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1.
Acta Pharmaceutica Sinica B ; (6): 1498-1521, 2023.
Article in English | WPRIM | ID: wpr-982800

ABSTRACT

Gas therapy has been proven to be a promising and advantageous treatment option for cancers. Studies have shown that nitric oxide (NO) is one of the smallest structurally significant gas molecules with great potential to suppress cancer. However, there is controversy and concern about its use as it exhibits the opposite physiological effects based on its levels in the tumor. Therefore, the anti-cancer mechanism of NO is the key to cancer treatment, and rationally designed NO delivery systems are crucial to the success of NO biomedical applications. This review summarizes the endogenous production of NO, its physiological mechanisms of action, the application of NO in cancer treatment, and nano-delivery systems for delivering NO donors. Moreover, it briefly reviews challenges in delivering NO from different nanoparticles and the issues associated with its combination treatment strategies. The advantages and challenges of various NO delivery platforms are recapitulated for possible transformation into clinical applications.

2.
International Journal of Oral Science ; (4): 23-23, 2023.
Article in English | WPRIM | ID: wpr-982480

ABSTRACT

Resection of oral and maxillofacial tumors is often accompanied by the inferior alveolar nerve neurectomy, resulting in abnormal sensation in lower lip. It is generally believed that spontaneous sensory recovery in this nerve injury is difficult. However, during our follow-up, patients with inferior alveolar nerve sacrifice showed different degrees of lower lip sensory recovery. In this study, a prospective cohort study was conducted to demonstrate this phenomenon and analyze the factors influencing sensory recovery. A mental nerve transection model of Thy1-YFP mice and tissue clearing technique were used to explore possible mechanisms in this process. Gene silencing and overexpression experiments were then conducted to detect the changes in cell morphology and molecular markers. In our follow-up, 75% of patients with unilateral inferior alveolar nerve neurectomy had complete sensory recovery of the lower lip 12 months postoperatively. Patients with younger age, malignant tumors, and preservation of ipsilateral buccal and lingual nerves had a shorter recovery time. The buccal nerve collateral sprouting compensation was observed in the lower lip tissue of Thy1-YFP mice. ApoD was demonstrated to be involved in axon growth and peripheral nerve sensory recovery in the animal model. TGF-β inhibited the expression of STAT3 and the transcription of ApoD in Schwann cells through Zfp423. Overall, after sacrificing the inferior alveolar nerve, the collateral compensation of the ipsilateral buccal nerve could innervate the sensation. And this process was regulated by TGF-β-Zfp423-ApoD pathway.


Subject(s)
Mice , Animals , Lip/innervation , Prospective Studies , Mandibular Nerve/pathology , Sensation/physiology , Trigeminal Nerve Injuries/pathology
3.
Chinese Pharmacological Bulletin ; (12): 712-718, 2022.
Article in Chinese | WPRIM | ID: wpr-1014098

ABSTRACT

Aim To explore the arrhythmic risk of Chan Su intravenous injection(CS)and its underlying mechanismin in the absent or presence of IL-6.Methods The recording techniques of guinea pig in vivo ECG, the action potential, L-type Ca2+ and Na+ currents from left ventricular myocytes were used to analyze heart rate(HR), P-R, QRS and QTc intervals and the underlying mechanism.Results① CS at one time CRD(clinically relevant dose)insignificantly changed the guinea pig in vivo ECG.However, the IL-6(18.4 μg·kg-1)only and the combinational use of IL-6(18.4 μg·kg-1)plus CS(one time CRD)remarkably prolonged the P-R and QTc intervals.② The CS at one time CRC(clinically relevant concentration)had no significant change in the action potential duration at 90% repolarization level(APD90).The IL-6(20 μg·L-1)only and the combination of CS at one time CRC plus IL-6(20 μg·L-1)significantly prolonged APD90.③ Moreover, the IL-6(20 μg·L-1)combined with CS at one time CRC significantly inhibited the L-type Ca2+ current. CS at one, five, ten time CRC, IL-6(20 μg·L-1)alone and IL-6(20 μg·L-1)combined with CS had no significant effects on Na+current.Conclusions CS intravenous injection has low risk of arrhythmia in the clinical settings.However, in presence of high titer of IL-6 characterized by inflammation, CS may induce the atrioventricular conduction block due to the blockade effect on Ca2+ current by both of CS and IL-6.

