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Carbapenemase-producing Pseudomonas aeruginosa isolated from patients exhibited multidrug resistance in Sokoto, Nigeria 产碳青霉烯酶铜绿假单胞菌从尼日利亚索科托的患者中分离出多药耐药
Q2 Medicine Pub Date : 2025-06-07 DOI: 10.1016/j.medmic.2025.100134
Hassan Bawa , Kabiru Mohammed , Abdulrazak Nuhu , Abdulmalik Shuaibu , Farhan Rhidor Akorede , Olalekan Adesola , Muhammad Bashir Bello , Abdurrahman Hassan Jibril

Introduction

Carbapenemase-producing P. aeruginosa is one of the top priority pathogens responsible for treatment failures in cystic fibrosis, abscess and soft tissue infections. The study aimed to determine the prevalence of carbapenemase-producing P. aeruginosa in patients visiting two major public hospitals in Sokoto, Nigeria.

Methods

Two hundred and four samples were collected from in- and outpatients attending two major public hospitals in Sokoto, Nigeria. Identifying P. aeruginosa involved culturing on cetrimide agar and confirming by PCR detection of the oprI and oprL genes specific to P. aeruginosa. Isolates were screened for sensitivity to ten antibiotics using the Kirby-Bauer disc diffusion test. To identify carbapenemase production, isolates resistant to meropenem and imipenem were further screened using the combined disc synergy test. Molecular detection of carbapenemase was done using PCR detection of blaVIM, blaKPC and blaIMP genes.

Results

Out of the 204 samples collected, 26 (12.7 %) of P. aeruginosa were recovered. All 26 isolates demonstrated resistance to more than three classes of antibiotics tested. Notably, 19.2 % (5/26) of the isolates were pan-drug-resistant to all antibiotics tested. Besides, 65.4 % (14/26) of isolates were at least resistant to ampicillin, kanamycin, cefotaxime, trimethoprim and chloramphenicol. A combined disk synergy test showed six isolates to produce carbapenemase enzyme. Likewise, blaVIM and blaIMP were detected in all of these isolates, while blaKPC was not detected in any.

Conclusions

The presence of carbapenemase-producing P. aeruginosa (carrying blaVIM and blaIMP genes) among hospital patients in Sokoto and the high antibiotic resistance detected represent a challenging threat to public health. Further research is crucial to understanding this carbapenemase gene's transmission source and developing effective strategies to combat it.
产碳青霉烯酶的铜绿假单胞菌是导致囊性纤维化、脓肿和软组织感染治疗失败的首要病原体之一。该研究旨在确定在尼日利亚索科托两家主要公立医院就诊的患者中产生碳青霉烯酶的铜绿假单胞菌的患病率。方法采集尼日利亚索科托两所主要公立医院门诊和住院患者244例样本。铜绿假单胞菌的鉴定需要在氰胺琼脂上培养,并通过PCR检测铜绿假单胞菌特异性的oprI和oprL基因。采用Kirby-Bauer圆盘扩散试验筛选分离株对10种抗生素的敏感性。为了鉴定碳青霉烯酶的产生,采用联合圆盘协同试验进一步筛选对美罗培南和亚胺培南耐药的分离株。采用PCR检测blaVIM、blaKPC和blaIMP基因,对碳青霉烯酶进行分子检测。结果204份样品中,检出铜绿假单胞菌26份(12.7%)。所有26个分离株都显示出对三种以上抗生素的耐药性。值得注意的是,19.2%(5/26)的分离株对所有检测的抗生素均耐药。65.4%(14/26)的分离菌对氨苄西林、卡那霉素、头孢噻肟、甲氧苄啶和氯霉素至少耐药。联合圆盘协同试验表明,6株分离菌株均能产生碳青霉烯酶。同样,blaVIM和blaIMP在所有分离株中均检测到,而blaKPC未在任何分离株中检测到。结论索科托市医院患者中存在产碳青霉烯酶P. aeruginosa(携带blaVIM和blaIMP基因),并检出高耐药性,对公众健康构成重大威胁。进一步的研究对于了解碳青霉烯酶基因的传播来源和制定有效的对抗策略至关重要。
