The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 1985
Filed:
Sep. 22, 1983
Martti Vaara, Helsinki, SF-00320, FI;
Other;
Abstract
A compound having the general formula ##STR1## in which Dab is diaminobutyric acid; A is either leucine, threonine, isoleucine or phenylalanine; B is either leucine or threonine; D is either D-leucine or D-phenylalanine; and C is a substituent selected from the group comprising --Dab--Thr, --Dab--Thr--Dab, --Dab, --Dab--Thr--Acyl and H, in which Thr is threonine, Acyl is a lower acyl group of 1 to 5 carbon atoms and Dab is as defined above. These compounds are useful in sensitizing Gram-negative bacteria to antibacterial agents and to the host defence mechanism complement when subjecting said Gram-negative bacteria to the action of said compounds. The invention also provides a pharmaceutical composition for use in sensitizing Gram-negative bacteria to antibacterial agents, complement or both, comprising a therapeutically effective amount of said compound in admixture with a pharmaceutically acceptable carrier. Polymyxin B nonapeptide having the formula: ##STR2## is produced by treating polymyxin B with ficin, papain or bromelin.