4.
Chinese Journal of Digestive Surgery ; (12): 89-92, 2022.
Article in Chinese | WPRIM | ID: wpr-930916

ABSTRACT

The medical data processed and analyzed in clinical research often contain a large number of personal information. Therefore, researchers should pay attention to the safety management of medical data during clinical research. The Data Security Law of People's Republic of China and the Personal Information Protection Law of People's Republic of China implemented on 1 st September and 1 st November 2021 respectively establish legal basis for data security and personal information protection and point out the direction for medical data security, which indicate that data governance has entered the 'strong regulatory era'. In the process of medical data collection and application of clinical research, respecting and protecting the privacy and safety of patients, ensuring the quality of medical data, safely managing medical data and carrying out high-quality clinical research will be an important test for the collection and application of clinical scientific research data under the new legal background.

5.
Acta Pharmaceutica Sinica B ; (6): 2592-2608, 2022.
Article in English | WPRIM | ID: wpr-929393

ABSTRACT

Self-assembling carrier-free nanodrugs are attractive agents because they accumulate at tumor by an enhanced permeability and retention (EPR) effect without introduction of inactive substances, and some nanodrugs can alter the immune environment. We synthesized a peptidyl arginine deiminase 4 (PAD4) molecular inhibitor, ZD-E-1M. It could self-assembled into nanodrug ZD-E-1. Using confocal laser scanning microscopy, we observed its cellular colocalization, PAD4 activity and neutrophil extracellular traps (NETs) formation. The populations of immune cells and expression of immune-related proteins were determined by single-cell mass cytometry. ZD-E-1 formed nanoflowers in an acidic environment, whereas it formed nanospheres at pH 7.4. Accumulation of ZD-E-1 at tumor was pH-responsive because of its pH-dependent differences in the size and shape. It could enter the nucleus and bind to PAD4 to prolong the intracellular retention time. In mice, ZD-E-1 inhibited tumor growth and metastasis by inhibiting PAD4 activity and NETs formation. Besides, ZD-E-1 could regulate the ratio of immune cells in LLC tumor-bearing mice. Immunosuppressive proteins like LAG3 were suppressed, while IFN-γ and TNF-α as stimulators of tumor immune response were upregulated. Overall, ZD-E-1 is a self-assembling carrier-free nanodrug that responds to pH, inhibits PAD4 activity, blocks neutrophil extracellular traps formation, and improves the tumor immune microenvironment.

6.
Chinese Pharmacological Bulletin ; (12): 1264-1270, 2021.
Article in Chinese | WPRIM | ID: wpr-1014369

ABSTRACT

Aim To investigate the inotropic effect of PF-04957325, a phosphodiesterase type 8 inhibitor, in normal rats and its underlying molecular mechanism. Methods The techniques of in vivo rat left ventricular pressure-volume loop (P-V loop) and isolated perfusion rat heart were used to analyze the hemodynamics and positive inotropic effect of rat hearts. The Ca transient induced by field stimulation was used to analyze the hemodynamics of sarcoplasmic reticulum (SR) Ca + uptaking. Western blot was used to analyze the phosphorylation levels of SR phospolamban (PLB) and ryanodine receptor type 2 (RyR2). Results The P-V loop experiment indicated that PF-04957325 (0.5 mg · kg

