Analogs of the .delta. opioid receptor selective cyclic peptide [cyclic][2-D-penicillamine,5-D-penicillamine]-enkephalin: 2',6'-dimethyltyrosine and Gly3-Phe4 amide bond isostere substitutions
摘要:
In order to develop systemically-active opioid peptides, the delta-selective, opioid pentapeptide [D-Pen2,D-Pen5]-enkephalin (DPDPE) was modified by esterification and by substitution of 2,6-dimethyltyrosine for tyrosine to yield 4. Compound 4 was on the order of 8- and 800-fold more active than DPDPE in both delta and mu-opioid radioligand binding assays, respectively, in rat neural membrane suspensions. Compound 4 was considerably more potent than DPDPE at inhibiting contractions of electrically-stimulated mouse vas deferens in vitro, and this effect was very sensitive to naltrindole, a delta-selective opioid antagonist. These observations can be taken as indication that 4 exerts its effects through delta-opioid receptors. This interpretation is supported by the finding that the EC50 value of 4 derived in the smooth muscle assay is very similar to that derived in NG108-15 neuroblastoma cells, a preparation devoid of mu-receptors. Unlike DPDPE, 4 exhibited significant, naloxone-sensitive, antinociceptive activity when administered systemically, as measured by inhibition of phenylbenzquinone-induced stretching in mice (ED50 = 2.1 mg/kg). Compound 4 also displayed significant antinociceptive activity following systemic administration as measured by its action in mice to increase latencies for tail withdrawal from radiant heat (ED50 = 50 mg/kg). Compound 4 did not produce morphine-like discriminative stimulus effects in rats trained to discriminate 3.0 mg/kg morphine from vehicle at doses ranging from 30 to 120 mg/kg. This observation can be interpreted as indication that within this dosage range there is an absence of morphine-like subjective effects. Physical dependence, however, could be induced in mice at higher doses of 4 under a progressively-graded, 4-day dose regimen. Congeners of 4 with amide bond surrogates for the Gly-Phe amide bond (oxymethylene, trans-double bond, and bismethylene isosteres) in the cyclic core of DPDPE were prepared in an attempt to increase the antinociceptive activity of 4. While some of the were active in the in vitro assays, they did not display significant antinociceptive activity following systemic administration. The preparation of all the compounds was accomplished by solution-phase methods. The which might underlie the biological and systemic activity of 4 are discussed.
Analgesic Compounds, Compositions, and Uses Thereof
申请人:Mannion James C.
公开号:US20110224269A1
公开(公告)日:2011-09-15
The invention relates to compounds, compositions, and methods for diminishing pain in a subject in need thereof comprising administering the compounds and compositions herein described.
这项发明涉及化合物、组合物和方法,用于减轻需要的受试者的疼痛,包括给予所述的化合物和组合物。
CYCLOSPORIN ANALOGS
申请人:Allergan, Inc.
公开号:US20170029469A1
公开(公告)日:2017-02-02
Disclosed herein are novel analogs of cyclosporin, pharmaceutical compositions containing them, and methods for their use in the treatment of dry eye and other conditions.
本文披露了环孢霉素的新型类似物,包含它们的药物组合物,以及它们在治疗干眼症和其他疾病中的使用方法。
The synthesis and conformational analysis of a pair of diastereoisomeric cyclic peptides with cis and transamide bonds, respectively
N-Protected, conformationally constrained, eight-membered ring containingcyclicdipeptides derived from methyl cyclo-[(R)-cysteinyl-(R)-penicillamine] contain a cis amide bond, whilst the corresponding peptides derved from cyclo-[(R)-cysteinyl-(S)-penicillamine] contain a transamide bond.
A compact fluorescence/circular dichroism dual-modality probe for detection, differentiation, and detoxification of multiple heavy metal ions via bond-cleavage cascade reactions
Selective detection of multiple analytes in a compact design with dual-modality and theranostic features presents great challenges. Herein, we wish to report a coumarin-thiazolidine masked D-penicillamine based dual-modality fluorescent probe COU-DPA-1 for selective detection, differentiation, and detoxification of multiple heavy metalions (Ag+, Hg2+, Cu2+). The probe shows divergent fluorescence
Method for inducing cell death with carbonyl scavengers
申请人:Wondrak T. Georg
公开号:US20050197400A1
公开(公告)日:2005-09-08
Carbonyl scavengers, which have been recognized for their ability to react with reactive carbonyl species, have been implicated as agents that can accelerate or induce the death of abnormal cells without having a parallel effect on normal cells. As such, they are useful therapeutic agents in cases where the acceleration or induction of cell death is desirable, such as in cells where the normal apoptotic pathways have been disrupted and where hyperproliferative cell growth occurs.