AlM: To investigate the refractive status of the preschool children in Xiantao, Hubei Province in order to find out the abnormal refraction error beyond the physiological range.
METHODS: ln this cross - sectional study, we investigated preschool children in kindergartens and the scattered ones were 12 716 ( 25 432 eyes ) ranging from 6mo ~ 6 years old. 1 581 children ( 3 162 eyes ) were diagnosed ametropia by Suresight refractive screening instrument, which were confirmed again after mydriasis optometry.
RESULTS: The incidence rate of ametropia in preschool children in Xiantao was 12. 4%, and statistics showed no significant difference between boys and girls (P>0. 05), but had differences of morbility rate among each age group (P<0. 05). With age increasing morbility rate of the refractive error decreased. The simple hyperopia and the compound hyperopia astigmatism were dominant in all refraction error. Professional ophthalmologists diagnosed amblyopia in 261 children (522 eyes), which was 16. 5%, among 1581 abnormal refractive children (3 162 eyes) screened out by Suresight refractive screening instrument.
CONCLUSlON: The incidence rate of ametropia decreases with age increasing in the preschool children from 6mo~6 years old, which imply preschool children should have mydriasis optometry in order to find out amblyopia and other congenital eye disease.

Objective To study the effects of imatinib mesylate on the apoptosis in human melanoma cell line M14.Methods M14 cells were cultured in vitro in the presence of imatinib mesylate at three concentrations(5,10 and 20 μmol/L)for 96 hours.Sebsequeutly,annexin V-FITC and propidium iodide(PI)double staining flow cytometry and terminal deoxvnucleotidvl transferase (TdT)-mediated dUTP nick end labeling (TUNEL)were used to detect the cell cycle and apoptosis,respectively,DAPI staining to observe the mot-phological changes.and Western blot to measure the protein expressions of bcl-2 and bax in cells.Results Imatinib mesylate of the three concentrations could induce an evident increase in the apoptosis in M14 cells.Compared with untreated M14 cells,an increase of cell population in S phase was observed in imatinib mesylate.treated cells(P<0.05),along with a decline in cell population in G2/M phases(P<0.01).Annexin V/PI double staining and TUNEL revealed a significant increase in the rate of early apoptosis and in the acount of apoptotic cells,respectively,in M14 cells treated with imatinib mesylate of the three concentrations(all P<0.01).After treated with imatinib mesylate of 20 μmol/L.there was a morphological change characteristic of apoptosis in M14 cells,together with an upregulated expression of bcl-2(t=15.46,P<0.01)and downregu-lated expression of bax(t=25.53,P<0.01).Conclusions Imatinib mesylate can interfere with the process of cell cycle of and induce the apoptosis in M14 cells,which may be mediated through mitochondrial pathway.

Objective To explore the regulation of ROS level and ROS-triggered downstream events on SK-N-MC Ewing sarcoma cells upon apoptasis induction by 2-Methoxyestradiol (2-ME). Methods To detect the reversibility of apoptosis and the alternation of activity of respiratory chain, mitechondria transmembrane potential (△ψm), and cellular ROS level and to explore their association with flow cytometry, clark oxygen electronic node analysis, drug-removal design, and permeability transition (PT) pore stablizing agent. Results SK-N-MC cells were induced to ROS-dependent apoptosis. Apoptosis occured irreversibly after2-ME treatment for 3 h. Upon 2-ME treatment, the activity of respiratory chain was inhibited and the ROS generation was accelerated; the △ψm underwent the increasing within 3h but decreasing after 3h which could be reversed by PT pore stablizing; the ROS level underwent the continuous increasing and PT pore stablizing had no obvious effect on it. Conclusion 2-ME causes the acceleration of ROS generation via inhibiting the activity of respiratory chain and elevating the level of △ψm. ROS plays a signaling role and when total ROS accumulate to a threshold, the PT pore opening and the collapse of △ψm could be induced irreversibly and cell is eventually introduced to death.

