Effectiveness of <i>Thymus vulgaris</i>Essential Oil in the Treatment of Skin Infections in Dogs

Currently, there are no data in the literature on the topical treatment with Thymus vulgaris essential oil (EO) in bacterial skin infections of dogs. This study evaluates the effectiveness of Thymus vulgaris EO for topical use in dogs with skin 18 half-breed dogs, affected by skin infections housed in a rescue shelter were studied. The bacteria isolated from these dogs were identified by MALDI-TOF-MS. The susceptibility of the isolated microorganisms to Thymus vulgaris L. EO was estimated in vitro by bacteriological test (CLSI 2015), in comparison to some antimicrobials drugs (amoxicillin-clavulanic acid, doxycy-cline, thiamphenicol and marbofloxacin) and to Citrus bergamia EO. The dogs, divided in two groups at random, were treated topically for 7 days with Thymus vulgaris L. EO (Group 1: n. 10 animals) and Citrus bergamia Risso e Poiteau EO (Group 2: n. 8 animals) respectively. The bacteria isolated were: Staphylococcus pseudintermedius (7 samples), Staphylococcus sciuri (4), ESBL Escherichia coli (3) and Proteus mirabilis (4). In all animals treated with Thymus vulgaris EO, the clinical signs decreased rapidly within 5 days from the administration, with complete remission 7 days after the treatment. No bacterial growth was observed from skin swabs after 7 days of treatment. None of the treated animals showed local or general side effects. The use of Thymus vulgaris EO could be a possible alternative or additional treatment to antibiotics in dermatological infections, particularly in cases refractory to conventional therapy.

热性中药挥发油透皮促渗不同成分的规律性研究

目的阐明热性中药挥发油透皮促渗不同成分的规律性。方法以五种热性中药挥发油(高良姜油、干姜油、肉桂油、胡椒油、吴茱萸油)为研究对象,以常用化学促渗剂(Penetration enhancer,PE)氮酮为对照,首先考察皮肤安全性,然后在建立分析方法的基础上,采用改良Franz扩散池法进行体外透皮实验以考察热性中药挥发油透皮促渗9种中药成分的效果。结果5种热性中药挥发油皮肤细胞毒性IC 50值是氮酮的3.63~8.15倍。HPLC方法专属性良好,各成分均有良好的线性关系、精密度、重复性、稳定性和准确性。热性中药挥发油的透皮促渗效果与所促渗成分的油水分配系数相关,对于log P在2.6~3.5范围内的亲脂性成分如白藜芦醇、延胡索乙素、槲皮素等促渗效果较好。结论应根据促渗成分的油水分配系数合理选用热性中药挥发油透皮促渗剂。

芸豆皮多酚制备、纯化、鉴定及抗油脂氧化作用研究

为了探究紫花芸豆皮多酚的制备纯化工艺及抗油脂氧化作用,本研究以紫花芸豆皮为原料,采用单因素实验考察了提取溶剂浓度、提取温度、提取时间、料液比和提取次数对芸豆皮多酚提取量的影响;利用HPD600大孔树脂对芸豆皮多酚粗提液进行了纯化,并采用液相色谱质谱联用仪分析酚类物质组成;以过氧化值为指标利用Arrhenius方程建立花生油的货架期预测模型。结果表明,乙醇浓度60%、提取温度70℃、提取时间40 min、液料比1:60(g:mL)、提取次数4次为芸豆皮多酚的最佳提取条件,此时芸豆皮多酚提取量为0.18±0.49 g/g;HPD600大孔树脂对紫花芸豆皮多酚的静态吸附容量、解吸率最大,适合分离纯化紫花芸豆皮多酚,最佳纯化工艺为上样流速1.0 mL/min、洗脱剂乙醇浓度60%和洗脱流速1.0 mL/min,此时芸豆皮多酚纯度为54.68%±1.97%;芸豆皮中含有19种单体酚,其中儿茶素含量最高,为425.952±7.652μg/g;添加芸豆皮多酚或抗氧化剂能有效延缓食用油过氧化值升高,通过模型推算多酚-维生素C复配的花生油在20℃条件下的货架期最长可达193.4 d,对照组货架期为150.3 d,与实测值最大相对误差为8.7%,可准确预测该食用油的货架期。综上,芸豆皮多酚具有较强的抗氧化性,具有安全的天然食品抗氧化剂的潜在用途。

