假设 RNA 在生命起源中发挥了关键作用,而向更复杂但更稳定的 DNA 过渡以进行连续信息存储和复制需要开发核糖核苷酸还原酶以从核糖核苷酸中获得脱氧核糖核苷酸。这一步,以及从非生物分子到基于 DNA 的生命的替代路径是完全未知的。这里显示的是在相关的益生元条件下,在水中以高区域和立体选择性,通过与乙醛和糖形成前体缩合,从所有典型的嘌呤和嘧啶碱基中形成脱氧核糖核苷。因此,已经发现了一条从简单的、益生元可用的分子开始的脱氧核糖核苷的连续途径。此外,deoxyapionucleosides (DApiNA) 被确定为潜在的 DNA 祖细胞。
Lewis acid catalyst, transforming the well known, but drastic, exchange of the acetyl group of vinyl acetate with pyrimidine and purine derivatives in a very gentle and quick method to obtain a whole set of vinyl nucleobases.
Solvent-free, microwave assisted 1,3-cycloaddition of nitrones with vinyl nucleobases for the synthesis of N,O-nucleosides
作者:Olga Bortolini、Maurizio D'Agostino、Antonio De Nino、Loredana Maiuolo、Monica Nardi、Giovanni Sindona
DOI:10.1016/j.tet.2008.06.074
日期:2008.8
A number of 4′-aza-2′,3′-dideoxy nucleosides have been synthesized in good yields and short reaction times by straightforward microwave assisted 1,3-cycloaddition of vinyl nucleobases with nitrones, in the absence of solvent. The vinyl nucleobases are used, for the first time, in their unprotected form.
Synthesis and biological evaluation of diastereoisomerically pure N,O-nucleosides
作者:Olga Bortolini、Antonio De Nino、Tommaso Eliseo、Riccardo Gavioli、Loredana Maiuolo、Beatrice Russo、Fabio Sforza
DOI:10.1016/j.bmc.2010.08.024
日期:2010.10
Several N,O-nucleosides have been synthesized in good yields by direct 1,3-dipolar cyclization methodology, in the absence of solvent. A remarkable cis stereoselectivity (de 98%) was observed by tuning the substituents on the nitrone moiety. A good number of these N,O-nucleosides have been evaluated for cytotoxic activity against selected cellular lines. Some of the tested compounds have proven to
The present invention relates generally to the fields of genetics and medicine. More specifically, the present invention relates to improved methods of treating cancers using a TLR3 agonist, by assessing the expression of a TLR3 receptor by cancer cells.
The invention discloses a pharmaceutical combination of
- a TLR3-agonist and
- Interleukin 24 (IL-24),
especially for use in the treatment of cancer or for the treatment of viral infections.