Protective Effect of Liuwei Dihuangwan on Mitochondrial Damage in AD Model of Caenorhabditis Elegans / 中国实验方剂学杂志

ObjectiveTo investigate the protective effect of the extract of Liuwei Dihuangwan （LW） on mitochondrial damage in the Alzheimer's disease （AD） model of Caenorhabditis elegans （C. elegans）. MethodC. elegans transfected with human β-amyloid protein （Aβ） 1-42 gene was used as an AD model. The rats were divided into blank group， model group， metformin group （50 mmol·L-1）， and low， medium， and high dose （1.04， 2.08， 4.16 g·kg-1） LW groups. Behavioral methods were used to observe the sensitivity of 5-hydroxytryptamine （5-HT） in nematodes. Western blot was used to detect the expression of Aβ in nematodes. Total ATP content in nematodes was detected by the adenine nucleoside triphosphate （ATP） kit， and mitochondrial membrane potential was detected by the JC-1 method. In addition， the mRNA expression of Aβ expression gene （Amy-1）， superoxide dismutase-1 （SOD-1）， mitochondrial transcription factor A homologous gene-5 （HMG-5）， mitochondrial power-associated protein 1 （DRP1）， and mitochondrial mitoprotein 1 （FIS1） was detected by real-time fluorescence quantitative polymerase chain reaction （RT-PCR）. ResultThe extract of LW could reduce the hypersensitivity of the AD model of nematodes to exogenous 5-HT （P<0.05） and delay the AD-like pathological characteristics of hypersensitivity to exogenous 5-HT caused by toxicity from overexpression of Aβ in neurons of the AD model of nematodes. Compared with the blank group， in the model group， the mRNA expression of Aβ protein and Amy-1 increased （P<0.01）， and the mRNA expression of SOD-1 and HMG-5 decreased （P<0.01）. The mRNA expression of DRP1 and FIS1 increased （P<0.01）， and the level of mitochondrial membrane potential decreased （P<0.05）. The content of ATP decreased （P<0.01）. Compared with the model group， in the positive medicine group and medium and high dose LW groups， the mRNA expression of Aβ protein and Amy-1 decreased （P<0.05，P<0.01）， and the mRNA expression of SOD-1 and HMG-5 increased （P<0.01）. The mRNA expression of DRP1 decreased （P<0.05，P<0.01）， and that of FIS1 decreased （P<0.01）. The level of mitochondrial membrane potential increased （P<0.01）， and the content of ATP increased （P<0.05，P<0.01）. ConclusionThe extract of LW may enhance the antioxidant ability of mitochondria， protect mitochondrial DNA， reduce the fragmentation of mitochondrial division， repair the damaged mitochondria， adjust the mitochondrial membrane potential， restore the level of neuronal ATP， and reduce the neuronal damage caused by Aβ deposition.

Association of depressive symptoms, Internet addiction and insomnia among medical students in Anhui Province / 中国学校卫生

Objective@#To investigate the status of insomnia, Internet addiction, and depressive symptoms among medical students and to analyze the effect of Internet addiction on insomnia and the mediating role of depressive symptoms, in order to provide a basis for the development of targeted interventions and measurements for medical students.@*Methods@#A stratified whole group sampling method was used to select full-time college students from three medical universities in Anhui Province. The Chinese version of Insomnia Severity Index (ISI), Internet Addiction Test (IAT) scale and 9-item Patient Health Questionnaire (PHQ-9) were used to evaluate the symptoms of insomnia, Internet addiction and depressive in students. A multivariate Logistic regression analysis was used to explore the factors influencing insomnia among medical students and to analyze the relationship between insomnia with Internet addiction and depressive symptoms, respectively.@*Results@#The overall rate of Internet addiction was 49.5%, depressive symptoms was 39.5%, insomnia was 18.6%. High academic stress, and the presence of surrounding people diagnosed with COVID-19 were associated with a higher risk of insomnia ( P <0.05). The higher the level of Internet addiction (mild, OR =2.60; moderate/severe, OR =4.21) and depression. (mild, OR =6.35; moderate/severe, OR =19.32), the higher the risk of insomnia. Mediated effect analysis showed that Internet addiction had a direct predictive effect ( β =0.02, P <0.05) on insomnia and also indirectly affected insomnia through depression (indirect effect=0.07，95% CI =0.06-0.08).@*Conclusion@#The detected rates of insomnia, Internet addiction and depressive symptoms are high among medical students in Anhui Province, and Internet addiction and depressive symptoms are risk factors for insomnia, which should be given more attention and appropriate interventions when necessary to improve their physical and mental health.

