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Compounds · Other compounds

Revisiting: Melanocortin agonists: mechanism and the documented adverse profile

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Solved by a.vestergaard in post #8
Melanocortin agonists: mechanism involves the melanocortin-4 receptor pathway that regulates appetite. The documented adverse profile includes blood pressure elevation and erections of sustained duration, the second of which is specific enough that it is the first thing worth mentioning.

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NorringtonTL3Regular11 Sep 2024#1

Posting this under the heading it deserves: Revisiting: Melanocortin agonists: mechanism and the documented adverse profile Everything below is what sits behind that.

Comparing SURMOUNT-4 (JAMA, 2024) with STEP 4 (JAMA, 2021) and finding the comparison harder than it looks.

Different populations, different durations, different endpoints defined slightly differently, and in one case a different estimand. People compare the headline percentages anyway, including me until recently.

Is there a defensible way to put these side by side, or is the honest answer that there is not and we should stop?

0 likes 23mo
AT
a.teixeiraTL2 Moderator13 Sep 2024#2

On the opening post — agreed on the reasoning, with one qualification.

Sequence verification: for an obscure compound, a report of the amino acid sequence or a mass-spectrometry result confirming the mass is the only verification that actually matters. A supplier's certificate stating the name is not verification.

1 like 22mo
KB
k.brandl_deTL3Translator · DE14 Sep 2024#3

Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the kind that comes from remembering a figure instead of looking it up.

11 likes 22mo
AN
a.nascimentoTL2 Moderator15 Sep 2024#4

Compounds this community declines to help with, and why: there are specifics in the guidelines and they are not arbitrary. They exist because of failure modes that have happened in real people, not because of prudishness.

24 likes 22mo
DB
d.bramleyTL3Regular16 Sep 2024#5
a.teixeira, post #2: On the opening post — agreed on the reasoning, with one qualification. Sequence verification: for an obscure compound, a report of the amino acid sequence or a mass-spectrometry result confirming the mass is the only verification that actually matters. A supplier's certificate stating the name is not verification. Go to post

AOD-9604 is a fragment of human growth hormone and has been discussed as a potential weight-loss agent based on theoretical mechanism. The fragment hypothesis — that the fragment retains a specific property of the intact hormone — is not settled for this compound.

0 likes in reply to #2 22mo
AK
a.krastevTL2 Moderator17 Sep 2024 · edited#6
a.nascimento, post #4: Compounds this community declines to help with, and why: there are specifics in the guidelines and they are not arbitrary. They exist because of failure modes that have happened in real people, not because of prudishness. Go to post

Worth separating two things that post #2 runs together.

Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own records is not any individual result; it is that they are dated and consecutive.

0 likes in reply to #4 22mo
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GEldridgeTL3Regular18 Sep 2024#7

This follows post #4 rather than contradicting it.

How to research a compound with no human data: mechanistic plausibility is one input. Preclinical data is another. The honest position is that you are reasoning from theory, not from evidence, and the track record of such reasoning is unimpressive when tested against actual outcomes.

7 likes 22mo
AV
a.vestergaardTL2 Moderator Solution19 Sep 2024#8

Melanocortin agonists: mechanism involves the melanocortin-4 receptor pathway that regulates appetite. The documented adverse profile includes blood pressure elevation and erections of sustained duration, the second of which is specific enough that it is the first thing worth mentioning.

17 likes 22mo
PE
ppm_errorTL3Analytical chemist19 Sep 2024#9

For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use.

25 likes 22mo
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r.petrovTL2 Moderator20 Sep 2024#10

On post #6 — agreed on the reasoning, with one qualification.

Why catalogue breadth is not evidence of anything: a supplier listing 500 compounds does not make the 450 untested ones likely to work. It makes them untested compounds with supplier pages.

0 likes 22mo
ML
m.lehtinenTL2 Moderator21 Sep 2024#11

When "no data" is the complete and final answer: if there is no published human data on a compound, that is the state of knowledge. Hope is not a substitute and reasoning from theory is not a substitute. That is not a reason for shame; it is the honest epistemic position.

5 likes 22mo
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n.nybergTL2 Moderator22 Sep 2024#12
Norrington, post #1: Posting this under the heading it deserves: Revisiting: Melanocortin agonists: mechanism and the documented adverse profile Everything below is what sits behind that. Comparing SURMOUNT-4 ( JAMA , 2024) with STEP 4 ( JAMA , 2021) and finding the comparison harder than it looks. Different populations, different durations, different… Go to post

I disagree with the reply above, and I think the disagreement is substantive rather than terminological.

The distinction being drawn does not survive when you look at the published data for this specific question. I would be glad to be shown wrong on this, because the version I am arguing against is more convenient.

0 likes in reply to #1 22mo
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c.lundgrenTL222 Sep 2024#13
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r.restrepoTL2 Moderator23 Sep 2024#14

Reading a supplier's product description as a marketing document: that is exactly what it is. The hyperbole, the mechanism written as fact, the theoretical benefits stated as established benefits — all of that is marketing. Treat it as such and separate it from evidence where evidence exists.

20 likes 22mo
JF
j.fonsecaTL2 Moderator24 Sep 2024#15

Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own records is not any individual result; it is that they are dated and consecutive.

2 likes 22mo
DO
dr_okonkwoTL4 Moderator24 Sep 2024#16
Staff post. Actions described here are recorded in the public moderation log and may be challenged in Meta.