Correlation Demodex Folliculorum and Skin Biophysical Parameters

Purpose: Demodex folliculorum is a transparent mite, 0.3 - 0.4 mm long, which asymptomatically parasitizes the human pilosebaceous follicles. D. folliculorum is observed in normal skin with a prevalence of 100% and a density of ≤ 5 D/cm2 in the adult population. Materials and Methods: This study evaluated the differences in pH on the five facial sites between the two populations with and without D. folliculorum. The relationship between pH and skin surface oil was analyzed in populations with and without Demodex mites. Mongolian 750 subjects (370 males and 380 females) aged 16 - 84 years, who lived in Ulaanbaatar city, were enrolled in this study. The eligibility criteria included a minimum age of 16 and no physical and dermatologic illness, no cosmetic. Results: Skin surface oil among the five facial areas differed significantly in both subjects with and without Demodex folliculorum (P < 0.001). When the skin surface oil on the T-zone, U-zone was compared, those on the T-zone were significantly higher than those of the U-zone (P < 0.001) in both populations (P< 0.01). The pH levels on the five facial sites, and U-zone, T-zone and MFpH differed significantly in among both subjects with and without Demodex folliculorum (P < 0.001). In both groups, the pH levels of the U-zone were significantly lower than the pH of the T-zone (P Conclusions: Among the five facial sites in subjects with Demodex folliculorum, there were significant negative correlations between skin surface oil and pH on the forehead (p < 0.001, r = 652), cheek (P < 0.001, r = 0.656), nose (P < 0.001, r = 0.754), chin (P < 0.001, r = 0.679), and T-zone (P < 0.001, r = 0.698), MFSE-MFpH (P < 0.001, r = 0.483). In contrast, among the five sites in subjects without Demodex folliculorum, a significant negative correlation between skin surface oil and pH was observed on the forehead (p < 0.001, r = 766), cheek (P < 0.001, r = 0.798), nose (P < 0.001, r = 0.706), chin (P < 0.001, r = 0.823), and T-zone (P < 0.001, r = 0.602), U-zone (P < 0.001, r = -0.550)

Evolution of Post-Surgical Scars Treated with Pure Rosehip Seed Oil

The rosehip seed oil (RHO), obtained from different plant species of the genus Rosa, is one of the compounds used empirically for cosmetic improvement of skin scarring. Despite its widespread use in clinical practice, there are few studies evaluating the activity of this compound on the clinical course of cutaneous scars. The aim of this study was to determine the effect of Repavar&reg?rosehip oil on improvement of post-surgical skin scars. One comparative, single-center, prospective clinical trial was carried out in 108 patients undergoing cutaneous surgery procedures in the Dermatology Service of University Hospital of Gran Canaria Dr. Negrín (Spain). Subjective parameters (erythema, discoloration, atrophy and hypertrophy) were evaluated at 6 and 12 weeks on 76 adults who treated scars with pure RHO twice a day (test group), 32 patients with not treatment (control group), and completed the study. Lesser degree of erythema was observed at 6 and 12 weeks in treated-patients compared with the control group and decreased discoloration and atrophy at 12 weeks, with statistically significant differences in all cases (p < 0.05). This study demonstrates that the RHO Repavar&reg?is useful for cosmetic improvement on erythema, discoloration and atrophyof post-surgical skin scars, getting a better overall evolution and appearance thereof.

