Alterations of the Pancreatic Secretory Responses to Secretin and to the lonophore A23187 by Reserpine: A Calcium-Mediated Phenomenon?
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Bibliographic record
Abstract
This study was undertaken to further characterize the secretory response of the rat pancreas after reserpine treatment. Rats were given reserpine (1 mg kg-1 day-1 i.p.) or vehicle for 7 days. To distinguish between specific effects of reserpine and those related to secondary malnutrition caused by the drug, the secretory response of a group of pair-fed (PF) animals to reserpine was also investigated. Amylase release from dispersed pancreatic acini, prepared from control (C), PF and reserpine-treated (R) rats were used to evaluate functional secretory capacity. Reserpine and pair-feeding caused reduced responses of pancreatic acini to secretin. The pair-feeding-altered secretin response was greatly improved by increasing extracellular Ca2+ concentration, whereas a slight improvement was noticed in the R group. Reserpine significantly reduced the secretory response to the ionophore A23187 at concentrations above 5 x 10(-7) M in 1.25 mM Ca2+; in 2.5 mM Ca2+, the response to the ionophore was significantly higher in the R group than in C at all ionophore concentrations. Furthermore, at 2 x 10(-7) M ionophore, the secretory response to secretin in the R group became significantly higher than that in the C group but comparable to that of the control+ionophore. In conclusion, reserpine affects the secretory response to secretin as did pre-exposure of pancreatic acini to a high concentration of carbamylcholine. The modified secretory response to the ionophore following reserpine treatment indicates that reserpine may act as a 'Ca2+ entry mechanism' antagonist which may explain the partial reduction in the secretin response.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 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 it