Expression and clinicopathological significance of Bcl - 2 and Bax genes in colorectal cancer patients complicated with schistosomiasis / 中国血吸虫病防治杂志

Objective To investigate the expression and clinicopathological significance of Bcl-2 and Bax genes in colorectal cancer (CRC) patients complicated with schistosomiasis. Methods The CRC patients receiving surgical treatment in the First Affiliated Hospital of Dali University from June 2016 to June 2020 were recruited as the study subjects, and 30 subjects were randomly sampled from the CRC patients complicated with schistosomiasis (CRC-S group) and 30 subjects were randomly sampled from the CRC patients without schistosomiasis (CRC group) using a random number table method. The cancer specimens were sampled from subjects in the CRC-S and CRC groups, and the peri-cancer specimens were sampled from subjects in the CRC group. The Bcl-2 and Bax expression was quantified in cancer and peri-cancer specimens using a real-time fluorescent quantitative PCR (qPCR) assay and immunohistochemistry at transcriptional and translational levels, and the cell apoptosis was detected in cancer specimens using HE staining. Results A total of 60 subjects were enrolled, including 30 cases in the CRC group and 30 cases in the CRC-S group. There were no significant differences between the two groups in terms of gender distribution (χ2 = 0.271, P > 0.05), mean age (t = -0.596, P > 0.05), tumor growth pattern (χ2 = 0.275, P > 0.05), tumor location (χ2 = 4.008, P > 0.05), tumor invasion depth (χ2 = 0.608, P > 0.05), degree of tumor differentiation (χ2 = 0.364, P > 0.05), or presence of vascular metastasis (χ2 = 1.111, P > 0.05), while significant differences were seen between the two groups in terms of histological type, presence of lymph node metastasis and TMN staging (χ2 = 5.963, 8.297 and 5.711, all P values < 0.05). qPCR assay and immunohistochemistry quantified significantly higher Bcl-2 and Bax expression in cancer specimens from the CRC and CRC-S groups than in the peri-cancer specimens from the CRC group at both translational and transcriptional levels (all P values < 0.05), and higher Bcl-2 and lower Bax expression were seen in the cancer specimens from the CSC-S group than that from the CRC group (all P values < 0.05). In addition, the cell apoptotic rate was significantly greater in the cancer specimens in the CRC group than in the CRC-S group (42.00% vs. 23.35%; χ2 = 41.500, P = 0.000). Conclusion Schistosomiasis may be involved in the development and progression of CRC through affecting Bcl-2 and Bax gene expression in the apoptosis signaling pathway.

Outcomes of surgical patch angioplasty of the coronary artery for diffuse coronary artery disease

Abstract Introduction: Diffuse coronary artery disease (CAD) has a poor prognosis and many patients are ineligible for conventional coronary artery bypass grafting (CABG). This study evaluated the 12-month outcomes of coronary artery reconstruction and surgical patch angioplasty of the coronary artery for diffuse CAD. Methods: A retrospective cohort study of patients who underwent CABG with surgical patch angioplasty of the coronary artery (reconstruction group) or standard CABG alone (standard group) at the Cardiovascular Surgery Department of the local Hospital between January 2014 and January 2016. Follow-up was censored at 12 months after surgery. Results: Cardiopulmonary bypass and aortic cross-clamping durations were longer in the reconstruction group (n=32) than in the standard group (n=125) (P<0.05). There were no differences in graft blood flow and postoperative levels of cardiac markers between the two groups (P>0.05). In the reconstruction group, one patient died; a vein graft showed occlusion. In the standard group, two patients died; one left internal mammary artery graft and three vein grafts showed occlusion. There were no significant differences in mortality, major adverse cardiovascular and cerebrovascular events, and patency between the two groups (P>0.05). Conclusion: Coronary artery reconstruction and surgical patch angioplasty of the coronary artery can be performed for diffuse CAD. Patient outcomes were not significantly different from those of patients who underwent standard CABG.