Mechanism of albiflorin in improvement of Alzheimer's disease based on network pharmacology and in vitro experiments / 中国中药杂志

This study aimed to explore the mechanism of albiflorin in the treatment of Alzheimer's disease(AD) based on network pharmacology, molecular docking, and in vitro experiments. Network pharmacology was used to predict the potential targets and pathways of albiflorin against AD, and molecular docking technology was used to verify the binding affinity of albiflorin to key target proteins. Finally, the AD cell model was induced by Aβ_(25-35) in rat pheochromocytoma(PC12) cells and intervened by albiflorin to validate core targets and pathways. The results of network pharmacological analysis showed that albiflorin acted on key targets such as mitogen-activated protein kinase-1(MAPK1 or ERK2), albumin(ALB), epidermal growth factor receptor(EGFR), caspase-3(CASP3), and sodium-dependent serotonin transporter(SLC6A4), and signaling pathways such as MAPK, cAMP, and cGMP-PKG. The results of molecular docking showed that albiflorin had strong binding affinity to MAPK1(ERK2). In vitro experiments showed that compared with the blank group, the model group showed decreased cell viability, decreased expression level of B-cell lymphoma 2(Bcl-2), increased Bcl-2-associated X protein(Bax), and reduced phosphorylation level of extracellular signal-regulated kinase 1/2(ERK1/2) and the relative expression ratio of p-ERK1/2 to ERK1/2. Compared with the model group, the albiflorin group showed potentiated cell viability, up-regulated expression of Bcl-2, down-regulated Bax, and increased phosphorylation level of ERK1/2 and the relative expression ratio of p-ERK1/2 to ERK1/2. These results suggest that the mechanism of albiflorin against AD may be related to its activation of the MAPK/ERK signaling pathway and its inhibition of neuronal apoptosis.

Strategies for improving the scientific research ability of trainees in standardized residency training of dermatology / 中华医学教育探索杂志

In this paper, combined with the characteristics of rotational learning of dermatologists, we have taken various measures such as improving the scientific research training system, strengthening the awareness of scientific research, optimizing the teaching mode, adding new assessment mechanism, hand-in-hand teaching and other measures to realize the close combination of clinical and scientific research, and lay a solid foundation for the cultivation of high-quality innovative talents in dermatology.

lncRNA SNHG14 regulates the malignant biological behaviors of thyroid cancer SW579 cells by targeting miR-433-3p / 中国肿瘤生物治疗杂志

@#[摘 要] 目的：探讨lncRNA SNHG14对甲状腺癌SW579细胞恶性生物学行为的影响及其分子机制。方法：收集2017年10月至2018年12月青海省人民医院收治的20例甲状腺癌患者的癌组织及癌旁组织标本，用qPCR检测甲状腺癌组织和对应癌旁组织中SNHG14与miR-433-3p的表达；根据转染物的不同，将SW579细胞分为si-NC组（转染si-NC）、si-SNHG14组（转染si-SNHG14）、miR-NC组（转染miR-NC）、miR-433-3p mimic组（转染miR-433-3p mimic）、si-SNHG14+anti-miR-NC组（共转染si-SNHG14与anti-miR-NC）和si-SNHG14+anti-miR-433-3p组（共转染si-SNHG14与anti-miR-433-3p）。MTT法、FCM、Transwell实验分别检测转染后SW579细胞的增殖能力、细胞周期、细胞凋亡率、迁移及侵袭能力的改变；利用双荧光素酶报告基因实验检测SNHG14是否可结合miR-433-3p，qPCR法检测SNHG14与miR-433-3p之间的相互调控关系。结果：SNHG14在甲状腺癌组织中的表达高于癌旁组织（P<0.05），而miR-433-3p的表达水平低于癌旁组织（P<0.05）。抑制SNHG14的表达或过表达miR-433-3p可使SW579细胞增殖能力降低（P<0.05）、迁移与侵袭细胞数减少（均P<0.05）、细胞凋亡率升高（P<0.05）、G1期细胞比例升高（P<0.05）且S期细胞比例降低（P<0.05）。双荧光素酶报告基因实验证明SNHG14可结合miR-433-3p，抑制SNHG14的表达可提高SW579细胞中miR-433-3p水平（均P<0.05）。同时抑制miR-433-3p 和SNHG14的表达可部分逆转后者对SW579细胞的增殖、凋亡、迁移和侵袭的作用（均P<0.05）。结论：甲状腺癌组织中lncRNA SNHG14呈高表达、miR-433-3p呈低表达，lncRNA SNHG14可通过靶向结合miR-433-3p促进甲状腺癌SW579细胞的增殖、迁移、侵袭而抑制细胞凋亡。

Effect of Rhizoma Drynariae total flavonoids on ER-P38/MAPK pathway of memory impaired mice / 国际中医中药杂志

