Showing posts with label lipopolysaccharide. Show all posts
Showing posts with label lipopolysaccharide. Show all posts

Saturday, 4 October 2025

Effect of Sodium Chloride on the Growth of Acinetobacter baumannii | Chapter 13| Contemporary Research and Perspectives in Biological Science Vol. 3

 

Acinetobacter baumannii is a major opportunistic nosocomial pathogen. Sodium chloride is one of the elements that is necessary for the survival of some bacterial species. A. baumannii does not show a high salt tolerance, unlike other salt-tolerant bacteria. The purpose of this study is to identify the effect of NaCl on A. baumannii. In this study two isolates of A. baumannii have been used, the local isolate HHR1 and the global isolate ATCC 17904. The isolates were routinely cultured on Nutrient agar and MacConkey agar media under aerobic conditions at 37˚C for 24 hours. Firstly, the influence of NaCl on the growth of two isolates of A. baumannii was monitored and the effect of two concentrations of NaCl on Lipopolysaccharide components was determined by SDS-PAGE. SDS-PAGE was done by using the Bio-Rad system according to, using Promega (USA) system. 12 % resolving gel and 4 % stacking gel were prepared and set. The result showed that HHR1 after 20 hr of incubation period reached 0.6 at OD600 in the presence of salt, while the control was continued, whereas, A. baumannii ATCC didn’t exert any defect growth. Moreover, NaCl has greatly affected the LPS components, where only O-antigen has appeared under 1% NaCl in A. baumannii HHR1 and 3% NaCl in A. baumannii ATCC.

 

Author (s) Details

Nagham Saadi Mohammed
Department of Biology, College of Science for Women, University of Baghdad, Baghdad, Iraq.

 

Halah H. A-Haideri
Department of Biology, College of Science for Women, University of Baghdad, Baghdad, Iraq and Department of Pharmacology and Toxicology, College of Pharmacy, Mustansiriyah University, Iraq.

 

Please see the book here:- https://doi.org/10.9734/bpi/crpbs/v3/2316

Tuesday, 5 September 2023

Chronic Inflammation by LPS Aggravates Rotenone Neurotoxicity and Circadian Clock Disruption in Rats | Chapter 15 | Novel Research Aspects in Medicine and Medical Science Vol. 1

 In this division, we investigated when aforementioned a condition happens in rats and whether specific low-grade neuroinflammation ability exacerbate rotenone (ROT) neurotoxicity and harm circadian clock gene/protein verbalizations. Parkinson’s disease (PD) is a neurodegenerative disorder primarily from motor dysfunction. Aging is preeminent supporter risk factor for developing PD. Recent microscopic genetic studies have disclosed that genetic factors, apart from aging and tangible factors, play an main role in the development of the disorder. Parkinson's disease (PD) was persuaded in mice subsequently a single situation with lipopolysaccharide (LPS) through low-grade neuroinflammation many months later. Three months following in position or time receiving two injections of LPS (2.5-7.5 mg/kg) in male rats, neuroinflammation and dopamine container loss were apparent. Rats were given modest doses of ROT (0.5 mg/kg, sc, 5 opportunities/week for 4 weeks) seven months later receiving a alone injection of LPS (5 mg/kg) to study the effects of inferior neuroinflammation on ROT toxicity. LPS plus ROT produced more distinct non-motor and engine dysfunctions than LPS or ROT alone in Open-field, Elevated plus maze, Y-confusion and Rotarods tests, and decreased mitochondrial complex 1 exercise, together with aggravated neuroinflammation and neuron misfortune. LPS, ROT, and LPS + ROT groups showed lower verbalization of the clock center genes brain and muscle Arnt-like protein-1 (Bmal1), locomotor amount cycles ruined (Clock), and neuronal PAS domain protein-2 (Npas2). The verbalizations of circadian feedback genes Periods (Per1 and Per2) were still reduced, but Cryptochromes (Cry1 and Cry2) were unchanged. The circadian clock mark genes nuclear receptor Rev-Erb α (Nr1d1), and D-box-binding protein (Dbp) expressions were too decreased. Consistent accompanying the transcript levels, internal clock protein BMAL1, CLOCK, NR1D1 and DBP were also decreased. LPS-inferred chronic inferior neuroinflammation potentiated ROT neurotoxicity and disrupted internal clock gene/protein expression, suggesting a function of disrupted occurring every day in PD development and progression.

Author(s) Details:

Huan Li,
Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China and Nanjing University Affiliated Nanjing Drum Tower Hospital, Nanjing, China.

Sheng Song,

National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC 27709, USA.

Shang-Fu Xu,
Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China.

Chun Huang,
Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China.

Feng Zhang,
Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China.

Jie Liu,
Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China and National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC 27709, USA.

Jau-Shyong Hong,

National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC 27709, USA.


Please see the link here: https://stm.bookpi.org/NRAMMS-V1/article/view/11796

Friday, 16 October 2020

Immunodominant Epitopes Identified on the LPS from Different Enterobacteria Using Phage Display | Chapter 9 | Recent Progress in Microbiology and Biotechnology Vol. 3

 Context: The etiological agents of intestinal infection are Escherichia coli and Salmonella. The existence of mutual epitopes between lipopolysaccharides (LPSs) of E. was shown by a previous study. O157 coli and Salmonella. Goal: The aim of this research was to identify mimotopes of shared epitopes in various enterobacterial LPSs using phage displays. Methods: We are using IgG anti-LPS from E. Coli O157 and Salmonella for the selection of M13 phage peptide mimotopes. The amino acid sequence of the mimotopes was used to synthesise peptides that were used for rabbit immunisation in turn. ELISA and Western blot assays analysed the antibody reaction of the resulting sera against the LPSs and synthetic peptides (SPs), showing that the same antibody recognised LPS sites. The reactions of human serum samples collected from the general population against the SPs and LPSs were also analysed in a complementary test. 


Results: Sixty phagotopes have been selected from the last biopanning phase. The peptide mimotope amino acid sequence review showed that the S / N / A / PF motif was a typical sequence in 4 of them. SP287/3, SP459/1, SP308/3, and SP073/14 immunised rabbit serum antibodies respond against both their own peptides and separate LPSs. The Western blot test suggests a reaction of sera against both the lateral chains and the LPS cores. The human serum analysis indicates a response to the SPs and LPSs. Conclusion: The conclusion of the study is the antibody responses to S. Typhus, S. S., Urbana. Arizonae, E. Coli O157 LPS obtained from immunised rabbits with SP287/3, SP459/1, SP308/3, and SP073/14 confirms that synthetic peptides are immunogenic mimotopes of the LPSs evaluated and that they can be considered as an alternative mechanism for defence against infections caused by LPSs. E. and Salmonella. However, previous studies with animal models of coli O157 are required to confirm their protective ability. Mimotopes of LPS epitopes of Salmonella and E are the synthetic peptides designed. Coli with immunogenic capabilities. In the design of vaccines against both enterobacteria, these mimotopes may be considered for use.

Author (s) Details

Armando Navarro
Departamento de Salud Pública, Facultad de Medicina, Universidad Nacional Autónoma de México, México.

Carlos A. Eslava-Campos
Unidad Periférica de Investigación Básica y Clínica en Enfermedades Infecciosas, División de Investigación de la Facultad de Medicina, UNAM, México and Laboratorio de Patogenicidad Bacteriana, Unidad de Hemato-Oncología e Investigación, Hospital Infantil de México Federico Gómez/Facultad de Medicina, UNAM, México.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/289