N-Benzylnaltrindole hydrochloride is a potent δ2-selective opioid receptor antagonist. Benzylnaltrindole hydrochloride has a long duration of action in vivo than Naltriben (NTB). N-Benzylnaltrindole hydrochloride iserve as a useful tool in the pharmacologic characterization of δ-opioid receptor function[1].
Gluten exorphin C is an opioid peptide derived from wheat gluten. Its IC50 values are 40 μM and 13.5 μM for μ opioid and δ opioid activities in the GPI and MVD assays, respectively.
Cyprodime hydrochloride is a highly selective μ-opioid receptor antagonist with Ki values of 5.4 nM, 244.6 nM and 2187 nM for μ-, δ- and κ-opioid receptors, respectively. Cyprodime hydrochloride has anti-depressant-like effect[1][2].
(D-Met2,Pro5)-Enkephalinamide is a highly potent opiate agonist, and shows antinociceptive activity[1][2][3].
Naloxegol oxalate (NKTR-118 oxalate; AZ-13337019 oxalate) is an opioid-receptor antagonist[1].
Sec-O-Glucosylhamaudol is a natural compound extracted from Peucedanum japonicum Thunb, decreases levels of μ-opioid receptor, with analgesic effect[1].
Dynorphin B (1-9) is a neuropeptide and N-terminal cleavage product of dynorphin B. The formation of dynorphin B (1-9) is blocked by N-ethylmaleimide (NEM), a non-selective inhibitor of cysteine peptidases[1].
Naltriben mesylate is a potent delta-2 receptor-selective antagonist, with Kis are 0.013, 19 and 152 nM for δ, μ and κ receptors respectively. Naltriben mesylate selectively attenuates alcohol intake in rats bred for alcohol preference[1][2].
Naloxone hydrochloride is a potent opioid receptor antagonist.
Icalcaprant is a kappa-opioid receptor antagonist[1].
(Rac)-SNC80 is a racemate of SNC80 (HY-101202). SNC80 (NIH 10815) is a potent, highly selective and non-peptide δ-opioid receptor agonist with a Ki of 1.78 nM and an IC50 of 2.73 nM. SNC80 shows antinociceptive, antihyperalgesic and antidepressant‐like effects. SNC80 has the potential for multiple headache disorders treatment[1][2][3][4][5][6].
μ opioid receptor agonist 2 （Compound H-3）is an optically pure oxaspiro ring substituted pyrrolopyrazole derivative, acts as a MOR receptor agonist and can be used for the research of pain and pain related diseases[1].
Deltakephalin is a potent, selective opiate δ-receptor agonist. Deltakephalin has analgesic properties[1].
UFP-101 is a potent, selective, and competitive antagonist of the nociceptin/orphanin FQ (NOP) receptor, with a pKi of 10.24. UFP-101 displays >3000-fold selectivity over δ, μ and κ opioid receptors. UFP-101 shows antidepressant-like effect[1][2].
Alvimopan dihydrate(LY 246736; ADL 8-2698) is a peripherally acting mu-opioid receptor (PAM-OR, IC50= 1.7 nM) antagonist for accelerating gastrointestinal recovery after surgery. IC50 Value: 1.7 nM (Mu-type opioid receptor) [1]Target: mu-opioid receptorin vitro: The dissociation rate of alvimopan from the micro opioid receptor (t(1/2)=30--44 min) was comparable to that of the long acting partial agonist buprenorphine (t(1/2)=44 min), but was slower than those of the antagonists naloxone (t(1/2)=0.82 min) and N-methylnaltrexone (t(1/2)=0.46 min) [2].in vivo: Alvimopan did not significantly accelerate GI-3 compared with placebo [6 mg: hazard ratio (HR) = 1.20, p = 0.080; 12 mg: HR = 1.24, p = 0.038). However, after adjustment for significant covariates (sex/surgical duration), benefits were significant for both doses (6 mg: HR = 1.24, p = 0.037; 12 mg: HR = 1.26, p = 0.028). Alvimopan also significantly accelerated time to GI-2 (6 mg: HR = 1.37, p = 0.008; 12 mg: HR = 1.33, p = 0.018) and DCO (6 mg: HR = 1.31, p = 0.008; 12 mg: HR = 1.28, p = 0.015) [3]. Alvimopan (1 and 3 mg/kg) significantly reversed this delayed GI transit when administered 45 min prior to surgery. However, the effects of alvimopan were less pronounced when administered following surgery [4].Toxicity:The most common treatment-emergent adverse events across all treatment groups were nausea, vomiting, and hypotension; the incidence of nausea and vomiting was reduced by 53 percent in thealvimopan 12-mg group [5].Clinical trial: Intercostal Nerve Block With Liposome Bupivacaine in Subjects Undergoing Posterolateral Thoracotomy. Phase 3
N-Desmethylclozapine is a dengue virus inhibitor, and an agonist of δ-opioid receptor.
