Radiosynthesis and Bioimaging of the Tuberculosis Chemotherapeutics Isoniazid, Rifampicin and Pyrazinamide in Baboons
摘要:
The front-line tuberculosis (TB) chemotherapeutics isoniazid (INH), rifampicin (RIF), and pyrazinamide (PZA) have been labeled with carbon-11 and the biodistribution of each labeled drug has been determined in baboons using positron emission tomography (PET). Each radiosynthesis and formulation has been accomplished in 1 h, using [C-11]CH3I to label RIF and [C-11]HCN to label INH and PZA. Following iv administration, INH, PZA, RIF, and/or their radiolabeled metabolites clear rapidly from many tissues; however, INH, PZA, and/or their radiolabeled metabolites accumulate in the bladder while RIF and/or its radiolabeled metabolites accumulates in the liver and gall bladder, consistent with the known routes of excretion of the drugs. In addition, the biodistribution data demonstrate that the ability of the three drugs and their radiolabeled metabolites to cross the blood brain barrier decreases in the order PZA > INH > RIF, although in all cases the estimated drug concentrations are greater than the minimum inhibitory concentration (MIC) values for inhibiting bacterial growth of Mycobacterium tuberculosis (MTB). The pharmacokinetic (PK) and drug distribution data have important implications for treatment of disseminated TB in the brain and pave the way for imaging the distribution of the pathogen in vivo.
Background: In the present study, new triazine derivatives 3, 4, 5, 6, 8 and 10 were synthesized starting from readily available cyanuric chloride 1 via nucleophilic displacement with morpholine followed by Suzuki or Stille coupling reactions and then the thermal displacement of chlorine atom with diverse substituted amines. Methods: All synthesized compounds were screened for their cytotoxic activity
DIKETO-PIPERAZINE AND PIPERIDINE DERIVATIVES AS ANTIVIRAL AGENTS
申请人:Wang Tao
公开号:US20070249579A1
公开(公告)日:2007-10-25
This disclosure provides compounds having drug and bio-affecting properties, their pharmaceutical compositions and method of use. In particular, the disclosure is concerned with diketo piperazine and piperadine derivatives that possess unique antiviral activity. More particularly, the present disclosure relates to compounds useful for the treatment of HIV and AIDS.
Cloxacepride and related compounds: a new series of orally active antiallergic compounds
作者:Gunter Metz、M. H. Pindell、H. L. Chen
DOI:10.1021/jm00361a022
日期:1983.7
4-[[(p-Chlorophenoxy)acetyl]amino]-5-chloro-2-methoxy-N-[2-(diethylamino)ethyl]benzamide (cloxacepride, 1), exhibited substantial oral antiallergicpotential in a reaginic PCA test in rats over a wide range of antigenic challenge times. Available reference compounds with oral activity, such as doxantrazole and 7-(2-hydroxyethoxy)-9-oxoxanthene-2-carboxylic acid (AH 7725, 4), were active only when administered
The present invention relates to compounds of formula I,
1
in which R
0
; R
1
; R
2
; R
3
; R
4
; R
5
; R
6
; R
7
; Q; V, G and M have the meanings indicated in the claims. The compounds of formula I are valuable pharmacologically active compounds. They exhibit a strong antithrombotic effect and are suitable, for example, for the therapy and prophylaxis of cardiovascular disorders like thromboembolic diseases or restenoses. They are reversible inhibitors of the blood clotting enzymes factor Xa (FXa) and/or factor VIIa (FVIIa), and can in general be applied in conditions in which an undesired activity of factor Xa and/or factor VIIa is present or for the cure or prevention of which an inhibition of factor Xa and/or factor VIIa is indicated. The invention furthermore relates to processes for the preparation of compounds of formula I, their use, in particular as pharmaceuticals for treating the foregoing conditions, and pharmaceutical preparations comprising them.
A New Type of Chemical Modification of Glycopeptides Antibiotics: Aminomethylated Derivatives of Eremomycin and Their Antibacterial Activity.
作者:ANDREI Y. PAVLOV、EDUARD I. LAZHKO、MARIA N. PREOBRAZHENSKAYA
DOI:10.7164/antibiotics.50.509
日期:——
A series of derivatives of eremomycin aminomethylated at the 7d position of the resorcinol ring of the amino acid No. 7 was prepared by interaction of eremomycin with formaldehyde and various primary and secondary amines and ammonia. The most active compound obtained was 7d-decylaminomethyl derivative, whose minimal inhibitory concentrations for clinical isolates of staphylococci are 2-8 times lower than those of the parent antibiotic. 7d-Decylaminomethyl derivative was also active against vancomycin-resistant VanA enterococci (8 μg/ml) and Neisseria gonorrhoeae (16 μg/ml).