Objective To explore the detection rate and major risk factors of nodular thyroid diseases among adults.Methods A total of 35 495 adults who carried out health checkup during January 1st,2009 and December 31th,2010 in our center were assessed for the occurance of nodular thyroid diseases and the size and number of thyroid nodules by age and gender.Chi-square test,rank sum test and Chi-square trend test were used for data analysis.Results The total detection rate of nodular thyroid diseases was 33.87％ (female vs male:41.76％ vs 29.68％).The prevalence of single thyroid nodule was decreased with age,as opposed to multi-thyroid nodules.Single thyroid nodule was more commonly seen in males,which was reversed in multi-thyroid nodules.Small,middle and large thyroid nodules were found in 77.49％,18.19％ and 4.32％ males or 72.57％,21.59％ and 5.84％ females,respectively.Moreover,thyroid cancer was detected in 0.4‰ of those with nodular thyroid diseases.Conclusions The detection rate of nodular thyroid diseases among adult health checkup receivers was higher,which calls on the needs of intensive monitor and effective prevention of the condition.

Objective The aim of this study was to determine if isoflavone genistien has protective effects against high glucose-induced cell apoptosis in human aortic endlthelial cells,and investigate the possible mechanism for this protection.Methods Human aortic endothelial cells subjected to normal (5mmol/L) or high glucose (25mmol/L) were treated with genistein at 0,50,100nmol/L.Parallel experiments were performed with 100nM 17b-estradiol,and also in the presence and absence of the pure anti-estrogen ICI-182,780 (100nmol/L).The effects on cell apoptotic DNA fragmentation were determined using cell death ELISA,and the effects on cellular proliferation were determined using tritiated thymidine incorporation assay.Estrogen receptor expression was detected by Taqman quantitative PCR.Results Genistein at 100nmol/L significantly reduced high glucose-induced DNA fragmentation,and reversed cell DNA synthesis inhibition (P＜0.001) after 24 hours' incubation.The effect of genistein was completely blocked by ICI-182,780administration.Estrogen receptor beta,but not alpha was found to be expressed in these cells.Conclusion Isoflavone genistein shows protection against high glucose-induced cell damage through estrogen receptor beta,reducing apoptotic DNA damage and protecting from the inhibition of cell proliferation.

Background Researches showed that multifocal electroretinogram (mfERG) is able to assess the retinal function in the eyes with acute Vogt-Koyanagi-Harada ( VKH ) syndrome. But the mfERG characteristics of convalescence stage of VKH are still below clear. Objective Present study was to compare and follow up the variation process of visual acuity and mfERG in acute and recovery stages of VKH syndrome. Methods This was a clinic-based retrospective study. Visual acuity, mfERG and fundus fluorescence angiography ( FFA ) were recorded from 35 eyes of 18 acute VKH cases. The period of follow-up in recovery stage lasted about 18 months with the repetitive recording results for 4 times. Results In this study, the visual acuity range in acute stage VKH was 0. 01 to 1.0, and 91.4% (32/35 eyes) was below 0.6. Compared with normal control group, the visual acuity was significantly decreased (P＜0.01). The response densities (amplitudes) of N1 ,P1 waves of the first-order kernel were significantly lowed in all the 6 rings,and the implicit times of 1-4 rings of both waves were significantly prolonged in acute VKH eyes(P＜0. 05). The abnormalities of retinal function showed a regional difference at the posterior pole retina with the dominant change in the first ring,showing a cutting off78% in the P1 amplitude. The abnormal degree of mfERG was more serious as the the increase of retinal eccentricity. In 2 months of convalescence after glucocorticosteroids therapy,the range of visual acuity were 0. 1-1.2 ,and the amplitudes of N1, P1 of 1-2 rings were greatly elevated in comparison with acute on-set (P＜0. 05 ). However, there was still a remarkable difference in the amplitudes of from 1 through 6 rings,comparing with normal. The response density of P1 wave from whole recording region was only 44% of normal. Though the visual acuity was stable during the follow-up duration, a decreasing tendency in N1 and P1 amplitudes were seen. The implicit times of both wave shortened only in 1-3 rings in recovery stages of VKH (P＜0.05). Conclusion VKH syndrome cause serious damage of posterior retinal function.Macular region is the site with greater retinal functional lesion and restore before and after medication. This hardly recovery of retinal function can last over one and half year,even satisfied visual acuity is stable after proper treatment.