Noscapine hydrochloride ((S,R)-Noscapine hydrochloride) is an orally active phthalideisoquinoline alkaloid with potent antitussive. Noscapine hydrochloride exerts its antitussive effects by activating sigma opioid receptors and is a non-competitive Bradykinin inhibitor. Noscapine hydrochloride disrupts microtubule dynamics, induces mitotic arrest and apoptosis. Noscapine hydrochloride possesses anticancer, neuroprotective, anti-inflammatory activities, and can crosse the blood-brain barrier[1][2][3][4][5].
Dalargin is a potent δ-opioid receptor agonist. Dalargin mitigates Gentamicin (HY-A0276)-induced cell death. Dalargin shows nephroprotective effects on Gentamicin-induced kidney injury. Dalargin shows antiulcer activity[1][2][3].
SB-612111 is a novel and potent human opiate receptor-like orphan receptor (ORL-1) antagonist with a high affinity for hORL-1 (Ki=0.33 nM). SB-612111 exhibits selectivity for μ-, κ- and δ-receptors with Ki values of 57.6 nM, 160.5 nM and 2109 nM, respecticely. SB-612111 effectively antagonizes the pronociceptive action of Nociceptin (HY-P0183) in an acute pain model[1].
DALDA is a potent and highly selective μ-opioid receptor agonist with a Ki of 1.69 nM. DALDA shows antinociceptive and respiratory effects[1].
Matrine(Sophocarpidine; α-Matrine) is an alkaloid found in plants from the Sophora genus. It has a variety of pharmacological effects, including anti-cancer effects, and action as a kappa opioid receptor and u-receptor agonist.IC50 Value: 540 μg/ml (inhibit gastric cancer cell line MNK45, MTT) [1]Target: u-receptor/kappa opioid in vitro: MTT assay showed that the matrine was able to inhibit gastric cancer cell line MNK45 in a dose-dependent manner. The concentration required for 50% inhibition (IC50) was found to be 540 μg/ml. This anti-tumor function was achieved through modulation of the NF-κB, XIAP, CIAP, and p-ERK proteins expression in cell line MNK45. Matrine induces apoptosis of human NSCLC cells with anti-apoptotic factors inhibited and dependent on caspase activity. In addition, we found that matrine increases the phosphorylation of p38 but not its total protein, and inhibition of the p38 pathway with SB202190 partially prevents matrine-induced apoptosis. Furthermore, matrine generates reactive oxygen species (ROS) in a dose- and time-dependent manner, which is reversed by pretreatment with N-acetyl-L-cysteine (NAC) [2].in vivo: Oral administration of matrine (200, 100 and 50 mg/kg) significantly attenuated isoproterenol-induced cardiac necrosis and left ventricular dysfunction [3]. high dose of matrine significantly reduced the mortality rate of mice with LPS administration. Treatment with matrine improved LPS-induced lung histopathologic changes, alleviated pulmonary edema and lung vascular leak, inhibited MPO and MDA activity,and reduced the production of inflammatory mediators including TNF-α, IL-6 and HMGB1 [4].Toxicity: N/AClinical trial: N/A
LY2444296 is an orally bioavailable, high-affinity and selective short-acting kappa opioid receptor (KOPR) antagonist, with a Ki value of ∼1 nM. LY2444296 exhibits anti-anxiety like effects[1][2].
Dermorphin is a natural heptapeptide μ-opioid receptor (MOR) agonist found in amphibian skin.
JDTic is a highly selective antagonist for the κ-opioid receptor; without affecting the μ- or δ-opioid receptors. IC50 value:Target: κ-opioid receptorJDTic is a 4-phenylpiperidine derivative, distantly structurally related to analgesic drugs such as meperidine and ketobemidone, and more closely to the mu opioid antagonist alvimopan, and is structurally distinct from other kappa antagonists such as norbinaltorphimine. JDTic has a very long duration of action, with effects in animals seen for up to several weeks after administration of a single dose, although its binding to the kappa opioid receptor is not irreversible and its long-acting effects are instead caused by altered activity of c-Jun N-terminal kinases. Animal studies suggest that it may produce antidepressant and anxiolytic effects, as well as having possible application in the treatment of addiction to cocaine and morphine.
Hemorphin-7 is a hemorphin peptide, an endogenous opioid peptide derived from the β-chain of hemoglobin. Hemorphin peptides exhibits antinociceptive and antihypertensive activities, activating opioid receptors and inhibiting angiotensin-converting enzyme (ACE).
Bevenopran is a peripheral μ-opioid receptor antagonist.
(S,S)-J-113397 is an isomer of J-113397 (HY-114072). J-113397 is an Opioid Receptor antagonist[1].
Endomorphin 1 acetate, a high affinity, highly selective agonist of the μ-opioid receptor (Ki: 1.11 nM), displays reasonable affinities for kappa3 binding sites, with Ki value between 20 and 30 nM. Endomorphin 1 acetate has antinociceptive properties[1][2][4].
Naloxegol (NKTR-118; AZ-13337019) is an opioid-receptor antagonist[1].
Sinomenine, an alkaloid extracted from Sinomenium acutum, is a blocker of the NF-κB activation[1]. Sinomenine also is an activator of μ-opioid receptor[2].