Lipid-mediated gene transfer of acidic fibroblast growth factor into human corneal endothelial cells

The aim of this study was to optimize non-viral gene transfer conditions and investigate the effect of fibroblast growth factor-1 (FGF-1) gene transfer on human corneal endothelial cell (HCEC) proliferation. Five non-viral vectors (Lipofectin, DMRIE-C, DAC-30, Effectene, FuGene6) were used to transfect HCEC with plasmids coding for enhanced green fluorescent protein (EGFP) and FGF-1. Transfection efficiency and toxicity (n=6) were quantified and optimized using the EGFP construct by FACS-analysis. Using optimal conditions HCEC were transfected with the FGF-1 plasmid and cell proliferation as well as expression of FGF-1 were determined at days 4 and 7 by counting and western blotting, respectively. Lipofectin (17+/-2.02%) transfected HCEC more successfully than DMRIE-C (11+/-1.46%), Effectene (9+/-0.62%), FuGene (9+/-0.93%) and DAC-30 (7+/-0.59%). Toxicity of the lipids ranged from 2 to 4%. Optimal HCEC proliferation was achieved with DAC-30/FGF-1 (P<0.05), whereas all other vectors did not result in significantly increased cell proliferation. However, all of the transfected cells produced FGF-1 in different amounts as indicated by western blotting. Efficient and almost non-toxic transfer of the FGF-1 gene into HCEC can be successfully achieved by lipid-based techniques. Using optimal conditions significantly increased cell proliferation was independent on gene transfer efficiency. This may indicate that even a low transfection rate is sufficient to produce a concentration of FGF-1 that will have a stimulatory effect on HCECs.     

Mapping of a gene causing brittle cornea syndrome in Tunisian jews to 16q24

PURPOSE: To map the gene that causes brittle cornea syndrome (BCS). METHODS: Five patients from four families, all of Jewish Tunisian origin, were recruited into the study. Four of the five patients had red hair. DNA from the five patients and 104 control chromosomes was typed with seven 16q polymorphic markers surrounding the hair color gene, MC1R. RESULTS: A common haplotype in the homozygous state, comprising five markers spanning 4.7 Mb on chromosome 16q24, was found in all five patients but in none of the control subjects (P < 0.00001). CONCLUSIONS: The gene that causes BCS maps to a 4.7-Mb interval, between the markers D16S3423 and D16S3425 on 16q24.     

PRK和LASIK治疗中低度近视2年后的疗效对比分析

目的：比较准分子激光屈光性角膜切削术（ＰＲＫ）和准分子激光原位角膜磨镍术（ＬＡＳＩＫ）治疗中低度近视的疗效。方法：回顾分析经２年以上随访６００度以下的６８例（１１６眼）ＰＲＫ患和５３例（８３眼）ＬＡＳＩＫ患得的术后视力、屈光度的变化,以及对其并发症进行比较。结果：ＰＲＫ组术后１周视力明显提高,６个月趋于稳定;ＬＡＳＩＫ组第２天视力明显提高,１个月稳定;２年时ＰＲＫ组有９５．２％的患达到术前矫症     

2015—2017年中国城市居民肿瘤早治疗意识现况及相关因素分析

目的分析中国城市居民肿瘤早治疗意识及其人口学、社会学等影响因素。方法采用横断面调查的方法,于2015—2017年以2015年度"城市癌症早诊早治项目"覆盖的16个项目省份为研究现场,采用整群及方便抽样的方法,将年龄≥18岁、能够理解调查程序的居民纳入研究。共纳入32257名研究对象,其中社区居民、癌症风险评估/筛查干预人群、现患癌症患者及职业人群分别有15524、8016、2289、6428名。调查问卷收集个人信息、肿瘤早治疗态度及影响其态度的原因等信息。比较不同组别早治疗态度构成比的差异;采用多因素logistic回归模型分析肿瘤早治疗态度的影响因素。结果假设本人被确诊为癌前病变/癌症,社区居民、癌症风险评估/筛查干预人群、现患癌症患者和职业人群选择积极治疗者分别占89.97%、91.84%、93.00%和91.52%(P<0.001);假设直系亲属被确诊为癌前病变/癌症,4组人群选择鼓励亲属早期治疗者分别占91.96%、91.94%、92.44%、91.55%(P<0.001)。公司职员、家庭年收入4万元及以上者、其他3个亚组人群选择积极治疗意愿相对较高(P<0.05);男性、丧偶、无业人员、中西部地区的受访者积极治疗的意愿较低(P<0.05)。结论2015—2017年中国城市居民肿瘤早治疗意识较高;婚姻状况、职业、家庭年收入、区域是居民肿瘤早治疗意识的影响因素。     

Expression of neurocan mRNA and ultrastructure of brain tissue after cerebral ischemia and reperfusion in stroke-prone renovascular hypertensive rats treated by electroacupuncture

We established a stroke-prone renovascular hypertensive rat model by bilateral constriction of the renal artery with sliver loop clips. After ten weeks, middle cerebral artery occlusion was induced for 2 hours. The rats then received electro-acupuncture at Baihui (DU 20) and Dazhui (DU 14) after onset of ischemia for 30 days. In situ hybridization study showed that electroacupuncture significantly reduced the number of neurocan mRNA-positive cells in the ischemic penumbra and hippocampal tissues of rats. El...     

