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PubMed Journals Articles About "Activates Immune Response Mice That Persists Least Three" RSS

12:44 EDT 2nd April 2020 | BioPortfolio

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Showing "Activates Immune Response Mice That Persists Least Three" PubMed Articles 1–25 of 23,000+

Immune response to chronic Toxocara canis infection in a mice model.

The zoonotic nematode Toxocara canis causes larvae migrans syndrome that induces an immune response characterised by the production of antibodies and eosinophilia. A Th2 polarization has been associated with the infection, but there are still details of the cellular and humoral immune response that need to be described. Thus, the aim of this study is to describe the systemic host immune response to T. canis chronic infection in a mouse model.


The peripheral immune response of mice infected with a neuropathogenic schistosome.

Trichobilharzia regenti (Schistosomatidae) percutaneously infects birds and mammals and invades their central nervous system (CNS). Here we characterised the peripheral immune response of infected mice and showed how it was influenced by the parasite-induced inflammation in the skin and the CNS.

The ROP16III-dependent early immune response determines the subacute CNS immune response and type III Toxoplasma gondii survival.

Toxoplasma gondii is an intracellular parasite that persistently infects the CNS and that has genetically distinct strains which provoke different acute immune responses. How differences in the acute immune response affect the CNS immune response is unknown. To address this question, we used two persistent Toxoplasma strains (type II and type III) and examined the CNS immune response at 21 days post infection (dpi). Contrary to acute infection studies, type III-infected mice had higher numbers of total CNS ...


Expression Kinetics and Innate Immune Response after Electroporation and LNP-Mediated Delivery of a Self-Amplifying mRNA in the Skin.

In this work, we studied the expression kinetics and innate immune response of a self-amplifying mRNA (sa-RNA) after electroporation and lipid-nanoparticle (LNP)-mediated delivery in the skin of mice. Intradermal electroporation of the sa-RNA resulted in a plateau-shaped expression, with the plateau between day 3 and day 10. The overall protein expression of sa-RNA was significantly higher than that obtained after electroporation of plasmid DNA (pDNA) or non-replication mRNAs. Moreover, using IFN-β reporte...

Ras isoforms selectively regulate antigen-specific immune response.

H-/K-Ras and N-Ras isoforms were proposed to lack functional specificities due to similarity in 1-165 amino acids. As recent studies implied Ras isoform-specific developmental effects, we examined their functional specificity using Leishmania major infection, anti-hapten antibody response and carrier-specific T cell response. While N-Ras overexpression increased L. major infection in resistant C57BL/6 mice, H-Ras or K-Ras overexpression reduced the infection in susceptible BALB/c mice. These Ras isoforms di...

Enhancement of adaptive immune responses of aged mice by dietary intake of β-glucans, with special emphasis on anti-aging activity.

The naturally occurring polysaccharide, β-1,3-glucans, a well-known immunostimulant, has been highly valued for many years for their health-promoting and anti-aging properties, but its mode of action is poorly understood. In this study, we first showed that oral administration of β-1,3-glucans did not affect the general condition and physiology of male mice throughout the trial period. We then showed that dietary intake of β-1,3-glucans induced a significant increase in T helper cells (CD4) in young, mid...

Human cord blood (hCB)-CD34+ humanized mice fail to reject human acute myeloid leukemia cells.

Since their appearance, humanized mice carrying human immune system seemed promising tools to study the crosstalk between cancer and immunity. The NOD-scidIL2Rgammanull (NSG) mice engrafted with human cord blood (hCB)-CD34+ cells have been proposed to be a valuable tool to reproduce human immune system in mouse. However, the lack of solid evidences on the functionality of their human immune components limits their usage in immune-oncology. We report that (hCB)-CD34+ cells lose their ability to propagate and...

Bisphenol A Activates an Innate Viral Immune Response Pathway.

Bisphenol A (BPA) is a ubiquitous component in the manufacturing of plastic. It is commonly found in food and beverage containers. Because of its broad exposure and evidence that it may act as an estrogen-like molecule, many have studied its potential effects. Epidemiological studies have found an association between in utero BPA exposure and onset of childhood asthma. Our previous work suggested BPA treated mice induced asthma-like symptoms. Strikingly, these effects were observed in the progeny of exposed...

Alterations in composition of immune cells and impairment of anti-tumor immune response in aged oral cancer-bearing mice.

