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Effect of Lactobacillus supernatant on swarming-related gene expression in Proteus mirabilis isolated from urinary tract infections
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Proteus mirabilis isolates have been intensively researched for their capacity to cause urinary tract infections (UTIs) and their swarming motility, although little is known about this phenomenon. Probiotic Lactobacillus species, which are beneficial bacteria, are being studied worldwide as therapeutic and preventative agents against bacterial infections. This study investigated Lactobacillus supernatants as a potential new treatment against Proteus mirabilis. In addition to testing their antimicrobial and anti-swarming activities, the research also aimed to understand the genetic mechanisms behind the observed phenotypic changes. Methods. A total of 150 urine specimens were collected from UTI patients at various hospitals in Baghdad. Direct culture was performed by streaking the specimens on differential media. RNA was extracted and purified from the bacterial isolates, and then reverse transcription and quantitative PCR were used to evaluate swarming-related gene expression. Gene expression was assessed relative to a reference gene to reveal how probiotics regulate swarming behavior at the genetic level. Gene expression patterns varied, indicating complex genomic responses to Lactobacillus exposure. Results. UTIs affected 50 males (33.33%) and 100 females (66.66%) of various ages. Proteus mirabilis was identified in 30 (20%) of the 150 samples. Resistance was observed in 25 (83.33%) isolates for azithromycin and amoxicillin/clavulanic acid, and in 22 (73.33%) isolates for meropenem. Real-time PCR showed significant alterations in the expression of four swarming-related genes (rsbA, umoD, ZapA, and FliL). The rsbA gene showed a notable increase in expression, while another sample displayed a decrease. The umoD gene exhibited the largest change, with expression doubling in some cases. ZapA showed the greatest increase, nearly tripling in expression in one sample. FliL expression also rose in multiple isolates. Swarming activity was positively correlated with gene expression levels for rsbA (r = 0.8, p = 0.009), umoD (r = 0.635, p = 0.045), ZapA (r = 0.942, p = 0.001), and FliL (r = 0.894, p = 0.001). Conclusions. The study reveals a complex gene network regulating the swarming motility of Proteus mirabilis. It suggests that Lactobacillus acidophilus supernatants can modify gene expression and bacterial motility, potentially aiding in the treatment of UTIs.

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Publication Date
Sat Apr 15 2023
Journal Name
Iraqi Journal Of Science
Correlation between virulence factor and biofilm formation in Proteus spp.
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Urinary Tract Infection is an infection that caused by the members of the genus
Proteus that depends mainly on the availability of virulence factors ;Various
virulence factors including biofilm, swarming migration , polysaccharide
,heamolysin,protease, DNase, urease production weredetermined for 45Proteus
isolates that obtained from clinical specimens of Urinry Tract Infection patient .
The distribution of virulence factors was showed variation among the testedisolates
and strain specific in most cases. All Proteus isolates showed 45 (100%)biofilm ,
polysaccharide andSwarming capabilities with different extents. High
ureaseproduction was demonstrated in most isolates 40 (88.8%);In addition, they
were abling to

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Publication Date
Thu Feb 13 2025
Journal Name
Iraqi Journal Of Biotechnology
DETECTION OF GENE EXPRESSION OF SERINE PALMITOYLTRANSFERASE (SPT2) IN MOUSE CELL LINE RAW264.7 INFECTED WITH LEISHMANIA MEXICANA AMASTIGOTES
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Leishmania species are the causative agent of a tropical disease known as leishmaniasis. Previous studies on the old world species Leishmania major, showed that the amastigotes form which resides inside the macrophage of the vertebrate host, utilize host’s sphingolipids for survival and proliferation. In this study, gene expression of serine palmitoyltransferase (SPT) subunit two (MmLCB2) of the mouse macrophage cell line (RAW264.7), which is the first enzyme in the de novo sphingolipid biosynthesis, was detected in both infected and non-infected macrophages. This was detected under condition where available sphingolipid was reduced, with the new world species Leishmania mexicana. Results of qPCR analysis showed that there was no differen

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Publication Date
Thu Oct 01 2020
Journal Name
Biochemical And Cellular Archives
EFFECT OF EXPRESSION OF TAFAZZIN (TAZ) ON THE DEVELOPMENT OF CERVICAL CARCINOMA
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: Cervical cancer representsone of the possibly preventable cancer. The study was designed to find the possible correlation of Tafazzin on the progression of cervical carcinoma. Two groups of paraffinized blocks were included. The study group of 30 cervical tumors as well as 15 biopsies of healthy cervical tissues. After sectioning on a positive charge, immunohistochemical application (IHC) was performed to detect Tafazzin expression. Nighnty percentage (27 out of 30) of the studies group showed positive overexpression as shown in with a significant association of the expression with cervical cancer with a significant association. There is a possible role of TAZ in hastening the development of cervical cancer through different mechanisms. F

