Cellyzyme(蘑菇提取物)的美白、祛皱疗效及安全性观察

目的:观察含有Celluzymo(蘑菇提取物)的美白换肤面膜的美白、祛皱作用及安全性.方法:招募30名健康受试者,左右侧面部随机分为治疗侧(使用舍CeLIuzyme的面膜)及对照侧(不用面膜).于使用面膜前、后不同时间点,检测皮肤颜色及角质层含水量,并由医师及受试者各自进行疗效主观评分.结果:治疗侧L差值(皮肤亮度)显著高于对照侧,而·a 差值(反应皮肤的红斑情况),含水量差值则无明显区别.医师及受试者的主观评分均认定面膜可使皮肤美白.毛孔细致、皱纹减少.结论:美白换肤面膜可安全而有效地改善皮肤色泽和质地.     

Safety of Performing Superficial Chemical Peels in Patients on Oral Isotretinoin for Acne and Acne-Induced Pigmentation

BackgroundChemical peels are an integral part of dermatology practice for the treatment of acne, photoaging, and pigmentary dyschromias. Oral isotretinoin is considered the gold standard in the management of acne. Combining both is not currently recommended, due to the increased risk of complications like dryness, erythema, post-inflammatory hyperpigmentation, and scarring.ObjectiveWe sought to assess the safety and efficacy of superficial chemical peels in patients with acne taking isotretinoin and those not taking oral isotretinoin.MethodsA comparative, retrospective analysis of three superficial chemical peels was performed; the analysis included 60 patients and 214 sessions that took place between August 2017 and January 2018. Of these, 47 patients were on oral isotretinoin (Group A) and 13 were not on isotretinoin (Group B). In Group A, a salicylic acid-mandelic acid peel (SMP) was performed on 22 patients, a glycolic acid peel was performed on 18 patients, and a modified Jessner’s peel was performed on seven patients. In Group B, an SMP on eight, glycolic acid peel on four, and modified Jessner’s peel on one patient(s), respectively, were performed. Complications, if any, were noted, and incidence rates were compared by photographic assessment.ResultsOne patient in Group A and one patient in Group B had complications (persistent hyperpigmentation). The difference in the incidence of complications was insignificant between the two groups for all three superficial peels. Furthermore, it was noticed that patients in the isotretinoin group experienced faster and better improvement compared to those in the non-isotretinoin group.ConclusionIn our study, the use of isotretinoin did not result in any complications; hence, we encourage combination therapy to achieve enhanced and faster resolution of acne.     

A Comparison of Microneedling versus Glycolic Acid Chemical Peel for the Treatment of Acne Scarring

BackgroundAcne vulgaris is a common skin disease that frequently results in scarring. Scars secondary to acne can lead to physical disfigurements and a profound psychological impact. Early and effective treatment is the best means to minimize and prevent acne scarring. In patients with darker skin tones, current acne scar treatments pose complications, including dyspigmentation, further scarring, and overall unsatisfactory clinical outcomes.ObjectiveWe sought to compare the efficacy of microneedling versus 35% glycolic acid chemical peels for the treatment of acne scars.MethodsSixty patients with Fitzpatrick Skin Phototype IV to VI with atrophic acne scars were randomized into two groups: Group A underwent microneedling every two weeks for a total of 12 weeks and Group B received chemical peels every two weeks for a total of 12 weeks. Acne scar treatment efficacy was represented by an improvement greater than one grade from baseline according to the Goodman and Baron Scarring Grading System, measured two weeks after the completion of the last treatment session.ResultsGroup A demonstrated more improved outcomes in acne scar treatment compared to Group B; 73.33% (n=22) of patients in Group A achieved treatment efficacy while 33.33% (n=10) in Group B did the same. Additionally, 26.67% (n=8) in Group A showed no efficacy after treatment compared to 66.67% (n=20) in Group B.ConclusionMicroneedling provided better treatment outcomes compared to 35% glycolic acid peels for acne scar treatment in our patient population with Fitzpatrick Skin Phototypes IV to VI.     

