Effect of puerarin on matrix metalloproteinase-2 in human fetal scleral fibroblasts treated with low frequency electromagnetic fields

Objective

To study the effect of puerarin on matrix metalloproteinase-2 (MMP-2) gene and protein expression in human fetal scleral fibroblasts (HFSFs) exposed to extremely low frequency electromagnetic fields (ELF-EMF).

Methods

Cultured HFSFs were exposed to 0.2 mT ELF-EMF for 24 h. The experimental groups were divided into subgroups treated with 0, 0.1, 1 and 10 µM puerarin respectively. The expression of MMP-2 mRNA and protein were detected with real-time polymerase chain reaction and western-blot analysis respectively.

Results

MMP-2 mRNA and protein expression increased by 0.793 and 1.130 folds respectively under the exposure of ELF-EMFs at 0.2 mT flux density for 24 h. Puerarin at the concentration of 0.1 μM reversed this effect by 8.53% in mRNA and by 17.97% in protein expression (P<0.05). The effect was more prominent at higher concentrations (1 and 10 μM, P<0.01).

Conclusion

Exposure to ELF-EMFs increased the expression of MMP-2 mRNA and protein in HFSF cells. Puerarin reversed the action to some extent in a specific concentration range. Our results implied that the puerarin might protect scleral tissue from increased expression induced by exposure to ELF-EMFs.     

新止骨增生丸＋止痛散帖敷TDP照射＋熏洗1号蒸汽浴＋离子导入＋玻璃酸钠关节腔注射治疗早期膝关节骨性关节炎90例临床观察

[目的]观察新止骨增生丸＋止痛散帖敷TDP照射＋熏洗1号蒸汽浴＋离子导入＋玻璃酸钠关节腔注射治疗早期膝关节骨性关节炎疗效。[方法]使用前瞻性设计方法,对90例早期膝关节骨性关节住院患者使用①新止骨增生丸（熟地黄、牛膝、杜仲、鸡血藤、骨碎补）,3粒／次,三次／d。②止痛散贴敷TDP照射（苏木、路路通、木瓜、花椒、冰片、透骨草、木香、川芎、伸筋草、独活、红花、木通、制川鸟、制草鸟、荆芥、细辛、大黄、薄荷脑）,调成匀浆涂于药布上,敷于膝关节上,TDP神局部照射,30min次,1～2次／d。（3）熏洗1号方蒸汽浴（伸筋草、透骨草、荆芥、花椒、红花、秦艽、大黄、当归、赤芍、川芎、延胡索、海桐皮、防风、威灵仙、少年健、羌活、苏木）蒸汽床局部熏蒸,1～2次／d。④超声离子导入。NAVA-01LD型超声电导仪,原厂止痛贴片为耦合剂,2次／d,30min/次。⑤玻璃酸钠膝关节腔注射．1次／周：膝关节腔积液明显．髌试验阳性．抽吸关节积液。连续治疗4周为1疗程。观测临床症状、膝关节疼痛及功能、不良反应。治疗1疗程．判定疗效。[结果]痊愈45例,显效27例,有效15例,无效3例,总有效率96．70％。[结论]新止骨增生丸＋止痛散帖敷TDP照射＋熏洗1号蒸汽浴＋离子导入＋玻璃酸钠关节腔注射治疗早期膝关节骨性关节炎,疗效满意,无副作用,值得推广．     

γ辐照装置辐射安全审查公众剂量估算及管理须知

为优化y辐照装置项目的公众剂量估算及管理,降低营运成本,对y辐照装置的辐射公众剂量估算及管理较突出的问题进行探讨。不合适的剂量估算与管理导致营运成本较高及监管方、项目营运方等产生争议。在一些情形下分别采取引入第3组工作人员,具体分析公众受照、项目运行信息,设置隔离区域的措施有利于在人员及环境得到保护的前提下进行监管和使项目营运顺利。     

3A类半导体激光治疗仪的作用机理研究

目的:研究3A类半导体激光治疗仪的作用机理和医学应用,以规范和明确该类产品的预期用途,降低产品使用风险。方法:对我国医学专业文献进行综述研究,并结合美国FDA半导体激光产品的技术指导原则,分析研究3A类半导体激光的工作原理、生物效应、作用机理。结论:对于3A类半导体激光治疗设备,具有较为成熟机理和临床研究数据支持的医学应用主要是血管外照射和镇痛。为降低上市产品风险,可采用规范临床试验审评、加强质量体系控制和加强上市后监测等监管措施。     

Attenuation Effect of UV on Haemonchus contortus Larvae in Experimentally Infected Goats

Background

Haemonchus contortus causes severe economic losses in small ruminants, so this study was conducted to study the UV effect on H. contortus larvae and its protective effect.

Methods

Sixteen male goats were divided into 5 groups, control infected, control uninfected and UV 30 minutes exposure; UV 60 minutes exposure and UV booster 60 minutes exposure. The UV groups were exposed to UV irradiation at wave length 254 nm for 30 and 60 minutes. The UV booster 60 min was administrated 2 doses of exposed larvae with an interval of one month. All groups except the control negative one were challenged for 42 days from the beginning.

