温热治疗HPV病毒感染皮肤的异常“再生”

人体皮肤的最外层称为表皮,主要由角质形成细胞形成复层鳞状上皮结构。常态下,表皮生发于单层排列的基底细胞干细胞,渐次增殖分化为棘细胞层、颗粒细胞层和角质层(见图1右),这个过程大约需要2周;由死亡的角质形成细胞叠层构成的角质层再经过大约2周时间自然脱落。表皮的物理特性使其具有屏障环境中致病微生物侵袭的作用,以其中的角质层的作用为主;更重要的是,皮肤组织本身(包括表皮及其下的真皮和皮下组织),或与机体免疫系统协同,具备识别和清除外来致病因子的能力。当免疫功能缺陷或受损,易发生慢性感染。

Decreased invasion ability of hypotaurine synthesis deficient glioma cells was partially due to hypomethylation of Wnt5a promoter

Glioma is one of the lethal central nervous system tumors.The infiltrative and invasive growth nature makes it difficult to identify the boundary between glioma and the normal tissues,resulting in inevitable recurrence after surgery operation.Gliomas do not metastasize,so to prevent the residual tumor from proliferating or invading is a key challenge.Previous report indicated that hypotaurine could facilitate glioma invasion and suppress demethylases’activities.Using a hypotaurine synthesis deficient U251 cell line,we proved that the cells invasion ability was impaired.Gene expression profile analysis exhibited that knocking down one of the key enzymes of hypotaurine synthesis,2-aminoethanethiol dioxygenase(ADO),significantly affected the extracellular matrix-receptor process.Of that process,Wnt5a expression was severely upregulated by decreased intracellular ADO expression.Cells cultured at the presence of hypotaurine showed a decrease in intracellular Wnt5a protein and mRNA levels.This phenotype was due to hypermethylation of Wnt5a promoter,which was most likely the result of hypotaurine’s inhibiting demethylases activities.Collectively,this study demonstrated that hypotaurine synthesis deficient U251 cells were prone to epigenetic modification and Wnt5a seemed to be a tumor suppressor under that circumstance.This tumor suppression effect is warranted to be reevaluated in real tumor samples and the relevant evidence might contribute to develop new glioma interference strategies.

Ageing-Related Features of Hair and Scalp in Chinese Women by Clinical Evaluation Study

There are previous studies of ageing hair and scalp in Caucasians and some Asians, such as Koreans and Japanese. However, the characteristics of scalp and hair have not yet been studied in Chinese, the largest population in the world, especially in terms of ageing. The purpose of this study is to investigate ageing features in Chinese women’s hair and scalp. Methods: In total, 1343 women in China aged 20 to 65 participated in this research. Hair density and diameter were measured and analysed with Folliscope&reg. Hair color and scalp conditions such as dandruff and erythema were evaluated through microscopic images. Measuring equipment was also used to detect scalp water content, barrier function and sebum secretion. Results: Hair density decreased gradually with ageing, while hair diameter peaked at 40s. The color of hair became bright with ageing because of gray hair and color fading. The degree of scalp sebum and dandruff was higher at younger ages. Interestingly, scalp erythema became more severe with ageing. Conclusion: This study shows the physical and physiological changes of Chinese women’s hair and scalp. Most aging features (hair diameter, scalpsebum contents, dandruff and erythema) were noticeable in their 40s, but hair density began to decline in their 30s. This first study of aging hair and scalp in Chinese women would be helpful for understanding the ageing phenomenon and development of hair and scalp care products.

Amelanotic Malignant Melanoma Mimicking Hemangioma of the Hand: One Case Report and Literature Review

Introduction Malignant melanoma （MM） is one of the most deadly cancerst. Although the disease accounts for only about 4% of skin cancer related cases, it is responsible for about 79% of skin cancer deaths. Early diagnosis of MM is, therefore, essential for appropriate treatment decision and, in turn, may give patients the best chance for prolonged survival. About 6% to 8% of malignant melanomas lack typical pigmentation and tend to be managed as benign lesions, making accurate early diagnosis difficultt61. Though subungual MM is rare,

Chinese expert consensus on the diagnosis and treatment of balanoposthitis

Balanoposthitis(BP),a common male genitalia inflammation,is managed by clinicians from different specialties,including urology,pediatrics,dermatology,and venereology.Due to this diverse array of clinicians involved,there exists a lack of consistent,evidence-based recommendations for BP.The development of the consensus engaged 19 representative hospitals and it adhered to rigorous protocols,encompassing international registration(IPGRP-2021CN003)and the application of evidence grading criteria and recommendation standards[Appendix S1,Supplementary File,http://links.lww.com/CM9/C42].Over the period from December 2020 to October 2022,consensus on 12 clinical issues was reached through comprehensive evidence searches and two iterations of Delphi surveys[Supplementary File,http://links.lww.com/CM9/C42].

