title: Differential expression of IFN-gamma, IL-4, IL-10, and IL-1beta mRNAs in decalcified tissue sections of mouse lipopolysaccharide-induced periodontitis mandibles assessed by in situ hybridization.
abstract: To examine the role of T cell subgroups, Th1 and Th2, in the development of periodontitis, the expression of various cytokines was investigated in a mouse model of alveolar bone resorption using in situ hybridization (ISH) with digoxigenin-labeled oligonucleotides. When mice received repetitive injections with Escherichia coli lipopolysaccharide into the gingiva every 48 h, alveolar bone resorption was detectable after the fourth injection, reaching a maximum after the 13th injection. For the best performance of ISH, we first had to choose a decalcification protocol. Among various decalcification protocols, 10% EDTA (4 degrees C, 5-6 days) was the best for 28S rRNA staining. Positive cells for transcripts of interferon-gamma (Th1 product) were detected after the fourth injection, reaching a maximum after the tenth injection. A similar pattern was obtained for interleukin (IL)-10 mRNA (Th2 product) and IL-1beta, while the positive cell number reached a maximum after the 13th and 10th injections, respectively. The number of IL-4 mRNA (Th2 product)-positive cells remained low till the tenth injection, but increased thereafter. Consequently, we found that the population change from Th1 to Th2 in the inflammation site correlated with the transition from gingivitis to periodontitis, indicating differential roles of T cell subgroups in the development of periodontitis.
authors.affiliation: Department of Periodontology, Nagasaki University School of Dentistry, Sakamoto, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Iwasaki
authors.forename: Y
authors.initials: Y
authors.lastname: Hara
authors.forename: T
authors.initials: T
authors.lastname: Koji
authors.forename: Y
authors.initials: Y
authors.lastname: Shibata
authors.forename: P K
authors.initials: PK
authors.lastname: Nakane
authors.forename: I
authors.initials: I
authors.lastname: Kato
mesh_terms: D016301:Alveolar Bone Loss / Q000378:metabolism* / Q000473:pathology; D000818:Animals; D003649:Decalcification, Pathologic / Q000378:metabolism* / Q000473:pathology; D004076:Digoxigenin; D019286:Endopeptidase K / Q000378:metabolism; D015870:Gene Expression; D017403:In Situ Hybridization / Q000379:methods; D007371:Interferon-gamma / Q000235:genetics*; D007375:Interleukin-1 / Q000235:genetics*; D016753:Interleukin-10 / Q000235:genetics*; D015847:Interleukin-4 / Q000235:genetics*; D008070:Lipopolysaccharides / Q000494:pharmacology; D008297:Male; D008334:Mandible / Q000378:metabolism* / Q000473:pathology; D051379:Mice; D008807:Mice, Inbred BALB C; D008867:Microtomy; D016376:Oligonucleotides, Antisense; D010518:Periodontitis / Q000139:chemically induced / Q000378:metabolism* / Q000473:pathology; D012333:RNA, Messenger
chemical_list: D007375:Interleukin-1; D008070:Lipopolysaccharides; D016376:Oligonucleotides, Antisense; D012333:RNA, Messenger; D016753:Interleukin-10; D015847:Interleukin-4; D007371:Interferon-gamma; D019286:Endopeptidase K; D004076:Digoxigenin