BACKGROUND:In the whole world, spinal cord injuries caused by trauma lead to more than 180 000 people presenting with permanent impairment annualy. A large number of experiments have confirmed in recent years, under physiological conditions, microRNA has specific expression and plays an important role in the nervous system. OBJECTIVE: To discuss the changes in microRNA expression induced by injuries as wel as the pathophysiological significance in spinal cord injury, and to explore the development potential of microRNA in tissue-engineered and clinical repair of spinal cord injury. METHODS:A computer-based search of PubMed and Chinese Journal Database was performed for related articles published from January 2000 to December 2014 using the keywords of “SCI, microRNA, transcriptional control, clinical research progress” in English and Chinese. Finaly, 38 articles were included for result analysis. RESULTS AND CONCLUSION: Mechanical injury initialy triggers a series of complex secondary damages, including nervous, vascular and immune systems, which can influence the severity of spinal cord injury to a great extent. Secondary damage to the spinal cord is mainly attributed to the activation and deactivation of some specific genes associated with celular and biochemical mechanisms, such as cysteine aspartate specific protease (caspase) gene family, apoptosis related protein Fas and its ligand Fasl system, P53 gene, apoptosis related gene Bcl-2 family. Recent studies have proved that the functional activation of microRNA expression is the key to spinal cord injury. With the development of biological information engineering, studies and controling technologies associated with microRNA expression have been gradualy dominated, some clinical application based on microRNA technology has entered the clinical trial stage. It is believed that with the continuous development of technology and decrease of cost, permanent dysfunction due to spinal cord injury can be regulated and repaired through the microRNA technology at gene level in the future.

BACKGROUND: Borneol can open blood-brain barrier (BBB) but the mechanisms are not very clear. Histamine and 5-hydroxtryptamine can take part in regulation of permeability of BBB. There is not report on the rela tion between the effect of opening BBB of borneol and the regulation of permeability of BBB of histamine (HA)/5-hydroxytryptamine (5-HT). OBJECTIVE: To study the relation between the effect of opening BBB of bornool and the regulation of permeability of BBB of histamine (HA)/5-hydroxytryptamine (5-HT).DESIGN: A completely randomized and controlled study.SETTING: Clinical Pharmacological Institute of University of Traditional Chinese Medicine of Guangzhou.MATERIALS: The experiment was carried out at the Clinical Pharmacological Institute of University of Traditional Chinese Medicine of Guangzhou from September 2003 to February 2004. Totally 104 healthy male SD rats, weighting 230-27.0 g, supplied by Guangdong Medical Experimental Animal Center, were selected.METHODS: The rats were randomly divided into 13 groups: pre-medicine group and post-medicine group (high, moderate and low dosage group and 5, 20, 45 and 60 minutes group in each dosage group) with 8 in each group. Borneol was mixed as 10% millet oil suspension. Rats were fasted before experiment for whole night, and medicine was perfused on the next morning with the high, moderate and low dosage of 0.15, 0.12 and 0.09 g/kg respectively. Hypothalami of rats was selected at various time points to make biological samples. Contents of HA and 5-HT were assayed with HPLC system electrochemical detector.MAIN OUTCOME MEASURES: Changes of level of histamin (HA) and 5-HT in hypothalamus of rats after administration of borneol.RESULTS: Data of totally 104 rats was entered the final analysis. ① Contents of HA and 5-HT in hypothalami were 2.07±0.54 μg/g and 1.45±0.14 μg/g respectively. ② The level of HA in hypothalamus of rats after different doses of borneol were higher than that of before administration. Comparing the level of HA in 20 minutes after moderate dose with before administration, the level of HA in 20 minutes was increased significantly [(3.36±0.21) μg/g, P < 0.01], the others of moderate dose, the 45 minutes after high dose, the 20 and 45 minutes after low dose were also increased significantly than before administration (P < 0.05). ③ After administration of different doses of borneol, the level of 5-HT after high dose were higher than that of before administration [5, 20, 45 and 60 minutes after medicine: (1.90±0.32), (3.28 ±0.25), (2.66±0.46), (2.80±0.34) μg/g, respectively; (P < 0.05 or P < 0.01)]; the level of 5-HT after 5, 20 and 45 minutes of moderate and low dose were increased significantly too (P < 0.05 or P < 0.01).CONCLUSION: Borneol could open BBB by increasing levels of HA and 5-HT in hypothalamus of rats.Borneol mediates opening of BBB by increasing levels of HA and5-HT in rats.

