摘要:
The nucleotide sequence of the PCHL1 plasmid which is specific to Chlamydia trachomatis (CT) is reported. Synthetic oligonucleotides with sequences homologous or corresponding to a region of at least 10 consecutive nucleotide bases selected from the sequence of the plasmid are particularly useful for the determination of CT in a biological sample.
摘要:
New thymopentin (TP5) analogues whose bonds in the peptide chain are all retro-inverted are disclosed. Such new compounds have the following general formula (I) wherein R is hydrogen or an acyl radical, and R¹ is a group of the formula -OR², wherein R² is a hydrogen atom or a hydrocarbon radical, and the corresponding basic or acid addition salts which are pharmaceutically acceptable. The new compounds have immunostimulating activity.
摘要:
New formulations are described containing a calcitonin as active principle and suitable for rectal administration in the form of soft gelatin capsules, in which the active principle, possibly mixed with a stabilizer, is dispersed in a liquid vehicle consisting of a polyethyleneglycol or a mixture of polyethyleneglycols of different molecular weight which has the consistency of a homogeneous fluid at ambient temperature, and possibly a C₂-C₆ alcohol with at least 2 hydroxyl groups, and present in a weight quantity of less than 15%. Said formulations, which contain no absorption adjuvant, enable the same pattern of hematic levels to be obtained as obtainable by conventional intramuscular administration, for equal unit dosages. Moreover, the absence of water makes said formulations highly stable.
摘要:
An improvement is described in the synthesis method for N α -trityl-N G -trityl-arginine within a process for preparing N α -fluorenylmethoxycarbonyl-N G -trityl-arginine from arginine, comprising: a) forming N α -trityl-N G -trityl-arginine b) selectively detaching the trityl group from the α-NH₂ and c) introducing the fluorenylmethoxycarbonyl group in its place. The improvement consists of preparing the N α -trityl-N G -trityl-arginine by solubilizing the arginine in an aprotic organic solvent by tri-alkylsilylation both of the amino nitrogen and of the carboxyl group, followed by tritylation, with trityl chloride, of the α-amino nitrogen, and of the guanidino group after deprotonating this latter with a bicyclic guanidine. The new improved process can also lead to variable quantities of the arginine analogue di-tritylated at the guanidino group, namely N α -fluorenylmethoxycarbonyl-N G -di-trityl-arginine. This new compound, to which the present invention also relates, can also be used as such in peptide synthesis.
摘要:
The invention is concerned with compounds analogous to tuftsin, having the formula (I) or of a pharmaceutically acceptable base-addition or acid-addition salt thereof, and the use of them in vaccines as an adjuvant in order to potentiate, in a living organism, the antibody response against either natural or synthetic antigens, as well as with the novel compositions for vaccines which comprise one or more of said antigens together with an adjuvating amount of the compound of formula (I) or of one of its addition salts.
摘要:
New pertussis toxin (PT) mutants are described being immunologically active and having reduced or no toxicity, characterized in that at least one of the aminoacid residues Glu129, Asp11, Trp26, Arg9, Phe50, Asp1, Arg13, Tyr130, Gly86, Ile88, Tyr89, Tyr8, Gly 44, Thr53 and Gly80 of subunit's 1 aminoacid sequence is deleted and substituted by a different aminoacid residue selected in the group of natural aminoacids; Bordetella strains capable of providing and secreting said PT mutants and means and methods for obtaining them are also described. The Bordetella strains and the PT mutants produced by them are particularly suitable for the preparation of effective cellular and acellular antipertussis vaccines.
摘要:
This invention relates to new gem-diamino derivatives of general formula (I) where
R is the side chain of an amino acid, of which any functional groups are suitably protected, and X is an acyl group chosen from the group consisting of 2-nitro-benzoyl, 4-chloro-butyryl, acetoacetyl, 4-bromo-butyryl, (2-nitro-phenoxy)-acetyl and 2-methyl-2-(2'-nitro-phenoxy)propionyl, of use in introducing gem-diamino residues into retro-inverso peptides. The invention further relates to a method for the synthesis of retro-inverso peptides in which the gem-diamino residue or residues are introduced using the new compound (I).
摘要:
An improvement is described in the synthesis method for N α -trityl-N G -trityl-arginine within a process for preparing N α -fluorenylmethoxycarbonyl-N G -trityl-arginine from arginine, comprising:
a) forming N α -trityl-N G -trityl-arginine b) selectively detaching the trityl group from the α-NH₂ and c) introducing the fluorenylmethoxycarbonyl group in its place.
The improvement consists of preparing the N α -trityl-N G -trityl-arginine by solubilizing the arginine in an aprotic organic solvent by tri-alkylsilylation both of the amino nitrogen and of the carboxyl group, followed by tritylation, with trityl chloride, of the α-amino nitrogen, and of the guanidino group after deprotonating this latter with a bicyclic guanidine. The new improved process can also lead to variable quantities of the arginine analogue di-tritylated at the guanidino group, namely N α -fluorenylmethoxycarbonyl-N G -di-trityl-arginine. This new compound, to which the present invention also relates, can also be used as such in peptide synthesis.
摘要:
There are described a protective immunodominant epitope of pertussis toxin which is included in the S1 subunit, and synthetic peptides with an aminoacid sequence similar to that of the epitope or to regions thereof which show an immunochemical reactivity with anti-PT protective monoclonal antibodies equivalent to that of the protein itself. Ihe peptides are particularly useful for the preparation of an antipertussis vaccine.
摘要:
A new mono-silylating agent of general formula (I) (R₁,R₂,R₃)Si-NH-CO-O-Si(R₁,R₂,R₃) (I) is described as well as its use in the preparation of chromatographic supports based on silica with functional groups covalently bonded thereto, the so-called "bonded stationary phases". The new compounds are easy and safe to prepare from the corresponding mono-halosilanes with ammonium carbamate, and their use as silylating agents leads to stationary phases with a higher degree of surface coating than that attainable with the corresponding chlorosilanes.