竹柏果皮和果壳中挥发油成分及其抗肿瘤活性研究

摘要目的 比较瑶药竹柏果皮和果壳中挥发油成分,并对两部位的挥发油进行抗肿瘤活性研究。方法应用水蒸气蒸馏法分别从竹柏果皮和果壳中提取挥发油,并结合气相色谱 质谱法分析其化学成分;采用噻唑蓝（MTT）法分别对果皮和果壳挥发油进行抗肿瘤活性研究。结果竹柏果皮挥发油收率为0.23%,分离出21种成分,鉴定18种,主要含有石竹烯,占挥发油总量的72.44%;竹柏果壳挥发油收率为0.15%,分离出15种成分,鉴定其中13种,与果皮共有4种成分;竹柏果皮和果壳挥发油对鼻咽癌细胞均具有抑制增殖活性,半数抑制浓度分别为54.58和114.83 μg·mL－1,果皮挥发油抑制活性较强。结论从竹柏果皮和果壳中提取挥发油主要成分为烯类、醇类、萜类,其中果皮挥发油具有较强的抗肿瘤活性。     

Yucatan Pig: An Optimal Hairless Model for a True Random Cutaneous Flap

Porcine models have been used extensively for skin flap research because of the established similarity between the cutaneous blood supply of the swine and humans. The Yucatan minipig provides an excellent model for researching the properties of random cutaneous flaps, offering several advantages over other breeds of swine. In this study, a total of 67 random cutaneous dorsal flank flaps measuring 4 × 14 cm were raised on nine Yucatan minipigs. The mean survival length (10.03 ± 1.60 cm) of the nondelayed flaps was greater than others reported in the literature. The well-defined plane between the subcutaneous tissue and the panniculus carnosus facilitated flap elevation consistently above the level of the panniculus carnosus thereby ensuring the creation of a true random cutaneous flap. Furthermore, the hairless nature of the skin, particularly beneficial in studying chemical peels, permits easy visualization and monitoring of any external skin changes. These advantages make the Yucatan minipig a more desirable alternative to other breeds of swine for use in skin flap research.     

Laser resurfacing with a long pulse erbium:YAG laser compared to the 950 ms pulsed CO(2) laser

BACKGROUND AND OBJECTIVE: Laser resurfacing with the 950 micros pulsed CO(2) laser is an effective treatment for photodamage and acne scarring; however, the potential for prolonged erythema and delayed re-epithelialization dissuade many patients from the procedure. With the use of erbium lasers alone, there is a decrease in the incidence and severity of these adverse sequelae; however, it is difficult to achieve the same degree of improvement as with the CO(2) laser because of the more superficial depth of resurfacing. Thus, new erbium lasers have been developed with longer pulse durations to deliver increased thermal effects to tissue. It is hypothesized that with the use of these lasers, diminished erythema and faster wound healing will be observed as well as enhanced clinical outcomes. STUDY DESIGN/MATERIALS AND METHODS: Sixteen patients were randomized to receive laser resurfacing on one-half of the face with the 950 micros pulsed CO(2) laser (UPCO(2)) followed by short pulse erbium:YAG ablation, and to the other half with a variable pulsed erbium laser (VP Er:YAG) followed by traditional short pulse erbium laser. Patients were evaluated clinically before resurfacing and at 1, 2, 4, 8, and 12 weeks post-operatively. Histologic samples taken at various time periods before and after resurfacing were also evaluated. RESULTS: Overall clinical improvement was equal for both UPCO(2) and VP Er:YAG treated sides with an average improvement in photoaging scores of 57%. Decreased erythema, less edema, and faster healing were observed on the VP Er:YAG treated side. CONCLUSION: The VP Er:YAG laser can achieve a similar degree of improvement as seen with short pulse CO(2) laser resurfacing with decreased thermal tissue effects and decreased risk for adverse sequelae.     

(iv) Metal-on-metal hip resurfacing

The management of an arthritic hip in young active patients represents a challenge to the treating orthopaedic surgeon. Results of the conventional hip arthroplasty in male patients under 55 have been shown to approach 70% survivorship at 10 years.¹ Hip resurfacing has many theoretical advantages including bone preservation, reduced risk of dislocation and increased range of movement that can benefit this particular group of patients. The results of early hip resurfacing prototypes did not meet expectations and failures were seen early on as a result of cup loosening and femoral collapse. Recently, hip resurfacing has been reintroduced with improved design, engineering and metallurgy. The early clinical results of the new Metal-on-Metal (MoM) resurfacing prostheses are encouraging. In its new design with hard MoM bearing surfaces, hip resurfacing can provide a valuable alternative in the armamentarium of the hip surgeon.     

