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Updated: Mar 20, 2026

Proteomics to Identify Proteins Interacting with P2X2 Ligand-Gated Cation Channels
Published on: May 18, 2009
A critical look at the function of the P2Y11 receptor
Karin Dreisig1, Birgitte Rahbek Kornum2,3
1Molecular Sleep Laboratory, Department of Clinical Biochemistry, Rigshospitalet, Glostrup, Denmark.
Abstract:
The P2Y11 receptor is a member of the purinergic receptor family. It has been overlooked, somewhat due to the lack of a P2ry11 gene orthologue in the murine genome, which prevents the generation of knockout mice, which have been so helpful for defining the roles of other P2Y receptors. Furthermore, some of the studies reported to date have methodological shortcomings, making it difficult to determine the function of P2Y11 with certainty. In this review, we discuss the lack of a murine "P2Y11-like receptor" and highlight the limitations of the currently available methods used to investigate the P2Y11 receptor. These methods include protein recognition with antibodies that show very little specificity, gene expression studies that completely overlook the existence of a fusion transcript between the adjacent PPAN gene and P2RY11, and agonists/antagonists reported to be specific for the P2Y11 receptor but which have not been tested for activity on numerous other adenosine 5'-triphosphate (ATP)-binding receptors. We suggest a set of criteria for evaluating whether a dataset describes effects mediated by the P2Y11 receptor. Following these criteria, we conclude that the current evidence suggests a role for P2Y11 in immune activation with cell type-specific effects.
Insights
The P2Y11 receptor
Area of Science:
- Immunology and Pharmacology
Background:
- The P2Y11 receptor, a purinergic receptor, has been understudied due to the absence of a murine orthologue and methodological limitations.
- Existing research on P2Y11 function is hampered by non-specific antibodies, overlooked fusion transcripts, and inadequately tested agonists/antagonists.
Purpose of the Study:
- To review the challenges in P2Y11 receptor research.
- To propose criteria for robust P2Y11 functional studies.
Main Methods:
- Critically evaluating existing methodologies for P2Y11 investigation, including antibody specificity, gene expression analysis (considering fusion transcripts), and pharmacological agent validation.
- Developing a framework for assessing the validity of P2Y11-related experimental data.
Main Results:
- Current methods for studying the P2Y11 receptor are often unreliable.
- A lack of a murine knockout model and issues with experimental tools complicate P2Y11 research.
Conclusions:
- Rigorous criteria are needed to validate P2Y11 research findings.
- Despite limitations, current evidence points to P2Y11's role in cell-specific immune activation.
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