Two phosphoramidite derivatives, 1 and 2, each bearing two orthogonal functions: alkyne/thioacetyl or alkyne/tosyl, respectively, were synthesized and used to generate heteroglyco 5′-oligonucleotide conjugates. After coupling, the first conjugation was performed using CuAAC on solid support with an azide-bearing carbohydrate. For 1, the second conjugation was performed in solution by a thiol “click”
Synthesis and Biological Activity of Some Bile Acid-Based Camptothecin Analogues
作者:Xingnuo Li、Tengfei Zhao、Dongping Cheng、Chu Chu、Shengqiang Tong、Jizong Yan、Qing-Yong Li
DOI:10.3390/molecules19033761
日期:——
In an effort to decrease the toxicity of camptothecin (CPT) and improve selectivity for hepatoma and colon cancer cells, bile acid groups were introduced into the CPT 20 or 10 positions, resulting in the preparation of sixteen novel CPT-bile acid analogues. The compounds in which a bile acid group was introduced at the 20-hydroxyl group of CPT showed better cytotoxic selectivity for human hepatoma and colon cancer cells than for human breast cancer cells. Fluorescence microscopy analysis demonstrated that one compound (E2) entered human hepatoma cells more effectively than it did human breast cancer cells. Compound G4 exhibited the best anti-tumour activity in vivo. These results suggested that introduction of a bile acid group at the 20-position of CPT could decrease toxicity in vivo and improve selectivity for hepatoma cells.
Molecular Umbrellas Modulate the Selective Toxicity of Polyene Macrolide Antifungals
作者:Andrzej S. Skwarecki、Kornelia Skarbek、Dorota Martynow、Marcin Serocki、Irena Bylińska、Maria J. Milewska、Sławomir Milewski
DOI:10.1021/acs.bioconjchem.8b00136
日期:2018.4.18
Antifungal polyene macrolide antibiotics Amphotericin B (AmB) and Nystatin (NYS) were conjugated through the ω-amino acid linkers with diwalled “molecularumbrellas” composed of spermidine-linked deoxycholic or cholic acids. The presence of “umbrella” substituents modulated biological properties of the antibiotics, especially their selective toxicity. Some of the AmB-umbrella conjugates demonstrated
[EN] BILE ACID-GCPII INHIBITOR CONJUGATES TO TREAT INFLAMMATORY DISEASES<br/>[FR] CONJUGUÉS INHIBITEURS DE GCPII-ACIDE BILIAIRE POUR TRAITER DES MALADIES INFLAMMATOIRES
申请人:UNIV JOHNS HOPKINS
公开号:WO2021155167A1
公开(公告)日:2021-08-05
GCPII inhibitors comprising 2-(phosphonomethyl) pentanedioic acid (2-PMPA) conjugated to a bile acid and their use for treating a disease or condition associated with elevated levels of GCPII, including inflammatory bowel disease.
Fifteen berberine–bile acid analogues were synthesized. Anticancer activities of these analogues compared with
berberine (BBR) were evaluated in vitro; among the analogues, A4, B4, and B5 had higher cytotoxicity than that of BBR.
Most of the analogues showed higher antimicrobial activity against Staphylococcus aureus ATCC 25923 and
Staphylococcus albus ATCC 8799 than that of BBR, but Bacillus subtilis AS 1.398 and Escherichia coli ATCC 31343
were not sensitive to all of the analogues. A4 and B4 were stable in the serum stability assay. B4 showed promising oral
bioavailability in mice.