Objective:To study the effect of total flavonoids of Rhizoma Drynariae on learning and memory impairment mice induced by sodium nitrite. Methods:75 mice were divided into blank group, model group, Kangnaoshuai capsule group, Rhizoma Drynariae total flavonoids group and Rhizoma Drynariae total flavonoids+inhibitor group according to the random number table method, with 15 mice in each group. The Kangnaoshui Capsule group was administered with Kangnaoshui Capsule 585 mg/kg, the Rhizoma Drynariae total flavonoids group was administered with the Rhizoma Drynariae total flavonoids 97.5 mg/kg, the Rhizoma Drynariae total flavonoids group and the inhibitor group were administered with the Rhizoma Drynariae total flavonoids by intragastric administration 97.5 mg/kg, and intraperitoneal injection of 0.072 mg/kg ICI182780 for 21 days, once a day. The model was established on the 22nd day. Except for the blank group, the other mice were injected with sodium nitrite intraperitoneally to replicate the mice model with impaired learning and memory capability. The learning and memory capabilit of mice were detected with water maze method, and the estrogen receptor in hippocampus was detected by immunohistochemistry β (estrogen receptor β, ERβ). The expression of ERβ in hippocampus and the expression of phosphorylated P38 (P-P38) and the protein contents of B-cell lymphoma-2 (Bcl-2), Bcl-2 associated death promoter (Bad) and Caspase-3 in the apoptotic system was detected by Western blot. The kit was used to detect MDA,SOD and NO protein content in hippocampus. Results:The latency of Rhizoma Drynariae total flavonoids group was significantly shorter than the model group, the number of crossing platform and the residence time in the target quadrant were significantly increased ( P<0.01); The expression of ERβ Protein in mice hippocampus (0.371 ± 0.010 vs. 0.124 ± 0.009), Bcl-2 protein (1.146 ± 0.028 vs. 0.726 ± 0.016) and the contents of SOD [(153.657 ± 6.385) U/mg vs. (67.719±5.845) U/mg] increased significantly ( P<0.01); The expression of P-P38/P38 protein (0.412 ± 0.043 vs.0.806 ± 0.069), Bad protein (0.421 ± 0.010 vs.0.633 ± 0.010), Caspase-3 protein (0.923 ± 0.042 vs.1.437 ± 0.033), and the content of MDA [(8.669 ± 0.662) nmol/mg vs. (11.772 ± 1.054) nmol/mg] and NO [(4.259 ± 0.225) nmol/mg vs. (10.805 ± 0.415) nmol/mg] decreased significantly ( P<0.01). In addition, ER blocker can antagonize the above recovery and improvement effects of Rhizoma Drynariae total flavonoids group. Conclusion:Rhizoma Drynariae total flavonoids can regulate memory impairment, inhibit neuronal apoptosis and reduce oxidative stress in sodium nitrite model mice through ER-P38/MAPK signal pathway.

Effect of baicalein on the expression of glutamate receptor related protein in PC12 cells damaged by Aβ 25-35 / 国际中医中药杂志

Objective:To study the effect of baicalein on the expression of glutamate receptor related protein in PC12 cells injured by Aβ 25-35. Methods:PC12 cells were divided into control group, model group, estradiol group and baicalein group with different concentrations. The survival condition of PC12 cells in each group were detected by thiazole blue (MTT). PC12 cells were divided into control group, model group, estradiol group and baicalein group. The control group and model group were cultured with DMEM medium, and the estradiol group was added with 1×10 -3 μmol/L estradiol DMEM medium, baicalein group was added with 1 μmol/L baicalein DMEM medium. After 2 hours of intervention, 20 μmol/L Aβ 25-35 was added to the model group, estradiol group and baicalein group with induced PC12 cell injury. After 22 hours of intervention, flow cytometry was used to detect the apoptosis of PC12 cells. The expression of estrogen receptor β (ER β), phosphorylated c-Jun N-terminal kinase (p-JNK/JNK) and ionic receptor N-methyl-D-aspartate receptor 1 (NMDAR1), glutamate receptor 2 (GluR2) and calcium/calmodulin dependent protein kinase Ⅱ (CaMK Ⅱ) were detected by Western blot. Results:Compared with model group, 1 μmol/L baicalein significantly increased the proliferation rate [(95.80±2.47)% vs. (64.34±3.84)%]. The apoptosis rate of PC12 cells[(7.83±0.67)% vs. (12.84±0.91)%] was significantly decreased in baicalein group ( P<0.01). The expression of NMDAR1 (0.582±0.012 vs. 0.352±0.012), GluR2(0.538±0.017 vs. 0.355±0.006), ER β (0.362±0.015 vs. 0.262±0.018) in baicalein group were significantly increased ( P<0.01), the expression of p-JNK/JNK (0.476±0.013 vs. 0.752±0.014) and CaMK Ⅱ(0.499±0.019 vs. 0.670±0.016) in baicalein group were significantly decreased ( P<0.01). Conclusions:Baicalein has a protective effect on PC12 cells injured by Aβ 25-35. Its mechanism may be related to the inhibition of p-JNK/JNK activity by activating ERβ and regulating the expression of glutamate receptor related protein.

