Background Some researching results of sodium hyaluronate eye drops treating dry eye have been reported home and abroad.To evaluate these results using the method of evidence-based medicine (EBM) has an important clinical significance.Objective This secondary study was to systematically evaluate the efficacy of sodium hyaluronate eye drops for the treatment of dry eye.Methods Meta analysis was adopted in this study.The electronic bibliographic databases were searched according to the prescribed strategy,including Medline,PubMed,VIP,CBM,CNKI,Wanfang Data using the method of Cochrane systematic review.The literature published time was limited from the commencement of each database to December,2011.Randomized controlled trials (RCTs) of sodium hyaluronate eye drops treating dry eye were included and the methodological quality of the RCTs was assessed by two evaluators using Jadad measuring scale,and homogeneous evaluation by Meta-analysis was performed.Statistical analysis of clinical data was performed using RevMan 5.0 software provided by the Cochrane Collaboration.With odds ratio (OR) value as the effect index,the randomized effect model was used to analyze the clinical heterogeneity.Results A total of 4 RCTs involving 686 patients were included.Jadad scale evaluation showed 7 points in 2 literature,4 points in 1 literature and 2 points in 1 literature.In all the RCTs,344 patients with dry eye were treated using sodium hyaluronate as the sodium hyaluronate eye drops group,and 342 dry eyes applied placebo,normal saline solution,hydroxymethyl cellulose,hydroxypropyl methyl cellulose respectively as the control group.Meta-analysis indicated that the total effective rate (OR) was 2.55 with the 95％ confidence interval (CI) 0.94-6.93.The symptoms were improved in 183 cases in the experiment group and 130 cases in the control group.No significant difference was found in the OR between the sodium hyaluronate eye drops group and the control group (Z =1.84,P=0.07).Conclusions Meta-analysis indicates that sodium hyaluronate eye drops can improve the symptom of dry eye,but have no significence with the control group.However,owing to fewer number and uneven quality of included RCTs,the large sample size and multicenter of RCTs is still needed to verify the superiority of sodium hyaluronate eye drops for dry eye.

Abstract: Objective　To analyze the laboratory indexes of patients infected with malaria patients and COVID-19, so as to provide reliable evidence for the diagnosis of mixed infection of both. Methods　The routine clinical laboratory items such as routine blood, biochemistry and lymphocyte subsets were tested in three cases of COVID-19 complicated with falciparum malaria who admitted to Guangzhou Eighth People's Hospital Affiliated to Guangzhou Medical University from July to December 2020 were tested. Laboratory data were stage-wise analyzed in conjunction with changes in the course of disease. Results　Three patients confirmed COVID-19 infection recruited all had malaria infection history. Fever, headache, and other symptoms emerged on the 4rd to 11th day after admission. Malaria parasite was detected by malaria parasite antigen testing and blood smear testing, and all three patients had re-ignition of malaria after being confirmed COVID-19 infection. In the early stage of malaria relapse, lymphocytes decreased, CRP and SAA increased, and gradually returned to normal level after antimalarial treatment. Interestingly, we only found one patient at the initial stage of malaria detection showed PLT decreased, no other unnormal changes in other routine blood results (WBC, ESO) and liver function results (ALT, AST, GGT, TBIL, DBIL, CG) were found from the beginning to end course of the disease. Conclusion　COVID-19 infection may promote the resurgence of malaria, so the relapse of malaria should be monitored especially for the patient with malaria infection history who begin to develop fever and other symptoms a few days after the diagnosis of COVID-19. The inflammatory indicators would be worth able as an auxiliary judgment basis for the effective treatment of the two combined infection.

Objective To analyze the examination results of external quality assessment (EQA),at all levels of iodine deficiency disorders (IDD) network laboratories in Ningxia Province and to further standardize and improve the laboratory,and to provide a reliable laboratory quality assurance for surveillance and control of IDD.Methods The examination results of EQA at all levels of IDD laboratories in Ningxia Province were statistically analyzed in accordance with the National Reference Laboratory (NRL) of IDD (2002-2011).Results Laboratory hardware equipment and technology at all levels met the testing requirements,and qualified rate of quality control increased year by year.Both of the response rate and qualification rate of urine iodine laboratories at provincial level were 100％ in the past decade.From 2005 on,the response rate of city laboratories had been 100％,and the qualification rate had been 100％ since 2007.The response rate and qualification rate of salt iodine laboratories at both the provincial level and the city level were 100％ in the past decade.The response rate of salt iodine laboratories at county level had been 100％ since 2004,and the qualification rate had been 100％ since 2009.Salt iodine and urinary iodine levels were fully qualified for the past three years at provincial,municipal and county levels.Conclusions All levels of IDD network laboratory in Ningxia Province runs good,EQA is fully qualified,and is able to provide a reliable laboratory quality assurance for surveillance and control of IDD.

