Development of Peptide 3D Structure Mimetics: Rational Design of Novel Peptoid Cholecystokinin Receptor Antagonists
摘要:
The two hormones cholecystokinin and gastrin share the same C-terminal sequence of amino acids, namely Gly(29)-Trp(30)-Met(31)-Asp(32)-Phe(33)-NH2. Nevertheless, this congruence has not precluded using this structure to develop selective ligands for either CCK1 or CCK2 receptors. Manipulation of the hydrophobic residues at positions 31 and 33 gave a series of CCK1 tripeptide antagonists, typified by N-t-BOC-Trp-2-Nal-Asp-2-(phenyl)ethylamide (pK(B) 6.8 +/- 0.3). Molecular modeling was used to identify the bioactive conformation of these CCK1-selective compounds and prompted the design of new peptoid structures. We aimed to maintain the conformation of the parent series by exploiting patterns of hydrogen-bonding and pi-stacking interactions present in the original molecule, rather than introducing additional covalent bonds. The prototype, N-(succinyl-o-Asp-2-phenylethylamido)-L-Trp-2-( 2-naphthyl) ethylamide, was a potent and selective CCK1 antagonist (pK(B) 7.2 +/- 0.3). Furthermore, the new series showed patterns of biological activity that mirrored those of the parent tripeptides. These compounds contain elements of both peptide primary and secondary structure and represent a novel approach to designing peptidomimetics. Interesting results were obtained from comparing models of a representative tripeptide CCK1 antagonist with a conformation of CCK30-33 that others have proposed to be responsible for its activity at the CCK2 receptor. The results suggest that CCK1 and CCK2 receptors recognize enatiomeric dispositions of the Trp(30) indole, Asp(32) carboxylic acid, and C-terminal phenyl groups arrayed about a common backbone configuration. This "functional chirality" may underpin the mechanism by which these closely related receptor systems bind CCK30-33 and explain patterns of selectivity observed with optical isomers of a number of peptoid and nonpeptide ligands.
Compositions for Treatment of Cystic Fibrosis and Other Chronic Diseases
申请人:Vertex Pharmaceuticals Incorporated
公开号:US20150231142A1
公开(公告)日:2015-08-20
The present invention relates to pharmaceutical compositions comprising an inhibitor of epithelial sodium channel activity in combination with at least one ABC Transporter modulator compound of Formula A, Formula B, Formula C, or Formula D. The invention also relates to pharmaceutical formulations thereof, and to methods of using such compositions in the treatment of CFTR mediated diseases, particularly cystic fibrosis using the pharmaceutical combination compositions.
COMPOSITIONS FOR TREATMENT OF CYSTIC FIBROSIS AND OTHER CHRONIC DISEASES
申请人:Van Goor Fredrick F.
公开号:US20110098311A1
公开(公告)日:2011-04-28
The present invention relates to pharmaceutical compositions comprising an inhibitor of epithelial sodium channel activity in combination with at least one ABC Transporter modulator compound of Formula A, Formula B, Formula C, or Formula D. The invention also relates to pharmaceutical formulations thereof, and to methods of using such compositions in the treatment of CFTR mediated diseases, particularly cystic fibrosis using the pharmaceutical combination compositions.
The difference between fluorescence lifetimes of the following amino acids: phenylalanine (Phe), tyrosine (Tyr), (O-methyl)tyrosine (Tyr(Me)), (3-hydroxy)tyrosine (Dopa), (3,4-dimethoxy)phenylalanine (Dopa(Me)2) and their amides was used to testify the mechanism of fluorescencequenching of aromatic amino acids by the amide group. On the basis of the Marcus theory of photoinduced electron transfer
以下氨基酸的荧光寿命之间的差异:苯丙氨酸(Phe),酪氨酸(Tyr),(O-甲基)酪氨酸(Tyr(Me)),(3-羟基)酪氨酸(Dopa),(3,4-二甲氧基)苯丙氨酸(Dopa(Me)2)及其酰胺被用于证明酰胺基团对芳香族氨基酸进行荧光猝灭的机理。基于马库斯理论,得到了上述氨基酸的In k ET与因激发能而降低的电离电势之间的光诱导电子转移的抛物线关系。该发现表明发生了从激发的生色团基团到酰胺基团的光诱导电子转移。
Organic Compounds
申请人:BHALAY Gurdip
公开号:US20100130506A1
公开(公告)日:2010-05-27
A compound of Formula I
in free or salt or solvate form, where R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
, R
8
, R
9
, R
10
and R
11
have the meanings as indicated in the specification, is useful for treating diseases which respond to the blockade of the epithelial sodium channel. Pharmaceutical compositions that contain the compounds and processes for preparing the compounds are also described.
[EN] COMPOSITIONS FOR TREATMENT OF CYSTIC FIBROSIS AND OTHER CHRONIC DISEASES<br/>[FR] COMPOSITIONS DESTINÉES AU TRAITEMENT DE LA MUCOVISCIDOSE ET D'AUTRES MALADIES CHRONIQUES
申请人:VERTEX PHARMA
公开号:WO2011050325A1
公开(公告)日:2011-04-28
The present invention relates to pharmaceutical compositions comprising an inhibitor of epithelial sodium channel activity in combination with at least one compound of Formula I, Formula II, or Formula III. The invention also relates to solid forms and to pharmaceutical formulations thereof, and to methods of using such compositions in the treatment of CFTR mediated diseases, particularly cystic fibrosis using the pharmaceutical combination compositions.