βendorphin, human

β-Endorphin (1-27) (human) acetate, existing in the hypophysis cerebri and hypothalamus, exhibits antinociception activity. β-Endorphin (1-27) (human) acetate is an agonist of opioid receptor, showing preferred affinity for μ-opioid receptor and δ-opioid

Acetyl β-endorphin (1-26) is a neuropeptide found in rat hippocampus, brain stem, and pituitary. It is also present in the human hypothalamus, where it comprises approximately 4.9% of total β-endorphin peptides. Acetyl β-endorphin (1-26) is produced through posttranslational processing of β-endorphin and is processed similarly in rat and human hypothalamus. Levels of acetyl β-endorphin (1-26) increase in the rat pars intermedia and brain stem following chronic administration of haloperidol .

β-Endorphin (1-27) is an endogenous peptide that binds to μ-, δ-, and κ-opioid receptors (Kis = 5.31, 6.17, and 39.82 nM, respectively, in COS-1 cells expressing rat receptors). It binds to rat and mouse brain membrane preparations (IC50s = 1.1 and 5.7 nM, respectively) and induces chemotaxis of human monocytes in vitro when used at a concentration of 1 nM. Intracerebroventricular administration of β-endorphin (1-27) increases the latency to tail withdrawal in response to thermal stimulation in mice with a median antinociceptive dose (AD50) of 1,500 pmol per animal. It inhibits antinociception induced by β-endorphin in mice in response to thermal stimuli when administered at a dose of 65 pmol per animal. In rats, β-endorphin (1-27) does not affect drug-associated place preference when administered at doses up to 20 μg, i.c.v., but inhibits β-endorphin-induced place preference when administered at a dose of 10 μg per animal.

β-Endorphin is an endogenous opioid neuropeptide and opioid receptor agonist that preferentially binds to μ-opioid receptors. Produced by specific neurons within the central and peripheral nervous system, it is one of three endorphins synthesized in humans. It functions to alleviate stress, maintain homeostasis, and regulate neurological pain perception [1].

β-Endorphin (1-27) (human) is an opioid antagonist that selectively binds to μ-, δ-, and κ-opioid receptors, with dissociation constants (Kis) of 5.31, 6.17, and 39.82 nM, respectively. It inhibits analgesia induced by both β-Endorphin and etorphine [1][2].

Acetyl-β-Endorphin (human) is a polypeptide identified through polypeptide screening, a research tool primarily using immunoassays to gather active polypeptides. This method is useful for protein interactions, functional analysis, antigen epitope screening, and particularly in the study and development of active molecules.