Background. Inflammatory bowel diseases — Crohn’s disease and ulcerative colitis are chronic gastrointestinal affecting young people of working age. An alternative to basic therapy (5-aminosalicylic acid) for inflammatory is the use ozone, which has anti-inflammatory, immunomodulatory, antibacterial properties no side effects in therapeutic concentrations. Objective. To perform clinical morphol...

BACKGROUND Vulvodynia is a remarkably prevalent chronic pain condition of unknown etiology. Epidemiologic studies associate the risk of vulvodynia with a history of atopic disease. We used an established model of hapten-driven contact hypersensitivity to investigate the underlying mechanisms of allergy-provoked prolonged sensitivity to pressure. METHODS We sensitized female ND4 Swiss mice to ...

The relative roles of CD4+ and CD8+ T cells in contact hypersensitivity responses have not been fully solved, and remain an important question. Using an adoptive transfer model, we investigated the role of the respective T cell subset. Magnetic bead separated CD4+ and CD8+ T cells from oxazolone sensitized C57BL/6 mice were transferred into RAG-/- mice, followed by hapten challenge and analysis...

Patients with prolonged ulcerative colitis (UC) frequently develop colorectal adenocarcinoma for reasons that are not fully clear. To analyze inflammation-associated colonic tumorigenesis, we developed a chronic form of oxazolone-induced colitis in mice that, similar to UC, was distinguished by the presence of IL-13-producing NKT cells. In this model, the induction of tumors using azoxymethane ...

The inflammasomes induce maturation of pro-interleukin-1β (IL-1β) and pro-IL-18. We investigated roles of the NLRP3 inflammasome in the pathogenesis of ulcerative colitis (UC). After induction of oxazolone-induced colitis, a mouse UC model, colonic tissues were assayed for inflammatory mediators. Histological studies were performed on inflamed colonic tissue from mice and UC patients. Histologi...

The b2 structures of model systems Xxx-Flp-Ala (Flp = 4R-fluoroproline) and Xxx-flp-Ala (flp = 4S-fluoroproline) (where Xxx is Val or Tyr) were studied by action IRMPD spectroscopy. Proline ring substitutions influence the trans/cis isomerization of the precursor ion, resulting in different b2 fragment ion structures by collision induced dissociation. Vibrational spectra of the b2 ions of Val-F...

Immune contact dermatitis is an inflammation of the skin resulting from exposure to allergens in the environment. The aim of this study was to compare the actions of lactoferrin (LF), a natural immunomodulator, on the elicitation phases of the cellular and humoral, cutaneous immune responses to oxazolone and toluene diisocyanate (TDI), respectively. LF was given i.v. in a 10 mg/mouse dose, toge...

Skin protects the body from the environment and is an important component of the innate and adaptive immune systems. Atopic dermatitis and contact dermatitis are among the most frequent inflammatory skin diseases and are both determined by multigenic predisposition, environmental factors, and aberrant immune response. Peptidoglycan Recognition Proteins (Pglyrps) are expressed in the skin and we...

Multiple effects of ozone are a prerequisite for its use in the complex therapy inflammatory bowel diseases. Our aim was to analyze and 5-aminosalicylic acid (5-ASA) oxazolone-induced colitis (OIC) upon innate immunity functions.
 OIC modeled 72 male Wistar rats weighing 24020 g by two-stage application oxazolone solution. Ozone at dose 0.05 mg/kg, as part ozone-oxygen mixture, injected in...

Charge-directed fragmentation has been shown to be the prevalent dissociation step for protonated peptides under the low-energy activation (eV) regime. Thus, the determination of the ion structure and, in particular, the characterization of the protonation site(s) of peptides and their fragments is a key approach to substantiate and refine peptide fragmentation mechanisms. Here we report on the...