The relationship between choroidal thickness and axis length and corneal curvature in high myopia.

Objectives: To measure choroidal thickness (CT) in highly myopia eyes using enhanced depth imaging spectral-domain optical tomography (EDI SD-OCT) and explore the relationship between the CT and axial length (AL) and corneal curvature. Methods: This study assessed 66 eyes of 33 patients with both eyes of high myopia (equivalent sphericity ≥-6D or AL≥26mm) who underwent treatment at the department of ophthalmology, fourth hospital of Hebei Medical University from August 2020 to August 2021(High-myopia group). The control group included 54 eyes from 27 healthy volunteers. The patients in the two groups were 18~40 years old. EDI SD-OCT was used to measure the CT of subfoveal choroidal thickness (SFCT) and CT from fovea to nasal and temporal sides at an interval of 500~2500µm. The intraocular pressure, diopter, ocular axis, corneal curvature, and CT were compared between the two groups. The correlation between CT, diopter and AL was measured by Pearson's r. Results: The diopter, AL, vertical corneal curvature, and CT in the high-myopia group were significantly higher than those in the control group (P<0.05). There was significant correlation between SFCT and AL in both groups (P<0.05). There was a negative correlation between AL and CT in high-myopia group (r=-0.395, P<0.05), and a positive correlation between AL and CT in control group (r=0.29, P<0.05). There was a weak correlation between AL and gender, intraocular pressure, and horizontal corneal curvature(P<0.05), and a negative correlation between AL and diopter (r=-0.861, P<0.001). Conclusion: EDI SD-OCT can quantitatively measure the CT of high myopia. The CT of patients with high myopia was significantly thinner than that of the control group of the same age. There was a significant correlation between diopter, AL and CT, suggesting that AL is a parameter indicating the degree of myopia, and the change of CT may play a role in the occurrence and development of high myopia.

Sequence polymorphisms in the D-loop region of mitochondrial DNA and outcome of non-Hodgkin lymphoma.

Accumulation of single nucleotide polymorphisms (SNPs) in the displacement loop (D-loop) of mitochondrial DNA (mtDNA) might be associated with cancer risk and disease outcome. We have identified 140 SNPs including 26 SNPs with frequency distribution of minor allele greater than 5% in a case-control study for non-Hodgkin lymphoma patients previously. In this study, we assessed the predictive power of D-loop SNPs in NHL patients. Five SNP sites were identified by log-rank test for statistically significant prediction of NHL survival in a univariate analysis. In an overall multivariate analysis, allele 16304 was identified as an independent predictor of NHL outcome. The survival time of NHL patients with 16304C was significantly shorter than that of patients with 16304T (relative risk, 0.513; 95% CI, 0.266-0.989; p = 0.046). The analysis of genetic polymorphisms in the mitochondrial D-loop can help identify subgroups of patients who are at a high risk of a poor disease outcome.

Prognostic value of microRNA 502 binding site SNP in the 3'-untranslated region of the SET8 gene in patients with non-Hodgkin's lymphoma.

AIMS AND BACKGROUND: A number of important cancer-associated covalent modifications of histone genes can be regulated by microRNAs (miRNAs) that bind to their target sites in the 3'-untranslated regions. We evaluated the effect of single-nucleotide polymorphisms (SNPs) at the miR-502 binding site in the 3'-untranslated region of the SET8 gene on the clinical outcome of non-Hodgkin's lymphomas (NHL). METHODS AND STUDY DESIGN: The miR-502 binding site SNP of rs16917496 in the 3'-untranslated region of SET8 was genotyped with the ligation detection reaction method. The association of rs16917496 with NHL survival was calculated with the log-rank test using the Kaplan-Meier method. Multivariate survival analysis was performed using a Cox proportional hazards model. RESULTS: Patients carrying the rs16917496 CC genotype had a significantly longer survival time than patients carrying the CT genotype (P = 0.043) or TT genotype (P = 0.086). In addition, rs16917496 was associated independently with the survival of NHL patients in multivariate analysis (CC vs TT, 95% CI: 1.021-3.279, RR: 1.829, P = 0.043; CC vs CT, 95% CI: 1.026-3.339, RR: 1.851, P = 0.041). The association of rs16917496 with NHL survival was further identified in the peripheral T cell lymphoma (pTCL) subtype of NHL at borderline statistically significant levels (P = 0.069). CONCLUSION: Our study provides evidence that the SNP in the miRNA binding site of the SET8 3'-untranslated region seems to influence survival of NHL. It may have possible prognostic and survival value in the clinic.

Primary giant lymphoma of the right thigh: A case report and brief review of the literature.

Primary soft tissue non-Hodgkin lymphoma (NHL) of the extremities is very rare. The clinical features of NHL mimic those of other soft tissue tumors, particularly sarcoma; however, they should be differentiated, as the treatment and prognosis are completely different. In this study, the case of a 68-year-old female with a giant mass, movement disorder, numbness and painful sensations in the right thigh is presented. Magnetic resonance (MR) imaging revealed a huge circle-shaped mass. Fine needle aspiration cytology (FNAC) of the tumor demonstrated neoplastic small, round cells. The tentative diagnosis was of a mesenchymal sarcoma. The right thigh was amputated. On histological examination of the amputated extremity, the diagnosis was found to be large B cell lymphoma. Primary soft tissue NHL of the extremities is a systemic malignant disease and is sensitive to chemo-therapy and radiotherapy. The histological diagnosis should be identified as far as possible before the tumor is widely excised.

Matrix metalloproteinase-2 promoter and tissue inhibitor of metalloproteinase-2 gene polymorphisms in non-Hodgkin's lymphoma.

Single nucleotide polymorphisms in the promoter regions of matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinase (TIMP) genes are associated with an adverse outcome in some cancers. We examined three polymorphisms: -1306C/T and -735C/T in MMP-2 and -418G/C in the TIMP-2 gene, using chain reaction restriction fragment length polymorphism typing analysis in 575 patients with non-Hodgkin's lymphoma (NHL). We examined the possible correlations between the three polymorphisms (MMP-2 (-1306C/T and -735C/T) and TIMP-2 gene (-418G/C)) and the clinical significance and survival rate in patients with NHL. The incidence of the CT, TT+CT genotypes and T allele of -735C/T was significantly higher in stage III and IV patients compared to stage I and II patients. In cases with bone marrow infiltration, the TT genotypes of the -1306C/T gene were significantly less frequent compared to CC genotypes. The CT, TT and CT+TT genotypes and T allele in patients exhibiting the -1306C/T polymorphism were significantly less frequent in patients with a large tumor size compared to a smaller tumor. The TT genotypes of the -735C/T polymorphism were more common in patients with a large tumor compared to those with a smaller tumor. The frequency of the -1306C/-735T haplotype in patients with a smaller tumor size was significantly higher compared to patients with a large tumor. The -1306T/-735C and -1306C/-735C haplotypes were significantly less frequent in patients with B-symptoms compared to those without. Interestingly, patients with the -735CT genotype exhibited a lower rate of survival. Our results demonstrate that certain MMP-2 and TIMP-2 gene polymorphisms potentially effect the progression or assessment of prognosis for NHL. This research warrants further, larger scale studies.