张震宇

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27 8月 2019

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Author : 伤口世界

擅长糖尿病足治疗广东药科大学附属第三医院内分泌科主任医师

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The UBR5 protein facilitates mesangial cell hypertrophy and glycolysis induced by high glucose by increasing the phosphorylation levels of AKT 2026-06-12 00:00

Lin Liao1 · Qiming Xu2 · Jie Xu3 · Jie Chen1 · Wenrui Liu1 · Wenhao Chen1 · Yunqing Tang1 · Lianxiang Duan1 · Yue Guo1 · Ziyang Liu1 · Pengyu Tao2 · Yu Cao2 · Jianrao Lu1 · Jing Hu1,4

Received: 14 June 2024 / Accepted: 31 January 2025 / Published online: 13 February 2025 © The Author(s) 2025

Abstract

Aims One of the primary pathological features in the early stages of diabetic nephropathy is mesangial cell (MC) hypertro-phy in the glomerulus. Considering the role of E3 ubiquitin ligases in regulating MC hypertrophy, the aim of this study was to identify the functional ubiquitin protein ligase E3 component N-recognin 5 (UBR5) during MC hypertrophy under high glucose conditions.

Methods Human MCs (HMCs) transduced with UBR5 silencing or overexpression vector were treated with high glucose, AKT inhibitor, or glycolysis inhibitor. Cell proliferation, cell cycle, hypertrophy and glycolysis were evaluated in the HMCs after indicated treatment. m6A methylated RNA immunoprecipitation, luciferase reporter assay, and RNA immunoprecipi-tation were performed to determine the regulation of UBR5 by Wilms tumor 1-associating protein (WTAP)/insulin-like growth factor 2 mRNA-binding protein 1 (IGF2BP1) induced m6A modification. Western blot was performed to determine the protein expression levels.

Results UBR5 expression was upregulated in db/db mice and in high glucose-induced HMCs. UBR5 silencing inhibited high glucose-induced HMC cell cycle arrest, cell hypertrophy, and glycolysis. UBR5 facilitated HMC hypertrophy and gly colysis by promoting the phosphorylation levels of AKT. Additionally, the promoting effect of glycolysis on cell hypertrophy were also elucidated. Further investigation into upstream regulators revealed that WTAP promoted m6A modification of UBR5 through the m6A reader IGF2BP1.

Conclusions Our study unveils a novel mechanism involved in high glucose-induced cell hypertrophy, offering new insights into the understanding and treatment of early pathological mechanisms in diabetic nephropathy.

Keywords High glucose · Hypertrophy · Glycolysis · UBR5, AKT phosphorylation
HbA1c variability as an independent risk factor for diabetic retinopathy: results from a screening program 2026-06-11 00:00

Maria Ida Maiorino1,2 · Carlo Gesualdo3,4 · Silvia Angelino5 · Settimio Rossi3 · Nicole Di Martino2 · Clemente Iodice3,5 · Miriam Longo1,4 · Lorenzo Scappaticcio1,2 · Giuseppe Bellastella1,2 · Francesca Simonelli3 · Katherine Esposito1,2,5

Received: 4 January 2026 / Accepted: 6 May 2026 © The Author(s) 2026

Abstract

Aims To investigate the independent association between long-term glycemic variability, measured as the coefficient of variation (CV) of HbA1c, and the presence of diabetic retinopathy (DR) in a cohort of adults with diabetes within a system-atic eye screening program.

Methods This study screened 379 adults with type 1 and type 2 diabetes. Long-term glycemic variability was calculated as the CV of serial HbA1c measurements. DR was assessed via dilated fundus photography. The association between HbA1c CV and DR was analyzed using multivariable logistic regression adjusting for confounders.

Results DR incidence of 12.4%, mostly mild non-proliferative. The median HbA1c CV was 7.0% (53 mmol/mol). In unad-justed bivariate analysis, the incidence of mild DR was higher in the low- glycemic variability group (CV<5%) compared to the high- glycemic variability group. However, the multivariable logistic regression analysis revealed that higher HbA1c CV was independently associated with the presence of DR (β=0.643, P=0.042), alongside diabetes duration (P<0.001) and age (P<0.001).

Conclusions In conclusion, in a cohort of individuals with both type 1 and type 2 diabetes and a low incidence of DR, long-term glycemic variability, estimated as HbA1c CV, was independently associated with an increased risk of this complication.

Keywords Diabetic retinopathy · Glucose variability · Type 1 diabetes · Type 2 diabetes · Retinopathy screening · HbA1c coefficient of variation
中国人群中面部年轻化治疗专家共识 2026-06-10 00:00

中国整形美容协会面部年轻化分会中国整形美容协会抗衰老分会

中国整形美容协会医美线技术分会

通信作者:李勤,Email:该Email地址已收到反垃圾邮件插件保护。要显示它您需要在浏览器中启用JavaScript。

【摘要】随着年龄的增长,中面部深层脂肪逐渐萎缩,浅层脂肪逐渐移位,眶区、上颌骨逐渐老化,中面部是面部老化最早出现的部位之一,也是实现年轻化外观的重要部位。由中国整形美容协会面部年轻化分会、抗衰老分会、医美线技术分会组织部分专家对中国人群中面部年轻化治疗的诸多问题进行了研讨,并形成共识。主要内容包括,中国人群中面部定义、中面部老化特征及评估方法、常见治疗方式(微创注射技术、光电技术、美塑疗法、埋线技术、脂肪填充、手术治疗)等,并针对中面部不同老化特点采用的联合治疗方案进行了推荐。

【关键词】中面部; 年轻化; 治疗; 专家共识; 中国 DOI:10.3760/cma.j.issn.1671-0290.2020.01.001

中面部是面部老化最早出现的部位之一,是实现年轻化外观的重要部位。近年来,随着大众审美需求的提高,中国美容就医者对中面部年轻化的诉求增多,亟须规范中面部年轻化治疗。为此,由中国整形美容协会面部年轻化分会、抗衰老分会、医美线技术分会组织部分专家,参考中面部年轻化文章,结合现状和专家的经验,制定针对中国人中面部年轻化治疗的专家共识。希望通过共识为优化中国人中面部年轻化治疗提供指导意见,以期推进中面部年轻化治疗的规范管理。

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主任医师、教授、博导，南方医科大学第三附属医院（广东省骨科医院）院长

张震宇

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主任医师、教授、博导，南方医科大学第三附属医院（广东省骨科医院）院长

张震宇

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