Repeated Exposure to Cruciferous Allyl Nitrile Protects against Chemically Induced Skin Inflammation in the Mouse

Repeated exposure to cruciferous allyl nitrile can induce antioxidant and phase 2 detoxification enzymes in various tissues. In the present study, we examined the effect of five days repeated exposure to allyl nitrile at subtoxic levels (0 - 400 μmol/kg/day) on the mouse ear. There was an increase in catalase activity in the ear at 100 - 400 μmol/kg/day, while elevated quinone reductase activity was observed at 400 μmol/kg/day only. Next, after repeated allyl nitrile exposure (0 - 400 μmol/kg/day), the skin irritant croton oil was applied to the ear to induce skin acute inflammation (oedema). Compared with the 0 μmol/kg/day group, animals in the 100 and 400 μmol/kg/day pre-treatment groups showed reduced oedematous response to croton oil. The reduced oedematous response was inversely associated with enhanced myeloperoxidase activity used as index of the presence of neutrophils. These data suggest that repeated exposure to allyl nitrile at subtoxic levels contributes to protection against croton oil-induced ear dermatitis, potentially through decreasing reactive oxygen species and through infiltration of neutrophils.

Use of Sea Buckthorn Oil in the Treatment of Skin Disease: Anti-Inflammatory Benefits, Clinical Applications, and Formulary Challenges

Skin diseases such as psoriasis, atopic dermatitis, burns, and other barrier insults pose ongoing therapeutic challenges, often requiring treatments that address both inflammation and skin barrier repair. The primary aim of this review is to provide a comprehensive overview of the potential benefits of sea buckthorn oil, derived from Hippophae rhamnoides, as a treatment for various skin diseases, detailing its anti-inflammatory properties, reporting benefits across several skin conditions, and highlighting challenges in formulation as well as preservation of the oil’s nutritional benefits. Drawing from a wide array of existing literature, this review investigates sea buckthorn oil’s rich composition of omega fatty acids, vitamins, and antioxidants, which may contribute to its therapeutic effects by modulating inflammatory pathways and enhancing skin barrier function. Clinical trials and patient case studies indicate that sea buckthorn oil shows promise in reducing erythema, inflammation, and improving skin sensitivity. However, challenges such as formulation stability, sourcing of quality oil, and variability in response to treatment across conditions need to be addressed. Future research should focus on optimizing formulations and conducting large-scale clinical trials to validate the therapeutic efficacy of sea buckthorn oil in the management of skin diseases. Additionally, further exploration of the regulatory mechanisms underlying its ability to modulate inflammation and repair the skin barrier is needed to fully elucidate its clinical potential. Sea buckthorn oil offers a novel and promising adjunctive treatment for psoriasis, atopic dermatitis, and wound-healing with significant potential to enhance therapeutic options for additional skin diseases.

