μ-opioid

Alvimopan (LY 246736) is a synthetic trans-3, 4-dimethyl-4-(3-hydroxyphenyl) piperidine with peripherally selective opioid mu receptor antagonist activity. Alvimopan is a selective and competitive antagonist at mu-opioid receptors, found in myenteric and submucosal neurons and the immune cells of the lamina propria in the human gut. Upon administration, this agent binds to mu-opioid receptors in the gut, thereby reversing opioid-related disturbances in gut motility. Alvimopan is approximately three to nine times more potent than naloxone.

Asimadoline (EMD-61753) is a proprietary small molecule therapeutic, originally discovered by Merck KGaA of Darmstadt, Germany. Asimadoline was originally developed to treat peripheral pain such as arthritis. Asimadoline is an orally administered agent that acts as a kappa opioid receptor agonist. It has shown encouraging clinical efficacy for the treatment of IBS in a barostat study in IBS patients and has the potential for treating other gastrointestinal diseases.

Asimadoline hydrochloride (EMD-61753 hydrochloride) is a κ-opioid receptor agonist potentially for the treatment of pruritus. Asimadoline hydrochloride has also been shown to be used in the treatment of irritable bowel syndrome.

σ 1 Receptor/ μ Opioid receiver modulator 1 (Compound 44) is an effective σ 1 receptor antagonist (Ki=1.86 nM) and μ Opioid receptor agonists (Ki=2.1 nM). Opioid receptor modulator 1 shows potent analgesic activity, and can be used for the research of neuropathic pain.

μ opioid receptor agonist 2 (Compound H-3) is a MOR receptor agonist used for research on pain and pain-related diseases.

μ opioid receptor agonist 1 (Compound H-1a) is an optically pure oxyheterocyclic substituted pyrroloxypyrazole derivative and an MOR receptor agonist that can be used in the study of pain and pain-related disorders.

Compound 20, identified as μ opioid receptor agonist 3, is a potent µOR agonist that exhibits an EC50 value of 0.87 nM. It holds promise for research into pain management and neuropsychiatric disorders [1].

μ/κ/δopioid receptor agonist1 is an agonist for the μ opioid receptor (MOR), κ opioid receptor (KOR), and δ opioid receptor (DOR). It produces potent and long-lasting analgesic effects in the tail flick test through peripheral MOR and KOR activation.

Compound 4x, also known as σ1 Receptor/μOpioid receptormodulator 2, acts as a μOR agonist and a σ1R antagonist, exhibiting a potent μOR EC50 of 0.6 nM and strong σ1R inhibitory activity (Ki: 363.7 nM). It demonstrates significant analgesic effects in various pain models.

Dermorphin is agonist of μ-opioid receptor (MOR) agonist.

Dermorphin TFA is a new class of opioids-like peptides

AT-121 is a dual μ-opioid and neuropeptide receptor partial agonist (Kis 16.49 and 3.67 nM, respectively). It stimulates [35S]GTPγS binding to cell membranes expressing either μ-opioid receptors or neuropeptide receptors (EC50s of 19.6 and 34.7 nM, respectively.) AT-121 (0.003-0.03 mg/kg) reduced capsaicin-induced thermal anisocoria in a dose-dependent manner, but did not increase scratching activity in rhesus monkeys. In rhesus monkey drug self-administration tests, AT-121 at doses of 0.3 to 10 μg/kg per injection lacked reinforcing effects (a potential marker of abuse) and did not reduce the reinforcing effects of food pellets.AT-121 (0.01 or 0.03 mg/kg) did not induce hyperalgesia, a marker of tolerance, in rhesus monkeys.AT-121 is a safe non-addictive pain reliever with anti-injury and analgesic effects.

Apitegromab (SRK-015) is a new myostatin inhibitor, an antibody targeting myostatin precursor, which can be used to study neuromuscular diseases including spinal muscular atrophy.

BAN ORL 24 is a highly potent nociceptin/orphan FQ (N/OFQ) receptor (NOP) antagonist that can be used to study neurological diseases.

BPR1M97 is a mu opioid receptor (MOP) and neuropeptide-orphin FQ (NOP) receptor agonist with blood-brain barrier permeability and potency, with Kis values of 1.8 nM for MOP and 4.2 nM for NOP.BPR1M97 exhibits anti-injurious effects and antinociceptive effects.

JNJ-20788560 is a delta opioid receptor (DOR) agonist with analgesic activity. It is more selective for DOR than for mu opioid receptors (MOR).

CP-866087 is a novel, potent and selective mu-opioid receptor antagonist for the study of female sexual dysfunction.

Samidorphan HCl is an orally active and highly potent modulator of the opioid system that binds to μ‐opioid, κ‐opioid, and delta-opioid receptors. Samidorphan HCl is a novel μ-opioid receptor antagonist, a partial agonist for k-opioid and delta-opioid receptors. Samidorphan HCl can be used to prevent and treat schizophrenia.

SNC 80 (NIH 10815) is a potent, highly selective and non-peptide δ-opioid receptor agonist, Ki = 1.78 nM, IC50 = 2.73 nM. SNC80 also selectively activates μ-δ heteromer in HEK293 cells with an EC50 of 52.8 nM. SNC80 shows antinociceptive, antihyperalgesic and antidepressant‐like effects. SNC80 has the potential for multiple headache disorders treatment.

Loperamide hydrochloride (ADL 2-1294) is a synthetic, piperidine derivative and opioid agonist with antidiarrheal activity.

Trimebutine (Mebutin) is a spasmolytic agent that regulates intestinal and colonic motility and relieves abdominal pain with antimuscarinic and weak mu-opioid agonist effects. It is marketed for the treatment of irritable bowel syndrome (IBS) and lower gastrointestinal tract motility disorders, with IBS being one of the most common multifactorial GI disorders. It is used to restore normal bowel function and is commonly present in pharmaceutical mixtures as trimebutine maleate salt form. Trimebutine is not an FDA-Approved/Clinical drug, but it is available in Canada and several other international countries.

Trimebutine maleate (Polibutin) is a weak mu-opioid agonist and has antimuscarinic effects. Trimebutine is an agonist of peripheral mu, delta, and kappa opiate receptors served as a spasmolytic drug for therapy of both chronic and acute abdominal pain.

Acetyl tetrapeptide-15 Acetate (Skinasensyl Acetate), a synthetic peptide used in cosmetic products for sensitive skin, is an endomorphin-2 derivative that extends the range of neuronal excitability thresholds in the μ-opioid receptor via an endorphin-like pathway, and can be used to study inflammatory and neuropathic pain produced by skin hyperreactivity. Inflammatory and neuropathic pain produced by skin hyperresponsiveness.

ML-335 is a μ-δ isomer-targeted agonist, a μOR-δOR-biased ligand that can serve as a scaffold for the development of unique types of (isomer-biased) drugs.ML-335 is a MOR (μ-opioid receptor)/DOR (δ-opioid receptor) heterodimer, with anti-injury sensory activity and pain inhibitory activity.