TCERG1L hypermethylation is a risk factor of diabetic retinopathy in Chinese children with type 1 diabetes

●AIM:To identify the differential methylation sites(DMS)and their according genes associated with diabetic retinopathy(DR)development in type 1 diabetes(T1DM)children.●METHODS:This study consists of two surveys.A total of 40 T1DM children was included in the first survey.Because no participant has DR,retina thinning was used as a surrogate indicator for DR.The lowest 25%participants with the thinnest macular retinal thickness were included into the case group,and the others were controls.The DNA methylation status was assessed by the Illumina methylation 850K array BeadChip assay,and compared between the case and control groups.Four DMS with a potential role in diabetes were identified.The second survey included 27 T1DM children,among which four had DR.The methylation patterns of the four DMS identified by 850K were compared between participants with and without DR by pyrosequencing.●RESULTS:In the first survey,the 850K array revealed 751 sites significantly and differentially methylated in the case group comparing with the controls(|Δβ|>0.1 and Adj.P<0.05),and 328 of these were identified with a significance of Adj.P<0.01.Among these,319 CpG sites were hypermethylated and 432 were hypomethylated in the case group relative to the controls.Pyrosequencing revealed that the transcription elongation regulator 1 like(TCERG1L,cg07684215)gene was hypermethylated in the four T1DM children with DR(P=0.018),which was consistent with the result from the first survey.The methylation status of the other three DMS(cg26389052,cg25192647,and cg05413694)showed no difference(all P>0.05)between participants with and without DR.●CONCLUSION:The hypermethylation of the TCERG1L gene is a risk factor for DR development in Chinese children with T1DM.

配戴角膜塑形镜后调节幅度的改变及其控制近视进展的临床观察

目的:观察和分析配戴角膜塑形镜后调节幅度、眼轴的改变,探讨配戴角膜塑形镜延缓近视进展的机制。方法:前瞻性研究。收集2018-05/2019-08至我院治疗的7~14岁中低度青少年近视患者215例。行全面眼科检查后,根据检查结果、患者及家长依从性等综合评估,其中113例患者配戴角膜塑形镜,102例患者配戴框架眼镜。配戴期间规律复诊,测量角膜塑形镜组戴镜前,戴镜后1、3、6mo,1a时的调节幅度及1a后两组眼轴的改变。结果:随访1a后,角膜塑形镜组共100例100眼完成随访,13例13眼失访。框架眼镜组共77例77眼完成随访,25例25眼失访。配戴角膜塑形镜前,患者调节幅度为13.57±2.47D,戴镜后1、3、6mo,1a后调节幅度均较戴镜前显著提高(均P<0.005),调节幅度在戴镜6mo时达到峰值,戴镜1a(15.44±2.35D)较戴镜6mo(15.74±2.32D)略有下降。配戴角膜塑形镜1a后眼轴增长明显小于框架眼镜组(0.13±0.15 vs 0.50±0.28mm,P<0.001)。结论:中低度青少年近视患者在配戴角膜塑形镜后伴有调节幅度的提高。配戴角膜塑形镜能够控制眼轴的增长,是目前较为有效地延缓青少年近视进展的方法之一。

Responsiveness and minimal clinically important difference of the Chinese version of the Low Vision Quality of Life Questionnaire after cataract surgery

AIM: To investigate the Chinese version of the Low Vision Quality of Life Questionnaire(CLVQOL) as an instrument for obtaining clinically important changes after cataract surgery.METHODS: Patients underwent cataract surgery in Shanghai General Hospital, Shanghai Jiao Tong University, who fit the inclusion criteria were recruited. Two CLVQOLs were administered, including a preoperative CLVQOL and a CLVQOL at the end of the 3 mo follow-up period, and were completed using face-to-face interviews or phone interviews conducted by trained investigators. The minimal clinically important difference(MCID) was calculated using an anchor-based method and a distribution method. In addition, the responsiveness of the questionnaire was measured.RESULTS: A total of 155 residents were enrolled. The average visual acuity(VA) preoperatively was 0.08(SD=0.05), and it increased to 0.47(SD=0.28) at the end of followup. Statistically significant positive changes in the CLVQOL scores indicated significant improvement of vision related quality of life after cataract surgery. With the larger value between the two results as the final value, the MCID values of the CLVQOL(scores of the four scales as well as the total score) were 8.94, 2.61, 4.34, 3.10 and 17.63, respectively. The CLVQOL has both good internal and external responsiveness.CONCLUSION: CLVQOL scores are appropriate instruments for obtaining clinically important changes after cataract surgery. This study is an effective exploration for establishingcataract surgery efficacy standards, which helps clinical and scientific research workers in ophthalmology to gain a more in-depth understanding when using CLVQOL.

