Molecular biology of the gut

Naim, Hassan Y.; Zimmer, Klaus–Peter; Nichols, Buford L.

doi:10.1186/s40348-016-0059-1

Cited by 1 publication

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References 12 publications

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“…GO-analysis performed with the proteins after stimulation with osteoporosis positive sera or osteoporosis negative sera resulted in the GO-pathways: endocytosis, intracellular transport mechanisms as well as lipid metabolisms. Especially the endocytosis pathway was found to play a major role in inflammatory bowel diseases [52] , [53] . All identified pathways are involved in cytokine mediated changes in tight junction and adherent junction of intestinal cells [54] , although none of the identified proteins e.g.…”

Section: Discussionmentioning

confidence: 99%

Crohn’s disease patient serum changes protein expression in a human mesenchymal stem cell model in a linear relationship to patients’ disease stage and to bone mineral density

Blaschke

Koepp

Lenz

et al. 2018

Journal of Clinical & Translational Endocrinology

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BackgroundCrohn’s disease (CD) is associated with a higher prevalence of osteoporosis, a complication that is recognized as a significant cause of morbidity. Its pathogenesis is controversial, but the activity of CD is one contributing factor.MethodsWe stimulated SCP-1 cells (mesenchymal stem cell line) under osteogenic conditions with serum from adult patients with CD in the symptomatic phase (SP) and in remission (R) and with control sera. Concentrations of IL-6, IL-1 beta, and TNF alpha in the sera were measured. Patients were classified as normal or osteopenic/osteoporotic based on bone mineral density (BMD) T-score measurements. After 14 days in culture, protein expression and gene ontology (GO) annotation analysis was performed.ResultsCytokine concentrations (IL-6, IL-1 beta, TNF alpha) varied within sera groups. None of the cytokines were significantly increased in the symptomatic phase compared to remission. Protein analysis revealed 17 proteins regulated by the SP versus R phase sera of disease. A linear relationship between CDAI (Crohn’s disease activity index) and normalized protein expression of APOA1 and 2, TTR, CDKAL1 and TUBB6 could be determined. Eleven proteins were found to be differentially regulated comparing osteoporosis-positive and osteoporosis-negative sera. Gene annotation and further analysis identified these genes as part of heme and erythrocyte metabolism, as well as involved in hypoxia and in endocytosis. A significant linear relationship between bone mineral density and normalized protein expression could be determined for proteins FABP3 and TTR.ConclusionOur explorative results confirm our hypothesis that factors in serum from patients with CD change the protein expression pattern of human immortalized osteoblast like cells. We suggest, that these short time changes indeed influence factors of bone metabolism.

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Section: Discussionmentioning

confidence: 99%