Results

In UV booster 60 min had reduction in egg count per gram feces and worm burden (93% & 34 % respectively). The establishment rate and relative fertility declined in comparison with other groups. These parameters were similar in control infected, UV 30 min and UV 60 min groups. PCV value of UV booster 60 min group was similar to uninfected group. After two weeks from the booster dose of irradiated larvae, increased levels of antibody were found in goats of UV booster 60 min group.

Conclusion

Two doses of UV 60 min exposure, with an interval of one month, gave reduction not only in egg per gram feces but in worm burden as well.     

NB-UVB照射联合复方青黛胶囊治疗玫瑰糠疹疗效观察

目的：观察NB-UVB照射联合复方青黛胶囊治疗玫瑰糠疹临床疗效。方法：120例患者随机分为对照组（60例）和治疗组（60例）,对照组给予复方青黛胶囊2g,口服,3次／d,疗程2周;治疗组NB-UVB照射治疗,照射剂量为0．2J／cm^2,每周3次,疗程2周,同时联合复方青黛胶囊2g,口服,3次／d,疗程2周。结果：对照组总有效率为65．0％,治疗组总有效率为88．3％,经统计学处理,两组间差异极显著（P〈0．01）;治疗期间治疗组3例患者照射后出现轻度红斑和瘙痒,减少照射剂量,红斑消退,瘙痒减轻,继续完成了治疗;随访1个月,治疗组60例均痊愈,对照组3例仍无效,5例躯干部留有少许红斑,偶有瘙痒。结论：NB-UVB照射联合复方青黛胶囊治疗玫瑰糠疹临床疗效优于单纯应用复方青黛胶囊口服。     

Pre-irradiation of mouse mammary gland stimulates cancer cell migration and development of lung metastases

Background:

In most patients with breast cancer, radiotherapy induces inflammation that is characterised by an increase of promigratory factors in healthy tissues surrounding the tumour. However, their role in the emergence of the migration phenotype and formation of metastases is still unclear.

Methods:

A single mammary gland of BALB/c mice was irradiated with four doses of 6 Gy given at a 24-h interval. After the last session of irradiation, treated and control mammary glands were either collected for quantification of promigratory and proinflammatory factors or were implanted with fluorescent ubiquitination-based cell cycle indicator (FUCCI)-expressing mouse mammary cancer D2A1 cells. The migration of cancer cells in the mammary glands was monitored by optical imaging. On day 21, mammary tumours and lungs were collected for histology analyses and the quantification of metastases.

Results:

Pre-irradiation of the mammary gland increased by 1.8-fold the migration of cancer cells, by 2-fold the quantity of circulating cancer cells and by 2.4-fold the number of lung metastases. These adverse effects were associated with the induction of interleukin-6 (IL-6) and cyclooxygenase-2 (COX-2).

Conclusion:

The emergence of the metastasis phenotype is believed to be associated with the accumulation of mutations in cancer cells. Our results suggest an alternative mechanism based on promigratory factors from irradiated mammary glands. In clinic, the efficiency of radiotherapy could be improved by anti-inflammatory agents that would prevent the stimulation of cancer cell migration induced by radiation.     

Métastases osseuses : les nouvelles techniques d’irradiation et traitements combinés ablatifs décalent-ils les standards ?

IntroductionIrradiation of bone metastases primarily aims at alleviating pain, preventing fracture in the short term. The higher doses and more conformal dose distribution achievable while saving healthy tissue with new irradiation techniques have induced a paradigm shift in the management of bone metastases in a growing number of clinical situations.Materials and MethodsA search of the English and French literature was conducted using the keywords: bone metastases, radiotherapy, interventional radiology, vertebroplasty, radiofrequency, chemoembolization.Results-discussionStereotactic irradiation yields pain relief rates greater than 90% in Phase I/II and retrospective studies. IMRT (static, rotational, helical) and stereotactic irradiation yield local control rates of 75-90% at 2 years. Some situations previously evaluated as palliative are currently treated more aggressively with optimized radiation sometimes combined modality interventional radiology.ConclusionA recommendation can only be made for stereotactic irradiation in vertebral oligometastases or reirradiation. In the absence of a sufficient level of evidence, the increasing use of conformal irradiation techniques can only reflect the daily practice and the patient benefit while integrating economic logic care. The impact of these aggressive approaches on survival remains to be formally demonstrated by interventional prospective studies or observatories including quality of life items and minimal 2-year follow-up.     

红蓝光照射联合阿达帕林凝胶治疗轻、中度痤疮

目的 探讨红蓝光照射联合阿达帕林对轻、中度痤疮患者的治疗效果.方法 选取2018年5月至2019年5月我院收治的150例轻、中度痤疮患者,并随机分为两组.给予实验组(n=75)红蓝光交替照射联合阿达帕林凝胶治疗,对照组(n=75)给予阿达帕林凝胶治疗.治疗周期为1个月.结果 实验组和对照组患者在性别、年龄、血压、肝功能...