OBJECTIVETo explore biomechanical properties and stress-strain of mucosa scars after cleft palate surgery.

METHODSAfter the model of mucosa scars was made, the mucosa scars and normal mucosa were excised and examined immediately by tensionometry.

RESULTSThe mucosa scars after cleft palate surgery were compared with normal mucosa. The Poisson's ratio of mucosa scars and normal mucosa was 0.5 and 0.49, respectively, showing no significant difference between the two groups. The ultimate Young's modulus of mucosa scars was about 24.22 MPa, however, it declined to 3.32 Mpa in normal mucosa.

CONCLUSIONSThe mucosa scars after cleft palate surgery are biomechanically weaker than normal mucosa. It can be used for further research, such as maxillary orthognathic surgery, distraction osteogenesis, and orthodontic treatment.

Biomechanical Phenomena ; Cicatrix ; physiopathology ; Cleft Palate ; surgery ; Humans ; Mouth Mucosa ; physiopathology ; surgery ; Osteogenesis, Distraction ; Osteotomy, Le Fort

Objective:To explore CCR7 expression in splenic dendritic cells and its role in migration and activity of splenic dendritic cells in multiple organ dysfunction syndrome (MODS) in mice.Methods:The MODS model of mice was reproduced by Zymosan injection into peritoneal cavity.The mice were randomly divided into groups of normal,3-6 hours,24-48 hours and 10-12 days post zymosan injection.CD11c and CD205 were analysed by immunohistochemistry;The expression of CD86 and CCR7 of DCs were studied by the flow cytometry analysis.Results:In normal mice,many DC were found at the margin between the red and white pulp.In the 3-6 h and 24-48 h groups,CD86 and CCR7 were strongly up-regulated in the DC,and they distributed in T cells areas.In the 10-12 d group,DC distributed at the margin by the immature form.Conclusion:The CCR7 expression level of DC has close correlations with the migration of DC,CCR7 can be used to evaluate the migration and functional activity of DC in MODS.

Objective To evaluate the differentiation-inducing effect of phenylacetate on pancreatic carcinoma cells and underlying mechanism of RNA editing deaminase in cell proliferation and differentiation. Methods The effect of phenylacetate on cell proliferation and cell cycle were investigated in cultured pancreatic carcinoma BXPC-3 cell lines by methylthiazoletetrazolium( MTT) assay, and flow cytometry. The effect of phenylacetate on the expression of RNA editing deaminase (ADAR2 mRNA) in BXPC-3 cells and fresh pancreatic carcinoma specimen was evaluated by RT-PCR. Results ADAR1 mRNA expression was positive in human pancreatic carcinoma tissues and BXPC-3 cell lines. After application of 1.0 and 2.0 mmol/L phenylacetate for 24 h and 72 h, BXPC-3 cell growth inhibition rate increased, G0/G1 phase cells decreased, S phase cells increased, ADAR2 mRNA expression decreased ( P < 0.01 ). Conclusion ADAR2 mRNA played a vital role of regulation in the process of pancreatic carcinoma cells growth and differentiation. Phenylacetate could regulate the proliferation and differentiation of pancreatic carcinoma cells through the regulation of ADAR2 mRNA expression.

OBJECTIVETo establish an HPLC fingerprint to evaluate the quality of Polygalae Radix, root xylem, and those collected in different growth ages or harvest time.

METHODSeparation was performed at 30 °C on a Kromasil C18 column (4.6 mm x 250 mm, 5 μm); the mobile phases was acetonitrile and 0.05% H3PO4 water in the gradient elution; the flow rate was set at 1.0 mL · min(-1) and the detection wavelength at 314 nm; the quality discriminant analyses were accomplished by means of similarity analysis, cluster analysis, principal component analysis and neural network model.

RESULTIn 26 batches of Polygalae Radix, 24 batches fingerprint similarities were above 0.8. In 5 different growth or harvest time batches, 4 batches were above 0.8; in 8 batches root xylem samples, the similarities were all above 0.875. The similarity analysis was in accord with the quality discriminant analysis of cluster analysis, principal component analysis and neural network model.