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引用次数: 0
The subtle threat of human papilloma virus: A comprehensive overview 人类乳头瘤病毒的微妙威胁:全面概述
Q2 Medicine Pub Date : 2025-06-03 DOI: 10.1016/j.medmic.2025.100135
Nisha Beniwal , Baljeet Singh Saharan
Oncogenic viruses that flourish in people as well as animals can produce malignances. With almost more than 200 different forms, human papillomavirus (HPV) is the main oncogenic virus present in the reproductive tract. The most common form is HPV 16; large amounts of this type have been found in warty and basaloid vulvar cancer. Particularly HPV strains 6, 11, and 18, which are linked to vaginal cancer, women who participate in sexual activity have a higher risk of obtaining HPV. Comprising five species and a 7.9 kilobase genome, HPV consists in 120 identified strains. Men have more HPV infections than women; 11.5 % of men and 3.2 % of women get infected with HPV. Men who engage in oral intercourse with two or more partners had the highest prevalence of oral HPV infection; high-risk oral HPV is linked with factors including cigarette and marijuana usage. Because of concurrent genital HPV infection, women had three times higher oral HPV infection rate. As HPV DNA can transform normal breast cells into a unique and self-sustaining phenotype, conision is a definitive sign of HPV infection. Linked to HPV, cancer is a major worldwide burden; several types of cancers in humans are brought on by HPV infection. Cryotherapy for cervical intra epithelial neoplasia (CIN), photodynamic therapy (PDT), prodrug 5-aminolevulinic acid (ALA)-mediated PDT, HPV inactivation by antiviral medicine and salicylic acid, and medications against cancer and monoclonal antibodies comprise treatment and preventive techniques. Among the FDA-approved treatments for several malignancies include Bleomycin sulfates, gemcitabine and cisplatin, topotecan hydrochloride, bevacizumab, pembrolizumab, platinum and fluorouracil, and durvalumab. This paper offers a thorough review of HPV-related cervical cancer addressing issues including pathogenesis, laboratory diagnosis, treatment, prevention, infection, epidemiology, global effect.
在人和动物体内繁殖的致瘤病毒可产生恶性肿瘤。人类乳头瘤病毒(HPV)几乎有200多种不同的形式,是生殖道中主要的致癌病毒。最常见的形式是HPV 16;在疣状和基底样外阴癌中发现了大量这种类型。尤其是与阴道癌有关的HPV 6、11和18株,参与性活动的女性感染HPV的风险更高。HPV包括5个物种和7.9千碱基的基因组,由120个已确定的菌株组成。男性感染HPV的比例高于女性;11.5%的男性和3.2%的女性感染HPV。与两个或两个以上的伴侣进行口交的男性口腔HPV感染的患病率最高;高危口腔HPV与吸烟和吸食大麻等因素有关。由于并发生殖器HPV感染,女性的口腔HPV感染率高出三倍。由于HPV DNA可以将正常乳腺细胞转化为独特且自我维持的表型,因此肿瘤是HPV感染的明确标志。癌症与人乳头瘤病毒有关,是世界范围内的一个主要负担;人类的几种癌症是由HPV感染引起的。宫颈上皮内瘤变(CIN)的冷冻治疗、光动力治疗(PDT)、前药5-氨基乙酰丙酸(ALA)介导的PDT、抗病毒药物和水杨酸灭活HPV、抗癌药物和单克隆抗体包括治疗和预防技术。fda批准的几种恶性肿瘤治疗包括博莱霉素硫酸盐、吉西他滨和顺铂、盐酸拓扑替康、贝伐单抗、派姆单抗、铂和氟尿嘧啶以及杜伐单抗。本文综述了hpv相关宫颈癌的发病机制、实验室诊断、治疗、预防、感染、流行病学、全球影响等方面的研究进展。
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引用次数: 0
Enhancing antimicrobial efficacy: Gum acacia-enriched Lactobacillus consortium against multidrug-resistant pathogens 增强抗菌功效:富含金合欢胶的乳酸杆菌联合体对抗多重耐药病原体
Q2 Medicine Pub Date : 2025-05-30 DOI: 10.1016/j.medmic.2025.100132
