Pathogens and disease最新文献_第4页

Macrophage pyroptosis induced by Candida albicans. 白色念珠菌诱导的巨噬细胞裂解症

IF 2.7 4区医学

Pathogens and disease Pub Date : 2024-02-07 DOI: 10.1093/femspd/ftae003

Feng-Yuan Zhang, Ni Lian, Min Li

引用次数: 0

In vitro effects of selective serotonin reuptake inhibitors on Cryptococcus gattii capsule and biofilm. 选择性 5-羟色胺再摄取抑制剂对隐球菌胶囊和生物膜的体外影响

IF 2.7 4区医学

Pathogens and disease Pub Date : 2024-02-07 DOI: 10.1093/femspd/ftae001

Letícia Rampazzo da Gama Viveiro, Amanda Rodrigues Rehem, Evelyn Luzia De Souza Santos, Paulo Henrique Fonseca do Carmo, Juliana Campos Junqueira, Liliana Scorzoni

{"title":"In vitro effects of selective serotonin reuptake inhibitors on Cryptococcus gattii capsule and biofilm.","authors":"Letícia Rampazzo da Gama Viveiro, Amanda Rodrigues Rehem, Evelyn Luzia De Souza Santos, Paulo Henrique Fonseca do Carmo, Juliana Campos Junqueira, Liliana Scorzoni","doi":"10.1093/femspd/ftae001","DOIUrl":"10.1093/femspd/ftae001","url":null,"abstract":"Infections caused by Cryptococcus gattii mainly affect immunocompetent individuals and the treatment presents important limitations. This study aimed to validate the efficacy of selective serotonin reuptake inhibitors (SSRI), fluoxetine hydrochloride (FLH), and paroxetine hydrochloride (PAH) in vitro against C. gattii. The antifungal activity of SSRI using the microdilution method revealed a minimal inhibitory concentration (MIC) of 31.25 µg/ml. The combination of FLH or PAH with amphotericin B (AmB) was analyzed using the checkerboard assay and the synergistic effect of SSRI in combination with AmB was able to reduce the SSRI or AmB MIC values 4-8-fold. When examining the effect of SSRI on the induced capsules, we observed that FLH and PAH significantly decreased the size of C. gattii capsules. In addition, the effects of FLH and PAH were evaluated in biofilm biomass and viability. The SSRI were able to reduce biofilm biomass and biofilm viability. In conclusion, our results indicate the use of FLH and PAH exhibited in vitro anticryptococcal activity, representing a possible future alternative for the cryptococcosis treatment.","PeriodicalId":19795,"journal":{"name":"Pathogens and disease","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10849314/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139417687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interplay between gut microbiota and the master iron regulator, hepcidin, in the pathogenesis of liver fibrosis. 肝纤维化发病机制中肠道微生物群与铁调节剂血钙素之间的相互作用。

IF 2.7 4区医学

Pathogens and disease Pub Date : 2024-02-07 DOI: 10.1093/femspd/ftae005

Sara Ahmadi Badi, Ahmad Bereimipour, Pejman Rohani, Shohreh Khatami, Seyed Davar Siadat

{"title":"Interplay between gut microbiota and the master iron regulator, hepcidin, in the pathogenesis of liver fibrosis.","authors":"Sara Ahmadi Badi, Ahmad Bereimipour, Pejman Rohani, Shohreh Khatami, Seyed Davar Siadat","doi":"10.1093/femspd/ftae005","DOIUrl":"10.1093/femspd/ftae005","url":null,"abstract":"Introduction: There is a proven role for hepcidin and the composition of gut microbiota and its derivatives in the pathophysiology of liver fibrosis.Area covered: This review focuses on the literature search regarding the effect of hepcidin and gut microbiota on regulating liver physiology. We presented the regulating mechanisms of hepcidin expression and discussed the possible interaction between gut microbiota and hepcidin regulation. Furthermore, we investigated the importance of the hepcidin gene in biological processes and bacterial interactions using bioinformatics analysis.Expert opinion: One of the main features of liver fibrosis is iron accumulation in hepatic cells, including hepatocytes. This accumulation can induce an oxidative stress response, inflammation, and activation of hepatic stellate cells. Hepcidin is a crucial regulator of iron by targeting ferroportin expressed on hepatocytes, macrophages, and enterocytes. Various stimuli, such as iron load and inflammatory signals, control hepcidin regulation. Furthermore, a bidirectional relationship exists between iron and the composition and metabolic activity of gut microbiota. We explored the potential of gut microbiota to influence hepcidin expression and potentially manage liver fibrosis, as the regulation of iron metabolism plays a crucial role in this context.","PeriodicalId":19795,"journal":{"name":"Pathogens and disease","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10990161/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140330054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The potential role of Protein disulfide isomerases (PDIs) during parasitic infections: A focus on Leishmania spp. 蛋白二硫异构酶（PDIs）在寄生虫感染中的潜在作用：聚焦利什曼原虫（Leishmania spp.

