Fusobacterium Polypeptides for Infection Control
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Solution Overview
Problem
Current methods for controlling Fusobacterium necrophorum infections in cattle, such as liver abscesses, rely heavily on antibiotics and vaccines, but there is a need for more effective solutions to manage the economic losses and health impacts of these infections, particularly in relation to iron acquisition mechanisms that bacteria use to evade host defenses.
Innovation Solution
Development of compositions and methods involving isolated polypeptides from Fusobacterium necrophorum, specifically expressed under iron, copper, and zinc chelation conditions, which can be used to induce antibody production and treat infections by targeting specific metal-regulated proteins, thereby reducing bacterial colonization and infection severity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antibiotics and vaccines are used to control Fusobacterium necrophorum infections, then infection severity is reduced, but economic losses and health impacts persist due to bacterial evasion mechanisms
Solution Approach 1:
The patent extracts and isolates specific metal-regulated polypeptides (iron, copper, and zinc regulated) from Fusobacterium necrophorum. By identifying and separating these specific virulence factors that enable bacterial evasion and iron acquisition, the invention targets the core mechanisms allowing bacteria to persist despite antibiotic and vaccine treatment, thereby improving infection control effectiveness.
Solution Approach 2:
The patent utilizes changes in metal availability parameters (iron, copper, zinc chelation conditions) to induce expression of specific polypeptides. By growing bacteria under controlled metal-limiting conditions, the invention amplifies the production of metal-regulated virulence factors, enabling isolation and characterization of these critical proteins that mediate bacterial survival and evasion mechanisms.
2Reliability
If metal-regulated polypeptides are isolated and used as therapeutic targets, then bacterial colonization is decreased, but the complexity of identifying and producing these polypeptides increases
Solution Approach 1:
The patent performs preliminary action by pre-growing Fusobacterium necrophorum under specific metal-chelating conditions that induce polypeptide expression before isolation attempts. This preliminary culturing step ensures high levels of target polypeptide production, simplifying subsequent purification and reducing the overall complexity of obtaining sufficient quantities of these virulence factors for therapeutic development.
Solution Approach 2:
The patent creates copies of the metal-regulated polypeptides through recombinant expression systems. Once the native polypeptides are identified and characterized under metal-chelation conditions, their genetic sequences can be replicated and expressed in host systems, enabling large-scale production of these colonization-preventing proteins without repeatedly performing complex isolation procedures.
3Productivity
If iron acquisition mechanisms are disrupted, then bacterial growth is inhibited, but the specificity of targeting these mechanisms must be maintained to avoid host damage
Solution Approach 1:
The patent applies local quality by targeting specific metal-regulated polypeptides that are locally expressed only under iron-limiting conditions during infection. These polypeptides represent localized bacterial responses to host iron sequestration defenses. By targeting these specific locally-expressed virulence factors rather than general iron acquisition pathways, the invention inhibits bacterial growth while minimizing disruption to host iron metabolism and avoiding host tissue damage.
Data Source
AI summary
The present invention provides isolated polypeptides isolatable from a Fusobacterium spp. Also provided by the present invention are compositions that include one or more of the polypeptides, and methods for making and methods for using the polypeptides.