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1.
人类皮肤作为抵御外界病原体入侵的第一道防线,寄居着许多参与防御和免疫反应的微生物,这些微生物帮助维持皮肤健康。特应性皮炎是一种慢性、复发性和炎症性疾病,以皮肤干燥、湿疹样皮炎和瘙痒为主要特征,与皮肤微生态的失衡密切相关。当前,特应性皮炎的治疗主要以抗炎、止痒、调节免疫和提高生活质量为主。“肠道−皮肤轴”的概念提示肠道微生态与皮肤微生态密切相关,揭示调节肠道菌群可能有助于特应性皮炎的治疗。因此,研究皮肤微生态与特应性皮炎的关系,有助于我们深入理解二者之间的相互影响,并为特应性皮炎的诊断和治疗提供新的思路。 相似文献
2.
特应性皮炎(atopic dermatitis,AD)是会反复发作、具有明显遗传倾向性的慢性炎症性皮肤病,发病率逐年增高.AD的发病机制主要为遗传性或获得性皮肤屏障受损引起的皮肤微生态失衡和变应原渗漏,激活对应的炎症反应,造成\"屏障受损-炎症反应\"的恶性循环.AD的传统治疗方法多采用糖皮质激素和免疫抑制剂,但其副作用的... 相似文献
3.
肠道微生物群是定植于人类肠道内的微生物群体,包括细菌、真菌和病毒等。普拉梭菌是一种常见的肠道细菌,在维持肠道菌群平衡和人体免疫系统中发挥重要作用。特应性皮炎是一种慢性炎症性皮肤病,肠道菌群失调与特应性皮炎的发生和发展有关。普拉梭菌作为肠道菌群的重要成员,其变化会导致特应性皮炎患者的免疫反应紊乱和皮肤炎症加重。近年来利用普拉梭菌治疗特应性皮炎的研究还处于动物研究阶段,未来的研究应进一步揭示普拉梭菌与特应性皮炎之间的复杂关系,并为治疗特应性皮炎开发新的策略提供有益的见解。 相似文献
4.
特应性皮炎(atopic dermatitis,AD)是儿童常见的皮肤过敏性疾病,虽然临床表现多样,但基本特征是全身皮肤干燥、慢性湿疹样损害和剧烈瘙痒表现[1]。近十年余中国儿童的AD患病率显着提高,2002年顾恒等[2]对中国的10个城市进行学龄前儿童特应性皮炎现况调查,研究结果发现学龄前儿童AD患病率为2.78%,而在2014年一项对中国12个城市的流行病学调查中发现AD则已影响了30.48%的婴儿以及12.94%的幼儿与学龄前儿童[3-4]。 相似文献
5.
近年来,对马拉色菌与免疫系统之间关联的研究明显增加,其重要内容是马拉色菌在特应性皮炎发病中的作用。本文主要概述近期一些研究中对马拉色菌与树突状细胞、角质形成细胞间的关联性及其在特应性皮炎发病的免疫学机制中的作用所获得的进展。 相似文献
6.
特应性皮炎(atopic dermatitis, AD)是一种以反复发作和严重瘙痒为特征、发病率最高的过敏性皮肤病。AD的致病机制涉及遗传易感性、表皮屏障功能障碍、微生物组失调、免疫反应失衡以及环境等多个因素,而现有治疗用药副作用大、疗效欠佳。目前研究已发现肠道菌群尤其是益生菌在AD中起着重要作用。益生菌能够通过抑制病原菌、增强屏障功能、改善肠道环境和平衡Th1/Th2免疫应答等机制改善AD症状。本文综述了AD患者皮肤及肠道微生态特征,基于AD发病的致病机制和影响因素,系统阐明益生菌缓解AD的机制,以期为益生菌治疗AD及相关皮肤过敏性疾病提供理论支持。 相似文献
7.