Aging has been suggested to be associated with immune dysregulation. An understanding of alterations in the host immunity with advancing age is, therefore, important for designing immune therapy for elderly cancer patients. In this context, not much is known about age-associated alterations in the immune system in oral cancer.

Microencapsulated plasmids expressing Gn and Gc glycoproteins of Rift Valley Fever virus enhance humoral immune response in mice.

The aim of the current study was to develop biodegradable alginate (ALG)/poly-L-lysine (PLL) microcapsules (MC) with entrapped plasmids expressing Gn and Gc glycoproteins of Rift Valley Fever virus (RVFV) and to evaluate the humoral immune response in mice.

USP44 positively regulates innate immune response to DNA viruses through deubiquitinating MITA.

Mediator of IRF3 activation (MITA, also known as stimulator of interferon genes, STING) senses the second messenger cyclic GMP-AMP (cGAMP) which is synthesized upon DNA virus infection and activates innate antiviral immune response. It has been demonstrated that the activity of MITA is delicately regulated by various post-translational modifications including polyubiquitination. In this study, we identified the deubiquitinating enzyme USP44 as a positive regulator of MITA. USP44 is recruited to MITA followi...

Cell-mediated immune response associated with Chlamydia pneumoniae infection in atherosclerotic patients.

Chlamydia pneumoniae is an obligate intracellular bacterium that activates cell mediated immune responses; several investigations have demonstrated its strong implication in atherosclerosis.

Expression of Helicobacter pylori CagL gene in Lactococcus lactis MG1363 and evaluation of its immunogenicity as an oral vaccine in mice.

Helicobacter pylori is a gram negative pathogen which commonly colonizes in the human gastric mucosa from early childhood and persists throughout life. CagL is a 27-kDa protein that is located at the tip of T4SS pili and highly conserved among pathogenic H. pylori strains. Lactic acid bacteria especially Lactococcus lactis (L. lactis) could serve as an antigen-delivering vehicle for the development of edible vaccine. In this study H. pylori CagL gene was cloned in pAMJ2008 vector and transferred to Lactococ...

Mice deficient in NKLAM have attenuated inflammatory cytokine production in a Sendai virus pneumonia model.

Recent studies have begun to elucidate a role for E3 ubiquitin ligases as important mediators of the innate immune response. Our previous work defined a role for the ubiquitin ligase natural killer lytic-associated molecule (NKLAM/RNF19b) in mouse and human innate immunity. Here, we present novel data describing a role for NKLAM in regulating the immune response to Sendai virus (SeV), a murine model of paramyxoviral pneumonia. NKLAM expression was significantly upregulated by SeV infection. SeV-infected mic...

Transethnic associations among immune-mediated diseases and single-nucleotide polymorphisms of the aryl hydrocarbon response gene ARNT and the PTPN22 immune regulatory gene.

Because immune responses are sensitive to environmental changes that drive selection of genetic variants, we hypothesized that polymorphisms of some xenobiotic response and immune response genes may be associated with specific types of immune-mediated diseases (IMD), while others may be associated with IMD as a larger category regardless of specific phenotype or ethnicity.

Ataxia-telangiectasia mutated is required for the development of protective immune memory after influenza A virus infection.

Ataxia-telangiectasia (A-T) is a neurodegenerative disorder affecting approximately 1 in 40,000 to 100,000 children caused by mutations in the () gene. Recurrent respiratory infections are a common and challenging co-morbidity often leading to the development of bronchiectasis in A-T individuals. The role of ATM in development of immune memory in response to recurrent respiratory viral infections is not well understood. Here, we infect wildtype (WT) and Atm-null mice with influenza A virus (IAV; HKx31, H3N2...

IL-18 immunoadjuvanted xenogeneic canine MMP-7 DNA vaccine overcomes immune tolerance and supresses the growth of murine mammary tumor.

The development of the tumorigenesis and angiogenesis through proteolytic cleavage of extracellular matrix protein and basement membranes is promoted by Matrix metelloproteinases-7 (MMP-7). Consequently, MMP-7 is presumed as potential target for mammary cancer immunotherapy. However, MMP-7 is an endogenous tumor associated antigen (TAA); therefore, immunization is challenging. In current study, a potent anti-tumor immune response has been elicited through recombinant bivalent plasmid pVIVO2.IL18.cMMP7 which...