Influence of group health care model during pregnancy on midwifery based primipara′s self-efficacy and quality of life / 中华健康管理学杂志

Objective:To explore the influence of a midwife-led group health care model on primiparas′ self-efficacy and quality of life.Methods:The study included 200 primiparas who registered with the obstetrics department of our hospital between January and December 2019. The puerperas were divided into two groups with 100 cases each according to the random number table method. The control group received routine health care during pregnancy. The T-test and χ 2 test were used, while the observation group received midwifery-led group health care during pregnancy. The scores of maternal role adaptability, self-efficacy, weight control, delivery mode, breastfeeding, mental state, and quality of life was compared between the two groups. Results:After nursing, the mother′s role adaptability (63.14±9.38) and self-efficacy (34.16±2.89) scores in the observation group were higher than those in the control group (52.89±8.41 and 31.28±2.43, respectively) ( t=8.136, 7.627, P<0.05). The weight gain of the observation group in the third trimester [(3.68±1.22) kg] was less than that of the control group [(5.49±1.76) kg] ( t=8.452, P<0.05). The vaginal natural delivery rate of the observation group was 91% higher than the 71% of the control group (χ2=12.966, P<0.05), the cesarean section rate of the observation group was 9% lower than the 29% of the control group (χ2=12.966, P<0.05), and the exclusive breastfeeding rate in the observation group was higher than that in the control group ( χ2 =6.258, P<0.05). After nursing, the SAS (40.74±4.93) and SDS scores (42.16±5.07) of the observation group were lower than those of the control group (47.10±5.27 and 48.59±5.42, respectively) ( t=8.813, 8.664, P<0.05), and the four-dimension quality of life scores of the observation group were higher than those of the control group ( t=7.293, 7.406, 7.357, 8.767, P<0.05). Conclusion:A midwife-led group pregnancy care model can effectively enhance the self-efficacy of primiparas and improve their quality of life.

Effects of Naringin on neuronal apoptosis in mice with memory consolidation disorder / 国际中医中药杂志

Objective:To observe the effect of Naringin on neuronal apoptosis in mice with memory consolidation disorderinduced by sodium nitrite.Methods:Fifty mice were randomly divided into blank group, model group, standardized protocol group, high-dose Naringin group and low-dose Naringin group, with 10 mice in each group. The standardized protocol group was given Donepezil 1 mg/kg, the Naringin high and low dose groups were gavaged with Naringin solution 100 and 50 mg/(kg·d), blank group and model group were gavaged with equal volume of distilled water once a day for 21 days. The model was established on the 22nd day. The blank group was intraperitoneally injected with normal saline, and the other groups were intraperitoneally injected with 100 mg/(kg·d) sodium nitrite solution for 7 days. The cognitive ability of mice in each group was evaluated by platform jumping test, and the hippocampal synaptic structure was observed by electron microscope. The contents of acetylcholine (ACh), SOD, MDA and NO in hippocampus and the activity of choline acetyltransferase (ChAT) and acetylcholinesterase (AChE) was detected by ELISA. The expression of N-methyl-D-aspartate receptor (NMDAR), glutamine receptor 2 (GluR), calcium/calmodulin dependent protease Ⅱ (CaMK Ⅱ), Caspase-3, Bcl-2 and Bad proteins in hippocampus of model mice were detected by Western blot.Results:The number and morphology of hippocampal neurons were normal, nucleus, mitochondria, rough endoplasmic reticulum and synaptic membrane of hippocampal neurons in high-dose Naringin group were clear. Compared with the model group, the latency of mice in the high-dose Naringin group was prolonged and the number of errors was reduced ( P<0.01). The levels of MDA and NO in hippocampus of mice in the high-dose Naringin group significantly decreased ( P<0.01), and the activity of SOD significantly increased ( P<0.01). The content of ACh (23.682 ± 2.835 μg/mg prot vs. 14.939 ± 2.901 μg/mg prot), ChAT (163.302 ± 21.278 U/g vs. 89.612 ± 11.497 U/g) increased, AChE (0.367 ± 0.015 U/mg prot vs. 0.471 ± 0.014 U/mg prot) activity decreased ( P<0.01); The expression of Bad (0.441 ± 0.010 vs. 0.633 ± 0.010), Caspase-3 (0.425 ± 0.036 vs. 0.537 ± 0.024) significantly decreased, and the expression of Bcl-2 (0.890 ± 0.014 vs. 0.727 ± 0.009) significantly increased ( P<0.01); The expression of CAMKⅡ (1.043 ± 0.037 vs. 1.475 ± 0.043) significantly decreased ( P<0.01), and the expression of NMDAR1 (0.407 ± 0.037 vs. 0.345 ± 0.012), GluR2 (1.125 ± 0.033 vs. 0.664 ± 0.023) significantly increased ( P<0.01). Conclusion:Naringin could play the role of protecing the neuron and improving the cognition of mice with memory consolidation disorder by regulating the balance of ACh and glutamate system and reducing neuronal apoptosis and antioxidant stress.