Role of adiponectin in diabetes myocardial ischemia-reperfusion injury and ischemic postconditioning

Abstract Purpose Patients with diabetes are vulnerable to myocardial I/R (ischaemia/reperfusion) injury, but are not responsive to IPO (ischaemic post-conditioning). We hypothesized that decreased cardiac Adiponectin (APN) is responsible for the loss of diabetic heart sensitivity to IPO cardioprotecton. Methods Diabetic rats were subjected to I/R injury (30 min of LAD occlusion followed by 120 min of reperfusion). Myocardial infarct area was determined by TTC staining. Cardiac function was monitored by a microcatheter. ANP, 15-F2t-isoprostane, nitrotyrosine and MDA were measured by assay kits. Levels of p-Akt, total-Akt and GAPDH were determined by Western Blot. Results Diabetic rats subjected to myocardial IR exhibited severe myocardial infarction and oxidative stress injury, lower APN in the plasma and cardiac p-Akt expression ( P <0.05). IPO significantly attenuated myocardial injury and up-regulated plasma APN content and cardiac p-Akt expression in non-diabetic rats but not in diabetic rats. Linear correlation analysis showed that the expression of adiponectin was positively correlated with p-Akt and negatively correlated with myocardial infarction area ( P <0.01). Conclusion Protective effect of IPO was tightly correlated with the expression of adiponectin, exacerbation of I/R injury and ineffectiveness of IPO was partially due to the decline of adiponectin and inactivation of Akt in diabetes mellitus.

Effect of Mixed Inoculation of Arbuscular Mycorrhizal on Growth and Chemical Composition of Aucklandia lappa Seedlings / 中国实验方剂学杂志

Objective:To explore the synergistic effect of arbuscular mycorrhizal（AM） fungi mixed inoculation on the growth，physiological and biochemical characteristics，root biomass and terpenoid component accumulation of Aucklandia lappa seedlings，so as to provide a reference for the combination and application of the dominant complementary effect mycorrhizal fungi. Method:The effect of different AM fungi combined with inoculation on the root mycorrhizal infection rate，plant growth，physiological and biochemical characteristics，root biomass，costunolide and dehydrocostus lactone of A. lappa seedlings were determined by pot inoculation at room temperature. Result:It was found that AM fungi could form good mycorrhizal symbiosis with the roots of A. lappa.The formation of mycorrhizal symbiosis system could increase the chlorophyll content of A. lappa leaves，increase the activities of catalase（CAT），peroxidase （POD），superoxide dismutase （SOD），reduce the content of malondialdehyde（MDA），and promote photosynthesis of A. lappa. Compared with CK group，AM fungus treatment could significantly promote the accumulation of costunolide and dehydrocostus lactone，and the accumulation of its metabolites，costunolide and dehydrocostus lactone，into roots during the symbiotic cultivation of A. lappa seedlings，indirectly improving the quality of medicines and yield of alantolactone. Conclusion:Inoculation of AM fungi can improve the root mycorrhizal viability，increase the absorption of nutrients and promote the growth of woody incense.The mixed inoculation treatment of S2，S4 and S5 had the best mycorrhizal effect in artificial cultivation，and the growth and medicinal quality of A. lappa were the best，which provided technical support for the application and popularization of A. lappa mycorrhizal biotechnology.

Analysis of Chemical Variability on Different Processed Products of Glycyrrhiza uralensis Dry Roots and Rhizomes Based on UPLC-Q-TOF-MSE and Plant Metabolomics / 中国实验方剂学杂志

Objective:To identify the quality differential markers of different processed products of Glycyrrhiza uralensis dry roots and rhizomes. Method:Ultra-high performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MSE) was used to collect high-precision mass-charge ratio and ion response strength information of the components in G. uralensis dry roots and rhizomes before and after processing by negative ion mode. The data set collected after pretreatment was analyzed with principal component analysis (PCA) and orthogonal partial least squares-discriminant analysis (OPLS-DA) to quickly search the differential components in different processed products of G. uralensis dry roots and rhizomes. Differential components were identified according to the relative molecular weight, fragment ion, mass spectrum database and related literature information, then the migration of components before and after processing was studied. Result:A total of 10 quality differential markers were searched from raw products, roasted products and honey-roasted products of G. uralensis dry roots and rhizomes, mainly derivatives of liquiritin and glycyrrhizic acid. Among them, the contents of 6''-O-acetylliquiritin apioside, 6''-O-acetylliquiritin apioside isomer, 6''-O-acetylliquiritin, formononetin and 11-deoxo-18β-glycyrrhetic acid were the highest in the raw products, the contents of 6''-O-acetylisoliquiritin apioside, 6''-O-acetylisoliquiritin, isoliquiritin and glycyrrhetic acid 3-O-glucuronide were the highest in the roasted products, the content of liquiritin was the lowest in the honey-roasted products. Conclusion:There are some chemical differences among the three products. This study can provide material basis for the quality control and pharmacodynamic research of processed products of G. uralensis dry roots and rhizomes.