对2002～2003年国家科技部统计源期刊科技论文的比较研究

通过对2002年2003年中国科技论文与引文数据库（CSTPCD）中数据的对比分析，从我国科技论文数地区分布、高等院校分布、医疗机构分布及医学类高等院校情况四个方面，进行量化比较，认为：各地区、各单位的科研力量是影响统计论文排名的首要因素；是否重视作者在科技论文统计源期刊上发表文章，是影响各地、各单位统计排名的一个重要因素。     

Familial pure proximal renal tubular acidosis--a clinical and genetic study.

BACKGROUND: Inherited proximal renal tubular acidosis (pRTA) is commonly associated with more generalized proximal tubular dysfunctions and occasionally with other organ system defects. Inherited combined pRTA and distal RTA with osteopetrosis and pure pRTA associated with ocular abnormalities, a rare disease which has been recently described. Only one family with pure isolated pRTA has been reported so far and the genetic cause for this disease is unknown. Objectives. We report a unique family with isolated pRTA. The aim of the project was to define the phenotype and to try to find the gene defect causing the disease. METHODS: Clinical and metabolic evaluation of all family members was performed and a family pedigree was constructed. DNA was extracted from blood samples of affected and unaffected family members. We amplified by PCR and sequenced the coding areas and splice-sites of the genes that contribute to HCO(-)(3) reclamation in the proximal tubule. The genes studied were as follows: CA II, CA IV, CA XIV, NCB1, Na(+)/H(+) exchanger (NHE)-3, NHE-8, the regulatory proteins of NHE3, NHRF1 and NHRF2 and the Cl(-)/HCO(-)(3) exchanger, SLC26A6. RESULTS: The father and all four children had RTA with blood HCO(-)(3) levels of 11-14 meq/l and urine pH of 5.3-5.4. Increased HCO(-)(3) fractional excretion after bicarbonate loading to 40-60% confirmed the diagnosis pRTA. No other tubular dysfunction was found, and no organ system dysfunction was detected, besides short stature. No mutation was found in all candidate genes studied. CONCLUSIONS: We presented a second family in the literature with familial isolated pure pRTA. The mode of inheritance is compatible with an autosomal dominant disease. Because of the small size of the family, wide genome search was not applicable and the gene candidate approach was chosen. Nine important candidate genes were extensively studied but the molecular basis of the disease was not yet found and genotyping nine important gene candidates were negative.     

Effect of factor X inhibition on coagulation activation and cytokine induction in human systemic inflammation

Anticoagulants have gained increasing attention in the treatment of sepsis. This study used danaparoid to investigate the role of factor Xa in endotoxin-induced coagulation and inflammation and its effectiveness when coagulation activation has already occurred. Thirty healthy volunteers were enrolled in the randomized, placebo-controlled trial. Subjects received 2 ng/kg endotoxin and danaparoid 10 min or 3 h thereafter or placebo. Endotoxin increased prothrombin fragment 1+2 (F(1+2)) levels from 0.5 to 7.0 nmol/L at 5 h in the placebo group. Early danaparoid infusion inhibited endotoxin-induced thrombin formation: maximum F(1+2) levels reached only 1.8 nmol/L (P<.01, vs. baseline or placebo). Delayed danaparoid infusion effectively blocked further thrombin formation. However, danaparoid did not alter endotoxin-induced changes in the fibrinolytic system, cytokine levels, activation of leukocytes, or tissue factor expression on monocytes. Danaparoid therefore selectively attenuates endotoxin-induced coagulopathy, even with delayed administration when coagulation activation is well under way.     

应用超声生物显微镜观察高褶虹膜综合征患者的房角变化

目的 在光照和暗室条件下,通过超声生物显微镜(UBM)观察高褶虹膜综合征患者房角的变化情况.方法 对诊断为高褶虹膜综合征的20例患者(24眼),在光照和暗室条件下分别行UBM检查.结果 暗室条件下,24眼房角均关闭.在光照条件下,房角关闭16眼,开放8眼,房角开放眼均为周边虹膜肥厚型.结论 由于周边虹膜肥厚所致的高褶虹膜综合征患者,其房角的状态随光照条件的改变呈动态变化,在暗室条件下,房角关闭,在光照条件下,房角开放.临床中可行UBM检查鉴别窄角慢性单纯型青光眼.