Preparation of dual responsive low-molecular-weight hydrogel for long-lasting drug delivery
摘要:
A novel low-molecular-weight hydrogel (LMWG) was fabricated by oligopeptide and phenylboronic acid to obtain a smart molecular hydrogel with dual glucose and pH response for long-term drug delivery in this study. Dual glucose and pH responsiveness of the blank molecular hydrogel was first evaluated by on-line tracking the dynamics curves using UV spectroscopy. Model drugs of phenformin for antidiabetes and doxorubicin for anticancer were selected to evaluate the drug carry and glucose/pH responsive drug release of the molecular hydrogel. The results showed the drug-loaded LMWG had good sustaining and long-lasting drug delivery in physiological or pathological environment. (C) 2017 Elsevier Ltd. All rights reserved.
Structure–activity relationship study of syringolin A as a potential anticancer agent
作者:Takuya Chiba、Akira Matsuda、Satoshi Ichikawa
DOI:10.1016/j.bmcl.2015.06.015
日期:2015.11
A detailed structure–activityrelationship of syringolin A (1), which is a promising antitumor natural product, was described. We previously developed syringolin A analog 2 as a potent proteasome inhibitor by the structure-based drug design of syringolin A. In this Letter, we synthesized a range of analogs of 2, having a different length of the lipophilic chain and substituted aryl group, and their
Discovery of Hydrolysis-Resistant Isoindoline <i>N</i>-Acyl Amino Acid Analogues that Stimulate Mitochondrial Respiration
作者:Hua Lin、Jonathan Z. Long、Alexander M. Roche、Katrin J. Svensson、Florence Y. Dou、Mi Ra Chang、Timothy Strutzenberg、Claudia Ruiz、Michael D. Cameron、Scott J. Novick、Charles A. Berdan、Sharon M. Louie、Daniel K. Nomura、Bruce M. Spiegelman、Patrick R. Griffin、Theodore M. Kamenecka
DOI:10.1021/acs.jmedchem.8b00029
日期:2018.4.12
to mice improves glucose homeostasis and increases energy expenditure, indicating that this pathway might be useful for treating obesity and associated disorders. We report the full account of the synthesis and mitochondrial uncoupling bioactivity of lipidated N-acyl amino acids and their unnatural analogues. Unsaturated fatty acid chains of medium length and neutral amino acid head groups are required
Enantioselectively catalyzed hydrolysis of p-nitrophenyl esters of N-protected L or D-amino acids by optically active hydroxamic acid and dipeptides
作者:Shuji Ono、Hideto Shosenji、Kimiho Yamada
DOI:10.1016/s0040-4039(01)82916-6
日期:1981.1
Catalyzed hydrolysis of p-nitrophenyl esters of N-protected L or D-phenylalanine by opticallyactive hydroxamic acid or dipeptides in the presence of CTABr micelles showed high enantioselectivity (D/L=5.68 for L-ZLysZ(MHX)), demonstrating control of the direction of the enantioselectivity based on the balance of the structures of the nucleophile and substituent.
在CTABr胶束的存在下,旋光性异羟肟酸或二肽催化的N-保护的L或D-苯丙氨酸的对硝基苯基酯的水解反应显示出高对映选择性(L-ZLysZ(MHX)的D / L = 5.68),表明对对映选择性的方向基于亲核体和取代基的结构平衡。
Isolation and total synthesis of gymnastatin N, a POLO-like kinase 1 active constituent from the fungus Arachniotus punctatus
作者:Chee Wee Phoon、Brinda Somanadhan、Sabrina Cher Hui Heng、Anna Ngo、Siew Bee Ng、Mark S. Butler、Antony D. Buss、Mui Mui Sim
DOI:10.1016/j.tet.2004.09.046
日期:2004.12
as a minor component. Gymnastatin N (1) was found to be a 52:48 mixture of (1S,6′R) and (1R,6′R) diastereomers, by synthesis of the four possible diastereomers and comparison of the optical rotation and chiral HPLC profile of each diastereoisomer with the natural product. Analogues of 1 were synthesized and evaluated against the Plk1 assay and these SAR studies suggested that the diene and free carboxylic
residue bound to the dihexadecylamine component (N+C5HisAla2C16) afforded tubular aggregates in the aqueous dispersion. The hydrolysis of enantiomeric esters of various hydrophobic nature, which was carried out in the single-walled vesicles, showed relatively small enantioselectivity. The reasons for...