Electrophysiological Mechanisms of Sleep Homeostasis / 生物化学与生物物理进展

The brain’s neural circuits consist of a large number of highly unstable networks. Despite the existence of many internal and external factors that continuously disturb the balance, our brains employ an array of homeostatic mechanisms that allow neurons or neural circuits to sense how active they are, and when they deviate from a target value, whereby a force must be generated to move neuronal activity back toward this target. Sleep is one of the well-known physiological states in the regulation of homeostasis. Sleep pressure increases during wakefulness and decreases during sleep. When sleep is lost (e.g., sleep deprivation), this loss is compensated by extending or strengthening subsequent sleep. These phenomena are known as sleep homeostasis. The dysregulation of sleep homeostasis accompanies brain-related diseases such as schizophrenia, bipolar disorder, major depressive disorder, and autism spectrum disorder. More importantly, it can significantly undermine the basis of traditional sleep hygiene practices for these diseases. Therefore, clarifying the mechanisms of sleep homeostasis is important for therapy, but it remains an unsolved mystery. In addition to pharmacological treatment, non-invasive brain stimulation has become one of the most promising tools for clinical treatment in recent years due to its low cost, portability and low incidence of side effects. In order to promote relevant technologies, this review will focus on the electrophysiological mechanisms of sleep homeostasis. We first discuss the electrophysiological marker of sleep homeostasis, slow-wave activity, then move to the neuronal firing rates, finally discuss more aspects of sleep homeostasis, including differences in brain area, sleep stages, learning and individual differences.

Application of p16INK4a combined with human papillomavirus and liquid-based cytology in clinical diagnosis of cervical intraepithelial neoplasia / 现代医院

Objective To analyze the detection efficiency of p16INK4a protein combined with human papillomavirus and liquid-based cytology(LCT)in the screening of cervical precancerous lesions,and to provide a basis for cervical cancer preven-tion and treatment.Methods The results of p16INK4a staining of cervical epithelial cells,human papillomavirus testing and cer-vical cytology were analyzed in 139 inpatients at Guangzhou Women's and Children's Medical Center between January 2019 and December 2020.Of them,there were 111 patients with cervical intraepithelial neoplasia(CIN)and 28 cases of cervical inflam-matory disease.The efficacy of the three methods alone and in combination to screen for CIN lesions was compared.Results In the detection of CIN patients,the sensitivity of p16INK4a,microfluidic microarray and cervical cytology for detecting CIN and a-bove lesions was 91.89% ,94.59% and82.88% ,with specificity of 57.14% ,17.86% and46.43% ,and AUC of 0.75,0.56 and 0.65,respectively;while the sensitivity of"p16INK4a+LCT","p16INK4a+hrHPV","LCT+hrHPV"and their sen-sitivity were 96.40% ,97.30% ,94.59% and 99.10% ,their specificity was 85.71% ,92.86% ,89.29% and 92.86% ,and the AUC was 0.91,0.95,0.92 and 0.96,respectively.Conclusion The combined p16INK4a and hrHPV test helps to improve diagnostic accuracy and early detection,thus allowing for earlier intervention or treatment.This combined application allows for more accurate identification of low-grade and high-grade cervical intraepithelial neoplasia,providing more information for indi-vidualized patient management.

Two new phenolic amides from Allium chinense / 中草药·英文版

OBJECTIVE@#To isolate the phenolic amides from the dried bulbs of Allium chinense and investigate their myocardium protective activities.@*METHODS@#The chemical constituents were isolated and purified by combining with silica gel column, Sephadex LH-20 column, HPLC and other chromatography techniques. Their structures were elucidated by NMR techniques and mass spectrometry. The isolated compounds were evaluated to determine their protective effect for myocardium cells in vitro.@*RESULTS@#Two new phenolic amides, namely, alichinemide I ( 1) and alichinemide II ( 2), and six konwn amides were isolated from the dried bulbs of A. chinense. The structures of compounds 3- 8 were identified as 3-indolcarbaldehyde ( 3), 1-(2-aminophenyl)urea ( 4), 2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic acid ( 5), N-trans-feruloyltyramine ( 6), N-trans-p-coumaroyltyramine ( 7), and N-(3,4-dimethoxyphenethyl) acetamide ( 8). Compound 3 (50 μmol/L) showed significant inhibitory effect on the damage of H9c2 myocardial cells induced by H2O2in vitro.@*CONCLUSION@#Compounds 1 and 2 were new phenolic amides. Compound 3 could be one of the potential myocardium protective constituents of A. chinense.