7.
Clinics ; 75: e1436, 2020. tab
Article in English | LILACS | ID: biblio-1133422

ABSTRACT

OBJECTIVES: The prevalence of diabetes mellitus has recently increased in Taiwan, and depression is common among these patients. Moreover, a lack of health literacy may lead to depression. In this study, we explored the correlation between health literacy and depression in diabetic women. METHODS: In this cross-sectional study, 152 women with type 2 diabetes mellitus were recruited from the outpatient clinic of a regional teaching hospital in Taiwan. The data were collected through medical records and a self-reported structured questionnaire, which included items on basic attributes, self-rated health status, the Center for Epidemiologic Studies Depression Scale (CES-D), and Chinese Health Literacy Scale for Diabetes (CHLSD). The results were analyzed using descriptive statistical analyses, bivariate correlation tests, and linear regression analyses. RESULTS: One hundred thirty-five valid questionnaires were obtained. Approximately 20% of the participants had a higher tendency toward depression as per their CES-D score, and the CHLSD results showed that 13.33% had poor health literacy. There was a negative correlation between health literacy and depressive tendencies after adjusting for self-rated health status, economic satisfaction status, employment status, and education level using multivariate linear regression analyses. For each 1-point rise in the CHLSD score, the CES-D score decreased by 0.17 points (z=−2.05, p=0.042). CONCLUSIONS: A negative correlation was identified between health literacy and depression. Self-rated health status, economic satisfaction, employment status, and higher education level are factors that also affect depressive tendency among diabetic women.


Subject(s)
Humans , Female , Diabetes Mellitus, Type 2 , Health Literacy , Taiwan , Cross-Sectional Studies , Surveys and Questionnaires , Depression
8.
Clinical Medicine of China ; (12): 573-576, 2018.
Article in Chinese | WPRIM | ID: wpr-706734

ABSTRACT

Objective The pathogenesis of urinary tract infection and the preventive effect of Bacillus Calmette Guerin on bladder cancer imply the importance of bladder as a unique mucosal surface research. This article discussed that after bladder infected by bacteria,the way in which the microenvironment produce adaptive immunity. Once in the past, bladder is widely considered to be a sterile environment, the concept has been recently shaken. It is suggested that we should further study the influence of urinary tract pathogen infection or BCG immune response. In this paper, bladder biology has been illustrated, and bladder organ immunity is urgently needed to be explored and defined.

9.
Chinese Circulation Journal ; (12): 390-394, 2018.
Article in Chinese | WPRIM | ID: wpr-703871

ABSTRACT

Objectives: To evaluate the changes of left atrial volume (LAV) and the maximum ostial cross-sectional area (CAS) of pulmonary vein (PV) in atrial fibrillation (AF) patients after circumferential pulmonary vein isolation radiofrequency catheter ablation (CPVA-RFCA) and to explore their relationship to AF recurrence by enhanced cardiac MRI evaluation. Methods: Our research included in 2 groups: Control group, n=20 healthy subjects and AF group, n=78 patients whom were classified into 2 subgroups as Paroxysmal AF subgroup, n=46 and Persistent AF subgroup, n=32; 66 patients received CPVA-RFCA and based on 6 months post-operative recurrence, they were divided into another set of 2 groups: AF recurrent subgroup, n=17 and Non-AF recurrent subgroup, n=49. Pre- and 6 months post-operative maximum ostial CSA of PV were measured by enhanced cardiac MRI, LAV were obtained by 3D reconstruction and the differences were compared between AF group and Control group, Paroxysmal AF subgroup and Persistent AF subgroup, AF recurrent subgroup and Non-AF recurrent subgroup; their relationships to AF recurrence were studied.Results: Compared with Control group, AF group had increased LAV and elevated ostial CSA of superior PV (SPV), both P<0.05. Compared with Paroxysmal AF subgroup, Persistent AF subgroup had increased LAV and elevated ostial CSA of SPV, both P<0.05. Compared with pre-operative condition, at 6 months after the operation, Non-AF recurrent subgroup showed reduced ostial CSAs in left SPV (LSPV), right SPV (RSPV), right inferior PV (RIPV) and decreased LAV, all P<0.05;while AF recurrent subgroup showed expanded RSPV and increased LAV,allP<0.05.Post-operative reductions of LAV and ostial CSA of SPV had close correlation; multivariate Logistic regression analysis indicated that LAV (HR=1.05, P<0.01)and ostial CSA of RSPV(HR=1.09,P=0.05)were related to AF recurrence after RFCA. Conclusions: CAPV-RFCA could reverse left atrial and PV remodeling in AF patients, LAV and ostial CSA of RSPV were related to post-operative AF recurrence.