IF 3.3 4区医学

Pathogens and disease Pub Date : 2023-12-05 DOI: 10.1093/femspd/ftad032

Majid Dousti, Masoumeh Hosseinpour, Nadia DarestaniGhasemi, Hosna Mirfakhraee, Shahin Keshtkar Rajabi, Sajad Rashidi, Gholamreza Hatam

{"title":"The potential role of Protein disulfide isomerases (PDIs) during parasitic infections: A focus on Leishmania spp.","authors":"Majid Dousti, Masoumeh Hosseinpour, Nadia DarestaniGhasemi, Hosna Mirfakhraee, Shahin Keshtkar Rajabi, Sajad Rashidi, Gholamreza Hatam","doi":"10.1093/femspd/ftad032","DOIUrl":"https://doi.org/10.1093/femspd/ftad032","url":null,"abstract":"Leishmaniasis is a group of vector-borne diseases caused by intracellular protozoan parasites belonging to the genus Leishmania. Leishmania parasites can employ different and numerous sophisticated strategies including modulating host proteins, cell signaling, and cell responses by parasite proteins to change the infected host conditions to favor the parasite persistence and induce pathogenesis. In this sense, Protein Disulfide Isomerases (PDIs) have been described as crucial proteins that can be modulated during leishmaniasis and affect the pathogenesis process. The effect of modulated PDIs can be investigated in both aspects, parasite-PDIs, and infected host cells-PDIs, during infection. The information concerning PDIs is not sufficient in parasitology; however, this study aimed to provide data regarding the biological functions of such crucial proteins in parasites with a focus on Leishmania spp. and their relevant effects on the pathogenesis process. Although there are no clinical trial vaccines and therapeutic approaches, highlighting this information might be fruitful for the development of novel strategies based on PDIs for the management of parasitic diseases, especially leishmaniasis.","PeriodicalId":19795,"journal":{"name":"Pathogens and disease","volume":"8 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138554800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Leishmania LPG interacts with LRR5/LRR6 of macrophage TLR4 for parasite invasion and impairs the macrophage functions. 利什曼原虫LPG与巨噬细胞TLR4的LRR5/LRR6相互作用以进行寄生虫入侵并损害巨噬细胞功能。

IF 3.3 4区医学

Pathogens and disease Pub Date : 2023-01-17 DOI: 10.1093/femspd/ftad019

Sayani Mazumder, Archana Sinha, Sanhita Ghosh, Gurumayum Chourajit Sharma, Biswa Mohan Prusty, Debasis Manna, Durba Pal, Chiranjib Pal, Suman Dasgupta

