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Journal of Immunotoxicology

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https://www.readbyqxmd.com/read/29228829/vanadium-pentoxide-increased-pten-and-decreased-shp1-expression-in-nk-92mi-cells-affecting-pi3k-akt-mtor-and-ras-mapk-pathways
#1
Francisco Gallardo-Vera, Miguel Tapia-Rodriguez, Daniel Diaz, Teresa Fortoul van der Goes, Luis F Montaño, Erika P Rendón-Huerta
Vanadium is an air pollutant that imparts immunosuppressive effects on NK cell immune responses, in part, by dysregulating interleukin (IL)-2/IL-2R-mediated JAK signaling pathways and inducing apoptosis. The aim of the present study was to evaluate effects of vanadium pentoxide (V2O5) on other IL-2 receptor-mediated signaling pathways, i.e. PI3K-AKT-mTOR and Ras-MAPK. Here, IL-2-independent NK-92MI cells were exposed to different V2O5 doses for 24 h periods. Expression of PI3K, Akt, mTOR, ERK1/2, MEK1, PTEN, SHP1, BAD and phosphorylated forms, as well as caspases-3, -8, -9, BAX and BAK in/on the cells were then determined by flow cytometry...
December 2018: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/29185370/effect-of-nicotine-on-placental-ischemia-induced-complement-activation-and-hypertension-in-the-rat
#2
Connor F Laule, Cameron R Wing, Evan J Odean, Jacob A Wilcox, Jeffrey S Gilbert, Jean F Regal
Preeclampsia is a pregnancy-specific condition manifested by new-onset maternal hypertension with systemic inflammation, including increased innate immune system complement activation. While exact pathophysiology is unknown, evidence suggests that inadequate spiral artery invasion and resulting utero-placental insufficiency is the initiating event. Cigarette smoking during pregnancy decreases the risk of preeclampsia. Nicotine, a major component of cigarettes, stimulates the efferent cholinergic anti-inflammatory pathway through peripherally expressed nicotinic acetylcholine receptors (nAChR) and is known to attenuate ischemia-reperfusion injury in kidney and liver...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/29179596/celastrol-attenuates-impairments-associated-with-lipopolysaccharide-induced-acute-respiratory-distress-syndrome-ards-in-rats
#3
Yongjun Wei, Yu Wang
Celastrol, a constituent from a traditional Chinese medicinal herb belonging to the family Celastraceae, has been shown to impart anti-inflammatory properties, in part, by inhibiting NF-κB activity and related induction of pro-inflammatory cytokine formation/release. The present study investigated the effects of celastrol in an animal model of acute respiratory distress syndrome (ARDS) induced by intratracheal administration of lipopolysaccharides (LPSs). Celastrol pre-treatment groups received celastrol by intraperitoneal injection on seven consecutive days before LPS treatment...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/29141474/assessment-of-immunotoxicity-in-female-fischer-344-n-and-sprague-dawley-rats-and-female-b6c3f1-mice-exposed-to-hexavalent-chromium-via-the-drinking-water
#4
Kelly A Shipkowski, Christopher M Sheth, Matthew J Smith, Michelle J Hooth, Kimber L White, Dori R Germolec
Sodium dichromate dihydrate (SDD), an inorganic compound containing hexavalent chromium (Cr(VI)), is a common environmental contaminant of groundwater sources due to widespread industrial use. There are indications in the literature that Cr(VI) may induce immunotoxic effects following dermal exposure, including acting as both an irritant and a sensitizer; however, the potential immunomodulatory effects of Cr(VI) following oral exposure are relatively unknown. Following the detection of Cr(VI) in drinking water sources, the National Toxicology Program (NTP) conducted extensive evaluations of the toxicity and carcinogenicity of SDD following drinking water exposure, including studies to assess the potential for Cr(VI) to modulate immune function...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/29124973/divergent-hypersensitivity-responses-following-topical-application-of-the-quaternary-ammonium-compound-didecyldimethylammonium-bromide
#5
Hillary L Shane, Ewa Lukomska, Aleksandr B Stefaniak, Stacey E Anderson
Didecyldimethylammonium bromide (DDAB) is a fourth generation dialkyl-quaternary ammonium compound (QAC) that is used in numerous products for its antimicrobial properties. While many QACs have been associated with allergic disease, the toxicity and sensitization of DDAB have not been thoroughly investigated. The purpose of these studies was to evaluate the irritancy and sensitization potential of DDAB following dermal application in a murine model. DDAB induced significant irritancy (0.0625-2%), evaluated by ear swelling in female BALB/c mice...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/29096558/expression-of-aryl-hydrocarbon-receptor-inflammatory-cytokines-and-incidence-of-rheumatoid-arthritis-in-vietnamese-dioxin-exposed-people