10.
Acta Pharmaceutica Sinica ; (12): 2099-2103, 2018.
Article in Chinese | WPRIM | ID: wpr-780093

ABSTRACT

A non-reduced SDS-PAGE purity method for quantitation of conbercept fragments was established based on gel screening, comparison of gel imaging system, linearity range of main band, screening of destaining conditions. The results indicated that the bands could be separated effectively with good clearness and flatness on 4%-15% gradient concentration gel, the peaks of all bands could be separated from baseline using high-distinguishability gel imaging system, the signal intensity of a main band had shown a good linearity with ≤ 3 μg of loading amount, and that the destaining was set as a total of ≤ 3 h with exchanging 100 mL destaining buffer every 60 min. The established non-reduced SDS-PAGE method could demonstrate the purity of conbercept more objectively. After validation, the established non-reduced SDS-PAGE method was submitted to FDA in the form of supplementary materials, which laid a quality basis for the direct entry of conbercept to the clinical Ⅲ study in the United States.

11.
The Journal of Practical Medicine ; (24): 3405-3409, 2017.
Article in Chinese | WPRIM | ID: wpr-659380

ABSTRACT

Objective To observe the effect and adverse effect of ultrashort wave combined with Etroricox-ib in treatment of periarthritis of shoulder. Methods 80 cases with periarthritis of shoulder from March 2015 to March 2016 were randomly assigned into treatment group and control group. Etroricoxib therapy was provided in control group while ultrashort wave plus Etroricoxib therapy in treatment group. VAS ,ROM and MBI were applied for the evaluation before and after the treatment. The differences of clinical cure rate ,recurrence rate and adverse reactions were observed between 2 groups. Results There were higher cure rates ,lower recurrence rates and less adverse reactions in 2 groups after the treatment. The shoulder joint pain ,rang of should motion and BI of both groups were improved with significant differences after the treatment ,but treatment group witnessed more improve-ment(P<0.05). Conclusions Ultrashort wave combined with Etroricoxib therapy can relieve shoulder pain ,and further improve the function of shoulder joint activity in the treatment of periarthritis of shoulder. It is recommended for clinical application.

12.
The Journal of Practical Medicine ; (24): 3405-3409, 2017.
Article in Chinese | WPRIM | ID: wpr-657379

ABSTRACT

Objective To observe the effect and adverse effect of ultrashort wave combined with Etroricox-ib in treatment of periarthritis of shoulder. Methods 80 cases with periarthritis of shoulder from March 2015 to March 2016 were randomly assigned into treatment group and control group. Etroricoxib therapy was provided in control group while ultrashort wave plus Etroricoxib therapy in treatment group. VAS ,ROM and MBI were applied for the evaluation before and after the treatment. The differences of clinical cure rate ,recurrence rate and adverse reactions were observed between 2 groups. Results There were higher cure rates ,lower recurrence rates and less adverse reactions in 2 groups after the treatment. The shoulder joint pain ,rang of should motion and BI of both groups were improved with significant differences after the treatment ,but treatment group witnessed more improve-ment(P<0.05). Conclusions Ultrashort wave combined with Etroricoxib therapy can relieve shoulder pain ,and further improve the function of shoulder joint activity in the treatment of periarthritis of shoulder. It is recommended for clinical application.