Analysis of psychological quality and influencing factors of a marine unit stationed at a reef / 第二军医大学学报

ObjectiveTo study the psychological quality of the soldiers stationed at a reef and their influencing factors, and to analyze the relationship between psychological quality, subjective evaluation of health and social support. MethodsA questionnaire survey was conducted on 100 soldiers stationed at a reef using the military psychology quality scale, self-test health rating scale and comprehension social support scale. The military psychology quality scale includes five dimensions: Intelligence, loyalty, courage, self-confidence and frustration. The self-test health rating scale includes three dimensions: Physical health, mental health, and social health. The comprehension social support scale includes three dimensions: Family support, friend support, and other support. The scores of the military psychological quality scale of the soldiers stationed at the reef were compared with the norm of military mental quality using independent-sample t test. Pearson correlation analysis was used to analyze the correlation between scores of each dimension and total scores for the three scales. Multivariate linear regression was used to analyze the influence between social support, healthy subjective evaluation and the psychological quality of soldiers stationed at the reef. ResultsThe scores of dimension confidence (calm+independent+sociable) of the soldiers were significantly better than the overall norm score (P=0.030), and the difference for the other 4 dimensions was not statistically significant between the soldiers and the norm (all P>0.05). Pearson correlation analysis showed that the scores of all dimensions and total scores were positively correlated between the three scales used in this study (all P<0.01), except for loyalty dimension of military psychology quality scale and social health dimension of self-test health rating scale (P=0.366). Multiple linear regression analysis showed that mental health was the inf luencing factor of the tolerance (P=0.006); family support and physical health were the influencing factors of mental health (P=0.022, P<0.001), and family support was the influencing factor of physical health (P=0.025). Conclusion The psychological quality of soldiers stationed at a reef is vulnerable to the environment of the reef. It is necessary to improve the psychological quality by strengthening social support and improving their own health awareness of the soldiers.

Mechanisms of pyroptosis induced by meticillin-resistant Staphylococcus aureus in macrophages / 国际药学研究杂志

Objective: To evaluate the effect of meticillin-resistant Staphylococcus aureus(MRSA)on the pyroptosis of bone-marrow derived macrophages(BMDM)and investigate the mechanism of MRSA-induced pyroptosis in macrophages. Methods: The BMDM were triggered by the combination of lipopolysaccharide(LPS, 100 ng/ml)with adenosine-triphosphate(ATP, 3 mmol/L)or nigericin(Ng, 10 mmol/L)or treated with MRSA(multiplicity of infection 200, MOI 200)alone to induce pyroptosis in vitro. The cell morphology examination and lactate dehydrogenase(LDH)assay were applied to evaluate the cytotoxicity. The expression of pro- inflammatory cytokines, the interleukin(IL)- 1β, IL- 6 and tumor-necrosis factor(TNF)-α was detected by ELISA. The cleaved caspase-1 and mature IL-1β in the cells and released into the supernatant were detected by Western blotting. The signal pathway for the induction of pyroptosis by MRSA was investigated via the transfection of lentivirus- mediated short- hairpin RNA(shRNA)into the BMDM. Results: The treatment of BMDM with LPS/ATP, LPS/nigericin or MRSA alone caused cytotoxicity and up-regulated the expression of pro-inflammatory cytokines, IL-1β, IL-6 and TNF-α, as well as the caspase-1 activation and mature Zl-1β (P<0.01). After silencing NLRP3 or NLRC4, the expression of IL-1β induced by MRSA was significantly lessened(P< 0.01). Conclusion: MRSA could induce BMDM pyroptosis probably via activating NLRP3 inflammasome or NLRC4 inflammasome.

