Changes of TGF-β2, MMP-2, and TIMP-2 levels in the vitreous of patients with high myopia

Purpose

To investigate the concentrations of transforming growth factor (TGF)-β2, matrix metalloproteinase (MMP)-2, and tissue inhibitor of metalloproteinase (TIMP)-2 in the vitreous of patients with high myopia.

Methods

Twenty-six patients with high myopia (HM) who received vitrectomy for macular retinoschisis or macular hole were enrolled in this prospective study. Twenty-six patients with idiopathic macular hole or macular epiretinal membrane were chosen as a control group. Vitreous samples were obtained during the vitrectomy surgery. The levels of TGF-β2、MMP-2、TIMP-2 in the vitreous samples were measured by enzyme-linked immunosorbent assay. The MMP activity was determined by a fluorometric assay.

Results

There was no significant difference in the vitreous level of TGF-β2 between HM (1.64?±?0.38 ng/ml) and the control group (1.56?±?0.32 ng/ml, p?=?0.56). The vitreous levels of MMP-2 in HM (32.40?±?14.90 ng/ml) were significantly higher than in the control group (21.42?±?6.74 ng/ml, p?MMP-2/TIMP-2 was significantly elevated in the vitreous samples from HM (0.61?±?0.19), compared to the control group (0.48?±?0.11, p?p?Conclusions The elevated MMP/TIMP ratio and MMP activity may play a role in the pathogenesis of human high myopia. Large prospective studies are needed to further investigate the effect of MMPs in the pathogenesis of human high myopia.     

脂联素在子痫前期患者胎盘组织中的表达与其发病的关系

目的 探讨脂联素在子痫前期患者胎盘组织中的表达与其发病的关系.方法 采用免疫组化链霉菌抗生物蛋白-过氧化物连接(SP)法及RT-PCR技术,检测20例正常足月妊娠孕妇(正常妊娠组)、12例轻度子痫前期(轻度子痫前期组)及22例重度子痫前期(重度子痫前期组)患者胎盘组织中脂联素蛋白及其mRNA的表达,并分析其与子痫前期发病的关系.结果 (1)3组孕妇胎盘绒毛合体滋养细胞及细胞滋养细胞胞质内脂联素蛋白均呈阳性表达,且各组内胎盘母面及子面脂联素蛋白的表达水平相互比较,差异均无统计学意义(P＞0.05).(2)重度子痫前期组胎盘组织中脂联素蛋白的表达水平(30 984±14 604)低于轻度子痫前期组(58 360±8910)及正常妊娠组(53 246±17 554),差异均有统计学意义(P＜0.01).重度子痫前期组中妊娠足月者胎盘组织中脂联素蛋白的表达水平(38 890±20 386)与未足月者(29 319±8997)比较,差异无统计学意义(P＞0.05);但与正常妊娠组比较,差异有统计学意义(P＜0.05).(3)3组孕妇胎盘组织中均有脂联素mRNA的表达.其中重度子痫前期组胎盘组织中脂联素mRNA表达水平(1.0±0.2)低于轻度子痫前期组(2.9±0.8)及正常妊娠组(3.3±1.1),差异有统计学意义(P＜0.05).结论 重度子痫前期患者胎盘组织中脂联素mRNA表达水平下降导致其蛋白表达水平也下降,提示脂联素的异常表达参与了子痫前期的发病.     

