Background Many surgical techniques are used to improve the postoperative visual acuity for rhegmatogenous retinal detachment(RRD)during recent decade,and scleral buckling surgery is one of these operations.Whether the visual function after operation can be rescued is an important issue. Objective The aim of this study was to analyze the risk factors of influencing the postoperative vision following scleral buckling surgery for primary macula-off RRD. Methods The clinical and follow-up data from consecutive series of 116 eyes of 116 patients received scleral buckling surgery for primary maeula-off RRD were retrospectively reviewed.The relationship of multiple factors,including age,preoperative best corrected visual acuity(BCVA),duration of disease,refractive error,location of retinal hole,number of retinal hole,area and height of retina detachment,management of subretinal fluid and intravitreal gas injection,with visual acuity were analyzed respectively by χ2 test.The correlations among statistically significant factors with postoperative vision were analyzed by multivariate Logistic regression analysis.Written informed consent was obtained from any patient before surgery. Results The postoperative vision outcome was found with significantly difference among different preoperative vision groups(P=0.002)and different course (P=0.009).There were significant differences between the groups with different preoperative BCVA(P=0.002)and duration of disease(P=0.009).Multivariate Logistic regression analysis showed that the preoperative BCVA was the only variable affecting postoperative visual result(r=0.400,P=0.009).Considerable linear correlation wag seen between preoperative vision and postoperative vision(r= 0.400,P=0.000).The probability with postoperative vision of t>0.4 in the eyes with preoperative≥0.05 was 3 folds more than that of preoperative<0.05(OR=2.992).The better visual outcome after scleral buckling surgery was seen in the eyes with the course≤7 days. Conclusion Preoperative BCVA and duration of disease are the key factors associated with the postoperative BCVA.Scleral buckling surgery should be performed within the first week for primary macula-off RRD.

MicroRNAs (miRNAs) are critical regulators of gene expression. These small, non-coding RNAs are believed to regulate more than one third of protein-coding genes, and have been implicated in the control of many biological processes, including the biology of glioma. The functional significance in some of the miRNAs begins to emerge. This paper reviews the biogenesis of miRNAs, their roles in neuronal development and tumorigenesis of gliomas, and their contribution as tumor biomarkers. Research in this area is quickly gathering pace and is illuminating important aspects of the diseases that may ultimately lead to novel therapeutic interventions, as well as diagnostic and prognostic tools for brain tumors.

Induced pluripotent stem (iPS) cell based on recently developed stem cell reprogramming technique holds great hope for regenerative medicine,in vitro disease modeling and drug evaluation.Recent progress on clinical hematology includes in vitro generation of hematopoietic progenitors and mature blood cells from somatic cells,iPS cells derived from chronic myeloid leukemia cells for the better understanding of the resistance mechanisms of bcr-abl inhibitor imatinib,and moreover,correction the monogenic inherited disease using gene-targeted strategies.However,whether the iPS cells can fully replace human embryonic stem cells still needs further investigation.

Genomic diseases caused by pathogenic copy number variations (pCNVs) are a group of important causes for birth defects. At present, the methods used to detect CNV mainly include chromosomal microarray analysis (CMA) and copy number variation sequencing (CNV-seq) based on next generation sequencing (NGS). In recent years, CNV detection technology has been widely used in the field of prenatal diagnosis. To standardize the clinical application of such technologies, the authors have formulated a guideline for the application of CNV testing in prenatal diagnosis, which includes the basic requirement, scope of application, clinical testing and consultation, procedure of CNV analysis in prenatal diagnosis, with an aim to better serve the patients.

OBJECTIVE: To explore pharmacokinetics and relative bioavailability of penehyclidine hydrochloride in healthy subjects. METHODS: This study was an open, randomized and cross-over trial design. Twelve healthy subjects were randomized to receive pharmacokinetic analysis which were performed according to the order of ABC, BCA and CAB, and then pharmacokinetic trial of multiple dose was performed following penehyclidine hydrochloride. Twenty healthy subjects were selected to receive bioavailability study following an order of BD or DB. Blood and urine samples were collected at prescribed time and then investigated by LC-MS/MS. RESULTS: The 11 of 12 cases finished the pharmacokinetic trial. The lineare ranges of penehyclidine hydrochloride in plasma and urine were 0.1-8 ng·mL-1, 1-100 ng·mL-1, respectively and accuracy of the method was within 85%-115%. The concentration-time curve of penehyclidine hydrochloride was dose dependent within the ranges of 0.4-0.8 mg after oral administration. ρmax and AUC were significantly increased (P<0.01), Vd and CL were significantly decreased (P<0.01) following multiple dose. The relative bioavailability of penehyclidine hydrochloride was (72.44±21.03)%. The average cumulative excretion rate of penehyclidine hydrochloride with original form accounted for (4.98±1.10)% of the total administered dose. CONCLUSION: The characteristic of linear pharmacokinetics of penehyclidine hydrochloride is performed in healthy subjects after oral administration. Its excretion is mostly via non-urinary system or other metabolites.

