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Infectious Disease: Parasitic Diseases

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Total 613 results found since Jan 2013.

The hidden impact of different Blastocystis genotypes on C-3 and IgE serum levels: a matter of debate in asthmatic Egyptian children
In conclusion,B. hominis possess a hidden allergy triggering impact that can be obscured by simultaneous high (total and specific) IgE levels towards specific common intestinal allergens. Blastocystosis induces allergy by increasing C-3 serum levels in a genotype-dependent manner being higher in genotype-3. Virulence of genotype-3 seems to stand beyond increased parasite intensity and wide absorption of intestinal allergens that indirectly elevate IgE serum levels.
Source: Journal of Parasitic Diseases - March 29, 2019 Category: Parasitology Source Type: research

Dietary Vitamin D3 Deficiency Increases Resistance to Leishmania (Leishmania) amazonensis Infection in Mice
Conclusion Altogether, our results indicate that dietary VitD deficiency is able to decrease lesion growth and provide an increase in Th1 response in C57BL/6 and BALB/c mice upon L. (L.) amazonensis infection, although it does not decrease parasite burden in either of the murine models used. Thus, VitD may contribute to host susceptibility to murine tegumentary leishmaniasis. Further studies on the influence of immunonutrition in the leishmaniases are needed to better understand the immunobiology of these diseases. Author Contributions HdMG conceived and designed the experiments. GO-S, DB, MM, JEP, JCP, TR, AdF-M, and L...
Source: Frontiers in cellular and infection microbiology - April 9, 2019 Category: Microbiology Source Type: research

The Differentiation in vitro of Human Tonsil B Cells With the Phenotypic and Functional Characteristics of T-bet+ Atypical Memory B Cells in Malaria
This study was conducted in the rural village of Kalifabougou, Mali where intense P. falciparum transmission occurs from June to December each year. Isolation of Tonsil B Cells Tonsils were mechanically disrupted in complete RPMI (RPMI 1640 with L-glutamine supplemented with 10% heat-inactivated FBS, 1 mM sodium pyruvate, 1% MEM nonessential amino acids, 50 μM 2-mercaptoethanol, 100 U/ml penicillin, 100 μg/ml streptomycin, and 25 mM HEPES, pH 7.2–7.5 [all from GIBCO, Invitrogen]) and passed through a 70-μm cell strainer to make a single cell suspension. B cells were then negatively selecte...
Source: Frontiers in Immunology - April 23, 2019 Category: Allergy & Immunology Source Type: research

Systems Biology Analysis of the Effect and Mechanism of Qi-Jing-Sheng-Bai Granule on Leucopenia in Mice
Conclusion In summary, our data reveal the therapeutic mechanism of QJSB by integrative application of transcriptomics-based network pharmacology and metabolomics technologies. QJSB exerts protective effect against leucopenia in mice through participating in multi-pathways, mainly including accelerating cell proliferation and differentiation, regulating metabolism response pathways and modulating immunologic function. Ethics Statement All animal studies were performed according to the institutional ethical guidelines of animal care and were approved by the Committee on the Ethics of Animal Experiments of the Second Mili...
Source: Frontiers in Pharmacology - April 24, 2019 Category: Drugs & Pharmacology Source Type: research

Human Gut-Associated Natural Killer Cells in Health and Disease
Alessandro Poggi1*, Roberto Benelli2, Roberta Venè1, Delfina Costa1, Nicoletta Ferrari1, Francesca Tosetti1 and Maria Raffaella Zocchi3 1Molecular Oncology and Angiogenesis Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy 2Immunology Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy 3Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy It is well established that natural killer (NK) cells are involved in both innate and adaptive immunity. Indeed, they can recognize molecules induced at the cell surface by stress signals...
Source: Frontiers in Immunology - May 2, 2019 Category: Allergy & Immunology Source Type: research

A near-fatal Valley Fever case opens doors to new treatment method
Of the 8,000 Californians who will contract Valley Fever this year, most will recover without treatment, and those with more serious cases will require an antifungal medication that clears the infection. But a few will experience a life-threatening form of the disease that ravages the body for reasons unknown.Now, an experimental treatment used by physicians atUCLA Mattel Children ’s Hospital that cured a 4-year-old boy may provide an explanation — and a method for manipulating the immune system to combat not just Valley Fever, but a host of infections.In February 2018, the Gonzalez-Martinez family traveled 200 miles f...
Source: UCLA Newsroom: Health Sciences - July 10, 2019 Category: Universities & Medical Training Source Type: news

