AIM: To report the clinical manifestations of localized peripapillary detachment in pathologic myopia and to evaluate its underlying associations and causes.METHODS: From December 2002 to January 2004, 10eyes from 7 patients with high myopia were identified to have localized peripapillary detachment by optical coherent tomography (OCT). The features were described together with the fundus fluorescein angiography, indocyanine green angiography and multifocal electroretinogram.RESULTS: Localised peripapillary detachments did not cause any symptoms by themselves and all the lesions were recognized because of other ocular problems. The areas of peripapillary detachment were all located within the posterior staphyloma. In the 5 eyes with type 1 staphyloma, the locations of detachment were all in the nasal half of the peripapillary area. In the other 5 eyes with type 2 and 3 staphyloma, the locations of detachment were all in the non-nasal peripapillary area. The difference between these two groups was statistically significant (Fisher's exact test, ,P= 0.01).CONCLUSION: Peripapillary detachment is probably a benign complication of posterior staphyloma in pathologic myopia. The site of peripapillary detachment is affected by the location of staphyloma and OCT is important in making the diagnosis.

Cadherins ; genetics ; Hearing Loss, Sensorineural ; genetics ; pathology ; Humans

OBJECTIVETo investigate allelic frequencies of interluekin-10 (IL-10) gene promoter in Miao, Dong and Buyi ethnics of Guizhou.

METHODSTaqMan MGB-based real-time PCR was used to determine the genotypes of IL-10 -819 and IL-10 -592 in 589 Miao, Dong and Buyi ethnics of Guizhou.

RESULTSThe allelic frequency of IL-10 -819 in Miao ethnics was significantly different from those in Dong or Buyi ethnics. Allelic frequencies of IL-10 -592 in Miao ethnics was significantly different from those in Dong or Buyi ethnics. In Miao, Dong and Buyi ethnics, the distributions of genotype frequencies of IL-10 -819 and IL-10 -592 were statistically different from Han ethnics from Guizhou and Taiwan of China as well as South Koreans.

CONCLUSIONThere is a heterogeneity in the frequencies of polymorphisms of IL-10 promoter among different ethnic groups.

Alleles ; Asian Continental Ancestry Group ; ethnology ; genetics ; China ; ethnology ; Gene Frequency ; Genetics, Population ; Genotype ; Humans ; Interleukin-10 ; genetics ; Polymorphism, Single Nucleotide ; Population Groups ; genetics ; Promoter Regions, Genetic

Objective To investigate the association between both regulated upon activation normal T cell expressed and secreted (RANTES)-403G/A,-28C/G gene polymorphism and the susceptibilities to hepatitis B virus (HBV) infection,among people with Dong and Han ethnicities,in Guizhou.Methods A total of 229 individuals with HBV persistence infection,161 HBV clearanced patients and another 200 controls were recruited to conduct a case-control study among residents with Dong or Han ethnicities.Allelic frequencies of both RANTES-403G/A and-28C/G were identified by TaqMan-MGB probe.Results Both RANTES-403G/A and-28C/G polymorphism in the HBV-persistent group,when compared to the HBV-clearances group,no significant difference was found (P＞0.05).Results from the univariate analysis showed that subjects carrying-403AG and-28GG genotype had higher risk on the susceptibility to HBV persistence infection.The distributions of RANTES-28C/G gene polymorphism between Dong minority and Han ethnicities regarding HBV persistence showed statistically significant difference (P＜0.05).There was no difference on the distributions of RANTES-403G/A gene polymorphism between Dong minority and Han ethnicities.Conclnsion Patients that carrying both RANTES-403AG and-28GG genotype had higher risk on the persistence to HBV,while RANTES-403A had contributed to the clearance of HBV infection.

AIMTo study the release and cell uptake characteristics of 9-nitrocamptothecin (9-NC) nanostructured lipid carrier system (NLC) in vitro and its tissue distribution characteristics in vivo.

METHODSMouse peritoneal macrophages were used to investigate the uptake of nanoparticles by cells in vitro. The tissue distribution of 9-nitrocamptothecin solution and stealth nanostructured lipid carrier system (S-NLC) was determined after intravenous administration to mice at a single dose of 1.5 mg kg(-1). The release and crystalloid characteristics were also investigated.

