2019
DOI: 10.5051/jpis.2019.49.5.270
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Vitamin D maintains E-cadherin intercellular junctions by downregulating MMP-9 production in human gingival keratinocytes treated by TNF-α

Abstract: Purpose: Despite the well-known anti-inflammatory effects of vitamin D in periodontal health, its mechanism has not been fully elucidated. In the present study, the effect of vitamin D on strengthening E-cadherin junctions (ECJs) was explored in human gingival keratinocytes (HGKs). ECJs are the major type of intercellular junction within the junctional epithelium, where loose intercellular junctions develop and microbial invasion primarily occurs. Methods: HOK-16B cells, an immortalized normal human gingival c… Show more

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Cited by 29 publications
(26 citation statements)
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“…Confirming the data of Oh et al [51], which showed that vitamin D downregulates MMP9 production in the presence of hypovitaminosis by blocking NFkB pathway activation, the increase of MMP9 in our PD patients is plausible. In relation to disease stage, MMP9 followed an increase (p < 0.05) in the presence of increased periodontal pocket depth, favoring tooth loss and the establishment of chronic inflammation [52].…”
Section: Discussionsupporting
confidence: 92%
“…Confirming the data of Oh et al [51], which showed that vitamin D downregulates MMP9 production in the presence of hypovitaminosis by blocking NFkB pathway activation, the increase of MMP9 in our PD patients is plausible. In relation to disease stage, MMP9 followed an increase (p < 0.05) in the presence of increased periodontal pocket depth, favoring tooth loss and the establishment of chronic inflammation [52].…”
Section: Discussionsupporting
confidence: 92%
“…Others supported the idea that patients with higher levels of vitamin D were related to less bleeding on probing (BoP) comparing to patients with lower levels [ 34 ]. In addition, in vitro studies demonstrated that vitamin D may decrease the number of Porphyromonas gingivalis through active autophagy [ 37 ] and might decrease the inflammatory burden of periodontitis in rodent models [ 38 , 39 , 40 , 41 ]. Furthermore, the association between vitamin D levels and periodontitis has been systematically investigated [ 42 , 43 , 44 , 45 ]; however, none of these studies were able to produce quantitative synthesis.…”
Section: Introductionmentioning
confidence: 99%
“…In human bronchial epithelial cells (A549), vitamin D increased the expression of E-cadherin and thereby induced differentiation [ 31 ]. In gingival keratinocytes, vitamin D improved intercellular junctions by increasing E-cadherin expression [ 32 ]. The loss of VDR was associated with reduced expression of E-cadherin and epithelial cell differentiation in chronic kidney disease [ 33 ].…”
Section: Discussionmentioning
confidence: 99%
“…Primary bronchial epithelial were isolated and characterized as described earlier [ 32 ]. Endo-bronchial tissue biopsies were obtained from six patients by endo-bronchoscopy for diagnostic reasons by the lung clinic (University Hospital Basel, Switzerland).…”
Section: Methodsmentioning
confidence: 99%