Gene Expression of Neurotrophins and Their High-Affinity Trk Receptors in Cultured Human Müller Cells
Hidehiro Oku, Tsunehiko Ikeda, Youichi Honma, Chie Sotozono, Kohji Nishida, Yo Nakamura, Teruyo Kida, Shigeru Kinoshita
Abstract
Hidehiro Oku, Tsunehiko Ikeda, Youichi Honma, Chie Sotozono, Kohji Nishida, Yo Nakamura, Teruyo Kida, Shigeru Kinoshita
Abstract
PURPOSE: To investigate the gene expression of nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), neurotrophin 3 (NT-3) and their high-affinity receptors (TrkA, TrkB and TrkC) in cultured human Müller cells. METHODS: The polymerase chain reaction was performed using specific primers for NGF, BDNF, NT-3, TrkA, TrkB and TrkC with complementary DNAs as the template, which were generated from poly-A+ RNA of cultured human Müller cells. RESULTS: We detected the precursor mRNA transcripts for NGF, BDNF, NT-3, TrkB and TrkC, but not TrkA. CONCLUSION: Human Müller cells can direct mRNA expressions of a number of neurotrophins which may have a neurotrophic function in the retina. An autocrine mode of action is suggested, since Müller cells not only synthesize neurotrophic factors, but also express their specific receptors.
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PURPOSE: To investigate the gene expression of nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), neurotrophin 3 (NT-3) and their high-affinity receptors (TrkA, TrkB and TrkC) in cultured human Müller cells. METHODS: The polymerase chain reaction was performed using specific primers for NGF, BDNF, NT-3, TrkA, TrkB and TrkC with complementary DNAs as the template, which were generated from poly-A+ RNA of cultured human Müller cells. RESULTS: We detected the precursor mRNA transcripts for NGF, BDNF, NT-3, TrkB and TrkC, but not TrkA. CONCLUSION: Human Müller cells can direct mRNA expressions of a number of neurotrophins which may have a neurotrophic function in the retina. An autocrine mode of action is suggested, since Müller cells not only synthesize neurotrophic factors, but also express their specific receptors.
Key concepts: Tropomyosin receptor kinase B, Tropomyosin receptor kinase A, Neurotrophin, Trk receptor, Tropomyosin receptor kinase C, Low-affinity nerve growth factor receptor, Nerve growth factor, Autocrine signalling