title: [The effects of tensile strain and loading time on the secretion of IL-1 beta of human PDLF].
abstract: This study aims at exploring the effects of tensile strain and loading time on the secretion of IL-1 beta of human periodontal ligament fibroblast. Five tensile strain values including 0%, 8%, 12%, 16%, 20% and three loading time including 24 h, 48 h, 72 h are set in this study. The prepared cell samples are mounted on the self-devised loading apparatus in vitro. The content of IL-1 beta in each sample was determined using double-antibody ELISA. The secretion amount of IL-1 beta per day is directly proportional to the loading time and tensile strain value in tensile strain group of 8%, 12%, 16%. The secretion amount of IL-1 beta reaches its maximum at tensile strain value of 16% in loading time groups. Loaded strain for 24 h and 48 h, the secretion amount of IL-1 beta at tensile strain value of 20% is obviously more than that at value of 0%, but the amount already begin to decrease apparently. Loaded strain for 72 h, the secretion amount of IL-1 beta decreases to a great extent that it is less than the amount at strain value of 0%. The tensile strain stimulates the secretion of IL-1 beta by human periodontal ligament fibroblast when the strain is under normal physiological extent, but the stimulation effect fades out as time goes on.
authors.affiliation: Department of Prosthodontics, West China College of Stomatology, Sichuan University, Chengdu 610041.
authors.forename: Xinmin
authors.initials: X
authors.lastname: Chen
authors.forename: Jun
authors.initials: J
authors.lastname: Hu
authors.forename: Fuming
authors.initials: F
authors.lastname: He
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Ma
authors.forename: Junhua
authors.initials: J
authors.lastname: Wu
authors.forename: Xiuhua
authors.initials: X
authors.lastname: Zhang
mesh_terms: D002478:Cells, Cultured; D005347:Fibroblasts / Q000378:metabolism; D006801:Humans; D007375:Interleukin-1 / Q000378:metabolism*; D010513:Periodontal Ligament / Q000166:cytology / Q000378:metabolism*; D013718:Tensile Strength; D013997:Time Factors
chemical_list: D007375:Interleukin-1