Protection and mechanism of neoeriocitrin on Aβ 25-35 injured PC12 cells / 国际中医中药杂志

Objective:To study the protective effect of neoeriocitrin on PC12 cell injury induced by amyloid β protein fragment 25-35 (Aβ 25-35), and explore its role in preventing and treating AD. Methods:The MTT method was used to detect the effect of Neoeriocitrin on the proliferation of normal PC12 cells and Aβ 25-35 damaged PC12 cells, and the intervention concentration of neoeriocitrin solution was screened. The PC12 cells were divided into the normal control group, model group, estradiol group and neoeriocitrin group according to the random number table method. The normal control group and model group were cultured with DMEM for 24 h; DMEM and 1×10 -3 μmol/L estradiol solution were added to the estradiol group; DMEM and 6×10 4 μmol/L neoeriocitrin solution were added to the neoeriocitrin group. After 2 hours of culture, except for the normal control group, the remaining groups were added with 20 μmol/L Aβ 25-35 stock solution, and the culture was continued for 22 h. AnnexinV-FITC/PI double labeling was used to detect apoptosis rate, Western blot method was used to detect estrogen receptor β (estrogen receptor β, ERβ) and p-P38/P38 protein expression. The content of acetylcholine (ACh) was detected, and the activity of Choline acetyl transferase (ChAT) and Acetylcholin esterase (AChE) in the supernatant of PC12 cells were detected. Results:Compared with the model group, the cell apoptosis rate [(8.080 ± 0.578)% vs. (18.500 ± 0.870)%] significantly decreased ( P<0.01), the expression of ERβ protein (0.348 ± 0.042 vs. 0.273 ± 0.006) significantly increased ( P<0.01), p-P38/P38 protein expression (0.372 ± 0.058 vs. 0.571 ± 0.063) significantly decreased ( P<0.01), the content of ACh [(14.319 ± 1.039) μg/mg vs. (9.157 ± 1.605) μg/mg], ChAT activity [(0.715 ± 0.053) U/mg vs. (0.280 ± 0.093) U/mg] significantly increased ( P<0.01), AChE activity [(2.607 ± 2.048) U/mg vs. (6.038 ± 1.867) U/mg] significantly reduced ( P<0.01). Conclusions:Neoeriocitrin can promote the proliferation of PC12 cells damaged by Aβ25-35, inhibit cell apoptosis, and has a certain cytoprotective effect. Its mechanism may be related to the regulation of ERβ expression and inhibition of P38 protein phosphorylation, thereby improving the function of the cholinergic system related.

Total flavonoids of Drynariae Rhizoma regulates ER-p38 MAPK signaling pathway to improve scopolamine-induced learning and memory impairments in model mice / 中国中药杂志

This study intended to explore the effect and mechanism of total flavonoids of Drynariae Rhizoma in improving scopola-mine-induced learning and memory impairments in model mice. Ninety four-month-old Kunming(KM) mice were randomly divided into six groups. The ones in the model group and blank group were treated with intragastric administration of normal saline, while those in the medication groups separately received the total flavonoids of Drynariae Rhizoma, Kangnaoshuai Capsules, donepezil, as well as total flavonoids of Rhizoma Drynariae plus estrogen receptor(ER) blocker by gavage. The mouse model of learning and memory impairments was established via intraperitoneal injection of scopolamine. Following the measurement of mouse learning and memory abilities in Morris water maze test, the hippocampal ERβ expression was detected by immunohistochemistry, and the expression levels of ERβ and phosphorylated p38(p-p38) in the hippocampus and B-cell lymphoma 2(Bcl-2), Bcl-2-associated death promoter(Bad), and cysteinyl aspartate-specific protease-3(caspase-3) in the apoptotic system were assayed by Western blot. The contents of malondia-ldehyde(MDA), superoxide dismutase(SOD), and nitric oxide(NO) in the hippocampus were then determined using corresponding kits. Compared with the control group, the model group exhibited significantly prolonged incubation period, reduced frequency of cros-sing the platform, shortened residence time in the target quadrant, lowered ERβ, Bcl-2 and SOD activity in the hippocampus, and increased p-p38/p38, Bad, caspase-3, MDA, and NO. Compared with the model group, the total flavonoids of Rhizoma Drynariae increased the expression of ERβ and SOD in the hippocampus, down-regulated the expression of neuronal pro-apoptotic proteins, up-re-gulated the expression of anti-apoptotic proteins, and reduced p-p38/p38, MDA, and NO. The effects of total flavonoids of Drynariae Rhizoma on the above indexes were reversed by ER blocker. It has been proved that the total flavonoids of Drynariae Rhizoma obviously alleviate scopolamine-induced learning and memory impairments in mice, which may be achieved by regulating the neuronal apoptotic system and oxidative stress via the ER-p38 mitogen-activated protein kinase(ER-p38 MAPK) signaling pathway.

Screening, identification and antagonistic effect evaluation of biocontrol strains to Asarum leaf blight / 中国中药杂志

Leaf blight is the main disease of Asarum. At present, chemical treatment is main measure for disease control, and there is no report on biological control. In order to achieve the biological control of Asarum leaf blight, the biocontrol strains with antagonistic effect on Asarum leaf blight were screened. The rhizosphere bacteria of healthy Asarum plants were isolated by soil dilution method, and the isolated strains were screened by the methods of antagonistic antifungal and fermentation liquid antifungal, then the strains were identified and the control effect in vivo was determined. Abiocontrol bacterial strains S2-31 which with high antagonism to leaf blight was obtained from more than 100 isolated strains. The inhibitory rates of antagonistic antifungal and fermentation liquid antifungal reached 92.47% and 60.56%, respectively. It was identified by morphology and 16 S rDNA sequence analysis, and the strain was identified as Brevibacillus laterosporus. The results of indoor potted experiment showed that the control effect was 79.87%, 71.44% and 66.82% on the 3 rd, 5 th and 7 th day after inoculation, respectively, which indicated that S2-31 could reduce the disease index and control the development of Asarum leaf blight.

