Abstract 118: P2X7 Receptor Contributes To Angiotensin II-induced Hypertension, Vascular Injury And Cd8 <sup>+</sup> T Cell Activation
Bibliographic record
Abstract
Introduction: Innate and adaptive immune cells contribute to hypertension and end-organ damage. High blood pressure (BP) causes cardiovascular injury and the release of damage-associated molecule patterns such as adenosine triphosphate (ATP). ATP can bind to the purinergic receptor P2X7 (P2RX7) on innate immune cells triggering interleukin-1β release, which drives further immune activation. Hypothesis: We hypothesized that P2rx7 knockout or P2RX7 antagonism would blunt angiotensin II (AngII)-induced BP elevation and cardiovascular injury through decreased immune activation. Methods: Ten-to-12-week-old male C57BL/6J wild-type (WT) and P2rx7 -/- mice were infused or not with AngII (1000 ng/kg/min) for 14 days. A second group of AngII-infused WT mice was also infused with the P2RX7 antagonist AZ10606120 (694 ng/kg/min) or vehicle. BP was determined by telemetry, plasma ATP using a bioluminescence assay, mesenteric artery function using pressurized myography, cardiac left ventricle (LV) function and mass by ultrasound and activated immune T cell infiltration in aortic perivascular adipose tissue (PVAT) by flow cytometry. Results: AngII increased plasma ATP in WT mice (4.4±1.2 vs 2.0±0.9 μM, P <0.05). AngII-induced systolic BP elevation was reduced by P2rx7 deficiency (164±3 vs 176±2 mm Hg, P <0.05) or P2RX7 antagonism (143±5 vs 170±5 mm Hg, P <0.01). AngII decreased LV fractional shortening (FS, 32.5±3.1% vs 43.8±2.4%, P <0.05) and increased LV mass/body weight (BW) in WT mice (LVmass/BW, 6.3±0.2 vs 4.2±0.2 mg/g, P <0.001), which were exaggerated in P2rx7 -/- (FS: 20.2±3.1% and LVmass/BW: 7.2±0.5 mg/g, P <0.05), but not in mice receiving AZ10606120. AngII reduced the dilatation response of mesenteric arteries to acetylcholine in WT (61±7 vs 83±4%, P <0.05), but not in P2rx7 -/- or AZ10606120-treated mice. AngII increased CD69 + CD8 + T cell infiltration in aortic PVAT of WT (60±16 vs 16±3 cells/aortic PVAT, P <0.001), but not in P2rx7 -/- or AZ10606120-treated mice. Conclusion: P2rx7 knockout or antagonism attenuates AngII-induced BP elevation, vascular injury, and infiltration of activated CD8 + T cells into aortic PVAT. P2rx7 knockout exacerbated AngII-induced cardiac dysfunction and hypertrophy, whereas P2RX7 antagonism did not.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".