Jinal Bhola, Rama Bhadekar
The escalating challenge of antimicrobial resistance (AMR) has rendered many pathogens impervious to conventional antibiotics, necessitating novel therapeutic approaches. This study evaluates the antimicrobial potential of a Gum Acacia-enriched Active GRAS Consortium (AGC), composed of Lactobacillus plantarum, L. acidophilus, and L. casei var. rhamnosus, against multidrug-resistant (MDR) pathogens. AGC formulations, with (Set IV) and without (Set III) gum acacia, were tested against clinical isolates of Staphylococcus aureus, Acinetobacter baumannii, Klebsiella pneumoniae, and Escherichia coli. Set IV demonstrated significantly enhanced antimicrobial activity, with inhibition zones reaching 18.7 mm, minimum inhibitory concentrations (MIC) as low as 0.83 mg/ml, and strong biofilm inhibition. Mechanistic assays revealed amplified DNA release from treated pathogens and unique antimicrobial protein profiles (<6.5 kDa) stabilized by gum acacia. Scanning electron microscopy confirmed severe ultrastructural damage, including membrane disruption and lysis, in Set IV-treated pathogens. Adhesion assays on Caco-2 cells highlighted Set IV's ability to reduce pathogen adhesion to 5 %, outperforming non-GA enriched formulation. These results underscore the synergistic role of probiotics and natural polysaccharides, like gum acacia, in combating MDR pathogens. Set IV's dual action-direct pathogen inhibition and biofilm disruption-positions it as a promising candidate for alternative or adjunctive therapies in AMR management. This study highlights the potential of integrating probiotics and prebiotics to create innovative solutions addressing the global AMR crisis.
抗菌素耐药性(AMR)不断升级的挑战已经使许多病原体对传统抗生素不敏感,需要新的治疗方法。本研究评估了由植物乳杆菌、嗜酸乳杆菌和鼠李糖干酪乳杆菌组成的富含相思胶的活性GRAS联合体(AGC)对多药耐药(MDR)病原体的抗菌潜力。AGC制剂,含(组IV)和不含(组III)相思胶,对临床分离的金黄色葡萄球菌、鲍曼不动杆菌、肺炎克雷伯菌和大肠杆菌进行了检测。菌株IV的抑菌活性显著增强,抑菌区达18.7 mm,最低抑菌浓度(MIC)低至0.83 mg/ml,具有较强的生物膜抑制作用。机制分析显示,经处理的病原体释放的DNA扩增,以及由金合欢胶稳定的独特抗菌蛋白谱(<6.5 kDa)。扫描电子显微镜证实,在Set iv处理的病原体中存在严重的超微结构损伤,包括膜破坏和裂解。Caco-2细胞的粘附试验突出了Set IV将病原体粘附率降低至5%的能力,优于非ga富集制剂。这些结果强调了益生菌和天然多糖(如阿拉伯胶)在对抗耐多药病原体中的协同作用。Set IV的双重作用-直接抑制病原体和破坏生物膜-使其成为AMR管理中替代或辅助治疗的有希望的候选药物。这项研究强调了整合益生菌和益生元的潜力,以创造解决全球抗生素耐药性危机的创新解决方案。
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引用次数: 0
Molecular insights into the impact of environmental pollution on gut microbiota and short chain fatty acids (SCFA) mediated metabolic dysregulation 环境污染对肠道微生物群和短链脂肪酸(SCFA)介导的代谢失调影响的分子见解
Q2 Medicine Pub Date : 2025-05-29 DOI: 10.1016/j.medmic.2025.100133
S.P. Ramya Ranjan Nayak , Anamika Das , Ki Choon Choi , M. Valan Arasu , S. Karthick Raja Namasivayam , Ajay Guru , Jesu Arockiaraj
