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    • 14. 发明授权
    • Recombinant bacterial system with environmentally limited viability
    • 具有环境有限生命力的重组细菌系统
    • US06610529B1
    • 2003-08-26
    • US08761769
    • 1996-12-06
    • Roy Curtiss, IIISteven A. Tinge
    • Roy Curtiss, IIISteven A. Tinge
    • C12N121
    • C12N15/64C12N15/70C12N15/74
    • Disclosed is an Environmentally Limited Viability System (ELVS) for microorganisms based on differences between permissive and non-permissive environments. Viability of the microorganisms are limited to a permissive environment by specifically expressing one or more essential genes only in the permissive environment, and/or expressing one or more lethal genes only in the non-permissive environment. Temporary viability in a non-permissive environment can be achieved by temporarily expressing one or more essential genes in a non-permissive environment, and/or temporarily delaying expression of one or more lethal genes in the non-permissive environment. Environmentally Limited Viability Systems are also disclosed involving coordinate expression of a combination of essential genes and lethal genes. Microorganisms containing an Environmentally Limited Viability System are useful for release into permissive and non-permissive environments. Temperature regulated Environmentally Limited Viability Systems and delayed death Environmentally Limited Viability Systems are particularly suited for delivery of expression products, such as antigens, using recombinant avirulent Salmonella by limiting their growth to the warmer environment inside the host, or by allowing growth for only a limited time in the host.
    • 公开了基于许可和非允许环境之间的微生物的环境有限的生存力系统(ELVS)。 通过仅在许可环境中特异性表达一个或多个必需基因,和/或仅在非允许环境中表达一个或多个致死基因,将微生物的活力限制为允许的环境。 通过在非允许环境中临时表达一种或多种必需基因,和/或在非允许环境中暂时延缓一种或多种致死基因的表达,可以实现非允许环境中的临时活力。 还公开了环境有限的生命力系统,涉及协调基本基因和致死基因组合的表达。 含有环境有限生命力系统的微生物对于释放到许可和不允许的环境中是有用的。 温度调节环境有限的生存能力系统和延迟死亡环境有限的生存能力系统特别适合于通过将其生长限制在宿主内较温暖的环境中,或通过允许生长仅限于有限的方式,使用重组无毒力沙门氏菌来递送表达产物,如抗原 时间在主机。
    • 17. 发明授权
    • Modified microorganisms and method of preparing and using same
    • 改性微生物及其制备及使用方法
    • US4968619A
    • 1990-11-06
    • US513237
    • 1983-10-17
    • Roy Curtiss, III
    • Roy Curtiss, III
    • C12N1/21C12N15/00
    • C12N15/00Y10S435/849
    • Microorganisms have been developed which may be characterized as possessing substantially all of the following qualities or capabilities:(a) capable of having foreign genetic information introduced thereinto and recovered therefrom along with its expression with production of useful gene products;(b) the microorganism being dependent for growth and survival upon defined conditions;(c) the microorganism being incapable of establishment or growth or colonization and/or survival under conditions or in ecological niches that are considered to be natural and/or undesirable for said microorganism;(d) the microorganism being capable of causing genetic information incorporated therein to undergo degradation under conditions or ecological niches that are considered to be natural and/or undesirable for said microorganism;(e) the microorganism being capable of permitting cloning vectors incorporated therein to be dependent for their replication, maintenance and/or function on said microorganism;(f) the microorganism being substantially incapable of transmitting cloning vectors or recombinant DNA molecules incorporated therein to other organisms under conditions or ecological niches that are considered to be natural and/or undesirable for said microorganism;(g) the microorganism being capable of being monitored by suitable means and/or techniques without substantial alteration of said microorganism; and(h) the microorganism being susceptible of substantially minimal contamination with other organisms when recombinant DNA molecules are incorporated therein and being substantially incapable of contaminating other organisms when incorporated therein or consumed thereby when recombinant DNA molecules are incorporated in said microorganism.
    • 已经开发了微生物,其特征在于具有基本上所有以下特征或能力:(a)能够将外源遗传信息与其表达一起引入并从其中回收并产生有用的基因产物; (b)微生物在规定的条件下依赖于生长和存活; (c)微生物在被认为对所述微生物是天然的和/或不期望的条件下或在生态龛内不能建立或生长或定殖和/或存活; (d)能够引入其中遗传信息的微生物在被认为是天然的和/或不希望的所述微生物的条件或生态位下进行降解; (e)能够允许并入其中的克隆载体依赖于其对所述微生物的复制,维持和/或功能的微生物; (f)微生物在被认为对所述微生物是天然的和/或不期望的条件或生态龛处基本上不能将掺入其中的克隆载体或重组DNA分子传输到其他生物体; (g)微生物能够通过适当的手段和/或技术进行监测,而不显着改变所述微生物; 和(h)当重组DNA分子并入其中时,微生物易于受到其他生物体的基本上最小的污染,并且当重组DNA分子并入所述微生物中时基本上不能将其掺入或消耗其它生物体而被污染。