ObjectiveTo observe the effects of basic fibroblast growth factor (bFGF) on growth period of cultured bovine retinal pigment epithelium cells in different durations.MethodsDifferent proportion of phase with 4 ng/ml bFGF were measured by Flow Cytometry (FCM) assay.ResultsbFGF increased the RPE cells' proportion of phase S and decreased the proportion of phase G0-G1. ConclusionbFGF can stimulate RPE cells from phase G1 to phase S.

Humans ; Integrative Medicine ; Lupus Vasculitis, Central Nervous System ; therapy

The methods for aptamer selection have been modified and developed in recent years. Selection efficiency has been increased due to the improvement in separation of bound and unbound nucleic acids; applicability of aptamers has been improved due to the development of primer-free SELEX and the utilization of short oligonucleotide library; more research requirements have been satisfied due to the functional modifications of aptamer selection methods. All the methodological advances enhance the potential value of aptamers in basic researches and clinical applications.

Objective To evaluate the effects of curcumin pretreatment on the expression of Nrf2 protein during ventilator-induced lung injury in rabbits.Methods Twenty-four healthy male New Zealand white rabbits,aged 3-6 months,weighing 2.5-3.0 kg,were randomized into 3 groups (n =8 each) using a random number table:two-lung ventilation (TLV) group; one-lung ventilation (OLV) group; and curcumin pretreatment group (group Cur).In group Cur,curcumin 40 mg/kg (dissolved in 2 ml of 1％ sodium carboxymethylcellulose) was given via a gastric tube into the stomach twice a day for 7 consecutive days starting from 7 days before ventilation,while the equal volume of sodium carboxymethylcellulose was given via a gastric tube instead of curcumin in TLV and OLV groups.All the rabbits were tracheostomized,and a tracheal tube was inserted to perform TLV in TLV group,and a tracheal tube was inserted into the right bronchus to establish OLV in OLV and Cur groups.Volumecontrolled ventilation was used in the three groups and the ventilatory parameters were regulated to maintain SpO2 ＞ 90 ％.Immediately before beginning of ventilation (T0) and at 1,2 and 3 h of ventilation (T1-3),arterial blood samples were obtained for blood gas analysis and determination of PaO2.The oxygenation index was calculated.At the end of ventilation,the rabbits were sacrificed and right lungs were removed for determination of wet/dry lung weight ratio (W/D ratio).The right lower lobe was isolated and puhmonary specimens were obtained for determination of malondialdehyde (MDA) content and superoxide dismutase (SOD) activity (using colorimetric method) and the expression of Nrf2 and HO-1 protein (by Western blot) in lung tissues and for microscopic examination of pathological changes of the lung which were scored.Results Compared with group TLV,the W/D ratio,pathological scores,MDA content,and expression of Nrf2 and HO-1 were significantly increased,and the SOD activity and oxygenation index at T2,3 were decreased in OLV and Cur groups (P ＜ 0.05).Compared with group OLV,the W/D ratio,pathological scores,and MDA content were significantly decreased,and the SOD activity,oxygenation index at T3,and expression of Nrf2 and HO-1 were increased in group Cur (P ＜ 0.05).Conclusion Curcumin pretreatment reduces ventilator-induced lung injury through promoting the expression of Nrf2 protein in lung tissues in rabbits.