There is an undeniable link between environmental pollution and various metabolic disorders, as well as increased mortality rates. This phenomenon has become a significant concern in the health field over the past few decades. Multiple scientific studies have provided evidence that environmental pollutants can directly disturb the equilibrium of gut microbiota. It is well-known that an imbalance in gut microbes leads to alterations in their metabolic byproducts. A notable byproduct is short-chain fatty acids (SCFA), mainly generated through the fermentation of indigestible carbohydrates by gut bacteria. There is a growing body of evidence indicating that SCFAs have a significant impact on overall health and the development of various diseases. Recent advancements in SCFA research have highlighted their considerable effects on various physiological systems operating at the cellular and molecular levels. Considering the role of SCFAs in regulating G protein-coupled receptors (GPCR) and histone deacetylase (HADC), it becomes evident that their upregulation or downregulation can significantly impact the development of various diseases. This review explores the impact of various environmental pollutants on SCFA levels. Furthermore, it delves into the possible implications of SCFAs on developing different diseases and the intricate molecular mechanisms involved.
环境污染与各种代谢紊乱以及死亡率上升之间有着不可否认的联系。这一现象在过去几十年中已成为卫生领域的一个重大问题。多项科学研究证明,环境污染物会直接扰乱肠道菌群的平衡。众所周知,肠道微生物的不平衡会导致其代谢副产物的改变。一个值得注意的副产物是短链脂肪酸(SCFA),主要是由肠道细菌发酵不消化的碳水化合物产生的。越来越多的证据表明,短链脂肪酸对整体健康和各种疾病的发展有重大影响。近年来SCFA研究的进展突出了它们在细胞和分子水平上对各种生理系统的重要作用。考虑到SCFAs在G蛋白偶联受体(GPCR)和组蛋白去乙酰化酶(HADC)调控中的作用,其上调或下调明显影响多种疾病的发生发展。本文综述了各种环境污染物对SCFA水平的影响。此外,它还深入探讨了SCFAs在不同疾病发生中的可能影响及其复杂的分子机制。
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引用次数: 0
Gut brain axis and gut microbiome in glioblastoma. Associations, treatment and outcomes 胶质母细胞瘤的肠脑轴和肠道微生物组。关联、治疗和结果
Q2 Medicine Pub Date : 2025-05-23 DOI: 10.1016/j.medmic.2025.100131
Nandita Ganesh , Azeena Saleem , Roja Babu , Praveenkumar Kochuthakidiyel Suresh
Most of the fundamental functions of the body hinge on the gut-brain axis which is a complex communication system connecting gut and brain. Recent studies show that the gut microbiome plays a significant role in the growth and progression of glioblastoma (GBM), influenced through this gut-brain connection. This review focuses on the recent development in gut brain axis and gut microbiome in GBM, including their roles in the immune system, and the results of treatment. We conducted a broad review to explore how the gut microbiota affects neurotransmitters, the immune system, and the blood-brain barrier (BBB) in GBM by analysing the recent studies published in PubMed, Google Scholar, Scopus, and Elsevier. Findings suggest that the gut microbiota population affects the GBM progression and sustenance. Also, it is observed that there is significant influence of gut microbiota in novel treatment strategies of GBM such as immunotherapy. The gut-brain axis plays an important role GBM progression. Changing the gut microbiota could be a useful treatment strategy. Future studies are required to further explore in which specific microbes are involved in order to identify microbiota-based markers to improve GBM treatments.
