ABSTRACT
Epiretinal membrane (ERM) is a relatively common macular disease that forms along the surface of the internal limiting membrane (ILM) of the retina to some reason.The pathogenesis is not clear.Microincision vitrectomy surgery has been confirmed as a minimally invasive and very safe modality of treatment.Deciding when to perform a vitrectomy can be difficult.There are many factors which can affect the postoperative visual acuity,such as age,the thickness of macular,integrity of photoreceptor inner segment/outer segment (IS/OS) junction.
ABSTRACT
<p><b>OBJECTIVE</b>To explore the relationship between polymorphisms of interleukin-4 (IL-4) gene (-33, +45, VNTR, +429, +448) and the susceptibility of silicosis.</p><p><b>METHODS</b>In a case-control study, the case group consisted of 101 patients with silicosis, and was matched with the control group (121 workers without silicosis), according to the age, sex, nationality, working place, exposure to dust. The polymorphisms of IL-4 (five locus) detected by the method of polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) techniques.</p><p><b>RESULTS</b>There was no difference of age, exposure and smoking between case group and control group (P > 0.05). The two groups had good comparability. Only the GA genotype in the IL-4 (+429) locus was found, the genotypes of AA and GG were not found. The CC genotype in the IL-4 (+448) locus was found, the genotypes of CG and GG were not found. The frequencies of AA, GG and AG of IL-4 (+45) locus in the case and control groups were 55.4%, 10.9%, 33.7% and 62.0%, 11.6%, 26.4%, respectively, there was no the significant difference between case and control groups (P > 0.05). The frequencies of B1B1, B2B2 and B1B2 of IL-4 (VNTR) locus in the case and control groups were 73.3%, 1.0%, 25.7% and 68.6%, 1.7%, 29.8%, respectively, there was no the significant difference between case and control groups (P > 0.05). The frequencies of TT, CC and CT in IL-4 -33 locus in the case group were 55.4%, 11.9% and 32.7%, which were significantly higher than those (69.4%, 4.1%, 26.4%) in control group (P < 0.05).</p><p><b>CONCLUSIONS</b>There was no relationship between IL-4 (+45, VNTR) genotypes and prevalence of silicosis in this study. The polymorphisms of IL-4 (+448) site were not found which may be related to the race. The relationship between genetic polymorphism of IL-4 (-33) locus and silicosis development was found, Workers with IL-4 (-33) allele C are susceptible to the silica.</p>
Subject(s)
Aged , Aged, 80 and over , Humans , Male , Middle Aged , Alleles , Asian People , Genetics , Case-Control Studies , Gene Frequency , Genetic Predisposition to Disease , Genotype , Interleukin-4 , Genetics , Polymorphism, Single Nucleotide , Silicosis , Epidemiology , GeneticsABSTRACT
<p><b>OBJECTIVE</b>To explore the relationship between polymorphisms of interleukin-4 (IL-4) gene (-33, +45, intron3, +429, +448) and the susceptibility of silicosis.</p><p><b>METHODS</b>A case-control study was carried out. 101 silicosis patients were selected as cases. As strictly matching, 121 of non silicosis workers were selected as the controls. The polymophisms of IL-4 (five locus) were detected by the method of polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) techniques.</p><p><b>RESULTS</b>The GA genotype in the IL-4+429 locus and the CC genotype in the IL-4+448 locus were found. The frequencies of AA, GG and AG of IL-4+45 locus in the cases were 55.4%, 10.9%, and 33.7% and in the controls were 62.0%, 11.6%, and 26.4%. The differences between cases and controls were not significant. The frequencies of B1B1, B2B2, and B1B2 of intron3 VNTR locus in the cases were 73.3%, 1.0%, and 25.7% and in the controls were 68.6%, 1.7%, and 29.8%. The differences were not significant. The frequencies of TT, CC, and CT in -33 locus in the cases were 55.4%, 11.9%, and 32.7% and in the controls were 69.4%, 4.1%, and 26.4%. The differences were significant (P=0.034).</p><p><b>CONCLUSION</b>The relationship between genetic polymorphism of IL-4-33 site and silicosis has been found and -33TT is a protective genotype for silicosis.</p>