Objective To optimize the culture conditions of four vaccine candidates of severe acute respiratory symptom coronavirus 2(SARS-CoV-2) Omicron variants BA.1,BA.1.1,BA.2 and BA.5 in Vero cells.Methods The harvest time(24,48,72 and 96 h) and MOI(0.01,0.001,0.0001 and 0.000 01) of four Omicron variants cultured in Vero cells were optimized by using cytopathic effect(CPE),viral nucleic acid copy number and viral titer as evaluation indexes.Results The optimum harvest time of the four Omicron variants BA.1,BA.1.1,BA.2 and BA.5 in Vero cells was 72 h,and the optimum MOI was 0.001～0.000 01,0.001～0.000 01,0.01～0.000 01 and 0.01～0.000 01,respectively.Conclusion The culture conditions of four Omicron variants in Vero cells were optimized,which laid a foundation of the development of SARS-CoV-2 Omicron variant inactivated vaccine based on Vero cells.

Bronchopulmonary dysplasia is one of the most common chronic respiratory diseases in premature infants, especially in very low birth weight infants.Lung immaturity, inflammatory injury, oxidative stress and abnormal repair after injury are the important factors.Leukotriene is an inflammatory mediator of 5-lipoxygenase pathway and participates in the occurrence of bronchopulmonary dysplasia.Montelukast, as a leukotriene receptor antagonist, may play a role in the treatment of bronchopulmonary dysplasia through anti-inflammation, anti-oxidation and anti-fibrosis.This article will review the potential mechanism and related clinical researches of montelukast which is used in treating bronchopulmonary dysplasia.

Objective To observe the effects of dexmedetomidine on serum TNF-αand IL-6 in neurosurgical patients during perioperative period. Methods 60 cases patients with intracranial aneurysm treated in our hospital in January 2014 to August 2014 were selected as the research objects, and they were randomly divided into two groups with 30 cases in each group.Before induction, the observation group adopted 1μg/kg dexmedetomidine with 10 min infusion, then adopted 0.4μg/( kg? h) infusion of dexmedetomidine, and control group received saline infusion.Serum TNF-αand IL-6 levels in two groups were compared at different time.Results After application of dexmedetomidine, the related indexes of hemodynamics in observation group, mean arterial pressure (MAP) and heart rate (HR) were more stable (P<0.05).Serum levels of TNF-αat the time of after induction, skin incision operation, 1h operation in observation group were (1.32 ±0.35), (1.42 ±0.54), (1.52 ±0.67), (1.57 ±0.63) μg/L, and were lower than those of control group, respectively (P<0.05).Serum levels of IL-6 at the time of after induction, skin incision operation, 1h operation in observation group were (69.64 ±13.54), (72.43 ±16.75), (76.32 ±16.93), (77.42 ±15.75) μg/L and were lower than those of control group, respectively (P<0.05).Conclusion The hemodynamics after application of dexmedetomidine in patients with neurosurgery operation is more stable, and the serum TNF-αand IL-6 are lower, so it contributes to the anti-inflammatory and has important clinical value.

Objective To investigate the effect of empowerment education on self-management in patients with diabetes mellitus. Methods A total of 128 patients with diabetes mellitus who met the criteria of WHO in 1999 were selected and divided into the control group(62 cases)and the observation group(66 cases). The control group accepted the traditional nursing methods, and the observation group accepted the empowerment education model. FBG, PBG, HbA1c and Diabetes Management Self-efficacy Scale (C-DMSES) were compared between two groups of patients after 3 months and 6 months. Results After the intervention with the empowerment education model, the patient′s FBG, PBG, HBA1c of the control group were (7.69±4.21) mmol/L, (11.78±3.21) mmol/L, (7.95±1.46)%three months after discharge, and (7.21 ± 3.19) mmol/L, (10.48 ± 4.65) mmol/L, (9.15 ± 2.36)% six months after discharge; while in the observation group, FBG, PBG, HBA1c were (6.23 ± 3.59) mmol/L,(9.32 ± 4.06) mmol/L, (6.69 ± 1.10)%three months after discharge, and (6.15 ± 1.89) mmol/L,(7.33 ± 2.10) mmol/L,(6.02 ± 2.17)%. The differences between two groups were significant (t=2.012-5.196, P<0.05). C-DMSES scores of the control group were 103.48 ± 18.41, 134.38 ± 13.01 on admission and six months after discharge, while in the observation they were 102.83 ± 10.91,157.64 ± 19.56. The differences between two groups were significant (t=3.151, P<0.05). Conclusions Empowerment education model can improve the ability of self-management of diabetes patients, improve self-efficacy to improve their own ability to control blood glucose.

OBJECTIVE:To observe the cerebral protective effects of dexmedetomidine in brain aneurysm surgery. METH-ODS:48 patients with intracranial aneurysm were randomly divided into observation group and control group,with 24 cases in each group. Observation group was given dexmedetomidine 1 μg/kg,pump time 10 min,at rate of 0.5 μg/kg;control group re-ceived constant volume of normal saline. Hemodynamic changes,the levels of S100β protein and neuron specific enolase (NSE) were compared between 2 groups. RESULTS:The heart rate and mean arterial blood pressure were more stable in the observation group after medication,with statistical significance(P<0.05). The serum level of S100β protein at the end of operation(T5),6 h after operation(T6),12 h after operation(T7),24 h after operation(T8)were(1.52±0.35)μg/L,(1.69±0.33)μg/L,(1.72±0.42)μg/L,(2.08±0.57)μg/L;the serum level of NSE were(10.9±1.2)ng/L,(13.5±1.5)ng/L,(16.8±2.8)ng/L and(19.7±4.3)ng/L in observation group;those were all lower than in control group,with statistical significance(P<0.05). CONCLUSIONS:Dexme-detomidine for cerebral aneurysm operation is helpful for hemodynamics stability,and result in lower S100β protein and NSE. So it is important for cerebral protection.