Development of the Scientific,Transparent and Applicable Rankings (STAR) tool for clinical practice guidelines

Background:This study aimed to develop a comprehensive instrument for evaluating and ranking clinical practice guidelines,named Scientific,Transparent and Applicable Rankings tool(STAR),and test its reliability,validity,and usability.Methods:This study set up a multidisciplinary working group including guideline methodologists,statisticians,journal editors,clinicians,and other experts.Scoping review,Delphi methods,and hierarchical analysis were used to develop the STAR tool.We evaluated the instrument’s intrinsic and interrater reliability,content and criterion validity,and usability.Results:STAR contained 39 items grouped into 11 domains.The mean intrinsic reliability of the domains,indicated by Cronbach’sαcoefficient,was 0.588(95%confidence interval[CI]:0.414,0.762).Interrater reliability as assessed with Cohen’s kappa coefficient was 0.774(95%CI:0.740,0.807)for methodological evaluators and 0.618(95%CI:0.587,0.648)for clinical evaluators.The overall content validity index was 0.905.Pearson’s r correlation for criterion validity was 0.885(95%CI:0.804,0.932).The mean usability score of the items was 4.6 and the median time spent to evaluate each guideline was 20 min.Conclusion:The instrument performed well in terms of reliability,validity,and efficiency,and can be used for comprehensively evaluating and ranking guidelines.

Burden of vitiligo on Chinese patients:An online survey

To the Editor:Vitiligo is a chronic disease that impacts many aspects of a patient’s life.The prevalence of vitiligo has been increasing,and currently involves up to 0.5%to 2%of all races worldwide.[1]Although this condition very rarely produces any direct physical discomfort,the cosmetic problems and disfiguring appearance resulting from the depigmented lesions severely affect the quality of life(QoL)in these individuals.

G-quadruplexes folding mediates downregulation of PBX1 expression in melanoma

Dear Editor,Pre-B-cell leukemia homeobox transcription factor 1(PBX1)is identified at t(1;19)chromosomal translocations in acute pre-B-cell leukemia and is involved in regulating multiple biological processes.1 Importantly,accumulating evidence have suggested that dysregulation of PBX1 have been shown to be involved in tumorigenesis,poor prognosis and drug resistance.1 It has been shown that the expression of PBX1 is increased in melanoma cells and overexpression of PBX1 significantly promotes the melanoma cell growth.

In-situ formation of“electron conductive wires”threaded ZIF-8 membrane for multiplexed immunoassay of human interleukins

To address the challenge of highly sensitive and accurate detection of biomarkers in complex environments,a rational engineering strategy for designing electrochemical immunosensing platform is proposed.Herein,we develop a microsensor chip through the combination of multiplexed electrodes and microfluidic channels for the parallel detection of human interleukins(IL-6 and IL-8).For the construction of an efficient sensing interface,the conductive silver nanowires(Ag NWs)wrapped with zeolitic imidazolate framework(ZIF-8)thin film(denoted as ZIF-8@Ag NWs)are prepared,and then employed for the multi-functionalization of electrodes.The immunodetection of ILs is based on the direct signal transduction ability of Ag NWs and specific interaction of periodically arranged Zn2+ions in ZIF-8 films with biomolecules,which offer the high assay sensitivity and good specificity.The immunosensor chip achieves a wide detection range from pg/mL to ng/mL and possesses the ability to resist non-specific proteins adsorption in biological complex media.Further clinical serum samples assay verifies that the combination of IL-6 and IL-8 levels yields high diagnostic accuracy.Principal component analysis(PCA)reveals that 18 patient samples could be fully separated from healthy control samples.The low-cost,easily fabricated electrochemical immunosensing platform provides a rapid serum test for diagnosis and personalized therapy of inflammatory diseases,and can also be generalized to other immunoreaction-based biomarkers detections.

Facile fabrication of drug-loaded PEGDA microcapsules for drug evaluation using droplet-based microchip

Droplet-based microfluidic technology can be utilized as a microreactor to prepare novel functional monodisperse microcapsules.In this study,a droplet-based microfluidic chip with surface modification,which allowed the one-step preparation of double emulsion microcapsules.An O/W/O double emulsion using polyethylene(glycol)diacrylate(PEGDA)solution as the intermediate water phase was prepared by regulating the hydrophilicity and hydrophobicity of the chip surface,with PEGDA microcapsules prepared using UV polymerization.And then anti-tumor drug paclitaxel and neurotoxin 6-OHDA were encapsulated in microcapsules for drug and toxicology evaluation,respectively.Compared to controls,drug-loaded mi-crocapsules caused a significant increase in the death rate of PC12 cells.This indicates that the obtained drug-loaded microcapsules could be used in drug evaluation and potentially in drug screening and deliv-ery.

RhIr@MoS2 nanohybrids based disposable microsensor for the point-of-care testing of NADH in real human serum

Dihydronicotinamide adenine dinucleotide(NADH)is an important enzyme in all living cells,which is found to be abnormally expressed in cancer cells.Since it is redox-active,an electrochemical detection method would be suitable for monitoring its concentration in biological fluids.Here we present a strategy for specific determination of NADH in real human serum by using RhIr@MoS2 nanohybrids based microsensor.To implement the protocol,RhIr nanocrysrals are in-situ grown onto MoS2 interlayers forming a nanohybrid structure(RhIr@MoS2).After being locally deposited on an electrochemical microsensor,it could be used for the analysis of NADH.The developed RhIr@MoS2 nanohybrids based microsensor possesses the ability for analyzing NADH at the applied potential of 0.07 V(much lower than most reported values).The detection limit is evaluated as low as 1 nmol/L even in bovine serum albumin(BSA)media.In addition,the sampling analysis of human serum from cancer patients and health controls shows that the microsensor displays good diagnostic sensitivity and specificity,illustrating that this developed detection technique is a relatively accurate method for measuring NADH in biological fluids.The proposed electrochemical microsensor assay also owns the benefits of convenience,disposable and easy processing,which make it a great possibility for future point-of-care cancer diagnosis.