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Compound class

Regulatory peptide fragment analogs

Short synthetic peptides constructed from a fragment of a larger endogenous regulatory peptide, commonly extended with a stabilizing C-terminal sequence.

Published: 2026-09-04Literature/identifier verification: 2026-08-23

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Neutral class definition

Short synthetic peptides constructed from a fragment of a larger endogenous regulatory peptide, commonly extended with a stabilizing C-terminal sequence.

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Related compounds

Compound

AOD-9604

AOD-9604 is a synthetic, sixteen-residue human GH1 fragment analog specified with an N-terminal tyrosine, free termini and one intramolecular disulfide. AOD-9604 is used here as a provisional development-code name; an INN or USAN has not been established for this record.

Tyr-hGH(177-191) · AOD9604

Compound

N-Acetyl Selank Amidate

N-Acetyl Selank Amidate is the Selank heptapeptide with an acetyl group on the N-terminal threonine residue and an amide at the C-terminal proline. These covalent terminal changes define a distinct molecule.

Compound

N-Acetyl Semax Amidate

N-Acetyl Semax Amidate is the Semax heptapeptide with an acetyl group on the N-terminal methionine residue and an amide at the C-terminal proline. These covalent terminal changes define a distinct molecule.

Compound

PE 22-28

PE 22-28 is a synthetic heptapeptide corresponding to residues 22 to 28 of the sortilin propeptide. It is not a fragment of spexin; see the nomenclature note.

PE(22-28) · Sortilin propeptide (22-28)

Compound

Selank

Selank is a synthetic heptapeptide consisting of the tetrapeptide tuftsin extended at the C-terminus with the tripeptide Pro-Gly-Pro.

Selanc · Tuftsin-Pro-Gly-Pro · TP-7 · TP-7

Compound

Semax

Semax is a synthetic heptapeptide corresponding to residues 4 to 7 of adrenocorticotropic hormone extended at the C-terminus with the tripeptide Pro-Gly-Pro.

ACTH(4-7)-Pro-Gly-Pro

Compound

TB-500

Analytical studies have identified an N-terminally acetylated heptapeptide with the residue sequence LKKTETQ in material labeled TB-500. The designation alone does not establish the complete molecular identity of another preparation.

N-acetyl-thymosin beta-4 (17-23)

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Related molecular mechanisms

No published mechanisms are currently linked to this category.

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Relevant glossary terms

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Verified bibliography

  1. Reference 1

    Spadin, a sortilin-derived peptide, targeting rodent TREK-1 channels: a new concept in the antidepressant drug design.

    Mazella J, Pétrault O, Lucas G, Deval E, Béraud-Dufour S, Gandin C, El-Yacoubi M, Widmann C, Guyon A, Chevet E, Taouji S, Conductier G, Corinus A, Coppola T, Gobbi G, Nahon JL, Heurteaux C, Borsotto M

    PLoS biology · 2010-04-13 · Journal Article

    current
  2. Reference 2

    Shortened Spadin Analogs Display Better TREK-1 Inhibition, In Vivo Stability and Antidepressant Activity.

    Djillani A, Pietri M, Moreno S, Heurteaux C, Mazella J, Borsotto M

    Frontiers in pharmacology · 2017-09-12 · Journal Article

    current
  3. Reference 3

    Detection and in vitro metabolism of AOD9604.

    Cox HD, Smeal SJ, Hughes CM, Cox JE, Eichner D

    Drug testing and analysis · 2014-09-10 · Journal Article

    current
  4. Reference 4

    Synthesis and characterization of the N-terminal acetylated 17-23 fragment of thymosin beta 4 identified in TB-500, a product suspected to possess doping potential.

    Esposito S, Deventer K, Goeman J, Van der Eycken J, Van Eenoo P

    Drug testing and analysis · 2012-09-07 · Journal Article

    current
  5. Reference 5

    Doping control analysis of TB-500, a synthetic version of an active region of thymosin β₄, in equine urine and plasma by liquid chromatography-mass spectrometry.

    Ho EN, Kwok WH, Lau MY, Wong AS, Wan TS, Lam KK, Schiff PJ, Stewart BD

    Journal of chromatography. A · 2012-09-23 · Journal Article

    current
  6. Reference 6

    TB500/TB1000 and SGF1000: A scientific approach for a better understanding of misbranded and adulterated drugs.

    Delcourt V, Garcia P, Chabot B, Barnabé A, Bouscarel M, Loup B, Popot MA, Bailly-Chouriberry L

    Drug testing and analysis · 2022-12-23 · Journal Article

    current
  7. Reference 7

  8. Reference 8

    One-Pot Peptide Ligation-Oxidative Cyclization Protocol for the Preparation of Short-/Medium-Size Disulfide Cyclopeptides.

    Spengler J, Blanco-Canosa JB, Forni L, Albericio F

    Organic letters · 2018-06-28 · Journal Article

    current
  9. Reference 9

    Semax, an analog of ACTH(4-10) with cognitive effects, regulates BDNF and trkB expression in the rat hippocampus.

    Dolotov OV, Karpenko EA, Inozemtseva LS, Seredenina TS, Levitskaya NG, Rozyczka J, Dubynina EV, Novosadova EV, Andreeva LA, Alfeeva LY, Kamensky AA, Grivennikov IA, Myasoedov NF, Engele J

    Brain research · 2006-09-22 · Journal Article

    current
  10. Reference 10

    Selank Administration Affects the Expression of Some Genes Involved in GABAergic Neurotransmission.

    Volkova A, Shadrina M, Kolomin T, Andreeva L, Limborska S, Myasoedov N, Slominsky P

    Frontiers in pharmacology · 2016-02-18 · Journal Article

    current

Study models of these references

What kind of experiment each cited paper reports, taken from its abstract unless marked. Not a summary of results.

ReferenceStudy models
Mazella J et al. 2010Study models reported: in vitro; animal (mouse) · from the abstract
Djillani A et al. 2017Study models reported: in vitro; animal (mouse) · from the abstract
Cox HD et al. 2014Study models reported: in vitro · from the abstract
Esposito S et al. 2012Chemical, structural or analytical study; no biological model reported
Ho EN et al. 2012Study models reported: in vitro; animal (horse) · from the abstract
Delcourt V et al. 2022Chemical, structural or analytical study; no biological model reported
Vanhee C et al. 2020Chemical, structural or analytical study; no biological model reported
Spengler J et al. 2018Chemical, structural or analytical study; no biological model reported
Dolotov OV et al. 2006Study models reported: animal (rat) · from the abstract
Volkova A et al. 2016Study models reported: animal (rat) · from the abstract

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Related Purely Peptides research articles

No existing Research Article is mapped to this class seed record.

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Related compound classes