Analysis of metabolites of 4,5-dicaffeoylquinic acid in rat plasma and urine based on LC-MS / 中国中药杂志

Ultra high performance liquid chromatography tandem high field orbital trap mass spectrometry(UPLC-Orbitrap Elite-MS/MS) method was applied in this paper to analyze the metabolites of 4,5-dicaffeoylquinic acid in rat plasma and urine after oral administration. A gradient elution was performed by using Thermo C_(18) column(2.1 mm×100 mm, 1.9 μm), with 0.1% formic acid solution-acetonitrile as the mobile phase. Mass spectral data of biological samples were collected in negative ion mode. The data were extracted by Compound Discovery 2.1 software. Then the blank group samples and the drug samples were compared for exact molecular weight and the mass fragmentation information, and the secondary fragment fitting ratio was calculated to finally attribute the metabolites. As a result, 15 metabolites were detected in rat plasma, and 16 metabolites were detected in urine. The involving metabolic reactions included methylation, hydration, dehydration, reduction, glucuronide conjugation, and sulfation reaction. The metabolites in plasma and urine complemented each other and initially revealed the migration and excretion patterns of this compound in the body. A method for pre-processing biological samples, high-resolution LC-MS instrumentation data, and qualitative software was established in this study to identify metabolite structures, laying the foundation for the study of the active ingredients and in vivo pharmacodynamics forms of Chinese medicines.

Effect of Naringenin on Oxidative Stress and Tau Protein Phosphorylation of Aβ25-35-induced PC12 Cell Injury / 中国实验方剂学杂志

Objective:To investigate the effects of naringenin on oxidative stress and Tau protein phosphorylation of adrenal pheochromocytoma（PC12） cells injured by β-amyloid（Aβ）25-35 and its relationship with estrogen receptor（ER） and phosphatidylinositol -3 kinase/protein kinase B（PI3K/Akt） signaling pathway. Method:The PC12 cells were intervened with Aβ25-35 to prepare the injury model. The experiment was divided into blank group， model group， naringenin（400，40，4，0.4，0.04，4×10-3，4×10-4，4×10-5 μmol·L-1）group， positive drugs estradiol（E2）（1 nmol·L-1）+Aβ25-35 group， naringenin（0.4，0.04，4×10-3，4×10-4，4×10-5 μmol·L-1）+Aβ25-35 group， E2+Aβ25-35+ER antagonist（ICI182780）（1 μmol·L-1） group， naringenin+Aβ25-35+ICI182780 group， E2+Aβ25-35+PI3K blocker（LY294002）（50 μmol·L-1） group， naringenin+Aβ25-35+LY294002 group. Methye thiazolye telrazlium（MTT）method was used to detect the cell proliferation index， 2'，7'-Dichlorodi -hydrofluorescein diacetate（DCFH-DA） was used as a fluorescent probe to detect the content of reactive osygen species（ROS）， the content of malondialdehyde（MDA） and the activity of superoxide dismutase（SOD） were measured by thiobarbituric acid（TBA） and oxidase methods， Western blot was used to detect the expression of phosphorylated Tau protein/total Tau protein（p-Tau/t-Tau）. Result:According to the results of MTT experiment， 0.4 μmol·L-1 was selected as the best effective concentration of naringenin， compared with the blank group， the cell proliferation index of model group decreased significantly （P<0.01）， compared with model group， the cell proliferation index of naringenin+Aβ25-35 group increased significantly （P<0.01）. In addition， compared with blank group， the content of ROS， MDA and the expression of p-Tau/t-Tau in the model group increased significantly （P<0.01）， and the activity of SOD decreased significantly （P<0.01）， compared with model group， the content of ROS， MDA and the expression of p-Tau/t-Tau in naringenin+Aβ25-35 group decreased significantly （P<0.01）， and the activity of SOD increased significantly （P<0.01）， compared with naringenin+Aβ25-35 group， the addition of ICI182780 and LY294002 significantly reversed the role of naringenin in the above indicators （P<0.01）. The effect of naringenin was similar to that of E2. Conclusion:Naringenin can improve the cell proliferation index and protect PC12 cells from Aβ25-35 injury， which may be achieved by activating ER and PI3K/Akt signaling pathway to reduce ROS， MDA content， p-Tau/t-Tau expression and promote SOD activity.