Objective To explore the effects of HINT1 on the proliferation and apoptosis of human melanoma cell line A375.Methods Three cell clones were used in the experiment.including A375 cells that were previously transfected with eukaryotic expressing vector pcDNA.3.1/myc-His(-)A-HINT1 and highly expressed HINTI(HINT1-A375),A375 cells transfected with pcDNA.3.1/myc-His(-)A empty vector(neo-A375)and untransfected A375 cells.M3T assay,flow cytometry and terminal deoxynucleotjdyl transferase (TdT)-mediated dUTP nick end labeling(TUNEL)were performed to detect the proliferation,cell cycle and apoptosis of the three kinds of cells,respectively.The relative activity of Caspase 3,8 and 9 was measured by spectrophotometry,and the protein expression of Bcl-2,Bax,Cytoehrome C and p53 by Western blot. Results Compared with neo-A375 and untransfected A375 cells,HINT1-A375 cells grew more slowly(P<0.05)with an increase in G1-phase population(73.17%±3.99%,F=25.65,P<0.05).a decrease in S-phase population(16.75%±1.62%,F=75.48,P<0.01),and a pronounced late apoptosis(23.57%±9.58%,F=11.71,P<0.01).A significant increase was also observed in the percentage of apoptotic cells(12%±1%,F=358.02,P<0.01)as well as in the relative activity of Caspase 9(0.45±0.03,F=135.62,P<0.01)and Caspase 3(0.46±0.04,F=90.28,P<0.01)in HINT1-A375 cells compared with the other two kinds of cells.Western blot showed upregulated expressions of Bax,Cytochrome C and p53 but downregulated expres-sion of Bel-2 in HINT1-A375 cells.Conclusions The overexpression of HINT1 could inhibit the proliferation and promote the apoptosis of A375 cells with cell cycle arrest in G1 phase,hinting that HINT1 may be a tumor suppressor gene in human melanoma.

Objective To evaluate the clinical efficacy of transurethral resection of ureteral orifice invaded by advanced prostate cancer caused hydronephrosis. Methods A retrospective study was done in 15 patients who were diagnosed by advanced prostate cancer with invasion of ureteral orifice and treated by transurethral resection of ureteral orifice and maximal androgen blockade. 24 kidneys were diagnosed as hydronephrosis by ultrasound. Before the procedure, the average serum BUN was 13.2 mmol/L (8.9~28.5), the average serum Cr was 243.3 μmol/L (126.7~369.2), the average GFR evaluated by renal radionuclide imaging was 48.6 mL/min (31.1~66.2), and the upper urinary tract was obstructed in kidneys with hydronephrosis. Results All 15 patients underwent successfully transurethral resection of ureteral orifice and discharged after 4 days stay. The average procedure time was 65 min (50~100 min) and mean blood loss was 45 mL (30~65 mL) . The patients were followed up for 2~4 weeks. Hydronephrosis examined by ultrasound was ameliorated in 18 kidneys (75%) and not obviously changed in 6 kidneys (25%) in one week after procedure. Hydronephrosis examined by ultrasound was ameliorated in 20 kidneys (83.3%) and not obviously changed in 4 kidneys (16.7%) in two weeks after procedure. Within two weeks after procedure,the average serum BUN was 10.75 mmol/L (6.6~21.30 mmol/L), the average serum Cr was 187.3μmol/L (97.5~286.6 μmol/L), the average GFR evaluated by renal radionuclide imaging was 58.1 mL/min (37.8~79.2 mL/min),and upper urinary tract was unobstructed. Conclusion Upper urinary tract obstruction and renal function were ameliorated and improved in a short time by transurethral resection of ureteral orifice invaded by advanced prostate cancer which caused hydronephrosis.

Aim To investigate the effect of asiatic acid on apoptosis and autophagy in human glioblastoma T98G cells. Methods MTT colorimetry was employed to assay the cellular proliferating activity. The fluores-cence microscope and Hoechst 33258 staining were used to detect the morphological changes. The cell ap-optosis and autophagy were analyzed by flow cytometry with Annexin-V/7-AAD and MDC staining respective-ly. The expressions of associated proteins were detected by Western blot to analyze the mechanism of apoptosis and autophagy. Results MTT assay showed that the growth of T 9 8 G cells was inhibited by asiatic acid ( IC50 =46. 3 μmol · L-1 ) . Annexin V/7-AAD stai-ning and Western blot revealed that asiatic acid in-duced apoptosis in T98 G cells by reducing the expres-sion of Akt, decreasing the mitochondrial membrane potential, and increasing the expression of Caspase-3. MDC staining and Western blot showed that the per-centage of MDC-positive cells was decreased and the expressions of Beclin-1 , LC3-II and Atgs were inhibi-ted by asiatic acid treatment. 5 μmol·L-1 chloroquine was used to up-regulate the expressions of LC3-Ⅱand Beclin-1 . Asiatic acid-inhibited autophagy was blocked and the total apoptotic rate was reduced remarkably. Conclusion Asiatic acid suppresses T98 G cells pro-liferation by inducing apoptosis and inhibiting cell au-tophagy, and the very role of inhibiting autophagy could promote apoptosis to a certain extent.

