background: h pylori is a human gastric pathogen. chemotaxis is an essential factor in colonization of h pylori , but very little is known about its chemotactic responses at different ph conditions, especially in acidic environment of stomach as its natural habitant.   methods: we first determined survival of h pylori under various ph conditions in the presence and absence of urea.  chemotaxis ...

statement of problem: papillon lefevre syndrome (pls) is a rate autosomal recessive disorder, which is characterized by palmar- plantar hyperkeratosis and rapid periodontal destruction of primary and permanent dentitions. purpose: the aim of the present study was to evaluate the peripheral blood neutrophil function including random locomotion, chemotaxis and oxidative mechanism of killing in a ...

Background: H pylori is a human gastric pathogen. Chemotaxis is an essential factor in colonization of H pylori, but very little is known about its chemotactic responses at different pH conditions, especially in acidic environment of stomach as its natural habitant. Methods: We first determined survival of H pylori under various pH conditions in the presence and absence of urea.  Chemotaxis was...

Objective(s) Motility plays a major role in pathogenicity of Helicobacter pylori, yet there is  scarce data regarding its chemotactic behaviour. The present study was designed to investigate the chemotactic responses of local isolates of H. pylori towards various sugars, amino acids, as well as some other chemical substances. Materials and Methods Chemotaxis was assayed by a modified Adler’s...

a case of palmoplantar hyperkeratosis with periodontosis and a history of recurrent severe pyoderma, pneumonia and multiple liver abscesses is described in a 12 year old girl. the patient demonstrated neutrophil dysfunction characterized by decreased random migration and chemotaxis and defective bactericidal activity. the exact immunopathological mechanism for susceptibility to infections in pa...

statement of problem: patients affected with “early onset periodontitis” (eop), are not similar regarding their neutrophil deficiency and researches have yielded contradictory results in this field. purpose: the purpose of this study was to evaluate different aspects of neutrophils’ activities in peripheral blood of such patients, especially those affected with prepubertal periodontitis and juv...

Background: Spermatozoa are able to sense an attractant molecule gradient and as a consequence, orient their movement towards the source of the attractant. This mechanism is known as sperm chemotaxis. In recent years, our laboratory contributed to the knowledge of several features of mammalian sperm chemotaxis. These include the size and physiological state of the chemotactic sperm population, ...

objective(s) motility plays a major role in pathogenicity of helicobacter pylori, yet there is  scarce data regarding its chemotactic behaviour. the present study was designed to investigate the chemotactic responses of local isolates of h. pylori towards various sugars, amino acids, as well as some other chemical substances. materials and methods chemotaxis was assayed by a modified adler’s me...

In this work, we rigorously study chemotaxis effect versus haptotaxis on boundedness, blow-up and asymptotical behavior of solutions for a chemotaxis-haptotaxis model in 2D settings. It is well-known that the corresponding Keller–Segel chemotaxis-only possesses striking feature critical mass blowup phenomenon, namely, subcritical ensures whereas, supercritical induces existence blow-ups. Herein...

in vitro culture systems using bone marrow cells from balb/c mice were set up in medium supplemented with spleen-derived medium. bone marrow cells grown in spleen-derived medium gave rise to cultures containing >97% mast cells. the cells were used in polarisation chemotaxis assays with the intention of determining the effect of nerve tissue-derived neurotransmitters on mast cell migration. some...