Objective:To analyze the status of prevention and control of COVID-19 in primary care institutions at the early stage of the epidemic.Methods:Thirty healthcare professionals from various places of China were recruited in the study from 6 thto 16 th February 2020 through WeChat platform advertising and by purposive sampling method. They were general practitioners (GPs), administrators, and other specialists, all of whom were involved in the prevention and control of COVID-19. Personal interview and focus group discussion were conducted online. The topic guide was as follows: (1) Introduction of the work that primary healthcare professionals carried out during the outbreak of COVID-19. (2) Difficulties and challenges that healthcare professionals encountered. (3) Opinions on the prevention and control of COVID-19. (4) Advices on future outbreak of similar epidemics or disease. NVivo 12 software system was used to code and classify the interview content, and thematic framework analysis was used to sort out and analyze the data and extract the interview themes. Results:Six themes were extracted: (1) The community hospital leaders led the work in time but job distribution and prevention procedures were insufficient; and the workload of GPs was heavy. (2) Primary care settings had carried out pre-screening and triage; while outpatient clinic continued to provide health care service for local residents, especially stressing online service and consultation to reduce the population mobility. (3) GPs should make full use of technical advantages and participate in joint prevention and control. (4) GPs offered various health education to residents to improve their awareness of self-protection. (5) GPs lacked professional skills and needed more related training, while the current training were still insufficient. (6) There were not enough supplies and GPs had increasing worries about the infection risks.Conclusions:GPs play an important role in effectively curbing the spread of the epidemic. It is suggested that the setting of triage and fever clinic in primary care institutions need to be readjusted; and the training of prevention and control knowledge and skill for GPs need to be strengthened in the future.

Animals ; Apoptosis ; drug effects ; Aurovertins ; toxicity ; Cells, Cultured ; DNA Damage ; drug effects ; Female ; Male ; Myocytes, Cardiac ; drug effects ; Rats ; Rats, Wistar

Objective To investigate the FH/Wjd rat model of alcoholic liver disease.Methods Thirty-six 16-18 week old SPF grade FH/Wjd rats (male:female=1:1) were used in this study.The rats were divided into two groups randomly by body weight:water intake group and alcohol intake group.The rats took water or alcohol freely.16 weeks lat-er, ALT, AST, TBIL, TG, CHO in the serum and TG, GSH in the liver homogenate were detected.The expression of PPARαprotein in the liver tissue was detected by Western blot.The apoptosis rate of liver cells was assessed by flow cy-tometry.The pathological changes of liver tissue were examined using HE staining.Results Compared with the water in-take group, the serum TBIL and TG were significantly increased in rats of both sexes of the alcohol intake group, moreover, ALT and CHO of the female rats in the alcohol intake group were significantly decreased.TG in the liver homogenate in-creased obviously, while GSH in the liver homogenate showed a decreasing tendency.Hepatocyte apoptosis in rats of both sexes in the alcohol intake group showed an increasing tendency.The PPARαprotein expression was up-regulated obvious-ly, and the main pathological change in the liver tissue was microvesicular fatty degeneration.Conclusion Spontaneous long-term alcohol intake can induce liver injuries in FH/Wjd rats.