磁共振化学位移成像对肾上腺肿瘤的诊断（附18例报告）

目的：评价磁共振（magnetic resonance,MR）化学位移成像（chemical shift imaging,CSI）对肾上腺腺瘤的诊断价值。方法：回顾分析我院18例肾上腺肿瘤患者,术前均进行了MR-CSI检查,对其病历资料及MR图象进行分析。结果：12例肾上腺腺瘤在MR—CSI同相位、反相位序列的检查中,均表现为反相位不同程度的信号减低,6例非腺瘤性病变反相位上不表现为明显的信号降低。结论：MR—CSI对肾上腺腺瘤与非腺瘤性病变的诊断与鉴别诊断具有重要价值。     

Treatment of acne scars using the plasma skin regeneration (PSR) system

BACKGROUND AND OBJECTIVES: Acne scarring is a common and difficult to treat condition. The plasma skin regeneration (PSR) system is a novel device that causes delayed ablation of the epidermis and controlled thermal modification to the underlying dermis. PSR has previously been shown to be a safe and effective treatment for facial rhytides and benign skin lesions. In this study, we investigated the safety and efficacy of single-treatment, high-energy, double-pass PSR for the treatment of acne scarring. STUDY DESIGN/MATERIALS AND METHODS: Ten patients with acne scarring and Fitzpatrick skin types I-III were included in the study. All patients underwent a single PSR treatment with two high-energy passes (3.5-4.0 J). Treatments were performed in an outpatient clinic setting. Nine patients completed 6 months of follow-up. Improvement was determined by patient questionnaires and physician evaluation of digital photographs taken prior to treatment and at 3 and 6 months post-treatment. RESULTS: On average, patients reported 34% improvement in their acne scarring at 3 months and 33% improvement at 6 months. Blinded physician ratings of patient photos demonstrated 19% improvement at 3 months and 34% at 6 months. Re-epithelialization was complete by 4-6 days after treatment, and no serious adverse events were encountered. CONCLUSION: PSR appears to provide a safe and effective single treatment, minimal downtime alternative for the treatment of acne scarring. Additional studies are warranted to further demonstrate the safety and efficacy of this device.     

锌-金属硫蛋白对大鼠皮肤烫伤创面的影响

目的研究 Wistar 大鼠深Ⅱ度烧伤后皮肤活力的下降与脂质过氧化反应的关系。方法以氧耗量、琥珀酸脱氢酶、Schiff's 碱及创面愈合时间为指标,以金属硫蛋白作为保护剂外用于烫伤创面,分别采用空白对照及5×10~(-6)mol/L,1×10~(-5) mol/L 两种浓度,测定伤后8,24,48h 各项指标的变化。结果皮肤氧耗量、琥珀酸脱氢酶活性下降,Schiffs 碱含量明显升高。应用金属硫蛋白保护后,皮肤活性(氧耗及琥珀酸脱氢酶含量)均显著高于对照组(P<0.05或 P<0.01),同时Schiff's 碱含量下降(P<0.05或 P<0.01),创面愈合时间平均提前2天。结论烫伤组织损伤与脂质过氧化反应有一定的关系,而金属硫蛋白有一定保护作用。     

Healing efficacy of sea buckthorn (Hippophae rhamnoides L.) seed oil in an ovine burn wound model

To investigate the efficacy of sea buckthorn (SBT) seed oil – a rich source of substances known to have anti-atherogenic and cardioprotective activity, and to promote skin and mucosa epithelization – on burn wound healing, five adult sheep were subjected to 3rd degree flame burns. Two burn sites were made on the dorsum of the sheep and the eschar was excised down to the fascia. Split-thickness skin grafts were harvested, meshed, and fitted to the wounds. The autograft was placed on the fascia and SBT seed oil was topically applied to one recipient and one donor site, respectively, with the remaining sites treated with vehicle. The wound blood flow (LASER Doppler), and epithelization (ultrasound) were determined at 6, 14, and 21 days after injury. 14 days after grafting, the percentage of epithelization in the treated sites was greater (95 ± 2.2% vs. 83 ± 2.9%, p < 0.05) than in the untreated sites. Complete epithelization time was shorter in both treated recipient and donor sites (14.20 ± 0.48 vs. 19.60 ± 0.40 days, p < 0.05 and 13.40 ± 1.02 vs. 19.60 ± 0.50 days, p < 0.05, respectively) than in the untreated sites, confirmed by ultrasound. In conclusion, SBT seed oil has significant wound healing activity in full-thickness burns and split-thickness harvested wounds.