Effect of daily average temperature on hand-foot-mouth disease incidence among children under 5 years old in Jingzhou / 中国学校卫生

Objective@#To evaluate the effect of daily temperature on hand-foot-mouth disease (HFMD) in children under 5 years old in Jingzhou city.@*Methods@#HFMD incidence data and meteorological data in Jingzhou city were obtained during 2010 and 2017. Distributed lag non-linear model (DLNM) was utilized to investigate the impact of daily temperature on HFMD incidence among children under 5 years old adjusting for potential confounders of other meteorological factors, secular trend, weekdays and holidays.@*Results@#A total of 47 525 cases were reported during 2010 to 2017, of which the ratio of male to female was 1.52. Children under 1 year old, 1-<3 years old, 3-5 years old accounted for 9.72%, 62.10%, and 28.18% of the total cases, respectively. Children cared at home and children care in kindergarten accounted for 73.29% and 26.71% of the total cases, respectively. The relationship between the temperature and the daily cases of HFMD in children under five years old was a ‘M’ pattern. Compared with a reference temperature (the 50 th percentile of average temperature during the study period, P 50), the maximum value of effect at 8.21 ℃ and 25.81 ℃ were 1.53(95%CI=1.33-1.76) and 1.47(95%CI=1.31-1.65). Higher temperatures (such as 25.81 ℃ in this paper) showed a long lag effect on the HFMD incidence compared with lower temperatures (such as 8.21 ℃). Subgroup analyses indicated that children aged 3-5 years (children who attended daycare) were more vulnerable to the effects of temperature changes on HFMD than those under 1 year old and 1-<3-year-old (cared at home).@*Conclusion@#The temperature has a significant impact on the HFMD incidence among children under five years old in Jingzhou. Daycare centers is the key place for prevention and control of HFMD.

Research progress on Chinese herbal medicine fermentation and profile of active substances derived / 中国中药杂志

Chinese herbal medicines( CHMs) are a class of preparations made from natural plants that pose health beneficial properties as well as illness prevention functions. Thanks to a panel of salutary features,such as comprehensive immunological enhancement and inhibition of pathogenic bacteria,negligible side-effects,inappreciable drug-resistance,CHMs have been taken as one of the costeffective candidates for antibiotics substitutions. Through probiotics fermentation,the enzymatic hydrolysis of matrixes of CHMs enables easier release of the active ingredient as well as endows less toxicity of the preparations derived. During fermentation,the macromolecule or polymers forms of the active ingredient can be cut down to smaller molecule,which favors the transmembrane transport and improve adsorption of the active ingredients by the tissues. Other than the enzymatic benefits,probiotics can produce metabolites that inhibit pathogenic bacteria propagation,which may function synergically with the inhibitory effects of the CHMs preparations to fight the target pathogens. In addition,the oligosaccharide like components of CHMs can promote the growth of probiotics in intestinal environment which may largely facilitate the gut health. To summarize,the fermentation of CHMs using probiotics brings about the biochemical reactions and elevates the health beneficial effects by synergy of the microbial and herbal activities. It has been proved to be one of promising approaches as to antibiotic substitutions,particularly in livestock and poultry breeding industries. This review covered the recent progress of CHMs fermentation on the aspects of microbial strains,patterns of fermentation and active substances from fermentation of CHMs and their potency,respectively.

The clinical research about early diagnosis of small cell lung cancer through mad2 de-tection / 中国肿瘤临床

Objective:To explore combined detection of mad2 with anti-nuclear mitotic spindle apparatus antibody(MSA)and anti-centromere antibody(ACA)and their clinical value for the diagnosis of small cell lung cancer(SCLC).Methods:One hundred and twen-ty SCLC patients,110 non-small cell lung cancer(NSCLC)patients,and 115 pulmonary nodule(PN)patients were enrolled in this study. The expression of mad2 was analyzed by qt-PCR.MSA and ACA were detected by indirect immunofluorescence(IIF)staining.Results:mad2 was overexpressed in SCLC and NSCLC samples(P<0.05).There were significant differences between the results obtained for SCLC and NSCLC samples by qt-PCR(P<0.05).AUC in ROC curve for mad2 expression was 0.799 with an intermediate diagnostic value. In the correlative analysis,the odds ratio of MSA and ACA was 6.94 and 5.60,respectively.In the correlation analysis,Kappa value of mad2 with MSA was 0.49,and Kappa value of mad2 with ACA was 0.42.In the parallel analysis,the sensitivity and specificity was 83.31% and 79.34%,respectively,while the Youden Index was 0.62.Moreover,in the serial analysis,the sensitivity and specificity was 65.32% and 93.35%,respectively,and the Youden Index was 0.59.Conclusions:In comparison with the NSCLC and PN samples,mad2 was overexpressed in SCLC samples.Therefore,mad2 ought to play a critical role in the pathology of SCLC.The combined expression of mad2 with MSA and ACA may contribute to enhancing the sensitivity and specificity of detection;this expression may allow early diag-nosis and clinical diagnosis of SLCC and may be a promising treatment for SCLC.

