The Synthesis ofN-Terminal Acetylpeptides of Ovalbumin and Mammalian Heart Cytochrome c
摘要:
以前的研究分别从牛和马心脏的卵清蛋白和细胞色素 c 的酶解产物中分离出了乙酰甘氨酰丝氨酸和乙酰甘氨酰天冬氨酰丙氨酰谷氨酸。为了证实分离出的乙酰肽的结构,我们合成了乙酰甘氨酰-丝氨酸和乙酰甘氨酰-天冬氨酰-缬氨酰-谷氨酸。实验证明,天然乙酰肽与人工合成的乙酰肽在各方面都是相同的。对乙酰四肽合成过程中遇到的一些问题进行了讨论。
Self-assembling short peptides can offer an opportunity to make useful nano-/microstructures that find potential application in drug delivery. We report here the formation of multivesicular structures from self-assembling water-soluble synthetic amphiphilic dipeptides containing a glutamic acid residue at the C-terminus. These vesicular structures are stable over a wide range of pH (pH 2–12). However, they are sensitive towards calcium ions. This causes the rupturing of these vesicles. Interestingly, these vesicles can not only encapsulate an anticancer drug and a fluorescent dye, but also can release them in the presence of calcium ions. Moreover, these multivesicular structures have the potential to carry biologically important molecules like cyclic adenosine monophosphate (cAMP) within the cells keeping their biological functions intact. A MTT cell-survival assay suggests the almost nontoxic nature of these vesicles. Thus, these peptide vesicles can be used as biocompatible delivery vehicles for carrying drugs and other bioactive molecules.
Stereochemical aspects in the synthesis of novel N-(purin-6-yl)dipeptides as potential antimycobacterial agents
作者:Vera V. Musiyak、Irina A. Nizova、Evgeny N. Chulakov、Liliya Sh. Sadretdinova、Andrey A. Tumashov、Galina L. Levit、Victor P. Krasnov
DOI:10.1007/s00726-021-02958-0
日期:2021.3
The synthesis of purine conjugates with natural amino acids is one of the promising directions in search for novel therapeutic agents, including antimycobacterial agents. The purpose of this study was to synthesize N-(purin-6-yl)dipeptides containing the terminal fragment of (S)-glutamic acid. To obtain the target compounds, two synthetic routes were tested. The first of them is based on coupling of
N-acyl peptide, processes for their preparation and pharmaceutical compostions thereof
申请人:FUJISAWA PHARMACEUTICAL CO., LTD.
公开号:EP0085255A2
公开(公告)日:1983-08-10
Compounds of the formula:
wherein
R1 is hydrogen, alkanoyloxy or alkenoyloxy;
R2 is alkyl or alkenyl;
R3 and R4 are each hydrogen, lower alkyl, hydroxy(lower)alkyl, ar(lower) alkyl, esterified carboxy(lower)alkyl, carboxy-(lower)alkyl, protected amino(lower)alkyl or amino(lower)alkyl;
R5 is hydrogen, hydroxy(lower)alkyl, protected amino-(lower)alkyl, amino(lower)alkyl, carboxy(lower)alkyl or esterified carboxy(lower)alkyl;
R6 is carboxy, esterifed carboxy or sulfo(lower)alkyl;
A1, A2 and A3 are each bond or lower alkylene; and m and n are each an integer of 0 or 1; and their pharmaceutically- acceptable salts have anti-complementary activity and fibrinolytic activity, and are useful as therapeutic agents for immunecomplex diseases or autoimmune diseases such as nephritis, rheumatic diseases, systemic lupus erythematosus, etc. and thrombosis such as cerebral apoplexy, coronary insufficiency, pulmonary embolism.
Probiotic treatment of skin diseases, disorders, and infections: formulations, methods and systems
申请人:Baum Marc M.
公开号:US10238597B2
公开(公告)日:2019-03-26
The present invention teaches compositions, methods and kits for treating skin conditions, including dandruff. In various embodiments, the compositions include an effective amount of one or more probiotic microorganism of vaginal origin and/or a fraction thereof and/or a component of the metabolome for preventing and/or treating skin disorders of the scalp.
Small molecule metabolites for the diagnosis of bacterial vaginosis and assessment of disease risk
申请人:Fred Hutchinson Cancer Research Center
公开号:US10690651B2
公开(公告)日:2020-06-23
The invention disclosed herein generally relates to methods and kits for diagnosing, assessing disease risk, treating, and preventing bacterial vaginosis (BV) and associated conditions. Additional embodiments include methods for developing metabolic profiles associated with increased disease risk, and developing new approaches to treat BV based on interrupting metabolic networks.