摘要:
The subject compounds, which are adapted for the site-specific/sustained delivery of centrally acting drug species to the brain, are:(a) compounds of the formula[D--DHC] (I) wherein [D] is a centrally acting drug species, and [DHC] is the reduced, biooxidizable, blood-brain barrier penetrating lipoidal form of a dihydropyridine .revreaction. pyridinium salt redox carrier, with the proviso that when [DHC] is ##STR1## wherein R is lower alkyl or benzyl and [D] is a drug species containing a single NH.sub.2 or OH functional group, the single OH group when present being a primary or secondary OH group, said drug species being linked directly through said NH.sub.2 or OH functional group to the carbonyl function of [DHC], then [D] must be other than a sympathetic stimulant, steroid sex hormone or long chain alkanol; and(b) non-boxic pharmaceutically acceptable salts of compounds of formula (I) wherein [D] is a centrally acting drug species and [DHC] is the reduced, biooxidizable, blood-brain barrier penetrating lipoidal form of a dihydropyridine .revreaction. pyridinium salt redox carrier. The corresponding ionic pyridinium salt type drug/carrier entities [D--QC].sup.+ X.sup.- are also disclosed.
摘要:
The invention provides compounds of the formulaD--DHC].sub.n (I)and the nontoxic pharmaceutically acceptable salt thereof, wherein D is the residue of a centrally acting drug containing at least one reactive functional group selected from the group consisting of amino, hydroxyl, mercapto, carboxyl, amide and imide, said residue being characterized by the absence of a hydrogen atom from at least one of said reactive functional groups in said drug; n is a positive integer equal to the number of said functional groups from which a hydrogen atom is absent; and [DHC] is the reduced, biooxidizable, blood-brain barrier penetratring lipoidal form of a dihydropyridine.revreaction.pyridinium salt redox carrier, said carrier comprising a bivalent radical of the formula ##STR1## wherein the alkylene group can be straight or branched and can contain 1 to 3 carbon atoms; R.sub.o is a radical identical to the corresponding portion of a natural amino acid; and p is 1 or 2, provided that, when p is 2, then the alkylene groups can be the same or different and the R.sub.o radicals can be the same or different; said bivalent radical being so positioned that the terminal carbonyl function of the bivalent radical is linked to the drug residue while the terminal amino function of the bivalent radical is linked to the remaining portion of the carrier moiety. The subject compounds are adapted for the site-specific/sustained delivery of centrally acting drugs to the brain. The corresponding pyridinium salt type drug/carrier entities D--QC.sup.+ ].sub.n q.sup.y-t are also disclosed.
摘要:
Compounds of the formula: ##STR1## wherein R.sup.1 and R.sup.2 stand for alk-2-enyl radicals of not more than 6 carbon atoms, A stands for Gly or Azgly, B stands for Leu or Met, J stands for --(CH.sub.2).sub.n --, wherein n stands for an integer from 1 to 10, or a phenylene radical, and pharmaceutically-acceptable acid-addition salts thereof. Processes for the manufacture of the compounds. Pharmaceutical compositions comprising one of the compounds and a pharmaceutical diluent or carrier. The compounds are selective .delta.-opiate-receptor antagonists.
摘要:
The purification of an endogenous composition isolated from mammalian brain tissue and termed enkephalin ("in the head"). Enkephalin is recovered from brain tissue by acetone solution and purified by means of column and thin layer chromatography. The composition which is a mixture of two pentapeptides, namely, (a) H-Tyr-Gly-Gly-Phe-Met-OH and (b) H-Tyr-Gly-Gly-Phe-Leu-OH wherein the ratio of a:b is from 3:1 to 4:1 has been found to be a non-addictive narcotic and an opiate agonist.The synthesis of the pentapeptide composition from the known structure above is accomplished by conventional solution techniques of protection of the amino groups, such as t-butyloxycarbonyl, benzyloxycarbonyl, and t-amyloxycarbonyl, or the solid phase peptide synthesis of R. Bruce Merrifield using a polymeric support and the same or similar amine protecting groups.
摘要:
A method of recovering a hormone from human blood plasma which has morphine agonist properties which comprises heating said plasma, extracting into butanol to recover anodynin, and purifying said anodynin by centrifuging and ion exchange column separation. Anodynin has a molecular weight of about 600.