{"title":"Leishmania LPG interacts with LRR5/LRR6 of macrophage TLR4 for parasite invasion and impairs the macrophage functions.","authors":"Sayani Mazumder, Archana Sinha, Sanhita Ghosh, Gurumayum Chourajit Sharma, Biswa Mohan Prusty, Debasis Manna, Durba Pal, Chiranjib Pal, Suman Dasgupta","doi":"10.1093/femspd/ftad019","DOIUrl":"10.1093/femspd/ftad019","url":null,"abstract":"Visceral leishmaniasis (VL) is a severe form of leishmaniasis, primarily affecting the poor in developing countries. Although several studies have highlighted the importance of toll-like receptors (TLRs) in the pathophysiology of leishmaniasis, the role of specific TLRs and their binding partners involved in Leishmania donovani uptake are still elusive. To investigate the mechanism of L. donovani entry inside the macrophages, we found that the parasite lipophosphoglycan (LPG) interacted with the macrophage TLR4, leading to parasite uptake without any significant alteration of macrophage cell viability. Increased parasite numbers within macrophages markedly inhibited lipopolysachharide-induced pro-inflammatory cytokines gene expression. Silencing of macrophage-TLR4, or inhibition of parasite-LPG, significantly stemmed parasite infection in macrophages. Interestingly, we observed a significant enhancement of macrophage migration, and generation of reactive oxygen species (ROS) in the parasite-infected TLR4-silenced macrophages, whereas parasite infection in TLR4-overexpressed macrophages exhibited a notable reduction of macrophage migration and ROS generation. Moreover, mutations in the leucine-rich repeats (LRRs), particularly LRR5 and LRR6, significantly prevented TLR4 interaction with LPG, thus inhibiting cellular parasite entry. All these results suggest that parasite LPG recognition by the LRR5 and LRR6 of macrophage-TLR4 facilitated parasite entry, and impaired macrophage functions. Therefore, targeting LRR5/LRR6 interactions with LPG could provide a novel option to prevent VL.","PeriodicalId":19795,"journal":{"name":"Pathogens and disease","volume":" ","pages":""},"PeriodicalIF":3.3,"publicationDate":"2023-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10413977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High prevalence of GR2 and GR4 plasmids in Acinetobacter baumannii strains from Brazil. GR2和GR4质粒在巴西鲍曼不动杆菌菌株中的高患病率。

IF 3.3 4区医学

Pathogens and disease Pub Date : 2023-01-17 DOI: 10.1093/femspd/ftad022

Beatriz Souza Toscano de Melo, Danilo Elias Xavier, Nilma Cintra Leal, Túlio de Lima Campos

{"title":"High prevalence of GR2 and GR4 plasmids in Acinetobacter baumannii strains from Brazil.","authors":"Beatriz Souza Toscano de Melo, Danilo Elias Xavier, Nilma Cintra Leal, Túlio de Lima Campos","doi":"10.1093/femspd/ftad022","DOIUrl":"10.1093/femspd/ftad022","url":null,"abstract":"Acinetobacter baumannii is Gram-negative pathogen with extensive role in healthcare-associated infections (HAIs). Plasmids in this species are important carriers of antimicrobial resistance genes. In this work, we investigated the plasmids of 227 Brazilian A. baumannii genomes. A total of 389 plasmid sequences with 424 Rep proteins typed to 22 different homology groups (GRs) were identified. The GR2 plasmid group was the most predominant (40.6%), followed by the GR4 group (16.7%), representing ∼57% of all plasmids. There is a wide distribution of plasmids among the isolates and most strains carry more than one plasmid. Our analyses revealed a significant prevalence of GR4 plasmids in Brazilian A. baumannii genomes carrying several antimicrobial resistance genes, notably to carbapenem (39.43%). These plasmids harbor a MOBQ relaxase that might confer increased spreading potential in the environment. Most plasmids of the predominant groups belong to the same plasmid taxonomic unit (PTU-Pse7) and have a AbkA/AbkB toxin-antitoxin system that has a role in plasmid stability and dissemination of carbapenem resistance genes. The results of this work should contribute to our understanding of the molecular content of plasmids in a large and populous country, highlighting the importance of genomics for enhanced epidemiological surveillance.","PeriodicalId":19795,"journal":{"name":"Pathogens and disease","volume":" ","pages":""},"PeriodicalIF":3.3,"publicationDate":"2023-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10143543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Immunotherapies for the prevention and treatment of Staphylococcus aureus infections: updates and challenges. 预防和治疗金黄色葡萄球菌感染的免疫疗法:最新进展和挑战。

IF 3.3 4区医学

Pathogens and disease Pub Date : 2023-01-17 DOI: 10.1093/femspd/ftad016

Pooi Yin Chung

引用次数: 1

ERK inhibition aids IFN-β promoter activation during EV71 infection by blocking CRYAB degradation in SH-SY5Y cells. 通过阻断SH-SY5Y细胞中CRYAB的降解，ERK抑制有助于EV71感染期间IFN-β启动子的激活。