#6
Chi Hung Nguyen, Taisuke Nakahama, Truong Tien Dang, Hoang Ha Chu, Luong Van Hoang, Tadamitsu Kishimoto, Nam Trung Nguyen
Many Vietnamese citizens have been and continue to be inadvertently exposed to dioxins and dioxin-like compounds deposited in the country during the Vietnam War. Dioxins may be involved in the pathogenesis of inflammatory diseases in part via by affecting expression of aryl hydrocarbon receptor (Ahr) and inflammatory cytokines in animal models. As the role of the Ahr in dioxin-exposed people is not well defined, a study was conducted to examine gene expression levels of Ahr, inflammatory cytokines, and the incidence of diseases in dioxin-exposed citizens who had/still resided near a heavily dioxin-contaminated area in Vietnam...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28805477/estimated-exposures-to-perfluorinated-compounds-in-infancy-predict-attenuated-vaccine-antibody-concentrations-at-age-5-years
#7
Philippe Grandjean, Carsten Heilmann, Pal Weihe, Flemming Nielsen, Ulla B Mogensen, Amalie Timmermann, Esben Budtz-Jørgensen
Perfluorinated alkylate substances (PFASs) are highly persistent and may cause immunotoxic effects. PFAS-associated attenuated antibody responses to childhood vaccines may be affected by PFAS exposures during infancy, where breastfeeding adds to PFAS exposures. Of 490 members of a Faroese birth cohort, 275 and 349 participated in clinical examinations and provided blood samples at ages 18 months and 5 years. PFAS concentrations were measured at birth and at the clinical examinations. Using information on duration of breastfeeding, serum-PFAS concentration profiles during infancy were estimated...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28720058/long-form-of-thymic-stromal-lymphopoietin-of-keratinocytes-is-induced-by-protein-allergens
#8
Yasutaka Kuroda, Takuo Yuki, Yutaka Takahashi, Hitoshi Sakaguchi, Kayoko Matsunaga, Hiroshi Itagaki
A growing body of evidence suggests that epicutaneous sensitization of protein allergens induces immediate-type hypersensitivity (IHS) following induction of Type 2 immune responses in animals and humans. Thymic stromal lymphopoietin (TSLP) derived from keratinocytes is a cytokine that can activate dendritic cells and has been implicated in development of inflammatory Type 2 helper T-cells. However, there is no direct evidence that allergens directly regulate TSLP expression in keratinocytes. This study aimed to evaluate the response of TSLP to protein allergens in cultured human keratinocytes and to identify appropriate endpoints for IHS...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28707492/bisphenol-a-bpa-aggravates-multiple-low-dose-streptozotocin-induced-type-1-diabetes-in-c57bl-6-mice
#9
Marina Cetkovic-Cvrlje, Sinduja Thinamany, Kylie A Bruner
Type 1 diabetes (T1D) is a T-cell-mediated autoimmune disorder characterized by destruction of insulin-producing pancreatic β-cells. Whereas epidemiological data implicate environmental factors in the increasing incidence of T1D, their identity remains unknown. Though exposure to bisphenol A (BPA) has been associated with several disorders, no epidemiologic evidence has linked BPA exposure and T1D. The goal of this study was to elucidate diabetogenic potentials of BPA and underlying mechanisms in the context of T-cell immunity, in a multiple low-dose streptozotocin (MLDSTZ)-induced autoimmune mouse T1D model...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28707490/transferon%C3%A2-a-peptide-mixture-with-immunomodulatory-properties-is-not-immunogenic-when-administered-with-various-adjuvants
#10
Sandra Avila, Leslie Muñoz-García, Said Vázquez-Leyva, Nohemí Salinas-Jazmín, Emilio Medina-Rivero, Lenin Pavón, Gabriela Mellado-Sánchez, Rommel Chacón-Salinas, Sergio Estrada-Parra, Luis Vallejo-Castillo, Sonia Mayra Pérez-Tapia
Transferon, a human dialyzable leukocyte extract (hDLE), is a biotherapeutic that comprises a complex mixture of low-molecular-weight peptides (< 10 kDa) and is used to treat diseases with an inflammatory component. Some biotherapeutics, including those composed of peptides, can induce anti-drug antibodies (ADA) that block or diminish their therapeutic effect. Nevertheless, few studies have evaluated peptide-derived drug immunogenicity. In this study, the immunogenicity of Transferon was examined in a murine model during an immunization scheme using the following adjuvants: Al(OH)3, incomplete Freund's adjuvant (IFA), or Titermax Gold...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28697661/safety-of-a-proteoliposome-from-neisseria-meningitides-as-adjuvant-for-a-house-dust-mite-allergy-vaccine
