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c/glp1science·posted 1 year ago by u/employer_carveout

[Discussion] the pharmacology advice in here is 3 years out of date

Discussion Cold Box ×3 Long Haul ×1 Receipts ×2

the pharmacology advice in here is 3 years out of date, and I am aware this is a minority view on this board.

3 years. Those are measured, not estimated, and not rounded up in my favour.

The half-life explanation was the thing that made weekly dosing intuitive for me rather than arbitrary.

Tried to build a mental model from mechanism alone and produced a confident prediction that the trial data flatly contradicted.

Tell me where this is wrong. That is the useful part of posting it.

5,995 up / 2,162 down73% upvoted44 commentsid 1s6f1z13 Apr 2025

44 comments

11 in this archive, depth 5

best — the order this archive was captured in

u/aleksi_eriksen532 points·1 year ago

Receptor expression in a tissue is necessary but not sufficient for an effect. You also need the agonist to reach it at relevant exposure, and that is where a lot of confident mechanism talk falls down.

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u/camila_kowalski129 points·1 year ago

glucagon agonism sounds paradoxical until you read the energy expenditure work

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u/tomas_broberg364 points·1 year ago

Not convinced by the linearity assumption. Dose-response in this class is not linear and the trials show it.

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u/sig_figs_samMOD332 points·1 year ago

Speculation is welcome here if it is labelled. This one has been relabelled rather than removed.

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u/camila_kowalski112 points·1 year ago

Speculation is welcome here if it is labelled.

sig_figs_sam is right that mechanism gives direction and not magnitude. Worth pinning.

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[removed]52 points·1 year ago

[removed by moderator]

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u/georgi_chowdhury27 points·1 year ago·edited

Push back: a receptor being expressed in a tissue does not tell you the agonist reaches it at therapeutic exposure.

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u/tomas_broberg0 points·1 year ago

Speculation is welcome here if it is labelled.

Adding the caveat the paper itself makes in its limitations section, which is stronger than anything in this thread.

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u/isabela_nilsen572 points·1 year ago

Went looking for human data on a mechanism everybody here asserts. Found preclinical work and one small study. That was clarifying.

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u/devils_advocate_d188 points·1 year ago

That study was in a rodent model. Worth stating, since the thread has been reading it as human data.

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u/aleksi_lehtinen126 points·1 year ago

Yes. The central component is the one that explains the reports on this site better than gastric emptying does.

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About c/glp1science

The mechanism layer: incretin physiology, receptor distribution, gastric emptying, central appetite signalling, glucagon-receptor contribution, amylin co-agonism, and the pharmacokinetics that make weekly dosing possible. Papers get cited by journal and year or they get a [needs source] reply.

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