Effect of transcutaneous auricular vagus nerve stimulation on functional connectivity in the related brain regions of patients with depression based on the resting-state fMRI / 中国针灸

OBJECTIVE@#To explore the brain effect mechanism and the correlation between brain functional imaging and cognitive function in treatment of depressive disorder (DD) with transcutaneous auricular vagus nerve stimulation (taVNS) based on the resting-state functional magenetic reasonance imaging (rs-fMRI).@*METHODS@#Thirty-two DD patients were included in a depression group and 32 subjects of healthy condition were enrolled in a normal group. In the depression group, the taVNS was applied to bilateral Xin (CO15) and Shen (CO10), at disperse-dense wave, 4 Hz/20 Hz in frequency and current intensity ≤20 mA depending on patient's tolerance, 30 min each time, twice daily. The duration of treatment consisted of 8 weeks. The patients of two groups were undertaken rs-fMRI scanning. The scores of Hamilton depression scale (HAMD), Hamilton anxiety scale (HAMA) and Wisconsin card sorting test (WCST) were observed in the normal group at baseline and the depression group before and after treatment separately. The differential brain regions were observed before and after treatment in the two groups and the value of degree centrality (DC) of fMRI was obtained. Their correlation was analyzed in terms of HAMD, HAMA and WCST scores.@*RESULTS@#The scores of HAMD and HAMA in the depression group were all higher than those in the normal group (P<0.05). After treatment, the scores of HAMD and HAMA were lower than those before treatment in the depression group; the scores of total responses, response errors and perseverative errors of WCST were all lower than those before treatment (P<0.05). The brain regions with significant differences included the left inferior temporal gyrus, the left cerebellar peduncles region 1, the left insula, the right putamen, the bilateral supplementary motor area and the right middle frontal gyrus. After treatment, the value of DC in left supplementary motor area was negatively correlated to HAMD and HAMA scores respectively (r=-0.324, P=0.012; r=-0.310, P=0.015); the value of DC in left cerebellar peduncles region 1 was negatively correlated to the total responses of WCST (r=-0.322, P=0.013), and the left insula was positively correlated to the total responses of WCST (r=0.271, P=0.036).@*CONCLUSION@#The taVNS can modulate the intensity of the functional activities of some brain regions so as to relieve depressive symptoms and improve cognitive function.

Identification of Chemical Components and Blood Components of Tianmaxingnao capsules Based on UPLC-Q/TOF-MS / 世界科学技术-中医药现代化

Objective The chemical composition and blood components of Tianmaxingnao capsules were discovered and examined using UPLC-Q/TOF-MS,and the possible pharmacological substance basis was preliminarily elucidated.Methods An UPLC-Q/TOF-MS method was developed in this study to determine the chemical composition of Tianma Xingnao capsules.After administration of Tianmaxingnao capsules,gather and examine rat plasma samples to investigate the exposed components of Tianmaxingnao capsules in rats.Results A total of 195 chemical components were identified in Tianmaxingnao capsules,including phenols,triterpenoid saponins,phenylethanol glycosides,cyclic ether terpenes,lipids,and phenylpropanoids.These components include those that are typical of Gastrodia elata Bl,Pheretima,Cistanche deserticola Ma,Rehmannia glutinosa,Polygala hybrida DC,and Acorus tatarinowii.Rat plasma samples were used to identify 37 prototype components and 3 metabolites of Tianmaxingnao capsules after they were administered.Conclusion This approach is easy to use,effective,sensitive,and precise.It may be used to investigate Tianmaxingnao capsules and the components that reach the bloodstream in detail,as well as to provide a first understanding of the pharmacological basis of the capsules.This study serves as a foundation for clarifying the pharmacological basis of Tianmaxingnao capsules and holds some reference value in exposing the pharmacological mechanism of the product.

