Stable expression of high affinity NK1 (substance P) and NK2 (neurokinin A) receptors but low affinity NK3 (neurokinin B) receptors in transfected CHO cells. 1992

U Gether, and T Marray, and T W Schwartz, and T E Johansen
Laboratory of Molecular Endocrinology, University Department of Clinical Chemistry, Copenhagen, Denmark.

Stable CHO cell clones which selectively express all three rat tachykinin receptors were established by transfection. The binding of radiolabled substance P and neurokinin A (substance K) to CHO clones expressing the NK1 and NK2 receptors, respectively, were saturatable and of high affinity (Kd = 0.17 nM (NK1); 3.4 nM (NK2)). Scatchard analysis of the binding data indicated for both receptors binding to a single population of binding sites, and competition binding studies showed that the binding specificities of the receptors corresponded to those of classical NK1 and NK2 receptors. In contrast, the binding of eledoisin to the NK3 receptor expressed in the transfected CHO cells was of low affinity (IC50 = 240 nM) compared to the high affinity of the receptor found when it was transiently expressed in COS-7 cells (IC50 = 8 nM). However, in both cases the receptor exhibited the specificity of a classical NK3 receptor. The established cell clones may provide an important tool for further analysis of the molecular mechanisms involved in binding, activation, and coupling of receptors for tachykinin peptides.

UI MeSH Term Description Entries
D002460 Cell Line Established cell cultures that have the potential to propagate indefinitely. Cell Lines,Line, Cell,Lines, Cell
D006224 Cricetinae A subfamily in the family MURIDAE, comprising the hamsters. Four of the more common genera are Cricetus, CRICETULUS; MESOCRICETUS; and PHODOPUS. Cricetus,Hamsters,Hamster
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D014162 Transfection The uptake of naked or purified DNA by CELLS, usually meaning the process as it occurs in eukaryotic cells. It is analogous to bacterial transformation (TRANSFORMATION, BACTERIAL) and both are routinely employed in GENE TRANSFER TECHNIQUES. Transfections
D015287 Neurokinin B A mammalian neuropeptide of 10 amino acids that belongs to the tachykinin family. It is similar in structure and action to SUBSTANCE P and NEUROKININ A with the ability to excite neurons, dilate blood vessels, and contract smooth muscles, such as those in the URINARY BLADDER and UTERUS. Neuromedin K,Neurokinin beta
D016466 CHO Cells CELL LINE derived from the ovary of the Chinese hamster, Cricetulus griseus (CRICETULUS). The species is a favorite for cytogenetic studies because of its small chromosome number. The cell line has provided model systems for the study of genetic alterations in cultured mammalian cells. CHO Cell,Cell, CHO,Cells, CHO
D017981 Receptors, Neurotransmitter Cell surface receptors that bind signalling molecules released by neurons and convert these signals into intracellular changes influencing the behavior of cells. Neurotransmitter is used here in its most general sense, including not only messengers that act to regulate ion channels, but also those which act on second messenger systems and those which may act at a distance from their release sites. Included are receptors for neuromodulators, neuroregulators, neuromediators, and neurohumors, whether or not located at synapses. Neurohumor Receptors,Neuromediator Receptors,Neuromodulator Receptors,Neuroregulator Receptors,Receptors, Neurohumor,Receptors, Synaptic,Synaptic Receptor,Synaptic Receptors,Neuromediator Receptor,Neuromodulator Receptor,Neuroregulator Receptor,Neurotransmitter Receptor,Receptors, Neuromediators,Receptors, Neuromodulators,Receptors, Neuroregulators,Receptors, Neurotransmitters,Neuromediators Receptors,Neuromodulators Receptors,Neuroregulators Receptors,Neurotransmitter Receptors,Neurotransmitters Receptors,Receptor, Neuromediator,Receptor, Neuromodulator,Receptor, Neuroregulator,Receptor, Neurotransmitter,Receptor, Synaptic,Receptors, Neuromediator,Receptors, Neuromodulator,Receptors, Neuroregulator
D018040 Receptors, Neurokinin-1 A class of cell surface receptors for TACHYKININS with a preference for SUBSTANCE P. Neurokinin-1 (NK-1) receptors have been cloned and are members of the G protein coupled receptor superfamily. They are found on many cell types including central and peripheral neurons, smooth muscle cells, acinar cells, endothelial cells, fibroblasts, and immune cells. NK-1 Receptors,Neurokinin-1 Receptors,Receptors, Substance P,SP-P Receptors,Substance P Receptors,NK-1 Receptor,Neurokinin-1 Receptor,Receptors, NK-1,Receptors, SP-P,SP-P Receptor,Substance P Receptor,Substance-P Receptor,Tachykinin Receptor 1,NK 1 Receptor,NK 1 Receptors,Neurokinin 1 Receptor,Neurokinin 1 Receptors,P Receptor, Substance,P Receptors, Substance,Receptor, NK-1,Receptor, Neurokinin-1,Receptor, SP-P,Receptor, Substance P,Receptor, Substance-P,Receptors, NK 1,Receptors, Neurokinin 1,Receptors, SP P,SP P Receptor,SP P Receptors
D018041 Receptors, Neurokinin-2 A class of cell surface receptors for tachykinins that prefers neurokinin A; (NKA, substance K, neurokinin alpha, neuromedin L), neuropeptide K; (NPK); or neuropeptide gamma over other tachykinins. Neurokinin-2 (NK-2) receptors have been cloned and are similar to other G-protein coupled receptors. NK-2 Receptors,Neurokinin A Receptors,Neurokinin-2 Receptors,Receptors, NK-2,Receptors, Substance K,SP-K Receptors,Substance K Receptors,NK-2 Receptor,NK-2 Receptor Site,Neurokinin-2 Receptor,SP-K Receptor,Substance K Receptor,NK 2 Receptor,NK 2 Receptor Site,NK 2 Receptors,Neurokinin 2 Receptor,Neurokinin 2 Receptors,Receptor Site, NK-2,Receptor, NK-2,Receptor, Neurokinin-2,Receptor, SP-K,Receptor, Substance K,Receptors, NK 2,Receptors, Neurokinin 2,Receptors, Neurokinin A,Receptors, SP-K,SP K Receptor,SP K Receptors
D018042 Receptors, Neurokinin-3 A class of cell surface receptors for tachykinins that prefers neurokinin B (neurokinin beta, neuromedin K) over other tachykinins. Neurokinin-3 (NK-3) receptors have been cloned and are members of the G-protein coupled receptor superfamily. They have been found in the central nervous system and in peripheral tissues. NK-3 Receptors,Neurokinin B Receptors,Neurokinin-3 Receptors,Receptors, NK-3,NK-3 Receptor,Neurokinin-3 Receptor,Neuromedin K Receptor,Receptors, Neuromedin K,B Receptors, Neurokinin,K Receptors, Neuromedin,NK 3 Receptor,NK 3 Receptors,Neurokinin 3 Receptor,Neurokinin 3 Receptors,Neuromedin K Receptors,Receptor, NK-3,Receptor, Neurokinin-3,Receptor, Neuromedin K,Receptors, NK 3,Receptors, Neurokinin 3,Receptors, Neurokinin B

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