IF 3.3 4区医学

Pathogens and disease Pub Date : 2023-01-17 DOI: 10.1093/femspd/ftad011

Dengming Chen, Cheng Chen, Jingyu Tan, Jing Yang, Bangtao Chen

{"title":"ERK inhibition aids IFN-β promoter activation during EV71 infection by blocking CRYAB degradation in SH-SY5Y cells.","authors":"Dengming Chen, Cheng Chen, Jingyu Tan, Jing Yang, Bangtao Chen","doi":"10.1093/femspd/ftad011","DOIUrl":"https://doi.org/10.1093/femspd/ftad011","url":null,"abstract":"Enterovirus 71 (EV71) can cause severe hand-foot-and-mouth disease with neurological complications. It has evolved multiple mechanisms to compromise the host type I interferon (IFN-I) response. In neuronal cells, EV71-mediated IFN-I antagonism may be associated with neural precursor cell-expressed developmentally downregulated 4-like (Nedd4L), the E3 ubiquitin ligase that can interact with alphaB-crystallin (CRYAB) in the regulation of Nav1.5 stability. Here, we investigated the effect of CRYAB stability on IFN-β promoter activity in neuronal SH-SY5Y cells infected with EV71, and its relations to Nedd4 L and extracellular signal-regulated kinases (ERK). Results showed that EV71 infection significantly caused CRYAB degradation via the Nedd4L-proteasome pathway, which required ERK-mediated phosphorylation of Serine 45 in CRYAB. Subsequently, it was observed that siRNA- or EV71-mediated CRYAB reduction limited Poly(dAT)-activated IFN-β promoter, and CRYAB stabilisation by U0126-mediated inhibition of ERK activation remarkably enhanced the activity of IFN-β promoter upon EV71 challenge. Collectively, we elucidate a novel mechanism by which ERK activation contributes to EV71 immune escape via CRYAB/IFN-β axis in SH-SY5Y cells, indicating that perturbing ERK activation is desirable for anti-EV71 therapy.","PeriodicalId":19795,"journal":{"name":"Pathogens and disease","volume":"81 ","pages":""},"PeriodicalIF":3.3,"publicationDate":"2023-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9794810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In vitro and in vivo evaluation of DNase I in reinstating antibiotic efficacy against Klebsiella pneumoniae biofilms. 体外和体内评价dna酶I对肺炎克雷伯菌生物膜恢复抗生素疗效的作用。

IF 3.3 4区医学

Pathogens and disease Pub Date : 2023-01-17 DOI: 10.1093/femspd/ftad001

Anayata Sharma, Praveen Rishi, Rachna Singh

{"title":"In vitro and in vivo evaluation of DNase I in reinstating antibiotic efficacy against Klebsiella pneumoniae biofilms.","authors":"Anayata Sharma, Praveen Rishi, Rachna Singh","doi":"10.1093/femspd/ftad001","DOIUrl":"https://doi.org/10.1093/femspd/ftad001","url":null,"abstract":"Klebsiella pneumoniae is an opportunistic pathogen associated with biofilm-based infections, which are intrinsically antibiotic resistant. Extracellular DNA plays a crucial role in biofilm formation and self-defence, with nucleases being proposed as promising agents for biofilm disruption. This study evaluated the in vitro and in vivo efficacy of DNase I in improving the activity of cefotaxime, amikacin, and ciprofloxacin against K. pneumoniae biofilms. K. pneumoniae ATCC 700603 and a clinical isolate from catheter-related bloodstream infection were cultured for biofilm formation on microtiter plates, and the antibiofilm activity of the antibiotics (0.03-64 mg/L), with or without bovine pancreatic DNase I (1-32 mg/L) was determined by XTT dye reduction test and viable counting. The effect of ciprofloxacin (2 mg/L) and DNase I (16 mg/L) was further evaluated in vitro on 1-cm-long silicon catheter segments, and in a mouse model of subcutaneous catheter-associated infection. Combination with DNase I did not improve the biofilm-preventive capacity of the three antibiotics or the biofilm-eradicating capacity of cefotaxime and amikacin. The biofilm-eradicating capacity of ciprofloxacin was increased by 8-fold and 4-fold in K. pneumoniae ATCC 700603 and clinical isolate, respectively, with DNase I. The combination therapy caused 99% reduction in biofilm biomass in the mouse model.","PeriodicalId":19795,"journal":{"name":"Pathogens and disease","volume":"81 ","pages":""},"PeriodicalIF":3.3,"publicationDate":"2023-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10875075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction: Probiotics in vaginal health. 更正：阴道健康中的益生菌。

IF 3.3 4区医学

Pathogens and disease Pub Date : 2023-01-17 DOI: 10.1093/femspd/ftad027

引用次数: 0