medicines. Chiral separation, as the basis of chiral research, has a pivotal position in the study of chiral compounds. In this paper, we systematically describe the separation methods of chiral compounds from the classification of chiral splitting methods based on chromatographic and non-chromatographic methods, as well as chromatographic packing materials, chiral additives and chiral derivatization, and review the chiral compounds in natural drugs such as traditional Chinese medicines reported in the past ten years, in order to provide references for the splitting and evaluating the activity of chiral compounds, and the improvement of quality standards of traditional Chinese medicines.

Separation, characterization and anti-psoriasis effect of self-assembled nanoparticles from Shaoyao Gancao Decoction / 中国中药杂志

This study aims to separate and characterize self-assembled nanoparticles(SAN) from Shaoyao Gancao Decoction(SGD) and determine the content of active compounds. Further, we aimed to observe the therapeutic effect of SGD-SAN on imiquimod-induced psoriasis in mice. The separation of SGD was performed by dialysis, and the separation process was optimized by single factor experiment. The SGD-SAN isolated under the optimal process was characterized, and the content of gallic acid, albiflorin, paeoniflorin, liquiritin, isoliquiritin apioside, isoliquiritin, and glycyrrhizic acid in each part of SGD was determined by HPLC. In the animal experiment, mice were assigned into a normal group, a model group, a methotrexate group(0.001 g·kg~(-1)), and SGD, SGD sediment, SGD dialysate, and SGD-SAN groups of different doses(1, 2, and 4 g·kg~(-1)) respectively. The psoriasis grade of mice was evaluated based on the pathological changes of skin lesions, the content of inflammatory cytokines, organ index and other indicators. The results showed that SAN obtained by centrifugation at 13 000 r·min~(-1) for 30 min was stable after dialysis for 4 times, which were uniform spherical nanoparticles with the particle size of(164.43±1.34) nm, the polydispersity index of(0.28±0.05), and the Zeta potential of(-12.35±0.80) mV. The active compound content accounted for more than 70% of SGD. Compared with the model group, SAN and SGD decreased the skin lesion score, spleen index, and inflammatory cytokine levels(P<0.05 or P<0.01) and alleviated the skin thickening and infiltration of inflammatory cells. However, the sediment group and the dialysate group had no obvious effect. SGD showed a good therapeutic effect on imiquimod-induced psoriasis in mice, and SAN demonstrated the effect equivalent to SGD in a dose-dependent manner. Therefore, we conclude that the SAN formed during decocting is the main active form of SGD, which can lower the levels of inflammatory cytokines, promote the normal differentiation of keratinocytes, and reduce the infiltration of inflammatory cells in the treatment of psoriasis lesions in mice.

Application of high-speed counter current chromatography in extraction and separation of alkaloids in natural products / 中国中药杂志

Alkaloids, widespread in plants, have a series of pharmacological activities and have been widely used to treat various diseases. Because alkaloids are usually presented in multicomponent mixtures and are deeply low in content, they are very difficult to extract and separate by traditional methods. High-speed counter current chromatography(HSCCC) is a kind of liquid-liquid chromatography without solid support phase, which has the advantages of large injection volume, low cost, and no irreversible adsorption. Compared with the traditional methods of extraction and separation of alkaloids, HSCCC can ensure the separation of many different alkaloids at one time, with a high recovery and large amount. In this paper, the advantages and disadvantages of HSCCC compared with traditional separation methods were discussed and the solvent system and elution mode of HSCCC used to separate alkaloids in recent years were summarized by referring to the relevant literature to provide some references for the separation of alkaloids by HSCCC.

A new flavonoid glycoside from Epimedium sagittatum / 药学学报

Fourteen flavonoids were isolated and purified from Epimedium sagittatum by various chromatography techniques such as macroporous adsorbent resin, silica gel, ODS, Sephadex LH-20, HW-40C and semi-preparative HPLC. Their structures were identified by analysis of physicochemical properties and spectral data, and determined as 3′-hydroxy-baohuoside-Ⅱ (1), huazhongilexone-7-O-β-D-glucopyranoside (2), kaempferol-3-O-α-L-rhamnoside (3), baohuoside-Ⅱ (4), icariside-Ⅱ (5), kaempferol 3,7-di-O-α-L-rhamnopyranoside (6), (+)-aromadendrin (7), kaempferol 3-O-(2-O-β-D-apiofuranosyl)-α-L-rhamnopyranoside (8), sagittatoside A (9), 2″-O-rhamnosyl icariside-II (10), apigenin-7-O-β-D-glucoside (11), quercetin 3-O-β-D-apiofuranoyl-(1→2)-α-L-rhamnopyranoside (12), kaempferol (13), icariin (14). Among them, compound 1 is a new compound, while compounds 2, 6-8, 11, and 12 were isolated from E.sagittatum for the first time.