Objective To carry out the current status of internal quality control by statistical analysis of the Internal Quality Control (IQC)data of homocysteine in 2014 March.Methods Web-based External Quality Assessment (EQA)system was used to collect IQC data of homocysteine from 292 EQA participant laboratories nationwide.The data include thecoefficient of variation (CV)of IQC data under control in March 2014 and long-term cumulative data.Acceptable rates of CVs of two-lot internal quality controls in homocysteine were calculated according to 5 criteria,that were 1/3TEa,1/4TEa and the speci-fications based on biological variation including the minimal,appropriate and optimal allowable imprecision.The instrument the participant laboratories used were sorted into 6 groups and the passing rate of each group were calculated by the 5 crite-ria.Results 292 laboratories reported the data of level 1 IQC for homocysteine,106 of which reported the data of level 2 IQC.The passing rate was different according to different criteria.The passing rate had few difference by the criteria of 1/3TEa and the minimal allowable imprecision based on biological variation,which were from 63.36% to 76.42%.It was also true for 1/4TEa and the appropriate allowable imprecision based on biological variation,which were from 34.25% to 57.55. The passing rate was only 10.62%~16.98% by the criteria of appropriate allowable imprecision based on biological varia-tion.Statistical results showed that instruments the participant mainly used were HITACHI (77/292),Olympus (61/292), Roche (19/292),Beckman (14/292),Abbott (10/292)and Simens (10/292).The passing rates of all the instrument group had few difference except Simens group.Conclusion Most of the laboratories could meet the criteria of 1/3TEa and the min-imal allowable imprecision based on biological variation.But less than half of the laboratories could meet the criteria of 1/4TEa and the appropriate and optimal allowable imprecision based on biological variation.The precision performance of ho-mocysteine among laboratories needs further improvement.

Objective Discussthe reference intervals and their sources of lymphocyte subsets by flow cytometry tests by all Chinese clinical laboratories at 2014 with a comparison of difference between different test systems.Methods Questionnaires about reference intervals were distributed to 212 clinical laboratories participating in October 2014 national external quality assessment scheme of lymphocyte subsets by flow cytometry tests of National Center for Clinical Laboratory.Relevant information about reference intervals of 5 relative counting items CD3 + (％),CD3 + CD4 + (％),CD3 + CD8 + (％),CD3-CD16 + CD56 + (％) and CD3-CD19 + (％) was collected by a internet-based external quality assessment software systems.Microsoft Excel 2010 and SPSS 19.0 were used to sort out raw data,eliminate unreasonable or incorrect data,and only analyze source distribution,arithmetic average,median,minimum value,maximum value and percentiles (P2.5 and P97.5) of upper and lower limits about healthy adults' reference intervals.Laboratories derived from the highest percentage of source distribution whose reagent and instrument were matching with each other were grouped according to the test systems used and the differences of reference intervals between different systems were compared with Mann-Whitney test.Results For five items collected,in the clinical laboratories who accepted statistical analysis,respectively 39.32％ (81/ 206),37.44％ (79/211),37.68％ (78/207),37.11％ (72/194),36.98％ (71/192) of them had verified the reference intervals they used.The top three sources of reference intervals were instructions of reagent and instrument manufactures (49.70％-52.54％),calculations by laboratories themselves (18.64％-20.00％),and calculations by other laboratories (14.12％-15.43％).The arithmetic averages and medians of upper and lower limits about every item were relatively close.But the minimum and maximum values of upper and lower limits of certain items had moderate differences.As Mann-Whitney test later showed,all items with the P values of upper and lower limits between different test systems,except for the lower limit of CD3 + CD4 + (％) (P value is 0.052) and the upper limit of CD3-CD19 + (％) (P value is 0.117),were lower than 0.05 which meant an existing statistical difference.Conclusions The sources of lymphocyte subsets by flow cytometry tests in all Chinese clinical laboratories were different and the instructions of reagent and instrument had the highest percentage,but the reference intervals among differenttest systems had statistically significance.

Objective To explore the curative efficacy of astragalus injection on blood lipids and bone mineral density in patients with hemiplegia after ischemic stroke. Methods From January, 2014 to June, 2015, 116 patients with hemiplegia after ischemic stroke were col-lected and radomly divided into control group (n=54) and observation group (n=62). The control group received acupuncture based on con-ventional treatments, while the observation group received astragalus injection in addition. National Institutes of Health Stroke Scale (NI-HSS) and Ability of Daily Living Scale (ADL) were used to assess the neurologic impairment and the ability of daily living. The curative ef-ficacy and the levels of blood lipids and bone mineral density were observed. Results Compared with the control group, the curative efficien-cy increased (χ2=3.960, P<0.05). The score of NIHSS decreased (t=3.490, P=0.001), and the score of ADL increased (t=2.820, P=0.006). The levels of total cholesterol, triglyceride, low density lipoprotein cholesterol significantly decreased (t>4.190, P<0.001), however, the lev-el of high density lipoprotein cholesterol did not change (P>0.05). The densities in forearm, femur and Ward's area in the hemiplegia side in-creased (t>2.060, P<0.05). Conclusion Astragalus injection is effective on hemiplegia after ischemic stroke, which can increase the curative efficacy, alleviate the neurologic impairment, promote the ability of daily living, improve the blood lipids and increase the bone mineral den-sity.