RESULTSX-ray diffraction spectrum showed that 9-NC probably was amorphous in S-NLC. The liquid lipid did not change the characteristics of the solid matrix in nanoparticles. The in vitro release and cell uptake characteristics of stealth and non-stealth 9-NC-NLC were investigated, separately. The results showed that the stealth 9-NC-NLC had sustained-release characteristics and could resist the absorption effect of the additional plasmas to a certain extent. In addition, the cell uptake percentage of stealth 9-NC-NLC was much lower than that of the non-stealth ones. The tissues distribution results showed that 9-NC in the S-NLC was mainly found in the lung, liver, pancreas and ovary/uterus, while the quantity of 9-NC was much lower in heart and kidney. The AUQ(0-t), of S-NLC in blood, ovary/uterus, pancreas, liver and lung were higher than that of 9-nitrocamptothecin solution. The weight-average drug targeting efficiency (Te*) of S-NLC in liver and lung were significantly higher than that of 9-nitrocamptothecin solution. The mean residence times (MRT) of S-NLC was 44 h, while that of 9-nitrocamptothecin solution was 8 h. Therefore, S-NLC showed obvious targeting effects on liver and lung.

CONCLUSIONS-NLC with PEG flexible chains has sustained-release characteristics and can prolong its circulation in blood and have good targeting efficiency on liver and lung.

Animals ; Antineoplastic Agents ; administration & dosage ; chemistry ; pharmacokinetics ; Camptothecin ; administration & dosage ; analogs & derivatives ; chemistry ; pharmacokinetics ; Delayed-Action Preparations ; Drug Carriers ; Drug Delivery Systems ; Female ; Hexoses ; chemistry ; Liver ; metabolism ; Lung ; metabolism ; Macrophages, Peritoneal ; physiology ; Mice ; Nanoparticles ; Particle Size ; Phagocytosis ; Phosphatidylcholines ; chemistry ; Polyethylene Glycols ; chemistry ; Tissue Distribution

Retaining or improving periodontal ligament (PDL) function is crucial for restoring periodontal defects. The aim of this study was to evaluate the physiological effects of low-power laser irradiation (LPLI) on the proliferation and osteogenic differentiation of human PDL (hPDL) cells. Cultured hPDL cells were irradiated (660 nm) daily with doses of 0, 1, 2 or 4 J⋅cm(-2). Cell proliferation was evaluated by the 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) assay, and the effect of LPLI on osteogenic differentiation was assessed by Alizarin Red S staining and alkaline phosphatase (ALP) activity. Additionally, osteogenic marker gene expression was confirmed by real-time reverse transcription-polymerase chain reaction (RT-PCR). Our data showed that LPLI at a dose of 2 J⋅cm(-2) significantly promoted hPDL cell proliferation at days 3 and 5. In addition, LPLI at energy doses of 2 and 4 J⋅cm(-2) showed potential osteogenic capacity, as it stimulated ALP activity, calcium deposition, and osteogenic gene expression. We also showed that cyclic adenosine monophosphate (cAMP) is a critical regulator of the LPLI-mediated effects on hPDL cells. This study shows that LPLI can promote the proliferation and osteogenic differentiation of hPDL cells. These results suggest the potential use of LPLI in clinical applications for periodontal tissue regeneration.
Adenine ; analogs & derivatives ; pharmacology ; Adenylyl Cyclase Inhibitors ; Alkaline Phosphatase ; analysis ; genetics ; radiation effects ; Anthraquinones ; Bone Morphogenetic Protein 2 ; genetics ; Calcium ; metabolism ; radiation effects ; Cell Culture Techniques ; Cell Differentiation ; radiation effects ; Cell Line ; Cell Proliferation ; radiation effects ; Coloring Agents ; Core Binding Factor Alpha 1 Subunit ; genetics ; Cyclic AMP ; antagonists & inhibitors ; radiation effects ; Gene Expression ; radiation effects ; Humans ; L-Lactate Dehydrogenase ; analysis ; Lasers, Semiconductor ; Low-Level Light Therapy ; instrumentation ; Osteocalcin ; genetics ; Osteogenesis ; genetics ; radiation effects ; Periodontal Ligament ; cytology ; radiation effects ; Radiation Dosage ; Real-Time Polymerase Chain Reaction ; Reverse Transcriptase Polymerase Chain Reaction ; Tetrazolium Salts ; Thiazoles