Chemical Constituents of Ethyl Acetate Extracts from Stirps of Semiliquidambar cathayensis / 世界科学技术-中医药现代化

Objective To study the chemical constituents from ethyl acetate extracts of the strips of Semiliquidambar cathayensis.Methods The strips of S.cathayensis were extracted by 80%ethanol and the extracts were evaporated.Fourteen compounds in ethyl acetate extracts were isolated and purified by various chromatographic techniques,such as silica gel,Sephadex LH-20 column and pre-HPLC,etc.Their structures were identified on the basis of physicochemical properties and spectroscopic analysis.Antioxidant activity test was used to evaluate total extraction,each extraction part and the isolates.Results Fourteen compounds were isolated from the strips of S.cathayensis and identified by NMR as tetradecanoic acid(1),stearic acid(2),sesamin(3),9-octadecenoic acid(4),linoleic acid(5),dibutylphthalate(6),stigmasterol(7),β-sitosterol(8),lupeol(9),oleanolic acid(10),lup-20(29)-ene-3-[3-keto-hexadecanoate](11),peujaponisin(12),C-veratroylglycol(13),and 2,3-dihydroxy-1-(4-hydroxy-3,5-dimethoxyphenyl)-1-propanone(14).Conclusion Compounds 1,3,4,5,6,7,9,11,12,13 and 14 were isolated from this plant for the first time.The EA part,compounds 13(C-veratroylglycol)and 14(2,3-dihydroxy-1-(4-hydroxy-3,5-dimethoxyphenyl)-1-propanone)showed significant antioxidative effects.

The effect of swallowing intervention on improving the esophageal examination by magnetically controlled capsule endoscopy: a cohort study / 中华消化杂志

Objective:To investigate the effect and feasibility of swallowing intervention on esophageal examination by magnetically controlled gastric capsule endoscope (MCE), and to provide theoretical evidence for clinical application.Methods:From January 2021 to May 2022, 196 subjects who underwent MCE examination at West China Hospital, Sichuan University were prospectively enrolled. According to the swallowing action during MCE procedure, the subjects were divided into routine examination control group and swallowing-controlled intervention group with 98 cases in each group. The data of gender, age, history of smoking and drinking, body mass index, clinical symptoms (abdominal pain or abdominal distension, hematochezia, melena or positive fecal occult-bloodtest), esophageal transit time of MCE and detection rate of esophageal lesions were compared between the 2 groups. Wilcoxon rank sum test and chi-square test were used for statistical analysis.Results:There were no significant differences in age, gender, smoking history, drinking history, body mass index, history of diabetes, history of hypertension, and indication of MCE examination between the routine examination control group and swallowing-controlled intervention group (all P>0.05). All the subjects successfully completed the examination, and the capsules were excreted from the body. The median esophageal transit time of swallowing-controlled intervention group was longer than that of the routine examination control group (44.50 s (26.75 s, 101.25 s) vs. 11.00 s (5.00 s, 29.00 s)), and the difference was statistically significant ( Z=-8.13, P<0.001). The esophageal transit time of the patients aged 40 to 59 years old was longer than that of the patients aged <40 years old, but shorter than that of the patients aged ≥60 years old (54.00 s (36.25 s, 64.75 s) vs. 28.00 s (23.00 s, 35.00 s) and 69.50 s (64.75 s, 73.00 s)), and the differences were statistically significant ( Z=-6.72 and -6.91, both P<0.001). The detection rate of esophageal lesions of swallowing-controlled intervention group was higher than that of routine examination control group (22.4%, 22/98 vs. 11.2%, 11/98), and the difference was statistically significant ( χ2=4.41, P=0.036). Conclusion:Command-controlled swallowing can effectively prolong the time of esophagus examination by MCE, and improve the detection rate of esophageal lesions by MCE.

Rapid and sensitive analysis of trace β-blockers by magnetic solid-phase extraction coupled with Fourier transform ion cyclotron resonance mass spectrometry / 药物分析学报

A rapid and sensitive method for analyzing trace β-blockers in complex biological samples,which involved magnetic solid-phase extraction(MSPE)coupled with Fourier transform ion cyclotron reso-nance mass spectrometry(FTICR-MS),was developed.Novel nanosilver-functionalized magnetic nano-particles with an interlayer of poly(3,4-dihydroxyphenylalanine)(polyDOPA@Ag-MNPs)were synthesized and used as MSPE adsorbents to extract trace β-blockers from biological samples.After extraction,the analytes loaded on the polyDOPA@Ag-MNPs were desorbed using an organic solvent and analyzed by FTICR-MS.The method was rapid and sensitive,with a total detection procedure of less than 10 min as well as limits of detection and quantification in the ranges of 3.5-6.8 pg/mL and 11.7-22.8 pg/mL,respectively.The accuracy of the method was also desirable,with recoveries ranging from 80.9％to 91.0％following the detection of analytes in human blood samples.All the experimental results demonstrated that the developed MSPE-FTICR-MS method was suitable for the rapid and sensitive analysis of trace β-blockers in complex biological samples.