目的系统评价益生菌对婴儿期特应性皮炎的预防作用。方法计算机检索中英文数据库,检索时限从建库到2017年12月,收集益生菌对婴儿期特应性皮炎预防的临床随机对照试验的文献,由2名研究员筛选文献及质量评价,采用RevMan 5.3软件进行Meta分析。结果最终纳入质量较高的20个研究,共3 701例患儿。结果显示:益生菌组特应性皮炎发生率低于对照组,两组差异具有统计学意义(RR=0.74,95%CI:0.64~0.86,P0.01)。进一步亚组分析后发现仅产前母亲或产后婴儿口服益生菌对婴儿期特应性皮炎无预防作用(RR=0.91,95%CI:0.62~1.33,P=0.62;RR=0.91,95%CI:0.71~1.16,P=0.43),而在两者均服用益生菌的比较中发现单独服用乳酸菌类或与其他益生菌混合服用同安慰剂组比较均具有预防作用(RR=0.70,95%CI:0.52~0.94,P0.05;RR=0.65,95%CI:0.50~0.86,P0.01)。结论孕母及产后婴儿均补充益生菌对婴儿期特应性皮炎具有预防作用,单独服用临床常用的乳酸菌类或与其他益生菌混合服用同样具有保护作用,但由于国内外菌株、种群差异等诸多因素,其对婴儿期特应性皮炎的保护机制在国内尚需进一步研究。 相似文献
8.
目的 探讨益生菌辅助治疗对儿童中重度特应性皮炎(AD)的临床疗效。 方法 选择于首都儿科研究所附属儿童医院皮肤科就诊的96例中重度AD患儿为研究对象。入选患儿随机分成两组,其中试验组(50例)患儿给予口服乳杆菌及我院皮肤科AD常规药(口服抗组胺药,外用糠酸莫米松乳膏、我院自制肤乐霜);对照组(46例)患儿仅给予我院皮肤科AD常规药。两组患儿均治疗3个月,治疗前后分别用SCORAD评分、CDLQI评分、DFIQ评分进行病情评估,同时检测两组患儿治疗前后的血清总IgE、IL2受体、IL4、嗜酸细胞阳离子蛋白(ECP)水平及Th1/Th2比值。 结果 治疗后,SCORAD评分显示实验组患儿总有效率为82.0%(41/50),对照组总有效率为52.2%(24/46),两者差异有统计学意义(χ2=6.448,P=0.011)。治疗后,试验组患儿SCORAD评分、CDLQI评分、DFIQ、总IgE水平低于对照组(t=4.656,4.189,3.097、2.278;P0.05)。 结论 中重度AD患儿在常规治疗上基础上补充益生菌,可显著降低血清IgE水平,减轻AD患儿的症状,提高疗效。 相似文献
9.
皮肤和人体微生物群相互作用,关系复杂。特应性皮炎(atopic dermatitis,AD)是一种常见的慢性和易复发性疾病,与机体的内部和外部环境相关,发病率呈上升趋势。AD的发生往往会改变人体微生物群的组成和数量,微生物群的定植在AD的发生和发展中起着主要作用。本文就人体微生物群与AD的关系、基于皮肤微生物群的AD研究及基于肠道微生物群的AD研究三方面进行综述,主要阐述了皮肤微生物群和肠道微生物群与AD的关系,重点讨论金黄色葡萄球菌在AD发生中的作用以及益生菌等微生物在AD治疗中的重要作用,以期为AD的防治提供新的思路。 相似文献
10.
