Preparation and characterization of triclosan nanoparticles intended to be used for the treatment of acne

This work focuses on the preparation and characterization of nanoparticles containing triclosan. Additionally, in vitro percutaneous permeation of triclosan through pig ear skin was performed, and comparisons were made with two commercial formulations: An o/w emulsion and a solution, intended for the treatment of acne. The nanoparticle suspensions were prepared by the emulsification-diffusion by solvent displacement method, using Eudragit® E 100 as polymer. All batches showed a size smaller than 300 nm and a positive Zeta potential, high enough (20-40 mV) to ensure a good physical stability. Differential scanning calorimetry (DSC), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) studies suggested that triclosan was molecularly dispersed in the nanoparticle batches containing up to 31% of triclosan, with good encapsulation efficiency (95.9%). The results of the in vitro permeation studies showed the following order for the permeability coefficients: Solution > cream ≈ nanoparticles; while for the amount retained in the skin, the order was as follows: cream > nanoparticles ≈ solution. Nanoparticles, being free of surfactants or other potentially irritant agents, can be a good option for the delivery of triclosan to the skin, representing a good alternative for the treatment of acne.     

2015名中学生痤疮流行病学调查

目的调查本地区中学生痤疮患病情况，为今后的临床研究提供资料。方法用分层整群抽样调查方法对本地区8所学校的2015名中学生进行关于痤疮的流行病学问卷调查。结果77．07％的中学生有座疮病史，现患率为54．99％，初次发病平均年龄（13．36±1．38）岁。结论中学生座疮患病率较高，但他们对痤疮的有关知识了解不足，因而有必要在学校或社区开展有关痤疮知识的健康教育。     

Successful treatment of acne keloidalis nuchae with erbium:YAG laser: a comparative study

Background: Acne keloidalis nuchae (AKN) is a chronic inflammatory disease involving hair follicles of the neck. It is a form of keloidal scarring alopecia that is often refractory to medical or surgical management.

Objective: To evaluate the efficacy of Er:YAG laser in the treatment of AKN as compared to long pulsed Nd:YAG laser. Patients and

Methods: This study was conducted on 30 male patients with AKN. Their ages ranged from 19 to 47 years with a mean age of 36.87 ± 7.8 years. Patients were divided randomly into two groups of 15 patients, each receiving six sessions of either Er:YAG or long-pulsed Nd:YAG laser therapy.

Results: A statistically significant decrease in the number of papules was detected at the end of therapy in both groups, with a mean of 91.8% improvement in the Er:YAG group versus 88% in the Nd:YAG group. A significant decrease in plaques count was detected only in the Er: YAG group while a significant decrease in plaques size and consistency was recorded in both groups.

Conclusion: The Er: YAG laser proved to be a potentially effective and safe modality both in the early and late AKN lesions.     

Ergänzende Verfahren in der Aknetherapie

The mainstays of modern acne therapy include comedolytic, antimicrobial, and anti‐inflammatory substances, as well as antiandrogens. Additionally, traditional or newly developed therapeutic approaches may be considered, including pharmacologic (dapsone, zinc) and physical measures (phototherapy, photodynamic therapy, comedone extraction, abrasives). This article reviews such adjunctive therapies with regard to efficacy and their roles in acne therapy.     

女性酒渣鼻患者血清睾酮、二醇和月经的关系

为了探讨女性酒渣鼻患者血清睾酮、雌二醇水平及月经周期改变情况，作者用放射免疫分析法测定了２５例患者及２０例正常对照者血清睾酮及雌二醇水平，并调查了２５０例患者及１００例正常对照者月经周期变化情况。结果显示，患者血清中睾酮的平均值为５．２７ｎｍｏｌ／Ｌ，明显于对照组（ｔ＝２．９１，ｐ＜０．０１）。雌二醇平均值为５７４．６ｎｍｏｌ／Ｌ，与对照组无明显差异（ｔ＝０．１１，ｐ＞０．０５）。患者月经紊乱率为６９．６％，明显高于对照组（χ２＝３５．５５，ｐ＜０．０１）。可见，女性酒渣鼻患者血清睾酮升高，雌二醇正常，且多伴月经周期紊乱。     

