No abstract

Nonsteroidal anti-inflammatory drugs (NSAIDs) are commonly used in a wide variety of diseases due to their analgesic and anti-inflammatory effects, but their usage have been limited due to significant ulcerogenic side effects. In the present study, we aimed to evaluate the effect of α-lipoic acid (ALA) treatment on the anti-inflammatory activity of indomethacin (Indo) as well as the possible therapeutic effect of ALA on high dose Indo-induced gastropathy in female mice. Mice were treated with Indo (5 or 30 mg/kg, p.o) alone or in combination with ALA (50, 100 or 200 mg/kg, i.p). in vivo anti-inflammatory effect was evaluated by formalin-induced paw edema measured as paw thickness and edema. Gastric damage was evaluated macroscopically and histologically by scoring mucosal hemorrhage, erosion, edema and inflammation.

Novel aryl/alkyl azole derivative compounds C1 and C2 were screened for in vivo anti-nociceptive and anti-inflammatory activities by using the hot plate test and formalin-induced hind paw edema test, respectively. The ability of these compounds to inhibit cyclooxygenase-1/2 (COX-1/2) and 5/15-lipoxygenase (5/15-LOX) were evaluated in vitro by using a colorimetric method. C1 (30 and 50 mg/kg, i.p.) and C2 (3 and 30 mg/kg, i.p.) increased the latency to withdrawal in the hot plate test, indicating an anti-nociceptive activity. C1(30 and 50 mg/kg) and C2 (3,30 and 50 mg) were able to decrease formalin-induced edema, indicating their anti-inflammatory properties. C1 and C2 exhibited inhibitory effects on the activity of COX(1-2) and 15-LOX. However, neither C1 nor C2 showed an inhibitory effect on 5-LOX. This study demonstrates that C1 and C2 have anti-nociceptive and anti-inflammatory activities, that are partially mediated by inhibition of COX and LOX enzymes. Our results suggest that C1 and C2, novel aryl/alkyl azole compounds, could serve as lead compounds to develop novel therapeutic options for the treatment of pain and inflammation.

We aimed to investigate and compare the effects of rapid (NaHS) and slow (GYY4137 and AP39) hydrogen sulfide (H2S) releasing donors on LPS‐induced tracheal hyperreactivity and pro‐inflammatory cytokine levels in lung tissues of mice. Tissues were isolated from male BALB/c mice and incubated with LPS (10 µg/mL) in tissue culture. The subgroups were incubated with NaHS, GYY4137 and mitochondria‐targeted donor AP39. LPS incubation did not alter contraction response to carbachol, but enhanced 5‐HT and bradykinin‐induced contractions in tracheal rings, and elevated IL‐1β, IL‐6 and TNF‐α levels in lung homogenates. NaHS at 300 µmol/L and 1000 µmol/L, GYY4137 at 30 µmol/L and 100 µmol/L, and AP39 at 30 nmol/L concentrations inhibited the tracheal hyperreactivity to 5‐HT, whereas none of these donors affected the enhanced contraction to bradykinin. GYY4137 was also effective to inhibit 5‐HT hyperreactivity acutely. In lung tissues, NaHS prevented the elevation of IL‐1β level at 1000 μmol/L, and IL‐6 and TNF‐α levels at 100 μmol/L concentrations. Incubation with GYY4137 (100 µmol/L) and AP39 (30 nmol/L and 300 nmol/L) inhibited the increase in IL‐6 and TNF‐α levels, but not IL‐1β at concentrations that they affected tracheal hyperreactivity. These results indicate that H2S donors can decrease inflammation and prevent airway hyperreactivity.