Objective To observe the mutifocal electroretinogram (mfERG) characteristics of rod and cone cells in patients with retinitis pigmentosa (RP) and to evaluate the function of photosensory cell.Methods The mfERG recording technique for rod cell in eight normal subjects (eight eyes) were established and the influence of different brightness lightstimulus in P1 wave amplitude were analyzed.The cone and rod cells mfERG of 38 eyes in 19 patients were recorded and then calculated positive ratio from local signal-noise ratio.The average visual acuity and P1 wave amplitude density of cone mtERG in different types were compared and statistically analyzed.Meanwhile,the changes in P1 wave amplitude of cone and rod mfERG in four quadrants also compared and analyzed.Results Rod cell mfERG in normal subjects can be recorded stably by using blue flashes with low light intensity as 0.04 cd/m~2.In patients with RP,the cone and rod cells mfERG can he detectd 65.790./00 and 10.51% respectively.P1 wave amplitude density in type I of cone cell mfERG was significantly higher than that in type Ⅱ (t=5.21,P=0.000).There were no differences in average visual acuity (t=1.15,P=0.612).P1 wave amplitude density in type Ⅰ was negatively related to IogMAR visual acuity (r=-0.48,P=0.04 ).The comparison of rod and cone cells mfERG in local wave characteristics showed that P_1 wave amplitude densities had spatial relationship in each area.Conclusions The results suggested highly variable central responses in cone cell in RP patients,higher positive recorded ratio in cone cell than rod cell and spatial correspondence between the function of reserved cone and rod cells.

Objective To investigate the effects of chondroitin sulfate proteoglycans (CSPGs) degradation induced by chondroitinase ABC (ChABC) on the rat flash visual evoked potential (F-VEP) around the end of the critical period of visual development.Methods A total of 30 Long Evans rats were randomly divided into 3 groups according to their age of 14,21 and 35 d.Then in each group,5 animals served as CSPGs degradation model induced by ChABC microinjection into 5 sites of the rat cortex [750 nL (48 U/ml) for 1 site,for 2 times at a 3-day interval],and the other 5 rats served as normal control and received normal saline microinjection.Immunofluorescence microscopy and laser scanning confocal microscopy were used to determine the establishment of animal model.F-VEPs were evaluated in 7 d after first microinjection.Results In the normal rats,the latency of F-VEP main wave became shorter with the increase of their age,the number was [(63.5?10.1),(50.8?6.4),(44.9?6.3) ms,P

Objective To investigate the value of integrated PET-CT with 18F-FDG in the diagnosis of non-small cell lung cancer.Methods 91 patients with non-small-cell lung cancer(NSCLC)and 10patients with benign disease underwent integrated PET-CT from February 2004 to May 2005.Other diagnostic procedures were analysed. Results 91 patients with lung cancer were found by positive SUV and pathologically confirmed.Of the 10 patients with benign disease.positive SUV were found in 3 cases.2 cases with tuberculosis and 1 case with inflammatory pseudotumor were confirmed.Negative SUV were found in 7cases.1 case was incorrectly diagnosed by integrated PET-CT.The sensitivity,specificity and accuracy of integrated PET-CT in the diagnosis of NSCLC were 100%,90%,99%,respectively.Forty-eight of 91patients with lung cancer underwent operation.There were 30 cases with and 18 cases without mediastinal nodal metastases.There were two false negative cases and one false positive case.The sensitivity,specificity and accuracy of integrated PET-CT in the diagnosis mediastinal nodal metastases were 93.3%,94.4%,93.8%.respectively.Metastases were identified in 33 cases.Conclusion Functional metabolism and anatomy imaging are fused in integrated PET-CT.The primary site and metastases lesion are correctly diagnosed by integrated PET-CT.The accuracy of integrated PET-CT in the diagnosis of NSCLC is over 90%.

Objective To investigate the diagnostic value of 18F-FDG PET and 99Tcm-MDP imaging in detection bone metastases. Methods 93 patients were undergone 18F-FDG PET and 99Tcm-MDP imaging within 2 weeks. The results of the 2 different modalities were analyzed. Results Of the 93 patients, 64 patients were found to have bone metastases by PET and MDP imaging. Among the 64 patients, 43 patients were found both positive PET and MDP. 16 patients had positive PET whereas negative MDP. 5 patients had negative PET whereas positive MDP. The sensitivity, specificity and accuracy of 18F-FDG PET and 99Tcm-MDP imaging were 92.2 %, 75.0 %(P 0.05), 92.5 %,76.3 %(P

