Objective To investigate the change of wave-front aberrations after Ortho-K contact lens(CL)by day and overnight wear.Design Retrospective case series.Participant 180 eyes of 92 myopic patients wearing Ortho-K CL.Method Wave-front aberra- tions of 180 eyes of 92 myopic patients wearing Ortho-K CL were analyzed.Patients were divided into by day wear and overnight wear groups.Wave-front aberrations were measured with WFA 1000B subjective aberrometer before and 1 month after Ortho-K CL wear. Wave-front aberrations at initial,after one month of CL fitting and without CL were measured in same condition,and RMS values for overall wave-front aberrations and each order of the Zernike aberrations were analyzed with Matlab software.Main Outcome Measures RMS value of Zernike coefficient of each order.Result Compared with initial aberration in wear by day group,total RMS and each or- der aberrations(except 2nd order)with lens fitting significantly increased(P0.05).Compared with initial aberration in overnight wear group,overall wavefront aberrations and the RMS(except 2nd,3rd and 6th order Zernike aberrations)with lens fitting significantly increased(P0.05).Conclusion The high order aberrations with lens fitting and without lens fit- ting increased in each group.The aberration with lens fitting in wear by day group was higher than that in overnight wear group,while the aberration without lens fitting in overnight wear group was higher than that in wear by day group.(Ophthalmol CHN,2007,16: 351-354)

Female ; Humans ; Hypothyroidism ; drug therapy ; Infant, Newborn ; Thyroxine ; poisoning ; therapeutic use

The technique of double-layered plate was developed for screening the library of mutant endoglucanase III from Trichoderma reesei generated by the method of directed evolution.The enzyme activity was determined according to the velocity of the formation of halos on the plates.Several mutants with higher activity than the wild type at low temperature or alkaline pH were obtained by using this strategy under different screening conditions.Further results of spectrophotometric determination of the activities of these mutants were consistent with the results of plate screening.The establishment of such strategy will broaden the applications of the directed evolution methods for improving the existing proteins to obtain useful enzymes with new properties for industrial applications.

The study aims to characterize and compare interferon reference standards from 5 manufacturers. By testing molecular mass and trypsin-digested peptide mass mapping, the amino acid sequence was verified and post-translational modifications such as disulfide bond were identified. Results show that the molecular mass and amino acid sequence were consistent with theory; the disulfide bonds of 4 lots of interferon were Cys1-Cys98/Cys29-Cys138, 1 lot was Cys29-Cys139/Cys86-Cys99; N-terminal "+Met", acetyl N-terminal and Met oxidation were identified in part of the sample. UPLC-MS can be used to characterize and compare interferon reference standards from different manufacturers.
Amino Acid Sequence ; Chromatography, High Pressure Liquid ; methods ; Interferons ; standards ; Mass Spectrometry ; methods ; Molecular Weight ; Oxidation-Reduction ; Peptide Mapping ; Protein Processing, Post-Translational ; Reference Standards

Abortion, Missed ; chemically induced ; Adult ; Carbon Disulfide ; adverse effects ; Female ; Humans ; Occupational Exposure ; adverse effects ; Pregnancy ; Retrospective Studies ; Risk Factors ; Time Factors

Adenocarcinoma, Clear Cell ; pathology ; Ethmoid Sinus ; Humans ; Kidney Neoplasms ; pathology ; Male ; Middle Aged ; Neoplasm Metastasis ; Paranasal Sinus Neoplasms ; secondary

Objective　To explore the correlation between the expression of p33/ING1 and the clinicopathological features in patients with colorectal cancer, and to understand the possible mechanism of p33/ING1 in the oncogenesis of colorectal neoplasms. Methods　All samples of normal mucosa and cancer tissues from 52 patients with colorectal cancer were detected for their expression levels of p33/ING1 by RT-PCR. Results　A significant decrease in p33/ING1 mRNA expression was found in 30 out of 52(57.7%) colorectal cancer tissues. The results also showed that repression of p33/ING1 expression markedly related to both the Duke's stage and metastasis. Conclusion　Down-regulation of p33/ING1 may play an important role in the oncogenesis and development of colorectal carcinoma.