The mechanism of anti-proliferative scar of psoralen / 国际中医中药杂志

Objective:To investigate the mechanism of anti-proliferative scar of psoralen.Methods:Fibroblasts were cultured in vitro. The fibroblasts were divided into normal group (normal fibroblasts), scar group (hypertrophic scar fibroblasts), and TGF-β1 group (10 ng/ml TGF-β1 treated hypertrophic scar fibrils cells 5 min-12 hours), Smurf2 RNA interference group (Smurf2 siRNA transfected hypertrophic scar fibroblasts for 72 hours), psoralen group (10 μmol/L psoralen treatment of hypertrophic scar fibroblasts for 72 hours). The psoralen+TGF-β1 group (proliferative scar fibroblasts were added to the psoralen for 72 hours and then added to TGF-β1 for 6 hours). The expressions of Smurf2 and α-SMA protein were detected by Western blot method. The expression of type I collagen mRNA was detected by RT-PCR. The secretion of TGF-β1 protein was detected by ELISA.Results:Compared with the normal group, the expression of Smurf2 protein (0.83 ± 0.08 vs. 0.38 ± 0.07) in the scar group significantly increased ( P<0.05). Compared with the scar group, the expression of TGF-β1 (2.2 ± 0.18 vs. 4.2 ± 0.47) significantly decreased in Smurf2 RNA interference group ( P<0.05). The expression of Smurf2 (0.71 ± 0.06 vs. 0.42 ± 0.04) and α-SMA (1.42 ± 0.12 vs. 0.91 ± 0.09) proteinin the TGF-β1 group significantly increased ( P<0.05), and the expression of type I collagen mRNA (0.72 ± 0.09 vs. 0.41 ± 0.07) significantly increased ( P<0.05). The expression of Smurf2 (0.05 ± 0.01 vs. 0.42 ± 0.04) and α-SMA (0.71 ± 0.07 vs. 0.91 ± 0.09) proteinin in psoralen group significantly decreased ( P<0.05). The expression of collagen mRNA (0.12 ± 0.04 vs. 0.41 ± 0.07) significantly decreased ( P<0.05). Conclusions:Psoralen may inhibit the expression of α-SMA protein and decrease the expression of type I collagen by TGF-β1/Smurf2 signaling to inhibit scar formation.

Metformin mediated reverse cholesterol transport to inhibit atherosclerosis / 中国药理学通报

Aim To investigate the molecular mechanism of metformin inhibiting atherosclerosis in ApoE 1_ mice by reverse cholesterol transport. Methods Eighteen ApoE -/ _ mice were randomly divided into three groups, control group, model group and metformin group, and body weight changes were monitored weekly. Blood samples were taken to measure serum lipid levels; animal ultrasound was used to measure abdominal aortic wall thickness; HE and oil red 0 staining were used to evaluate the degree of liver steatosis; Western blot was used to detect the expression of liver cholesterol reverse transport-related proteins LXRa and ABCA1. Results Compared with control group, the body weight, serum T C, T G, and LDL in model group increased, HDL decreased(P <0. 05), abdominal aortic wall thickened (P <0. 05), liver fat deposition increased, and L X R a, ABCA1 expression was reduced. In metformin group, body weight, serum T C, T G, LDL decreased, HDL increased (P <0. 05), liver fat deposition and abdominal aortic wall thickness were significandy reduced (P <0. 05), and LXRa and ABCA1 expressions markedly increased (P <0. 0 5). Conclusions Metformin can delay the progression of atherosclerosis by up-regulating the expression of liver cholesterol reverse transport related proteins LXRa and ABCA1, enhancing liver reverse cholesterol transport, regulating blood lipid metabolism and reducing liver lipid deposition.

Clinical application and mechanism of traditional Chinese medicine in treatment of lung cancer / 中华医学杂志(英文版)

Lung cancer is a malignant tumor characterized by a rapid proliferation rate, less survivability, high mortality, and metastatic potential. This review focuses on updated research about the clinical application of traditional Chinese medicine (TCM) as an adjuvant therapy to lung cancer treatment and the mechanisms of TCM effect on lung cancer in vitro and in vivo. We summarized the recent 5 years of different research progress on clinical applications and antitumor mechanisms of TCM in the treatment of lung cancer. As a potent adjuvant therapy, TCM could enhance conventional treatments (chemotherapy, radiation therapy, and epidermal growth factor receptors [EGFRs] tyrosine kinase inhibitors [TKIs]) effects as well as provide synergistic effects, enhance chemotherapy drugs chemosensitivity, reverse drug resistance, reduce adverse reactions and toxicity, relieve patients' pain and improve quality of life (QOL). After treating with TCM, lung cancer cells will induce apoptosis and/or autophagy, suppress metastasis, impact immune reaction, and therapeutic effect of EGFR-TKIs. Therefore, TCM is a promisingly potent adjuvant therapy in the treatment of lung cancer and its multiple mechanisms are worthy of an in-depth study.