Objective To explore the relationship between -262C/T and -21A/T polymorphisms of catalase(CAT) gene and coal-burning borne fluorosis. Methods In 2007, 150 villagers were taken as a nonintervention group in Bijie city from the village of coal-burning borne fluorosis areas with unchanged cooking stoves;150 villagers were taken as the intervention group from the town of Changchun county where cooking stoves changed; 150 villagers were taken as control from non-endemic fluorosis areas in Baiyun town of Changshun county.PCR-restriction fragment length polymorphism were employed to detect genotypes of CAT-262C/T and CAT-21A/T polymorphism of CAT gene. Results The genotypic frequencies of CAT-262C/T and CAT-21A/T in nonintervention group,intervention group and control group were in line with Hardy-Weinberg equilibrium law (P＞ 0.05 ).The genotypes of CC and CT were detected while no TT were detected for CAT-262C/T polymorphism; the genotypes of AA, AT and TT were detected for CAT-21A/T. The genotype frequencies of CAT-262 CC, CT in control group, intervention group and non-intervention group were (89.33%(134/150), 10.67%(16/150); 88.67%(133/150), 11.33% (17/150),93.33% (140/150),6.67% (10/150), respectively. The gene frequency of C in control group, intervention group and non-intervention group were (94.67% (284/300), 94.33% (283/300),96.67%(290/300), respectively. The gene frequency of T in control group, intervention group and non-intervention group were 5.33%(16/300), 5.67%(17/300), 3.33%(10/300), respectively. The genotype frequencies of CAT-21 AA,AT and TT in control group, intervention group and non-intervention group were 48.67%(73/150),46.00%(69/150),5.33%(8/150) ,52.67%(79/150) ,38.00%(57/150) ,9.33% (14/150) ,51.33%(77/150) ,38.00%(57/150), 10.67%(16/150), respectively. The gene frequency of A in control group, intervention group and non-intervention group were 71.67%(215/300),71.67%(215/300),70.33%(211/300), respectively. The gene frequency of T in control group, intervention group and non-intervention group were 28.33% (85/300),28.33% (85/300),29.67% (89/300),respectively. CAT-262C/T and CAT-21A/T genotype and allele frequencies in the control group, the intervention group and non-intervention group showed no significant differences in the distribution(x2= 0.331,0.336, all P ＞0.05 ). Conclusion CAT-262C/T and CAT-21A/T polymorphism is not associated with coal-burning borne fluorosis.

ObjectiveTo observe the distribution of vitamin D receptor(VDR) gene polymorphisms in coal-burning borne fluorosis in Guizhou province and investigate the relationship between VDR gene polymorphisms and the susceptibility to coal-burning borne fluorosis.MethodsOne hundred and fifty villagers from non-improving cooking stove villages were selected as a non-intervention group in Bijie area,Guizhou province where coal-burning borne fluorosis was prevailing; 150 villagers were chosen from cooking stove improved villages as a intervention group; 150 villagers were selected from non-endemic area Changshun county as a control group.DNA was extracted from peripheral blood samples of these people.Genotype of VDR gene Bsm Ⅰ and Fok Ⅰ loci were detected using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP).ResultsDistribution of Bsm Ⅰ polymorphism site of VDR gene of control group [AA:19.3％ (29/150),AG:39.3％ (59/150),GG:41.3％(62/150)],was compared with that[AA:4.7％(7/150),AG:14.0％(21/150),GG:81.3％(122/150)] of the non-intervention group and that[AA:7.3％(11/150),AG:23.3％(35/150),GG:69.3％(104/150)] of intervention group,and the difference was statistically significant(X2 =56.6,P ＜ 0.05).The frequency of VDR-Fok Ⅰ loci in non-intervention group [TT:29.3％(44/150),TC:55.3％(83/150),CC:15.3％(23/150)] and intervention group [TT:32.7％(49/150),TC:55.3％(83/150),CC:12.0％(18/150)] was compared with that [TT:45.3％(68/150),TC:48.7％(73/150),CC:6.0％(9/150)] of control group,and the difference was statistically significant(X2 =11.9,P ＜ 0.05).Univariate analysis showed that individuals carrying the GG genotype had increased risk of suffering fluorosis than individuals carrying the AA and AG genotypes(OR values were 6.2,3.2,all P ＜ 0.05),while carrying the TC and CC genotype had increased risk of suffering fluorosis than individuals carrying the TT genotype (OR values were 1.3,2.8,1.3,2.1,all P ＜ 0.05).ConclusionVDR gene polymorphisms may be one of the predisposing factors of coal-burning borne fluorosis.

