Prevention of lipopolysaccharide-induced intussusception in mice by the COX2 inhibitor rofecoxib

Significance of MCP-1 in predicting the short-term recurrence of primary intussusception in children: An observational study

To evaluate the relationship between the expression level of (MCP-1) in peripheral blood and the short-term recurrence of primary intussusception in children, a retrospective analysis of children with primary intussusception under ultrasound-guided hydrostatic reduction in our hospital from June 2019 to June 2021, a total of 412 cases, 37 cases of short-term recurrence. Enzyme-linked immunosorbent assay was used to detect the expression of MCP-1 in peripheral venous blood; receiver operating curve (ROC) was utilized to evaluate the diagnostic efficacy of MCP-1 in predicting short-term recurrence; logistic regression analysis of risk factors for recurrence. MCP-1 increased in the peripheral blood of children with short-term recurrence (P < .05). Logistic regression analysis found that increased MCP-1 was a risk factor for recurrence; ROC showed that 23.24 ng/mL was used as a cut-off value. The sensitivity of MCP-1 for predicting the recurrence of intussusception in children is 82.14%, and the specificity is 75.67%. In primary intussusception, the expression of MCP-1 in the peripheral blood of children with short-term recurrence is raised. Elevated expression of MCP-1 is a risk factor for predicting short-term intussusception recurrence and has certain clinical significance.

Role of innate immunity and altered intestinal motility in LPS- and MnCl2-induced intestinal intussusception in mice

Intestinal intussusception (ISS) commonly causes intestinal obstruction in children. One mechanism that has been proposed to cause ISS is inflammation-induced alteration of intestinal motility. We investigated whether innate inflammatory factors or altered motility is required for induction of ISS by LPS. We compared rates of ISS among BALB/c and C57BL/6 mice, mice lacking lymphocytes or depleted of phagocytes, or mice with defects in the Toll-like receptor 4 (TLR4) signaling pathway following administration of LPS or the Ca(2+) analog MnCl2. At 6 or 2 h after administration of LPS or MnCl2, respectively, mice underwent image analysis to assess intestinal contraction rate or laparotomy to identify ISS. LPS-induced ISS (LPS-ISS) was observed in BALB/c mice, but not in C57BL/6 mice or any BALB/c mice with disruptions of TLR4 signaling. LPS-induced serum TNF-α, IL-6, and nitric oxide (NO) and intestinal NO levels were similar in BALB/c and C57BL/6 mice. The rate of LPS-ISS was significantly reduced in phagocyte-depleted, but not lymphocyte-deficient, mice. Intestinal contraction rates were reduced in LPS-ISS-susceptible BALB/c mice, but not in LPS-ISS-resistant C57BL/6 or TLR4 mutant mice, suggesting a role for reduced intestinal contraction rate in LPS-ISS susceptibility. This was tested with MnCl2, a Ca(2+) antagonist that reduced intestinal contraction rates and induced ISS, irrespective of mouse strain. Therefore, LPS-ISS is initiated by innate immune signaling that requires TLR4 and phagocytes but may be independent of TNF-α, IL-6, and NO levels. Furthermore, alteration of intestinal motility, specifically, reduced intestinal contraction rate, is a key factor in the development of ISS.

Postoperative intussusception in infants and children: a report of seven cases

Postoperative intussusception is an uncommon but serious condition in infants and children. Here, we report seven cases of postoperative intussusception in infants and children who were seen at our institution over the last 13 y. The patients showed increased nasogastric drainage, vomiting, lack of stool, and/or growing abdominal distension 2 to 9 d following abdominal surgery. Manual reduction was successful in five cases. In two cases, necrosis was found and intestinal resection and anastomosis were carried out. No recurrence was observed at six months of follow-up. Postoperative intussusception should be suspected in pediatric surgical patients who showed signs of intestinal obstruction in the early postoperative period.

Compound colonic intussusception: a reason for failure of pneumatic reduction

Intussusception is the most common cause of bowel obstruction in infants older than 3 months. The authors report a case of idiopathic compound (ileocolic/colocolic) intussusception in a 5-month-old girl that was resistant to nonsurgical pneumatic (enema) reduction and necessitated open surgery. Compound intussusception is extremely rare but represents a form of intussusception that is likely to be aggravated by attempts at pneumatic reduction with obvious dangers for the unwary. The literature is reviewed, and the terminology was discussed.