CONCLUSIONFingerprint combined with chemical pattern recognition technique can effectively evaluate the quality of Polygalae Radix. The active substance species are all similar in cultivated, wild, different growth or harvest time Polygalae Radix and polygala root xylem, but the chromatography peak areas are different. The effective material contents are similar between wild and cultivated Polygalae Radix, but each chromatographic peak area of the root xylem is much smaller than that of Polygalae Radix. The chemical substance accumulation mainly depends on harvest month, but little growth time in Polygalae Radix.

Chromatography, High Pressure Liquid ; methods ; Drugs, Chinese Herbal ; chemistry ; Plant Roots ; chemistry ; classification ; Polygala ; chemistry ; classification ; Quality Control

Objective To analyze the epidemiological features and influencing factors of human brucellosis in Qinghai province,and to provide scientific basis for prevention and control of brucellosis.Methods From 2006 to 2010,select the high incidence areas of brucellosis in Qinghai province and five counties(Henan,Dari,Tianjun,Ping'an and Haiyan counties) included in the “Central Subsidies to Local Public Health Special Fund Human Brucellosis Prevention and Control Projects” for the survey point,as well as high-risk employees from Qinghai Biological Pharmaceutical Factory were investigated.Combined with epidemiological questionnaire investigation [done according to the “National Human Brucellosis Surveillance Program(Trial)”],clinical symptoms and signs,confirmed human brucellosis patient were tested by intradermal allergy test,rose bengal plate agglutination test(RBPT) and standard tube agglutination test (SAT),in accordance with “Diagnostic Criteria and Principles of Management of Brucellosis” (GB 15988-1995) and“Diagnostic Criteria for Brucellosis” (WS 269-2007).Results Of 8368 serum samples detected,347 were RBPT positive,and the positive rate was 4.15％;5346 serum samples were tested by SAT,180 were positive,and the positive rate was 3.37％.In June 2009,112 employees in Qinghai Biological Pharmaceutical Factory were investigated on a follow-up survey,83 were RBPT positive,the positive rate was 74.11％; 58 were SAT positive,the positive rate was 51.79％.Eight of them were new cases and 4 were chronic brucellosis.Twenty five new cases were reported between 2006 and 2010.The peak incidence was from March to July.Most of the cases were herdsmen.ConclusionStrengthening animal quarantine,strengthening public education,and improving protection awareness,can effectively control the disease brucellosis.

Background The pathological change of the anterior uveitis is the disruption of blood-aqueous barrier.Slit lamp examination appears to be limited for the evaluation of inflammatory response,and fluorescine angiography is an objective approach.However,there are few relative studies up to now in China.Objective Aim of this study was to observe the characteristics and assess the clinical applications of iris fluorescein angiography (IFA)in Chinese uveitis with brown iris.Methods Forty eyes of 40 normal subjects and 21 eyes of 13 patients with the anterior uveitis were collected in this study.IFA,slit-lamp examination and iris photograph were performed on the subjects.All individuals were informed consented at the initiation of this study.Results In normal eyes,fluorescence in iris vessels was blocked by the melanin pigment,but peripupillary weak fluorescent leakage was seen in the normal eyes with the age of ＞60 years old.The multiple patterns of fluorescence leakage were found in the patients suffered from uveitis of various etiologies although the negative slit-lamp finding,including the leakage of fluorescein around the pupillary margin and radial iris vessels in the eyes with mild diseases,transmitted fluorescence of regular iris vessels in the eyes with diffuse and local iris atrophy,and vascular tufts of the pupillary margin with coiled interwind tight clusters of thin vessels at the early phase in the eyes with dilated capillaries,microvascular anomalies and new vessel formation.The hyperfluorescence remained throughout the IFA duration.Conclusions IFA findings in uveitis vary depending on the topography,type and severity of inflammation.IFA has a good clinical applying value because of its objective assessment ability of the degree of the blood-aqueous barrier breakdown and iris neovascularization breakdown.It can exhibit the unvisible lesion under the slit-lamp and monitor the efficacy of medical theraphy in patients with active or quiescent uveitis.