目的 探究哺乳期补充鼠李糖乳杆菌对婴幼儿湿疹以及特应性疾病的预防作用。方法 选择2015年1月至2016年12月间于我院分娩和定期体检的哺乳期妇女及其新生儿152例,随机数表法分为对照组(76例)和实验组(76例),对照组采用常规哺乳期婴幼儿湿疹预防策略,实验组在此基础上补充鼠李糖乳杆菌。比较两组婴儿的免疫学指标(嗜酸性粒细胞百分比,IgE和特异性IgE)水平、皮肤点刺试验(SPT)阳性率及24个月内湿疹以及特应性疾病的发病情况。结果 实验组6个月后的EOS%、IgE、sIgE均明显低于对照组(均P<0.05);对照组和实验组的SPT阳性率分别为15.79%和5.26%,差异有统计学意义(χ2=4.471,P=0.034)。实验组婴幼儿肠道菌群中双歧杆菌、乳杆菌明显多于对照组(t=6.173,5.070,均P<0.001),而肠球菌及肠杆菌明显少于对照组(t=5.111,5.919,均P<0.001)。对照组婴幼儿的湿疹累积发病率为38.16%(29/76),实验组的湿疹累积发病率为25.00%(19/76),实验组的湿疹发病率明显低于对照组(Log-rank χ2=3.949,P=0.047)。对照组和实验组婴幼儿的特应性疾病累积发病率分别为17.11%(13/76)和6.58%(5/76),实验组的发生风险明显低于对照组(Log rank χ2=4.275,P=0.039)。结论 哺乳期补充鼠李糖乳杆菌能够有效调节肠道菌群,降低婴幼儿2岁以内的湿疹以及特应性疾病发生风险。 相似文献
11.
The purpose of this study was to investigate the immunoregulatory potential of Hsp60 in the skin of dogs with atopic dermatitis. Three dogs with chronic atopic dermatitis and four healthy dogs were injected intradermally with Hsp60 and phosphate-buffered saline. Biopsies were taken before testing from non-injected control skin, lesional and non-lesional atopic skin, and 48 and 72 h after injection. Analysis of cytokine messenger RNA was performed using quantitative real-time polymerase chain reaction. Forty-eight hours after Hsp60 injection, a rise in interleukin (IL)-10 was found (P = 0.034) with the highest expression levels in non-lesional atopic and control skin. A rise of transforming growth factor beta (P = 0.015) and IL-12p40 (P = 0.017) was noticed 72 h after Hsp60 injection in control skin. No significant differences were observed for the expression of IL-4, IL-12p35, and interferon gamma. The results indicate that Hsp60 is able to induce cytokines of a regulatory and Th1 phenotype in the skin. Furthermore, this study seems to provide a first indication of deficient Hsp60 response in atopic dermatitis affected skin. 相似文献
12.
摘要 目的:分析不同严重程度儿童特应性皮炎血清半乳糖凝集素-10(Gal-10)及炎症因子的表达水平及其与皮肤感染的相关性。 方法:选择我院自2022年1月至2023年1月收治的110例特应性皮炎患儿纳入观察组,根据特应性皮炎评分(SCORAD),分为轻度组、中度组和重度组;另选110例健康体检儿童纳入对照组。检测所有入选者血清Gal-10、炎症因子(IL-4、IL-13、IL-31)水平及不同部位皮肤经皮失水量,分析血清Gal-10、IL-4、IL-13、IL-31与SCORAD评分、不同部位皮肤经皮失水量的关系,使用受试者工作特征曲线(ROC)分析血清Gal-10、炎症因子(IL-4、IL-13、IL-31)对皮肤感染的预测效能。 结果:观察组血清Gal-10、IL-4、IL-13、IL-31水平均高于对照组(P<0.05);随着儿童特应性皮炎病情加重,患儿血清Gal-10、IL-4、IL-13、IL-31水平随之升高,血清Gal-10、IL-4、IL-13、IL-31水平在轻度组、中度组和重度组中差异显著(P<0.05);经Pearson相关性分析,特应性皮炎患儿血清Gal-10、IL-4、IL-13、IL-31水平与SCORAD评分,前壁伸侧、前壁屈侧、脸颊及胫前的经皮失水量呈正相关(P<0.05);在110例特应性皮炎患儿中,发生皮肤感染43例;经ROC曲线分析,血清Gal-10、IL-4、IL-13联合IL-31预测特应性皮炎患儿发生皮肤感染的敏感度为89.72%、特异度为56.97%、ROC曲线下面积(AUC)为0.921。 结论:血清Gal-10、炎症因子(IL-4、IL-13、IL-31)水平与儿童特应性皮炎严重程度有显著相关性,对于评估其皮肤屏障功能和预测皮肤感染均具有一定作用,值得临床予以重视应用。 相似文献
13.