蕲艾挥发油通过PI3K/Akt信号通路促进感染性皮肤创口愈合的机制研究

目的观察蕲艾(Artemisia argyi Levl.et Van.var.argyi cv.Qiai)挥发油对感染性皮肤创口愈合的作用并探索其机制。方法将30只雄性昆明小鼠随机分为5组:空白对照组、膜剂基质组、阳性对照组(3 mL·kg^(-1)莫匹罗星软膏)、低剂量膜剂组(每贴含7.3 mg蕲艾挥发油)和高剂量膜剂组(每贴含57.6 mg蕲艾挥发油)。小鼠麻醉后在背部剪一直径10 mm的全层皮肤圆形伤口,止血后在创口处涂抹100μL金黄色葡萄球菌菌液(1.5×10^(8) CFU·mL^(-1)),各组采取前述方式处理伤口,每日换药并观察皮肤创面愈合情况。术后12 d处死小鼠取创面皮肤做HE和Masson染色,观察病理学特征;利用qPCR和Western blot检测创口皮肤组织愈合相关因子Col1a1、Col3a1、Fn1、VEGFA及炎症因子IL-1β、IL-6、TNF-αmRNA和PI3K/Akt信号通路蛋白的表达。在小鼠胚胎成纤维细胞NIH-3T3利用PI3K抑制剂PI-103探究蕲艾挥发油对PI3K/Akt信号通路活性的潜在影响。结果动物实验表明,与空白对照组相比,低剂量和高剂量膜剂组的相对创口面积显著降低;创口组织的炎性细胞浸润减少,胶原纤维表达增加;qPCR显示,与空白对照组相比,低剂量和高剂量膜剂组的VEGFA、Col3a1和Col1a1 mRNA的表达显著上升,炎症因子IL-1β和TNF-αmRNA表达降低;Western blot结果表明,与空白对照组相比,低剂量和高剂量给药组的p-PI3K/PI3K及p-Akt/Akt比值均显著上升并呈现剂量依赖性。细胞实验结果也证实,蕲艾挥发油对NIH-3T3细胞的PI3K/Akt信号通路存在调控作用。结论蕲艾挥发油可促进创口愈合,其机制可能与激活PI3K/Akt信号通路,抑制炎症因子表达及促进胶原表达有关。

无患子籽油护肤乳液的制备及性能分析

为促进无患子籽油在化妆品中的应用研究,首先以无患子籽油为原料制备纳米乳液,以粒径和Zeta电位为指标,采用单因素实验对乳液制备工艺条件进行了优化,然后在单因素实验的基础上制备无患子籽油护肤乳液,并以橄榄油护肤乳液和商品护肤乳液为对照,对其稳定性、安全性、抗氧化活性、保湿性、酪氨酸酶抑制活性及紫外吸收效果进行了评价。结果表明:无患子籽油纳米乳液的最佳制备工艺条件为复合乳化剂(吐温-60与Span A83体积比3∶1)添加量8%、助乳化剂添加量6%、无患子籽油添加量2%或4%、乳化温度70℃、剪切速度12000 r/min;3种护肤乳液RY-1(无患子籽油添加量2%)、RY-2(无患子籽油添加量4%)、RY-3(橄榄油添加量2%)的稳定性、安全性均较好;RY-1、RY-2、RY-3清除DPPH·的EC_(50)分别为61.5、55.7、58.1μg/mL,清除ABTS+·的EC50分别为58.3、50.1、53.5μg/mL,清除·OH的EC50分别为59.7、30.2、59.9μg/mL,清除O_(2)^(-)·的EC_(50)分别为59.6、41.8、57.3μg/mL,对酪氨酸酶活性抑制的EC_(50)分别为147.5、118.6、140.2μg/mL;在相对湿度43%、81%环境下,4种护肤乳液保湿率大小顺序均为RY-2>商品乳液>RY-3>RY-1;无患子籽油护肤乳液具有一定的紫外吸收能力。综上,RY-2配方优于RY-1和RY-3,无患子籽油护肤乳液安全无刺激性,且具有一定抗氧化活性,有良好的应用前景。

玫瑰精油对皮肤成纤维细胞生物学功能的影响

文章旨在探究不同浓度玫瑰精油对D-gal诱导的皮肤成纤维细胞衰老的影响。设立空白对照组、D-gal组、D-gal+玫瑰精油组。用β-gal染色检测阳性细胞数目、EdU-594染色检测细胞增殖能力和划痕实验检测细胞迁移能力。β-gal染色结果显示,D-gal+玫瑰精油组与对照组(D-gal组)比较,衰老染色阳性细胞数减少(p<0.001);EdU-594染色结果显示,与对照组相比,D-gal+玫瑰精油组增殖细胞数增多(p<0.01);细胞迁移实验结果显示,D-gal+玫瑰精油组细胞迁移率增加(p<0.001)。可见,玫瑰精油可以减少D-gal模型中细胞衰老数目,提高皮肤成纤维细胞的增殖能力,增加皮肤成纤维细胞的迁移能力。