OBJECTIVETo investigate the risk factors associated with metastasis of lymph node along superior mesenteric vein (No.14v) in gastric cancer.

METHODSClinicopathological data of 70 gastric cancer patients undergoing gastrectomy with No.14v dissection between September 2010 and October 2011 in the Gulou Hospital, Nanjing University School of Medicine were analyzed retrospectively. Associated factors of No.14v lymph nodes metastasis were investigated.

RESULTSOf 70 cases, positive No.14v lymph node metastasis was found in 8 cases (11.4%). Univariate analysis showed that the No.14v metastasis was associated with tumor location (P=0.019), tumor size (P=0.004), depth of invasion (P=0.001), TNM staging (P=0.006), and other lymph node group metastasis (all P<0.05), and was not associated with age, gender, Borrmann classification, Lauren classification or histological type (all P>0.05). Multivariate analysis revealed that lntra-pyloric lymph nodes (No.6) metastasis was an independent risk factor of No.14v metastasis (P<0.05). The predictive accuracy was 94.3% (66/70) and false-negative rate was 1.7% (1/60) for No.6 lymph node metastasis.

CONCLUSIONNo.6 lymph node metastasis status can predict the metastasis of No.14v more accurately.

Gastrectomy ; Humans ; Lymph Node Excision ; Lymph Nodes ; Lymphatic Metastasis ; Mesenteric Veins ; pathology ; Neoplasm Staging ; Retrospective Studies ; Risk Factors ; Stomach Neoplasms ; pathology ; surgery

Objective: To analyze the disease burden and risk factors of colorectal cancer in Zhejiang Province from 1990 to 2019, so as to provide the basis for prevention and control of colorectal cancer. Methods: Based on data of 2019 Global Burden of Disease (GDB 2019), disease burden and risk factors of colorectal cancer in Zhejiang Province from 1990 to 2019 was assessed using years of life lost (YLL), years lived with disability (YLD), disability-adjusted life years (DALY). Results: In 2019, the YLL rate, YLD rate and DALY rate caused by colorectal cancer in Zhejiang Province were 496.15/105, 31.81/105 and 527.96/105, respectively. From 1990 to 2019, the YLL rate, YLD rate and DALY rate caused by colorectal cancer in Zhejiang Province increased by 114.90%, 482.60% and 123.38%, respectively, showing increasing trends (average annual percent change values were =2.663, 6.283 and 2.800, respectively,all P<0.05). From 1990 to 2019, the YLL rate, YLD rate and DALY rate in the age groups of 15 to 49 years, 50 to 69 years and 70 years and older showed increasing trends (all P<0.05). In 1990, the top ten risk factors for colorectal cancer in Zhejiang Province were diet low in calcium, diet low in milk, diet low in whole grains, smoking, alcohol use, low physical activity, high fasting plasma glucose, diet high in red meat, diet low in fiber and high body mass index. In 2019, the top ten risk factors for colorectal cancer in Zhejiang Province were diet low in milk, diet low in whole grains, diet low in calcium, alcohol use, diet high in red meat, high body mass index, high fasting plasma glucose, low physical activity, diet low in fiber and diet high in processed meat. Conclusions The disease burden of colorectal cancer in Zhejiang Province showed an upward trend from 1990 to 2019. The top ten risk factors for colorectal cancer remained between 1990 and 2019, while there was a slight change in ranking.

