Abstract: Objective To collect the cases of laboratory-acquired infections (LAI) reported in literatures in China, summarize the infection routes and causes of LAI in China, in order to improve laboratory staff's understanding of its occupational health and safety risks. Methods　The cases of laboratory-acquired infection reported in domestic literatures were collected from PubMed, CNKI, Wanfang Database, CBM China Biomedical Literature Database up to April 11, 2022, retrospectively analyze the number and causes of LAI reports, the main risk factors of LAI and its harm to society, the consequences of LAI or the leakage of pathogenic microorganisms, and put forward the relevant countermeasures of biological safety. Results　A total of 22 LAI reports were collected, reviewed and integrated into 21 reports. There were 7 kinds of pathogenic microorganisms. The main pathogenic microorganisms were hantavirus (42.86%, n=9) and Brucella (33.33%, n=7). There were 122 cases and 3 deaths in the laboratory. Most of the reports came from research laboratories (66.67%, n=14). The main route of infection was inhalation of aerosol (42.86%, n=9), followed by transdermal route (38.09%, n=8). Conclusions Failure to report LAI events will increase the risk of pathogenic microorganisms spreading to people outside the laboratory and the environment through infected laboratory staff. Local health institutions and laboratories should be encouraged to report LAI cases as a powerful tool for monitoring accidental leakage of pathogenic microorganisms and further improving laboratory biosafety. The laboratory needs strong biosafety measures to protect staff's health and prevent environmental pollution caused by accidental leakage of pathogenic microorganisms.

Objective To evaluate the prevention of glucocorticoid -induced avascular necrosis of the femoral head(ANFH)with Tongluo Shenggu Capsule(TSC).Methods One hundred and twenty adult SD rats were randomized into six groups:normal control group,model group,clofibratum group and three -dose TSC groups(high -,moderate -and low -dose respectively).ANFH rat models were established by injection of glucocorticoid once per week and the med-ication groups were given drugs by ga stric infusion one time a day.The rats were killed in the fourth,eighth and twelfth week respectively.Then the macrosc opic and microscopic feature of the f emoral head were observed,and ink -p erfused specimens of the femoral head were detected and analyzed by auto -photograph software of Metamoph to evaluate the pre-ventive effect of TSC.Results In TSC groups,bone trabecula grew we ll,similar to the normal group;lacu nar bone per-centage was lower than that in the mod el group;fatty degeneration in marrow cavity of the femoral head was redu ced,andthe number of subcartilaginous bloo d vessels and their diameter were increased as compared with those in the model group(P

Objective To explore the change characteristics of physiological indexes between infants and children during living-donor liver transplantation and discuss methods of regulation and control.Method In this study,42 patients were selected and assigned into two groups according to age:infants group (＜1 year,n =25),and children group (1-16 years,n =17).The preoperative and peri-operative characteristics,intra-operative operation conditions,internal environment changes before and after re-perfusion,postoperative mechanical ventilation time,ICU time,hospital time,infection rate,additional surgery,complications and survival were analyzed.Result PELD (MELD) score,historical surgery rate and hematokrit were lower in children group than in infants group (P＜ 0.05).Serum creatinine and lactate concentrations increased significantly in children group as compared with infants group (P＜0.05).Intra-operative an-hepatic phase and cold ischemia time were shortened significantly (P ＜ 0.05),and incidence rate of re-perfusion syndrome was reduced in children group as compared with infants group (P＜0.05).As compared with pre-re-perfusion,blood lactate concentrations were significantly raised only in infants group and glucose concentrations significantly raised only in children group (P＜0.05).The blood levels of K + were decreased after reperfusion in both two groups,and those in infants group were lower than in children group (P＜ 0.05).Postoperative intensive care unit time was longer in children group than in infants group (P＜ 0.05),and there was no significant difference in survival rate between two groups.Conclusion There are many differences and change characteristics to physiological indexes between infants and children during the operation of living-donor liver transplantation.Timely management and regulation are critical for the success of surgery according to the differences.

