Objective To investigate the regulatory effects of glucocorticoids on the local renin-angiotensin system in osteoblasts by using MC3T3-E1 cells.Methods Cellular immune histochemistry was carried out to observe the renin-angiotensin system in osteoblasts.And then after 12-hour culture in serum-free solution,MC3T3-E1 cells were divided into four groups:control,dexamethasone (DXM),dexamethasone + mifepristone (DXM+MIF)and mifepristone (MIF).Components of the renin-angiotensin system including angiotensin type 1 receptor (AT1R),angiotensin type 2 receptor (AT2R)and angiotensin converting enzyme (ACE)in osteoblasts were detected at the mRNA and protein levels using Western blot and PCR.The activity of ACE was also measured after 36-hour intervention.Results The results of immunohistochemistry showed that AT1R,AT2R and ACE were all expressed in osteoblasts.The activity of ACE increased obviously after dexamethasone intervention compared with that in the control group,which was blocked by mifepristone.The mRNA levels of AT1R,AT2R and ACE were increased by dexamethasone compared with those in the control group,which was inhibited by mifepristone.The protein levels of AT1R,AT2R and ACE were enhanced by dexamethasone compared with those in the control group, which was blocked when the cells were co-intervened with mifepristone.However,ACE activity and the mRNA and protein levels of AT1R,AT2R and ACE did not change when the cells were intervened with mifepristone alone (P>0.05).Conclusion The local renin-angiotensin system in osteoblasts is activated by dexamethasone through glucocorticoid receptors on osteoblasts,which may be one of the pathogenesis of glucocorticoid-induced osteoporosis.

The paper analyzes the current status and existing problems of citation retrieval work, puts forward the design principle, overall structure and function of cited references integration tools, demonstrates the key technologies of system realization.An integrated retrieval platform for online literature citations is constructed for the following functions:one-stop retrieval of various citation databases, automatic removal of duplications, so as to reduce the burden of staffs and improve efficiency effectively.

Objective To observe the circadian blood pressure (BP) rhythms and the phase of heart circadian gene expression in adriamycin (ADR)-induced nephropathy rats,thus exploring the effect of circadian systems on circadian BP variation in nephrotic rats.Methods Sprague-Dawley (SD) male rats (8 weeks) were housed in a 12∶12 hour light/dark cycle in two weeks,and randomly divided into ADR group and control group.ADR rats were injected 6.5 mg/kg adriamycin via vein to establish nephrotic rats model two weeks later,while control rats were injected the equal volume of saline.Five rats in each group were implanted with the radio-telemetry into abdominal aortic.After seven days,systolic blood pressure (SBP),diastolic blood pressure (DBP),mean arterial pressure (MAP) and heart rate (HR) were recorded every one minute during 72 hours via radio-telemetry.Three rats in each group were sacrificed in six time points (zeitgeber time=02:00,06:00,10:00,14:00,18:00,22:00) to get the blood sample and heart tissue,respectively.The mRNA expressions of core clock gene CLOCK,BMAL1,Per1,Per2,Cry1 and Cry2 in heart issue were evaluated by the real-time quantitative PCR.The plasma levels of renin activity angiotensin Ⅱ and aldosterone were measured by radioimmunoassay.All the data were analyzed by a partial Fourier analysis and stepwise regression.Results (1) There was no significant difference in 24 h average of SBP,DBP and MAP between two groups.In control group,there was higher SBP (3.22 mmHg),DBP (1.16 mmHg) and MAP (3.19 mmHg) in dark period than those in light period,only SBP and MAP showing statistical difference (all P ＜ 0.05).However,SBP,DBP and MAP had no significant difference between dark and light in ADR group (all P ＞ 0.05).(2) Control rats had (8.0+24.0) h rhythm of SBP,and their DBP,MAP and HR appeared 24.0-hour normal circadian pattern (all P ＜ 0.05).In ADR group,the rhythm of SBP completely disappeared.And their DBP and MAP remained 24.0 h circadian rhythm,but the peak time advanced 1.5 h to 3.0 h compared with SD rats.(3) In SD controls,daily rhythms period of the core clock genes (CLOCK,BMAL1,Cry1,Cry2,Per1 and Per2) mRNA expression in the heart were (4.8+ 12.0) h,24.0 h,12.0 h,(12.0+24.0) h,(4.8+12.0) h and 12.0 h (all P ＜ 0.05),respectively.In ADR rats,the rhythm of CLOCK,BMAL1,Cry2,Per1 and Per2 mRNA completely disappeared (all P ＞ 0.05).The circadian rhythm of Cry1 mRNA remained,but the period was changed from 12.0 h to (4.8+6.0) h.(4) The plasma renin and aldosterone concentration presented 12.0 h and 24.0 h daily rhythms in SD rats (all P ＜ 0.05).These diurnal changes however completely disappeared in ADR rats (all P ＞ 0.05).Conclusions ADR nephrotic rats lose the circadian rhythm of BP with the disturbances of cardiac circadian clock system.The disrupted diurnal rhythm of the core clock genes (CLOCK,BMAL1,Cry2,Per1 and Per2) mRNA expression in the heart may regulate the pathological circadian rhythms of heart tissue,which is involved with disturbances of circadian rhythm of BP.