B6.Rag1 Knockout Mice Generated at the Jackson Laboratory in 2009 Show a Robust Wild-Type Hypertensive Phenotype in Response to Ang II (Angiotensin II).

A key finding supporting a causal role of the immune system in the pathogenesis of hypertension is the observation that knockout mice on a C57Bl/6J background (B6.Rag1), which lack functional B and T cells, develop a much milder hypertensive response to Ang II (angiotensin II) than control C57Bl/6J mice. Here, we report that we never observed any Ang II resistance of B6.Rag1 mice purchased directly from the Jackson Laboratory as early as 2009. B6.Rag1 mice displayed nearly identical blood pressure increase...

Loss of core fucosylation suppressed the humoral immune response in Salmonella typhimurium infected mice.

The humoral immune response is pivotal to protect the host from Salmonella typhimurium (S. typhimurium) infection. Previously, we found that core fucosylation catalyzed by core fucosyltransferase (Fut8) could regulate the immune responses. However, the role of core fucosylation during S. typhimurium infection remains unclear.

An HBV-encoded miRNA activates innate immunity to restrict HBV replication.

We previously identified that the hepatitis B virus (HBV) encodes a microRNA (HBV-miR-3) that restrains HBV replication by targeting the HBV transcript. However, whether HBV-miR-3 affects host innate immunity to modulate HBV replication remains unclear. Here, we examined the vital functions of HBV-miR-3 in the innate immune response after HBV infection. We found that HBV-miR-3 expression gradually increased in a dose- and time-dependent manner in HBV-infected HepG2-NTCP cells. HBV-miR-3 activated the JAK/ST...

Heat-killed Mycobacterium paragordonae therapy exerts an anti-cancer immune response via enhanced immune cell mediated oncolytic activity in xenograft mice model.

A therapeutic strategy capable of skewing toward a Th1-type immune response is crucial for cancer treatment. Recently, we reported Mycobacterium paragordonae (Mpg) as a potential live vaccine for mycobacterium infections. In this study, we explored the immunotherapeutic potential of heat-killed Mpg (HK-Mpg) in a mouse tumor xenograft model and elucidated its underlying antitumor mechanisms. MC38 cells derived from murine colon adenocarcinoma were implanted by subcutaneously injecting mice. The anticancer ef...

MAP kinase phosphatase-1, a gatekeeper of the acute innate immune response.

Mitogen-activated protein kinase (MAPK) cascades are crucial signaling pathways in the regulation of the host immune response to infection. MAPK phosphatase (MKP)-1, an archetypal member of the MKP family, plays a pivotal role in the down-regulation of p38 and JNK. Studies using cultured macrophages have demonstrated a pivotal role of MKP-1 in the restraint of the biosynthesis of both pro-inflammatory and anti-inflammatory cytokines as well as chemokines. Using MKP-1 knockout mice, several groups have not o...

The innate immune perspective of autoimmune and autoinflammatory conditions.

Innate immunity is one of two immune defence system arms. It is present at birth and does not require 'learning' through exposure to foreign organisms. It activates various mechanisms collectively to eliminate pathogens and hold an infection until the adaptive response are mounted. The innate immune system consists of four elements: the epithelial barrier, cells (e.g. macrophages, NK cells), plasma proteins (e.g. complement) and cytokines. These components act in concert to induce complex processes, as well...

Immune response and protection against Lawsonia intracellularis infections in pigs.

Lawsonia intracellularis are Gram-negative, obligate intracellular bacteria that cause proliferative enteropathy (PE), an economically important disease for the pig industry. Numerous reviews have been published on the characteristics and pathogenesis of this bacterium since its isolation and taxonomic characterization, with most reviews only partially covering how the host immune response develops during infection and the immune correlates of protection. With the development of increasingly more sophistica...

Six-week inhalation of CdO nanoparticles in mice: The effects on immune response, oxidative stress, antioxidative defense, fibrotic response, and bones.

Due to the growing number of applications of cadmium oxide nanoparticles (CdO NPs), there is a concern about their potential deleterious effects. The objective of our study was to investigate the effect of CdO NPs on the immune response, renal and intestine oxidative stress, blood antioxidant defence, renal fibrotic response, bone density and mineral content. Six-week-old female ICR mice were exposed to CdO NPs for 6 weeks by inhalation (particle size: 9.82 nm, mass concentration: 31.7 μg CdO/m, total ...


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