ArticleNaunyn-Schmiedeberg's archives of pharmacology2004
ATP priming of macrophage-derived chemokine responses in CHO cells expressing the CCR4 receptor.
Article in Naunyn-Schmiedeberg's archives of pharmacology, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
5 citing papers in PubMed, 12 citations in OpenAlex.
- Purinergic Receptors Crosstalk with CCR5 to Amplify CaCellular and molecular neurobiology · 2021Article
- Identification of the C3a receptor (C3AR1) as the target of the VGF-derived peptide TLQP-21 in rodent cells.The Journal of biological chemistry · 2013Article
- Elusive equilibrium: the challenge of interpreting receptor pharmacology using calcium assays.British journal of pharmacology · 2010Review
- Antagonist selective modulation of adenosine A1 and A3 receptor pharmacology by the food dye Brilliant Black BN: evidence for allosteric interactions.Molecular pharmacology · 2010Article
- Translocation of arrestin induced by human A(3) adenosine receptor ligands in an engineered cell line: comparison with G protein-dependent pathways.Pharmacological research · 2008Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The mechanism by which ATP primes for subsequent macrophage-derived chemokine (MDC) mediated intracellular calcium (Ca2+(i)) responses at the human CCR4 receptor stably expressed in Chinese hamster ovary (CHO) cells was investigated. MDC alone was unable to elicit a Ca2+(i) response, but pre-stimulation of cells with ATP enabled a subsequent MDC-mediated Ca2+(i) response with a pEC50 of 8.66+/-0.16. The maximal response elicited by MDC was dependent upon the concentration of ATP used to prime, but the pEC50 was stable at all ATP concentrations tested. Pertussis toxin pre-treatment did not effect the ATP response, but abolished that to MDC, demonstrating that priming with ATP did not alter G protein-coupling specificity of the CCR4 receptor. Ionomycin and thapsigargin both increased Ca2+(i) concentrations (pEC50s of 7.59+/-0.57 and 6.81+/-0.31 respectively), but were unable to prime for MDC responses, suggesting the priming mechanism was not dependent upon increases in Ca2+(i) concentrations. Priming of the MDC response was still observed when experiments were performed with low Ca2+(e) (70 microM), indicating that Ca2+ influx was not required for ATP to prime the CCR4 receptor. Neither Ro31-8220 nor wortmannin affected priming, suggesting that protein kinase C and phosphoinositol 3-kinase were not involved. In conclusion, pre-stimulation of endogenous P2Y receptors with ATP facilitates Ca2+ signalling at the recombinant CCR4 receptor in CHO cells, although the mechanism by which this occurs remains to be defined.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.