OBJECTIVE:To study the stability of Fuke zhidai capsule at accelerated testing and room temperature. METHODS:HPLC was conducted to determine the content of berberine hydrochloride in the preparation:the column was Diamonsil C18 with mobile phase of B methanol-0.7% triethylamine(pH adjusted to 3 by phosphate)(50:50,V/V)at a flow rate of 1 ml/min;detec-tion wavelength was 265 nm,with a column temperature at 45 ℃,and the injection volume was 5 μl;its moisture,disintegration time,accelerated stability and long-term stability were studied according to the 2015 edition of Chinese Pharmacopoeia. RE-SULTS:The linear range of berberine hydrochloride was 0.0217-0.1736 mg/ml(r=0.9999);RSDs of precision,stability and re-producibility tests were lower than 2%;recovery was 97.24%-101.73%(RSD=1.72%,n=6). CONCLUSIONS:The moisture,dis-integration time,accelerated stability and long-term stability were all in line with the quality standards.

Objective To evaluate the role of 5-HT5A receptors (5-HT5A R) in activation of astroglia in the spinal dorsal horn in a rat model of neuropathic pain induced by vincristine. Methods Forty adult male SD rats weighing 180-200 g were randomly divided into 4 groups ( n = 10 each): control group (group C);neuropathic pain group (group P);Ad-X-HK group (group B) and Ad-5-HT5A-siRNA group (group S). Neuropathic pain was induced by repeated intraperitoneal (IP) injection of vincristine 0.1 mg/kg according to the method described by Weng et al in group P, B and S. On the 2nd day after the last IP injection, the animals received artificial cerebrospinal fluid, Ad-X-HK and Ad-5-HT5A-siRNA 25 μl administered intrathecally (IT) in group P, B and S respectively. Paw withdrawal threshold to mechanical stimulus was measured before and on the 7th day after IT administration. The animals were then sacrificed. The lumbar segment ( L4.5 ) of the spinal cord was removed for determination of 5-HT5A R and GFAP expression. Results Body weight and paw withdrawal threshold were significantly decreased after repeated IP vincristine administration in group P compared with group C. IT Ad-5-HT5A-siRNA reduced pain threshold further in group S compared with group P. Repeated IP vincristine significantly increased the expression of 5-HT5A R and GFAP in spinal dorsal horn, and IT Ad-5-HT5A-siRNA significantly decreased the expression of 5-HT5A R while increased the expression of GFAP in spinal dorsal horn in group S compared with group P. Conclusion 5-HT5AR is involved in the inhibition of astrocyte activation, resulting in reduction of vincristineinduced neuropathic pain.

Objective To explore the therapeutic effect and medication safety of low-dose erythromycin treatment on intractable allergic rhinitis(AR) associated with bronchus asthma.Methods Totally 173 cases of children received outpatient treatment because of AR associated with asthma,their ages ranging from 3 to 14 years.Among them,78 cases developed intractable AR with symptoms of asthma having been controlled or satisfactorily controlled after 2 courses of conventional treatment.Seventy-six children with intractable AR received full follow-up and were randomly divided into observation group and control group.The control group was given different second-generation antihistamines,when necessary,supplemented by nasal glucocorticoids.In the observation group,the same treatment as it was done in control group was continued,plus oral treatment with erythromycin enteric-coated capsules(10 mg?kg-1?d-1,which were taken 3 times a day for 1 month) to the observation group.Both observation group and control group were in accordance with the norms of the treatment of asthma.Results The improvement rate,inefficiency and the total efficiency were different between observation group and control group,and the diffe-rence was statistically significant(?2=12.629,8.412,8.412,Pa0.05).Their liver function was also monitored and was found normal before treatment and after the replacement of drugs for 1 month,including alanine ami-notransferase,aspartate aminotransferase,albumin,globulin,and were found normal.Conclusions On the basis of conventional treatment,low-dose erythromycin treatment of intractable AR is effective and safe.However,the treatment must be limited to the refractory cases,and the appropriate indications must be strictly observed.

OBJECTIVETo investigate the effect of propofol on brain regions at different sedation levels and the association between changes in brain region activity and loss of consciousness using blood oxygen level-dependent functional magnetic resonance imaging (BOLD-fMRI) and bispectral index (BIS) monitoring.