Objective To investigate the diagnostic value of dual-energy CT pulmonary angiography (DE-CTPA) and dual-energy CT lung perfusion (DE-CTLP) in the assessment of pulmonary embolism comparing with pulmonary ventilation-perfusion scintigraphy. Methods Fifty patients suspected of PE (26 males, 24 females) underwent both DE-CTPA, DE-CTLP and pulmonary ventilation-perfusion scintigraphy. The results were compared and the correlation between the intravascular clots in DE-CTPA and the perfusion defects in DE-CTLP was analyzed. The sensitivity, specificity and accuracy of DE-CTLP for PE were assessed according to scintigraphic results which was considered as a "gold" standard. Result ( 1 ) Of 50 cases,920 segments in 46 cases were diagnostable, 4 cases were not included because of the poor image quality. lntravascular clots were found in 262 segments on DE-CTPA and perfusion defects in 266 segments were identified on DE-CTLP, while 268 segments were positive on scintigraphy. (2) The perfusion defects on DE-CTLP were correlated well with the clots on CTPA ( r = 0. 883, P < 0. 01 ). The Dual energy CT Lung perfusion imaging had a good consistence with scintigraphy (Kappa = 0. 940, P <0. 01 ). The sensitivity, specificity, positive and negative predictive value were 96. 2% (279/290), 98.0%(641/654), 95. 5% (279/292) and 98. 3% (641/652), respectively. (3)The radiation dose of DE-CTPA and CE-CTLP scan was(4. 37 ± 0. 47) mSv by using CareDose 4D technique. Conclusion DE-CTPA and CE-CTLP can provide pulmonary vascular morphology and parenchyma perfusion information which are useful and valuable for the diagnosis of PE.

Objective To explore the feasibility of evaluating cardiac structure, coronary artery,pulmonary artery and cardiac function in one single scan by 320-row CT ECG-gated double phase cardiac function scan mode. MethodsForty patients underwent the 320-detector row CT double phase cardiovascular angiography. The pulmonary phase and aortic phase were reconstructed in order to evaluate the pulmonary and coronary artery. MPR reconstructions of both pulmonary and aortic phase were used to analyze the function of the two ventricles. And the results of the cardiac function were compared with those of transthoracic echocardiography. Thirty-five cases could be analyzed and diagnosed, while the other 5 cases had to be given up because of the poor imaging quality. The mean heart rate was (71.2 ± 11.2) beat per min (bpm). No arrhythmia case included. Results ( 1 ) Pulmonary embolism were diagnosed in 11 cases,coronary artery disease (CAD) were found in 5 cases, while post-stent implantation were observed in 7 cases. Six cases of congenital heart disease were diagnosed with 3 ASD and 3 primary pulmonary hypertension. Another one was diagnosed with left atrial myxoma, and 5 cases were pulmonary embolism associated with CAD. All of above cases were verified by final clinical diagnosis. (2) The heart function parameters including LVEDd , RVEDd, LVESd, RVESd and LVEF were (36.7 ±3.3), (43.3 ± 3.4) mm,(31.6±5.1), (41.3 ±5.1) mm and (47.1 ±15.1) for CT, while those were (40.3 ±3.1), (47.3 ±4.2) mm,(37.3 ±5.6), (45.3 ±3.3) mm,and (46.0 ± 14.8) for ultrasound, respectively. The CT results were correlated with the ultrasound ( n = 35, r = 0.886-0.988, P ＜ 0.01 ). (3) The average radiation exposure was ( 5.4 ± 0.5 ) mSv. Conclusions 320-row CT ECG-gated double phase cardiac function scan mode is feasible for the "one-stop-shop" examination of the cardiovascular disease. This noninvasive method is recommended for the diagnosis, differential diagnosis, treatment and prognosis of cardiovascular disease.

