2 resultados para self-adjusting systems

em DigitalCommons@The Texas Medical Center


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In 1996 and in 1997, Congress ordered the Secretary of Health and Human Services to undertake a process of negotiated rulemaking, which is authorized under the Negotiated Rulemaking Act of 1990, on three separate rulemaking matters. Other Federal agencies, including the Environmental Protection Agency and the Occupational Health and Safety Administration, have also made use of this procedure. As part of the program to reinvent government, President Clinton has issued an executive order requiring federal agencies to engage in some negotiated rulemaking procedures. I present an analytic, interpretative and critical approach to looking at the statutory and regulatory provisions for negotiated rulemaking as related to issues of democratic governance surrounding the problem of delegation of legislative power. The paradigm of law delineated by Jürgen Habermas, which sets law the task of achieving social or value integration as well as integration of systems, provides the background theory for a critique of such processes. My research questions are two. First, why should a citizen obey a regulation which is the result of negotiation by directly interested parties? Second, what is the potential effect of negotiated rulemaking on other institutions for deliberative democracy? For the internal critique I argue that the procedures for negotiated rulemaking will not produce among the participants the agreement and cooperation which is the legislative intent. For the external critique I argue that negotiated rulemaking will not result in democratically-legitimated regulation. In addition, the practice of negotiated rulemaking will further weaken the functioning of the public sphere, as Habermas theorizes it, as the central institution of deliberative democracy. The primary implication is the need to mitigate further development of administrative agencies as isolated, self-regulating systems, which have been loosened from the controls of democratic governance, through the development of a robust public sphere in which affected persons may achieve mutual understanding. ^

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Feline immunodeficiency virus (FIV)-based gene transfer systems are being seriously considered for human gene therapy as an alternative to vectors based on primate lentiviruses, a genetically complex group of retroviruses capable of infecting non-dividing cells. The greater phylogenetic distance between the feline and primate lentiviruses is thought to reduce chances of the generation of recombinant viruses. However, safety of FIV-based vector systems has not been tested experimentally. Since primate lentiviruses such as human and simian immunodeficiency viruses (HIV/SIV) can cross-package each other's genomes, we tested this trait with respect to FIV. Unexpectedly, both feline and primate lentiviruses were reciprocally able to both cross-package and propagate each other's RNA genomes. This was largely due to the recognition of viral packaging signals by the heterologous proteins. However, a simple retrovirus such as Mason-Pfizer monkey virus (MPMV) was unable to package FIV RNA. Interestingly, FIV could package MPMV RNA, but not propagate it for further steps of replication. These findings suggest that upon co-infection of the same host, cross-packaging may allow distinct retroviruses to generate chimeric variants with unknown pathogenic potential. ^ In order to understand the packaging determinants in FIV, we conducted a detailed mutational analysis of the region thought to contain FIV packaging signal. We show that the first 90–120 nt of the 5′ untranslated region (UTR) and the first 90 nt of gag were simultaneously required for efficient FIV RNA packaging. These results suggest that the primary FIV packaging signal is multipartite and discontinuous, composed of two core elements separated by 150 nt of the 5 ′UTR. ^ The above studies are being used towards the development of safer FIV-based self-inactivating (SIN) vectors. These vectors are being designed to eliminate the ability of FIV transfer vector RNAs to be mobilized by primate lentiviral proteins that may be present in the target cells. Preliminary test of the first generation of these vectors has revealed that they are incapable of being propagated by feline proteins. The inability of FIV transfer vectors to express packageable vector RNA after integration should greatly increase the safety of FIV vectors for human gene therapy. ^