Acid Sirius staining of rat gastric tissue. Panel A represents the light photomicrographs of gastric tissue sections of various groups (n = 6): (CON) – Control rats, (ADR 0.3) - only adrenaline treated rats at 0.3 mg/kg bw, (OA2.5,OA5,OA10,OA20) – only oleic acid fed rats at the doses of 2.5,5,10 and 20 mg/kg bw respectively & (ADR 0.3 + OA 2.5, ADR 0.3 + OA5, ADR 0.3 + OA10 and ADR 0.3 + OA20) – Oleic acid fed at the doses of 2.5,5,10 and 20 mg/kg bw respectively and then adrenaline treated rats at 0.3 mg/kg bw. Panel B represents the images of rat gastric tissue sections in the order mentioned above as captured by the red filter of confocal microscope. Figure C represents collagen intensity of rat gastric tissue of different experimental groups. Loss of collagen content in the gastric tissue was observed in ADR0.3 group as compared to control. Pre-treatment of rats with oleic acid at a dose of 10 mg/kg body weight (ADR0.3 + OA 10) protected significantly against the loss of collagen content(∗p < 0.001 vs. control; #p < 0.001 vs. adrenaline treated).