Objective To study the effects of granisetron hydrochloride on vasovagal syncope(VVS) in rabbits.Methods Twenty-four healthy New Zealand rabbits were divided stochastically into control group and intervention group,12 in each group. The control group was injected intravenously with normal saline. The intervention group was injected intravenously with granisetron hydrchloiride.Rabbit VVS models were established,each was taken at 4 points in time in the bloodletting process:T1,T2,T3,T4,to compare the bloodletting time,the concentration of 5-hydroxytryptamine(5-HT) in T2,T3,T4 and the total blood volume between the groups,and monitor the heart rate, blood pressure during the entire process.Results 1.The time of intervention group in T2,T3,T4 was longer than the time of control group obviously(P

Objective To investigate the effects of rigid gas permeable contact lens (RGPCL) wearing 3 years on ocular surface in keratoconus.Design Retrospective case series.Participants 73 patients with keratoconus.Methods From July 2001 to July 2004,73 patients (142 eyes) wearing RGPCL for more than 3 years were collected in Peking University Optometry & Ophthalmology Center.Be- fore and at 1 year,2 years and 3 years of RGPCL wearing,density and morphologic changes of corneal endothelium were examined with non-contact specular microscope.Eye axial length,central and peripheral thickness of cornea were measured with A-scan pachymeter. All eyes were examined with slit-lamp microscope periodically.Main Outcome Measures Corneal endothelial density and morphology, corneal thickness,eye axial length,ocular surface changes.Results Before and at 1 year,2 years and 3 years of RGPCL wearing,aver- age corneal endothelial density was 2901.92?445.20,2862.78?497.13,2854.71?526.80,3015.61?421.22 (cells/mm~2)without significant difference statistically (F=1.571,P=0.20).Morphologic changes were not significant during 3 years.Eye axial length was 25.15?1.50, 24.93?1.36,24.78?1.25,25.39?1.31 (mm) without significant difference statistically (F=2.218,P=0.10).Corneal central thickness was 489.09?59.64,484.02?60.80,496.61?59.74,487.44?54.25(?m)without significant difference statistically (F=0.991,P=0.40).Peripheral thickness changes were also not significant statistically during 3 years.69 eyes with mild conjunctival congestion,12 eyes with corneal fluorescence stain and 6 eyes with corneal epithelial rough were found with slit-lamp microscope during follow-up.Conclusions For the patients with keratoconus,long term of RGPCL wear will not lead to significant ocular changes or severe ocular complications.

Objective:To investigate the effect of staphylococcus aureus on expressions of inducible nitric oxide synthase (iNOS) and interleukin-1 beta (IL-1β) in THP-1 monocytes under high glucose concentrations. Methods:THP- 1 monocytes were incubated at different surroundings with 2×2 factorial design. There were 4 experimental groups in the study, which were analyzed by univariate analysis of variance. The total RNA was distilled. The expressions of iNOS and IL-1β were examined by SQ-RT-PCR. Results:The expressions of iNOS and IL-1β were affected by high glucose concentration, bacteria and both of them together in THP-1 monocytes. The expressions of iNOS and IL-1β were weakened in high glucose concentration compared with that of control(P < 0.01). The expressions of iNOS and IL-1β were weakened in the high glucose concentration and bacterial infection compared with that of the high glucose concentration only(P < 0.01). The expressions of iNOS and IL-1β increased in bacterial infection compared with that of control(P < 0.01). The expression of IL-1β increased in high glucose concentration and bacterial infection compared with that of the high glucose concentration only(P < 0.01) but the expression of iNOS was not distinct. Conclusion:When staphylococcus aureus infected monocytes, the expressions of iNOS and IL-1β were weakened in high glucose concentration, which suggested that the depressed function of immunocyte was related with high glucose concentration.