Myopia is one of the three main school public health problems in China, the prevalence of which has been showing a rising and low-aging tendency in the past few decades. High myopia can cause several vision -threatening problems such as degenerative retinal conditions, cataracts, retinal detachment, and choroidal neovascularization. Its related complications are the leading causes of visual impairment and blindness, adversely impacting the afflicted individual's quality of life. Therefore, the prevention and control of myopia have become a common concern of family, school and health department. The purpose of this review is to summarize the progression of a variety of intervention methods used to prevent and control childhood myopia in recent years.

ObjectiveTo investigate the relationship between gastrc schistosomiasis and gastrc cancer.MethodsThe data of 11 cases of gastrc schistosomiasis were retrospective analyzed.Results 54.5％ (6/11) of gastrc schistosomiasis cases complicated with gastrc cancer,and 83.3％ (5/6) was well-differentiated and moderately differentiated.Seen around the parasite eggs were obvious intestinal metaplasia,glandhyperplasia,abnormalepitheliallesionsandother seriousatypicalhyperplasia.ConclusionsGastric schistosomiasis significantly increases the risk of gastrc cancer.Gnstrc schistosomiasis does not have specific symptoms,and it is clinically sumilar to chronic gastrtis.Therefore,patients with chronic gastrtis-likesymptoms in the schistosomiasis endemic areas should be subjected to an intensive test for gastrc schistosomiasis in the biopsy specimens collected from pyloric antrum and gastric lesser curvature.Patients infected by gastric schistosomiasis are strongly suggested to go regularly for gastric cancer check with gastroscopy.

BACKGROUND: Nitric oxide (NO) can influence glucose transportation. Although its signal transmission pathway is not certain, it has been confirmed that the pathway is different from insulin. OBJECTIVE: To explore NO signal transmission pathway and the regulatory mechanism for the glucose uptake of skeletal muscle during exercise. RETRIEVAL STRATEGY: Using the keywords of "nitric oxide, signal, glucose", we searched the Pubmed database for the relevant articles about the transmission pathway and its regulation of glucose uptake in skeletal muscle published from January 1996 to November 2007. Meanwhile, the related foreign language books were retrieved manually from national library. Articles about the regulation of NO to muscular blood flow, signal transmission and glucose under exercise stress in human and gnawer were selected. Pathologically related basic studies were excluded. LITERATURE EVALUATION: Sixty related literatures (books) were collected, and 30 were accorded with the inclusive criteria, of which 5 were review articles, 23 were basic researches and 2 were related books. Meanwhile, 20 articles were related to the effects of NO on blood flow regulation and vasodilation, 4 articles and 2 books were related to signal transduction and 4 were about its signaling effect during exercise. DATA SYNTHESIS: NO is a signal molecule. It can mediate various biological phenomenon and displays strong vasodilation effect. The production of NO is increased in vivo during exercise, and NO can stimulate glucose uptake in skeletal muscle through its transduction. CONCLUSION: The generation of NO during exercise has positive effect on glucose uptake in skeletal muscle. The contraction and glucose uptake are closely correlated to the generation and transmission of NO, but the mechanism is still unclear.

OBJECTIVE: To describe and analyze the clinical characteristics of nasopharyngeal teratoma in infants and improve the levels of diagnosis and treatment to reduce misdiagnosis. METHOD: The clinical data of 11 cases of nasopharyngeal teratoma in infants were reviewed retrospectively and summarized the clinical features. After the preoperative examination of nasopharyngeal endoscopy and imaging (CT or MRI), all patients were under general anesthesia of nasopharyngeal teratoma surgical resection. Of them, 8 cases were used radiofrequency ablation, 3 cases used conventional power systems. RESULT: Eleven cases with neoformation were completely removed, the operation time was 5-15 min, blood loss was 1-5 ml, patients had no significant nasal obstruction, bleeding, eating nasopharyngeal regurgitation, breathing difficulties or other complications. No recurrence was found after 10 months to 9 years followed up. CONCLUSION The nasopharyngeal mass must be kept in mind in the differential diagnosis of breathing difficulties in infants, especially when it exists together with upper airway obstruction symptoms; The low-temperature radiofrequency ablation with endoscopic had the advantages of short time, precise control, less bleeding, clear operative field, little injury and pain, low recurrence, providing a new clinical treatments.
Catheter Ablation ; Child ; Child, Preschool ; Endoscopy ; Humans ; Infant ; Nasal Obstruction ; Nasopharyngeal Neoplasms ; surgery ; Nasopharynx ; pathology ; Neoplasm Recurrence, Local ; Retrospective Studies ; Teratoma ; surgery

A bolus injection of endotoxin and platelet activating factor ( PAF ) via external jugular vein in rats resulted in severe pulmonary edema, accompanied by significant increase in extravascular lung water volume, bronchoalveolar lavage fluid ( BALF ) protein concentration, BALF cell counts and polymorphonuclearcyte percentage. PAF receptor antagonist SRI63-441 showed partial protective effects on endotoxin and PAF induced lung edema and BALF cytological changes.