Allergen presensitization drives an eosinophil-dependent arrest in lung-specific helminth development
This study investigates the relationship between helminth infection and allergic sensitization by assessing the influence of preexisting allergy on the outcome of helminth infections, rather than the more traditional approach in which the helminth infection precedes the onset of allergy. Here we used a murine model of house dust mite–induced (HDM-induced) allergic inflammation followed by Ascaris infection to demonstrate that allergic sensitization drives an eosinophil-rich pulmonary type 2 immune response (Th2 cells, M2 macrophages, type 2 innate lymphoid cells, IL-33, IL-4, IL-13, and mucus) that directly hinders larva...
Source: Journal of Clinical Investigation - August 5, 2019 Category: Biomedical Science Authors: Pedro H. Gazzinelli-Guimaraes, Rafael de Queiroz Prado, Alessandra Ricciardi, Sandra Bonne-Année, Joshua Sciurba, Erik P. Karmele, Ricardo T. Fujiwara, Thomas B. Nutman Source Type: research

What Can Parasites Tell Us About the Pathogenesis and Treatment of Asthma and Allergic Diseases
The same mechanisms that enable host defense against helminths also drive allergic inflammation. This suggests that pathomechanisms of allergic diseases represent evolutionary old responses against helminth parasites and that studying antihelminth immunity may provide insights into pathomechanisms of asthma. However, helminths have developed an intricate array of immunoregulatory mechanisms to modulate type 2 immune mechanisms. This has led to the hypothesis that the lack of helminth infection may contribute to the rise in allergic sensitization in modern societies. Indeed, the anti-inflammatory potential of helminth (worm...
Source: Frontiers in Immunology - September 10, 2020 Category: Allergy & Immunology Source Type: research

The Two Faces of Nematode Infection: Virulence and Immunomodulatory Molecules From Nematode Parasites of Mammals, Insects and Plants
Helminths stage a powerful infection that allows the parasite to damage host tissue through migration and feeding while simultaneously evading the host immune system. This feat is accomplished in part through the release of a diverse set of molecules that contribute to pathogenicity and immune suppression. Many of these molecules have been characterized in terms of their ability to influence the infectious capabilities of helminths across the tree of life. These include nematodes that infect insects, known as entomopathogenic nematodes (EPN) and plants with applications in agriculture and medicine. In this review we will f...
Source: Frontiers in Microbiology - December 2, 2020 Category: Microbiology Source Type: research

Eosinophils as Major Player in Type 2 Inflammation: Autoimmunity and Beyond
Adv Exp Med Biol. 2021 May 26. doi: 10.1007/5584_2021_640. Online ahead of print.ABSTRACTEosinophils are a subset of differentiated granulocytes which circulate in peripheral blood and home in several body tissues. Along with their traditional relevance in helminth immunity and allergy, eosinophils have been progressively attributed important roles in a number of homeostatic and pathologic situations. This review aims at summarizing available evidence about eosinophils functions in homeostasis, infections, allergic and autoimmune disorders, and solid and hematological cancers.Their structural and biological features have b...
Source: Advances in Experimental Medicine and Biology - May 25, 2021 Category: Research Authors: Marco Folci Giacomo Ramponi Ivan Arcari Aurora Zumbo Enrico Brunetta Source Type: research

The effect of infectious agents on the prevalence of allergies
CONCLUSIONS: A history of some forms of either infectious or parasitic diseases has a measurable effect on the risk of developing allergies.PMID:34597894 | DOI:10.1016/j.advms.2021.08.002
Source: Advances in Medical Sciences - October 1, 2021 Category: Biomedical Science Authors: Edyta Krzych-Fa łta Oksana Wojas Filip Raciborski Aneta Tomaszewska Piotr Samel-Kowalik Konrad Furma ńczyk Edward Si ński Ma łgorzata Bednarska Daniel Rabczenko Boles ław Samoliński Source Type: research