Distinguishing marketed research compounds from true chemical synthesis: some online suppliers sell compounds that are genuinely novel and difficult to obtain elsewhere. Others repackage standard compounds. Verifying what you are buying requires careful documentation review.

0 likes 22mo
FS
f.sjobergTL2 Moderator25 Sep 2024 · edited#17
n.nyberg, post #12: I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The distinction being drawn does not survive when you look at the published data for this specific question. I would be glad to be shown wrong on this, because the version I am arguing against is more convenient. Go to post

Worth separating two things that post #13 runs together.

Research-use-only status is a legal classification, not a safety classification. It means the compound is sold for laboratory use and not for human consumption or treatment. The label does not tell you whether the molecule is safe, efficacious, or what its effects are.

29 likes in reply to #12 22mo
CC
c.cardosoTL2 Moderator26 Sep 2024#18

post #17 is right about the mechanism and I think understates the practical bit.

How to research a compound with no human data: mechanistic plausibility is one input. Preclinical data is another. The honest position is that you are reasoning from theory, not from evidence, and the track record of such reasoning is unimpressive when tested against actual outcomes.

14 likes 22mo
CI
citation_indexTL2Member26 Sep 2024#19

Coming back to post #17, because the follow-up matters more than the original answer.

Why catalogue breadth is not evidence of anything: a supplier listing 500 compounds does not make the 450 untested ones likely to work. It makes them untested compounds with supplier pages.

14 likes 22mo
PF
p.fontaineTL2 Moderator27 Sep 2024#20
a.krastev, post #6: Worth separating two things that post #2 runs together. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own records is not any individual result; it is that they are dated and consecutive. Go to post

Picking up post #17: that is the part I would want checked first.

AOD-9604 is a fragment of human growth hormone and has been discussed as a potential weight-loss agent based on theoretical mechanism. The fragment hypothesis — that the fragment retains a specific property of the intact hormone — is not settled for this compound.

5 likes in reply to #6 22mo
LV
l.vukovicTL2 Moderator28 Sep 2024#21

I disagree with the reply above, and I think the disagreement is substantive rather than terminological.

The distinction being drawn does not survive when you look at the published data for this specific question. I would be glad to be shown wrong on this, because the version I am arguing against is more convenient.

7 likes 22mo
MH
m.haddadTL2Regular28 Sep 2024#22

Coming back to post #20, because the follow-up matters more than the original answer.

Sequence verification: for an obscure compound, a report of the amino acid sequence or a mass-spectrometry result confirming the mass is the only verification that actually matters. A supplier's certificate stating the name is not verification.

18 likes 22mo
SA
s.adebayoTL2 Moderator29 Sep 2024#23

post #22 answers the question as asked. The question underneath it is different.

Reading a supplier's product description as a marketing document: that is exactly what it is. The hyperbole, the mechanism written as fact, the theoretical benefits stated as established benefits — all of that is marketing. Treat it as such and separate it from evidence where evidence exists.

0 likes 22mo
WP
weekly_pinTL2Regular30 Sep 2024#24
m.lehtinen, post #11: When "no data" is the complete and final answer: if there is no published human data on a compound, that is the state of knowledge. Hope is not a substitute and reasoning from theory is not a substitute. That is not a reason for shame; it is the honest epistemic position. Go to post

Compounds this community declines to help with, and why: there are specifics in the guidelines and they are not arbitrary. They exist because of failure modes that have happened in real people, not because of prudishness.

1 like in reply to #11 22mo
HL
h.lindqvistTL2 Moderator30 Sep 2024#25

Naming conventions for research peptides cause confusion because suppliers do not follow a standard. The same compound gets different names from different suppliers. If you are researching something, confirming the sequence or mass is more reliable than confirming the name.

4 likes 22mo
FN
formulary_notesTL3Regular1 Oct 2024#26

When "no data" is the complete and final answer: if there is no published human data on a compound, that is the state of knowledge. Hope is not a substitute and reasoning from theory is not a substitute. That is not a reason for shame; it is the honest epistemic position.

12 likes 22mo
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r.ekstromTL21 Oct 2024#27
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TL4_HalvorsenTL4Leader · Journal club2 Oct 2024#28
r.petrov, post #10: On post #6 — agreed on the reasoning, with one qualification. Why catalogue breadth is not evidence of anything: a supplier listing 500 compounds does not make the 450 untested ones likely to work. It makes them untested compounds with supplier pages. Go to post

Worth separating two things that post #24 runs together.

This subcategory exists because some people will research compounds outside the main groups discussed here. The standard of evidence and honesty about its limits applies to everything discussed, not just to approved drugs.

0 likes in reply to #10 22mo
TD
t.dumitruTL2 Moderator3 Oct 2024#29

Picking up post #26: that is the part I would want checked first.

Distinguishing marketed research compounds from true chemical synthesis: some online suppliers sell compounds that are genuinely novel and difficult to obtain elsewhere. Others repackage standard compounds. Verifying what you are buying requires careful documentation review.

2 likes 22mo
EF
endo_fellow_rkTL3Endocrinology fellow3 Oct 2024#30

Research-use-only status is a legal classification, not a safety classification. It means the compound is sold for laboratory use and not for human consumption or treatment. The label does not tell you whether the molecule is safe, efficacious, or what its effects are.

8 likes 22mo