The Study
Biased constitutive signaling of the G protein-coupled receptor GPR35 suppresses gut barrier permeability
This study is like watching a robot’s parts move inside a test tube and seeing that when one part turns on, the wall between two rooms gets tighter. It doesn’t prove that fixing this robot in people will cure disease—it just shows how it might work in a lab.
Analysis score
Maximum 58 for a case-control study.
Where the score came from
Your gut has a tiny molecular switch called GPR35 that’s always slightly turned on—even without any signal. This constant low hum helps keep the gut lining tight so nothing leaks out. If you turn it off, the lining gets leaky.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 548 / 100
Quality score
Researchers compare people who have a condition (cases) with similar people who do not (controls), looking back in time for differences in exposure. Useful but more prone to bias.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes—this means blocking this natural switch could worsen gut inflammation in diseases like ulcerative colitis, while activating it might help heal the gut.
- 2The drug CID-2745687 made gut barrier permeability increase by over 50% in humanized mice (p < 0.01), but had no effect in mice without GPR35.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
The Journal of Biological Chemistry
Year
2024
Authors
Tezz Quon, Li-Chiung Lin, Amlan Ganguly, B. Hudson, Andrew B. Tobin, G. Milligan
Related Content
Claims (6)
The GPR35 protein, when active without external triggers, consistently turns on Gα12 and Gα13 signaling proteins but not Gαo, Gq, or G11, and this pattern is the same in both versions of the human GPR35 protein found in human cells.
The GPR35 receptor only interacts with β-arrestin-2 when a specific activating molecule is present; without that molecule, no interaction occurs, and the receptor does not signal through arrestin pathways under normal conditions.
Autoimmune thyroid disease occurs only when genetic predisposition, environmental triggers, and increased intestinal permeability are all present together.
The GPR35 receptor, when active without external stimulation, lowers the permeability of the intestinal barrier in human cells and genetically modified mice expressing the human version of this receptor.
When GPR35 is present in high amounts, it continuously activates Gα12 and Gα13 proteins, making it impossible to detect signals triggered by other molecules. When GPR35 is present in low amounts, signals from those other molecules can be detected.
CID-2745687 increases the permeability of the colon lining in cells that express the GPR35 protein, but does not increase permeability in cells that lack the GPR35 protein.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.