METHODSForty-eight participants were enrolled at Peking Union Medical College Hospital from October 2011 to March 2012 and randomly assigned to a mild or a deep sedation group using computer- generated random numbers. Preliminary tests were performed a week prior to scanning to determine target effect site concentrations based on BIS and concomitant Observer's Assessment of Alertness/Sedation scores while under propofol. Within one week of the preliminary tests where propofol dose-response was established, BOLD-fMRI was conducted to examine brain activation with the subject awake, and with propofol infusion at the sedation level.

RESULTSMild propofol sedation inhibited left inferior parietal lobe activation. Deep sedation inhibited activation of the left insula, left superior temporal gyrus, and right middle temporal gyrus. Compared with mild sedation, deep propofol sedation inhibited activation of the left thalamus, precentral gyrus, anterior cingulate, and right basal nuclei.

CONCLUSIONMild and deep propofol sedation are associated with inhibition of different brain regions, possibly explaining differences in the respective loss of consciousness processes.

Adult ; Brain ; drug effects ; Consciousness Monitors ; Deep Sedation ; Dose-Response Relationship, Drug ; Humans ; Hypnotics and Sedatives ; pharmacology ; Male ; Propofol ; pharmacology

Objective To study the expression of the tumor suppressor gene TSHR and pl6 in papillary thyroid carcinoma (PTC) and explore the relationship of the tumorigenesis and the promoter aberrant methylation of the two above genes. Methods RT-PCR was used to detect the mRNA expression of two tumor suppressor genes in 50 cases of PTC, 20 cases of nodular goiter and 12 cases of thyroid adenoma tissue. The promoter methylation status of the two genes were detected by methylation-specific PCR technique (MSP) (which of p16 by nested PCR). The promoter hypermethylation of the two genes was tested by randomly gene sequencing. Results Hypermethylation of promoter region were detected from 68.0 % (34/50) TSHR gene and 54.0 % (27/50) pl6 gene in PTC, while 21.9 % (7/32) and 15.60 % (5/32) in controls. The rate of promoter methylation in PTC was significantly higher than that in controls (χ2 = 16.61, P <0.05 vs χ2 =12.08 P <0.05). The relative mRNA expression of TSHR gene and pl6 gene were (0.41±0.11) and (0.51±0.17) in PTC, respectively, while those were (0.63 ±0.08) and (0.72 ±0.22) in controls, respectively. The mRNA expression of the TSHR gene and pl6 gene was obviously lower in PTC than that in controls (t = 3.86, P < 0.05 vs t =3.66, P <0.05). By the sequencing, it was confirmed that the CG in methylated promoter of the two genes was not changed, while the CG in unmethylated promoter was changed into TG. Conclusion Methylation of the TSHR gene and p16 gene in promoter region is a common molecule event and may be invovled in the genesis and development of human PTC.

AlM: To examine the retinal nerve fiber layer ( RNFL ) changes in early primary open angle glaucoma ( POAG ) by comparing the superior half of the optic disc with the inferior disc half.METHODS: lt was a clinical observational study. The study included 30 patients ( 39 eyes ) with POAG and 20 normal subjects ( 40 eyes ) . Visual field was tested by Zeiss Humphrey750 and the optic disc topographic parameters and RNFL thickness were measured by Zeiss Cirru HD-OCT. Collecting information included visual field mean defect ( MD ) , glaucoma hemifield test ( GHT ) , intraocular pressure ( lOP ) , C/D ratio and RNFL thickness. Data were analyzed by statistic software SPSS18. 0. The differences between two groups were assessed using t test.RESULTS: The differences of superior RNFL minus inferior RNFL thichness on the corresponding clock-hour locations were caculated in two groups. There was a significant difference in superonasal- inferonasal RNFL thickness between two groups (t=2. 526, P=0. 014), and there were no significant differences in the others ( all P>0. 05).CONCLUSlON: The asymmetry of optic disc hemifield RNFL is found in early primary open angle glaucoma patients. The superonasal RNFL ( 1 o’clock for right eye, and 11 o’clock for left eye ) is more fragile to loss than inferonasal RNFL (5 o’clock for right eye, and 7 o’clock for left eye) .