This study was designed to investigate the effect of 5,2',4'-trihydroxy-6,7,5'-trimethoxy flavone nanoparticle (TTF1-NP) on inducing apoptosis of implanted tumour cells in nude mice and the mechanism of endoplasmic reticulum stress pathway. The implanted hepatoma model was established in nude mice, and used to test the drug TTF1-NP in five groups (vehicle, 5 μmol·kg^-1 TTF1-NP, 10 μmol·kg^-1 TTF1-NP, 20 μmol·kg^-1 TTF1-NP and adriamycin). The nude mice were killed after the treatment to determine the tumor growth inhibition rate (IR). Morphological changes of implanted tumor cells were observed by HE staining; apoptosis of tumor cells was detected by TUNEL; the protein expression of GRP78, p-JNK and caspase 12 were analyzed using immunocytochemistry staining and Western blotting. We tested the effects of TTF1-NP on implanted HepG-2 cell tumor growth in nude mice. TTF1-NP-treated mice showed volume of tumor smaller than that of the vehicle-treated mice. The tumor mass of the TTF1-NP-treated mice were significantly reduced than those of the vehicle-treated mice. In addition, the tumor growth rate of the TTF1-NP-treated mice was significantly lower than that of the vehicle-treated mice, and the tumor growth inhibition ratio of the TTF1-NP-treated mice was significantly higher than that of the vehicle-treated mice. TTF1-NP exhibited an inhibitory effect on implanted tumor cells in the model. The IR was 51.2%, 54.2%, 61.8% and 65.9%, respectively. In comparison with the vehicle group, the treated groups exhibited alteration in cell morphology and apoptosis of tumor cells, and expression of GRP78, p-JNK and caspase 12, which were observed by immunocytochemistry staining and Western blotting. Taken together, our results suggest that TTF1-NP induces apoptosis of implanted tumor cells in nude mice and the main mechanism is related to activation of endoplasmic reticulum stress.

Objective: To study the relationship between the single nucleotide polymorphism of HLA⁃A rs3132682 and the risk of liver cancer. Methods: The author selected 291 cases of liver cancer patients in Yanbian area as the experimental group and 272 healthy people as the control group. The genotypes and allele frequencies of the two loci were detected by MassARRAY SNPS mass spectrometry. Odds ratio (OR) and 95% confidence interval (CI) were calculated by unconditional logistic regression to evaluate the risk of liver cancer in patients with different genotypes. Results: There were G and C alleles in HLA⁃A rs3132682 locus , GG , GC and CC genotype. After adjusting for confounding factors in HLA⁃A rs3132682 locus , there was correlation between CC genotype and the risk of liver cancer compared with GG genotype (P < 0. 05) . Stratification analysis showed that compared with the population with CG + GG genotype , the Korean population with CC genotype increased the risk of liver cancer by 3. 331 times. Conclusion The single nucleotide polymorphism of HLA⁃A rs3132682 is correlated with the risk of liver cancer in Yanbian area.

To study the inhibitory effect of Rhaponticum uniflorum on apoptosis induced by H2O2 in HepG2 cells. Human HepG2 cells injury models were established by H2O2, then cell survival rate was assayed by MTT method; levels of LDH, ALT, and AST were detected by chemical colorimetric method;SOD activity was detected by xanthine oxidase method; GSH content was detected by dithio-bis-nitrobenzoic acid(DTNB); MDA level was detected by thiobarbituric acid (TBA) method;and the relative activities of Caspase-3, 8 and 9 were measured by Colorimetry. The expression levels of Cleaved Caspase-3(Casp-3), cytochrome(Cyto c), NF-κB, ERK, JNK, p38 MAPK, as well as the phospharylated proteins were determined with Western blotting method. The results showed that R. unifloru had no significant effect on cell viabilities of HepG2 cells at the concentrations of 25-400 mg•L⁻¹. However, H2O2decreased the cell viabilities, increased the cellular oxidative stress, and up-regulated the protein expressions of Casp-3, cytoplasmic Cyto c, p-JNK and nuclear NF-κB. As compared with the model group,R. unifloru could increase the cell viability, reduce LDH, ALT and AST leakage, reduce the MDA formation, increase the SOD and GSH levels,reduce the relative activities of Caspase-3, 8 and 9, down-regulated the protein expressions of Casp-3 and cytoplasmic Cyto c, and down-regulate the p-JNK and nuclear NF-κB levels.The results indicated that R. unifloru had the inhibitory effect on apoptosis induced by H2O2in HepG2 cells, and the mechanism maybe associated with inhibiting JNK activation and NF-κB nuclear translocation.

