2.Oligonucleotide Array Comparative Genomic Hybridization and Its Application
Yi-Fei PENG ; Wen-Li MA ;
China Biotechnology 2006;0(10):-
The array CGH technique (Array Comparative Genome Hybridization) has been developed to detect chromosomal copy number changes on a genome-wide and/or high-resolution scale. It is mainly used in human genetics and oncology. Generally PCR amplified bacterial artificial chromosomes (BACs) or cDNAs have been spotted on the arrays as probes. Recently, however, oligonucleotide arrays designed with more flexibility and provide much higher resolution with high sensitivity, have been successfully explored in stead of BAC array CGH and can save considerable time and efforts. There will be a gradual transition from BAC array CGH to oligonucleotide array CGH in the coming years. The combination of oaCGH and other high-through put analysis can lead to discoveries of a host of novel oncogenes, tumor suppressors as well as tumor drug resistance genes. Some major platforms of oaCGH concerning their spatial resolution, optimal probe length, sensitivity, specificity and application in recent years were compared.
3.Clinical study of combined penetrating keratoplasty with vitreoretinal surgery
Li-Qiang, WANG ; Yi-Fei, HUANG ; Ying, DONG ; Li, LIU
International Eye Science 2005;5(6):1107-1109
AIM: to assess the effectiveness of a combined procedure ( pars plana vitrectomy with temporary keratoprosthesis, vitreoretinal surgery, and penetrating keratoplasty). in the complicated cases and the risk factors for the surgical failure.METHODS: Restrospectively reviewed charts of patients who underwent penetrating keratoplasty in combination with vitreoretinal surgery between 1990 and 2005, with a follow-up of 3mo to 9a. Analysis was focused on ocular history, indications for surgery, visual acuity (VA), anatomic results, and complications.RESULTS: 18 eyes had light perception or VA of hand motions only. The best-corrected VA improved during the first 3mo, increased in 72.2% of all eyes, remained unchanged in 27.78%, and no decreased. In 3 of 18 eyes (16.67%), VA was better than finger counting and hand motions, and nine eyes(50%) showed useful vision (0.05) postoperatively. 10 eyes showed a clear corneal graft (55.56%). 2 eyes needs the second keratoplasty, Bullous corneal edema was evident in 3 eyes, band keratopathy was evident in a 3 eyes. 10 patients were observed for more than 2a;6 had a clear graft (60%). Two eyes (11.11%) had silicone oil-corneal endothelium contact and all of these grafts failed.CONCLUSION: Although the functional outcome of a combined procedure is limited by primary and secondary tissue destruction, preserving ambulatory vision is possible and thus improves the quality of life, at least in patients with single remaining eyes.
8.Study on macular retinal thickness in healthy pregnant women
Guo-Ying, LIU ; Fei, LIU ; Min-Yi, LI
International Eye Science 2014;(10):1873-1875
AIM: To evaluate the physiologic change of retinal thickness during pregnancy.
METHODS:Forty cases ( 80 eyes ) were included two groups:40 eyes ( 20 cases ) in healthy pregnant women group (including in the second and last trimester), and 40 eyes (20 cases) in healthy nonpregnant women group ( control group ) . The macular volume, average thickness, central subfield thickness and retinal thickness of other parafoveal areas were measured by optical coherence tomography scan.
RESULTS: The macular volume was 10. 06±0. 41mm3 and 9. 87±0. 30mm3 in healthy pregnant women group and control group respectively. The average thickness was 279. 43±10. 86μm and 274. 25±8. 07μm in healthy pregnant women group and control group respectively. The central subfield thickness was 235. 15±15. 05μm and 233. 00±15. 81μm in healthy pregnant women group and control group espectively. Statistically significant difference was found in macular volume and average thickness (P<0. 05). The retinal thickness of 8 parafoveal areas in healthy pregnant women group increased comparing with control group, but statistical significance was only found in superior-outer area and inferior-outer area(P<0. 05). OCT images of all cases were normal.
CONCLUSION:The macular retinal thickness increases during pregnancy in the second and last trimester. The physiologic change of retinal thickness should be considered when evaluating pathologic retinal disease of pregnant women.
9.Clinical observation of losantan on hyperuricemia
Zhe-Yi CAI ; Xiu-Li FEI ; Feng WU ;
Chinese Journal of Primary Medicine and Pharmacy 2006;0(10):-
0.05),and losantan was not harmful to the livers and kidneys.Con- clusion There were not only good effect of losantan on curing hyperuricemia,but also it had no bad reactions.
10.DY-1 SUSPENDING RESCUE SEAT ON HELICOPTER
Jinxi NIE ; Shoujin MAO ; Shugui KANG ; Yi FEI ; Songsheng LI ;
Chinese Medical Equipment Journal 1989;0(04):-
DY-1 suspending rescue seat on helicopter is a helicopter-equipped apparatus which is used to rescue flight personnel forced to parachute or landing,or other individual disasters. The thesis briefly introduces the seal s working principle,performances and some experimenting results. It errphasizes on recounting the structure and the condition at operation of the active arm's locking mechanism of the rescue seat's peron fixed ring.