青蒿油对银屑病小鼠模型的干预作用

目的 初步探究青蒿油(AN)对银屑病小鼠模型的干预作用及对血清炎性因子的影响。方法 构建银屑病小鼠模型,利用随机数字表法,将32只小鼠分为对照组、模型组、阴性对照(NC)组、0.5%AN组、1.0%AN组、1.5%AN组、3.0%AN组和5.0%AN组,每组4只。小鼠背部涂抹咪喹莫特乳膏构建银屑病小鼠模型,将不同浓度的AN按照相应分组进行喷雾给药,连续干预2周。观察各组小鼠皮损情况并进行银屑病面积严重程度指数(PASI)评分;收集各组小鼠皮损部位组织进行HE染色,观察皮损部位病理学改变;采用酶联免疫吸附测定(ELISA)法检测血清中炎性因子白细胞介素-1β(IL-1β)、肿瘤坏死因子-α(TNF-α)和IL-6水平。结果 与对照组比较,其余各组小鼠皮损区病理均可见表皮组织增厚,棘突增长并伴有大量炎性细胞浸润;血清中IL-1β、TNF-α、IL-6表达水平均显著上调;与模型组或NC比较,各AN干预组小鼠PASI评分、血清中IL-1β、TNF-α、IL-6表达水平均有不同程度的降低,病理损伤均呈现不同程度的好转。结论 3.0%及以上AN可缓解银屑病的皮损状况;0.5%AN即可缓解银屑病的炎性反应,其中1.0%、5.0%AN缓解效果显著。

青蒿油对小鼠痤疮模型及皮肤微生态的干预作用研究

目的:评价青蒿油(artemisia naphta oil,AN)对痤疮丙酸杆菌(P.acnes)诱导的小鼠痤疮模型的疗效及皮肤微生态的影响。方法:将48只小鼠分为正常组、模型组、Base组、不同浓度AN干预组(0.5%、1.0%、1.5%、3.0%、5.0%AN组),每组6只。P.acnes注射耳朵皮内构建痤疮模型,小鼠右耳出现红肿后,Base组涂抹Base水对照干预,其余给予不同浓度的AN干预,每次涂抹1 mL,每天1次,17天后观察小鼠耳部厚度,HE染色观察皮肤病理,16S rRNA测序分析皮肤微生态变化,Western blot检测IL-6、IL-1β和TNF-α含量和TLR2、TLR4、P65、p-P65蛋白表达。结果:模型组小鼠耳部出现红肿、表皮层增厚、真皮层炎症细胞浸润,耳部菌群丰度和多样性降低,其中葡萄球菌、粘质沙门氏菌菌群丰度显著增加,双歧杆菌属、棒状杆菌属、Atopostipes菌群丰度显著下调;IL-6、IL-1β、TNF-α含量和TLR2、TLR4、p-P65/P65蛋白表达显著上升。Base组小鼠TLR2、TLR4、p-P65蛋白表达水平无明显改变。不同浓度AN处理后的小鼠耳部红肿、病理损伤减轻,耳部菌群丰度和多样性改善,葡萄球菌、粘质沙门氏菌显著下调,双歧杆菌属、棒状杆菌属、Atopostipes菌群丰度显著上调,且IL-6、IL-1β、TNF-α含量和TLR2、TLR4、p-P65/P65蛋白表达显著下降。结论:AN可降低促炎因子分泌,减轻皮肤炎症反应,增加皮肤有益菌的丰度,抑制病原菌生长,恢复皮肤微生态平衡,有效改善痤疮炎症样皮损变化。