身体的大部分基本功能都依赖于肠脑轴,这是一个连接肠和脑的复杂通信系统。最近的研究表明,肠道微生物组在胶质母细胞瘤(GBM)的生长和进展中起着重要作用,通过这种肠脑连接受到影响。本文综述了近年来肠脑轴和肠道微生物在GBM中的研究进展,包括它们在免疫系统中的作用以及治疗结果。我们通过分析最近发表在PubMed、谷歌Scholar、Scopus和Elsevier上的研究,对肠道微生物群如何影响GBM的神经递质、免疫系统和血脑屏障(BBB)进行了广泛的回顾。研究结果表明,肠道微生物群影响GBM的进展和维持。此外,肠道菌群在免疫治疗等新的GBM治疗策略中也有显著的影响。肠脑轴在GBM的进展中起重要作用。改变肠道菌群可能是一种有用的治疗策略。未来的研究需要进一步探索特定微生物的参与,以确定基于微生物群的标记物来改善GBM的治疗。
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引用次数: 0
Corrigendum to “The effect of oral bacterial lysates on the respiratory microbiome in patients with chronic obstructive pulmonary disease exacerbations – A pilot study” [Med Microecol, Volume 14, December 2022, 100067] “口腔细菌溶解物对慢性阻塞性肺疾病加重患者呼吸道微生物组的影响——一项试点研究”的勘误表[Med Microecol, vol . 14, December 2022, 100067]
Q2 Medicine Pub Date : 2025-05-22 DOI: 10.1016/j.medmic.2025.100130
Yafei Qi , Zhou Zhu , Xiaomin Liu , Junhao Yang , Weimin Zhang , Jinlun Huang , Hong Li , Weijie Guan , Zhang Wang , Yinhuan Li
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引用次数: 0
Exploring the therapeutic promise of Trichodesma indicum: A phytochemical, antioxidant, and in silico insights into anti-arthritis properties 探索indicum木霉的治疗前景:一种植物化学物质,抗氧化剂和抗关节炎特性的计算机洞察
Q2 Medicine Pub Date : 2025-05-15 DOI: 10.1016/j.medmic.2025.100129
Thavasiaanatham Seenivasan Shalini , Ragothaman Prathiviraj , Poomalai Senthilraja
The present study provides a comprehensive phytochemical and pharmacological evaluation of Trichodesma indicum methanolic leaf extract, highlighting its potential as a source of bioactive compounds with significant antimicrobial, antioxidant, and anti-arthritic properties. The extract's total phenolic content was quantified as 2.28 μg gallic acid equivalents (GAE) per gram of dry weight. In contrast, total flavonoid content was measured at 2.48 μg quercetin equivalents (QE) per gram. The extract exhibited potent antioxidant activity through DPPH, ABTS, and FRAP assays. DPPH radical scavenging assay revealed concentration-dependent antioxidant activity for the methanolic extract (25–150 μg/mL), with inhibition percentages ranging from 10.69 ± 0.7 % to 45.65 ± 0.7 %. Ascorbic acid, used as a standard, exhibited comparable inhibition (17.16 ± 0.6 % to 49.18 ± 0.6 %). ABTS radical scavenging assays further confirmed the extract's antioxidant potential, showing 36.79 ± 0.6 % inhibition at 100 μg/mL, marginally exceeding ascorbic acid (35.82 ± 0.5 %). Ferric reducing antioxidant power (FRAP) assays indicated dose-dependent activity, with the extract reducing Fe3+ at 39.80 ± 0.4 % (25 μg/mL) to 54.55 ± 0.5 % (100 μg/mL), closely mirroring ascorbic acid (52.93 ± 0.5 % to 61.91 ± 0.6 %) along with antibacterial effects against five pathogens, with inhibition zones ranging from 13 to 26 mm. Functional group analysis via FT-IR confirmed the presence of diverse bioactive constituents, while HR-LCMS identified 72 phytocompounds (35 in positive ionization; 37 in negative ionization) which 52 passed ADMET screening, most exhibited good solubility (−2.336 to −4.539 log units) and blood-brain barrier penetration indicating their potential pharmacokinetic suitability. Molecular docking studies further validated the therapeutic potential of these compounds, with Grossamide (PubChem ID: 101262727) demonstrating the highest binding affinity against both antibacterial (LibDock score: 173.57 shown as E. coli; GyrB) and anti-arthritic, Sphinganine (PubChem ID: 91486) exhibiting multi-interaction binding modes of (LibDock score: 169.42; 6COX) and Grossamide (LibDock score: 201.94; 8K5V) as lead candidates, Thus, T. indicum promising bioactive molecules that could serve as effective candidates for antimicrobial and anti-arthritic drug development.