Macular choroidal thickness in Chinese preschool children: decrease with axial length but no evident change with age

AIM: To explore the distribution pattern of macular choroidal thickness(ChT) and its association with age as well as refractive status in Chinese preschoolers.METHODS: School-based, cross-sectional study. A total of 550 healthy preschool children aged 3 to 6 years old from 6 kindergartens were enrolled. Comprehensive ocular examinations, including measurement of visual acuity, axial length, intraocular pressure and slit-lamp examination before cycloplegia, as well as refraction measurement and sweptsource optical coherence tomography(SS-OCT) examination after cycloplegia, were performed. The macular ChT in each sector of the ETDRS grid was measured by the builtin software of SS-OCT.RESULTS: The mean central ChT of the participants was 312±59 μm. The mean axial length and spherical equivalent refraction were 22.36±0.72 mm and 1.51±0.83 D, respectively. Axial length increased with age(P<0.001), while the spherical equivalent refraction was similar among different age groups. Similarly, no significant difference was observed in ChT in all sectors among different age groups(all P>0.05). The central ChT of 3-4, 5 and 6 years old children was 314±59 μm, 312±60 μm and 312±59 μm, respectively(P=0.920). No difference was observed in ChT in most of the sectors between genders. No statistical significant difference was observed among different refractive groups(all P>0.05), though the ChT of each sector seemed to be smaller in myopic children. Axial length and weight were the independent factors of central Ch T. Children with longer axial length(β=-21.184, P<0.001) and smaller weight(β=1.502, P=0.041) tended to have thinner choroid.CONCLUSION: In preschool children, the ChT remains relatively stable with age, while a negative association between ChT and axial length existed. This will be helpful to elucidate the characteristics of ChT during the early refractive development.

Photopic pupil size change in myopic orthokeratology and its influence on axial length elongation

AIM:To explore the photopic pupil size behavior in myopic children undergoing overnight orthokeratology(ortho-k)over 1-year period and its effects on the axial elongation.METHODS:A total of 202 Chinese myopic children were enrolled in this prospective clinical trial.Ninetyfive subjects in ortho-k group and eighty-eight subjects in spectacle group completed the 1-year study.Axial length(AL)was measured before enrollment and every 6mo after the start of ortho-k.The photopic pupil diameter(PPD)was determined using the Pentacam AXL and measured in an examination room with lighting of 300-310 Lx.Stepwise multiple linear regression analysis was used to identify variables contribution to axial elongation.RESULTS:Compared with spectacle group,the average 1-year axial elongation was significantly slower in the ortho-k group(0.25±0.27 vs 0.44±0.23 mm,P<0.0001).In ortho-k group,PPDs significantly decreased from 4.21±0.62 mm to 3.94±0.53 mm after 1mo of lens wear(P=0.001,Bonferroni correction)and the change lasts for 3-month visit.No significantly change during the other follow-up visits was found(P>0.05,Bonferroni correction).The 4.81 mm PPD may be a possible cutoff point in the ortho-k group.Subjects with PPD below or equal to 4.81 mm tended to have smaller axial elongation compared to subjects with PPD above 4.81 mm after 1-year period(t=-3.09,P=0.003).In ortho-k group,univariate analyses indicated that those with older age,greater degree of myopia,longer AL,smaller baseline PPD(PPDbaseline)experienced a smaller change in AL.In multivariate analyses,older age,greater AL and smaller PPDbaseline were associated with smaller increases in AL.In spectacle group,PPD tended to be stable(P>0.05,Bonferroni correction)and did not affect axial growth.CONCLUSION:PPDs experience significantly decreases at 1-month and 3-month ortho-k treatment.Children with smaller PPD tend to experience slower axial elongation and may benefit more from ortho-k.

Prevalence and risk factors of diabetic retinopathy in patients with type 2 diabetes in Shanghai

AIM:To investigate the prevalence of diabetic retinopathy(DR)in residents of Shanghai and analyze the risk factors of DR.METHODS:This study involved 7233 patients with diabetes in 2016.The demographic data of the participants were collected using a questionnaire survey.Physical examination,laboratory tests,and ophthalmological examinations were conducted.Two professional ophthalmologists diagnosed and graded DR by fundus examination and then combined the results with fundus images.The unconditional multivariate Logistic regression analysis was used to determine the risk factors.RESULTS:In total,6978 patients with type 2 diabetes in Shanghai with a mean age of 68.33±8.40 y were recruited,including 2975 males(42.6%)and 4003 females(57.4%).Overall,1184 patients were diagnosed with DR,with a prevalence rate of 16.97%.Regression analysis showed that duration of diabetes(OR 1.061,95%CI 1.049-1.073),high systolic blood pressure(SBP;OR 1.071,95%CI 1.037-1.106),increased glycosylated hemoglobin level(OR 1.234,95%CI 1.162-1.311),high blood glucose level(OR 1.061,95%CI 1.023-1.099),increased neutrophil-to-lymphocyte ratio(NLR;OR 1.132,95%CI 1.053-1.217)and mean platelet volume(MPV;OR 1.077,95%CI 1.016-1.142)were risk factors of DR.Conversely,hematocrit(HCT;OR 0.971,95%CI 0.954-0.988)and mean corpuscular volume(MCV;OR 0.980,95%CI 0.965-0.994)were protective factors.CONCLUSION:The prevalence rate of DR in Shanghai is 16.97%.The duration of diabetes,high SBP,increased glycosylated hemoglobin,NLR,and MPV were determined as risk factors of DR.