Activation of NF-κB pathway in oral buccal mucosa during small intestinal ischemia-reperfusion injury

• Published in: The Journal of surgical research Vol. 179; no. 1; pp. 99 - 105
• Main Authors: Kim, Seong-Il, DDS, PhD, Kim, Young-Bin, DDS, MSD, Koh, Kwang-Moo, DDS, Youn, Yeo-Kyu, MD, PhD, Suh, Gil-Joon, MD, PhD, Cho, Eui-Sic, DDS, PhD, Leem, Dae-Ho, DDS, PhD, Baek, Jin-A., DDS, PhD, Shin, Hyo-Keun, DDS, PhD, Ko, Seung-O., DDS, PhD
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 2013
• Subjects: Animals; Buccal mucosa; Interleukin-6 - blood; Intestinal Mucosa - metabolism; Intestinal Mucosa - pathology; Intestine, Small - blood supply; Intestine, Small - metabolism; Intestine, Small - pathology; Ischemia-reperfusion injury; Male; Models, Animal; Mouth Mucosa - metabolism; Mouth Mucosa - pathology; NF-kappa B - metabolism; NF-κB pathway; Rats; Rats, Sprague-Dawley; Reperfusion Injury - metabolism; Reperfusion Injury - pathology; Reproducibility of Results; Severity of Illness Index; Signal Transduction - physiology; Small intestine; Surgery; Transcription Factor RelA - metabolism; Tumor Necrosis Factor-alpha - blood; Buccal mucosa; Ischemia-reperfusion injury; Small intestine; NF-κB pathway
• ISSN: 0022-4804; 1095-8673
• DOI: 10.1016/j.jss.2012.08.028

Abstract Background Intestinal ischemia-reperfusion injury induces intestinal mucosal barrier disruption, systemic inflammatory response syndrome, multiorgan failure, and death. The major pathway for the systemic inflammatory responses depends on nuclear factor kappa B (NF-κB). However, direct measuring of NF-κB in injured tissues is not routinely available. Our aim was to determine whether NF-кB pathway in buccal mucosa is activated during intestinal ischemia-reperfusion injury. Materials and methods Male Sprague-Dawley rats were prepared for the animal experiment. Superior mesenteric artery (SMA) was exposed and clamped for 30 min in the intestinal ischemia-reperfusion (IR) group. SMA was exposed only in control group. Serum, buccal mucosa, and small intestinal mucosa were harvested in 90 min after reperfusion in IR or 120 min after SMA exposure in control group. Serum cytokine levels and tissue NF-κB pathway activities were measured. Results Serum TNF-α (5.49 ± 2.72 versus 1.77 ± 1.20 pg/mL, P  = 0.002) and interleukin-6 (232.32 ± 29.98 versus 115.92 ± 17.81 pg/mL, P  = 0.002) levels were significantly higher in IR than control group. Intestinal mucosal cytoplasmic phosphorylated inhibitor kappa B (IκB)/IκB ratio, nuclear NF-κB expression, and NF-κB DNA-binding activity were significantly higher in IR than control group. Buccal mucosal cytoplasmic phosphorylated IκB/IκB ratio, nuclear NF-κB expression, and NF-κB DNA-binding activity were also higher in IR than control group. Conclusion Buccal mucosal NF-κB pathway was activated by intestinal ischemia-reperfusion injury. The present study suggests that buccal mucosal may be considered as an indicator for the assessment of intestinal ischemia-reperfusion injury.