本研究提供了一个全面的植物化学和药理学评价木霉的甲醇叶提取物,强调其潜在的生物活性化合物的来源具有显著的抗菌,抗氧化和抗关节炎的特性。测定其总酚含量为每克干重2.28 μg没食子酸当量(GAE)。总黄酮含量为每克2.48 μg槲皮素当量(QE)。通过DPPH、ABTS和FRAP检测,该提取物显示出强大的抗氧化活性。甲醇提取物对DPPH自由基的清除作用呈浓度依赖性(25 ~ 150 μg/mL),抑制率在10.69±0.7% ~ 45.65±0.7%之间。抗坏血酸作为标准,表现出相当的抑制作用(17.16±0.6%至49.18±0.6%)。ABTS自由基清除实验进一步证实了提取物的抗氧化潜力,在100 μg/mL时,其抑制作用为36.79±0.6%,略高于抗坏血酸(35.82±0.5%)。铁还原抗氧化能力(FRAP)显示出剂量依赖性,提取物将Fe3+的还原率为39.80±0.4% (25 μg/mL)至54.55±0.5% (100 μg/mL),与抗坏血酸(52.93±0.5%至61.91±0.6%)密切相关,并对5种病原体具有抗菌作用,抑制范围为13 ~ 26 mm。通过FT-IR功能基分析证实了多种生物活性成分的存在,而HR-LCMS鉴定出72种植物化合物(35种正离子化;其中52个通过了ADMET筛选,大多数具有良好的溶解度(- 2.336至- 4.539 log单位)和血脑屏障穿透性,表明其潜在的药代动力学适用性。分子对接研究进一步验证了这些化合物的治疗潜力,Grossamide (PubChem ID: 101262727)对这两种抗菌药物表现出最高的结合亲和力(LibDock评分:173.57,显示为大肠杆菌;GyrB)和抗关节炎的鞘氨酸(PubChem ID: 91486)表现出多相互作用的结合模式(LibDock评分:169.42;6COX)和Grossamide (LibDock评分:201.94;因此,芽孢杆菌具有良好的生物活性分子,可作为抗菌和抗关节炎药物开发的有效候选物。
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引用次数: 0
The gut-skin axis in psoriasis: Evidence-based insights from a meta-analysis on probiotics-synbiotics-mediated microbiota interventions 牛皮癣的肠道-皮肤轴:来自益生菌-合成菌介导的微生物群干预的荟萃分析的循证见解
Q2 Medicine Pub Date : 2025-05-05 DOI: 10.1016/j.medmic.2025.100126
Nurlinah Amalia , Danar Wicaksono , Elvan Wiyarta , Derren David Christian Homenta Rampengan , Hari Darmawan , Muhammad Reva Aditya , Ariq Fadhil Athallah , Maulana Bagus Adi Cahyono , Aiman Idrus Alatas , Trina Ekawati Tallei , Raymond Rubianto Tjandrawinata , Arun K. Bhunia , Fahrul Nurkolis
Psoriasis, a chronic immune-mediated skin condition, has been intricately linked to gut microbiota dysbiosis through the gut-skin axis. This meta-analysis synthesizes data from 15 randomized controlled trials encompassing 1,423 participants to evaluate the efficacy of gut microbiota interventions—probiotics and synbiotics—in psoriasis management. The findings reveal that probiotics significantly improved the Psoriasis Area and Severity Index (PASI) (Mean Difference [MD]: −4.05, 95 % CI: −6.73 to −1.38; p < 0.0001) and Dermatology Life Quality Index (DLQI) (MD: −5.74, 95 % CI: −11.45 to −0.03; p = 0.0001), outperforming synbiotics and systemic pharmacological therapies such as anti-TNF-α and anti-interleukin agents. Notably, probiotics demonstrated superior systemic anti-inflammatory (TNF-α and IL-17) and immunomodulatory responses, and enhanced gut barrier integrity. This study highlights probiotics as a promising adjunct or alternative therapy, paving the way for integrative treatment strategies that address psoriasis's multifaceted pathophysiology. Future research should focus on long-term efficacy and molecular mechanisms to optimize outcomes. These findings could redefine therapeutic paradigms, offering a cost-effective and accessible solution for millions of psoriasis patients worldwide.