Objective To establish an experimental subarachnoid hemorrhage(SAH)model with endo- cerebrovascular peroration.Method The right external carotid artery of SD rats were isolated,leaving a stump of approximately 3 to 4 mm.A-3-O monofilament nylon suture was inserted up through the stump of external carotid artery to the internal carotid artery for about 18～19 mm.A small resistance was usually felt,and the suture was then advanced 2 mm further and the suture was immediately withdrawn.Two hours or two days after SAH induction,SAH extension was observed.Two days after SAH induction,the diameter of the basilar artery was measured.Results SAH extends from the ipsilateral artery to the eontralateral artery after SAH induction.The diameters of basilar arteries in SAH animals were smaller than those of control rats,indicating the present of cerebrovascular spasm in SAH animals.Conclusions The endo-cerebrovascular perforation technique for establishing a non-craniotomy SAH model is reliable.

The design principles of a noninvasive ventilator's turbine are studied and discussed in this paper. The design is completed from its several aspects and in combination of related theories, using SolidWorks tools. Abundant experimental results prove that this design's technical specifications meet all the requirements.
Equipment Design ; Respiration, Artificial ; instrumentation ; methods ; Ventilators, Mechanical

Objective To study the behavioral changes of the spinal cord injury model to provide important data for neuroal factor therapy of the impaired spinal cord.Methods In SD rat,aged 8 weeks,(T7~T8 spinous processes as control),after the spinous process and corresponding lamina of vertebra were removed,the spinal cord was cut by using scissors to prepare the complete transversal abruptly spinal model.The behavioral score of the rat was recorded at different time.The evaluation was made in imageology and pathology.Results The score of SD rat in the experiment group was higher than the control group at different control time.The pathobiology and imageology alterations were very apparent in the damaged spinal area.Conclusion GAP-43 has neuroprotective effect on the recovery of spinal cord injury.

OBJECTIVETo explore the feasibility of membrane protein-based two-dimensional electrophoresis (2-DE) in the investigations of chondrocyte-related diseases and its complementarity with total protein-based 2-DE.

METHODSKnee cartilage samples were obtained to isolate the chondrocytes with type II collagenase/hyaluronidase digestion. The membrane proteins and total proteins were extracted and loaded separately onto PH3.0-10.0 non-linear gel strip for 2-DE analysis. The qualities of membrane protein-based 2-DE gels were evaluated, and the difference between the distribution profiles of the membrane protein spots and that of the total protein were observed and their complementarities were evaluated.

RESULTSMembrane protein-based 2-DE generated high-quality gel images, and on each gel 412.3±13.5 protein spots were identified. These spots were distributed in the region of isoelectric point pH 5.0-9.0. In the gel images generated by the total proteins, 564.3±5.9 protein spots were identified in each image, and the spots were distributed in the region of isoelectric point pH 3.0-7.0.

CONCLUSIONMembrane protein-based 2-DE of the chondrocytes can generate high-quality gel images, and the isoelectric distribution of the protein spots is complementary to that of total protein, which provides valuable information for chondrocyte-related diseases.

Adult ; Chondrocytes ; chemistry ; Electrophoresis, Gel, Two-Dimensional ; methods ; Female ; Humans ; Isoelectric Point ; Male ; Membrane Proteins ; isolation & purification ; Middle Aged

Chloroplast genetic engineering, offers several advantages over nuclear transformation, including high level of gene expression, increased biosafety, remedying some limitations associated with nuclear genetic transformation, such as gene silencing and the stability of transformed genes. It is now regarded as an attractive new transgenic technique and further development of biotechnology in agriculture. In this article we reviewed the characteristics, applications of chloroplast genetic engineering and its promising prospects were discussed.
Biotechnology ; methods ; Chloroplasts ; genetics ; Genetic Engineering ; methods ; Plants, Genetically Modified ; genetics ; Transformation, Genetic