#11
Wendy Ramírez, Virgilio Bourg, Damaris Torralba, Elisa Facenda, Beatriz Tamargo, Bárbara O González, Gustavo Sierra, Oliver Pérez, Yordanis Perez-Llano, Alexis Labrada
The proteoliposome (PL) of Neisseria meningitidis serogroup B has been reported as a safe and potent vaccine adjuvant, inducing a TH1-skewed response. The present study describes a pre-clinical safety evaluation of an allergy therapeutic vaccine candidate based on purified allergens from Dermatophagoides siboney house dust mite and PL as adjuvant, both components adsorbed onto aluminum hydroxide gel. Two separate studies of acute toxicity evaluation were performed in mice and rabbits, and two repeat-dose studies were conducted in non-sensitized and allergen-sensitized Balb/c mice, respectively...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28693405/genetics-and-immunodysfunction-underlying-beh%C3%A3-et-s-disease-and-immunomodulant-treatment-approaches
#12
Arash Salmaninejad, Arezoo Gowhari, Seyedmojtaba Hosseini, Saeed Aslani, Meysam Yousefi, Tayyeb Bahrami, Masoume Ebrahimi, Abolfazl Nesaei, Masoud Zal
Behçet's disease (BD) is a chronic autoimmune condition primarily prevalent in populations along the Mediterranean Sea. The exact etiology of BD has not been fully explained yet, but the disease occurrence is associated with a genetic factor, human leukocyte antigen (HLA)-B51 antigen. Among the various immunodysfunctions that are found in BD, patients are increased neutrophil motility and superoxide production, as well as elevated production of tumor necrosis factor (TNF)-α and decreased production of interleukin (IL)-10...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28641471/evaluation-of-immunomodulatory-effects-of-zearalenone-in-mice
#13
Mohammad Rafiqul Islam, Jong Won Kim, Yoon-Seok Roh, Jong-Hoon Kim, Han Kang Min, Hyung-Joo Kwon, Chae Woong Lim, Bumseok Kim
Zearalenone (ZEA) is a non-steroidal estrogenic mycotoxin produced by Fusarium species. The toxicity of ZEA has been evaluated for reproductive and developmental effects; however, there is little evidence about its acute toxicity or general immunotoxicity. In the present study, immune regulatory functions were investigated in mice that had been exposed to ZEA (5 or 20 mg/kg BW) daily for 14 days. Results showed that sub-populations of CD4(+), CD8(+) and CD11c(+) cells in the spleen and CD4(+), CD8(+) and F4/80(+) cells in the mesenteric lymph nodes (MLN) of ZEA (20 mg/kg)-exposed hosts were decreased compared to those in the control mice...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28604134/impact-of-exposure-time-particle-size-and-uptake-pathway-on-silver-nanoparticle-effects-on-circulating-immune-cells-in-mytilus-galloprovincialis
#14
Younes Bouallegui, Ridha Ben Younes, Faten Turki, Ridha Oueslati
Nanomaterials have increasingly emerged as potential pollutants to aquatic organisms. Nanomaterials are known to be taken up by hemocytes of marine invertebrates including Mytilus galloprovincialis. Indeed, assessments of hemocyte-related parameters are a valuable tool in the determination of potentials for nanoparticle (NP) toxicity. The present study assessed the effects from two size types of silver nanoparticles (AgNP: <50 nm and <100 nm) on the frequency of hemocytes subpopulations as immunomodulation biomarkers exposed in a mollusk host...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28549401/human-in-situ-cytokine-and-leukocyte-responses-to-acute-smoking
#15
Tegan Kastelein, Rob Duffield, Frank Marino
This study examined immune/inflammatory parameters following an acute tobacco smoking episode in smokers with varying smoking histories. Twenty-eight male habitual smokers were categorized according to smoking history, e.g. younger smoker (YSM) or middle-aged smoker (MSM). Participants were matched for fitness and smoking habits and following baseline testing, undertook a smoking protocol involving consumption of two cigarettes within 15 min. Venous blood was collected pre- and immediately, 1 h, and 4 h post-protocol to permit analyses of circulating levels of interleukin (IL)-6, IL-1β, IL-1ra, monocyte chemoattractant protein-1 (MCP-1), C-reactive protein (CRP), and leukocytes...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28431492/anti-drug-antibodies-in-colombian-patients-with-rheumatoid-arthritis-treated-with-enbrel-vs-etanar-preliminary-report