Objective To investigate the cerebral blood flow (CBF) perfusion patterns and related factors in hyperthyroidism patients.Methods Twenty-five patients with hyperthyroidism and twenty-two healthy controls matched for age,sex,education were enrolled.~(99)Tc~m-ethylene cysteinate dimer (ECD) SPECT CBF perfusion imaging was performed at rest.Statistical parametric mapping 5.0 software (SPM5) was used and a statistical threshold of P＜0.05 (corrected) was applied for signifying changes of regional CBF (rCBF).The semiquantitative values of rCBF were extracted automatically by brain search 1.1 software and were correlated with concentrations of serum thyroid hormones(FT_3,FT_4),thyroid autoimmune antibodies:sensitive thyroid stimulating hormone(sTSH),thyroid peroxidase antibody (TPOAb) and TSH receptor antibody (TRAb) by Pearson analysis,with disease duration by Spearman analysis.Results rCBF was decreased significantly in limbic system and frontal lobe,including parahippocampal gyrus,uncus (posterior entorhinal cortex,posterior parolfactory cortex,parahippocampal cortex,anterior cingulate,right inferior temporal gyrus),left hypothalamus and caudate nucleus (P＜0.05,corrected).rCBF in left lingual gyrus,posterior cingulated was negatively correlated with concentration of FT_3(r=-0.468,-0.417,both P＜0.05).rCBF in left lingual gyrus,bilateral inferior temporal gyrus,right superior parietal lobe was negatively correlated with concentration of FT_4(r=-0.4M,-0.418,-0.415,-0.459,all P＜0.05),while that in left mammillary body and putamen was positively correlated with concentration of FT_4(r=0.419,0.412,both P＜0.05).rCBF in left insula was negatively correlated with concentration of sTSH,and right auditory associated cortex was positively correlated with concentration of sTSH(r=-0.504,0.429,both P＜0.05).rCBF in left middle temporal gyrus,left angular gyrus was positively correlated with concentration of TRAb while that in right thalamus,right hypothalamus,left anterior nucleus,left ventralis nucleus was negatively correlated with concentration of TRAb(r=0.750,0.862,-0.691,-0.835,-0.713,-0.759,all P＜0.05).rCBF in right anterior cingulate,right cuneus,right rectus gyrus,right superior marginal gyrus was positively correlated with concentration of TPOAb(r=0.696,0.581,0.779,0.683,all P＜0.05).rCBF in postcentral gyrus,temporal gyrus,left superior marginal gyrus and auditory associated cortex was positively correlated with disease duration(r=0.502,0.457,0.524,0.440,all P＜0.05).Conclusion Hypoperfusions in limbic system and fontal lobe were found in hyperthyroidism Patients,which might be associated with thyroid function and disesse duration.

OBJECTIVETo investigate the relationship between gene polymorphism of CYP2E1, CYP1A1, IL-4 and susceptibility of medicamentosa-like dermatitis induced by trichloroethylene (TCE).

METHODS35 patients with medicamentosa-like dermatitis induced by TCE were chosen as the patient group, and 35 healthy workers as control group. The real-time quantitative polymerase chain reaction (PCR) with TaqMan minor groove binding (MGB) probes was used to test single nucleotide polymorphisms (SNP) of CYP2E1, CYP1A1 and IL-4 in the patients with medicamentosa-like dermatitis as well as in the control. The genotypes and the frequency of genotype or allele were compared between the patients and control with statistical analysis.

RESULTSThe frequency of allele G within CYP1A1 gene (rs1048943) was significantly higher in TCE patients (37.1%) than that in control (P<0.05); the frequency of allele T within CYP2E1-1053 C/T was significantly higher in TCE patients (41.4%) than that in control (P<0.01); the frequency of T/T within IL-4-588 C/T (rs2243250) was significantly higher in TCE patients (75.0%) than that in control (P<0.01), and the frequency of allele T within IL-4-588 C/T (rs2243250) was also significantly higher in TCE patients (87.5%) than that in control (P<0.01).

CONCLUSIONThe gene polymorphism of CYP2E1, CYP1A1, IL-4 is probably associated with hypersensitivity for the TCE patients with medicamentosa-like dermatitis, and could be one of the genetic factors related to the individual susceptibility to TCE exposure.

Cytochrome P-450 CYP1A1 ; genetics ; Cytochrome P-450 CYP2E1 ; genetics ; Dermatitis, Occupational ; genetics ; Genetic Predisposition to Disease ; Humans ; Interleukin-4 ; genetics ; Polymorphism, Single Nucleotide ; Trichloroethylene ; adverse effects