13.
Chinese Journal of Microbiology and Immunology ; (12): 676-680, 2016.
Article in Chinese | WPRIM | ID: wpr-504272

ABSTRACT

Objective To investigate the virus-carrying rate of non-polio enteroviruses ( NPEV) in patients with acute flaccid paralysis ( AFP) in Yunnan province of China in 2015 and to analyze the genetic characteristics of enterovirus 71 (EV71) strains. Methods A total of 213 cases under 15 years old with AFP were reported by Center for Disease Control and Prevention ( CDC) of Yunnan Province of China. Virus isolation was conducted for all samples and the serotypes of isolated NPEV strains were identified by VP1 se-quencing. The isolation rates of NPEV in the past consecutive 5 years were analyzed by SPSS22. 0 software. Phylogenetic trees of NPEV and EV71 strains were constructed by MEGA6. 06 software based on neighbor-joining algorithm and Kimura 2-parameter substitution model and the reliability of the phylogenetic trees was determined by bootstrap analysis with 100 pseudo replicate datasets. Results Altogether, 23 NPEV strains were isolated from 213 AFP cases. Among the 23 strains, 7 strains belonged to EV-A group (2 serotypes, 6 strains of which were EV71 ) , 14 strains belonged to EV-B group ( 8 serotypes ) and the other 2 strains belonged to EV-C group. No NPEV strains of EV-D group were identified. Statistical analysis showed that no significant differences in the isolation rates were observed in the past 5 years ( P=0. 101 ) . Conclusion The isolation rate of NPEV in patients with AFP in Yunnan province in 2015 was similar to that of the previ-ous years. The EV71 strains of C4 subgenotype were the predominant strains circulating in Yunnan province.

14.
Chinese Pharmaceutical Journal ; (24): 1349-1352, 2016.
Article in Chinese | WPRIM | ID: wpr-859030

ABSTRACT

Polyketide synthases (PKSs) and nonribosomal peptide synthetases (NRPSs) are two kinds of multi-modular enzymes, which biosynthesize highly complex polyketides and nonribosonmal peptides, respectively. Both of these two secondary metabolites are of considerable pharmaceutical relevance and are thought to cover diverse biological functions. With the development of sequencing and bioinformatics, data about PKS/NRPS are increasing rapidly. New PKS/NRPS databases are created to analyze gene sequence and predict the functions and structures of natural products. In this article, we introduce five newest databases including PKMiner, NRPSsp, NaPDoS, ClusterMine360, and IMG-ABC, with the goal to help researchers choose databases.

15.
Chinese Journal of cardiovascular Rehabilitation Medicine ; (6): 75-78, 2016.
Article in Chinese | WPRIM | ID: wpr-492050

ABSTRACT

Objective:To explore therapeutic effect and safety of cilostazol combined clopidogrel +aspirin on aged pa‐tients after percutaneous coronary intervention (PCI) .Methods :A total of 100 aged patients with coronary heart disease undergoing PCI were randomly divided into routine treatment group (n=52 ,received aspirin and clopidogrel antiplatelet therapy) and cilostazol group (n= 48 ,received cilostazol therapy based on routine treatment group ) . Turbidimetry was used to measure platelet aggregation rate (PAR );PAR and mean platelet volume (MPV ) were compared between two groups before ,one week and one month after PCI .All subjects were followed up for six months ,incidence rates of major adverse cardiovascular events (MACE) and hemorrhage events were compared be‐tween two groups .Results:There were no significant difference in MPV and PAR between two groups before PCI . Compared with routine treatment group ,PAR significantly reduced [one week after PCI :(48.7 ± 6.3)% vs .(43.5 ± 5.7)% ,one month after PCI :(46.8 ± 5.8)% vs .(42.4 ± 5.4)% ] in cilostazol group , P0.05;incidence rate of hemorrhage in cilostazol group was significantly lower than that of routine treatment group (6.25% vs .19.23% , P< 0.01) .Conclusion:Compared with clopidogrel+aspirin therapy ,cilostazol combined clopidogrel+aspirin can more significantly inhibit platelet ag‐gregation ,and significantly reduce hemorrhage events ,so they are safe and effective in aged patients with coronary heart disease undergoing PCI .