Modeling of H2O2-induced damage in retinal pigment epithelial cells and protective effects of blueberry anthocyanin / 中国药理学通报

Aim To establish the model of H2O2-induced damage in retinal pigment epithelial cells,and to investigate the protective effects of blueberry anthocyanin.Methods Cell viability was determined by MTT assay and the reactive oxygen species (ROS) level was measured using fluorescence assay.We selected H2O2 solution of different concentrations from 0 to 3 200 μmol · L-1 to stimulate ARPE-19 cells for 2,6 and 24 h,and compared the effects of blueberry anthocyanins of 1,5 and 10 mg · L-1 on cells pretreated with 6 h and 24 h.The model of oxidative damage was then established and applied in the next study,which focused on the protective effects of major constituents in blueberry anthocyanins,malvidin and its glycosides.Results Model condition of H2O2-induced damage in ARPE-19 cells was 800 μmol · L-1 H2O2 for 2 h.The cell viability decreased to 63.69％ when stimulated by H2O2.With pretreatment of 5 mg · L-1 blueberry anthocyanin extract (BAE),pure anthocyanin malvidin (My) and its glucoside (Mv-3-glc) and galactoside (Mv-3-gal),ARPE-19 cell viabilities were significantly improved to 86.57％,115.72％,98.15％ and 127.97％,respectively (P ＜ 0.01).Meanwhile,the ROS levels were attenuated by 52.38％,95.38％,77.55％ and 116.09％,respectively (P ＜ 0.05).Conclusion Blueberry anthocyanin could significantly inhibit the oxidative damage induced by H2O2 in retinal pigment epithelial cells,and malvidin and its glycosides contribute to the protective effects.

FEN1 expression in oral carcinoma-associated fibroblasts and its relationship with PCNA / 口腔疾病防治

Objective@#To research the expression levels of FEN1 and PCNA in carcinoma-associated fibroblasts (CAFs) and analyze their correlation. @*Methods@#Fresh specimens of oral squamous cell carcinoma tissues and normal oral mucosal tissues excised during oral and maxillofacial plastic surgery were collected. Primary oral CAFs and normal fibroblasts (NFs) were obtained by tissue culture, identified by immunocytochemistry and divided into the CAF and NF groups. Western blot and quantitative real-time PCR were used to detect the protein and mRNA expression levels of both FEN1 and PCNA in the oral CAFs and NFs. The correlation between FEN1 and PCNA expression in oral CAFs was analyzed. @*Results@#Oral CAFs and oral NFs were successfully cultured and identified from 12 samples. Both the protein and mRNA expression levels of FEN1 and PCNA were higher in the oral CAFs than NFs, but there were no significant differences (P > 0.05). In the oral CAFs, the linear correlation coefficient between FEN1 and PCNA was 0.677 (P = 0.016) at the mRNA level, indicating a strong positive correlation; however, at the protein level, no correlation was found (P > 0.05). @*Conclusion@# In primary cultured oral CAFs and NFs, there were no significant differences in the FEN1 and PCNA protein and mRNA expression levels. However, in the CAFs, the mRNA levels of FEN1 and PCNA had a strong positive correlation. The relationship and the regulatory mechanism of the two genes require further study.