Childhood nonalcoholic fatty liver disease (NAFLD) is one of the most common cause of chronic liver diseases in children and adolescents; its unique histopathological and clinical features may lead to its progression to liver fibrosis, liver cirrhosis, and liver cancer, and compared with adult NAFLD, it is more likely to cause other diseases and increase mortality rate. Therefore, early identification of risk factors for childhood NAFLD, effective screening of high-risk population, active prevention, and early diagnosis and treatment are key to effective clinical management of this disease. This article elaborates on the risk factors, screening methods, and preventive healthcare measures for childhood NAFLD, in order to standardize the comprehensive management of NAFLD, reduce the prevalence rate of NAFLD, delay its progression, and alleviate the economic and public health burden brought by the disease.

Objective To study the clinical features of target organ damage in children with essential hypertension.Methods From Jan.2007 to Oct.2013,86 children were enrolled who were diagnosed as essential hypertension in the Children's Hospital Affiliated to Capital Institute of Pediatrics.All children received the following examinations:fundus oculi,electrocardiogram,echocardiography,serum triglyceride,glucose,insulin,C peptide,uric acid,renal function,urine microalbumin,serum and urine β2-microglobulin.All data were collected as standard procedure and analyzed by using statistic methods.Results In all recruited children,there were 68 boys (79.1％)and 18 girls (20.9％) with the average age of (12.3 ±2.4) years old.There were 46 children(53.5％) with grade Ⅰ hypertension and 40 (46.5％) with grade Ⅱ hypertension,13.5％ (7/52 cases) of the children with retinal vessel damage,21.0％ (17/81 cases) with abnormal electrocardiogram,and 2.6％ (2/78 cases) with left ventricular hypertrophy and increased left ventricular posterior w all thickness.Thirty-seven percent (30/81 cases) of the children had a higher voltage of R wave in V5 than average values at the same ages.Renal damage mainly included increased serum creatinine and microalbuminuria,with the rates of 40.2％ (33/82 cases) and 39.7％ (23/58 cases),respectively.Metabolic disorders mainly included 87.5％ (56/64 cases) hyperuricemia,32.5％ (25/77 cases) hypertriglyceridemia,22.1％ (19/86 cases) hepatic adipose infiltration,and 36.1％ (30/83 cases) hyperinsulinemia or sugar intolerance damage.There were 58 (67.4％) children wit h obesity.Compared with normal weight children,children with obesity had a higher rate of target organ damage(98.3％ vs 82.1％,x2 =5.291,P =0.021),and hyperinsulinemia or sugar intolerance damage(45.5％ vs 17.9％,x2 =6.123,P =0.013).Children with the course longer than 6 months showed a higher rate of hyperinsulinemia or sugar intolerance damage than the children with the course less than 6 months(50.0％ vs 25.5％,x2 =5.788,P =0.021).Conclusions Target organ damage caused by adolescent essential hypertension is present at diagnosis in most of these children.Electrocardiogram and echocardiography are effective measures for early detection of cardiac damage of hypertension.Serum uric caid and urine microalbumin can be used as early warning and screening indexes.To enhance blood pressure monitoring of children with obesity will be helpful for early diagnosis of essential hypertension,which will decrease the rate of target organ damage with earlier effective interference.

Objective To evaluate the clinical results of the thumb dorsoradial flap and the greater thenar flap for coverage of thumb soft tissue defect,and to provide guidance on clinical selection of flaps.Methods From January,2013 to June,2014,23 thumb dorsoradial flaps and 20 greater thenar flaps were used to repair the soft tissues defects in thumbs and were followed up to compare the results.Patient satisfaction,cold intolerance scores,TAM of the reconstructed thumb,sensation (pain and temperature sensation,Semmes-Weinstein monofilament test,static two-point discrimination) and blood perfusion of the flaps were recorded and analyzed statistically.Results Thumb dorsoradial flaps group:patient satisfaction was (36.97 ± 7.70)％,cold intolerance score was 58.96 ± 12.47,TAM of the thumb was (87.57 ± 12.83)°,median Semmes-Weinstein monofilament test was 3.61mm,static two-point discrimination was (14.22 ± 2.84)mm,and blood perfusion was (98.41 ± 15.66) PU.Greater thenar flaps group:patient satisfaction was (50.00 ± 10.80)％,cold intolerance score was 60.45 ± 14.10,TAM of the thumb was (95.00 ± 14.58)°,median Semmes-Weinstein monofilament test was 4.31mm,static twopoint discrimination was (20.70 ± 2.56)mm,and blood perfusion was (104.74 ± 14.12)PU.The greater thenar flap had a larger degree of satisfaction than the dorsoradial flap (P ＜ 0.05).Both pain and temperature sensation of the flap were regained in all cases,but the dorsoradial flap presented better Semmes-Weinstein monofilament score and static two-point discrimination(P ＜ 0.05).No differences were found regarding TAM of the thumb,cold intolerance score and blood perfusion of the flap (P ＞ 0.05).Conclusion The dorsoradial flap is suitable for repairing the thumb pulp defect due to its good sensation.For the small defect of non-functional dorsal area,the greater thenar flap will be a satisfactory method.