16.
Chinese Journal of Experimental Ophthalmology ; (12): 819-822, 2013.
Article in Chinese | WPRIM | ID: wpr-636262

ABSTRACT

Background The multipotent differentiation features of induced pluripotent stem cells (iPSCs) offer a new option for cell replacement therapy of many clinical diseases.In ophthalmology,iPSCs are a good model in studying the pathogenic mechanism of degenerative ocular diseases.A better identification method for iPSCs is critical for analyzing the in vivo biological characteristics of iPSCs.Objective This study was to investigate the feasibility and stability of labeling iPSCs with quantum dots.Methods Human umbilical mesenchymal stromal cells-iPSC lines were cultured and amplified on matrigel,and the characteristics of iPSCs were evaluated by immunofluorescence.Different concentrations (5.0,7.5 and 10.0 nmol/L) of quantum dots with a CdSe/ZnS nuclear shell structure were used to label iPSCs after passaging and proliferation.The labeling outcome was observed with a three-dimensional deconvolution real-time live cells imaging system.The labeled iPSCs were subsequently cultivated,and then changes in fluorescence intensity were examined 7 days after the first and the second passaging of iPSCs.Results iPSCs were observed to grow in a clonal manner under the inverted microscope.The iPSC markers,OCT4 and Nanog,were detected by immunofluorescence.With increasing concentrations of quantum dots,the fluorescence intensities representing the levels of OCT4 and Nanog in iPSCs were gradually elevated,with optimal levels of fluorescence observed at a concentration of 10 nmol/L of quantum dots.The fluorescent labeling of OCT4 and Nanog in iPSCs remained and weakened gradually till day 7 even after the second passage.Conclusions Quantum dots labeling could be used to track iPSCs in a dose-independent manner.The fluorescent signal from the quantum dots labeling the iPSCs lasts 2 weeks at least.

17.
Chinese Journal of Experimental Ophthalmology ; (12): 127-131, 2013.
Article in Chinese | WPRIM | ID: wpr-636027

ABSTRACT

Background The construction of tissue-engineered corneal endothelium needs the functional seeding cells,so how to culture a large amount of functional corneal endothelial cells (CECs) is an urgent problem to be solved.Objective The aim of this study was to evaluate the role of aqueous humor on bovine CECs in vitro.Methods Aqueous humor of 1.2 ml was collected from the anterior chamber of bovine and sterilized,and the liquid supernatant was obtained.The bovine CECs were isolated from bovine cornea and then cultured in low glucose Dulbecco Modified Eagle Medium with 10% fetal bovine serum (FBS) in vitro.Aqueous humor was added into the medium with the final concentration of 2.5%,5.0%,l0.0%,15.0% and 20.0%,respectively,and no aqueous humor was added in the control group.Cell counting kit-8 (CCK-8) assay was used to detect the absorbency value of CECs for the evaluation of cell proliferation.Progression of the cell cycle was analyzed by flow cytometry (FCM).After confluence of the cells was reached,1 ml plastic spear tip was used to scratch the cell single layer,and the cells were incubated consequently in medium with 10% FBS and with or without aqueous humor for 24 hours.Healing area of the cell single layer was measured.The cells were incubated at a density of 6 × 105 cells/ml and cultured using medium with or without 10.0% aqueous human for 5 days,and the number of the cells was analyzed by DAPI fluorescence technique.Results Under the phase-contrast microscopy,the confluent CECs showed a slabstone-like and hexagonal appearance.CCK-8 assay revealed that the absorbance values of CECs was significantly different among the various culture groups (F=4.051,P =0.007),and the absorbance value in different concentrations of aqueous human culture groups was significantly higher than that in the control group (P < 0.01).FCM showed that the percentage of the cells in S-G2 phases was (34.80-±3.13)% in the 10.0% aqueous humors group and (23.06±1.13)% in the control group,showing a significant difference (t =-5.729,P=0.005).The scratch test showed that the healing area of the cell signal layer was (0.116±0.019) mm2 in the 10.0% aqueous humors group and (0.358 ±0.049) mm2 in the control group,showing a significant difference (t =13.842,P =0.000).The density of cells in the 10.0% aqueous humor group was (1439± 1 10)/field,which was more than (1162±45)/field in the control group (t =-11.020,P=0.000).Conclusions Aqueous humor at the concentration of 10.0% promote the growth and proliferation of bovine CECs.The result suggests that 10.0% aqueous humor can be used as a promoting agent during the culture of CECs.