温和清洁泥膜改善油性敏感性皮肤的临床研究

研究一款温和清洁泥膜改善油性敏感性皮肤的临床功效。招募32名油性敏感性皮肤女性受试者,结合无创性仪器检测、专家临床评估、受试者自我评估方法分别研究单次使用泥膜对面部皮脂、卟啉及角质层含水量的作用以及长期使用泥膜对受试者面部粉刺、皮肤纹理、屏障功能的作用。与空白半脸对照相比,受试者面部单次使用泥膜15 min洗去后,皮肤的皮脂含量、卟啉数量显著降低,而角质层含水量显著增加;连续使用泥膜4周后,受试者黑头和白头数量、皮肤粗糙度、鳞屑度、皱纹程度显著降低,但经皮失水量未出现显著性变化。整个实验过程中无皮肤不良反应发生,90%以上受试者认为样品使用对皮肤温和不刺激。该清洁泥膜对油性敏感性皮肤具有良好的清洁、保湿、控油、祛粉刺、去角质等作用,同时配方温和、保湿、长期使用不损伤皮肤屏障,适合敏感性皮肤使用。

唇部皮肤生理参数的多维度分析和研究

通过考察不同地区、不同年龄和不同性别受试者唇部皮肤基础状态,进行唇部生理参数的多维度分析和研究,并通过唇油对唇部皮肤的干预,来探究影响唇部皮肤性状的主要因素。用无创性评价方法测定了华东地区(73名)和华北地区(50名)受试者(18~35岁73名,35~60岁50名;男性55名,女性68名)唇部下唇的水分含量、TEWL、光泽度、弹性、L^(*)a^(*)b^(*)值和纹理8个皮肤生理参数。研究结果表明,华东地区组受试者唇部基础状态的经皮水分散失(Trans Epidermal Water Loss,TEWL)值(51.99±17.37)、L*值(51.99±8.83)、b*值(15.40±1.56)和纹理值(15.10±6.43)分别显著高于华北地区组(P<0.05)。35~60岁组受试者唇部基础状态的水分含量(56.82±12.63)和皮肤弹性(0.78±0.18)显著高于18~35岁组(P<0.05)。男性组唇部基础状态的TEWL值(52.08±17.68)显著高于女性组(43.48±16.03)(P<0.05)。通过唇油对唇部皮肤的干预,与基础状态相比,受试者使用唇油后其唇部水分含量均是先降低后逐渐升高;TEWL值先显著性降低后逐渐增加;光泽度、弹性和纹理均是先增加后减小;皮肤色泽(L^(*)a^(*)b^(*)值)的变化不显著。由此可知,受试者唇部皮肤生理参数不仅受到地区、年龄以及性别的影响,还与受试者唇部基础状态及唇部产品的使用频率等因素相关。

一种新型功效组合物的油敏性皮肤舒缓功效研究

目的:多方面评估一种新型功效组合物五环精华对油敏性皮肤的舒缓功效。方法:以上海地区34名18~60岁的油敏性肤质健康女性受试者为研究对象,采用自体前后对照的方法来评估长期使用五环精华对油敏性皮肤的舒缓功效。结果:受试者连续使用五环精华4周后,皮肤的多项生理指标得到显著改善,包括角质层含水量增加13.29%,经表皮失水下降11.72%,温度下降1.91%,油脂分泌量减少21.21%,红斑指数下降7.70%,黑色素指数下降4.54%,色**度a值下降5.84%,色度L值增加5.68%,乳酸刺激2.5min后评分下降58.16%(均P<0.01)。结论:对于油敏性皮肤,五环精华能够有效增加皮肤含水量,减少油脂分泌和色素沉着,缓解炎症状态,提亮肤色且刺激性小,显著改善皮肤屏障功能,说明其具有皮肤舒缓和修复功效。

