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- W2016778021 abstract "Aim of this study was to examine the dipeptide transport of β-Ala-Lys-N(ɛ)-AMCA in the human glioma cell line U373-MG and its potential regulation by diverse hormones and culture media. A mixed glial primary cell culture of the newborn rat served as reference cell system. β-Ala-Lys-N(ɛ)-AMCA (β-Ala-Lys-N(ɛ)-7-amino-4-methyl-coumarin-3-acetic acid) is a highly specific reporter substrate to investigate the dipeptide transport system PepT2. We were able to demonstrate that U373-MG cells express PepT2-mRNA and translocate β-Ala-Lys-N(ɛ)-AMCA via PepT2 into the cytoplasm. Previous results demonstrated that β-Ala-Lys-N(ɛ)-AMCA specifically accumulates in differentiated and dedifferentiated astrocytes but neither in differentiated nor dedifferentiated oligodendrocytes and in neurons. U373-MG cells were incubated with estradiol, testosterone, thyronine, dexamethasone, dibutyryl cyclic adenosine monophosphate and tetradecanoylphorbol acetate in order to detect potential substance-dependent changes in dipeptide uptake. There was no significant increase or decrease of β-Ala-Lys-N(ɛ)-AMCA-uptake after stimulation. Northern blot analyses confirmed that PepT2-mRNA is expressed in U373-MG and glial cells but showed no regulation of PepT2-mRNA expression in both cell types. Future investigations might offer the opportunity of an anti-tumor therapy with cytotoxic agents linked to a dipeptide-derivative such as β-Ala-Lys." @default.
- W2016778021 created "2016-06-24" @default.
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- W2016778021 date "2010-12-01" @default.
- W2016778021 modified "2023-10-01" @default.
- W2016778021 title "U373-MG cells express PepT2 and accumulate the fluorescently tagged dipeptide-derivative β-Ala-Lys-Nɛ-AMCA" @default.
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- W2016778021 doi "https://doi.org/10.1016/j.neulet.2010.09.046" @default.
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