Application of artificial intelligence remote screening system for diabetic retinopathy in Yinchuan community of Ningxia / 国际眼科杂志(Guoji Yanke Zazhi)

AIM:To evaluate the application effect of artificial intelligence(AI)assisted diagnosis system in screening diabetic retinopathy(DR)in Yinchuan Community, Ningxia Hui Autonomous Region.METHODS:From July 2020 to July 2021, fundus photograph of 2 707 eyes from 1 358 diabetic patients with type 2 diabetes in two communities of Ningxia and Yinchuan were included in this study. The Eye Wisdom AI assisted screening and diagnosis system was used to analyze automatically and detect the characteristic changes of DR, such as hemorrhage, microaneurysms and retinal microvascular abnormalities. The results of fundus photograph were automatically graded according to the standard of DR international stage standard. The manual analysis group gave feedback after image interpretation, analyzed the sensitivity, specificity, misdiagnosis rate and missed diagnosis rate of the AI-assisted screening system for DR diagnosis, and compared the consistency between AI and manual analysis. Kappa consistency test was performed for the results of AI screening system and manual analysis.RESULTS:Compared with manual analysis, the sensitivity, specificity, missed diagnosis rate and misdiagnosis rate of AI were 91.84%, 99.06%, 8.16% and 0.94% respectively. The Kappa value of consistency analysis of the two diagnosis results was 0.817(P<0.001). Compared with manual analysis, the sensitivity and specificity of AI group to diagnose non-DR were 99.06% and 91.84% respectively. The sensitivity and specificity of mild NPDR were 85.36% and 98.52% respectively. The sensitivity and specificity of moderate NPDR were 81.53% and 98.55% respectively. The sensitivity and specificity of severe NPDR were 70% and 99.51% respectively. The sensitivity and specificity of PDR were 86.67% and 99.63% respectively. The Kappa value of the consistency analysis of DR staging diagnosis was 0.878(P<0.01).CONCLUSION: The AI remote screening system adopted in this study showed good consistency with the results of manual analysis, which can meet the needs of DR screening and provide a new effective prevention and treatment mode for DR patients in the community.

Wutou Chishizhi Wan Regulates Autophagy and PI3K/Akt/GSK-3β Signaling Pathway in Rats with Myocardial Ischemia-reperfusion Injury / 中国实验方剂学杂志

ObjectiveTo explore the mechanism of Wutou Chishizhi Wan in regulating autophagy and phosphatidylinositol 3-kinase （PI3K）/protein kinase B （Akt）/glycogen synthase kinase-3β （GSK-3β） signaling pathway in rats with myocardial ischemia-reperfusion injury （MIRI）. MethodSixty male SD rats were randomly assigned into the normal group （normal saline）， model group （normal saline）， positive control （trimetazidine， 5.4 mg·kg-1） group， and low-， medium-， and high-dose （1.63， 4.9， 14.7 g·kg-1， respectively） Wutou Chishizhi Wan groups， with 10 rats in each group. The rats in other groups except the normal group underwent left anterior descending coronary artery ligation for modeling. Electrocardiogram was employed to detect the ST-segment elevation to evaluate the modeling. Hematoxylin-eosin （HE） staining was performed to reveal the damage of myocardial tissue. The levels of aspartate aminotransferase （AST） and creatine kinase （CK） were determined by colorimetry， and those of cardiac troponin T （cTnT） and myoglobin （MYO） by enzyme-linked immunosorbent assay （ELISA）. Western blot was carried out to determine the protein levels of microtubule-associated proteins 1 light chain 3 （LC3）， autophagy-related gene Beclin-1， PI3K， Akt， GSK-3β， p-GSK-3β， and p-Akt. ResultCompared with the normal group， the modeling elevated the serum levels of AST， CK， cTnT， and MYO （P<0.01）， destroyed the arrangement of myocardial cells abd nucle， twisted and broken myocardial fibers， up-regulated the protein levels of LC3Ⅱ/Ⅰ and Beclin-1 （P<0.01）， and down-regulated the protein levels of PI3K， p-Akt， and p-GSK-3β （P<0.01）. Compared with the model group， trimetazidine and Wutou Chishizhi Wan （all the doses） lowered the levels of AST， CK， cTnT， and MYO in serum （P<0.01）， restored the arrangement of myocardial cells and muscle fibers， reduced necrosis， down-regulated the protein level of Beclin-1 （P<0.01）， and up-regulated the protein levels of PI3K， p-Akt， and p-GSK-3β （P<0.01）. Additionally， Wutou Chishizhi Wan （all the doses） down-regulated the protein level of LC3Ⅱ/Ⅰ （P<0.05， P<0.01）. Compared with those in the trimetazidine group， the serum AST level rose in the low-dose Wutou Chishizhi Wan group （P<0.05） and declined in the high-dose group （P<0.01）， and the protein level of Beclin-1 was down-regulated in the medium-dose group （P<0.01）. Additionally， the trimetazidine group had higher protein level of LC3Ⅱ/Ⅰ than medium- and high-dose Wutou Chishizhi Wan groups （P<0.05， P<0.01）， higher protein level of PI3K than low-， medium-， and high-dose groups （P<0.01）， lower protein level of p-Akt than low- and medium-dose groups （P<0.01）， and higher p-GSK-3β protein level than the medium-dose group （P<0.01）. ConclusionDifferent doses of Wutou Chishizhi Wan can ameliorate MIRI， and the high dose has the best effect. Wutou Chishizhi Wan can reduce the activity of myocardial injury markers AST， CK， cTnT， and MYO， and alleviate the pathological damage of myocardial tissue. It can down-regulate the protein levels of beclin-1， LC3Ⅱ/Ⅰ， and up-regulate those of PI3K， p-Akt， and p-GSK-3β. In summary， Wutou Chishizhi Wan may inhibit excessive autophagy and regulate the PI3K/Akt/GSK-3β signaling pathway to exert protective effect on MIRI rats.

