6533b82afe1ef96bd128cc1e
RESEARCH PRODUCT
Regulation of Autophagic Signaling by Mechanical Loading and Inflammation in Human PDL Fibroblasts
Kim BlawatAlexandra MayrChristian KirschneckAndreas JägerJames DeschnerSvenja MemmertMiriam HardtChristian BehlMarjan Nokhbehsaimsubject
0301 basic medicineProgrammed cell deathautophagyInflammationCatalysisArticlelcsh:ChemistryInorganic Chemistry03 medical and health sciences0302 clinical medicineinflammatory conditionsmedicineHumansProtein phosphorylationPhysical and Theoretical Chemistrylcsh:QH301-705.5Molecular BiologySpectroscopyPI3K/AKT/mTOR pathwayCells CulturedInflammationCell DeathCell growthChemistryOrganic ChemistryAutophagymechanical stress030206 dentistryGeneral MedicineFibroblastsComputer Science ApplicationsCell biologyorthodontic tooth movement030104 developmental biologylcsh:Biology (General)lcsh:QD1-999mammalian target of rapamycin (mTOR) signaling pathwayPhosphorylationStress Mechanicalmedicine.symptomSignal transductionSignal Transductiondescription
Autophagy (cellular self-consumption) is a crucial adaptation mechanism during cellular stress conditions. This study aimed to examine how this important process is regulated in human periodontal ligament (PDL) fibroblasts by mechanical and inflammatory stress conditions and whether the mammalian target of rapamycin (mTOR) signaling pathway is involved. Autophagy was quantified by flow cytometry. Qualitative protein phosphorylation profiling of the mTOR pathway was carried out. Effects of mTOR regulation were assessed by quantification of important synthesis product collagen 1, cell proliferation and cell death with real-time PCR and flow cytometry. Autophagy as a response to mechanical or inflammatory treatment in PDL fibroblasts was dose and time dependent. In general, autophagy was induced by stress stimulation. Phosphorylation analysis of mTOR showed regulatory influences of mechanical and inflammatory stimulation on crucial target proteins. Regulation of mTOR was also detectable via changes in protein synthesis and cell proliferation. Physiological pressure had cell-protective effects (p = 0.025), whereas overload increased cell death (p = 0.003), which was also promoted in long-term inflammatory treatment (p <
year | journal | country | edition | language |
---|---|---|---|---|
2020-12-01 | International Journal of Molecular Sciences |