牛皮癣是一种慢性免疫介导的皮肤疾病,通过肠道-皮肤轴与肠道微生物群失调有着复杂的联系。本荟萃分析综合了15项随机对照试验的数据,包括1423名参与者,以评估肠道微生物群干预-益生菌和合成制剂-在牛皮癣治疗中的疗效。结果显示,益生菌显著改善银屑病面积和严重程度指数(PASI) (Mean Difference [MD]:−4.05,95% CI:−6.73 ~−1.38;p & lt;0.0001)和皮肤病生活质量指数(DLQI) (MD:−5.74,95% CI:−11.45 ~−0.03;p = 0.0001),优于合成药物和全身药物治疗,如抗tnf -α和抗白细胞介素药物。值得注意的是,益生菌表现出优越的全身抗炎(TNF-α和IL-17)和免疫调节反应,并增强肠道屏障的完整性。本研究强调益生菌作为一种有前景的辅助或替代疗法,为解决牛皮癣多方面病理生理的综合治疗策略铺平了道路。未来的研究应侧重于长期疗效和分子机制,以优化结果。这些发现可以重新定义治疗范例,为全球数百万牛皮癣患者提供具有成本效益和可获得的解决方案。
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引用次数: 0
The past, present, future of Listeria monocytogenes: Understanding the molecular pathways, antibiotic resistance and public health implications 单核增生李斯特菌的过去、现在和未来:了解分子途径、抗生素耐药性和公共卫生影响
Q2 Medicine Pub Date : 2025-05-02 DOI: 10.1016/j.medmic.2025.100127
Arpita Anupama, Veilumuthu Pattapulavar, John Godwin Christopher
Antibiotic resistance is a grave, potential threat to global health due to the continuing difficulty in treating bacterial infections. Misuse and overuse of antibiotics in humans and animals increase this resistance by creating "superbugs" impervious to multiple drug therapies. One pathogen that is acquiring resistance is Listeria monocytogenes, a gram-positive bacterium responsible for listeriosis, mainly in immunocompromised individuals. This pathogen's potential for biofilm formation in food processing environments enhances the threat even more, since such biofilms protect the bacteria from standard cleaning procedures and enhance its resistance to antibiotics. Listeria monocytogenes has several mechanisms of resistance against antibiotics by genetic alternations, efflux pumps, and biofilm formation, which exclude the antibiotic, and enzymatic degradation. These mechanisms make the bacteria successful in surviving a hostile environment and resisting several classes of antibiotics; hence, listeriosis is increasingly difficult to treat. It is, therefore, very important to understand the molecular dynamics of Listeria monocytogenes and its strategies of resistance if the design of new therapeutic approaches is to be successful and public health measures are to be effective in controlling the spread of the pathogen. Precisely, this paper attempts a detailed review of the mechanisms of Listeria monocytogenes pathogenesis and antibiotic resistance, together with public health implications that call for urgent innovative strategies in the war against this resilient pathogen.