18.
Chinese Journal of Applied Physiology ; (6): 423-427, 2013.
Article in Chinese | WPRIM | ID: wpr-235341

ABSTRACT

<p><b>OBJECTIVE</b>In order to explore effect of electromagnetic radiation on learning and memory ability of hippocampus neuron in rats, the changes in discharge patterns and overall electrical activity of hippocampus neuron after electromagnetic radiation were observed.</p><p><b>METHODS</b>Rat neurons discharge was recorded with glass electrode extracellular recording technology and a polygraph respectively. Radiation frequency of electromagnetic wave was 900 MHZ and the power was 10 W/m2. In glass electrode extracellular recording, the rats were separately irradiated for 10, 20, 30, 40, 50 and 60 min, every points repeated 10 times and updated interval of 1h, observing the changes in neuron discharge and spontaneous discharge patterns after electromagnetic radiation. In polygraph recording experiments, irradiation group rats for five days a week, 6 hours per day, repeatedly for 10 weeks, memory electrical changes in control group and irradiation group rats when they were feeding were repeatedly monitored by the implanted electrodes, observing the changes in peak electric digits and the largest amplitude in hippocampal CA1 area, and taking some electromagnetic radiation sampling sequence for correlation analysis.</p><p><b>RESULTS</b>(1) Electromagnetic radiation had an inhibitory role on discharge frequency of the hippocampus CA1 region neurons. After electromagnetic radiation, discharge frequency of the hippocampus CA1 region neurons was reduced, but the changes in scale was not obvious. (2) Electromagnetic radiation might change the spontaneous discharge patterns of hippocampus CA1 region neurons, which made the explosive discharge pattern increased obviously. (3) Peak potential total number within 5 min in irradiation group was significantly reduced, the largest amplitude was less than that of control group. (4) Using mathematical method to make the correlation analysis of the electromagnetic radiation sampling sequence, that of irradiation group was less than that of control group, indicating that there was a tending to be inhibitory connection between neurons in irradiation group after electromagnetic radiation.</p><p><b>CONCLUSION</b>Electromagnetic radiation may cause structure and function changes of transfer synaptic in global, make hippocampal CA1 area neurons change in the overall discharge characteristic and discharge patterns, thus lead to decrease in the ability of learning and memory.</p>


Subject(s)
Animals , Male , Rats , CA1 Region, Hippocampal , Cell Biology , Radiation Effects , Electromagnetic Radiation , Neurons , Physiology , Radiation Effects , Rats, Wistar
19.
National Journal of Andrology ; (12): 501-505, 2013.
Article in Chinese | WPRIM | ID: wpr-350872