Objective: To investigate the relationship between prognosis of patients with primary clear cell renal cell carcinoma (ccRCC) after radical nephrectomy and expression of tumor metastasis-associated gene CD99 and to analyze the prognostic factors of ccRCC paiients. Methods: Semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR) was used to examine the expression of CD99 in primary ccRCC tissues and their corresponding adjacent tissues. The prognosis and risk factors of survival time of patients were studied by follow-up investigation, and the main risk factors were screened by Cox hazard regression model. Results: Compared with the adjacent renal tissues, 73.5% ccRCC tissues had up-regulated CD99 expression, with significant difference found between the two groups (P=0.000). Cox hazard regression model showed that high CD99 expression in ccRCC tissues was not a survival risk factor of ccRCC patients after radical nephrectomy (HR=0.14, 95%CI[0.01, 2.15]); and age (HR=1.18, 95%CI[1.01, 1.38]), TNM stages (HR=51.91, 95%CI[4.31, 625.87]), diabetes (HR=59.94, 95%CI[2.21, 1 627]) and hypertension (HR=47.72, 95%CI[1.37, 1 670]) were the major risk factors for the survival of patients after radical nephrectomy. The 1-year and 2-year survival rates of ccRCC patients in TNM stage I were significantly higher than those in TNM stage II-IV, respectively (100.0% vs 60.0%, P=0.004; 93.8% vs 8.3%,P=0.000). Conclusion: The expression of tumor metastasis-related gene CD99 may not be associated with the prognoses of ccRCC patients. Age, TNM stage, diabetes and hypertension are the major risk factors of prognosis after resection of ccRCC.

Objective: To predict the B cell epitopes of tumor-associated protein EIF4G1 subtypes. Methods: The sequences of all the protein subtypes of EIF4G1 were retrieved from NCBI protein database. Based on single parameter evaluation, including hydrophilicity, flexility, antigenicity, the B cell epitopes of the EIF4G1 protein subtypes were predicted using NPS@ structure software and ABCpred software. Results: EIF4G1 protein had five subtypes. The variation of the five different EIF4G1 subtypes was limited within a 300aa region. We identified eight epitopes locating in or near 14-19, 21-27, 52-61, 106-112, 113-139, 183-189, 201-216, and 217-224, which can be used to identify specific B cell epitopes of different protein subtypes. Conclusion: B cell epitopes of EIF4G1 protein subtypes do exist, and they may be used for the protein subtypes evaluation and early diagnosis of tumor patients using artificially-produced matched peptides.

With development of bio-technique, more and more proteins were applied as clinical approaches. However, the protein homogeneity, especially the N-glycosylation limited the further research and application of these protein drugs. The analysis method for N-glycans is believed to be critical in protein drugs development. To enhance the N-glycans isolation efficiency and accelerate the pretreatment, a new strategy was built on ultrafiltration-devices. New methods increased the isolation efficiency of N-glycans containing N-acetylglucosa mine with 10%-20%. The degrading of N-glycans containing sialic acids was also minimized with this method. 20%-100% more N-glycans with sialic acids were isolated. The pretreatment was finished within 30 min. Coupled with HPLC-HRMS, an effective and reliable strategy designed for protein drugs N-glycans analysis were developed.
Glycoproteins ; chemistry ; Glycosylation ; Polysaccharides ; chemistry ; Ultrafiltration ; instrumentation

Objective To define the role of melatonin in the pathogenesis of chickens scoliosis following pinealectomy and constant light irradiation. Methods Ten white leghorn chickens in the control group were kept in light-dark (12h:12h) cycle, 500 lx in daytime and 0-5 lx in nighttime after birth. Pinealectomy was performed in 20 white leghorn chickens when 3-day-old and then kept in light-dark cycle as the control group. Constant light (500 lx) irradiation was used to reduce the secretion of melatonin in 20 chickens after their births. Radiologic examinations were performed on all chicken spines for scoliosis monthly. When the chickens were 3-month-old, their mid-day and mid-night serum samples were collected and analyzed with ELISA kit for melatonin. Results There was no scoliosis in the control group and constant light group when the chickens were 3-month-old. In the pinealectomy group, 4 chickens had obvious scoliosis in the first month when X-ray examination was taken. The curved deformity progressed and became serious when the chickens grew up. There were 7 chickens with severe curved deformity in the second month. When the chickens were 3-month-old, there were totally 11 chickens with scoliosis, Cobb' angle 11?-85?, average 30.63?. The level of melatonin in control group was low in daytime (10.6 pg/ml) and high in nighttime (110.4 pg/ml) alternately. The melatonin level was much lower, daytime 8.4 pg/ml and nighttime 6.9 pg/ml in pinealectomy group and 10.8 pg/ml in constant light group. There was no statistical significance in the serum melatonin between the pinealectomy group and constant light group. Both groups remained low level of serum melatonin. Conclusion Pinealectomy can reduce the secretion of melatonin and induce scoliosis in chickens. Although constant light could suppress the secretion of melatonin in chicken serum, it did not induce scoliosis. The pathogenesis of chickens scoliosis might not be mediated by low-level melatonin.

With development of bio-technique, more and more proteins were applied as clinical approaches. However, the protein homogeneity, especially the N-glycosylation limited the further research and application of these protein drugs. The analysis method for N-glycans is believed to be critical in protein drugs development. To enhance the N-glycans isolation efficiency and accelerate the pretreatment, a new strategy was built on ultrafiltration-devices. New methods increased the isolation efficiency of N-glycans containing N-acetylglucosa mine with 10%-20%. The degrading of N-glycans containing sialic acids was also minimized with this method. 20%-100% more N-glycans with sialic acids were isolated. The pretreatment was finished within 30 min. Coupled with HPLC-HRMS, an effective and reliable strategy designed for protein drugs N-glycans analysis were developed.