Camganoids A and B, two new sesquiterpenes with different carbon skeletons isolated from fruits of Cinnamomum migao / 中草药·英文版

Objective: To isolate and identify the undescribed compounds from the fruits of Cinnamomum migao and evaluate its nitric oxide inhibition potential. Methods: The chromatographic techniques of silica gel, Sephadex, and HPLC were used for isolation and purification of the compounds, while HR-ESI-MS, 1D NMR, 2D NMR, ECD, and X-ray diffraction techniques were used to characterize and confirm the isolated compounds. Moreover, the anti-inflammatory activity of the isolated compounds was carried out to check inhibitory potential against the production of nitric oxide with RAW264.7 cells stimulated by LPS. Results: Camganoid A (1), a novel sesquiterpene possessing an unprecedented skeleton, and camganoid B (2), containing a unique eight-membered sesquiterpene moiety with a new carbon skeleton, were isolated and identified from the fruits of C. migao. The absolute configurations of 1 and 2 were confirmed by single crystal X-ray diffraction and electronic circular dichroism (ECD) calculations. Among these compounds, compound 1 exhibited potent inhibitory activity against the production of nitric oxide with IC

Application value of checklist-based transitional care on patients relatives relocation stress in patients undergoing cardiac surgery / 中国实用护理杂志

Objective:To explore the application value of checklist-based transitional care on patients relatives relocation stress in patients undergoing cardiac surgery.Methods:A total of 92 patients who undergoing cardiac surgery were assigned to experimental group ( n=46) and control group ( n=46). Patients in the control group received routine ICU transitional care, the experiment group carried out checklist-based ICU transitional care. The transfer time, time of early ambulation, length of hospitalization and incidence of postoperative complications were compared between two groups. Meanwhile, the relatives stress levels were assessed by family relocation stress scale. Results:The transfer time, time of early ambulation and post-intensive care syndrome rate were (11.80±3.58) min, (18.65±4.63) min and 4.35% (2/46) in the experimental group, significantly lower than those in the control group [(13.83±3.49)min, (21.37±4.97) min, 17.39% (8/46)], the difference was statistically significant ( t value was 2.739, 2.713, χ2 value was 3.866, P<0.05). After ICU transferring, the scores of preparation for relocation, family burden, satisfaction with the relocation process and total relocation stress were 21.11±2.57, 13.83±2.10, 7.57±1.11 and 7.57±1.11, significantly higher than in the control group (19.65±3.28, 19.65±3.28, 6.76±1.62, 46.43±4.11), the difference was statistically significant ( t value was 9.222-20.187, P<0.05). Conclusions:Checklist-based transitional care can reduce ICU transfer time, decrease postoperative pain and complications in patients undergoing cardiac surgery, which can also alleviate the levels of relatives relocation stress.