MIPPO and ORIF for the treatment of elderly proximal humerus fractures of type Neer II:a case control study / 中国骨伤

<p><b>OBJECTIVE</b>To compare the clinical efficacy of minimally invasive percutaneous plate osteosynthesis(MIPPO)and open reduction and internal fixation (ORIF) in treating senile NEER IIproximal humerus fractures.</p><p><b>METHODS</b>From March 2014 to March 2016, 46 elderly patients with Neer II proximal humerus fractures were retrospectively reviewed. Among them, 20 patients in MIPPO group included 9 males and 11 females with an average age of (70.4±4.4) years old; while 26 patients in ORIF group included 11 males and 15 females with an average age of (70.9±4.0) years old. The length of hospital stay, times of fluoroscopy, beginning time of function rehabilitation, healing time of fracture, Constant Murley score of the shoulder joint at 3, 6, 12 months after operation and complications were observed and compared.</p><p><b>RESULTS</b>All patients were followed up for 12 to 24 months with an average of 16.8±3.7. The healing time of fracture, beginning time of function rehabilitation in MIPPO group were(13.0±0.8) weeks, (3.0±0.9) days respectively and shorter than those in ORIF group which were (13.8±1.4) weeks and(6.8±1.3) days. The times of fluoroscopy in MIPPO group was 19.2±3.7 and more than that in ORIF group which was 12.1±3.4. At 3 and 6 months after operation, Constant Murley score in MIPPO group were 81.3±3.9, 86.6±5.4 and more than that in ORIF group which were 69.5±6.6, 80.5±6.7. There were no differences between two groups in the length of hospital stay, Constant Murley score at 12 months after operation and grading at the final follow-up. There was one fracture redisplacement in each group. And 1 case of axillary nerve injury in MIPPO group, 2 cases of delayed union in ORIF group. No incision infection, screw loosening or plate break was found.</p><p><b>CONCLUSIONS</b>MIPPO and ORIF are both effective in treating Neer II proximal humeral fractures. MIPPO technique has the advantages of faster recovery, earlier rehabilitative exercise and better shoulder function. The disadvantages are more exposure to radiationd and the possibility of axillary nerve injure.</p>

The Role of Histone Deacetylase Inhibitors in Regulation of Akt/GSK-3ß Signaling Pathway in Mice Following Transient Focal Cerebral Ischemia

Abstract Purpose: To investigate whether the neuroprotective effect of TSA on cerebral ischemia reperfusion injury is mediated by the activation of Akt/GSK-3β signaling pathway. Methods: Mice were randomly divided into four groups (n=15): sham group (S); ischemia reperfusion group (IR); ischemia reperfusion and pretreated with TSA group (IR+T); ischemia reperfusion and pretreated with TSA and LY294002 group (IR+T+L). The model of cerebral ischemia reperfusion was established by 1h of MCAO following 24h of reperfusion. TSA (5mg/kg) was intraperitoneally given for 3 days before MCAO, Akt inhibitor, LY294002 (15 nmol/kg) was injected by tail vein 30 min before the MCAO. Results: TSA significantly increased the expression of p-Akt, p-GSK-3β proteins and the levels of SOD, Bcl-2, reduced the infarct volume and the levels of MDA, ROS, TNF-α, IL-1β, Bax, Caspase-3, TUNEL and attenuated neurological deficit in mice with transient MCAO, LY294002 weakened such effect of TSA dramatically. Conclusions: TSA could significantly decrease the neurological deficit and reduce the cerebral infarct volume, oxidative stress, inflammation, as well as apoptosis during cerebral ischemia reperfusion injury, which was achieved by activation of the Akt/GSK-3β signaling pathway.

Effects and Mechanisms of Radiofrequency Ablation of Renal Sympathetic Nerve on Anti-Hypertension in Canine / Efeitos e Mecanismos da Denervação Simpática Renal por Radiofrequência na Anti-Hipertensão em Cães

