PMID- 11379889 OWN - NLM STAT- MEDLINE DCOM- 20010621 LR - 20170214 IS - 0022-0345 (Print) IS - 0022-0345 (Linking) VI - 80 IP - 3 DP - 2001 Mar TI - Mitogenic effects of neutrophins on a periodontal ligament cell line. PG - 881-6 AB - Nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), and neurotrophin-3 (NT-3) are three representative neurotrophins responsible for the differentiation and survival of neurons, and their high-affinity receptors are tropomyosin-receptor-kinase (TRK)A, TRKB, and TRKC, respectively. In this study, we investigated the expression of neurotrophins in a mouse periodontal ligament cell line (MPL), by reverse transcription-polymerase chain-reaction (RT-PCR) and enzyme-linked immunoabsorbent assay (ELISA). We also studied the expression of TRK receptors on MPL by immunostaining and the effects of neurotrophins on the proliferation of MPL, with a hypothesis of autocrine mechanism of neurotrophins. Each neurotrophin and TRK receptor was expressed, and neurotrophins enhanced the proliferation of MPL. These findings suggest that the MPL has functional neurotrophin receptors involved in an autocrine function of neurotrophins. The expression level of neurotrophins and TRKs showed the reverse pattern, and we propose an auto-regulatory mechanism of ligands and receptors in accordance with the level of synthesized neurotrophins. FAU - Tsuboi, Y AU - Tsuboi Y AD - Department of Orthodontics, Okayama University Dental School, Japan. FAU - Nakanishi, T AU - Nakanishi T FAU - Takano-Yamamoto, T AU - Takano-Yamamoto T FAU - Miyamoto, M AU - Miyamoto M FAU - Yamashiro, T AU - Yamashiro T FAU - Takigawa, M AU - Takigawa M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Dent Res JT - Journal of dental research JID - 0354343 RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (Coloring Agents) RN - 0 (Culture Media, Conditioned) RN - 0 (Mitogens) RN - 0 (Nerve Growth Factors) RN - 0 (Neurotrophin 3) RN - 0 (RNA, Messenger) RN - 9061-61-4 (Nerve Growth Factor) RN - EC 2.7.10.1 (Receptor, trkA) RN - EC 2.7.10.1 (Receptor, trkB) RN - EC 2.7.10.1 (Receptor, trkC) RN - EC 3.1.3.1 (Alkaline Phosphatase) SB - IM MH - Alkaline Phosphatase/analysis/genetics MH - Analysis of Variance MH - Animals MH - Autocrine Communication MH - Brain-Derived Neurotrophic Factor/analysis/genetics MH - Cell Differentiation/physiology MH - Cell Line MH - Cell Survival/physiology MH - Coloring Agents MH - Culture Media, Conditioned MH - Enzyme-Linked Immunosorbent Assay MH - Gene Expression Regulation MH - Mice MH - Mice, Inbred BALB C MH - Mitogens/*analysis/genetics MH - Nerve Growth Factor/analysis/genetics MH - Nerve Growth Factors/*analysis/genetics MH - Neurons/metabolism MH - Neurotrophin 3/analysis/genetics MH - Periodontal Ligament/cytology/*metabolism MH - RNA, Messenger/analysis/genetics MH - Receptor, trkA/analysis/genetics MH - Receptor, trkB/analysis/genetics MH - Receptor, trkC/analysis/genetics MH - Reverse Transcriptase Polymerase Chain Reaction MH - Statistics as Topic EDAT- 2001/05/31 10:00 MHDA- 2001/06/22 10:01 CRDT- 2001/05/31 10:00 PHST- 2001/05/31 10:00 [pubmed] PHST- 2001/06/22 10:01 [medline] PHST- 2001/05/31 10:00 [entrez] AID - 10.1177/00220345010800030701 [doi] PST - ppublish SO - J Dent Res. 2001 Mar;80(3):881-6. doi: 10.1177/00220345010800030701.