A systematic evaluation of biopharmaceutics classification system of main efficacy and toxic ingredients in Polygoni Multiflori Radix Praeparata / 中草药

Objective: Biopharmaceutics classification system (BCS) of five main pharmacological/toxic components (gallic acid, emodin, stilbene glycoside, physcion, and emodin-8-O-β-D-glucoside) of Polygoni Multiflori Radix Praeparata (PMRP) were carried out. Methods: The solubility and permeability of each representative component were studied by equilibrium solubility method and everted intestinal sac method, respectively. Using two softwares (Pipeline Pilot 7.5, ChemDraw 7.0) to predict the solubility and permeability parameters of each component. Classical BCS classification of measured and predicted values of representative components was conducted according to Food and Drug Administration (FDA) standards, and their correlation was evaluated. Results: The emodin, emodin-8-O-β-D-glucoside, and physcion in PMRP was preliminary determined as BCS IV drugs. THSG and gallic acid belong to BCS III drugs, and permeability was the main limiting factor in their absorption process. There was software which predicts false positives of anthraquinone in BCS classification studies. Conclusion: In this study, five main pharmacodynamic/toxic components of PMRP were classified by BCS method, which provided data support and technical reference for in vivo absorption prediction and in vitro safety evaluation of traditional Chinese medicine.

Exploration and practice of the closed-loop health management system of the West China Women and Children Alliance / 中华医院管理杂志

As one of the main forms of the medical alliance, the specialty alliance functions as a service carrier for hierarchical medical service and resources integration in the region. The authors introduced the exploration and practice of the West China Women′s and Children′s Alliance, the first pediatric specialty alliance in Sichuan, established by the West China Second Hospital of Sichuan University. Based on family doctor contracted services, the West China Women′s and Children′s Alliance took such measures as differentiated functional positioning, assessment of certified physicians, continuous online quality control, construction of referral platforms, and innovative payment mechanisms. Such efforts effectively integrated the three stages of pre-hospital " preventive care" , in-hospital " disease diagnosis and treatment" , and post-hospital " follow-up management" , exploring the homogenization of medical services within the alliance, and forming a pediatric closed-loop health management system, hence improving the primary medical services.

Study on Stability of Salvianolate Lyophilized Injection and Establishment of Stability-Indicating Analysis Method / 中国实验方剂学杂志

Objective::To study the degradation of salvianolate lyophilized injection (SLI) and establish a stability-indicating analysis method. Method::UPLC-Q-TOF-MS/MS was used to conduct a qualitative study on the main components of SLI, and a stability-indicating analysis method was established for simultaneous determination of the original components of SLI and its degradation products. The stability of SLI were systematically assessed under physicochemical conditions of high temperature, oxidation, metal ions. Result::Totally 13 main active ingredients in SLI were identified, and a semi-quantitative analysis was performed. Under the conditions of high temperature, oxidation, light, trivalent ion and divalent ion, 6, 4, 3, 4 and 1 new degradation products were added respectively. The established stability-indicating analysis method can simultaneously determine the degradation products of the main components and their active components in SLI, with a good separation effect. Conclusion::According to the degradation mechanism of the main ingredients in SLI, macromolecular polyphenol acid compounds are degraded into small molecular compounds, such as tanshinol and protocatechu aldehyde by a series of reactions, like benzofuran open-loop, hydrolysis of ester bond and removal of DSS. The stability-indicating analysis method can be used for the stability quality control of traditional Chinese medicine Salvianolate Lyophilized Injection (SLI).

Development of andrographolide colon-targeting release pellets based on quality by design (QbD) approach / 中草药

Objective: To optimize andrographolide pellet by using a quality by design (QbD) approach. Methods: Usingthe cumulative in vitro release as evaluation index, the single-factor investigation and hazard analysis were used to study the core and coating process of andrographolide colon-targeting pellets, and the central composite design-response surface method was used to optimize and predict the three key factors of plasticizer dosage, aging time, and coating weight gain. Results: The optimum coating process parameters were as following: plasticizer dosage of 3 g, coating weight gain of 20%, and aging time of 1 h. The process had been verified that the optimal formulation process had a cumulative in vitro release of 6.9% in the acid phase (0.1 mol/L HCl)-buffered salt phase (pH 6.0) and a cumulative in vitro release of more than 90% in the pH 7.2 buffered salt phase. Conclusion: It is feasible to apply the QbD concept optimization in the study of andrographolide colon-targeting pellets.