TGF-β_1在PCOS卵巢间质纤维化形成中的作用

目的:探讨TGF-β1在PCOS大鼠卵巢间质纤维化、包膜硬化形成中的作用。方法:利用脱氢表雄酮(DHEA)皮下注射的方法建立PCOS病理模型大鼠20只,用微粒子酶免分析法测定血清性激素E2、T、LH、FSH、LH/FSH、空腹胰岛素(FINS)水平,及光镜下观察PCOS大鼠卵巢的病理结构,透射电镜观察细胞超微结构来验证模型。采用免疫组化法检测PCOS组(n=20)卵巢细胞因子TGF-β1的表达,并与20只正常大鼠相比照。结果:TGF-β1在PCOS组各阶段卵泡卵母细胞、颗粒细胞的表达强度与对照组相比,差异无统计学意义(P>0.05)。而在窦状卵泡膜细胞和卵巢间质细胞中的表达,PCOS组显著高于对照组(P<0.01,P<0.05)。结论:多囊卵巢中TGF-β1表达异常,可能是导致多囊卵巢间质纤维化、包膜增厚的原因之一,TGF-β1也参与PCOS卵泡发育、闭锁的调控。     

掌叶半夏超临界CO_2乙醇萃取物的抗惊厥作用(英文)

目的研究掌叶半夏超临界CO2乙醇萃取物(SEE-CO2 PP)对青霉素诱发惊厥的对抗作用。方法采用大鼠皮质局部定位注射青霉素诱发惊厥模型,研究SEE-CO2 PP对惊厥发作的潜伏期以及惊厥行为变化的影响,并用RM6240C型多道生理信号采集处理仪记录皮质和海马痫性放电的潜伏期、频率和痫波最高发放波幅,同时应用高效液相色谱法测定海马谷氨酸(Glu)、天冬氨酸(Asp)、甘氨酸(Gly)和γ-氨基丁酸(GABA)递质的含量。结果 SEE-CO2 PP 15和30 g·kg-1(ig)可延长青霉素诱发惊厥的潜伏期,并减弱发作强度。SEE-CO2PP能够延长痫性放电的潜伏期,减少痫性放电的频率,减小皮质和海马发放痫波的最高波幅,同时,SEE-CO2PP可以增加海马GABA的水平,对Gly,Asp和Glu水平无明显影响。结论 SEE-CO2PP可对抗青霉素诱发的惊厥行为和痫样放电,具有抗惊厥作用。     

乌索酸诱导K562/DNR细胞凋亡的实验研究

目的通过体外细胞实验,证实乌索酸对柔红霉素(DNR)诱导的K562耐药细胞株(K562/DNR)有细胞毒和诱导凋亡作用,并摸索出作用的最佳浓度和时间,为乌索酸治疗血液系统恶性肿瘤奠定理论基础。方法利用WST-8分析,研究不同浓度和作用时间的乌索酸对K562/DNR细胞的体外细胞毒作用情况;利用流式细胞仪技术,研究不同浓度和作用时间的乌索酸诱导K562/DNR细胞凋亡的情况。结果乌索酸对K562/DNR细胞增殖具有明显抑制作用,诱导凋亡作用亦显著,并呈现一定的时间、浓度依赖性。结论乌索酸对于K562/DNR细胞具有确切的抗肿瘤活性。     

Functional Fiber Reduces Mice Obesity by Regulating Intestinal Microbiota

Obesity may cause metabolic syndrome and has become a global public health problem, and dietary fibers (DF) could alleviate obesity and metabolic syndrome by regulating intestinal microbiota. We developed a functional fiber (FF) with a synthetic mixture of polysaccharides, high viscosity, water-binding capacity, swelling capacity, and fermentability. This study aimed to investigate the effect of FF on obesity and to determine its prevention of obesity by modulating the gut microbiota. Physiological, histological, and biochemical parameters, and gut microbiota composition were investigated in the following six groups: control group (Con), high-fat diet group (HFD), low-fat diet group (LFD, conversion of HFD to LFD), high-fat +8% FF group (8% FF), high-fat +12% FF group (12% FF), and high-fat +12% FF + antibiotic group (12% FF + AB). The results demonstrated that 12% FF could promote a reduction in body weight and epididymal adipocyte area, augment insulin sensitivity, and stimulate heat production from brown adipose tissue (BAT) (p < 0.05). Compared with the HFD, 12% FF could also significantly improve the intestinal morphological integrity, attenuate systemic inflammation, promote intestinal microbiota homeostasis, and stabilize the production of short-chain fatty acids (SCFAs) (p < 0.05). Consistent with the results of 12% FF, the LFD could significantly reduce the body weight and epididymal adipocyte area relative to the HFD (p < 0.05), but the LFD and HFD showed no significant difference (p > 0.05) in the level of inflammation and SCFAs. Meanwhile, 12% FF supplementation showed an increase (p < 0.05) in the abundance of the Bifidobacterium, Lactococcus, and Coprococcus genus in the intestine, which had a negative correlation with obesity and insulin resistance. Additionally, the treatment with antibiotics (12% FF + AB) could inhibit the effect of FF in the HFD. The Kyoto Encyclopedia of Genes and Genomes (KEGG) function prediction revealed that 12% FF could significantly inhibit the cyanogenic amino acid metabolic pathway and decrease the serum succinate concentration relative to the HFD group. The overall results indicate that 12% FF has the potential to reduce obesity through the beneficial regulation of the gut microbiota and metabolites.     

