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Erschienen in: Pediatric Surgery International 3/2020

01.03.2020 | Original Article

Calcium/calmodulin-dependent protein kinase IV signaling pathway is upregulated in experimental necrotizing enterocolitis

verfasst von: Mashriq Alganabi, Haitao Zhu, Joshua S. O’Connell, George Biouss, Andrea Zito, Bo Li, Edoardo Bindi, Agostino Pierro

Erschienen in: Pediatric Surgery International | Ausgabe 3/2020

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Abstract

Purpose

Activation of calcium/calmodulin-dependent protein kinase IV (CaMKIV) has been shown to increase intestinal injury and inhibit epithelial cell proliferation in dextran sulfate sodium (DSS)-induced colitis mice. However, the role of CaMKIV in necrotizing enterocolitis (NEC) is unknown. We aimed to study the expression and activation of CaMKIV in experimental NEC.

Methods

Following ethical approval, NEC (n = 10) was induced in C57BL/6 mouse pups by hypoxia, gavage hyperosmolar formula feeding and lipopolysaccharide from postnatal days P5 to 9. Breastfed pups served as control (n = 10). Mouse pups were sacrificed on P9 and the terminal ileum was harvested. Gene NEC injury was scored blindly by three independent investigators. CaMKIV, CREM and IL17 gene expression, and CaMKIV and pCaMKIV protein expression were assessed. The data were compared using Mann–Whitney U test. P < 0.05 was considered significant.

Results

Intestinal injury was induced in the NEC mice and confirmed by histological scoring and inflammatory cytokine IL6. CaMKIV and its downstream target genes of CREM and IL17 were significantly elevated in NEC mice relative to control. Similarly, phosphorylated-CaMKIV (pCaMKIV), the active form of CaMKIV, was more notably expressed in the NEC ileal tissue relative to control ileal tissue. Elevated pCaMKIV protein expression was also confirmed by western blot.

Conclusion

CaMKIV expression and activation are upregulated in experimental NEC suggesting a potential contributing factor in the pathogenesis of NEC.
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Metadaten
Titel
Calcium/calmodulin-dependent protein kinase IV signaling pathway is upregulated in experimental necrotizing enterocolitis
verfasst von
Mashriq Alganabi
Haitao Zhu
Joshua S. O’Connell
George Biouss
Andrea Zito
Bo Li
Edoardo Bindi
Agostino Pierro
Publikationsdatum
01.03.2020
Verlag
Springer Berlin Heidelberg
Erschienen in
Pediatric Surgery International / Ausgabe 3/2020
Print ISSN: 0179-0358
Elektronische ISSN: 1437-9813
DOI
https://doi.org/10.1007/s00383-019-04615-w

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