AimsAtopic dermatitis (AD) is a chronic and relapsing inflammatory dermatitis characterized by pruritic and eczematous skin lesions. Here, we investigated the therapeutic effect of the fruit flavonoid naringenin on DNFB induced atopic dermatitis mice model. Main methodsAD-like skin lesion was induced by repetitive skin contact with DNFB in NC/Nga mice and the effects of the fruit flavonoid naringenin were evaluated on the basis of histopathological findings of skin, ear swelling and cytokine production of CD4 +T cells. Key findingsIntraperitoneal injection of naringenin for one week after DNFB challenge significantly lowered ear swelling and improved back skin lesions. In addition, naringenin significantly suppressed production of interferon-gamma (IFN-γ) by activated CD4 + T cells and serum IgE level. Furthermore, naringenin reduced DNFB-induced infiltration of eosinophils, mast cells, CD4 + T cells, and CD8 + T cells in skin lesions. SignificanceNaringenin may suppress the development of AD-like skin lesions in DNFB-treated NC/Nga mice by reducing IFN-γ production of activated CD4 + T cells, serum IgE levels and infiltration of immune cells to skin lesion. 相似文献
14.
BackgroundIn the latest decades, epidemiological studies on allergic disorders in children, including atopic dermatitis, rhinitis and asthma, demonstrated a continuous increase in prevalence. However, such studies are usually performed by questionnaires and, sometimes, by skin prick test or in vitro IgE tests, while the portion of allergy sustained by the cell-mediated mechanism is neglected, because the essential test, i.e. the atopy patch test is not performed. MethodsThis cross-sectional survey studied by a specific questionnaire, skin prick test and atopy patch test, an unselected population, represented by the entire scholastic population attending a Primary school and a Junior Secondary school in the rural town of San Marco in Lamis, 12.000 inhabitants (Puglia, Italy). ResultsAmong the 456 subjects included, 78 (17.1 %) had a positive skin prick test and 57 (12.5 %) had a positive atopy patch test. In particular, 13.4 % of subjects were positive only to skin prick test and 8.8 % were positive only to atopy patch test. The allergen most frequently positive was the house dust mite, with 41 positive results to skin prick test and 55 to atopy patch test, while for pollen positive results concerned almost exclusively the skin prick test. ConclusionsThis survey on an unselected population of children detected a prevalence of positive results to atopy patch test not so distant from the positive results to skin prick test, and in 8.8 % of subjects the atopy patch test was the only positive test. This would suggest to add the atopy patch test in future epidemiological studies on allergy, in order to avoid to overlook the not negligible portion of patients with T-cell-mediated allergy. 相似文献
15.
Purpose: The pathological process of atopic dermatitis (AD) progressing into other types of allergic diseases such as asthma and allergic rhinitis during the first several years of life is often referred to as the atopic march. Although the phenomenon of atopic march has been recognized for decades, how asthma stems from AD is still not fully understood, confounding a universal strategy to effectively protect people from the atopic march. Methods: We established experimental atopic march mice by first inducing allergic dermatitis with 0.5% fluorescein isothiocyante (FITC) applied to the skin, followed by an ovalbumin (OVA) airway challenge. In addition, by examining serum immunoglobulin (Ig) concentrations, airway cytokines, the levels of oxidative stress markers, histopathological changes in lung tissue and airway hyperresponsiveness (AHR), we were able to validate the successful establishment of the model. Furthermore, by detecting the attenuating effects of melatonin (MT) and the levels of oxidative stress in the atopic march mice, we explored the potential molecular mechanisms involved in the development of atopic march. Results: By successfully establishing an experimental atopic march mouse model, we were able to demonstrate that overproduction of oxidative stress in the lung significantly up-regulated the activation of nuclear factor-κB (NF-κB) signaling pathways causing thymic stromal lymphopoietin (TSLP) release, which further promotes the development of atopic march. Conclusions: To mitigate the development of the atopic march, antioxidants such as MT may be imperative to inhibit NF-κB activation in the lung, especially after the onset of AD. 相似文献
16.