围绝经期综合征患者心率变异性与中医辨证分型关系的探索

目的研究心率变异性(HRV)与围绝经期综合征中医辨证分型的关系,探索中医证的客观化。方法通过对87例围绝经期综合征患者与32例正常对照组HRV的频域分析,观察、分析肝肾阴虚型、阴虚阳亢型、气阴两虚型围绝经期综合征与正常对照组HRV各指标的差异。结果围绝经期综合征患者三型之间TP、VLF、LF的差异显著,总的趋势从肝肾阴虚型、阴虚阳亢型、气阴两虚型依次降低(P<0.05,P<0.01);气阴两虚型较其他两型TP、VLF、LF、HF、LF/HF比值、VLF/HF比值、SD、LFnorm降低,HF、HFnorm升高,差异显著(P<0.05,P<0.01);肝肾阴虚型与正常对照组间HRV差异不显著(P>0.05);结论HRV的部分指标可能为围绝经期综合征中医辨证分型的客观化提供参考。     

Intraoperative malignant glaucoma during femtosecond laser-assisted cataract surgery: A case report

Rationale:Femtosecond laser-assisted cataract surgery (FLACS) has grown in popularity among ophthalmologists as a novel surgical technique. However, malignant glaucoma (MG) is a complication of FLACS. Herein, we report a case of MG following FLACS.Patient concerns:A 66-year-old woman presented with complaints of blurred vision in the right eye and a foreign body sensation in both eyes. Ophthalmological examinations showed that the corrected distance visual acuity was 20/50 and 20/25 in the right and left eyes, respectively. Without any topical anti-glaucoma medication, the intraocular pressure (IOP) was 20 mmHg in the right eye and 17 mmHg in the left eye. Slit-lamp examination of the right eye revealed a transparent cornea with a defect in the punctate overlying epithelium; the central anterior chamber depth was shallow the peripheral iris laser shot was visible, the pupil was normal, and the lens was mainly cortical opacified.Diagnoses:Based on the patient''s symptoms, examination results, and preliminary diagnoses, age-related cataract in the right eye, binocular post-antiglaucoma surgery, pseudophakicin in the left eye, and Sjogren syndrome were included.Interventions:FLACS was performed to facilitate anterior capsulotomy and segmentation of the nucleus in the right eye. MG occurred after the femtosecond procedure, and with the treatment of medicines combined with phacoemulsification, IOP was eventually normal without further antiglaucoma therapy.Outcomes:IOP was 16 mmHg on postoperative day 1. Ocular ultrasonography revealed no choroid detachment or hemorrhage in the right eye. Two weeks postoperatively, uncorrected visual acuity was 20/25, and IOP remained normal with no further antiglaucoma treatment on 1 month postoperatively.Conclusions:We describe the occurrence of MG after FLACS and illustrate that miosis and bubble formation after FLACS may be risk factors for MG during FLACS.