ABSTRACT

<p><b>OBJECTIVE</b>To study the inhibitory effect of Akt inhibitor deguelin on PC-3 human prostate cancer cell lines and its possible mechanism.</p><p><b>METHODS</b>PC-3 human prostate cancer cells were cultured in deguelin at the concentrations of 10, 100, 500 and 1 000 nmol/L for 24, 48 and 72 hours, respectively. Then the inhibitory effect of deguelin on the proliferation of the PC-3 cells was determined by MTT assay and that on the cell cycle was detected by flow cytometry. The expression levels of MDM2 and GSK3beta mRNA were measured by RT-PCR and those of MDM2 and GSK3beta proteins by Western blot.</p><p><b>RESULTS</b>At 24, 48 and 72 hours, the inhibition rates of deguelin on the proliferation of the PC-3 prostate cancer cells were (91.10 +/- 3.75), (86.39 +/- 1.16) and (79.51 +/- 2.63)% at 10 nmol/L, (82.46 +/- 3.65), (76.84 +/- 0.97) and (69.69 +/- 2.30) % at 100 nmol/L, (81.46 +/- 0.41), (75.56 +/- 1.12) and (54.07 +/- 3.21)% at 500 nmol/L, and (66.77 +/- 2.82), (58.22 +/- 0.35) and (39.34 +/- 2.40)% at 1000 nmol/L, all with statistically significant differences from the control group (P < 0.01). Deguelin at 10, 100, 500 and 1 000 nmol/L increased the cell cycles blocked in the G0/G1 phase ([62.4 +/- 2.2], [63.6 +/- 1.1 ], [65.0 +/- 0.3] and [66.5 +/- 1.9]%, P < 0.01) and reduced the percentage of the S-phase cells ([14.7 +/- 2.4], [11.1 +/- 5.2], [5.8 +/- 1.1] and [7.0 +/- 0.6]%, P < 0.01). RT-PCR and Western blot showed markedly up-regulated expressions of GSK3 P3 a3beta down-regulated expressions of MDM2 mRNA and proteins in the PC-3 cells treated with deguelin.</p><p><b>CONCLUSION</b>Akt inhibitor deguelin can inhibit the proliferation of PC-3 human prostate cancer cells by affecting the down-stream signal molecules GSK3P3 and betaDM2 in the Akt pathway.</p>


Subject(s)
Humans , Male , Cell Line, Tumor , Cell Proliferation , Glycogen Synthase Kinase 3 , Metabolism , Glycogen Synthase Kinase 3 beta , Prostatic Neoplasms , Metabolism , Proto-Oncogene Proteins c-akt , Proto-Oncogene Proteins c-mdm2 , Metabolism , Rotenone , Pharmacology
20.
Chinese Medical Journal ; (24): 3840-3844, 2013.
Article in English | WPRIM | ID: wpr-236153

ABSTRACT

<p><b>BACKGROUND</b>This study was designed to analyze three tibial axis reference lines including the anterior tibial cortex (ATC) line, the fibular line (FL), and the anatomical axis of tibia (AAT) line, to determine which line most closely parallels the mechanical axis (MA) of the tibia in the sagittal plane. The clinical relevance of the study is that through finding a reliable landmark on the leg, a surgeon may minimize posterior tibial slope measurement errors thereby and improving the technique for assuring proper alignment of total knee arthroplasty.</p><p><b>METHODS</b>The material for this study included CT scans of the tibia from 85 consecutive patients and 168 knees (78 without osteoarthritis (OA) and 90 knees with OA). Measurements of the angles between the tibial mechanical axis and each of three reference lines in the sagittal plane were carried out using 3D imaging software.</p><p><b>RESULTS</b>Mean angles of 168 knees were as follows: aMT (3.96±0.85)°, aMF (0.70±0.58)°, and aMA (1.40±0.66)°, (aMT: an angle between MA and ATC, aMF: an angle between MA and FL, aMA: an angle between MA and AAT. All abovementioned angles were measured in the sagittal plane of tibia) and the aMF was significantly smaller than the others (P < 0.0001). The mean value of the medial tibial slope angle vs. the MA was (9.19±3.97)°, and this was significantly larger than the mean lateral slope angle of (6.62±4.23)° (P < 0.0001). The difference between aMF without OA and with OA was not statistically significant (P = 0.5015) and the association between the aMT and aMA was strong (r = 0.82, P < 0.01).</p><p><b>CONCLUSIONS</b>FL was more closely parallel to the MA of tibia, and more showed less variation between OA and non- OA controls than ATC and AAT lines. Furthermore, the amount of posterior slope in medial plateau was greater than that in lateral plateau. The findings of this analysis suggest that when using the anterior tibial cortex line as is commonly done with extramedullary tibial resection guides, the tibial resection should be sloped approximately four degrees more posteriorly.</p>


Subject(s)
Aged , Female , Humans , Male , Middle Aged , Arthroplasty, Replacement, Knee , Methods , Imaging, Three-Dimensional , Methods , Knee Joint , General Surgery , Osteoarthritis, Knee , General Surgery , Tibia , General Surgery
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