由于治疗细菌感染仍然困难重重,抗生素耐药性对全球健康构成严重的潜在威胁。在人类和动物中滥用和过度使用抗生素会产生对多种药物治疗不敏感的“超级细菌”,从而增加这种耐药性。一种获得耐药性的病原体是单核细胞增生李斯特菌,这是一种革兰氏阳性细菌,主要在免疫功能低下的个体中引起李斯特菌病。这种病原体在食品加工环境中形成生物膜的潜力进一步增加了威胁,因为这种生物膜可以保护细菌免受标准清洁程序的影响,并增强其对抗生素的耐药性。单核增生李斯特菌对抗生素的耐药机制有多种,包括基因改变、外排泵和生物膜形成(排除抗生素)以及酶降解。这些机制使细菌成功地在恶劣的环境中生存并抵抗几种抗生素;因此,李斯特菌病越来越难以治疗。因此,了解单核增生李斯特菌的分子动力学及其耐药策略对于设计新的治疗方法和有效的公共卫生措施来控制病原体的传播是非常重要的。准确地说,本文试图详细回顾单核细胞增生李斯特菌的发病机制和抗生素耐药性,以及公共卫生影响,呼吁在对抗这种有弹性的病原体的战争中采取紧急创新策略。
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引用次数: 0
Fecal microbiota transplantation for Parkinson's disease: A systematic review of clinical evidence 粪便微生物群移植治疗帕金森病:临床证据的系统回顾
Q2 Medicine Pub Date : 2025-05-02 DOI: 10.1016/j.medmic.2025.100128
Subhiksha Shekar, Ramesh Venkatachalapathy, Akash Jayaraman, N. Sai Supra Siddhu
Targeting the gut-brain axis, fecal microbiota transplantation (FMT) has become a cutting-edge therapeutic strategy for treating Parkinson's disease (PD), reducing both motor and non-motor symptoms. With an emphasis on gut microbiota changes, disease progression, and symptom alleviation, this systematic review assesses the safety and effectiveness of FMT in PD patients. Four RCTs, one observational research, one non-randomized control study, one case series, and one case report were among the eight papers that were considered; these studies comprised 144 patients in total. Key findings show that FMT has a good safety profile with only mild to severe adverse effects observed, and it significantly improves PD symptoms, notably constipation. Colonic, Nasointestinal, and oral administration were among the delivery routes used to assess treatment effectiveness using the MDS-UPDRS scale. The research reveals differences in the makeup of microbiota and emphasizes how FMT may affect the gut-brain axis, hence resolving neurological abnormalities in Parkinson's disease. Small sample numbers, variations in FMT methods, and the absence of long-term follow-up data are some of the limitations. This study highlights FMT's potential as an adjunctive treatment for Parkinson's disease (PD), especially in improving patient quality of life and reducing non-motor symptoms. To provide standardized procedures and validate long-term safety and effectiveness, bigger multicentre trials are necessary.
针对肠-脑轴,粪便微生物群移植(FMT)已成为治疗帕金森病(PD)的前沿治疗策略,可减轻运动和非运动症状。本系统综述以肠道菌群变化、疾病进展和症状缓解为重点,评估了FMT治疗PD患者的安全性和有效性。纳入的8篇论文包括4项随机对照试验、1项观察性研究、1项非随机对照研究、1个病例系列和1个病例报告;这些研究共纳入144例患者。主要研究结果表明,FMT具有良好的安全性,仅观察到轻微至严重的不良反应,并可显着改善PD症状,特别是便秘。结肠、鼻肠和口服给药是使用MDS-UPDRS量表评估治疗效果的给药途径。该研究揭示了微生物群组成的差异,并强调了FMT如何影响肠-脑轴,从而解决帕金森病的神经异常。样本数量少,FMT方法的变化,以及缺乏长期随访数据是一些局限性。这项研究强调了FMT作为帕金森病(PD)辅助治疗的潜力,特别是在改善患者生活质量和减少非运动症状方面。为了提供标准化的程序并验证长期的安全性和有效性,有必要进行更大规模的多中心试验。
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Medicine in Microecology
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