BACKGROUNDTo study the deletion and mutation in carboxy terminal region of LMP1 gene derived from nasopharyngeal carcinoma (NPC) in Guangdong and Guangxi, the high risk areas of nasopharyngeal carcinoma in China.

METHODSLMP1 gene carboxy terminal region was amplified from nasopharyngeal carcinoma tissues by PCR, and then cloned and sequenced.

RESULTSOf the 20 cases, 17 were LMP1 positive. In all positive cases, only 1 case did not show deletion. Four positive cases were chosen for DNA sequencing, The rusult showed that all the four cases had mutation and the 30bp deletion.

CONCLUSIONSHigh frequency of deletion and mutation in LMP1 gene of nasopharyngeal carcinoma tissues was found in Guangdong and Guangxi. Whether it related to the high incidence of NPC should be further studied.

Amino Acid Sequence ; Base Sequence ; Gene Deletion ; Herpesvirus 4, Human ; genetics ; Humans ; Molecular Sequence Data ; Nasopharyngeal Neoplasms ; virology ; Point Mutation ; Sequence Analysis, DNA ; Viral Matrix Proteins ; genetics

Objective To investigate the association between interleukin-10 (IL-10) gene promoter microsatellite polymorphisms and the susceptibility to hepatitis B virus infection in Han,Yi and Yao ethnicities in GuiZhou province.Methods 500 volunteers were selected from Guizhou province.Ailelic frequency of IL-10.G and IL-10.R loci was identified by short tandom repeat polymerase chain reaction.The relativity between allelic frequency and HBV infection was analyzed.Results Genotype data from H-W analysis on all the IL-10 polymorphisms indicated that it was a random distribution.Very high HBV infection rates were found in the native ethnic minorities of Guizhou province.The overall HBV infection rate among the total population was 67.00％,with the HBV infection rates of Yi nationality in Weining,Yi nationality in Qianxi,Yao nationality in Libo and Han nationality in Libo as 51.85％,42.86％,79.52％ and 84.30％,respe~vely.The polymorphisms distribution of IL- 10.G and IL- 10.R were statistically different among the ethnic groups (P＜ 0.05 ).The polymorphisms distribution of IL-10.R had no significant difference between HBV infection group and non-infection group,as well as among HBV natural removal group and non-infected group in all the ethnic groups.The frequency of IL-10.G 459 bp (19CA) was significantly higher in non-infection group than in the infected group (P＜ 0.05 ).The frequency of IL-10.G 471 bp (25CA) was significantly higher in the non-infection group than in the HBV natural removal group(P＜0.05).The polymorphisms distribution of IL-10.G did not show significant difference between the HBV infection group and the HBV natural removal group in all the ethnic groups.We did not find any differences in allelic and genotypic frequencies of IL-10.G between infection group and non-infection group in Yi nationality in Weining,and Yao nationality in Libo (P＞0.05),as well as HBV natural removal group and non-infected group (P＞0.05).Conclusion The polymorphisms distribution of IL-10.R and IL-10.G did not show significant difference in Yi,Yao and Han ethnics population living in Guizhou province.IL-10.G seemed to influence the susceptibility of HBV infection in Han,Yao and Yi ethnics population of Guizhou province.