目的通过观察皮肤酸碱度、皮脂分泌率、皮损部细菌密度、多样性和局部IL-1、IL-6水平,探讨清消法对寻常型痤疮患者面部微生态的影响。 方法选择我院收治的寻常型痤疮患者142例,按照随机数字表分成治疗组和对照组,各71例。对照组患者口服异维A酸联合外涂阿达帕林凝胶、夫西地酸乳膏;治疗组患者采用清消法联合外涂阿达帕林凝胶、夫西地酸乳膏进行治疗。观察两组患者的临床疗效、痤疮综合分级系统(GAGS)评分、面部皮肤酸碱度、皮脂分泌率、皮损部细菌密度和多样性及皮损局部IL-1、IL-6水平。 结果治疗组患者的总有效率(92.96%)高于对照组(81.69%)。与对照组比较,治疗组患者GAGS评分、皮肤酸碱度、皮脂分泌率、皮损部细菌密度及IL-1、IL-6水平均显著降低(均P<0.05)。 结论清消法可通过调节面部油脂分泌和酸碱度,改善患者皮损部菌群失衡,降低炎症因子,从而有效治疗痤疮。 相似文献
17.
AimsIn Sheng Nong’s herbal classic in China, Rhizoma coptidis a(RC) could be used to treat Atopic dermatits b(AD), but its core ingredient(s) and mechanism remains unknown. The present study aimed to find out the ingredients against AD and expound its mechanisms. Materials and methodsSeven alkaloids were isolated from RC to compare the inhibition against HaCaT cells by MTT assays and apoptosis of cells stimulated with TNF-α/IFN-γ by flow cytometry. The effects of target alkaloids against AD were evaluated on DNCB c (2,4-dinitrochlorobenzene)-induced atopic dermatitis in mice. Key findingsSeven alkaloids were isolated from RC successfully. The results from MTT and flow cytometry indicated that among these alkaloids, only magnoflorine d(MAG) had no obvious toxicity on cells, but could inhibit the apoptosis of the cells stimulated with TNF-α/IFN-γ. Further animal experiments confirmed that MAG significantly attenuated the AD-like symptom and inhibited the AD-induced increases in IgE/IL-4, as compared with control (P < 0.01). Moreover, MAG reduced the low Δψ m e(mitochondrial membrane potential) in HaCaT cells. The results of western blotting proved that MAG inhibited apoptosis of keratinocytes through decreasing the expressions of CTSB f (cathepsin B), Cyte Cg (cytochrome C), Bid and caspase-3/7/8/9. SignificanceOverall, MAG inhibited apoptosis by decreasing the expression of apoptotic pathway-related proteins, and laid a foundation for the study of AD mechanisms. 相似文献
18.
口腔是人体最重要的微生物储藏库之一,这些微生物通常以生物被膜的形式稳定地黏附于口腔内粘膜及牙齿表面,在病理条件下则可以深入髓腔及牙槽骨内,成为龋病、根尖周炎、牙周病等常见口腔疾病的主要病因,甚至与许多全身性疾病密切相关.在人类口腔微生态系统中,微生物种类繁多,生物被膜的构成及相互作用关系复杂,目前对其认识还十分有限;此... 相似文献
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