urocanic acid/inflammation

Urocanic acid (UCA) derivatives were tested for their anti-inflammatory activity in inflammatory bowel disease (IBD) in two models: ex vivo and an experimental mouse model. Ex vivo: inflamed colonic tissue was incubated in culture medium with or without the UCA derivatives. Biopsies, incubated with

CD98 plays an important role in the development and progression of inflammation. Here, CD98 siRNA (siCD98) was complexed with urocanic acid-modified chitosan (UAC) to form nanoparticles (NPs), which were transfected into Raw 264.7 macrophages in an effort to convey anti-inflammatory effects.

BACKGROUND cis-Urocanic acid (cis-UCA) is an endogenous immunosuppressive molecule of the epidermis. OBJECTIVE We investigated the effects of topical cis-UCA creams (2·5% and 5%) in acute and subacute mouse models of skin inflammation. METHODS Acute skin irritation was induced by applying dimethyl

The aim was to study the effect of intravesically instilled cis-urocanic acid (cis-UCA) on bladder function in an experimental rat model of acute bladder inflammation. Hyaluronic acid (HA) was used as a comparator compound. Bladder irritation was induced in female rats by intravesical hydrochloric

OBJECTIVE Urocanic acid (UCA) absorbs ultraviolet (UV)B radiation in the epidermis which may interfere with phototherapy. Therefore, the influence of individual levels of UCA on immune reactivity and vitamin D synthesis induced by narrowband UVB radiation was assessed. METHODS Twenty-eight subjects

OBJECTIVE To evaluate the effects of cis-urocanic acid (cis-UCA) on mammary gland (MG) inflammation and injury associated with Escherichia coli-induced mastitis in dairy cows. METHODS 12 lactating dairy cows (36 MGs). METHODS At 7-week intervals, a different MG in each cow was experimentally

On exposure to sunlight, urocanic acid (UCA) in the skin is converted from trans to the cis form and distributed systemically where it confers systemic immunosuppression. The aim of this study was to determine if administration of cis-UCA would be effective in attenuating colitis and the possible

Hypoxia inducible factor-1α (HIF-1α), a ubiquitous inducible oxygen-sensing transcription factor, promotes cell survival under hypoxic conditions, including the early pre-angiogenic period of tumorigenesis, and is known to contribute to many malignancies. However HIF-1α can also be activated by

Early cellular and molecular events in inflamed skin include the active participation of epidermal keratinocytes (KCs) and dermal mast cells which can produce diffusible mediators such as tumor necrosis factor-alpha (TNF-alpha), histamine, and urocanic acid (UCA). Rapid induction of adhesion

Neutrophils play a fundamental role in the host innate immune response during mastitis and other bacterial-mediated diseases of cattle. One of the critical mechanisms by which neutrophils contribute to host innate immune defenses is through their ability to phagocytose and kill bacteria. The ability

Exposure to ultraviolet (UV) light impairs the function of inflammatory cells. Urocanic acid (UCA) in an stratum corneum has been suggested as a mediator in the immunosuppression of lymphoid cells detected after irradiation with UVB (UV wavelengths 280-320 nm). In this study, we examined the effects

Photoisomerization of trans-urocanic acid (UCA) in the stratum corneum has been implicated in the immunosuppression detected after irradiation with UVB (UV wavelength of 280-320 nm). In this study, cis-urocanic acid suppressed human monocyte production of TNF-alpha by a PGE2-dependent mechanism.

Previous studies using an antibody to cis-urocanic acid and mast-cell-depleted mice implicated both cis-urocanic acid and mast cells in the mechanisms by which ultraviolet B light suppresses systemic contact hypersensitivity responses in mice. In the absence of a direct stimulatory effect of