After an overall introduction of the novel functions of the CMCI institutional knowledge version developed by Medical Library of Chinese PLA , its coverage of institutions, authors, funds, journals and literature was de-scribed in terms of RDE semantics.The contents in literature were mined and analyzed in depth based on the litera-ture-marked information with the institutions database, funds database, journals database and literature database as their cores, the association of information resources in biomedical field was thus realized.The CMCI institutional knowledge version can be used to search published papers and citations, write citation reports, enforce bibliometric visualization analysis, issue different top-ranked statistical data, push associated information, increase institutional literature management modules, and provide personal literature management and assessment service for different in-stitutions.

Decoction is one of the most commonly used dosage forms of traditional Chinese medicine. The stability of chemical constituents in decoction is closely related to the clinical efficacy and safety. There were few reports about the influence of metal ions in the stability of chemical constituents in traditional Chinese medicine. However, there is no evidence that metal ions in decoction water need to be controlled. In this study, 2,3,5,4'-tetrahydroxy stilbene-2-O-β-D-glucoside (THSG), one of the main constituents in Polygoni Multiflori Radix was studied. Ordinary tap water, deionized water, and water containing different metal ions were used to investigate and compare the influence on THSG. The results showed that after storage in a dark place at the room temperature for 10 days, the degradation of THSG was 7% in deionized water, while undetectable in tap water. The content of THSG could be decreased by different kinds of metal ions, and the effect was concentration-dependent. Moreover, Fe3+ and Fe2+ showed the greatest influence at the same concentration; and our study has shown that THSG decreased more than 98% in Fe and Fe2+ solutions at 500 ppm concentration. In the same time we found out p-hydroxybenzaldehyde (molecular weight: 122.036 7) and 2,3,5-trihydroxybenzaldehyde-2-O-glycoside (molecular weight: 316.079 4) were the main degradation products of THSG in tap water and water containing Cu2+, Ca2+, Zn2+, Mg2+ and Al3+. The product of THSG dimer with a water molecule was found in water containing Fe3+ and Fe2+. The above results showed that the metal ions in water could significantly influence the stability of THSG in water, indicating that the clinical efficacy and safety of decoction would be affected if the metal ions in water were not under control. It's suggested that deionized water should be used in the preparation of decoction containing Polygoni Multiflori Radix in the clinic to avoid degradation of THSG. Meanwhile, decoction prepared by tap water should be taken by patients in a short time. Our investigation provides important information and reference about the influence of metal ions on the stability of decoctions in other traditional Chinese medicine that have unstable groups such as hydroxyls and unsaturated bonds, etc.