Objective: To explore the effect of Huangqi-Baoxin decoction combined with conventional western medicine on the cardiac function of the patients with diabetic cardiomyopathy (DCM). Methods: A total of 103 DCM patients who met the inclusion criteria were divided into the control group (51 cases) and the research group (52 cases) by random number table method. The control group was treated with conventional therapy, while the study group was treated with Huangqi-Baoxin decoction on the basis of the control group. Both groups were treated for 3 months. TCM syndromes were scored before and after treatment. The serum GSH-Px, SOD and CRP levels were measured by ELISA. Left ventricular ejection fraction (LVEF) and E/A ratio of early diastolic peak velocity to late diastolic peak velocity (E/A) were measured by echocardiography and then evaluate the clinical efficacy. Results: The total effective rate was 92.3% (48/52) in the study group and 76.5% (39/51) in the control group. There was significant difference between the two groups (χ²=4.922, P=0.027). After treatment, the scores of palpitation, shortness of breath, chest tightness and chest pain, fatigue, hypochondriac mass, spontaneous sweating, edema and total scores in the study group were significantly lower than those in the control group (t values were 10.603, 9.997, 10.546, 10.074, 5.211, 3.981, 6.438, 13.502, P<0.01). After treatment, LVEF (46.03% ± 1.70% vs. 42.33% ± 1.63%, t=11.271) and E/A (1.02 ± 0.17 vs. 0.90 ± 0.16, t=3.796) in the study group were significantly higher than those in the control group (P<0.01). After treatment, the serum GSH-Px and SOD levels in the study group were significantly higher than those in the control group (t values were 7.585, 6.816, P<0.01), and CRP level was significantly lower than the control group (t=10.854, P<0.01). Conclusions The Huangqi-Baoxin decoction combined with routine western medicine therapy can improve the clinical symptoms and cardiac function of DCM patients, reduce oxidative stress injury and inhibit inflammation.

Objective : To analyze the association between multiple loci of genes and the risk of early⁃onset pre⁃ eclampsia (EOPE) with pregnancy induced hypertension. Methods : Among 382 EOPE patients who had lived in Yanbian area for more than 10 years , 192 patients were randomly selected as case group. At the same time , 192 cases of natural delivery in the hospital were randomly selected as the control group. PCR⁃RFLP method was used to determine the specific genotype and allele distribution information , and non⁃conditional Logistic method was used to obtain odds ratio (OR) and 95% confidence interval (CI) to confirm the risk of various genotypes. Results : There were two alleles of T and C at the GRB2 rs8082005 locus , TC , TT , and CC genotypes. There were two alleles of T and C at the RXRA rs3849222 locus , TC , TT , and CC genotypes. Through unconditional logistic regression analysis , in the GRB2 rs8082005 locus , compared with the TT genotype , the CC genotype was more susceptible to EOPE ( OR = 3. 155 , 95% CI = 1. 513 - 6. 579 , P = 0. 002) . In the explicit model , compared to patients with TT+ TC genotype , patients with CC genotype increased the risk of EOPE ( OR = 3. 000 , 95% CI = 1. 495 - 6. 022 , P = 0. 002) . In the RXRA rs3849222 locus , compared with the CC genotype , the TT genotype was more susceptible to EOPE ( OR = 2. 031 , 95% CI = 1. 077 - 3. 820 , P = 0. 028) . In the invisible model , compared to patients with CC + CT genotype , patients with TT genotype had an increased risk of EOPE ( OR = 2. 549 , 95% CI = 1. 421 - 4. 573 , P = 0. 002) . Conclusion There is a significant correlation between single nucleotide polymorphism (SNP) at the GRB2 rs8082005 and RXRA rs3849222 loci and the risk of EOPE in pregnant women with gestational hypertension in Yanbian area.

Objective : To investigate the relationship between the single nucleotide polymorphism of PPARG rs2290449 and the efficacy of combination therapy in sepsis patients with MODS． Methods : 382 cases of sepsis with MODS were selected and divided into the effective group and the ineffective group，and a case-control study was conducted．PCR-RFLP and Sequenom MassARRAY were used to detect the genotype and allele frequencies of the loci． Unconditional Logistic regression was used to calculate odds ratio ( OR) and 95% confidence interval ( CI) to evaluate the efficacy of combination therapy for sepsis with MODS in patients with different genotypes. Results: There were G and A alleles in PPARG rs2290449 locus，GG、GA and AA genotype．Non-conditional Logis- tic regression analysis showed that compared with the GG genotype group，the GA genotype group had a significant correlation with the efficacy of combination therapy for sepsis with MODS ( OR = 0. 449，95% CI = 0. 280－0. 722，P = 0. 001) ．In the dominant model，there was a significant correlation between the GA + AA genotype and the effi- cacy of combination therapy compared with the GG genotype ( OR = 2. 104，95% CI = 1. 332－3. 321，P = 0. 001) . After adjusting for confounding factors，unconditional Logistic regression analysis showed that compared with the GG genotype，the GA + AA genotype was significantly correlated with the efficacy of combination therapy in sepsis pa- tients with MODS ( OR = 2. 307，95% CI = 1. 438 －3. 701，P = 0. 001 ) ．Stratified analysis showed that compared with the population carrying GG genotype，the population carrying GA + AA genotype was significantly correlated with the efficacy of combination therapy in sepsis with MODS in the stratified analysis of age，gender and ethnicity. Conclusion PPARG rs2290449 single nucleotide polymorphism is significantly correlated with the efficacy of com- bination therapy in sepsis patients with MODS in Yanbian area.