Anti-NMDA receptor encephalitis caused by ovarian teratoma / 中华内分泌外科杂志

Ovarian teratoma is agynecological disease,which has been found to be closely related to antiNMDA receptor encephalitis in recent years.Anti-NMDA receptor encephalitis is a kind of autoimmune encephalitis.Its etiology,pathogenesis,diagnosis and treatment are still not clear,and the disease has various clinical manifestations and special test methods,which are often ignored by clinicians.The prognosis is poor if the best treatment timing is missed,so early treatment is very important.At present,the main treatment methods include surgical treatment and immunotherapy.Most people can be cured,but the disease has a certain recurrence rate.The recurrence mechanism and treatment need further investigation.Reports on maternal anti-NMDAR encephalitis are rare,but we need to pay lots of attention to it as it is related to maternal and fetal outcomes.

Preferential adsorption of flavonoids and organic acids by amino-modified Fe3O4 nanoparticles (MNP-NH2) / 中草药

Objective To synthesize amino-modified Fe3O4 nanoparticles (MNP-NH2) and study the adsorption of flavonoids and organic acids by MNP-NH2. Methods MNP-NH2 were synthesized and characterized by transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, and vibrating sample magnetometer analysis; The adsorption rule of MNP-NH2 was discussed by studying the adsorption properties of 12 monomers. The adsorption properties of MNP-NH2 were assessed under conditions of different ultrasonic time, temperature, ionic strength, and pH. The final elution conditions were determined by L9(34) orthogonal test and the recycling performance was also considered. Results MNP-NH2 synthesized in this study have stable structure, uniform distribution, and good magnetic properties. Adsorption of 12 monomers by MNP-NH2 showed that the mechanism of adsorption was related to the number of ortho-phenolic hydroxyl groups. Ions concentration and temperature had little effect on adsorption for different compounds except pH. The optimized adsorption conditions were extraction for 40 min at 30 ℃ and the final elution conditions were determined to be 5 mL of 20% glacialacetic acid (methanol-water 60∶40) and ultrasonication for 40 min. Conclusion MNP-NH2 can be utilized to extract the effective components of Lonicerae Japonicae Flos and maintain a high adsorption rate of flavonoids. Moreover, MNP-NH2 had great recycling and reproducibility, providing new ideas for the utilization of extracting chemical compounds from complex traditional Chinese medicine and natural medicines.

Recent progress in advanced glycation end-products of gestational diabetes mellitus / 中华内分泌外科杂志

Advanced glycation end-products (AGEs) are stable and toxic by-products of non-enzymatic metabolic reaction of proteins,lipids and nucleotides.The elevated serum AGEs level in pregnant women is strongly associated with hyperglycemia,oxidative stress and insulin resistance and may be one of the cause for the onset and development of the gestational diabetes mellitus(GDM).This review mainly focuses on the pathogenesis of AGEs and GDM.

Research Trend Analysis of Salvia Miltiorrhiza Based on SIOP Database / 世界科学技术-中医药现代化

Salvia miltiorrhiza, as one of the top grade herbs in Sheng Nong.s herbal classic, occupies promoting blood circulation function. The pharmacological of Salvia miltiorrhiza is obvious and the relevant research are extensive.However, there is still potential space for development. In this paper, the patents about Salvia miltiorrhiza were analyzed.The patents were collected from Patent Search Service System of"State Intellectual Property Office of the People's Republic of China". A total of 29 468 patent documents related to Salvia miltiorrhiza were retrieved. The health products and agriculture of Salvia miltiorrhiza has been well developed in recent years. The technology life cycle results show that the research of Salvia miltiorrhiza is in the growth stage. The analyze result shows that the application number were increasing year by year, and the increasing was sharp. The average number of patent applications of the top 10 patent holders is about 100, and the research focus is different. The distribution of patent technology in Salvia miltiorrhiza appears to be diversified, mainly in the fields of medicine, agriculture, chemical engineering and engineering. The results of high-quality and effective patent technology distribution show that classic research fields of Salvia miltiorrhiza are A61 K35 and A61 K36. The research of Salvia miltiorrhiza is still in rapid development stage, and involves a wide range of areas to be further studied and developed.