نتایج جستجو برای: agr

تعداد نتایج: 1447  

Journal: :Journal of bacteriology 2007
Jeremy M Yarwood Kara M Paquette Ilya B Tikh Esther M Volper E Peter Greenberg

Several serious diseases are caused by biofilm-associated Staphylococcus aureus. Colonial variants occur in biofilms of other bacterial species, and S. aureus variants are frequently isolated from biofilm-associated infections. Thus, we studied the generation of variants with altered expression of virulence factors in S. aureus biofilms. We observed that the number of variants found in biofilms...

Journal: :Infection and immunity 2003
Katherine A Schmidt Adhar C Manna Ambrose L Cheung

Staphylococcus aureus is a gram-positive pathogen that is capable of expressing a variety of virulence proteins in response to environmental signals. Virulence protein expression in S. aureus is controlled by a network of regulatory loci including sarA and agr. The sarA/agr network is associated with the expression of cell wall-associated adhesins during exponential growth and the expression of...

2018
Hui-Wen Guo Tang-Zhan Yuan Jia-Xi Chen Yang Zheng

The albumin/globulin ratio (AGR) has been widely reported to be a potential predictor of prognosis in digestive system cancers (DSCs), but convincing conclusions have not been made. Therefore, herein, we performed a meta-analysis of relevant studies regarding this topic to evaluate the prognostic value of AGR in patients with DSCs. Three databases, including PubMed, EMBase, and Web of science, ...

Journal: :The Journal of experimental biology 2007
Carmen R Smarandache Wolfgang Stein

Sensory input is pervasive among motor networks and continuously adapts motor patterns to changing circumstances. To elucidate common principles of sensorimotor integration, it is beneficial to characterize sensory influences on motor network operation and compare these influences between species. To facilitate such comparison, we have studied the influence of the anterior gastric receptor (AGR...

Journal: :The Journal of infectious diseases 2010
Pamela A Moise Alan Forrest Arnold S Bayer Yan Q Xiong Michael R Yeaman George Sakoulas

BACKGROUND Vancomycin susceptibility, the accessory gene global regulator (agr) genotype and function, staphylococcal cassette chromosome (SCC) mec type, and susceptibility to cationic thrombin-induced platelet microbicidal protein 1 (tPMP-1) have been individually predictive of duration of methicillin-resistant Staphylococcus aureus (MRSA) bacteremia. This investigation evaluated the interrela...

Journal: :Journal of bacteriology 2002
Jeremy M Yarwood John K McCormick Michael L Paustian Vivek Kapur Patrick M Schlievert

Subgenomic DNA microarrays were employed to evaluate the expression of the accessory gene regulator (agr locus) as well as multiple virulence-associated genes in Staphylococcus aureus. Gene expression was examined during growth of S. aureus in vitro in standard laboratory medium and rabbit serum and in vivo in subcutaneous chambers implanted in either nonimmune rabbits or rabbits immunized with...

2015
Mohammad Mohsenzadeh Kiarash Ghazvini Amir Azimian

Staphylococcus aureus is generally regarded as a leading cause of mastitis in dairy cattle. The aim of this study was to investigate the pattern of agr groups and any possible relationship between agr groups and antibiotic resistance among S. aureus strains isolated from bovine mastitis in Northeast of Iran. For this purpose, a total of 300 bovine mastitic milk samples were taken from dairy ind...

2017
Jiaxi He Hui Pan Wenhua Liang Dakai Xiao Xuewei Chen Minzhang Guo Jianxing He

Background: Albumin and globulin are main components of serum protein. The level of albumin and globulin partially represents the nutrition status and immune system. Albumin-to-globulin ratio (AGR) has been reported as a prognostic factor in various cancers. We therefore performed a meta-analysis to elucidate the prognosis effect of AGR on survival outcomes in solid tumors. Method: Six electron...

2017
Xiaobo He Shengjie Guo Dong Chen Guangwei Yang Xin Chen Yijun Zhang Qiuming He Zike Qin Zhuowei Liu Yunfei Xue Meng Zhang Ruiwu Liu Fangjian Zhou Hui Han Kai Yao

Background: Malnutrition and systemic inflammatory response are frequently associated with prognosis in patients with several types of cancer, including renal cell carcinoma (RCC). The study is aimed to investigate the ability of preoperative serum albumin to globulin ratio (AGR) to predict the long-term mortality of RCC patients. Methods: The study is a retrospective study of an unselected coh...

Journal: :Infection and immunity 1993
L B Regassa M J Betley

Expression of the staphylococcal enterotoxin type C gene (sec) is regulated in response to both high NaCl concentrations (osmolarity) and the accessory gene regulator (agr). agr is a global regulator that alters the expression of many genes in Staphylococcus aureus. In this report, we have demonstrated that osmoregulation of sec occurs at the level of mRNA independently of an intact agr allele....

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