Objective:To measure with Zhejiang province as an example the situation of the self-evaluation health management service capability of primary medical staff in county-level medical alliances.Methods:A self-evaluation scale for health management service capability by primary medical staff was customized, covering 5 dimensions of professional attitude, interpersonal communication ability, comprehensive knowledge integration ability, professional practice ability and professional development ability, as well as 29 items. In July-September 2019, medical alliances were selected from three counties/cities based on economic development as the survey targets, and a total of 264 primary medical staff were surveyed. Quantitative data were described in mean and standard deviation, while qualitative data were described in composition ratio, and the differences were compared by Kruskal-Willis test.Results:The self-evaluation scoring of health management service capability of the primary medical staff was (59.75±18.64) points, and the average scoring of the items was (2.06±0.64) points. The scoring of knowledge integration (1.98±0.70)and professional practical ability (2.03±0.67) were lower than the average scoring of the items; gender and occupation type of primary medical staff present statistical significances in the self-evaluation scoring of health management service capability.Conclusions:Given the health management service capabilities of primary medical staff, they still need to upgrade their knowledge integration and professional practice capabilities. County-level medical alliances should enhance their training of health management knowledge and skills, promote doctor-nurse collaboration in health management services to broaden the depth of primary health management services.

Objective:To explore the clinical features and prognosis of simultaneous double primary and single primary colorectal cancer patients.Methods:A retrospective case series study was conducted. The clinical data of 45 patients with simultaneous double primary colorectal cancer, 53 patients with single primary colon cancer and 59 patients with single primary rectal cancer in Shanxi Province Cancer Hospital from January 2015 to January 2018 were retrospectively analyzed, including gender, age, drinking history, smoking history, body mass index (BMI), carcinoembryonic antigen (CEA), carbohydrate antigen 199 (CA199), hemoglobin, albumin, TNM stage. The clinicopathological characteristics of the three groups were compared. Survival analysis was performed using the Kaplan-Meier method to compare the overall survival of the three groups.Results:The age of simultaneous double primary colorectal cancer patients was (63±11) years old, including 28 males and 17 females; the age of single primary colon cancer patients was (61±12) years old, including 30 males and 23 females; the age of single primary rectal cancer patients was (60±11) years old, including 30 males and 29 females. There was a significant difference in BMI between patients with double primary cancer and single primary colon cancer ( P = 0.041), but there were no significant differences in gender, age, drinking history, smoking history, CEA, CA199, hemoglobin, albumin and TNM stage (all P > 0.05). There were significant differences in BMI, CEA and CA199 between patients with double primary cancer and single primary rectal cancer (all P < 0.05), but there were no significant differences in gender, age, drinking history, smoking history, hemoglobin, albumin and TNM stage (all P > 0.05). The 1-, 3- and 5-year overall survival rates of the double primary cancer patients were 95.56%, 77.78% and 62.22%, the single primary colon cancer patients were 94.34%, 81.13% and 69.81%, and the single primary rectal cancer patients were 100.00%, 88.14% and 72.88%, respectively. There was no significant difference in OS among patients with double primary cancer, single primary rectal cancer and single primary rectal cancer (both P > 0.05). Conclusions:Abnormally elevated BMI may be associated with the risk of developing simultaneous double primary colorectal cancer. Detection of CEA and CA199 is helpful in monitoring rectal cancer patients for the combination of other primary tumors. The prognosis of patients with single primary colon or rectal cancer is comparable to that of patients with simultaneous double primary colorectal cancer.

OBJECTIVETo confirm the genetic diagnosis of two patients with ring chromosome 22 syndrome and investigate the mechanism underlying the formation of r(22) and potential genetic causes for the clinical phenotypes.

METHODSCytogenetic and molecular analyses using standard G-banding, fluorescence in situ hybridization and single nucleotide polymorphism array (SNP array) were performed.

RESULTSFor case 1, the karyotype was 46,XY,r(22)(p11q13). SNP array has identified a 7.0 Mb heterozygous deletion at 22q13.2q13.33. For case 2, the karyotype was 46,XY,r(22)(p11q13)[84]/45,XY,-22[6]; SNP array has detected a heterozygous microdeletion of 1.6 Mb at 22q13.33.

CONCLUSIONWith combined application of genetic testing, 2 cases of r(22) syndrome were diagnosed, which has improved the understanding of the genotype-phenotype correlation of r(22).

Child, Preschool ; Chromosome Banding ; Chromosomes, Human, Pair 22 ; genetics ; Genetic Testing ; Humans ; Male ; Nerve Tissue Proteins ; genetics ; Oligonucleotide Array Sequence Analysis ; Polymorphism, Single Nucleotide ; Ring Chromosomes