Abstract Background: Radiofrequency ablation of renal sympathetic nerve (RDN) shows effective BP reduction in hypertensive patients while the specific mechanisms remain unclear. Objective: We hypothesized that abnormal levels of norepinephrine (NE) and changes in NE-related enzymes and angiotensinconverting enzyme 2 (ACE2), angiotensin (Ang)-(1-7) and Mas receptor mediate the anti-hypertensive effects of RDN. Methods: Mean values of systolic blood pressure (SBP), diastolic blood pressure (DBP) and mean arterial pressure (MAP) were assessed at baseline and follow-up. Plasma and renal norepinephrine (NE) concentrations were determined using highperformance liquid chromatography with electrochemical detection, and levels of NE-related enzyme and ACE2-Ang(1-7)- Mas were measured using real time PCR, Western blot and immunohistochemistry or Elisa in a hypertensive canine model fed with high-fat diet and treated with RDN. The parameters were also determined in a sham group treated with renal arteriography and a control group fed with normal diet. Results: RDN decreased SBP, DBP, MAP, plasma and renal NE. Compared with the sham group, renal tyrosine hydroxylase (TH) expression was lower and renalase expression was higher in the RDN group. Compared with the control group, renal TH and catechol-o-methyl transferase (COMT) were higher and renalase was lower in the sham group. Moreover, renal ACE2, Ang-(1-7) and Mas levels of the RDN group were higher than those of the sham group, which were lower than those of the control group. Conclusion: RDN shows anti-hypertensive effect with reduced NE and activation of ACE2-Ang(1-7)-Mas, indicating that it may contribute to the anti-hypertensive effect of RDN.

Resumo Fundamentos: A denervação simpática renal por radiofrequência (DSR) mostra redução eficaz da pressão arterial (PA) de pacientes hipertensos, ainda que os mecanismos específicos permaneçam obscuros. Objetivo: Fizemos a hipótese de que níveis alterados de noradrenalina (NA) e mudanças nas enzimas relacionadas à NA e enzima conversora de angiotensina 2 (ECA-2), angiotensina (Ang)-(1-7) e receptor Mas são mediadores dos efeitos antihipertensivos da DSR. Métodos: Foram avaliados os valores médios de pressão arterial sistólica (PAS), pressão arterial diastólica (PAD) e pressão arterial média (PAM) no início e durante o seguimento. Foram medidas as concentrações plasmática e renal de noradrenalina (NA) por cromatografia líquida de alta eficiência com detecção eletroquímica, e os níveis de enzima relacionada à NA e ECA2-Ang-(1-7)-Mas através de PCR em tempo real, Western blot e imunohistoquímica ou Elisa em um modelo canino de hipertensão que recebeu ração rica em gordura e foi tratado com DSR. Os parâmetros também foram determinados em um grupo de cirurgia simulada submetido à arteriografia renal e em um grupo controle que recebeu dieta normal. Resultados: DSR causou diminuição da PAS, PAD, PAM e das concentrações plasmática e renal de NA. Em comparação ao grupo placebo, a expressão da tirosina hidroxilase (TH) renal foi menor e a da renalase foi maior no grupo DSR. Em comparação ao grupo controle, os níveis de TH renal e de catecol-o-metil-transferase (COMT) foram maiores e os de renalase foram menores no grupo cirurgia simulada. Além disso, os níveis renais de ECA2, Ang-(1-7) e Mas foram maiores no grupo DSR do que no grupo cirurgia simulada, que, por sua vez, foram menores do que no grupo controle. Conclusões: A DSR mostra efeitos anti-hipertensivos com redução da NA e ativação da ECA2-Ang-(1-7)-Mas, o que indica que pode contribuir com o efeito anti-hipertensivo da DSR.

Study of active ingredients of Chinese medicine interfering with molecular signaling pathway of liver fibrosis / 中国药理学通报

The occurrence and progression of hepatic fibrosis are regulated by multicytokines and multiple molecular signal trans-duction pathways in cells. Currently,the molecular signaling pathway is the target for drugs to treat diseases. The study of the active ingredients of Chinese medicine to interfere with the sig-naling pathways of liver fibrosis is a hot topic. In the past ten years,it has been reported that hydroxysafflor yellow A,total flavonoids from litchi seed,ursolic acid,curcumin can interfere the signaling pathway of p38MAPK,TGF-β/ Smad,Wnt,Ras/ERK and Hedgehog liver fibrosis. The research on the active in-gredients of Chinese traditional medicine,which is targeted at signaling pathways,is expected to open new areas for Chinese and western medicine in the treatment of liver fibrosis.