The aim of our study was to determine the effects of energy controllable steep pulse (ECSP) on the cytoskeleton of human ovarian cancer cells SKOV3. SKOV3 cells were divided into five groups under ECSP treatment with different parameters (frequency, pulse duration, peak value of voltage). The positive control group included SKOV3 cells treated with volchicine; the negative control group included SKOV3 cells subjected to sham-lightning stroke. Rhodamine-phalloidine was used to label microfilament directly. After using immunofluorescence to label microbules, we observed them by means of Confocal Laser Scanning Microscope. Making specimen and using electronmicroscope, we observed the ultramicrostructure of cystoskeleton. The results showed that ECSP-treated-SKOV3 cells lost their normal cystoskeleton network structure. There were obvious microfilament disaggregation, diffused skeleton protein, and disappearance of cystoskeleton network structure. Also noticeable were microbule disaggregation, reduction of pseudopod, obvious microfilament disaggregation, permutation disorder and structure disappearance. Moreover, this effect bears a direct relation with dosage.
Cell Line, Tumor ; Cytoskeleton ; ultrastructure ; Electric Conductivity ; Electromagnetic Fields ; Electroporation ; Female ; Humans ; Ovarian Neoplasms ; pathology ; Pulse

Objective To retrospectively evalute the value and accuracy of adenosine stress and rest SPECT myocardial perfusion imaging. Methods A total of 1858 patients who were suspected or known for coronary artery disease (CAD) underwent 99Tcm-methoxyisobutylisonitrile ( MIBI ) myocardial perfusionSPECT with adenosine infusion using the standard 2-day protocol. Images were interpreted by two or more experienced nuclear medicine physicians . Coronary angiography was carried out in all patients within one month. Kappa test was used to analyze the correlation between the two imaging studies. Results By coronary angiography, there were 957 patients diagnosed of CAD (one-, two-, three-vessel disease: 506,256,195, respectively) and 901 normal. Stenosis was found in 1603 vessels, including left anterior descending coronary artery (LAD): 765, left circumflex coronary artery (LCX): 399 and right coronary artery (RCA): 439. By adenosine induced stress myocardial perfusion imaging, 876 patients were diagnosed of myocardial ischemia ( sensitivity: 876/957, 91.54% ) and 651 patients had negative findings ( specificity:651/901,72.25 % ). The positive and negative predictive values were 77.80% ( 876/1126 ) and 88.93% (651/732), respectively. The correlation coefficient between the two imaging studies was 0.641. The vessel-based sensitivity was 81.31% (622/765) for LAD, 56.64% (226/399) for LCX and 70.62% (310/439) for RCA, respectively. The sensitivity for detection of one-, two-, three-vessel stenosis was 87.55% (443/506), 94.92% (243/256) and 97.44% (190/195), respectively. The side-effects was mild and transient with an incidence rate of 84.12% ( 1563/1858), without major cardiac events. Conclusion Stress myocardial perfusion imaging induced by adenosine is reliable for the evaluation of myocardial blood supply in CAD patients.