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Publication Date
Wed Jan 01 2014
Journal Name
Department Of Bioengineering And Sciences
1 T.R. KAHRAMANMARAŞ SÜTÇÜ İMAM UNIVERSITY GRADUATE SCHOOL OF NATURAL AND APPLIED SCIENCE Cloning and overexpression of Lactobacillus acidophilus bile salt hydrolase A gene (bshA) in Escherichia coli
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The bile salt hydrolase gene (bshA), encoding bile salt hydrolase enzyme (EC 3.5.1.24) from probiotic isolate Lactobacillus acidophilus Ar strain which is responsible for assimilation cholesterol were studied in the present work. About 801 bp in length DNA fragment of Lb. acidophilus Ar strain was amplified by PCR techniques. Two restriction sites (PstI/SacI) were added to each end of that fragment for manipulation of DNA during cloning. Amplified fragment inserted into pJET1.2\blunt end vector and pMG36e vector respectively. pJET1.2\blunt end vector is overexpression plasmid for E. coli MC1022, and pMG36e vector is a shuttle vector which is able to replicate in both E. coli and lactic acid bacteria. The resulted constructs were named as pJ

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Publication Date
Thu Jul 21 2022
Journal Name
Journal Of Advanced Biotechnology And Experimental Therapeutics,
Effect of gentamicin and doxycycline on expression of relB and relE genes in Klebsiella pneumonia
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Publication Date
Sat Sep 23 2017
Journal Name
Ibn Al-haitham Journal For Pure And Applied Sciences
Study on Protease Produced by Pseudomonas aeruginosa Isolated From Clinical Cases
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Fifty  isolates   of  Psel.ldomonas  aeruginosa were  obtained   from

(170)  isoiates  of ctlinical cases. Sensitivity  of the isolates t()  antibiotic leveled   showed   a   high   resistance    to   cefotaxime,  ceftazidime, gentamicin  and  tobramycin.  To  less  extent   was  the  resistance   to· amikacin  and  ciprofloxacine.  All isolates of        Pseudomonas aeru,ginosa were highly sensitive  tocefepime and imipenem.

Eighty six  perce

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Publication Date
Wed May 01 2024
Journal Name
Biology
Lysophosphatidylcholine Acetyltransferase 2 (LPCAT2) Influences the Gene Expression of the Lipopolysaccharide Receptor Complex in Infected RAW264.7 Macrophages, Depending on the E. coli Lipopolysaccharide Serotype
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Escherichia coli (E. coli) is a frequent gram-negative bacterium that causes nosocomial infections, affecting more than 100 million patients annually worldwide. Bacterial lipopolysaccharide (LPS) from E. coli binds to toll-like receptor 4 (TLR4) and its co-receptor’s cluster of differentiation protein 14 (CD14) and myeloid differentiation factor 2 (MD2), collectively known as the LPS receptor complex. LPCAT2 participates in lipid-raft assembly by phospholipid remodelling. Previous research has proven that LPCAT2 co-localises in lipid rafts with TLR4 and regulates macrophage inflammatory response. However, no published evidence exists of the influence of LPCAT2 on the gene expression of the LPS receptor complex induced by smooth or rough b

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Publication Date
Sun Jan 01 2023
Journal Name
Journal Of Advanced Pharmaceutical Technology & Research
Hesperetin effect on MLH1 and MSH2 expression on breast cancer cells BT-549
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Publication Date
Wed Feb 01 2023
Journal Name
Tropical Journal Of Natural Product Research
Expression of algD Gene in Single- and Dual-Species Biofilms of Pseudomonas aeruginosa and Staphylococcus aureus Under Starvation Stress
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Dual-species biofilms of Pseudomonas aeruginosa and Staphylococcus aureus generate difficult-to-treat illnesses. Nutrition stress in biofilms affects physiology, microbial metabolism, and species interactions, impacting bacteria growth and survival. Furthermore, the function of alginate, which is encoded by the algD gene, in the production of biofilms has been established. The present study aimed at investigating the impact of starvation on algD gene expression in single-species biofilm of P. aeruginosa and dual-species biofilms of P. aeruginosa and S. aureus from hospital sewage. A total of six P. aeruginosa and six S. aureus isolates were obtained from the microbiology laboratory at the Department of Biology, College of Science, Universit

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Publication Date
Mon Dec 30 2013
Journal Name
Scholars Academic Journal Of Biosciences (sajb)
Synergistic effect of mountain honey and Argemone mexicana plant on bacteria associated with wound infections
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Forty five wound specimens were collected from patients suffering from wound infections and taken from various hospitals in Ibb city, Yemen. The study was to determine synergic antibacterial activity of between mountain honey and Argemone mexicana plant. Isolation, identification of bacterial isolates and antibiotic sensitivity test were done. Agar-disc and agar-well diffusion method were carried to determine antibacterial activity of honey, Argemone mexicana plant and a mixture of them against bacterial isolates. Out of 45 specimens, 29 (64.4%) gave positive cultures. Staphylococcus aureus was the predominant bacterial pathogens with percentage (72.4%) followed by Pseudomonas aeruginosa (17.2%) and Staphylococcus epidermidis (10.4%).

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