阻断NHE1抑制人胶质母细胞瘤细胞增殖和侵袭的研究

目的分析Na⁺/H⁺交换蛋白1（NHE1）抑制剂对癌基因BRAF野生型（BRAF^WT）和激活型BRAF^V600E突变的胶质母细胞瘤（GBM）细胞生长和侵袭能力的影响。 方法NHE1抑制剂Cariporide分别处理U251（BRAF^WT）和AM38（BRAF^V600E）GBM细胞系，乙酰甲酯化的2’,7’-双（2-羧乙基）-5（6）-羧荧光素荧光探针处理细胞并采用紫外分光光度计检测细胞在440 nm与490 nm的荧光强度，计算荧光强度比值以反映NHE1的活性，MTT法检测细胞增殖活性，基质胶-Transwell实验检测细胞侵袭能力。 结果AM38细胞的NHE1活性、增殖和侵袭能力均显著高于U251细胞，差异均有统计学意义（P=0.006、0.010、0.047）；Cariporide处理的U251和AM38细胞的NHE1活性、增殖和侵袭能力均显著低于溶剂二甲基亚砜处理的U251和AM38细胞，差异均有统计学意义（U251：P=0.012、0.023、0.044；AM38：P=0.006、0.001、0.038）。 结论采用Cariporide阻断NHE1活性可有效抑制BRAF^WT和BRAF^V600E突变型GBM细胞的增殖和侵袭。     

脾阳虚、肾阳虚亚健康状态人群的面诊图像特征分析研究＊

目的 研究脾阳虚、肾阳虚亚健康状态人群的面象特征，探讨面象特征在中医亚健康状态辨识中的诊断价值。方法 使用便携式中医智能镜采集体检人群面象样本，最终纳入脾阳虚亚健康者1450例、肾阳虚亚健康者1666例、健康者1844例，采用图像分析技术分析比较3组人群的面色、唇色等面象特征参数之间的差异。结果 肾阳虚人群的面色L值 > 脾阳虚人群（P < 0.05），肾阳虚人群的面色a、b值 < 脾阳虚人群（P < 0.05）；肾阳虚人群的唇色L值 > 脾阳虚人群 > 健康人群（P < 0.05），肾阳虚人群的唇色a、b值与脾阳虚人群无明显差异；脾阳虚、肾阳虚亚健康状态人群面部光泽度较健康人群均降低（P < 0.05）。结论 面诊图像特征可作为脾阳虚、肾阳虚亚健康人群的判别标准之一，为中医体质辨识提供了重要的面诊参数量化指标，为不同体质人群的健康状态评价及疾病的预防提供有效依据。     

A near-infrared fluorescent pH sensing film for wound milieu pH monitoring

Studies have shown that wound pH is a potentially influential factor in the healing process. Due to the flaws of traditional pH measurement approaches, wound pH measurement has not become part of current standard of care. A near-infrared pH-sensitive ratiometric film was created and characterized for measuring wound pH. This film was fabricated by physically absorbing poly (N-isopropyl Acrylamide) nanoparticles conjugated with pH-sensitive (CypHer5E) and pH-insensitive (Cy7) fluorescent dyes into 2-hydroxyethyl methacrylate hydrogel film. The pH pattern on wounds can be indirectly measured by pressing freshly discarded wound dressing on top of the pH-sensitive film and imaging it. In vitro tests show that the film can accurately and rapidly detect a wide range of pH (from pH 4 to 8) in wound milieu. Further, patient studies showed that, by measuring pH on wound contact side of discarded wound gauze, the pH and its non-homogeneous distribution on wounds can be indirectly determined. By comparing patients with different wound conditions, we find that near-infrared pH sensing film can be used to measure wound exudate pH with high accuracy and efficiency. In addition, wound pH determination can provide an accurate assessment of wound healing activity in real time.     

Severe epidermolysis bullosa simplex phenotype caused by codominant mutations p.Ile377Thr in keratin 14 and p.Gly138Glu in keratin 5

Epidermolysis bullosa simplex (EBS) is a rare skin disease usually inherited in an autosomal dominant pattern. EBS is resulting from mutations in keratin 5 (KRT5) and keratin 14 (KRT14) genes encoding the keratins 5 and 14 proteins expressed in the keratinocytes of the basal layer of the epidermis. To date, seven pathogenic mutations have been reported to be responsible for EBS in the Canadian population from the province of Quebec: p.Pro25Leu, p.Leu150Pro, p.Met327Thr and p.Arg559X in KRT5; p.Arg125Ser, p.Ile377Thr and p.Ile412Phe in KRT14. Here, we present a novel French-Canadian patient diagnosed with EBS confined to the soles but presenting a severe complication form including blisters, hyperkeratosis, skin erosions and toenail abnormalities. Mutation screening was performed by direct sequencing of the entire coding regions of KRT5 and KRT14 genes and revealed the previously reported missense heterozygous mutation c. 1130T > C in KRT14 (p.Ile377Thr). Furthermore, this patient is carrying a second mutation in KRT5, c.413G > A (p.Gly138Glu), which has been linked to an increased risk of basal cell carcinoma in the literature. We suspect an impact of the p.Gly138Glu variant on the EBS phenotype severity of the studied patient. The pathogenicity and consequences of both genetic variations were simulated by in silico tools.     

医护人员肌肉骨骼疾病发生现状及其影响因素分析

目的 分析医护人员肌肉骨骼疾病发生现状及其影响因素，为制定干预措施提供依据。方法 以长沙市某医院在本单位工作≥1年的全体医护人员为研究对象进行肌肉骨骼疾病患病情况及相关因素问卷调查。采用描述流行病学分析方法进行分析，并采用单、多因素分析方法对医护人员肌肉骨骼疾病患病影响因素进行分析。结果 本研究共对全院医务人员802人进行调查。男女性别比为0.8∶1，年龄18～65岁，以18～29岁人群为主，占56.61%，护理部门占58.10%。802名医护人员中有260例（占32.42%）患有肌肉骨骼疾病，能够自行缓解202例（占77.69%）。多因素分析结果显示，女性（OR＝1.376）、护理和医疗辅助部门（OR＝3.216、3.149）、年龄越大（OR＝3.435）、工作年限越长（OR＝2.759）、焦虑症状（OR＝3.177）、工作空间狭窄（OR＝2.563）、搬动重物情况≥5次/d（OR＝3.501）的医护人员肌肉骨骼疾病患病风险较高，锻炼情况在1～3次/周和≥4次/周（OR＝0.358、0.150）的医护人员肌肉骨骼疾病患病风险较小。结论 医护人员肌肉骨骼疾病发生率较高，其影响因素较多，医疗相关部门应针对其采取相应的干预措施，以降低医护人员肌肉骨骼疾病的发生风险。