Epidemiological characteristics and its trends of other infectious diarrhea diseases in infants in Inner Mongolia Autonomous Region,2005-2016 / 中华传染病杂志

Objective To analyze the epidemiological characteristics and its trends of other infectious diarrhea diseases in infants in Inner Mongolia Autonomous Region.Methods Statistical analysis was conducted on other infectious diarrhea cases of infants in Inner Mongolia Autonomous Region from China Information System for Disease Prevention and Control from 2005 to 2016.The main methods were descriptive epidemiology for population,area and time distribution of these registered cases in Inner Mongolia Autonomous Region.The trends were analyzed by the ratio of fixed base and ring base.Area map method was used for regional differences.Results From 2005 to 2016,17 760 other infectious diarrhea diseases of infants were reported in Inner Mongolia Autonomous Region,accounting for 58％of the total reposed cases.The cases number and incidence showed an overall upward trend.After 2011,the growth rate of case reports and incidences slowed down relatively.The peak of the incidence was in July and August(4 739 cases),accounting for27％of cases of the whole year.Seventy-three point forty-four percent of the cases were located in Hulunbeier City(5 161 cases,29.06％),Hohhot City(4 465 cases,25.14％)and Baotou City(3 417 cases,19.24％).Except for Wuhai City.the remaining 11 cities showed increased incidence of other infectious diarrhea diseases in infants.The ratio of male to female was 1.55∶1,and the incidence in males was higher than that in females every year.Twelve-month-old(5 800 cases,33％)had the greatest proportion.Clinical diagnosis(56.26％)and confirmed diagnosis(43.51％)were the main categories,but the rate of pathogen labeling was only 7.60％.Conclusions After 2011,the incidence of other infectious diarrhea diseases of infants in Inner Mongolia Autonomous Region have slowed down relatively.However,the incidence has significant time,region and population aggregation.

Epidemiological characteristics and its trends of other infectious diarrhea diseases in infants in Inner Mongolia Autonomous Region, 2005-2016 / 中华传染病杂志

Objective@#To analyze the epidemiological characteristics and its trends of other infectious diarrhea diseases in infants in Inner Mongolia Autonomous Region.@*Methods@#Statistical analysis was conducted on other infectious diarrhea cases of infants in Inner Mongolia Autonomous Region from China Information System for Disease Prevention and Control from 2005 to 2016. The main methods were descriptive epidemiology for population, area and time distribution of these registered cases in Inner Mongolia Autonomous Region. The trends were analyzed by the ratio of fixed base and ring base. Area map method was used for regional differences.@*Results@#From 2005 to 2016, 17 760 other infectious diarrhea diseases of infants were reported in Inner Mongolia Autonomous Region, accounting for 58% of the total reported cases. The cases number and incidence showed an overall upward trend. After 2011, the growth rate of case reports and incidences slowed down relatively. The peak of the incidence was in July and August (4 739 cases), accounting for 27% of cases of the whole year. Seventy-three point forty-four percent of the cases were located in Hulunbeier City (5 161 cases, 29.06%), Hohhot City (4 465 cases, 25.14%) and Baotou City (3 417 cases, 19.24%) . Except for Wuhai City, the remaining 11 cities showed increased incidence of other infectious diarrhea diseases in infants. The ratio of male to female was 1.55∶1, and the incidence in males was higher than that in females every year. Twelve-month-old (5 800 cases, 33%) had the greatest proportion. Clinical diagnosis (56.26%) and confirmed diagnosis (43.51%) were the main categories, but the rate of pathogen labeling was only 7.60%.@*Conclusions@#After 2011, the incidence of other infectious diarrhea diseases of infants in Inner Mongolia Autonomous Region have slowed down relatively. However, the incidence has significant time, region and population aggregation.

Analysis of genomic characteristics of influenza A (H1N1) pdm09 viruses in Inner Mongolia, 2013-2017 / 中华实验和临床病毒学杂志

Objective@#To evaluate the effect of vaccine and provide scientific evidence for prevention and control of influenza virus, this study aims to analyze the characteristics of genomic variation of influenza A (H1N1) pdm09 viruses in Inner Mongolia.@*Methods@#The 16 viral strains were selected randomly according to the influenza A (H1N1) pdm09 viruses isolated from network laboratories in Inner Mongolia, 2013-2017. The hemagglutinin(HA) and neuraminidase(NA) genomic sequences were obtained by using RT-PCR and sequencing, and genomic characteristics were analyzed via bioinformatics.@*Results@#Compared to the A/California/07/2009 vaccine strain, the relatively obvious variation of antigen of influenza A (H1N1) pdm09 viruses in Inner Mongolia since 2014, and the vaccine provided a poor protection to influenza A (H1N1) pdm09 virus infection, while the A/Michigan/45/2015 vaccine strain recommended by WHO recently has a satisfactory protective effects. Several viral isolates from Inner Mongolia increased the binding force of virus in human upper respiratory tract because of D222N and D222G substitution within HA. E119K and H275Y substitution within NA gene of viral strains, suggesting that the viruses were resistant to NA inhibitors.@*Conclusions@#The influenza A (H1N1) pdm09 viruses had gradual variations as time went on, and the WHO recommended vaccine was relatively lagging. Virulent strains and drug-resistant strains appeared in the population, and the genetic characteristics of influenza virus surveillance should be strengthened to find the new mutants of virus in time, which provide evidence for the prevention and control of influenza.