Synthesis and evaluation of anti-tumor activities of N4 fatty acyl amino acid derivatives of 1-β-arabinofuranosylcytosine
摘要:
1-beta-D-Arabinofuranosylcytosine (Ara-C, Cytarabine) is one of the drugs used for acute nonlympbocytic leukemia (ANLL). However, the bioavailability of Ara-C is relatively low due to its low lipophilicity. In order to improve the lipophilicity and bioavailability of Ara-C, a series of N-4 derivatives of Ara-C, i.e., (fatty acid)-(amino acid)-Ara-C analogues, were prepared. The 15 derivatives synthesized were characterized by their melting points, optical rotations and partition coefficients. It was found that the Ara-C derivatives synthesized in this study were more lipophilic than Ara-C as determined by their partition coefficients. Their in vitro cytotoxicity and in vivo anti-tumor activity were determined and compared with that of Ara-C. It was found that the derivatives were more active than Ara-C in Hela cells, but not in HL-60 cells. The in vivo results showed that some of the derivatives were more effective than Ara-C in mice bearing S-180 tumor while others showed a decreased activity in comparison with Ara-C. (C) 2009 Elsevier Masson SAS. All rights reserved.
Synthesis and evaluation of anti-tumor activities of N4 fatty acyl amino acid derivatives of 1-β-arabinofuranosylcytosine
摘要:
1-beta-D-Arabinofuranosylcytosine (Ara-C, Cytarabine) is one of the drugs used for acute nonlympbocytic leukemia (ANLL). However, the bioavailability of Ara-C is relatively low due to its low lipophilicity. In order to improve the lipophilicity and bioavailability of Ara-C, a series of N-4 derivatives of Ara-C, i.e., (fatty acid)-(amino acid)-Ara-C analogues, were prepared. The 15 derivatives synthesized were characterized by their melting points, optical rotations and partition coefficients. It was found that the Ara-C derivatives synthesized in this study were more lipophilic than Ara-C as determined by their partition coefficients. Their in vitro cytotoxicity and in vivo anti-tumor activity were determined and compared with that of Ara-C. It was found that the derivatives were more active than Ara-C in Hela cells, but not in HL-60 cells. The in vivo results showed that some of the derivatives were more effective than Ara-C in mice bearing S-180 tumor while others showed a decreased activity in comparison with Ara-C. (C) 2009 Elsevier Masson SAS. All rights reserved.
A cosmetic composition for skin and/or hair, which comprises at least one kind of substance selected from the group consisting of an N
&agr;
,N
G
-di-acylarginine, for example, a compound represented by the following general formula (I):
1
wherein R
1
and R
2
each independently represents a straight or branched-chain alkyl group having 1 to 21 carbon atoms or a straight or branched-chain alkenyl group having 2 to 21 carbon atoms. The cosmetic composition imparts much moistness and superior conditioning effects such as body or elasticity to hair, and to skin, said composition does not impart tackiness and blocked feeling, whilst imparts superior feeling of use such as moistness.
important activation component for multiple types of prebiotics on early Earth. Synergistic symbiosis between N-acyl amino acid (NAA)-type membrane precursor and peptide can be realized via sodium trimetaphosphate (P3m) activation effect based on the different activation mechanisms, which plays a significant role in the emergence of functionalized protocells.
Oral compositions comprising NG-acyl derivatives of arginine
申请人:Johnson & Johnson Products Inc.
公开号:EP0104768A2
公开(公告)日:1984-04-04
Oral hygiene formulations incorporating NG-acyl derivatives of arginine, or the pharmaceutically acceptable salts thereof, optionally in combination with fluoride compounds, are effective in combatting microorganisms, inhibiting acid production and reducing dental caries.
Method for inactivating viruses by addition of slightly acidic arginine
申请人:Ajinomoto Co., Inc.
公开号:EP1958626A1
公开(公告)日:2008-08-20
The present invention provides a method for conveniently producing a protein formulation with viruses being inactivated, without impairing the quality of the obtained protein formulation, characterized by including the step of exposing the protein formulation contaminated with the viruses to a 0.1-2M aqueous solution of arginine, an arginine derivative or a mixture thereof, the aqueous solution being adjusted to pH 3.5 to 5. The present invention also provides a virus inactivation method characterized by including the step of bringing a virus-containing object into contact with a 0.1-2M aqueous solution of arginine, a arginine derivative or a mixture thereof, the aqueous solution being adjusted to pH 3.5 to 5.
Provided is a composition containing the following components (A), (B) and (C) and suppressing formation of scum during cleansing, wherein a weight ratio of (A)/(B) is 0.2-5 and a weight ratio of ((A)+(B))/(C) is 0.01-10:
(A) N-lauroyl glycine or a salt thereof
(B) N-myristoyl glycine or a salt thereof
(C) N-acyl acidic amino acid having an acyl group having 8 to 24 carbon atoms, or a salt thereof.