#16
Benjamín Reyes-Beltrán, Gabriela Delgado
The present study was undertaken to detect antibodies against etanercept (ETN) in a group of Colombian patients with rheumatoid arthritis (RA) and being treated with Enbrel(®) vs. Etanar(®). From these patients with RA, clinical and laboratory data were collected and serum taken for anti-drug antibody (ADAb) analysis. Samples from 32 patients (16 who had been treated with Enbrel(®) and 16 with Etanar(®)) were analyzed. Positive sera for ADAb were found in six of the 32 subjects (18.7%); five (31.2%) in the Enbrel(®) group and one (6...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28366041/a-single-dose-of-trichloroethylene-given-during-development-does-not-substantially-alter-markers-of-neuroinflammation-in-brains-of-adult-mice
#17
Jacqueline R Meadows, Chevonne Parker, Kathleen M Gilbert, Sarah J Blossom, Jamie C DeWitt
Trichloroethylene (TCE) is a widespread environmental contaminant associated with developmental immunotoxicity and neurotoxicity. Previous studies have shown that MRL(+/+) mice exposed to TCE from gestation through early-life demonstrate robust increases in inflammatory markers in peripheral CD4(+) T-cells, as well as glutathione depletion and increased oxidative stress in cerebellum-associated with alterations in behavior. Since increased oxidative stress is associated with neuroinflammation, we hypothesized that neuroinflammatory markers could be altered relative to unexposed mice...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28279082/effects-of-immunization-and-checkpoint-inhibition-on-amodiaquine-induced-liver-injury
#18
Alastair Mak, Alexander Johnston, Jack Uetrecht
If idiosyncratic drug-induced liver injury (IDILI) is immune-mediated, it is possible that an individual's prior exposure to antigens may affect their susceptibility to IDILI. An individual's repertoire of memory immune cells is shaped by every past exposure to antigens. Subsequent drug-induced adverse drug reactions may therefore involve an immune cell's cross reactivity between a prior antigen and resulting drug-modified proteins. Therefore in this experiment, mice were immunized with amodiaquine (AQ)-modified hepatic proteins to mimic a previous exposure; treated with a RIBI adjuvant and anti-CD40 antibodies to stimulate an immune response; and, treated with anti-PD1 and anti-CTLA-4 antibodies prior to AQ treatment in order to overcome immune tolerance...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28121465/topical-application-of-the-anti-microbial-chemical-triclosan-induces-immunomodulatory-responses-through-the-s100a8-a9-tlr4-pathway
#19
Nikki B Marshall, Ewa Lukomska, Ajay P Nayak, Carrie M Long, Justin M Hettick, Stacey E Anderson
The anti-microbial compound triclosan is incorporated into numerous consumer products and is detectable in the urine of 75% of the general United States population. Recent epidemiological studies report positive associations with urinary triclosan levels and allergic disease. Although not sensitizing, earlier studies previously found that repeated topical application of triclosan augments the allergic response to ovalbumin (OVA) though a thymic stromal lymphopoietin (TSLP) pathway in mice. In the present study, early immunological effects following triclosan exposure were further evaluated following topical application in a murine model...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28121193/development-of-a-modified-lymphocyte-transformation-test-for-diagnosing-drug-induced-liver-injury-associated-with-an-adaptive-immune-response
#20
MULTICENTER STUDY
Jessica Whritenour, Mira Ko, Qing Zong, Jianying Wang, Karrie Tartaro, Patricia Schneider, Ellen Olson, Maria Van Volkenburg, Jose Serrano, Paul Hayashi, Robert Fontana, Naga Chalasani, Herbert L Bonkovsky
Drug-induced liver injury (DILI) is a growing problem. Diagnostic methods to differentiate DILI caused by an adaptive immune response from liver injury of other causes or to identify the responsible drug in patients receiving multiple drugs, herbals and/or dietary supplements (polypharmacy) have not yet been established. The lymphocyte transformation test (LTT) has been proposed as a diagnostic method to determine if a subject with an apparent hypersensitivity reaction has become sensitized to a specific drug...
December 2017: Journal of Immunotoxicology
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