糖脂对痘痘肌的护理功效研究

糖脂属脂类化合物,是一类含有糖基配体的两亲性分子。从抑菌、抗炎、抗敏、控油、舒缓和修复等方面,研究了糖脂在痘痘肌护理中的功效。研究结果显示,糖脂对痤疮丙酸杆菌具有优异的抑菌性能;当糖脂用量达到10μg/mL时,糖脂对SZ95细胞脂质合成的抑制率可达20%;糖脂对LPS诱导的RAW264.7细胞的炎症因子IL-6和NO的释放具有抑制作用;当糖脂浓度为15 mg/mL时,糖脂对透明质酸酶的抑制率达到45.8%;当糖脂浓度为25μg/mL时,对钙离子浓度的抑制率达到45.3%;糖脂对伤口愈合有明显的促进作用。人体功效评价表明,糖脂产品对痘痘肌具备综合护理功效。本研究有助于进一步推动糖脂在化妆品特别是在痘痘肌护肤品中的应用。

低温高雷诺数下摩擦阻力测量及多孔介质减阻研究

为研究低温高雷诺数条件下多孔介质湍流减阻规律及雷诺数效应,在0.3 m低温连续式风洞开展了壁面摩擦阻力测量及多孔介质减阻试验。分别在光滑平板和多孔介质区域下游布置低温脉动压力传感器和油流,对脉动压力功率谱及下游全局摩擦阻力进行测量。结果表明:摩擦阻力系数随雷诺数的增大而减小;多孔介质减阻率随雷诺数的增大(增大马赫数或降低来流总温),呈无固定规律下降趋势,且多孔介质的引入,使下游脉动压力的低频信号强度增加,高频信号强度减弱;在马赫数Ma=0.300、雷诺数Re=7.51×10^(6)、来流总温T_(0)=140 K这一典型工况下,多孔介质仍具有11.4%的减阻率,初步验证了在低温高雷诺数条件下使用多孔介质减阻控制策略的可行性。

杏仁皮油营养品质及组成分析

目的系统评价杏仁皮油营养品质及组成。方法采用气相色谱仪、高效液相色谱仪及气相色谱-质谱联用仪分析杏仁皮油的甘油三酯组成、sn-2脂肪酸分布及微量组分含量。结果杏仁皮油中甘油三酯主要为LLO,其sn-2位脂肪酸主要为亚油酸与油酸;杏仁皮油中植物甾醇含量为1027.49 mg/kg,生育酚含量为337.35 mg/kg,角鲨烯含量为22.47 mg/kg,多酚含量为15.33 mg/kg。结论杏仁皮油属于高品质的植物油。

回归法测试化妆品保湿功效的研究

应用回归法测试油脂主要为矿物油脂和植物油脂的2组样品,涂抹样品7天、14天验证产品保湿性,同时测试停用产品4天、7天、14天后产品保湿效果。研究发现,涂抹样品7天、14天后皮肤角质层水含量显著提升,皮肤经皮水分流失显著降低;停用样品7天后皮肤角质层含水量在洗脱期结束的基础上仍然保持显著升高,仍然具有保湿效果;停用样品14天后皮肤经皮水分流失在洗脱期结束后的基础上显著降低,仍然具有较好的锁住肌肤水分的功效。油脂为植物油脂的样品经皮水分流失平均值变化率提升趋势低于矿物油脂组,表明植物油脂能更好修护皮肤屏障,为后续开发同类产品提供参考。

挪威云杉叶提取物在油性皮肤护理中的应用研究

为研究挪威云杉叶提取物在油性皮肤护理中的应用,对其体外控油和抗炎活性进行研究,结果发现对比模型组,挪威云杉叶提取物显著降低了皮脂腺分泌脂质(p<0.05),并呈现剂量依赖性关系,同时10%挪威云杉叶提取物能够显著下降NO含量(p<0.05)。进一步制备含2.5%挪威云杉叶提取物的乳液,招募30名油性皮肤志愿者使用14天后测量其油脂含量、皮肤光泽度和亮度等参数。结果表明,使用14天后,志愿者皮肤油脂显著下降(p<0.050),与此同时,光泽度和皮肤亮度显著上升(p<0.05)。表明挪威云杉叶通过抑制皮脂腺细胞分泌脂质以及抗炎从而达到控制面部油脂分泌的效果。