The composition of volatile compounds of soils and that of soil bacterial metabolites were identified by using the SPME-GC/MS method. Results showed that some compounds, trimethylamine, 3-methyl-2-pentanoe, dimethyl disulfide, methyl pyrazine, 2,5-dimethyl-pyrazine, benzaldehyde, N,N-dimethyloctylamine and nonadecane, subsisted commonly in soils and soil bacterial metabolites with strong fungistatic activity. These compounds may be the key antifungal factors in soil fungistasis, especially soil volatile fungistasis. Otherwise, the method used in this study was a good tool for further study of soil volatle fungistasis.

Objective To investigate and analyze the current situation of reference intervals and decision limits of reticulocyte count in China.Methods The information related to upper/lower limits,decision limits,data resources,method principles, instruments and reagents of reticulocyte count in 2014 was collected via the external quality assessment software system based on website.The participants were divided according to their methods and instruments.The SPSS 1 9.0 was used for conducting the data analysis and statistics of results for each group.Results There were 276 laboratories submitting the val-id results.The major resources for reference intervals came from national guide to clinical laboratory procedures (53.99%), instructions of instrument manufacturers (16.30%),textbook (9.78%),instructions of reagents manufacturers (9.06%) and others.The major resources for decision limits were national guide to clinical laboratory procedures (56.06%),instruc-tions of instrument manufacturers (16.67%),textbook (7.58),instructions of reagents manufacturers (7.58%)and others. The medians and averages of upper/lower limits and decision limits among subgroups were close,whereas the P2.5 and P97.5 were significant discrepancies.Only 45.65% and 48.48% of participant laboratories had verified reference intervals and deci-sion limits before clinic use.The lower limits and decision limits among subgroups had nostatistical difference (P>0.05), where as the upper limits of different instrument groups had significant differences (P<0.001).Conclusion The current situation of reference intervals and decision limits of reticulocyte count is unsatisfactory.It is certain to establish a uniformed reference interval and decision limits for reticulocyte count,which provides a reference for the standardization of reticulocyte count testing.

Objective:To evaluate the efficacy of electroacupuncture(EA)in enhancing the recovery of gastrointestinal function after laparoscopic cholecystectomy(LC). Methods:Randomized controlled trials(RCTs)of EA treatment in the postoperative period of patients undergoing LC were searched.Studies were obtained from Excerpta Medica Database(EMBASE),PubMed,Cochrane Library,Wanfang Academic Journal Full-text Database(Wanfang),China National Knowledge Infrastructure(CNKI),China Biology Medicine Disc(CBM),and Chongqing VIP Database(CQVIP)from inception to December 10th,2022.RevMan 5.4.1 was used to perform the meta-analysis.The Cochrane tool was used to assess the risk of bias.Mean difference(MD)and confidence interval(CI)were used for statistical descriptions. Results:A total of 7 studies were included in the meta-analysis.The meta-analysis found that the EA group had a shorter time to the first flatus[P<0.001,MD=-5.32,95%CI(-6.42,-4.21)],bowel movement recovery[P<0.001,MD=-6.22,95%CI(-8.11,-4.34)],and the first defecation(P<0.001,MD=-11.08,95%CI(-15.78,-6.39)]than the control group. Conclusion:EA treatments can promote the recovery of gastrointestinal function after LC.