基于数据挖掘的刺络放血疗法治疗痤疮规律与特点研究

目的:采用数据挖掘技术对刺络放血治疗痤疮的文献资料进行数据分析,以探讨与总结刺络放血疗法治疗痤疮的规律及特点。方法:针对CNKI、万方、SinoMed、、PubMed等9个数据库中刺络放血疗法治疗痤疮的文献资料进行下载、筛选及所需信息的录入,利用刺络放血数据库平台,运用OLAP技术(联机分析技术)对其进行数据挖掘。结果:纳入刺络放血治疗痤疮的期刊论文230篇,纳入痤疮病例以肺经风热型频次最高,为56次,占24.78%;放血针具以三棱针应用频次最高,为168次,占71.79%;放血部位采用腧穴的研究中涉及足太阳膀胱经及督脉穴位最多,以大椎及背俞穴应用频次最高,采用耳穴的研究则以耳尖及耳背静脉应用频次最高。放血量多描述为少许;治疗组采用配合疗法的研究166项,占72.17%,其中以中药内服、毫针刺法及耳穴贴压应用频次较多;治疗频次以3日1次(每周2次)和2日1次(每周3次)居多,且两者疗程多为10次/疗程,总治疗次数也多为20次。结论:刺络放血治疗痤疮以三棱针点刺大椎及背俞穴最为常用,且均取得较好疗效,但多数研究为配合其它疗法使得疗效更佳。     

HPLC-PDA检测祛痘除螨类化妆品中非法添加盐酸米诺环素方法的建立

目的建立用高效液相色谱-二极管阵列检测法（HPLC-PDA）检测祛痘除螨类化妆品中非法添加的盐酸米诺环素,以打击化妆品中非法添加禁限物质的不法行为。方法采用Waters Symmetry C18（5μm,4.6 mm×250 mm）色谱柱;以醋酸铵缓冲盐溶液（取醋酸铵15 g、氯化钾10 g与乙二胺四乙酸二钠5 g,加水溶解并稀释成1 000 ml）-乙腈（70∶30）为流动相等度洗脱;流速为1.0 ml/min;柱温为25℃;检测波长280 nm;用PDA检测,以保留时间和紫外光谱图定性,峰面积定量。结果盐酸米诺环素在1~100μg/ml范围内与峰面积呈良好的线性关系,相关系数为1.000 0,检出限为0.1μg/ml,方法的回收率为88.5%~98.5%,RSD为1.0%~1.5%（n=6）。结论该方法特异性强,灵敏度高,准确可靠,适用于不同基质样品中盐酸米诺环素的检测。     

口服米诺环素联合外用Derma光治疗重度寻常型痤疮临床观察

目的：探讨口服米诺环素联合外用Derma光治疗重度寻常型痤疮的临床疗效,为临床治疗提供理论依据。方法：选择符合标准的患者80例,采用随机数字的方法分为观察组和对照组各40例,对照组应用口服米诺环素,观察组应用口服米诺环素联合外用Derma光治疗,治疗8周后比较临床疗效。结果：治疗8周后观察组患者总有效率为97.50%,明显高于对照组的80.00%,差异有统计学意义（P〈0.05）。治疗前两组患者GAGS评分相似,差异无统计学意义（P〉0.05）;治疗后,两组患者GAGS评分较治疗前均下降,差异有统计学意义（P〈0.05）,但是观察组患者下降幅度更大（P〈0.05）。治疗期间观察组2例患者经红蓝光照射后面部皮肤出现轻度潮红、瘙痒和脱屑,对症处理1周后症状缓解。对照组未见不良反应。患者均随访3个月,观察组患者复发2例（5.00%）,对照组复发8例（20.00%）,差异有统计学意义（P〈0.05）。结论：口服米诺环素联合外用Derma光治疗重度寻常型痤疮的临床疗效确切,安全可靠,复发率低,值得临床推广使用。     

痤疮患者中Toll样受体的表达及其与IL-8和IL-12水平的相关性

目的探讨Toll样受体2(TLR2)在痤疮发病中的作用及其可能的机制。方法收集Ⅰ~Ⅳ级不同严重程度痤疮患者各35例,应用流式细胞术检测其外周血CD14+单核细胞(PBM)TLR2的表达,同时采用双抗体酶联免疫吸附法(ELISA)检测血清IL-8、IL-12水平。另取35例正常人作为对照组。结果各组痤疮患者外周血单核细胞表面TLR2的表达均显著高于正常人对照组(P0.01),各组患者血清中IL-8和IL-12的水平也显著高于正常人对照组(P0.01)。各组患者TLR2的表达与IL-8呈正相关(r分别为0.452、0.583、0.735、0.648,P0.05),与IL-12水平亦呈正相关(r分别为0.365、0.493、0.526、0.461,P0.05)。痤疮严重程度与TLR2的表达呈正相关(r=0.325,P0.05),与IL-8水平成呈正相关(r=0.426,P0.05),与IL-12水平也呈正相关性(r=0.627,P0.05)。结论 TLR2的表达水平和炎症因子的分泌与痤疮严重程度相关,TLR2的表达在痤疮的发生和发展中起重要作用。     

Taste and olfactory disturbances after treatment for acne with isotretinoin,a 13-cis-isomer of retinoic acid

Summary We report an olfactory disturbance after acne treatment with isotretinoin. A disturbance in taste was also reported by the patient. Examination of the nose showed no pathological findings. A CT scan was done to exclude a tumor or a lesion at the lamina cribrosa. Taste and smell examinations were performed and verified the lost qualities.