Bacterial adhesion and host cell factors leading to effector protein injection by type III secretion system.

Bacterial adhesion and host cell factors leading to effector protein injection by type III secretion system. Int J Med Microbiol. 2019 Jun 04;: Authors: Bohn E, Sonnabend M, Klein K, Autenrieth IB Abstract Type III secretion systems (T3SS) play a crucial role for virulence in many Gram-negative bacteria. After tight bacterial contact to host cells, the T3SS injects effector proteins into the host cells, which leads to cell invasion, tissue destruction and/or immune evasion. Over the last decade several attempts were made to characterize the host-cell interactions which precede and determine effector protein injection during infection. The development of the TEM-β-lactamase reporter was an important breakthrough to achieve this goal. By this means it was demonstrated that during infection with many Gram-negative pathogens such as Salmonella, Pseudomonas or Yersinia the main targets of T3SS are leukocytes of the myeloid lineage such as neutrophils, macrophages or dendritic cells. This is due to the recruitment of these cells to the site of infection, but also due to the specific interplay between bacterial and host cells. Comprehensive studies on Yersinia pestis, Yersinia enterocolitica and Yersinia pseudotuberculosis effector translocation show that adhesins such as Invasin (Inv), Yersinia adhesin A (YadA) and attachment and invasion locus (Ail) are critical for effector translocation. Here, mainly the complex interaction of YadA and Ail with various...
Source: International Journal of Medical Microbiology - Category: Microbiology Authors: Tags: Int J Med Microbiol Source Type: research

Related Links:

Publication date: Available online 22 October 2019Source: Biosensors and BioelectronicsAuthor(s): Mohammed Sedki, Xingyu Chen, Chuan Chen, Xin Ge, Ashok MulchandaniAbstractA highly sensitive and selective non-lytic M13 phage-based electrochemical impedance spectroscopy (EIS) cytosensor for early detection of coliforms is introduced for the first time. AuNPs were electrochemically deposited on the surface of glassy carbon electrode, and the M13 phage particles were immobilized on them using 3-mercaptopropanoic acid linker and zero-length crosslinking chemistry (EDC/NHS). Next, the sensor surface was blocked to avoid non-spe...
Source: Biosensors and Bioelectronics - Category: Biotechnology Source Type: research
Publication date: Available online 22 October 2019Source: Life SciencesAuthor(s): Li Lei, Meng Li, Yiqun Pang, Jun Wang, Yunpeng Wan, Chen Zhu, Yin ZongshengAbstractAimsPrevious study indicated that the increase of local bio-availability of 3′3′5-triiodothyronine (T3) influenced osteoarthritis (OA) initiation. We aimed to investigate the role of thyroid hormone receptors (THRs) signaling in OA osteoblasts.Materials and methodsTHRs expression in OA was detected by immunohistochemistry, immunofluorescence, RT-qPCR and western blotting. These effects on the expression of angiogenesis-related factors were examined ...
Source: Life Sciences - Category: Biology Source Type: research
Publication date: Available online 22 October 2019Source: Life SciencesAuthor(s): Chao He, Guiting Zhang, Hang Ouyang, Peng Zhang, Yudan Chen, Ren Wang, Hong ZhouAbstractAimsβ2-glycoprotein I/anti-β2-glycoprotein I antibody complex (β2/aβ2) could promote oxLDL-induced endothelial inflammation through Toll-like receptor 4 (TLR4), therefore accelerates atherosclerosis in patients with anti-phospholipid syndrome (APS). However, effects of β2/aβ2 and TLR4 on oxLDL-induced CD36 activation in macrophages remain to be elucidated and are currently under investigation.Materials and MethodsTHP-1 macroph...
Source: Life Sciences - Category: Biology Source Type: research
The objective of this study was to determine the carrying of STEC in Paraguayan bovines and to analyze the virulence profile and serotypes of these isolates. A total of 197 samples of bovine fecal samples and an average of 5 to 50 colonies from stx1/stx2 positive samples were studied. The stx1, stx2, saa, ehxA and eae genes were amplified by PCR. 84.8% of the cattle were carriers of STEC. The predominant virulence profiles were stx2 and stx2/saa/ehxA. The serotyping was performed by agglutination reactions for 60 selected isolates, resulting in isolation of serogroup O103, which could produce infections in humans. This wor...
Source: Revista Argentina de Microbiologia - Category: Microbiology Tags: Rev Argent Microbiol Source Type: research
Publication date: 15 January 2020Source: Catalysis Today, Volume 340Author(s): Sami Rtimi, John KiwiAbstractThis review focuses on the acceleration of the bactericidal and fungicidal effects by uniform, adhesive Cu-based nanocomposites on textile and thin polymer surfaces. The acceleration of the bacterial inactivation kinetics mediated by Cu, TiO2/Cu and ZrO2-TiO2-Cu films in aerobic and anaerobic media is discussed for Gram negative, Gram positive bacteria and fungi. The Cu induced bacterial inactivation kinetics in the dark was observed to occur within the minute range for diverse bacteria. The characterization of the i...
Source: Catalysis Today - Category: Chemistry Source Type: research
Analyst, 2019, Accepted Manuscript DOI: 10.1039/C9AN01753D, PaperKunhao Qin, Dongfang Zhang, Yafang Ding, Xiaodan Zheng, Yingying Xiang, Jianhao Hua, Qi Zhang, Xiuling Ji, Bo Li, Yunlin Wei Carbon dots (CDs) has broad prospective applications in various fields, and expanding the applications of fluorescent CDs, especially for CDs derived from bacteria, is a major research goal. In this... The content of this RSS Feed (c) The Royal Society of Chemistry
Source: RSC - Analyst latest articles - Category: Chemistry Authors: Source Type: research
This study aimed to characterize shifts in microbial community structure across the intestinal mucosa-enteric lymph node axis in order to understand the effects of two commonly used antibiotics (Linco-Spectin and Colistin sulfate; oral application). We hypothesized that these antibiotics influence GI microbiota diversity and community structure and that, as a result, the ICLN-ileum axis is altered through permeability changes and changed translocation patterns. Medicated-feed antibiotics are still heavily used, not only in the E.U. but worldwide in case of infections. In addition to the taxonomic community profiling survey...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
In this study, 12 O-antigen gene clusters of P. shigelloides, O2H1a1c (G5877), O10H41 (G5892), O12H35 (G5890), O23H1a1c (G5263), O25H3 (G5879), O26H1a1c (G5889), O32H37 (G5880), O33H38 (G5881), O34H34 (G5882), O66H3 (G5270), O75H34 (G5885), and O76H39 (G5886), were sequenced and analyzed. The genes that control O-antigen synthesis are present as chromosomal gene clusters that maps between rep and aqpZ, and most of the synthesis and translocation of OPS (O-specific polysaccharide) belongs to Wzx/Wzy pathway with the exception of O12, O25, and O66, which use the ATP-binding cassette (ABC) transporter pathway. Phylogenetic an...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
In this study, we provide further evidence for the general concept of T3SS-independent translocation by identifying novel cell-penetrating features of these LPX effectors revealing an abundant species-spanning family of CPE. PMID: 29285573 [PubMed - as supplied by publisher]
Source: Cellular and Molecular Life Sciences : CMLS - Category: Cytology Authors: Tags: Cell Mol Life Sci Source Type: research
Conclusions This study showed that patients with CHF may have intestinal overgrowth of pathogenic bacteria and Candida species and increased IP associated with clinical disease severity, venous blood congestion, and inflammation.
Source: JACC: Heart Failure - Category: Cardiology Source Type: research
More News: Dysentery | Gastroenteritis | Microbiology | Salmonella | Science | Study | Translocation | Yersinia