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Objective@#To analyze dermoscopic features of blue nevi.@*Methods@#Clinical and dermoscopic data were collected from patients with confirmed blue nevi in the Department of Dermatology and Venereology, Wuxi People′s Hospital from January 2008 to May 2018, and analyzed retrospectively. Chi-square test was used to analyze differences between groups.@*Results@#Totally, 65 patients with 66 skin lesions were enrolled into this study. A total of 23 skin lesions were subjected to dermoscopy, which showed homogeneous pattern in 20 (87.0%) lesions, pseudo-pigment network pattern in 2 (8.7%) lesions, and cerebriform pattern in 1 (4.3%) lesion, and the homogeneous pattern was more common than the other patterns (χ2 = 8.79, P < 0.05) . Under the dermoscope, 10 lesions were monochromatic (43.5%) , 11 were dichromatic (47.8%) , and 2 were multichromatic (8.7%) . Scar-like hypopigmentation was observed in 4 lesions (17.4%) , and vascular structures were observed in 5 (21.7%) , including punctate vessels in 4 (17.4%) and linear irregular vessels in 1 (4.3%) . Papillary hyperplasia was observed in 2 lesions (8.7%) . Additionally, pigmentation around lesions, white streaks, dots/globules, blotches, comedo-like openings were observed in 1 lesion (4.3%) each.@*Conclusions@#Blue homogeneous pattern is the most common dermoscopic feature of blue nevi. Pseudo-pigment network pattern, cerebriform pattern, scar-like hypopigmentation, multiple vascular patterns, papillary hyperplasia, white streaks, dots/globules, blotches, comedo-like openings can also be observed in blue nevus lesions.
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Obective To evaluate the effects of dihydrotestosterone (DHT) on the expression of sterol regulatory element-binding protein-1c (SREBP-1c) in human HaCaT keratinocytes.Methods HaCaT cells were cultured in vitro and classified into 4 groups,i.e.,control group receiving no treatment,DIIT group treated with 3 different concentrations (10,100,1000 nmol/L) of DHT,LY294002 plus DHT group treated with DHT of 100 nmol/L after 40-minute pretreatment with the PI3K inhibitor LY294002 of 50 μmol/L,PD98059 plus DHT group treated with DHT of 100 nmol/L after 40-minute pretreatment with the MEK inhibitor PD98059 of 50 μmol/L.After another 24-hour culture,real time PCR and Western blot were carried out to detect the expression of SREBP-1c mRNA and protein in HaCaT cells,respectively.Western blot was also performed to determine the phosphorylation levels of protein kinase B (AKT),extracellular signal-regulated kinase (ERK),p38 mitogen activated protein kinase and c-Jun N-terminal kinase (JNK) in the HaCaT cells.Results DHT could enhance the expression of SREBP-1c mRNA and protein in HaCaT cells in a concentration-dependent manner,and induce the phosphorylation of AKT and ERK,but not that of P38 or JNK.The expressions of SREBP-1c mRNA and protein were significantly decreased in HaCaT cells treated with LY294002 plus DHT (7.4780 ± 1.2638 vs.21.6170 ± 2.2759,t =9.406,P ＜ 0.05; 0.7113 + 0.0313 vs.2.2577 + 0.0601,t =39.498,P ＜ 0.05),but experienced no statistical changes in those treated with PD98059 and DHT(both P ＞ 0.05),compared with those treated with DHT only.Conclusion DHT can induce the expression of SREBP-1c mRNA and protein in HaCaT cells,likely via the PI3K/AKT signaling pathway.
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ObjectiveTo observe the effect of topical sulfotanshinone sodium(STS) on sebaceous hyperplasia in animal models. MethodsThe sebaceous gland spots of adult male Syrian hamster flank organ served as the animal model. Sulfotanshinone sodium(0.5％) was applied to sebaceous gland spots in the right flank organ thrice daily, while those in the left were treated with normal saline as control. Parameters were examinedbefore, 10 days, 20 days and 30 days after the beginning of the topical treatment. A vernier caliper was utilized to measure the size of sebaceous gland spots, hematoxylin and eosin(HE) staining to observe the structure of sebaceous glands, immunohistochemistry to determine the expression of proliferating cell nuclear antigen (PCNA) in sebaceous gland cells, terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) assay to assess the apoptosis of sebaceous gland cells. ResultsAt the baseline, no significant difference was observed in the size of sebaceous gland spots or in the proliferation and apoptosis of sebaceous gland cells between the two sides of flank organ(all P ＞ 0.05), with tightly arranged intact sebaceous glands. Compared with normal saline, sulfotanshinone sodium significantly reduced the size of sebaceous gland spots(P ＜ 0.05). Sebaceous glands were loosely arranged with decreased quantity and volume and obviously atrophic on day 30 in the right flank organ of hamsters. A decrease was observed in the expression of PCNA in sulfotanshinone sodium treated sebaceous gland cells compared with those treated with normal saline(P ＜ 0.01 ), which was more striking on day 10 and 20(both P ＜ 0.005). Sulfotanshinone sodium also induced an enhancement of apoptosis in sebaceous gland cells (P ＜ 0.01 ), which was more apparent on day 20 (P ＜ 0.005 ), and the degree of apoptosis was higher in the central area than in the peripheral area of sebaceous glands. ConclusionSulfotanshinone sodium can reduce the size and alter the microstructure of sebaceous gland spots, and inhibit the hyperplasia of sebaceous glands.