Application of three-dimensional printed skull in the teaching of human anatomy / 基础医学与临床

Objective This experiment aimed to find out the feasibility of applying 3D printing technology to anato-my education. Methods We constructed 3D printed skull using a cadaveric skull as template.26 participants were recruited from Peking Union Medical College. All participants studied cranial anatomy with 3D printed skulls as teaching materials,and then assessed practicability of 3D printed skulls by subjective assessment questionnaires. Results 57% participants considered that 3D printed skulls can present defined cranial anatomical structures.More than 90% participants agreed that 3D printed models helped spatial comprehension and study of anatomy.88% par-ticipants suggested 3D printing can solve the problem of ethics.84% participants agreed to apply 3D printed models into cranial anatomy education. Conclusions The efficacy of 3D printing had been confirmed in anatomical educa-tion. Further application of 3D printing technology in medical education needs carrying out.

Establishment and evaluation of a guinea pig model of itching / 中国实验动物学报

Objective To optimize the optimal doses of histamine and 4-aminopyridine (4-AP) in the establish-ment of guinea pigs models of itching, and to establish a new guinea pig model of itching. Methods The central composite design-response surface method was used to arrange the experiment. In the experiment different pruritus agents were hypo-dermically injection of 0. 5 mL in the depilated area, and the scratching incubation period and scratching number in 30 mi-nutes were counted after the injection. The guinea pig itching model was evaluated by observing the behavioral changes of guinea pigs and measuring the levels of histamine and interleukin-6 in the blood. Results The behavioral experiments found that the scratching frequency in the the combination group was significantly higher than the histamine group and 4-AP group (P<0. 01). The itching latency of the combination group was significantly shorter than that of the histamine group and 4-AP group (P<0. 01). Compared with the control group, the histamine concentrations of the combination group and histamine group were significantly increased ( P<0. 05 or P<0. 01 ) , and the level of the combination group was lower than that of the histamine group (P<0. 05). Compared with the control group, the serum IL-6 concentrations of histamine group, 4-AP group and combination group were significantly higher (P<0. 01 or P<0. 05), and those in the combination group were significantly higher than the histamine and 4-AP groups. Compared with the control group, pathologic examina-tion showed proliferation of inflammatory cells in all model groups, and the reaction of the combination group was more ob-vious. Conclusions The optimal conditions used in this experiment are easy to achieve and have good reproducibility in the establishment of a guinea pig model of itching.

Application of three-dimensional printed skull in the teaching of human anatomy / 基础医学与临床

Objective This experiment aimed to find out the feasibility of applying 3D printing technology to anato-my education. Methods We constructed 3D printed skull using a cadaveric skull as template.26 participants were recruited from Peking Union Medical College. All participants studied cranial anatomy with 3D printed skulls as teaching materials,and then assessed practicability of 3D printed skulls by subjective assessment questionnaires. Results 57% participants considered that 3D printed skulls can present defined cranial anatomical structures.More than 90% participants agreed that 3D printed models helped spatial comprehension and study of anatomy.88% par-ticipants suggested 3D printing can solve the problem of ethics.84% participants agreed to apply 3D printed models into cranial anatomy education. Conclusions The efficacy of 3D printing had been confirmed in anatomical educa-tion. Further application of 3D printing technology in medical education needs carrying out.

Analysis of metabolites of quercitrin in rat intestinal flora by using UPLC-ESI-Q-TOF-MS/MS / 中国中药杂志

To investigate the metabolism of quercitrin in rat intestinal flora and possible biological pathways, laying the foundation for the metabolic mechanism of traditional Chinese medicine glycosides ingredients. UPLC-Q-TOF-MS/MS method was established to detect the quercitrin and its metabolites with 0.1% formic acid solution(A)-0.1% formic acid acetonitrile(B) as the mobile phase for gradient elution at a flow rate of 0.3 mL•min⁻¹. Electrospray negative ion mode was applied to analyze the metabolites of quercitrin in rat intestinal flora. Metabolite ToolsTM, mass defect filter(MDF) and other technologies were used to screen, analyze the metabolites and infer the chemical formula of the metabolites. The results showed that quercitrin would have degalactoside, deoxygenation and acetylation reactions, and the aglycone quercetin resulted from degalactoside would have further reactions such as hydroxylation, deoxygenation, reduction, and ring opening to achieve deoxygenation metabolite kaempferol, C2-C3 double bonds hydrogenation and reduction product taxifolin, and degalactoside product quercetin. The research results showed that quercitrin can be metabolized by rat intestinal flora, which could increase their hydrophobicity and chemical diversity.