Synthesis and bio-evaluation of novel hypocrellin derivatives: Potential photosensitizers for photodynamic therapy of age-related macular degeneration
摘要:
The phototherapeutic window from 600 to 900 nm is necessary for photodynamic therapy (PDT) of solid tumors, but may not suitable for PDT of some microvascular diseases, like age-related macular degeneration (AMD), because of its deep penetration. Moreover, absorption of some neighboring photoreceptors should be avoided for PDT of AMD. Considering these, yellow-orange light may be a proper phototherapeutic window of AMD. Herein, two novel amino-alkyl-sulfonic acid-substituted hypocrellin B derivatives, 3 and 4 were designed and synthesized. They exhibited the maximal absorption at yellow-orange light, and possessed higher PDT activity than 2, proved by the in vitro or in vivo experiments. Besides, 4 showed much higher PDT activity than 3, ascribed to its higher cellular uptake suggested by its optimized amphiphilicity and liposome mimic results. And the vascular leakage of 4 was close to 2. Consequently, 4 has great potential for PDT of AMD or other superficial diseases. (C) 2013 Elsevier Ltd. All rights reserved.
Probiotics. Antistaphylococcal and antifibrinolytic activities of .omega.-amino- and .omega.-guanidinoalkanesulfonic acids
作者:Akira Fujii、Elton S. Cook
DOI:10.1021/jm00239a013
日期:1975.5
the omega-guanidinoalkanesulfonic acids. Most of the omega-aminoalkanesulfonic acids have antifibrinolyticactivity, while none of the omega-guanidinoalkanesulfonic acids has significant antifibrinolyticactivity. Compound 4 possessed the highest antifibrinolyticactivity which was equal to or greater than that of epsilon-aminohexanoic acid.
4,5-Dihydro-5-thioxo-]<i>H</i>-tetrazoie-l-alkanoic and alkanesulfonic acids and their amide derivatives
作者:David A. Berges、George W. Chan、Theodore J. Polansky、John J. Taggart、George L. Dunn
DOI:10.1002/jhet.5570150615
日期:1978.9
Homologous 4,5-dihydro-5-thioxo-1H-tetrazole-l-alkanoic and alkanesulfonicacids were prepared by reaction of sodium azide with methyl (carboxyalkyl)- and (sulfoalkyl) carbamodithioates, respectively. 4,5-Dihydro-5-thioxo-1H-tetrazole-i-alkanamides were derived from the corresponding alkanoic acids by aminolysis of their acid chlorides or imidazolides. Analogous alkane-sulfonamides were synthesized
membrane. Herein, to balancepotency and physicochemicalproperties, a series of gut-restrictedTGR5agonists with diversified kinetophores had been designed and synthesized. Compound 22-Na exhibited significant antidiabetic effect, and showed favorable gallbladder safety after 7 days of oral administration in humanized TGR5H88Y mice, confirming that gut-restricted agonism of TGR5 is a viable strategy